Grid Energy Storage System - Australian Energy Storage Alliance
Grid Energy Storage System Yogendra Vashishtha, Network Modernisation Principal Engineer-Asset Innovation & DER [email protected] Acknowledgements: GESS Team (AusNet Services) AusNet Services Electricity transmission network – carrying electricity from power stations to electricity distributors across all of Victoria via 12,800 high voltage towers and approximately 6,500 kilometers of Transmission lines. Electricity distribution network – carrying electricity from the high voltage transmission grid to approximately 620,000 customers across eastern Victoria. This network spans approximately 46,000 kilometers across an area of 80,000 square kilometers. Gas distribution network – transporting gas to approximately 570,000 customers across central and western Victoria. This network spans approximately 9,400 kilometers across an area of 60,000 square kilometers. 2 Demand Management Activities 1 Network Support: C&I Demand Management • Upcoming projects to expand portfolio, enhance dispatch effectiveness and sophistication 2 Network Support: Embedded Generation • Typically 3-5 year arrangement to defer major assets , e.g. new ZSS transformer • A competitive process as mandated by RIT-D for projects > $5M • Utilises DMIS funding 3 Distributed Generation • Project management and design of trials such as battery storage at both a residential and substation level and also the provision of a mobile generation fleet: non network options as per Demand Side Engagement Strategy • EG connections support and updating of policies and procedures for connection of embedded generation in line with market developments 3 Demand Management Incentive Scheme (DMIS) AER (Australian energy regulator), in its 2010 period price determination, has incentivised the DNSPs (‘Distribution Network Service Providers’) to consider DSP to manage network demand. The DMIS consists of two parts: Part A-DMIA (‘Demand Management Innovation Allowance’)-allowance for non-tariff DM program approved under the DMIS. Part B- Recovery of the forgone revenue directly attributable to the implementation of DMIS program approved under Part A of the DMIS. Notes: • Projects and programs eligible for approval under this DMIS must meet the DMIA criteria specified • DMIS is not designed to be the sole or even primary source of funding for the DSP • Capital expenditure made under the DMIA will not be rolled into RAB at the start of next regulatory control period 4 Grid Energy Storage Trial (GESS) 1MW / 1MWh lithium ion 22kV Feeder Key Functions 1MW 5 - - - - Peak Lopping Feeder Islanding Voltage Regulation Phase Balancing Grid Energy Storage Trial (GESS) 6 Grid Energy Storage Trial (GESS) More photos- courtesy ABB Australia 7 8 Executive Leadership Visit GESS Design • Design involves special features like transformer with two LV windings to work with the grid and in island mode. • The trial anticipates a future in which lower battery prices and standardised manufacturing of plant components will reduce the total cost of a system like GESS. • GESS is designed to provide additional supply capacity during high demand periods to offset or defer expensive network upgrades. • It improves the quality of power delivery, providing active and reactive power support and other power quality functions, when connected to the network. • During the trial, located in an industrial estate in Thomastown, the system will connect at 22kV to a local feeder from Watsonia Zone Substation. • Should a section of the network become isolated, GESS can provide power as part of an islanded grid. 9 Grid Energy storage Trial Conclusions to date Disadvantages Advantages 10 - - - - - - - - - - Expensive at the moment Asset life? Innovative ,complicated technology introduced into traditional business Potentially economically viable -when? No emissions Potential competitive NEM market participation Defer network augmentation Improve power quality Mobile Grid Energy storage System Trial Results to date • 2MW Power from the GESS • Transition from Grid Connected to Islanded • Peak Lopping • Power Factor • Peak Lopping plus Power Factor • Voltage Support • Voltage Support plus Peak Lopping 11 Grid Energy storage System Trial Future Trials-Quality of Supply • THD • Negative Sequence Voltages • Load Balance • Flicker 12 Issues to date • Fire • Environmental issues • Council Permits • Stakeholder Management (internal / external) & communication plans • Tariff Metering • Storage environmental issues (fire, temperature ) • Site Development & Security • O&M, training • Commissioning on time March 31, 2015 13
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