直流电网电压控制器的参数计算方法  

Controller Parameters Calculating Method of DC Voltage Loop for DC Grid

作　　者：李云丰[1] 汤广福 庞辉 吴亚楠 贺之渊 安婷 

机构地区：[1]中国电力科学研究院,北京市海淀区100192 [2]先进输电技术国家重点实验室(全球能源互联网研究院),北京市昌平区102200

出　　处：《中国电机工程学报》2016年第22期6111-6121,共11页Proceedings of the CSEE

基　　金：国家电网公司科技项目(SGRIZLKJ[2015]457);Science and Technology Project Supported by the State Grid Corporation of China(SGRIZLKJ[2015]457)

摘　　要：合适的定直流电压控制器参数是保证直流电网有效运行的前提。文章基于戴维南等效模型推导了单个换流站输出直流电压的小干扰数学模型,并结合直流电网网络方程,建立了直流电网通用小干扰数学模型。为了便于对定直流电压控制外环控制器参数进行定量计算,文章提出了一种直流电网等效方法。该方法能够在基本不影响直流电网运行特性的基础上使得原始直流电网数学模型的阶数得到最大程度简化,从而有利于实现定直流电压控制器参数的定量计算。文章以五端直流电网为例,建立直流电网电磁暂态仿真模型与小干扰数学模型计算程序,验证了所建立小干扰数学模型以及控制器参数设计的正确性。The reasonable parameters in constant DC voltage controller are the prerequisite of DC grid for effectiveness operation. Combined the network equation of DC grid with the small signals mathematical model of single converter＇s DC output voltage based on Thevenin equivalent model, the generic small signals mathematical model of DC grid was established. In order to achieve the quantitative calculation of controller parameters in the outer loop of constant DC voltage control station, an equivalent method was proposed in this paper. This method, which gives convenience to realize the parameters quantitative calculation of dc voltage controller, can reduce the order of original DC grid mathematical model greatly with scarcely influence on the operational performance of DC grid. Based on a five-terminals dc grid, an electromagnetic transient simulation model and small signals mathematical model calculating program for DC grid were established, the simulation results of which verify the correctness of the small disturbance model and the parameters quantitative calculating method.

关 键 词：模块化多电平换流器 高压直流输电 直流电网 小干扰 等效模型 戴维南等效模型 

分 类 号：TM46[电气工程—电器]