交直流输电系统静态电压稳定性研究  

Study on Static Voltage Stability of Alternative and Direct Current Power Transmission Systems

作　　者：陈跃涛[1] 程汉湘[1] 彭琼[1] 石信语[1] 王刘拴[1] 赵建青[2] 

机构地区：[1]广东工业大学,广东广州510006 [2]广东电网公司江门供电局,广东江门529030

出　　处：《广东电力》2014年第2期60-64,共5页Guangdong Electric Power

基　　金：广东省教育厅电力节能与新能源技术重点实验室资助项目(IDSYS200701);广东电网公司科技项目(K-GD2012-457)

摘　　要：给出了交直流系统相互作用的简化模型,在此基础上介绍了短路比法、最大功率法和电压稳定性指标法,并以国内某在建±800 kV高压直流输电工程为研究对象,利用PSCAD/EMTDC仿真软件建立仿真模型,并进行双极全压启动跟逆变侧无功动态变化仿真。理论分析跟仿真结果均表明交流系统越强静态电压稳定性越好;逆变器采用定直流电压控制时交直流系统静态电压稳定性较好,通过跟其他控制方式的配合,可较准确地模拟实际±800 kV高压直流输电系统。This paper proposes a simplified model for interaction between alternative and direct current systems. Meanwhile, it introduces short circuit ratio method, maximum power method and voltage stability index method on the basis of the above model. Taking some domestic ± 800 kV high voltage DC power transmission engineering as study object and using PSCAD/ EMTDC simulation software to establish simulation model, it proceeds simulation on bipolar with full voltage startup and dy- namic change of reactive power in inverter side. Theoretical analysis and simulation result indicate that static voltage stabili- ty may be better with stronger AC system, static voltage stability of AC and DC current systems is better when using constant DC voltage control for the inverter. In addition, by coordinating with other control ways, it is able to be more correctly simulate practical ± 800 kV high voltage DC power transmission system,

关 键 词：交直流输电 电压稳定性 有效短路比 控制方式 仿真模型 

分 类 号：TM744[电气工程—电力系统及自动化]