European Network Codes - Joint Panel Working Groups

Current Distribution & Grid Code Issues and Modifications

Last updated 16 May 2018
National Grid links in red below.

GC0100 - EU Connection Codes GB Implementation - Mod 1

This modification (1/4) will set out within the Distribution Code and Grid Code the following compliance obligations in the EU Connection Codes:

1. Scope and applicability of the RfG, DCC and HVDC requirements for GB users

2. Set the x4 Type (A-D) MW banding levels for GB, as required in RfG

3. Set the GB Fast Fault Current Injection parameters, as set out in RfG

4. Set the GB Fault Ride Through requirements, as set out in RfG and HVD

Modification Proposal

GC0101 - EU Connection Codes GB Implementation - Mod 2

This modification (2/4) will set out within the Distribution Code and Grid Code the following compliance obligations in the EU Connection Codes:

1. Set the Voltage & Reactive requirement in GB, as required in RfG and HVDC

2. Set the Frequency requirements in GB, as required in RfG and HVDC

Modification Proposal

GC0102 - EU Connection Codes GB Implementation - Mod 3

This modification (3/4) will set out within the Distribution Code and Grid Code the following compliance obligations in the EU Connection Codes:

1. Set the System Management parameters, as set out in RfG and HVDC

2. Set the Compliance requirements, as set out in RfG, DCC and HVDC

Modification Proposal

Consultation

DCRP Report to Authority

Distribution Code GC0102/DCRP Authority Decision

GC0104 - EU Connection Codes GB Implementation - Demand Connection Code

This modification will set out within the Distribution Code and Grid Code the following compliance obligations in the European Network Code – Demand Connection Code (DCC)

1. Technical requirements for new* Transmission-connected Demand

Facilities; Transmission-connected Distribution Facilities and Distribution

Systems.

2. Technical requirements for Demand Units used by a Demand Facility or

a Closed Distribution System to provide Demand Response Services to

System Operators.

* ‘New’ is defined as not being connected to the system at the time that the code enters into force and not having concluded a final and binding contract for the purchase of main plant items by two years after entry into force.

Modification Proposal











GC0062 Fault Ride Through working group

It is proposed that the Grid Code is changed to provide clarity to the fault ride through performance for Synchronous Generating Units. Grid Code paper pp12/04 raised concerns over the ability of Synchronous Generating Units to meet the current GB Grid Code fault ride through requirements, particularly in respect of faults lasting longer than 140ms. To address this issues, consideration is being given to the early adoption of the Fault Ride Through requirements for Synchronous Generators as detailed in the ENTSO-E Network Code Requirements for Generators (RfG) which it is believed will address these issues.


GC0087 - Development of Grid Code Frequency Response Provisions

Proposals to develop the Frequency Response provisions of the Grid Code under GC0022 did not reach a conclusion. National Grid believes that there are a number of outstanding defects with the Frequency Response provisions of the Grid Code which should be addressed in a new Workgroup (GC0087).