(a)

existing and new power generating modules that are, or would be, classified as type B, C and D in accordance with the criteria set out in Article 5 of Commission Regulation (EU) 2016/631 (3);

(b)

existing and new transmission-connected demand facilities;

(c)

existing and new transmission-connected closed distribution systems;

(d)

existing and new demand facilities, closed distribution systems and third parties if they provide demand response directly to the TSO in accordance with the criteria in Article 27 of Commission Regulation (EU) 2016/1388 (4);

(e)

providers of redispatching of power generating modules or demand facilities by means of aggregation and providers of active power reserve in accordance with Title 8 of Part IV of this Regulation; and

(f)

existing and new high voltage direct current (‘HVDC’) systems in accordance with the criteria in Article 3(1) of Commission Regulation (EU) 2016/1447 (5).

(1)

‘operational security’ means the transmission system's capability to retain a normal state or to return to a normal state as soon as possible, and which is characterised by operational security limits;

(2)

‘constraint’ means a situation in which there is a need to prepare and activate a remedial action in order to respect operational security limits;

(3)

‘N-situation’ means the situation where no transmission system element is unavailable due to occurrence of a contingency;

(4)

‘contingency list’ means the list of contingencies to be simulated in order to test the compliance with the operational security limits;

(5)

‘normal state’ means a situation in which the system is within operational security limits in the N-situation and after the occurrence of any contingency from the contingency list, taking into account the effect of the available remedial actions;

(6)

‘frequency containment reserves’ or ‘FCR’ means the active power reserves available to contain system frequency after the occurrence of an imbalance;

(7)

‘frequency restoration reserves’ or ‘FRR’ means the active power reserves available to restore system frequency to the nominal frequency and, for a synchronous area consisting of more than one LFC area, to restore power balance to the scheduled value;

(8)

‘replacement reserves’ or ‘RR’ means the active power reserves available to restore or support the required level of FRR to be prepared for additional system imbalances, including generation reserves;

(9)

‘reserve provider’ means a legal entity with a legal or contractual obligation to supply FCR, FRR or RR from at least one reserve providing unit or reserve providing group;

(10)

‘reserve providing unit’ means a single or an aggregation of power generating modules and/or demand units connected to a common connection point fulfilling the requirements to provide FCR, FRR or RR;

(11)

‘reserve providing group’ means an aggregation of power generating modules, demand units and/or reserve providing units connected to more than one connection point fulfilling the requirements to provide FCR, FRR or RR;

(12)

‘load-frequency control area’ or ‘LFC area’ means a part of a synchronous area or an entire synchronous area, physically demarcated by points of measurement at interconnectors to other LFC areas, operated by one or more TSOs fulfilling the obligations of load-frequency control;

(13)

‘time to restore frequency’ means the maximum expected time after the occurrence of an instantaneous power imbalance smaller than or equal to the reference incident in which the system frequency returns to the frequency restoration range for synchronous areas with only one LFC area and in the case of synchronous areas with more than one LFC area, the maximum expected time after the occurrence of an instantaneous power imbalance of an LFC area within which the imbalance is compensated;

(14)

‘(N-1) criterion’ means the rule according to which the elements remaining in operation within a TSO's control area after occurrence of a contingency are capable of accommodating the new operational situation without violating operational security limits;

(15)

‘(N-1) situation’ means the situation in the transmission system in which one contingency from the contingency list occurred;

(16)

‘active power reserve’ means the balancing reserves available for maintaining the frequency;

(17)

‘alert state’ means the system state in which the system is within operational security limits, but a contingency from the contingency list has been detected and in case of its occurrence the available remedial actions are not sufficient to keep the normal state;

(18)

‘load-frequency control block’ or ‘LFC block’ means a part of a synchronous area or an entire synchronous area, physically demarcated by points of measurement at interconnectors to other LFC blocks, consisting of one or more LFC areas, operated by one or more TSOs fulfilling the obligations of load-frequency control;

(19)

‘area control error’ or ‘ACE’ means the sum of the power control error (‘ΔP’), that is the real-time difference between the measured actual real time power interchange value (‘P’) and the control program (‘P0’) of a specific LFC area or LFC block and the frequency control error (‘K*Δf’), that is the product of the K-factor and the frequency deviation of that specific LFC area or LFC block, where the area control error equals ΔP+K*Δf;

(20)

‘control program’ means a sequence of set-point values for the netted power interchange of a LFC area or LFC block over alternating current (‘AC’) interconnectors;

(21)

‘voltage control’ means the manual or automatic control actions at the generation node, at the end nodes of the AC lines or HVDC systems, on transformers, or other means, designed to maintain the set voltage level or the set value of reactive power;

(22)

‘blackout state’ means the system state in which the operation of part or all of the transmission system is terminated;

(23)

‘internal contingency’ means a contingency within the TSO's control area, including interconnectors;

(24)

‘external contingency’ means a contingency outside the TSO's control area and excluding interconnectors, with an influence factor higher than the contingency influence threshold;

(25)

‘influence factor’ means the numerical value used to quantify the greatest effect of the outage of a transmission system element located outside of the TSO's control area excluding interconnectors, in terms of a change in power flows or voltage caused by that outage, on any transmission system element. The higher is the value the greater the effect;

(26)

‘contingency influence threshold’ means a numerical limit value against which the influence factors are checked and the occurrence of a contingency located outside of the TSO's control area with an influence factor higher than the contingency influence threshold is considered to have a significant impact on the TSO's control area including interconnectors;

(27)

‘contingency analysis’ means a computer based simulation of contingencies from the contingency list;

(28)

‘critical fault clearing time’ means the maximum fault duration for which the transmission system retains stability of operation;

(29)

‘fault’ means all types of short-circuits (single-, double- and triple-phase, with and without earth contact), a broken conductor, interrupted circuit, or an intermittent connection, resulting in the permanent non-availability of the affected transmission system element;

(30)

‘transmission system element’ means any component of the transmission system;

(31)

‘disturbance’ means an unplanned event that may cause the transmission system to divert from the normal state;

(32)

‘dynamic stability’ is a common term including the rotor angle stability, frequency stability and voltage stability;

(33)

‘dynamic stability assessment’ means the operational security assessment in terms of dynamic stability;

(34)

‘frequency stability’ means the ability of the transmission system to maintain frequency stable in the N-situation and after being subjected to a disturbance;

(35)

‘voltage stability’ means the ability of a transmission system to maintain acceptable voltages at all nodes in the transmission system in the N-situation and after being subjected to a disturbance;

(36)

‘system state’ means the operational state of the transmission system in relation to the operational security limits which can be normal state, alert state, emergency state, blackout state and restoration state;

(37)

‘emergency state’ means the system state in which one or more operational security limits are violated;

(38)

‘restoration state’ means the system state in which the objective of all activities in the transmission system is to re-establish the system operation and maintain operational security after the blackout state or the emergency state;

(39)

‘exceptional contingency’ means the simultaneous occurrence of multiple contingencies with a common cause;

(40)

‘frequency deviation’ means the difference between the actual and the nominal frequency of the synchronous area which can be negative or positive;

(41)

‘system frequency’ means the electric frequency of the system that can be measured in all parts of the synchronous area under the assumption of a coherent value for the system in the timeframe of seconds, with only minor differences between different measurement locations;

(42)

‘frequency restoration process’ or ‘FRP’ means a process that aims at restoring frequency to the nominal frequency and, for synchronous areas consisting of more than one LFC area, a process that aims at restoring the power balance to the scheduled value;

(43)

‘frequency restoration control error’ or ‘FRCE’ means the control error for the FRP which is equal to the ACE of a LFC area or equal to the frequency deviation where the LFC area geographically corresponds to the synchronous area;

(44)

‘schedule’ means a reference set of values representing the generation, consumption or exchange of electricity for a given time period;

(45)

‘K-factor of an LFC area or LFC block’ means a value expressed in megawatts per hertz (‘MW/Hz’), which is as close as practical to, or greater than the sum of the auto-control of generation, self-regulation of load and of the contribution of frequency containment reserve relative to the maximum steady-state frequency deviation;

(46)

‘local state’ means the qualification of an alert, emergency or blackout state when there is no risk of extension of the consequences outside of the control area including interconnectors connected to this control area;

(47)

‘maximum steady-state frequency deviation’ means the maximum expected frequency deviation after the occurrence of an imbalance equal to or less than the reference incident at which the system frequency is designed to be stabilised;

(48)

‘observability area’ means a TSO's own transmission system and the relevant parts of distribution systems and neighbouring TSOs' transmission systems, on which the TSO implements real-time monitoring and modelling to maintain operational security in its control area including interconnectors;

(49)

‘neighbouring TSOs’ means the TSOs directly connected via at least one AC or DC interconnector;

(50)

‘operational security analysis’ means the entire scope of the computer based, manual and automatic activities performed in order to assess the operational security of the transmission system and to evaluate the remedial actions needed to maintain operational security;

(51)

‘operational security indicators’ means indicators used by TSOs to monitor the operational security in terms of system states as well as faults and disturbances influencing operational security;

(52)

‘operational security ranking’ means the ranking used by TSOs to monitor the operational security on the basis of the operational security indicators;

(53)

‘operational tests’ means the tests carried out by a TSO or DSO for maintenance, development of system operation practices and training and to acquire information on transmission system behaviour under abnormal system conditions and the tests carried out by significant grid users for similar purposes on their facilities;

(54)

‘ordinary contingency’ means the occurrence of a contingency of a single branch or injection;

(55)

‘out-of-range contingency’ means the simultaneous occurrence of multiple contingencies without a common cause, or a loss of power generating modules with a total loss of generation capacity exceeding the reference incident;

(56)

‘ramping rate’ means the rate of change of active power by a power generating module, demand facility or HVDC system;

(57)

‘reactive power reserve’ means the reactive power which is available for maintaining voltage;

(58)

‘reference incident’ means the maximum positive or negative power deviation occurring instantaneously between generation and demand in a synchronous area, considered in the FCR dimensioning;

(59)

‘rotor angle stability’ means the ability of synchronous machines to remain in synchronism under N-situation and after being subject to a disturbance;

(60)

‘security plan’ means the plan containing a risk assessment of critical TSO's assets to major physical- and cyber-threat scenarios with an assessment of the potential impacts;

(61)

‘stability limits’ means the permitted boundaries for the operation of the transmission system in terms of respecting the limits of voltage stability, rotor angle stability and frequency stability;

(62)

‘wide area state’ means the qualification of an alert state, emergency state or blackout state when there is a risk of propagation to the interconnected transmission systems;

(63)

‘system defence plan’ means the technical and organisational measures to be undertaken to prevent the propagation or deterioration of a disturbance in the transmission system, in order to avoid a wide area state disturbance and blackout state;

(64)

‘topology’ means the data concerning the connectivity of the different transmission system or distribution system elements in a substation and includes the electrical configuration and the position of circuit breakers and isolators;

(65)

‘transitory admissible overloads’ means the temporary overloads of transmission system elements which are allowed for a limited period and which do not cause physical damage to the transmission system elements as long as the defined duration and thresholds are respected;

(66)

‘virtual tie-line’ means an additional input of the controllers of the involved LFC areas that has the same effect as a measuring value of a physical interconnector and allows exchange of electric energy between the respective areas;

(67)

‘flexible alternating current transmission systems’ or ‘FACTS’ means equipment for the alternating current transmission of electric power, aiming at enhanced controllability and increased active power transfer capability;

(68)

‘adequacy’ means the ability of in-feeds into an area to meet the load in that area;

(69)

‘aggregated netted external schedule’ means a schedule representing the netted aggregation of all external TSO schedules and external commercial trade schedules between two scheduling areas or between a scheduling area and a group of other scheduling areas;

(70)

‘availability plan’ means the combination of all planned availability statuses of a relevant asset for a given time period;

(71)

‘availability status’ means the capability of a power generating module, grid element or demand facility to provide a service for a given time period, regardless of whether or not it is in operation;

(72)

‘close to real-time’ means the time lapse of not more than 15 minutes between the last intraday gate closure and real-time;

(73)

‘consumption schedule’ means a schedule representing the consumption of a demand facility or of a group of demand facilities;

(74)

‘ENTSO for Electricity operational planning data environment’ means the set of application programs and equipment developed in order to allow the storage, exchange and management of the data used for operational planning processes between TSOs;

(75)

‘external commercial trade schedule’ means a schedule representing the commercial exchange of electricity between market participants in different scheduling areas;

(76)

‘external TSO schedule’ means a schedule representing the exchange of electricity between TSOs in different scheduling areas;

(77)

‘forced outage’ means the unplanned removal from service of a relevant asset for any urgent reason that is not under the operational control of the operator of the concerned relevant asset;

(78)

‘generation schedule’ means a schedule representing the electricity generation of a power generating module or of a group of power generating modules;

(79)

‘internal commercial trade schedule’ means a schedule representing the commercial exchange of electricity within a scheduling area between different market participants;

(80)

‘internal relevant asset’ means a relevant asset which is part of a TSO's control area or a relevant asset located in a distribution system, including a closed distribution system, which is connected directly or indirectly to that TSO's control area;

(81)

‘netted area AC position’ means the netted aggregation of all AC external schedules of an area;

(82)

‘outage coordination region’ means a combination of control areas for which TSOs define procedures to monitor and where necessary coordinate the availability status of relevant assets in all time-frames;

(83)

‘relevant demand facility’ means a demand facility which participates in the outage coordination and the availability status of which influences cross-border operational security;

(84)

‘relevant asset’ means any relevant demand facility, relevant power generating module, or relevant grid element partaking in the outage coordination;

(85)

‘relevant grid element’ means any component of a transmission system, including interconnectors, or of a distribution system, including a closed distribution system, such as a single line, a single circuit, a single transformer, a single phase-shifting transformer, or a voltage compensation installation, which participates in the outage coordination and the availability status of which influences cross-border operational security;

(86)

‘outage planning incompatibility’ means the state in which a combination of the availability status of one or more relevant grid elements, relevant power generating modules, and/or relevant demand facilities and the best estimate of the forecasted electricity grid situation leads to violation of operational security limits taking into account remedial actions without costs which are at the TSO's disposal;

(87)

‘outage planning agent’ means an entity with the task of planning the availability status of a relevant power generating module, a relevant demand facility or a relevant grid element;

(88)

‘relevant power generating module’ means a power generating module which participates in the outage coordination and the availability status of which influences cross-border operational security;

(89)

‘regional security coordinator’ (‘RSC’) means the entity or entities, owned or controlled by TSOs, in one or more capacity calculation regions performing tasks related to TSO regional coordination;

(90)

‘scheduling agent’ means the entity or entities with the task of providing schedules from market participants to TSOs, or where applicable third parties;

(91)

‘scheduling area’ means an area within which the TSOs' obligations regarding scheduling apply due to operational or organisational needs;

(92)

‘week-ahead’ means the week prior to the calendar week of operation;

(93)

‘year-ahead’ means the year prior to the calendar year of operation;

(94)

‘affected TSO’ means a TSO for which information on the exchange of reserves and/or sharing of reserves and/or imbalance netting process and/or cross-border activation process is needed for the analysis and maintenance of operational security;

(95)

‘reserve capacity’ means the amount of FCR, FRR or RR that needs to be available to the TSO;

(96)

‘exchange of reserves’ means the possibility of a TSO to access reserve capacity connected to another LFC area, LFC block, or synchronous area to fulfil its reserve requirements resulting from its own reserve dimensioning process of either FCR, FRR or RR and where that reserve capacity is exclusively for that TSO, and is not taken into account by any other TSO to fulfil its reserve requirements resulting from their respective reserve dimensioning processes;

(97)

‘sharing of reserves’ means a mechanism in which more than one TSO takes the same reserve capacity, being FCR, FRR or RR, into account to fulfil their respective reserve requirements resulting from their reserve dimensioning processes;

(98)

‘alert state trigger time’ means the time before alert state becomes active;

(99)

‘automatic FRR’ means FRR that can be activated by an automatic control device;

(100)

‘automatic FRR activation delay’ means the period of time between the setting of a new setpoint value by the frequency restoration controller and the start of physical automatic FRR delivery;

(101)

‘automatic FRR full activation time’ means the time period between the setting of a new setpoint value by the frequency restoration controller and the corresponding activation or deactivation of automatic FRR;

(102)

‘average FRCE data’ means the set of data consisting of the average value of the recorded instantaneous FRCE of a LFC area or a LFC block within a given measured period time;

(103)

‘control capability providing TSO’ means the TSO that shall trigger the activation of its reserve capacity for a control capability receiving TSO under the conditions of an agreement for sharing reserves;

(104)

‘control capability receiving TSO’ means the TSO calculating reserve capacity by taking into account reserve capacity which is accessible through a control capability providing TSO under the conditions of an agreement for sharing reserves;

(105)

‘criteria application process’ means the process of calculating the target parameters for the synchronous area, the LFC block and the LFC area based on the data obtained in the data collection and delivery process;

(106)

‘data collection and delivery process’ means the process of collection of the set of data necessary in order to perform the frequency quality evaluation criteria;

(107)

‘cross-border FRR activation process’ means a process agreed between the TSOs participating in the process that allows for activation of FRR connected in a different LFC area by correcting the input of the involved FRPs accordingly;

(108)

‘cross-border RR activation process’ means a process agreed between the TSOs participating in the process that allows for activation of RR connected in a different LFC area by correcting the input of the involved RRP accordingly;

(109)

‘dimensioning incident’ means the highest expected instantaneously occurring active power imbalance within a LFC block in both positive and negative direction;

(110)

‘electrical time deviation’ means the time discrepancy between synchronous time and coordinated universal time (‘UTC’);

(111)

‘FCR full activation frequency deviation’ means the rated value of frequency deviation at which the FCR in a synchronous area is fully activated;

(112)

‘FCR full activation time’ means the time period between the occurrence of the reference incident and the corresponding full activation of the FCR;

(113)

‘FCR obligation’ means the part of all of the FCR that falls under the responsibility of a TSO;

(114)

‘frequency containment process’ or ‘FCP’ means a process that aims at stabilising the system frequency by compensating imbalances by means of appropriate reserves;

(115)

‘frequency coupling process’ means a process agreed between all TSOs of two synchronous areas that allows linking the activation of FCR by an adaptation of HVDC flows between the synchronous areas;

(116)

‘frequency quality defining parameter’ means the main system frequency variables that define the principles of frequency quality;

(117)

‘frequency quality target parameter’ means the main system frequency target on which the behaviour of FCR, FRR and RR activation processes is evaluated in normal state;

(118)

‘frequency quality evaluation criteria’ means a set of calculations using system frequency measurements that allows the evaluation of the quality of the system frequency against the frequency quality target parameters;

(119)

‘frequency quality evaluation data’ means the set of data that allows the calculation of the frequency quality evaluation criteria;

(120)

‘frequency recovery range’ means the system frequency range to which the system frequency is expected to return in the GB and IE/NI synchronous areas, after the occurrence of an imbalance equal to or smaller than the reference incident, within the time to recover frequency;

(121)

‘time to recover frequency’ means, for the synchronous areas GB and IE/NI, the maximum expected time after the occurrence of an imbalance smaller than or equal to the reference incident in which the system frequency returns to the maximum steady state frequency deviation;

(122)

‘frequency restoration range’ means the system frequency range to which the system frequency is expected to return in the GB, IE/NI and Nordic synchronous areas, after the occurrence of an imbalance equal to or smaller than the reference incident within the time to restore frequency;

(123)

‘FRCE target parameters’ means the main target LFC block variables on the basis of which the dimensioning criteria for FRR and RR of the LFC block are determined and evaluated and which are used to reflect the LFC block behaviour in normal operation;

(124)

‘frequency restoration power interchange’ means the power which is interchanged between LFC areas within the cross-border FRR activation process;

(125)

‘frequency setpoint’ means the frequency target value used in the FRP, defined as the sum of the nominal system frequency and an offset value needed to reduce an electrical time deviation;

(126)

‘FRR availability requirements’ means a set of requirements defined by the TSOs of a LFC block regarding the availability of FRR;

(127)

‘FRR dimensioning rules’ means the specifications of the FRR dimensioning process of a LFC block;

(128)

‘imbalance netting process’ means a process agreed between TSOs that allows avoiding the simultaneous activation of FRR in opposite directions, taking into account the respective FRCEs as well as the activated FRR and by correcting the input of the involved FRPs accordingly;

(129)

‘imbalance netting power interchange’ means the power which is interchanged between LFC areas within the imbalance netting process;

(130)

‘initial FCR obligation’ means the amount of FCR allocated to a TSO on the basis of a sharing key;

(131)

‘instantaneous frequency data’ means a set of data measurements of the overall system frequency for the synchronous area with a measurement period equal to or shorter than one second used for system frequency quality evaluation purposes;

(132)

‘instantaneous frequency deviation’ means a set of data measurements of the overall system frequency deviations for the synchronous area with a measurement period equal to or shorter than one second used for system frequency quality evaluation purposes;

(133)

‘instantaneous FRCE data’ means a set of data of the FRCE of a LFC block with a measurement period equal to or shorter than 10 seconds used for system frequency quality evaluation purposes;

(134)

‘level 1 FRCE range’ means the first range used for system frequency quality evaluation purposes on LFC block level within which the FRCE should be kept for a specified percentage of the time;

(135)

‘level 2 FRCE range’ means the second range used for system frequency quality evaluation purposes on LFC block level within which the FRCE should be kept for a specified percentage of the time;

(136)

‘LFC block operational agreement’ means a multi-party agreement between all TSOs of a LFC block if the LFC block is operated by more than one TSO and means a LFC block operational methodology to be adopted unilaterally by the relevant TSO if the LFC block is operated by only one TSO;

(137)

‘replacement power interchange’ means the power which is interchanged between LFC areas within the cross-border RR activation process;

(138)

‘LFC block imbalances’ means the sum of the FRCE, FRR activation and RR activation within the LFC block and the imbalance netting power interchange, the frequency restoration power interchange and the replacement power interchange of this LFC block with other LFC blocks;

(139)

‘LFC block monitor’ means a TSO responsible for collecting the frequency quality evaluation criteria data and applying the frequency quality evaluation criteria for the LFC block;

(140)

‘load-frequency control structure’ means the basic structure considering all relevant aspects of load-frequency control in particular concerning respective responsibilities and obligations as well as types and purposes of active power reserves;

(141)

‘process responsibility structure’ means the structure to determine responsibilities and obligations with respect to active power reserves based on the control structure of the synchronous area;

(142)

‘process activation structure’ means the structure to categorise the processes concerning the different types of active power reserves in terms of purpose and activation;

(143)

‘manual FRR full activation time’ means the time period between the setpoint change and the corresponding activation or deactivation of manual FRR;

(144)

‘maximum instantaneous frequency deviation’ means the maximum expected absolute value of an instantaneous frequency deviation after the occurrence of an imbalance equal to or smaller than the reference incident, beyond which emergency measures are activated;

(145)

‘monitoring area’ means a part of the synchronous area or the entire synchronous area, physically demarcated by points of measurement at interconnectors to other monitoring areas, operated by one or more TSOs fulfilling the obligations of a monitoring area;

(146)

‘prequalification’ means the process to verify the compliance of a reserve providing unit or a reserve providing group with the requirements set by the TSO;

(147)

‘ramping period’ means a period of time defined by a fixed starting point and a length of time during which the input and/or output of active power will be increased or decreased;

(148)

‘reserve instructing TSO’ means the TSO responsible for the instruction of the reserve providing unit or the reserve providing group to activate FRR and/or RR;

(149)

‘reserve connecting DSO’ means the DSO responsible for the distribution network to which a reserve providing unit or reserve providing group, providing reserves to a TSO, is connected;

(150)

‘reserve connecting TSO’ means the TSO responsible for the monitoring area to which a reserve providing unit or reserve providing group is connected;

(151)

‘reserve receiving TSO’ means the TSO involved in an exchange with a reserve connecting TSO and/or a reserve providing unit or a reserve providing group connected to another monitoring or LFC area;

(152)

‘reserve replacement process’ or ‘RRP’ means a process to restore the activated FRR and, additionally for GB and IE/NI, to restore the activated FCR;

(153)

‘RR availability requirements’ means a set of requirements defined by the TSOs of a LFC block regarding the availability of RR;

(154)

‘RR dimensioning rules’ means the specifications of the RR dimensioning process of a LFC block;

(155)

‘standard frequency range’ means a defined symmetrical interval around the nominal frequency within which the system frequency of a synchronous area is supposed to be operated;

(156)

‘standard frequency deviation’ means the absolute value of the frequency deviation that limits the standard frequency range;

(157)

‘steady state frequency deviation’ means the absolute value of frequency deviation after occurrence of an imbalance, once the system frequency has been stabilised;

(158)

‘synchronous area monitor’ means a TSO responsible for collecting the frequency quality evaluation criteria data and applying the frequency quality evaluation criteria for the synchronous area;

(159)

‘time control process’ means a process for time control, where time control is a control action carried out to return the electrical time deviation between synchronous time and UTC time to zero.

(a)

determining common operational security requirements and principles;

(b)

determining common interconnected system operational planning principles;

(c)

determining common load-frequency control processes and control structures;

(d)

ensuring the conditions for maintaining operational security throughout the Union;

(e)

ensuring the conditions for maintaining a frequency quality level of all synchronous areas throughout the Union;

(f)

promoting the coordination of system operation and operational planning;

(g)

ensuring and enhancing the transparency and reliability of information on transmission system operation;

(h)

contributing to the efficient operation and development of the electricity transmission system and electricity sector in the Union.

(a)

apply the principles of proportionality and non-discrimination;

(b)

ensure transparency;

(c)

apply the principle of optimisation between the highest overall efficiency and lowest total costs for all parties involved;

(d)

ensure TSOs make use of market-based mechanisms as far as possible, to ensure network security and stability;

(e)

respect the responsibility assigned to the relevant TSO in order to ensure system security, including as required by national legislation;

(f)

consult with relevant DSOs and take account of potential impacts on their system; and

(g)

take into consideration agreed European standards and technical specifications.

(a)

TSOs representing at least 55 % of the Member States; and

(b)

TSOs representing Member States comprising at least 65 % of the population of the Union.

(a)

TSOs representing at least 72 % of the Member States concerned; and

(b)

TSOs representing Member States comprising at least 65 % of the population of the concerned region.

(a)

key organizational requirements, roles and responsibilities in relation to data exchange related to operational security in accordance with Article 40(6);

(b)

methodology for building the common grid models in accordance with Article 67(1) and Article 70;

(c)

methodology for coordinating operational security analysis in accordance with Article 75.

(a)

methodology for each synchronous area for the definition of minimum inertia in accordance with Article 39(3)(b);

(b)

common provisions for each capacity calculation region for regional operational security coordination in accordance with Article 76;

(c)

methodology, at least per synchronous area, for assessing the relevance of assets for outage coordination in accordance with Article 84;

(d)

methodologies, conditions and values included in the synchronous area operational agreements in Article 118 concerning:

(e)

methodologies and conditions included in the LFC block operational agreements in Article 119, concerning:

(f)

mitigation measures per synchronous area or LFC block in accordance with Article 138;

(g)

common proposal per synchronous area for the determination of LFC blocks in accordance with Article 141(2).

(a)

for the GB and IE/NI synchronous areas, the proposal of each TSO specifying the level of demand loss at which the transmission system shall be in the blackout state;

(b)

scope of data exchange with DSOs and significant grid users in accordance with Article 40(5);

(c)

additional requirements for FCR providing groups in accordance with Article 154(3);

(d)

exclusion of FCR providing groups from the provision of FCR in accordance with Article 154(4);

(e)

for the CE and Nordic synchronous areas, the proposal concerning the interim minimum activation period to be ensured by FCR providers as proposed by the TSO in accordance with Article 156(9);

(f)

FRR technical requirements defined by the TSO in accordance with Article 158(3);

(g)

rejection of FRR providing groups from the provision of FRR in accordance with Article 159(7);

(h)

technical requirements for the connection of RR providing units and RR providing groups defined by the TSO in accordance with Article 161(3); and

(i)

rejection of RR providing groups from the provision of RR in accordance with Article 162(6).

(a)

enhancements of network operation tools in accordance with Article 55(1)(e);

(b)

FRCE target parameters in accordance with Article 128;

(c)

ramping restrictions on synchronous area level in accordance with Article 137(1);

(d)

ramping restrictions on LFC block level in accordance with Article 137(3);

(e)

measures taken in the alert state due to there being insufficient active power reserves in accordance with Article 152(11); and

(f)

request of the reserve connecting TSO to an FCR provider to make the information available in real time in accordance with Article 154(11).

(a)

operational security indicators in accordance with Article 15;

(b)

load-frequency control in accordance with Article 16;

(c)

regional coordination assessment in accordance with Article 17;

(d)

identification of any divergences in the national implementation of this Regulation for the terms and conditions or methodologies listed in Article 6(3);

(e)

identification of any additional improvements of tools and services in accordance with subparagraphs (a) and (b) of Article 55, beyond the improvements identified by the TSOs in accordance with Article 55(e);

(f)

identification of any necessary improvements in the annual report on incidents classification scale in accordance with Article 15, which are necessary in order to support sustainable and long-term operational security; and

(g)

identification of any difficulties concerning cooperation on secure system operation with third country TSOs.

(a)

number of tripped transmission system elements per year per TSO;

(b)

number of tripped power generation facilities per year per TSO;

(c)

energy not supplied per year due to unscheduled disconnection of demand facilities per TSO;

(d)

time duration and number of instances of being in the alert and emergency states per TSO;

(e)

time duration and number of events within which there was a lack of reserves identified per TSO;

(f)

time duration and number of voltage deviations exceeding the ranges from Tables 1 and 2 of Annex II per TSO;

(g)

number of minutes outside the standard frequency range and number of minutes outside the 50 % of maximum steady state frequency deviation per synchronous area;

(h)

number of system-split separations or local blackout states; and

(i)

number of blackouts involving two or more TSOs.

(a)

number of events in which an incident contained in the contingency list led to a degradation of the system operation state;

(b)

number of the events referred to in point (a) in which a degradation of system operation conditions occurred as a result of unexpected discrepancies from load or generation forecasts;

(c)

number of events in which there was a degradation in system operation conditions due to an exceptional contingency;

(d)

number of the events referred to in point (c) in which a degradation of system operation conditions occurred as a result of unexpected discrepancies from load or generation forecasts; and

(e)

number of events leading to a degradation in system operation conditions due to lack of active power reserves.

(a)

the identification of the LFC blocks, LFC areas and monitoring areas in the Member State;

(b)

the identification of LFC blocks that are not in the Member State and that contain LFC areas and monitoring areas that are in the Member State;

(c)

the identification of the synchronous areas each Member State belongs to;

(d)

the data related to the frequency quality evaluation criteria for each synchronous area and each LFC block in subparagraphs (a), (b) and (c) covering each month of at least 2 previous calendar years;

(e)

the FCR obligation and the initial FCR obligation of each TSO operating within the Member State covering each month of at least 2 previous calendar years; and

(f)

a description and date of implementation of any mitigation measures and ramping requirements to alleviate deterministic frequency deviations taken in the previous calendar year in accordance with Articles 137 and 138, in which TSOs of the Member State were involved.

(a)

the number of events, average duration and reasons for the failure to fulfil its functions;

(b)

the statistics regarding constraints, including their duration, location and number of occurrences together with the associated remedial actions activated and their cost in case they have been incurred;

(c)

the number of instances where TSOs refuse to implement the remedial actions recommended by the regional security coordinator and the reasons thereof;

(d)

the number of outage incompatibilities detected in accordance with Article 80; and

(e)

a description of the cases where the lack of regional adequacy has been assessed and a description of mitigation actions set in place.