Active Fault Management Paul Marshall 5 th February 2018 1 Agenda - PowerPoint PPT Presentation

Active Fault Management Paul Marshall 5 th February 2018 1

Agenda Respond Introduction Project overview techniques Safety Case Customer Site Visit 2

Respond overview Respond is the first UK demonstration of an active fault level management solution that avoids traditional network reinforcement Competitive competition Funded by GB customers Learning, dissemination & governance Fourth of our five successful Tier 2 / NIC projects System Purchase Project Site Post fault Closedown Design installation FCL Safety case Starts selection analysis Nov 2015 & Go Live customer Sep 2018 Oct 2018 Jan 2015 May 2015 Apr 2018 Financial May 2016 Apr 2018 benefits Investment Project partners £5.5 Up to £2.3bn to GB by 2050 million 3

Respond project hypotheses Will deliver a buy order of Facilitates active Faster and cheaper to fault level mitigation management of fault current, apply than traditional solutions based on a cost using retrofit technologies reinforcement benefit analysis and commercial services £ Reduces bills to customers Enables a market for the Uses existing assets with through reduced network provision of an FCL service no detriment to asset health reinforcement costs 4

Real time mitigation techniques REAL TIME ASSESSMENT TOOL RATING POTENTIAL FAULT CURRENT  Real time fault current assessment  Safe network operation  5

Adaptive Protection at seven sites Adaptive Using redundancy Network already Protection in the network designed to break changes the order ensures no other fault current in which circuit customers go off breakers operate supply to safely disconnect the fault 6

Adaptive Protection 7

Adaptive Protection Adaptive Protection is only enabled when fault level is exceeded then either the transformer breaker or bus Electricity section breaker operates before North West the feeder breaker reducing fault substation current Now the CB can operate within its fault rating Customer load Customer load 8

I S -limiters – two sites and five sensing sites Operates within 5 milliseconds or 1/200 th of a second Detects rapid rise in current when a fault occurs and responds to break the current Respond will prove the technology, review safety case and deploy at two sites 9

I S –limiter – Bamber Bridge Transformer 1 Transformer 2 Is-limiter 10

I S –limiter – Broadheath Transformer 1 Transformer 2 11

I S -limiter sites 12

I S -limiter 13

Fault Current Limiting (FCL) service Two UU sites and three external sites Fault current generated by customers can be disconnected using new technology Financial benefits to customers taking part and long term to all customers Challenge is to identify customers to take part in a trial of the FCL service 14

Fault Current Limiting service FCL service is only enabled when fault level is exceeded then the customer’s breaker operates before the feeder breaker reducing fault current Electricity North West substation Customer Customer load CHP Customer protection operates before our CB 15

Trials and analysis phase 105 faults occurred across 14 Respond sites Nine successful operations of the Respond techniques Seven adaptive protection operations at four different sites Respond Two I S -limiter operations at Bamber Bridge techniques All techniques operated correctly as designed No false operations or failures to trigger occurred Supports the reliability of the techniques for the safety case 16

Atherton Town Centre Collier Brook 11kV cct 29 July 2016 Adaptive Protection sees the Develops into Fault and operates in 35.5ms a 3 phase fault Disturbance Record (T11 and T12 currents) Normal Current Feeder Fault level magnitude circuit Load + Fault is reduced breaker Current opens in Fault Current 800.8ms Develops into phase- AP CB breaker operates in 100.3ms Removing phase-earth fault fault at Phase to Normal Current reduced Earth fault level Fault magnitude Fault Current Reduce earth current but still present 17

Waveform vs Sequence Fault level magnitude is reduced Adaptive Protection relay sees the fault and AP CB breaker operates in operates in 35.5ms 100.3ms, AP relay opening the detects fault bus-section breaker Allowing the feeder circuit breaker to open at reduced fault level in 800ms 18

I S –limiter Bamber Bridge 22 nd May 2017 Transformer 1 Transformer 2 Allowing the feeder circuit breaker to open No waveforms at reduced fault level are available due in 1.37secs to the speed of operation of the I S -limiter Series CB Red phase opened in Is-limiter I S -limiter 51ms responded to a fault 19

Bamber Bridge red phase fuse 20

Fault Current Limiting service A target market was identified of Survey analysis customers from non- ‘appeared to prove’ manufacturing industries and the hypothesis that the those ‘able to constrain their motor or Respond method enables a generator’ market for an FCL service for up to 10 minutes, without significant impact 21

The reality – challenges of engaging with customers Aspiration 750 interviews/surveys Achieved 103 surveys Expressed interest 47 Willing to engage 13 Contracts 2 22

Lessons learned from customer engagement DNO community must develop greater commercial understanding of its target market ! \\\ \\\ \\\ Transition from Loss of critical Assessment of Conflicts with While there are expression of plant, even for a risk verses the other services potential interest to active short duration, incentives and are a significant conflicts, equally participation in can have a saving available barrier there could be FCL service significant is fundamental in possible DNOs need to identifies need impact an organisation’s synergies which better for greater decision-making warrant further understand awareness process investigation services already available in expanding and competitive marketplace 23

Next steps \\\ Continue to deploy the Trial ongoing until Examine the key FLAT and the three May 2018 questions and hypotheses techniques Examine the relative Customer recruitment Build safety cases for benefits versus financials phase for FCL service each of the techniques for the three techniques 24

For more information www.enwl.co.uk/innovation e innovation@enwl.co.uk 0800 195 4141 @ElecNW_News linkedin.com/company/electricity-north-west facebook.com/ElectricityNorthWest youtube.com/ElectricityNorthWest Please contact us if you have any questions or would like to arrange a one-to-one briefing about our innovation projects 25