基于分布式电源主动控制的配电网合环电压波动抑制方法  

Loop-closing voltage fluctuation suppression method of distribution network based on active control of distributed generators

作　　者：欧阳金鑫[1] 陈纪宇 袁毅峰 许守东 OUYANG Jinxin;CHEN Jiyu;YUAN Yifeng;XU Shoudong(State Key Laboratory of Power Transmission Equipment&System Security and New Technology,Chongqing University,Chongqing 400044,China;Dongguan Power Supply Bureau of Guangdong Power Grid Corporation,Dongguan 523009,China;Electric Power Research Institute,Yunnan Power Grid Co.,Ltd.,Kunming 650217,China)

机构地区：[1]重庆大学输配电装备及系统安全与新技术国家重点实验室,重庆400044 [2]广东电网有限责任公司东莞供电局,广东东莞523009 [3]云南电网有限责任公司电力科学研究院,云南昆明650217

出　　处：《电力自动化设备》2024年第1期49-56,共8页Electric Power Automation Equipment

基　　金：重庆市自然科学基金面上项目(cstc2019jcyjmsxmX0321)。

摘　　要：配电网合环操作可能导致节点电压波动甚至越限,不仅影响负荷的正常运行,还威胁分布式电源(DG)的安全。为此,提出了一种通过DG主动控制,以抑制配电网合环电压波动的新思想。通过分析合环过程中电压波动的产生机理和影响因素,量化了抑制合环过程电压波动的控制需求,进而构建了抑制合环电压波动的DG可行功率集;通过刻画DG的功率可控范围,提出了基于可行功率集与功率可控范围交集判别的DG最优控制点计算方法,并提出了基于DG主动控制的配电网合环电压波动抑制方法。算例表明,该方法能够最大限度上抑制配电网故障恢复过程的合环电压波动,有效提升故障恢复过程的安全性和可靠性。The loop-closing operation of the distribution network may lead to node voltage fluctuation or even limit crossing,which may not only affect the normal operation of the load,but also threaten the safety of distributed generator(DG).Aiming at this problem,a new idea for suppressing loop-closing voltage fluctua⁃tion based on DG active control in the distribution network is proposed.By analyzing the generation mechanism and influencing factors of voltage fluctuations in the process of loop closing,the control require⁃ments for suppressing loop-closing voltage fluctuation is quantified,and the feasible power range of DG that suppresses the loop-closing voltage fluctuations is constructed.By portraying the controllable power range of DG,the calculation method of control reference value of DG based on the intersection of feasible power range and controllable power range is proposed.The method of loop-closing voltage fluctuation suppression of distribution network based on active control of DG is proposed.The results of case study show that the proposed method can suppress the loop-closing voltage fluctuation of the fault restoration to the maximum extent,and effectively improve the safety and reliability of the fault restoration.

关 键 词：主动配电网 分布式电源 故障恢复 电压波动 功率控制 

分 类 号：TM76[电气工程—电力系统及自动化]