计及潮流转移特性的直流潮流控制器优化配置

直流电网的潮流可控支路数遵循N?1原则，在线路上安装直流潮流控制器可提升直流电网的潮流控制自由度。现有关于直流潮流控制器配置的研究都只关注其稳态特性，考虑到直流系统发生断线故障可能导致线路过载，从潮流转移的角度提出一种新的直流潮流控制器配置方法。建立安装直流潮流控制器后的直流电网数学模型，应用灵敏度分析结合潮流分布情况确定直流潮流控制器安装位置，提出直流系统潮流转移熵，结合直流系统加权潮流熵对直流潮流控制器进行优化。仿真结果显示，在不同运行方式下，采用所提方法进行优化不仅能改善潮流分布，还能优化直流线路的潮流转移特性，且N?1故障后重载线路的平均负载率明显降低，验证了所提方法的有效性。

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

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.