PES Webinar - Ancillary Service for Transmission Systems by Tap Stagger Operation in Distribution Networks

IEEE Power & Energy Society Publications Webinar Series

Ancillary Service for Transmission Systems by Tap Stagger Operation in Distribution Networks

19 May 2016 • 11:00 am Eastern

Presented by Dr. Haiyu Li, the University of Manchester, UK

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This Webinar:

With the integration of intermittent renewable generation, transmission voltage problems have become more dynamic. The deployment and tuning of numbers of VAr compensators at various locations may not be cost-effective. This webinar will introduce an alternative method, which utilises the distribution network assets, such as a large number of parallel transformers, to provide reactive power absorption services for transmission systems. The operation of parallel transformers in safe and small different tap positions (i.e. with staggered taps) can provide a means of absorbing reactive power. The aggregated VAr absorption from many pairs of parallel transformers could be used to provide voltage support to the upstream transmission network.

This webinar will discuss both the economic and dynamic impacts of the proposed method. For the economic analysis, the associated costs of applying the tap staggering technique are investigated from the perspective of transmission system operators. In addition, the dynamic impacts of tap staggering on transmission voltages are compared with the switching of shunt reactors. The outcomes from this research could potentially lead to a new reactive power ancillary service involving distribution networks, which may be treated as a smart grid tool to enhance the transmission system VAr management in the future.

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The Presenters:

Dr. Haiyu Li

Dr. Haiyu Li is a Senior Lecturer at the University of Manchester (UoM) and an expert of "Power System Automation and Communication Systems" with emphasis on the applied sciences for the development of more flexible and sustainable power systems or Smart Grid for the future. His previous industry career included 5 years (1985-1989) research and development experience in the First Research Institute of the Ministry of Information Industry in Shanghai, China, and 2 years (3/1998- 1999) R&D experience in AREVA T&D Power System Protection and Control Ltd (formerly ALSTOM), Stafford, UK.

Dr. H. Li had led or involved many research projects, including EPSRC projects of "GPS synchronised wide area current differential protection", "Predicting and optimising reliable performance of distribution systems", National Grid projects of "AS3 architecture design and reliability assessment", "Design and implementation of analogue to digital merging units test bed", and "400kV voltage transformer frequency response test bed”, EDF funded project of "Impedance matching circuit design and optimisation for power line communications", and etc. He had led two Ofgem LCNF funded projects: Tier 1 “Voltage control options on low voltage busbars"; Tier 2 "Customer load active system services - CLASS" with the total value of £9M. Recently he has been the Primary Investigator (PI) for the £300k of National Grid NIA fund for “VSATT” project and £475k from Ofgem award Scottish Power NIC fund “FITNESS” project with the total value of £13M. He has published 80+ Journals and international conferences papers, 2 Technical Brochures in CIGRE and CIRED, and 2 Patents. He is a Member of IEEE and IET and a Chartered Engineer.