Η ΡΑΑΕΥ θέτει σήμερα σε δημόσια διαβούλευση την Διαδικασία Επιβεβαίωσης Συμμόρφωσης Μονάδων Ηλεκτροπαραγωγής κατά RfG, η οποία βασίστηκε στην εισήγηση του Διαχειριστή του ΕΣΜΗΕ, όπως υποβλήθηκε στην Α

Version 1.0 1 RfG compliance verification for Power generating modules types A, B, C and D Contents Scope 3

1. Definitions 3 1.1 1.2 Abbreviations Definitions 3 4
2. Operational Notification Procedure for New Power Generating Modules 6 2.1 2.2 2.3 2.4 2.5 2.6 2.7 2.8 RfG type definition RfG Operational Notification Procedure Prototype generating units in PPM Type A documents Type B – D main documents Type B – D technical data Type B – D test reports Type B – D simulation model 6 8 14 16 16 17 17 18
3. Grid connection of generators (RfG) 20 3.1 RfG compliance 3.2 RfG compliance testing and simulation for PGM 3.2.1 Requirement: LFSM-O 3.2.2 Requirement: LFSM-U 3.2.3 FSM 3.2.4 Frequency restoration 3.2.5 Black start capability (if applicable) 3.2.6 Tripping to houseload 3.2.7 Frequency range and Voltage range 3.2.8 Reactive power capability 3.2.9 Active power controllability 3.2.10 Voltage control mode 3.2.11 Reactive power control mode 3.2.12 Power factor control mode 3.2.13 Island operation (if applicable) 3.2.14 FRT (profiles different B/C and D) 3.2.15 Post fault active power recovery 3.2.16 Power Oscillation Damping Control (POD) (if applicable) 3.2.17 Fast fault current injection 20 24 24 29 34 40 42 45 47 52 72 74 78 80 83 85 94 96 107 Annex: Requirements for (O)PPM EMT Simulation models Annex: Requirements for RMS Simulation models 110 118 2 RfG compliance verification for Power generating modules types A, B, C and D Scope It is a requirement of each of the Connection Network Codes (CNCs) that equipment, affected by the connection code and connected to the system is compliant with the technical requirements forming part of the CNCs at the time that such equipment is first connected and that it then continues to be compliant throughout its life. This document describes the Compliance Verification Procedure for connection of new Power-Generating Modules (EU regulation 2016/631: NC RfG). The NC RfG has been implemented in the RAE Decision 1165/

, available in the Greek language only.

1. Definitions 1.1 Abbreviations The following list of abbreviations gives an overview of the most common abbreviations in this document. For further explanation of terminology used, we refer to the relevant regulations and codes. Abbreviation Description CA Connection Agreement CNC Connection Network Code DSO Distribution System Operator CDSO Closed Distribution System Operator DR Demand Response EqC Equipment Certificate EON Energisation Operational Notification ION Interim Operational Notification FON Final Operational Notification LON Limited Operational Notification NC RfG Network Code for Requirements for Grid Connection Applicable to all Generators OPPM Offshore Power Park Module PGFO Power-Generation Facility Owner PGM Power-Generating Module PGMD Power-Generating Module Document GU Generating Unit PPM Power Park Module RSO Relevant System Operator SPGM Synchronous Power Generating Module TSO Transmission System Operator 3 RfG compliance verification for Power generating modules types A, B, C and D 1.2 Definitions The following list of definitions gives an overview of the most common terms in this document. For further explanation of terminology used, we refer to the relevant regulations and codes. Definitions from European Network Codes: • Connection agreement: a contract between the relevant system operator and either the power-generating facility owner, demand facility owner, distribution system operator or HVDC system owner, which includes the relevant site and specific technical requirements for the power-generating facility, demand facility, distribution system, distribution system connection or HVDC system • Connection Point: the interface at which the Power-Generating Module, demand facility, distribution system or HVDC system is connected to a transmission system, offshore network, distribution system, including closed distribution systems, or HVDC system, as identified in the connection agreement • Connection Capacity: the transmission capacity of the connection as stated in the Connection Agreement • Energisation Operational Notification (EON): a notification issued by the relevant system operator to a power-generating facility owner, demand facility owner, distribution system operator or HVDC system owner prior to energisation of its internal network • Interim Operational Notification (ION): a notification issued by the relevant system operator to a power- generating facility owner, demand facility owner, distribution system operator or HVDC system owner which allows them to operate respectively a power-generating module, demand facility, distribution system or HVDC system by using the grid connection for a limited period of time and to initiate compliance tests to ensure compliance with the relevant specifications and requirements • Final Operational Notification (FON): a notification issued by the relevant system operator to a power- generating facility owner, demand facility owner, distribution system operator or HVDC system owner who complies with the relevant specifications and requirements, allowing them to operate respectively a power- generating module, demand facility, distribution system or HVDC system by using the grid connection • Limited Operational Notification (LON): a notification issued by the relevant system operator to a power- generating facility owner, demand facility owner, distribution system operator or HVDC system owner who had previously attained FON status but is temporarily subject to either a significant modification or loss of capability resulting in non-compliance with the relevant specifications and requirements • Installation document: means a simple structured document containing information about a type A Power-Generating Module or a demand unit, with demand response connected below 1000V, and confirming its compliance with the specified requirements • Main Generating Plant: one or more of the principal items of equipment required to convert the primary source of energy into electricity; • Maximum Capacity (Pmax): the maximum continuous active power which a PowerGenerating Module can produce, less any demand associated solely with facilitating the operation of that Power-Generating Module and not fed into the network as specified in the connection agreement or as agreed between the relevant system operator and the Power-Generating Facility Owner • Minimum Regulating Level: the minimum active power, as specified in the connection agreement or as agreed between the relevant system operator and the Power-Generating Facility Owner, down to which the power- generating module can control active power • Power-Generating Module (PGM): either a synchronous Power-Generating Module or a Power Park Module • Synchronous Power-Generating Module (SPGM): an indivisible set of installations which can generate electrical energy such that the frequency of the generated voltage, the generator speed and the frequency of network voltage are in a constant ratio and thus in synchronism • Power Park Module (PPM): a unit or ensemble of units generating electricity, which is either non-synchronously connected to the network or connected through power electronics, and that also has a single Connection Point to a transmission system, distribution system including closed distribution system or HVDC system 4 RfG compliance verification for Power generating modules types A, B, C and D • Offshore Power Park Module (OPPM): a Power Park Module located offshore with an offshore Connection Point • Power-Generating Facility: a facility that converts primary energy into electrical energy and which consists of one or more Power-Generating Modules connected to a network at one or more Connection Points • Power-Generating Facility Owner (PGFO): a natural or legal entity owning a Power- Generating Facility • Power-Generating Module Document (PGMD): a document provided by the PowerGenerating Facility Owner to the relevant system operator for a type B or C PowerGenerating Module which confirms that the power- generating module's compliance with the technical criteria set out in this Regulation has been demonstrated and provides the necessary data and statements, including a statement of compliance • Relevant TSO: the TSO in whose control area a Power-Generating Module, a demand facility, a distribution system or a HVDC system is or will be connected to the network at any voltage level; in Greece the relevant TSO is IPTO (ADMIE) • Relevant System Operator (RSO): the transmission system operator or distribution system operator to whose system a Power-Generating Module, demand facility, distribution system or HVDC system is or will be connected • Statement of compliance: means a document provided by the Power-Generating Facility Owner, demand facility owner, distribution system operator or HVDC system owner to the system operator stating the current status of compliance with the relevant specifications and requirements; Other definitions and clarifications used in this document: • Connected party: either a power-generating facility owner, demand facility owner, distribution system operator or HVDC system owner • Generating Unit (GU): an individual unit of a Power Park Module converting energy into electricity, e.g. a single wind turbine or one or more inverters with solar panels • Dead time (Td): the time from the frequency change event until the beginning of the response • Step response time (Tsr): the time from the change event until the instant the response reaches the tolerance range for the first time • Settling time (Ts): the time from the change event until the instant from where on the corresponding response remains within the tolerance band of the set value • Tolerance: permitted deviation between the declared value of the quantity and the measured value. (IEC IEV reference 411-36-19) • Voltage control mode deadband: an interval used intentionally to make the voltage control unresponsive 5 RfG compliance verification for Power generating modules types A, B, C and D
2. Operational Notification Procedure for New Power Generating Modules 2.1 RfG type definition The EU regulation 2016/631 (RfG) defines four types of generators A, B, C and D in Article 5 “Determination of significance”, as described in chapter
3. The fundamental rationale for creating the type definition is that the size of a Power-Generating Module impacts the stability of the grid – the larger one single PGM the more impact. The impact of a large amount of small PGM's (e.g. on frequency stability) is reflected in the requirements. All requirements in the said regulation are cumulative, with some exemptions, sorted into the four types. The compliance testing and simulation of Power-Generating Modules follow the same basic principle. Type identification yes no Pmax < 800 W ? yes Not RfG no Pmax < 1 MW ? yes Type A Equipment Certificate Type B PGMD Type C PGMD Type D EON, ION, FON no Pmax < 20 MW ? yes no Pmax < 75 MW ? yes no Synchronous connection ? SPGM Offshore ? OPPM PPM Figure 3.1 RfG Type identification The following definitions are taken from RfG article 2: • SPGM: Synchronous Power-Generating Module means an indivisible set of installations which can generate electrical energy such that the frequency of the generated voltage, the generator speed and the frequency of network voltage are in a constant ratio and thus in synchronism • PPM: Power Park Module means a unit or ensemble of units generating electricity, which is either non-synchronously connected to the network or connected through power electronics, and that also has a single Connection Point to a transmission system, distribution system including closed distribution system or HVDC system • OPPM: Offshore Power Park module means an AC connected Power Park Module located offshore with an offshore Connection Point. A (power generating) unit is a single generating installation converting energy into electricity. A generating unit in an SPGM may be a gas turbine installation. A generating unit in a PPM may be a single wind turbine, a single inverter with connected photovoltaic cells (PV). 6 RfG compliance verification for Power generating modules types A, B, C and D To these definitions, a conventional power plant is treated as an SPGM. A wind power plant and a PV solar power plant are treated as a PPM. Also a wind power plant with doubly fed induction generators (DFIG) is a PPM, since the generator speed and the frequency of network voltage are not in a constant ratio (see: RfG, article 2, definition 9). An offshore AC connected offshore wind power plant is treated as an OPPM. However, an onshore AC connected offshore wind power plant is treated as a PPM. An offshore power plant that is connected through an HVDCsystem is treated as a DC connected Power Park Module in NC HVDC. Referring to the definitions (paragraph 2.2 of this document) the logical hierarchy is: • Facility o Power-Generating Module (may be Synchronous Power-Generating Module or PPM) ▪ Generating Unit (e.g. Gas turbine, Wind Turbine, PV inverter) The significance of power-generating modules should be based on their size and their effect on the overall system. • Synchronous machines should be classed on the machine size and include all the components of a generating facility that normally run indivisibly, such as separate alternators driven by the separate gas and steam turbines of a single combined-cycle gas turbine installation. For a facility including several such combined-cycle gas turbine installations, each should be assessed on its size, and not on the whole capacity of the facility. • Non- synchronously connected generating units, where they are collected together to form an economic unit and where they have a single connection point should be assessed on their aggregated capacity. Transmission/Distribution Network and connecting bus bar Connection Point Connection Point G W PV GU GU GU's PGM: SPGM PGM: PPM Facility Figure 3.2 Facility, PGM, SPGM and PPM 7 RfG compliance verification for Power generating modules types A, B, C and D 2.2 RfG Operational Notification Procedure This paragraph sets out the requirements for new generators to demonstrate their compliance with the detailed technical specifications for generators, as part of their connection process. The operational notification process sets out the steps through which demonstration of these requirements can be achieved including steady state and dynamic performance. The operational notification process depends on the size and the connection voltage of the Power- Generating Module and thus on their impact on the system. Synchronous machines should be classed on the machine size and include all the components of a generating facility that normally run indivisibly, such as separate alternators driven by the separate gas and steam turbines of a single combined-cycle gas turbine installation. For a facility including several such combined-cycle gas turbine installations, each should be assessed on its size, and not on the whole capacity of the facility. Non- synchronously connected Generating Units, where they are collected together to form an economic unit and where they have a single Connection Point (e.g. wind turbine parks and solar PV parks) should be assessed on their aggregated capacity. The on-shore Power-Generating Modules are subdivided into four types A to D. The operational notification procedure is specified for each type A-D of Power-Generating Module and is broadly as follows: • Type A Power-Generating Modules have a Connection Point below 110 kV and Maximum Capacity between 0.8 kW and 1 MW (not inclusive); • Type B Power-Generating Modules have a Connection Point below 110 kV and Maximum Capacity between 1 MW and 20 MW (not inclusive); • Type C Power-Generating Modules have a Connection Point below 110 kV and Maximum Capacity between 20 MW and 75 MW (not inclusive); • Type D Power-Generating Modules have a Connection Point at 110 kV or above. A Power-Generating Modules is also of type D if its Connection Point is below 110 kV and its Maximum Capacity is at or above 75 MW. For type A an installation document shall include the equipment certificates and other additional information such as source (e.g. PV) and kW rating. Types B, C and D need significant site-specific supporting compliance evidence. For types B and C a Power Generating Module Document (PGMD) is to be provided by the PowerGenerating Facility Owner (PGFO) to the Relevant System Operator (RSO) for each PowerGenerating Module, including a statement of compliance. For type D generators the process is more extensive, due to their scale and potential impact on the system, the extent of the services and technical capabilities that they should be able to provide or demonstrate, and their capability to engage in more detailed testing. Proof of evidence can be provided e.g. by a project certificate containing simulations with validated electrical simulation models. These project certificates should be based on type certificates or/and equipment certificates. Operational notification procedure for PGM Type A For each Power-Generating Module the Power Generating Facility Owner (PGFO) provides an installation document to the RSO, see paragraph 3.
4. Any equipment forming part of the installation is to be covered by Equipment Certificates (EqCs) issued by an authorised certifier. Operational notification procedure for PGM Type B, C A Power Generating Module Document (PGMD) is to be provided by the Power Generating Facility Owner (PGFO) to the Relevant System Operator (RSO) for each Power-Generating Module, including a statement of compliance. The PGMD contains the information that demonstrates compliance with the technical criteria. It shall include test reports and simulation studies reports. The test reports are required by RfG chapters 2-4 of title IV and they include use of actual measured values during testing. The simulation studies reports are required by RfG chapters 5-7 of title IV and they demonstrate steady state and dynamic performance. The PGFO of a PGM type B can, instead of conducting tests, prove compliance with the relevant requirements by means of calculations, based on the, proven by certificates or test reports, properties of the applied components and/or generating units. If a PGM (park) controller is applied, the proper functioning of the park controller in combination with the applied generating units shall be demonstrated. In the case that a prototype generating unit is used in a PPM, see paragraph 3.
5. 8 RfG compliance verification for Power generating modules types A, B, C and D Procedure The PGMD is published on the website of RSO see annex: For each Power-Generating Module within the Power-Generating Facility, the Power Generating Facility Owner (PGFO) provides a separate independent PGMD to the relevant system operator (RSO), containing the following documents and reports (RfG article 32): • Evidence of an agreement on the protection and control settings relevant to the Connection Point; • Itemised statement of compliance; • Detailed technical data of the PGM as specified by the RSO (i.e. structural data, planning and forecasting data and real time data); • Equipment certificates; • For Type C Power-Generating Modules, simulation models (see paragraph 3.8); • Compliance test reports demonstrating steady-state and dynamic performance; • Studies demonstrating steady-state and dynamic performance. Additional information: • Signed connection agreement; • Protection and settings document (co-ordination with RSO substation protection. The connected party must submit a detailed plan regarding the security resources to the network operator. After assessment and, if necessary, adjustment, the network operator will make one certified copy available to the connected party or his installer; • Signal exchange list (agreed between RSO and PGFO); • Report providing the power quality compliance (according to IEC 61400-21-1:2019); • For type C: Conformity that power quality measurements can and will be performed during the commissioning; • Actual planning information (all relevant planning of notification process information shall be delivered by the PGFO); • An overall testing and commissioning plan. Planning • The PGFO requests connection for a PGM type B or C; this can be on a new connection point or on an existing connection point; • The RSO checks the network capacity; • The RSO sends links to PGMD and Power-Generating Modules compliance verification document to the PGFO; • The RSO informs the PGFO of the relevant network data; the PGFO needs this data to prepare the tests and execute the simulations; • The PGFO hands over the detailed technical data, as specified in the PGMD; • The PGFO hands over a protection and settings document, as specified in the PGMD, a signal exchange list and an overall testing and commissioning plan; • The PGFO hands over the available Equipment Certificates as soon as possible; • The PGFO hands over the results of the simulation studies as soon as possible; • The RSO issues a notification to energise the substation and to connect the powergenerating facility for the purpose of construction and testing activities; • The PGFO hands over the actual planning information and the overall testing and commissioning plan; • Commissioning of the Generating Units of the PGM and the possible plant controller; • Execution of required tests, as specified in chapter 4; • Within a period of two months after energising of the substation and at least three months for PGM <5 MW and at least 6 months for PGM ≥ 5 MW before the desired completion date of the PGM, the PGFO shall submit a preliminary PGMD, accompanied with the preliminary statement of compliance, including reports of test procedures and simulation results; • Within a period of 6 months after the preliminary PGMD, the PGFO shall submit the final PGMD, accompanied with the final statement of compliance, including reports with results of tests and simulation results • In case of a wind or solar powered PPM and in case of a lack of primary solar or wind power due to seasonal influences and with the consequence that the required output power cannot be achieved, the tests shall be postponed until sufficient primary power is available; in this case, the PGFO shall submit a preliminary version of the PGMD at 9 RfG compliance verification for Power generating modules types A, B, C and D least three months before the desired commissioning of the PPM and the final version of the PGMD no later than three months after reaching the full installed PPM capacity; • Within a maximum of two months after receiving the statement of compliance of the Power Generating Facility Owner (PGFO), the RSO will respond; • If the assessment of the statement of compliance is positive, the RSO will accept the PGMD; • On acceptance of the complete and adequate PGMD, the RSO issues a final operational notification to the power-generating facility owner • If the RSO does not accept the PGMD, he will send the PGFO the reason for refusal, after which the PGFO will have the option to submit a new version of the PGMD within two months. Operational notification procedure for type D generators For type D the process is more extensive due to their scale and potential impact on the system, the extent of the services and technical capabilities that they should be able to provide or demonstrate, and their capability to engage in more detailed testing. The tests shall be carried out on the complete PGM describing its behaviour at the Connection Point, supplemented with type tests on single Generating Units if applicable or components. If a test cannot be carried out at the Connection Point, e.g., if the function does not exist at PGM control level, the on-site test shall be carried out for a representative sample of each GU type to be installed in the PGM. Alternatively, a single Generating Unit shall be tested and the concerning parameters of all other individual units shall be checked. Figure 3.3 illustrates the connection and commissioning process for a type D PGM. The steps are explained in the following paragraphs. Part of the process is the execution of tests and simulations. According to RfG Article 42

. The PGFO may use type test reports approved by an independent body or test report included within a certificate of a unit issued by an authorised certifier to demonstrate compliance of the PGM with the relevant requirements. In that case, the type test reports approved by an independent body or test report included within a certificate of a unit shall be provided to the RSO. In case of a prototype generating unit, no unit certificates or type test reports will be available on short notice. In that case, the documentation for demonstrating the compliance of a PPM with the technical criteria of the NC RfG and RAE Decision 1165/

can be based on a prototype confirmation, which is based on a manufacturers declaration and approved by an independent certification body. Within a period of two years after taking into service of the first prototype power generating unit in Greece, a prototype confirmation will be sufficient instead of the type test reports approved by an independent body or test report included within a certificate of a unit. The certification body confirms the existence of a significant technical development or innovation on the basis of a manufacturer's declaration. The certification body also verifies and states in the prototype confirmation that the prototype is principally able to comply with the requirements of the NC RfG and RAE Decision 1165/

. Manufacturer and independent certifying body have the responsibility that the documentation is correct. The prototype confirmation also mentions the expected date of the final type test reports. The generating unit prototype confirmation can be used by the PGFO to demonstrate compliance of the PPM in which the prototype is installed. After approval by the RSO, the PGFO receives a temporary operational notification to start operation. The documentation of the power generating unit specifications shall contain at least: • Electrical data (nominal and rated quantities); • Schematic overview circuit diagram of the power generating unit with all relevant components; • Operating ranges of the power generating unit: o Limits in quasi-static operation; o Reactive power adjustment range; o FRT limit curve; • Protection functions with setting ranges: o Disconnection protection; o Self-protection; • Active power control: o Power/frequency behaviour; o Active power gradient; • Reactive power control; • Fast fault current injection. The manufacturer declares that the prototype generating unit has been designed so that it is principally able to comply with the relevant requirements of the NC RfG and RAE Decision 1165/

. If a prototype confirmation is available based on requirements other than the RAE Decision 1165/

, this prototype confirmation will only be accepted as far as those requirements are equal or more stringent than the RAE Decision 1165/

. For those requirements which are less stringent than the requirements in the RAE Decision 1165/

, an additional statement will be required with the prototype confirmation. Within the period of two years, type test reports approved by an independent body or test report included within a certificate of a unit is required. If after this time period the PGFO is not 15 RfG compliance verification for Power generating modules types A, B, C and D able to hand over the type test reports approved by an independent body or test report included within a certificate of a unit and the resulting declaration of conformity to the relevant system operator (RSO), the RSO is entitled to require taking out of operation the concerned prototype generating units or to disconnect the PGM from the network. This principle, based on NC RfG article 3, will be included in a temporary operational notification for the PGM, issued by the RSO. After accepting the complete and adequate documentation for demonstrating the compliance of the PPM, including the type test reports approved by an independent body or test report included within a certificate of a unit, the extracts of the test reports and the resulting declaration of conformity with the NC RfG and RAE Decision 1165/

, the RSO shall issue the final operational notification to the power-generating facility owner. 2.4 Type A documents According to NC RfG article 30 the operational notification procedure for connection of each new type A power-generating module consists of submitting an installation document. The contents of the installation document are specified by the RSO. The contents are: • the location at which the connection is made; • the date of the connection; • manufacturer and type-identification; • the Maximum Capacity of the installation in kW; • the type of primary energy source (e.g. PV, Wind); • the classification of the Power-Generating Module if it is an emerging technology according to Title VI of the RfG; • capability for electricity storage; • reference to equipment certificates issued by an authorised certifier used for equipment that is in the site installation; • as regards equipment used, for which an equipment certificate has not been received, information shall be provided as directed by the relevant system operator; • the contact details of the Power-Generating Facility Owner and the installer and their signatures. The installation document refers to equipment certificates. The Power-Generating Facility Owner may rely upon equipment certificates. The equipment certificates describe the extent to which the relevant requirements are met. 2.5 Type B – D main documents For PGM type D and, as applicable, for types B and C, the Power Generating Facility Owner (PGFO) shall hand over to the RSO: • Results and details of physical tests • Results and details of simulations • Technical data • Statement of compliance • Actual planning of: o Energisation, First Generating Unit (in case of a (O)PPM), 20% of the Maximum Capacity of the (O)PPM, and full capacity o In case of type B or C PGM: Delivery of statement of compliance PGMD o In case of type D PGM: Delivery of statement of compliance EON, ION and FON o Delivery of documents on compliancy tests and simulations o Onsite tests In case of type B or C PGM: From the RSO to Power Generating Facility Owner (PGFO) • Reviews of simulations and test results (PGMD) • Declaration of acceptance of the PGMD (RfG Article 32

article 13

article 14

article 16 (PGM type D) and RfG article 25

article 25

(i.e. structural data, planning and forecasting data and real time data) shall be delivered for EON/ION, as a result of that: • For type B PGM connected to the transmission-connected closed distribution system: o the simulation model should be adequate to simulate the load flow and shortcircuit behaviour and the LFSM-O function as referred to in RfG articles 51

article: 13

Article 13

Article 13

article 13, the LFSM-O activates above a frequency threshold of 50.2 Hz. The droop shall be set to 5%. At 5% droop a frequency change of 200 mHz above the threshold should cause a change of active power equal to 8% of Pref at the start of the test. This corresponds to 40% Pref per Hz. The test should be performed with curtailed power so that Pref is the same between 50 Hz and 50.2 Hz. In this way it is assured that the changes in active power is only due to frequency variations and not due to primary resource changes. For the performance of the test, there should be no frequency response between 49.8 Hz and 50.2 Hz , so that the provision of primary and secondary control power shall be deactivated. Operating point: • The tests shall be carried out for an initial operating point between the PGM’s Minimum Regulating Level and its Maximum Capacity from which it will be possible to test at least 10% active power decrease. The operating point will be determined in consultation with the RSO. For SPGM the operating point will be 70% of the Maximum Capacity. For a PPM the operating point shall be minimum 60% of the Maximum Capacity. A frequency step response test will be carried out according to the following sequences: Starting frequency (Hz) To frequency (Hz) Power change per step 50.0 50.2 0% 50.2 50.5 -12% 50.5 51.0 -20% 51.0 51.5 -20% 51.5 51.0 +20% 51.0 50.5 +20% 50.5 50.2 +12% 50.2 50.0 0% Refer to figure 4.5. 26 RfG compliance verification for Power generating modules types A, B, C and D The power change is in % of Pref. The new power output may be limited by the Minimum Regulating Level. After each frequency step: • • • • • the initial delay time shall be as short as possible; the maximum settling time in case of increasing frequency must be: 30 s (SPGM); 20 s (PPM and OPPM); the maximum settling time in case of decreasing frequency must be: 6 min (SPGM); 30 s (PPM and OPPM); hold until conditions stabilise; the PGM shall maintain the new operating point for at least 15 minutes (SPGM); 2 minutes (PPM and OPPM). Figure 4.5 LFSM-O test points corresponding to 5% droop The frequency response test will be repeated for frequency ramps with gradients of 0.2 Hz per minute (at 5% droop 8% Pref per minute). Documentation/measurements • • • The simulated frequency, P, Q, V shall be measured as function of the time at the Connection Point; all will be recorded on the same time scale; Applied settings of PGM and GU controller including frequency droop setting; A tolerance band of max. +/- 5% of the measured value will be accepted. Test evaluation criteria The test shall be deemed successful if the following conditions are fulfilled: • • The PGM has not tripped as a consequence of the test during or after the test The frequency threshold is 50.2 Hz • The active power response to a frequency rise at or above 50.2 Hz is according to the droop setting • The initial delay time shall be as short as possible; if the initial response time is beyond 2 s, the PGFO has to offer a reasonably justification to the RSO The settling time is maximum 30 s (SPGM) or 20 s (PPM and OPPM) The PGM maintains each new operating point for 15 minutes (SPGM) or 2 minutes (PPM and OPPM) after each frequency step and frequency ramp Undamped oscillations do not occur after the step change response. • • • LFSM-O Simulations Regarding LFSM-O, generating units are type tested on this requirement. In case of a PPM type B of which each Generating Unit is only controlled by an individual Generating Unit 27 RfG compliance verification for Power generating modules types A, B, C and D controller and not by a PGM (park) controller, if for this requirement certificates are available for all dynamically active equipment in the PPM, simulations to prove compliance with this requirement will not be required by the RSO. In case of a PGM (park) controller, the simulations are always required. The control settings shall be specified to the RSO. Simulation procedure The simulation will be carried out by simulating frequency steps and frequency ramps which are sufficiently large to reduce the active power output to the PGM's Minimum Regulating Level. As stated in RAE Decision 1165/

article: 13

article: 15

Article 15

article: 15

article: 15

article: 3.24, sub 3 Test: RfG article 45

Article 15

article 15

article 15

Article 15

Article 15

Article 15

Article 15

Article 13(1) are: 47.5 Hz – 51.5 Hz.

The voltage limits laid down by the RSO are: • type C 0.90 pu – 1.10 pu; The voltage limits laid down in RfG Article 16