Publications

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Publications

Modification No. 42 Clarity of Power Factor Requirements for Windfarms at Low Power Levels

CRU has approved Modification No. 42 of the Distribution Code. This modification allows reactive power at a windfarm’s connection point to vary up to a maximum of 0.12 of Q / P [importing VARs] when generation output is below 12% of Registered Capacity.

Effective Date 16/03/2018

Download PDF | 183KB

CRU Approval Letter

Modification No. 41- DCRP Class Derogation

The CRU has approved Modification No. 41 of the Distribution Code. The purpose of this Modification is to allow the relevant System Operators or Distribution Code Review Panel to propose class derogations to the CRU, rather than requiring each individual affected party to make a bespoke application.

Effective Date 10/10/2017

Download PDF | 393KB

CRU Approval Letter | 44KB

Modification No. 45 - Met Signal Requirements

Proposed to remain aligned with a similar Grid Code modification. The modification is proposed to give WFPS the opportunity to discuss acceptable alternative sources for the provision of met data signals.

Effective Date 06/11/2018

Download PDF | 111KB

CRU Approval Letter | 47KB

Modification No. 44 - 1.1 pu Clarification and Adoption of Declared Supply Voltage

The most recent version of EN 50160, introduced the new parameter of “Declared Supply Voltage”. The voltage at the Connection Point shall be kept within +/- 10% of these values. Up to now, these parameters had not been defined.

Effective Date 11/10/2018

Download PDF | 347KB

CRU Approval Letter | 59KB

Modification No. 36 Extension of WFPS requirements to PV and other Non-Synchronous generation plus the non-retrospective reduction of the MW Controllability threshold for PPMs to 1MW

CRU has approved Modification No. 36 of the Distribution Code. The requirements stated under DCC11 are driven largely by the combined effect that large penetration of Non-Synchronous generation on the operation of the Transmission System. To date, this cohort of generation has comprised, almost exclusively of wind generation. It is now apparent that other forms of generation [most notably PV], which have an invertor between the primary source and the Connection Point, present the same technical challenges to System Operation. It is logical therefore that the same technical requirements should apply to them.

This approach is also consistent with that which will be taken upon adoption of the European Network Codes, most notably the Requirements for Generation [RfG], wherein the document structure is divided between Synchronous Generators and what are termed Power Park Modules.

Separately, the total quantum of generation connecting to the system has reached levels at which the quantum of un-controlled real power from distribution connected generation poses a threat to the stability of the power system. For that reason and for the reasons stated above with regard to the increase in solar generation connections, EirGrid deem necessary to make more of the PPM fleet MW controllable.

Effective Date 05/02/2020

Modification Proposal No.36 | Download PDF 310KB

CRU Approval Letter of Modification No.36 | Download PDF 76KB

Class Derogation DAID323 against Modification No.36 | Download PDF 245KB

CRU Approval Letter of Class Derogation DAID323 against Modification No.36 | Download PDF 931KB

Modification No. 43 Proposed Distribution Code structural changes to facilitate adoption of RfG (and subsequent) Network Codes

The CRU has approved Modification No. 43 of the Distribution Code. This modification proposal describes the proposed structural changes to the Code that will facilitate the inclusion of new and changed content driven by the adoption of the Requirements for Generators [RfG], in the first instance. Some of the proposed changes will also facilitate the adoption of parts of other Codes such as the Demand Connection Code, in due course.

Modification Proposal No. 43 | Download PDF | 150 KB

CRU Approval Letter of Modification No. 43 | Download PDF | 85 KB

Distribution Code - Modification Proposal Form

Distribution Code Modification Proposal Form.

Download PDF | 20 KB

Modification No. 35 Power Factor Requirements for Type B(less than 5MW)/C/D Wind Farms

Modification No. 35 Power Factor Requirements for type B (less than 5MW)/C/D Wind Farms.

Effective Date 13/04/2016

Download PDF | 414 KB

CER Approval Letter

Modification No. 34d Define Generator Operating Modes

Modification No. 34d - Define Generator Operating Modes

Effective Date 01/04/2016

Download PDF | 165 KB

CER Approval Letter

Modification No 34c Higher and Lower Voltage Limits for Fault Ride-Through for all Generators

Modification No. 34c - Higher and Lower Voltage Limits for Fault Ride-Through for all Generators.

Effective Date 01/04/2016

Download PDF | 171 KB

CER Approval Letter | 28 KB

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