分布式潮流控制器提升最大输电能力期望和供电可靠性的效能研究

Research on Efficiency of Distributed Power Flow Controller to Improve Expected Total Transfer Capability and Power Supply Reliability

由于统一潮流控制器的广泛应用受制其可靠性及成本高昂等不足,分布式潮流控制器（unified power flow controller,DPFC）应运而生。为分析DPFC提升最大输电能力期望和供电可靠性的效能,需要将该装置纳入大电网可靠性评估中。针对其分布式串联侧进行结构解析,从而确定DPFC的运行状态及空间转移模型,通过马尔科夫过程可求解出DPFC各状态平稳概率与故障/修复率。基于此,建立含DPFC的系统潮流计算模型,并提出从断面最大输电能力期望和供电可靠性两大角度来综合评价DPFC效能的研究方法。经IEEE-RTS79算例分析表明：所述方法能够有效评价DPFC在电网可靠性方面的改善能力,可以从可靠性角度来确定DPFC最优配置方案,从而为实际工程提供一定指导意义。

Due to insufficient reliability and high cost of unified power flow controller（UPFC）, distributed power flow controller（DPFC） is developed. In order to analyze effectiveness of DPFC in enhancing expected total transfer capability and power supply reliability of power grid, it is necessary to integrate DPFC into grid reliability assessment. Operation state of DPFC and its state-space transfer model are determined by structural analysis of its distributed serial side. Then, state probability and transfer rate of DPFC can be solved with Markov process. Based on above, a power flow calculation model integrated with DPFC is established, and a reliability evaluation method for DPFC performance is proposed from two aspects： the expected total transmission capability and the power supply reliability. Finally, IEEE-RTS79 analysis shows that the method can effectively evaluate improvement capability of DPFC in grid reliability. And the evaluation results can provide some guidance for practical engineering.