CLASS webinar 27 June 2014 1
CLASS webinar 27 June 2014 Simon Brooke, Low Carbon Projects Manager Electricity North West 2
Agenda Voltage regulation Introduction technologies Baseline survey report Questions & answers 3
Webinar format 10 minutes 30 minutes presentation questions & answers Submit written questions on line during the webinar or Press 01 on your telephone key pad to take part in the Q&A at the end of the presentation 4
Electricity North West’s innovation strategy Offer new services and Maximise choice for the use of existing future assets Delivering Generate value to value for Innovative customers customers solutions now to real problems Proven technology deployable today 5
Our smart grid development Leading work on developing smart solutions Deliver value from existing £30 million assets Three flagship products Capacity to Customers 6
CLASS Is seeking to demonstrate that electricity demand can be managed by controlling voltage… …without any discernible impacts on customers 7
Elements of CLASS System Provide a demand Demand Reduce demand reduction capability balancing reduction at time of to support system support system peak balancing Voltage control Mitigate excessive voltages that occur when generation is high and demand is low 8
Key activities to date Jan 2013 June 2014 Engage Design and Build data Design the customers installation link with trials and Site and develop National test of CLASS Selection survey Grid regime technologies material 60 primaries CLASS Real-time The Engaged selected solution data link to methodology customer which define designed; National Grid and schedule panels to the CLASS hardware developed for the elicit trial area and software CLASS trials customer installed developed views Knowledge sharing and dissemination 9
Automation technologies and substation intelligence Dr Vincent Thornley Siemens Smartgrid Division Energy Automation 10
Presentation Overview Introduction to CLASS • CLASS Functions and Techniques Voltage-Demand Relationship Tap Stagger Principle Substation Arrangements • Numerical AVC Relays • Retrofit Considerations ASC Functionality 11
Introduction to CLASS CLASS Functions and Techniques Detection / Customer need Action Effect activation Reduction of Reduction of Onsite Frequency Trip parallel customer customer frequency response transformers voltage, which voltage, which detection reduces load reduces load Increase of Balancing and Adjust AVC Adjust AVC customer system security target voltage target voltage voltage, which increases load Command from Command from SCADA SCADA Absorption of Reactive power Stagger taps VArs from EHV network 12
Voltage-Demand Relationship Instantaneous Relationship 1.4 1.2 Normalised Demand 1 0.8 0.6 Constant-R 0.4 Constant-P 0.2 50:50 Mix 0 0.94 0.96 0.98 1 1.02 1.04 1.06 PU Voltage 13
Voltage-Demand Relationship Time Impact on Demand PU Voltage / Normalised Demand Illustration only 1 Demand 0.9 Voltage 0.8 00:00 00:15 00:30 00:45 01:00 01:15 01:30 Time (h:m) 14
Tap Stagger Principle • Can be used to create additional 2 n . I n . k L reactive load presented to transformer primary-side network I n 1 C • Diagram shows vector currents circulating at different points current 2 – Solid arrows represent load k Tap up Tap down – Dashed arrows represent I I circulating current C L 2 I • Mismatch of taps creates ‘spill’ of L circulating current on primary side 15
Substation Arrangements Numerical AVC Relays • Measurements from AVC relays: RTU – V, P, Q, f • Instructions to AVC relays: ASC – Target voltage adjustment – Tap stagger adjustment AVC AVC • Circuit breaker I/O: – CB status, trip, close • Interface with Control Desk – via standard substation RTUs – Commands from and status to ASC = Autonomous CLASS- CLASS dashboard Existing Substation Controller installed 16
Substation Arrangements Retrofit Considerations • Target voltage adjustment: RTU – Older relays (particularly e/m) don’t have ability to adjust targets Argus 8 ASC Argus 8 – Multi-tapped interposing VT allows adjustment (similar to OC6) AVC AVC – Tap selection by Argus 8 relay outputs • Measurements: – Not available from AVC relay – Additional relay (Argus 8) ASC = Autonomous CLASS- Existing measures V and f Substation Controller installed 17
Substation Arrangements Installed Equipment 18
ASC Functionality Frequency Response • Two Responses, termed primary and secondary • Secondary Response – slow – ‘Higher’ setpoint (e.g. 49.8Hz) – Adjustment of AVC setpoint only • Primary Response – fast – ‘Lower’ setpoint (e.g. 49.7Hz) Vs Trip CB – Trip parallel transformer and adjustment of setpoint – Includes checks for bus coupler, transformer on load and firm capacity f 49.7 49.8 19
ASC Functionality Reactive Power Management • Makes use of functionality inherent in AVC Relay 2 k • Combined requirements Tap up Tap down – Maintain regulation of voltage I I C L – Introduce circulating current – Prevent tap changers from 2 I L running away • Achieved by setting different Vector diagram of loads reactive power targets for each AVC relay I T1 V • Three stages of operation I T2 I total 20
ASC Functionality Load Management • Manual services Load (MVA) – Demand reduction Upper limit (98%) (full and half) – Demand boost Lower limit (85%) (full and half) Time (Sec) Voltage setpoint • Automatic demand reduction Voltage (V1) – Single stage CB 1 (S/S 1) Time (Sec) 21
ASC Functionality Overview RTU Autonomous Substation Controller SICAM ACP Feeder Line modelling CBs / Feeder panels Local coordination and prioritisation Switch management Thermal modelling Battery bank / inverter Battery capacity Local thermal management management Data concentrator AVC relay OLTC AVC management Frequency management Capacitor bank Capacitor control Local voltage management Premises – LV Reactive power Demand management Conn Mgr management Network function Component layer Abstraction Device management Coordination CLASS functionalities Outside CLASS functionalities 22
CLASS Customer Engagement Baseline Survey Report, June 2014 Dr David Pearmain Director of Advanced Methods Impact Research 23
Customer research methodology “CLASS will be indiscernible to customers” Customers will not see / observe / notice an impact on the supply quality when these innovative techniques are applied Quantitative Qualitative Customer research Compare Formulate communications feedback and materials trial vs control 24
Where are we now in the customer engagement plan? Agree process Brief customer First seasonal for dealing facing survey with customer employees (summer) enquiries Additional face WE ARE HERE: Baseline to face Findings survey recruitment as published completed appropriate April May August September 2014 2014 2014 2014 25
This presentation contains feedback from our panel of 696 CLASS participants prior to any CLASS tests 200 industrial 496 domestic All 696 CLASS participants and commercial live or work at properties on customers selected CLASS circuits. customers A statistically robust and representative sample 26
Objectives of the baseline survey Recruitment of customers into the CLASS project Data privacy consent Obtain demographic data for subsequent analysis Objective Obtain behavioural data for subsequent analysis Obtain perception data to benchmark current satisfaction Establish preferred (future) contact method Communication of next steps and incentive payment 27
92% of households are ‘often’ or ‘always’ in during peak demand hours of 4-7pm - hence they at least have the opportunity to observe CLASS Don't know / Varies too much Never Not very often Occasionally Often Always Day time Monday to am pm Friday (9am- 3 4 7 14 25 47 5pm) Tea time Monday to 3 1 0 4 23 69 Friday (5pm- 7pm) pm Evening Monday to pm am 2 0 2 19 77 Friday (After 7pm) 3 1 7 26 64 Weekends Domestic N = 496 Ask All C3 On average, when are you or other members of your household, at home during the week and weekend for extended periods of time? 28
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