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Requirements for Generators

+ the GB Grid Code

10th June 2015

Richard.Woodward@nationalgrid.com

Topics

Introduction to European Network Codes

Requirements for Generators overview

RfG implementation work

Grid Code engagement opportunities

2

3

The Third Energy Package

3 regulations and 2 directives.

Adopted July 2009, law since March 2011

Key step forward in developing a (more) harmonised European energy market

Separation of ownership of monopoly energy transmission activities

Formation of European Transmission System bodies, ENTSOG and ENTSO-E

Formation of ACER – Agency for Cooperation of Energy Regulators

Security of supply

Competitiveness Sustainability

4

European Network Codes overview

There are 10 codes in development.

When in force they will take precedence over GB law

Demand Connection

Code HVDC

Forward Capacity

Allocation Balancing

Operational

Planning

and Scheduling

Load Frequency

Control and

Reserves

Grid

Connection

Markets

System

Operation Emergency and

Restoration

Requirements for

Generators

Capacity Allocation and

Congestion Management

Operational

Security

5

European Network Codes

(from 2014-)

Electricity Codes: The industry’s rule book

European Legislation

e.g. Third Package

UK Legislation

e.g. Electricity Act 1989

GB Framework

CUSC

Grid

Code

BSC

STC

NGET’s Transmission

Licence

Obligation to have and

maintain a set of Codes

Distribution, Supplier and

Generation Licence Holders

Obligation to abide by Codes

Requirements for Generators overview

6

7

UK law and network codes

Up to 16A/ph (3.68kW

1ph, 11.04kW 3ph)

Transmission connected

generation

Size above these

values

Existing GB Codes

Grid Code and Distribution Code work jointly;

D Code is supported by Engineering Recommendations

Distribution connected generation

Grid Code

Distribution Code

ER G83/2 ER G59/3

reference

BM parties,

LEEMPS

8

Grid Code – applies to transmission connected generation

European law: Requirements for Generators Network Code

UK law and network codes

Distribution Code – applies to distribution

connected generation (shell and reference)

Requirements for Generators Application

Place all requirements in Grid Code. D Code operates as

shell and onwards reference to supporting documents

Type D, DNO

connected

NB All thresholds subject to confirmation but shown for illustration

Su

pp

ort

ing

do

cu

me

nts

(G98-1)

Single

premises,

<16A/ph

(G98-2)

Multiple

premises

<16A/ph or

type tested

<17kW/ph

(G99-1)

>17kW/ph

and <10MW

(G99-2) 10-50MW & <132kV

onwards reference

RfG

Ban

ds

Type A:

800W-1MW

and <110kV

Type B:

1-30MW

and <110kV

Type C:

30-50MW

and <110kV

Type D:

>50MW

or >110kV

Type A:

800W-1MW

and <110kV

Type B:

1-50MW

and <110kV

Type C:

50-75MW

and <110kV

Type D:

>75MW

or >110kV

Requirements for Generators Intro

“…a network code which lays down the requirements for grid

connection of power generating facilities, including

synchronous power generating modules, power park modules and

offshore power park modules, to the interconnected system”

“It, therefore, helps to ensure fair conditions of competition in the

internal electricity market, to ensure system security and the

integration of renewable electricity sources, and to facilitate

Union-wide trade in electricity”

It also lays down the obligations for ensuring that system

operators make appropriate use of the power generating

facilities’ capabilities in a transparent and non-discriminatory

manner to provide a level playing field throughout the Union”

Article 1, 2015 draft RfG

9

Introduction to RfG “banding”

Technical requirements are applied to generators based

on four MW capacity/connection voltage thresholds

Broadly, Type A-B requirements are more akin to a

manufacturing standard. Types C-D are similar to

existing GB Grid Code requirements (i.e. real-time)

TSOs need to define thresholds – justified by a Cost-

Benefit analysis; ratified via industry consultation and

Authority approval

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SHET SPT NGET

Small <10MW <30MW <50MW

Medium 50-100MW

Large 10MW+ 30MW+ 100MW+

Generator

Size

Direct Connection to:

Subject to confirmation: Type A Type B Type C Type D

Connection Voltage: <110kV <110kV <110kV >110kV

GB: 2015 RfG 0.8KW-1MW 1MW-50MW 50-75MW 75MW+

GB: NGET proposal 0.8KW-1MW 1MW-30MW 30-50MW 50MW+

Introduction to Banding – Type A

A basic level necessary to ensure capability of generation over

operational ranges with limited automated response and minimal

system operator control.

Type A ensure that there is no large-scale loss of generation over

system operational ranges, minimising critical events, and include

requirements necessary for widespread intervention during system-

critical events.

Overview of technical requirements:

Operation across a range of frequencies

Limits on active power output over frequency range

Rate of change of frequency settings applied (likely to be at least 1Hz/sec)

Logic interface (input port) to cease active power output within 5 secs

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Introduction to Banding – Type B

Type B provides for a wider range of automated dynamic response,

with greater resilience to more specific operational events.

They ensure an automated response to alleviate and maximise

dynamic generation response to system events.

Overview of technical requirements

Type A, plus…

Ability to automatically reduce power on instruction

Control schemes, protection and metering

Fault Ride Through requirements

Ability to reconnect

Reactive capability

Reactive current injection

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RfG Implementation

15

16

Joint GCRP/DCRP RfG Workgroup

Direction from all parties to use existing code modification

processes as far as possible

Terms of reference for workgroup circulated to all GB

code panels for feedback;

Approved by GCRP and DCRP in late 2013

Discussed at JESG, in DECC/Ofgem forums

Workgroup (“GC0048”) formed in Jan 2014; 10 meetings

since

Model for other connection codes (HVDC/DCC)?

GC0048 Workgroup Representation

17

Waters Wye Associates

Senvion

Ofgem

UK Power Networks

Nordex

EDF Energy

Northern Powergrid

TNEI

ENER-G Combined Power Limited

EON RES

Scottish Power

S&C Electric Europe

SSE

Electricity North West

DONG

ENA

Ricardo

DECC

AMPS

Cummins Generator Technologies BEAMA

EDP Renewables Renewable UK

Lark Energy (solar)

Sheffield Solar

juwi Renewable Energies

Powercon

Endurance Wind Power

Enercon

Ecuity

Centrax Engineering Services Ltd

Britwind

National Grid

RWE

Grid Code/EU engagement opportunities

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Future Meetings

Grid Code Development Forum (GCDF)

Weds 12th August @ NGET, Warwick (bi-monthly)

GC0048 – Requirements for Generators (Joint Grid

Code/D-Code workgroup)

Mon 20th July @ NGET, Warwick (monthly)

Part of two day Code Mapping workshop

Contact grid.code@nationalgrid.com for more info

Joint European Stakeholder Group (JESG)

Weds 29th July @ Elexon, London (monthly)

Contact box.europeancodes.electricity@nationalgrid.com

for more info 19

Richard.Woodward@nationalgrid.com

Land line: 01926 656596

Mobile: 07964 541743

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