基于多阶轨迹灵敏度的交直流混联受端电网无功储备优化方法  

Reactive power reserve optimization method for AC/DC hybrid receiving network based on multi-order trajectory sensitivity

作　　者：齐子杰 陈天华 王彬[5] 葛怀畅[5] 陈建华 徐陆飞 QI Zijie;CHEN Tianhua;WANG Bin;GE Huaichang;CHEN Jianhua;XU Lufei(College of Electric Power Engineering, Shanghai University of Electric Power, Shanghai 200090, China;NARI Group Corporation(State Grid Electric Power Research Institute), Nanjing 210006, China;NARI Technology Co. Ltd., Nanjing 211106, China;State Key Laboratory of Smart Grid Protection and Control, Nanjing 211106, China;Department of Electrical Engineering, Tsinghua University, Beijing 100084, China)

机构地区：[1]上海电力大学电气工程学院,上海200090 [2]南瑞集团(国网电力科学研究院)有限公司,江苏南京210006 [3]国电南瑞科技股份有限公司,江苏南京211106 [4]智能电网保护和运行控制国家重点实验室,江苏南京211106 [5]清华大学电机工程与应用电子技术系,北京100084

出　　处：《电力科学与技术学报》2022年第1期74-81,共8页Journal of Electric Power Science And Technology

基　　金：智能电网保护和运行控制国家重点实验室课题(面向含调相机的大规模交直流电力系统动态电压安全评估及预防控制关键技术)。

摘　　要：电网在换相失败发生期间,会消耗大量的动态无功功率,一旦发生换相失败故障,容易对电网安全运行产生影响。在此背景下,研究如何通过优化交直流混联电网的无功储备,来降低直流换流器换相失败事故扩散的风险。首先,建立交直流混联系统的微分代数方程,在一阶轨迹灵敏度基础上,求取系统的多阶轨迹灵敏度;然后,针对电力系统当前的运行状况,建立含发电机和容抗器的动态无功储备优化模型,求解得到动态无功储备优化的最优解;最后,以某实际系统为模型进行仿真验证,证明该方法的可行性与有效性。During the process of the commutation failure in power grid,a large amount of dynamic reactive power are consumed.Once a commutation failure occurs,it affects the safe operation of the grideasily.Under the background,anreservereactive poweroptimization for AC-DC hybrid power gridsisproposed to reduce the risk of accidental DC commutation failure propagation.Firstly,a differential algebraic equation for the AC/DC hybrid system is established.The multi-order trajectory sensitivity of the system is obtainedon the basis of the first-order trajectory sensitivity.According to the current operating conditions of the power system,a dynamic reactive power reserve optimization model including a generator and a reactor is then established,and the optimal solution of the dynamic reactive power reserve optimization is solved.Finally,a practical system ismodeledto verify the feasibility and effectiveness of the method.

关 键 词：交直流混联电网 换相失败 微分代数方程 轨迹灵敏度 动态无功储备 

分 类 号：TM734[电气工程—电力系统及自动化]