Research on regulation strategy of storage-based wind farm after black-start of thermal power unit

doi:10.12028/j.issn.2095-4239.2016.0087

Abstract

Abstract: Parallel operation of a storage-based wind farm and a thermal power unit can play a positive effect on improving the recovery rate of a local power grid is black-started using the wind farm as the power source to drive the thermal power unit. This paper presents a control strategy for such a hybrid system in order to maintain the network stability. In such an approach, the following are proposed: (a) smooth switching control is achieved through following the state of the Battery Energy Storage System (BESS) P/Q controller, and the switching point of the BESS from V/f to P/Q; (b) using an additional inertial controller and an additional frequency droop controller in the BESS control unit to improve frequency stability of the wind-battery-thermal unit hybrid system; and using an additional voltage droop controller in DFIG control unit to improve the voltage stabilith of the wind-battery-thermal unit hybrid network. Simulation results showed that the use of the proposed control strategy can realize smooth switching of BESS control and effectively improve the voltage and frequency stability of the wind-battery-thermal unit hybrid network.

Key words: storage-based wind farm, black-start power source, control strategy switch, additional inertial control

MI Zengqiang1, BAI Jun1, LIU Liqing1, FAN Weidong2, YANG Zaimin2. Research on regulation strategy of storage-based wind farm after black-start of thermal power unit[J]. Energy Storage Science and Technology, 2017, 6(1): 147-153.

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