计及直流控制特性的混合多馈入直流系统交互作用因子计算方法  

Multi-infeed Interaction Factor Calculation of Hybrid Multi-infeed HVDC System Considering DC Control Characteristics

作　　者：李清 王拓 毛炽祖 李章允 辛业春 江守其 LI Qing;WANG Tuo;MAO Chizu;LI Zhangyun;XIN Yechun;JIANG Shouqi(Maintenance&Test Center,EHV Power Transmission Company,Guangzhou 510663,Guangdong Province,China;Key Laboratory of Modern Power System Simulation and Control&Renewable Energy Technology(Northeast Electric Power University),Ministry of Education,Jilin 132012,Jilin Province,China)

机构地区：[1]超高压输电公司检修试验中心,广东省广州市510663 [2]现代电力系统仿真控制与绿色电能新技术教育部重点实验室(东北电力大学),吉林省吉林市132012

出　　处：《电网技术》2021年第8期3125-3133,共9页Power System Technology

基　　金：国家自然科学基金项目(51677023);南方电网公司科技项目(CGYKJXM20180388)。

摘　　要：为评估混合多馈入直流(hybrid multi-infeed high voltage direct current,HMIDC)系统各换流站间的电压交互作用,提出计及直流控制方式影响的HMIDC系统交互作用因子(multi-infeed interaction factor,MIIF)计算方法。首先,基于电力网络方程,构建小扰动下表征直流系统控制响应特性的直流附加等值运行导纳矩阵;然后,分别推导小扰动条件下VSC-HVDC和LCC-HVDC不同控制方式的直流附加等值运行导纳,提出直流附加等值运行导纳矩阵的计算方法;其次,采用直流附加等值运行导纳矩阵修正原交流系统节点导纳矩阵,获得等值节点阻抗矩阵,进而提出基于等值节点阻抗比的HMIDC系统MIIF指标计算方法;最后,基于PSCAD/EMTDC构建混合双馈入直流系统,验证了计及直流控制特性的HMIDC系统MIIF指标计算方法的有效性,并分析了VSC-HVDC无功出力和交流系统等值阻抗对MIIF指标的影响。In order to evaluate the voltage interaction characteristics between the converter stations of the hybrid multi-infeed high voltage direct current(HMIDC)system,this paper proposes a multi-infeed interaction factor(MIIF)calculation method of the HMIDC system considering DC control characteristics.Firstly,based on the power network equations,a DC additional equivalent operating admittance matrix is constructed that characterizes the control response characteristics of direct current system under small disturbance conditions.Secondly,the DC additional equivalent operating admittances of different control modes of VSC-HVDC and LCC-HVDC are respectively deduced,and the calculation method of the DC additional equivalent operating admittance matrix is proposed.Thirdly,the equivalent nodal impedance matrix is obtained by modifying the AC system nodal admittance matrix with the DC additional equivalent operational admittance matrix.On this basis,a MIIF calculation method of the HMIDC system based on the equivalent node impedance ratio is proposed.Finally,the effectiveness of the MIIF calculation method of the HMIDC system considering DC control characteristics is verified in a hybrid dual-infeed high voltage direct current system constructed in PSCAD/EMTDC,and the influence of reactive power generated by VSC-HVDC and AC system equivalent impedance on MIIF is analyzed.

关 键 词：混合多馈入直流系统 交互作用因子 控制方式 等值节点阻抗比 电压交互特性 

分 类 号：TM721[电气工程—电力系统及自动化]