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Greet Vanalme – NL – RIF Session 6 – Paper 0786

The introduction of local system services – the case of storage in the low voltage network. Yoush van Vlimmeren, University of Technology Eindhoven ; Greet M.A. Vanalme , University of Technology Eindhoven ; Geert P.J. Verbong, University of Technology Eindhoven;

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Greet Vanalme – NL – RIF Session 6 – Paper 0786

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  1. The introduction of local system services – the case of storage in the low voltage network Yoush van Vlimmeren, University of Technology Eindhoven; Greet M.A. Vanalme, University of Technology Eindhoven; Geert P.J. Verbong,University of Technology Eindhoven; Martijn Bongaerts, Alliander; Wil L. Kling, University of Technology Eindhoven Greet Vanalme – NL – RIF Session 6 – Paper 0786

  2. Contents • Introduction • Local system services • Fitting local system services in the market • Case study: local system services using locally available storage • Conclusions Greet Vanalme – NL – RIF Session 6 – Paper 0786

  3. Introduction Problem definition • Socio-economic trends • Renewable energy sources↑ • New loads: E-cars, heat pumps • Challenges electricity system • Unbalance↑ • Local congestion↑ Current system services might become insufficient Research topic: Local system services (LSS) LSS use locally available flexibility (e.g. CHP, flexible load, storage,…) Greet Vanalme – NL – RIF Session 6 – Paper 0786

  4. Local system services  Local for local: location of LSS supplying devices important  Local for global: need of large number of devices + effective control Greet Vanalme – NL – RIF Session 6 – Paper 0786

  5. Fitting LSS in the market Greet Vanalme – NL – RIF Session 6 – Paper 0786

  6. Fitting LSS in the market - barriers • Technical challenges • Effective, reliable and secured control & communication • Legislation • Requirements for suppliers of system services • (minimum 5 MW unbalance power, 100% availability, direct control by TSO, registration and bidding needed at TSO level) • Tariff structure DSO • Established routines • Main actors have no direct need for LSS • … Greet Vanalme – NL – RIF Session 6 – Paper 0786

  7. Case study: LSS using storage • Introduction • LSS in residential area, local congestion management + balance keeping • Using storage • (+) promising new technology, with little intrusion in consumer’s comfort • (-) expensive  strategies where storage can address several markets / fulfil several system services are studied • Simulations for 3 configurations • Electric heat pump + E-car for each house • E-car + PV for each house • CHP, electric heat pump, E-car and PV for 50% of houses Greet Vanalme – NL – RIF Session 6 – Paper 0786

  8. Case study: LSS using storage Control strategies of storage in residential area Greet Vanalme – NL – RIF Session 6 – Paper 0786

  9. Case study: LSS using storage Simulations: Control of storage device Greet Vanalme – NL – RIF Session 6 – Paper 0786

  10. Case study: LSS using storage Simulation results Yearly transformer overloading (hours) • Beneficial effects on transformer loading • Distribution networks with a high degree of utilisation (e.g. eHP+ E-car) less suitable for providing LSS Greet Vanalme – NL – RIF Session 6 – Paper 0786

  11. Case study: LSS using storage Simulation results: transformer loading Direct control Price based control • Reaction of storage on unbalance signal extra peaks in transformer loading • Price signals induce peak shaving Greet Vanalme – NL – RIF Session 6 – Paper 0786

  12. Case study: LSS using storage • Simulation results: summary • Beneficial effects on transformer loading, voltages and losses within LV network • Distribution networks with a high degree of utilisation (e.g. eHP+ E-car) are less suitable for providing LSS • Possible transformer overloading due to unbalance signal  solution: prioritize congestion signal • Price signals induce peak shaving • Interference between market and congestion signals reduces the responsiveness of the storage units Greet Vanalme – NL – RIF Session 6 – Paper 0786

  13. Case study: LSS using storage Institutional embedding – actor tasks and responsibilities Greet Vanalme – NL – RIF Session 6 – Paper 0786

  14. Conclusions • LSS for “for local” (network alleviation, voltage control,…): suitablebut • No incentive for DSO • Adaptation of tariff system needed • Storage expensive • LSS for “for global” (access to high value markets): more barriers • More complex control scheme needed • More legislative barriers • Actors have no need to implement Greet Vanalme – NL – RIF Session 6 – Paper 0786

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