Real-Time Dispatch of Coupled Transmission and Distribution Systems within a Distributed and Cooperative Framework

Lingshu Zhong and Lin Guan
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Lingshu Zhong: Department of Electric Power, South China University of Technology, Guangzhou 510641, China
Lin Guan: Department of Electric Power, South China University of Technology, Guangzhou 510641, China

Energies, 2020, vol. 13, issue 20, 1-15

Abstract: This paper presents a real-time dispatch strategy for coupled transmission and distribution systems within a distributed and cooperative control framework to maintain reliable and secure operation with minimum generation costs and maximum renewable energy consumption. The presented strategy transforms each distribution system into a dispatchable active source via an average-consensus-based active power control of renewable distributed energy resources (DERs) at the distribution level and then dispatches the active power reference of conventional generators as well as the distribution systems in a measurement-based way at a transmission level. The voltage fluctuation caused by the DER active power control is smoothened with a distributed voltage control method, which can also reduce the active power loss in the distribution systems. Compared to existing real-time dispatch strategies, the proposed strategy can eliminate security issues in the transmission system in a short time by regulating large amounts of DERs at a distribution level in a simple and easy controlled structure, in which the differences in the communication conditions and privacy requirements between the distribution and transmission systems are adequately considered.

Keywords: real-time dispatch; distributed optimization; security-constrained economic dispatch; renewable energy resources (search for similar items in EconPapers)
JEL-codes: Q Q0 Q4 Q40 Q41 Q42 Q43 Q47 Q48 Q49 (search for similar items in EconPapers)
Date: 2020
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