Optimal Configuration Method for DC Power Flow Controller Considering Power Flow Transfer Characteristics

doi:10.11930/j.issn.1004-9649.202003110

Abstract

Abstract: The number of DC power flow controllable lines follows the N−1 principle. Installing DC power flow controller (DCPFC) on the line can improve the controllability of line power flow. The existing research on the configuration of DC power flow controller only focuses on its steady characteristics. Considering that the line overload may be caused by disconnection fault in DC system, a novel configuration method for DC power flow controller is proposed from the power flow transfer principle. A mathematical model of DC power grid with DC power flow controller is established. The installation position of DC power flow controller is determined by sensitivity analysis combined with power flow distribution. The power flow transfer entropy of DC system is proposed, and the DC power flow controller is optimized based on the weighted power flow entropy of DC system. The simulation results show that under different operation modes, the proposed method can not only improve the power flow distribution, but also optimize the power flow transfer characteristics of DC lines, and the average load rate of heavy lines after N–1 fault is significantly reduced, which verifies the effectiveness of the proposed method.

Key words: DC power flow controller, mathematical model of DC grid, weighted power flow entropy, power flow transfer entropy, sensitivity method

CHEN Ruochen, ZHANG Yingmin, LIU Qilin, LIU Tianqi. Optimal Configuration Method for DC Power Flow Controller Considering Power Flow Transfer Characteristics[J]. Electric Power, 2021, 54(1): 47-53,149.

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URL: https://www.electricpower.com.cn/EN/10.11930/j.issn.1004-9649.202003110

https://www.electricpower.com.cn/EN/Y2021/V54/I1/47

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