UK Power Networks – OC2 Data Sharing

Alex Jakeman, Matt White and Richard Wilson

February - 2016

2014. UK Power Networks. All rights reserved

Agenda

2

• UKPN’s Innovation Project Overview - Kent Active System Management (KASM)

• How is UKPN’s network planning is affected by the Grid Code?

• Implication on UKPN’s Long Term Planners

• Options moving forward

• Timescales

• Questions and Next Steps

2014. UK Power Networks. All rights reserved

Project Background (update): DG Heat Map:

DG Heat map (Nov 2015) SPN DG Connection Offers accepted (May 14 – June 15)

1GW

SPN DG Connection Offers Accepted (Cumulative)

250MW (SPN Area) / 15MW (KASM Area)

2014. UK Power Networks. All rights reserved

Increasingly Dynamic DNO Network (East Kent Area):

PMA / PGA route

G

1GW export to Netherlands

SGT1

SGT2

88 MVA load

G

Herne BayCanterbury North 132

Canterbury 400

G

55MW of additional offered generation

315MW from Thanet Wind Farm

Thanet, Margate, Ramsgate load via Thanet & Monkton Grid

G

Eurotunnel load

2GW import from France

SGT1

SGT2

Sellindge 132

Sellindge 400

G

PU route132kV single circuit

Folkestone load

PHA/PC route*

PX route132kV dual circuit

* simplified, since Betteshanger is teed off from this line

G

NG 400kV connected generation

NG 400kV connected generation

80 MVA load

99 MVA load

Richborough 132

45 MVA load

G48 MW various DG

Sellindge load

25 MVA load

Canterbury South 132

90MW from Kentish Flats

PV route132kV dual circuit

Ashford

G20MW of additional offered generation

G66MW of additional offered generation

G

42 MVA load

G

50MW of additional offered generation

G112MW of additional

offered generation

25MW of additional offered generation

36MW of additional offered generation

PR route132kV single circuit

2 GSP (> 350 in UK)

2 Interconnectors (Third 1GW with Belgium by 18/19)

(Fourth 1GW with France)

HVDC

HVDC

770 MW of connected generation (Mostly wind)

100 MW of accepted Generation (Mostly solar)

GSP

GSP

2014. UK Power Networks. All rights reserved

Summary of Issues:

Increasing wind / solar farms connected

(Unpredictable power flows)

Long lead times and high cost for generation to connect

(£11m / Post 2020)

East Kent network requires 34 Contingency scenarios to be analysed

Parts of the network reaching Reverse Power Flows limits

(Export to Transmission Network)

Existing generators can be constrained up to 30% during outages

(90MW for some generators)

Greater need for monitoring and real-time analysis

(KASM)

No longer “day” of highest winter and lowest summer demand

Worst case operational and planning practices

(Min Demand, Max Generation / No diversity)

2014. UK Power Networks. All rights reserved

KASM Project:

Investigate whether contingency analysis software can be used to safely run

the high voltage network closer to its limits, by moving away from

conservative, ‘worst case’ assumptions.

New capabilities: Real-time and automated contingency analysis

Benefits:

• Reduce constraints on renewable generators

• Release network capacity

• Defer costly network reinforcements

£3.9m / 3 years

Project partners: Supplier (Bigwood):

2014. UK Power Networks. All rights reserved

What is it? How we do it today? How KASM will deliver?

Reliability

Management

(Control

Engineers)

Real-time monitoring of the

network operation and mitigation

of the effects of faults

Restorative

Alarms indicate to the control

room engineers when asset

loading exceeds established

limits. Engineers make decisions

on corrective actions

POWER-ON

Preventative

Constantly analysing potential

contingencies before they

occur, alerting control room

engineers, and recommending

preventative actions

POWER-ON + CA

Outage

Management

(Outage Planners)

Assessing short-term operating

conditions for the network based

on planned maintenance and

forecasted generation and

demand

Manual

Outage planners manually

analyse all possible

contingencies, to ensure that

outage plan is consistent with n-

1 reliability requirements

DIGSILENT

Automated

Automate the analysis of all

possible contingencies.

Forecasting capability will allow

outage planners to use hourly (or

sub-hourly) estimates of demand

and generation

DIGSILENT + CA

Network Capacity

Management

(Infrastructure

Planners)

Assessing network capacity, and

determining timely reinforcement

to ensure reliable operation

Worst case

Infrastructure planners design

the system to withstand worst

case planning assumptions

DIGSILENT

Actual

Archiving capability will enable

infrastructure planners to

incorporate actual diversity of

generation and coincidence with

demand.

DIGSILENT + CA

Case Studies:

2014. UK Power Networks. All rights reserved

How is UKPN’s network planning is affected by the Grid Code?

8

Operational Planners:

- Full visibility of National Grid Network and generators connected

- Receive National Electricity Transmission Study Network Data Files

(NETSNDF), showing expected running arrangements and expected output of

generators 2 weeks in ahead of real-time

Long Term Planners:

- Limited visibility of National Grid Network and generators connected. Network

modelled as equivalents.

- Receive a reduced network model under the week 42 data

Grid Code OC2.4.1.3.3.(i).z.5 states that:

‘…the data from the National Electricity Transmission System Study

Network Data Files received by each Network Operator must only be used

by that User in operating that Network Operator’s User System and must

not be used for any other purpose or passed on to, or used by, any other

business of that User or to, or by, any person within any other such business

or elsewhere.’

2014. UK Power Networks. All rights reserved

Implication on UKPN’s Long Term Planners

9

Issues:

• South East network is extremely complex due to interconnected nature,

generation patterns and interconnectors

• Complex power flows can cause issues such as potential post-fault plant

overloads and reverse power flows towards National Grid

• UKPN are now exporting to National Grid’s network it is important to

accurately model the whole network in longer-term planning timescales

• Longstanding issue but highlighted by the KASM project

Benefit of having access to NETSNDF:

• The ability to model the full network including 400 and 275kV running

arrangements will ensure better protection of distribution and transmission

assets and better utilisation of existing infrastructure.

2014. UK Power Networks. All rights reserved

Options moving forward

10

Ref Option

1 Conclude that NETSNDF data can be used for planning purposes as well as operationally.

2

Seek a derogation from the Grid Code to allow sharing of data as required. This is unlikely to be successful as it raises questions of data ownership which makes a derogation inappropriate.

3

Seek permission from the data owners to use data as required. In terms of the ownership of NETS NDF study data the owners are National Grid, DNOs and generators

4

Strip out any potentially confidential data from the study files. This could be an interim solution but unless automated becomes a repetitive and labour intensive task which addresses the symptom and not the cause.

5

Make a change to the Grid Code to remove the restriction in OC2.4.1.3.3.(i).z.5 requiring the use of data supplied under this to be for operational purposes only.

2014. UK Power Networks. All rights reserved

Timescales

11

GCDF

04/02/16 GCRP

16/03/16

KASM Trials Start

01/04/16 Roll out to BAU

Latest 01/12/17

• To start full trials long term planners need access to the NETSNDF

• A delay in starting the trials could result in delaying the roll out of the full

solution

• Need a solution to allow trials to start as planned

Timeline showing key milestones moving forward

Now 2017 2018

2014. UK Power Networks. All rights reserved

Key Questions to Answer

12

1) What solution would allow the KASM trials to start at the beginning of April

2016?

2) Do we expect any issues progressing this to a Grid Code change request?

3) Would you be supportive of a Grid Code change request?

4) How long would we anticipate it takes to amend the Grid Code?

5) Do we think the NETSNDF data is available in the public domain?

2014. UK Power Networks. All rights reserved

Supporting

Slides

2014. UK Power Networks. All rights reserved

£3.9

£1.6

£2.3

£0.2 £0.7

£0.4

£8.6

£2.1

£0

£2

£4

£6

£8

£10

£12

KASM methodcosts

First-of-a-kindcosts

Repeatableimplementation

cost

Outage planninglabour costs

Deferral of SGTreinforcement

Avoided lostrevenue and

carbon emissions

Deferral of otherassets

reinforcement

Millio

ns (

20

14

)

Other assets in the

network (e.g. OH Lines)

may require generator-

funded reinforcement

£m

Project costs are enabling for

whole of UK Power Networks

Real Options Valuation

showed that the benefit from

the deferral of the SGT could

be as high as £1.1m

Project Benefits:

2014. UK Power Networks. All rights reserved

£2.3 £2.3

£13.8

£2.9

£9.3

£79.5

£0

£10

£20

£30

£40

£50

£60

£70

£80

£90

KASM UK Power Networks GB network

Millio

ns (

20

14

)

Cost

Benefit

Assuming

six sites

by 2030

Low costs for subsequent implementations within UK Power Networks, covered by the business

Assuming

thirty sites

by 2030

GB Benefits:

2014. UK Power Networks. All rights reserved

SDRC’s

Criteria Date

9.1 Development of the strategy for inter-control room communication protocol for the purposes of KASM December 2015

9.2 Completion of the system integration of Contingency Analysis (CA) software into UK Power Networks systems, excluding a real-time link to National Grid

March 2016

9.3 Completion of installation of forecasting modules that will link the DNO control room with other data sources March 2016

9.4 Demonstration of use of real-time contingency analysis in the control room December 2016

9.5 Completion of trials and implementation of reliability management, outage management and network capacity management December 2017

9.6 Development of business design to incorporate contingency analysis as business-as-usual December 2017