含VSC-HVDC的交直流互联系统无功优化策略  

Reactive Power Optimization Strategy for AC/DC Interconnected System with VSC-HVDC

作　　者：洪潮 刘鸣 陈雁 李鹏飞[3] HONG Chao;LIU Ming;CHEN Yan;LI Pengfei(State Key Laboratory of HVDC(Electric Power Research Institute of China Southern Power Grid Company Limited),Guangzhou 510660,China;School of Electrical Engineering,Northeast Electric Power University,Jilin 132012,China;Key Laboratory of Smart Grid of Ministry of Education,Tianjin University,Tianjin 300072,China)

机构地区：[1]直流输电技术国家重点实验室(南方电网科学研究院有限责任公司),广州510660 [2]东北电力大学电气工程学院,吉林132012 [3]智能电网教育部重点实验室(天津大学),天津300072

出　　处：《电力系统及其自动化学报》2020年第11期13-20,34,共9页Proceedings of the CSU-EPSA

基　　金：中国南方电网有限责任公司科技资助项目:实现大电网柔性互联的柔性直流控制和性能要求(ZBKJXM20170068)。

摘　　要：针对含VSC-HVDC的交直流互联系统无功优化问题,提出一种改进的含VSC-HVDC交直流互联系统无功优化模型。首先,对VSC-HVDC的稳态模型进行分析,综合考虑交流线路、换流器、直流线路约束和柔性直流控制方式影响,建立以网损最小为目标的含VSC-HVDC交直流互联系统无功优化模型;然后,为简化优化模型的复数运算,以交流系统的有功功率、无功功率及节点电压平方作为系统的状态变量,构建了改进的含VSCHVDC交直流互联系统无功优化模型,以提高交直流互联系统的无功优化效率。最后,通过修改后的IEEE标准系统进行仿真分析,结果验证了所提方法的正确性和有效性。Aimed at the reactive power optimization problem of an AC/DC interconnected system with VSC-HVDC,an improved reactive power optimization model of this system is proposed in this paper.First,a brief analysis of the steadystate model of VSC-HVDC is carried out.Considering the influences of the AC line,converters,DC line constraints and the control method for VSC-HVDC,a reactive power optimization model of the VSC-HVDC AC/DC interconnected system is established with the minimum network loss as its objective.Then,to simplify the complex operation of the op⁃timization model,the AC system uses the active power,reactive power and the square of the AC nodal voltage as its state variables,and an improved reactive power optimization model of the VSC-HVDC AC/DC interconnected system is built to improve the reactive power optimization efficiency of the AC/DC interconnected system.Finally,the correctness and effectiveness of the proposed method are verified by the simulation analysis of a modified IEEE standard system.

关 键 词：电力系统 交直流互联系统 电压源换流器型直流输电 无功优化 

分 类 号：TM712[电气工程—电力系统及自动化]