基于BPA数据的交流系统谐波阻抗等值方法研究与应用  

Harmonic impedance equivalent calculation based on BPA data for AC system and its application

作　　者：吴方劼[1] 史梦梦 胡志坚[2] 王小飞[2] 陈彬[2] 汤鹏[2] 邱骁奇 

机构地区：[1]国网北京经济技术研究院,北京102209 [2]武汉大学电气工程学院,湖北武汉430072

出　　处：《电力自动化设备》2016年第8期149-156,共8页Electric Power Automation Equipment

基　　金：高等学校博士学科点专项科研基金资助项目(20110141110032)~~

摘　　要：换流站母线处谐波阻抗值可为直流输电系统中滤波器的设计提供参数依据,对抑制系统谐波至关重要。在完善发电机、变压器、线路、母线负荷等电气元件谐波阻抗模型的基础上,研究基于中国版BPA数据的系统谐波阻抗等值计算方法。提出基于半动态-遗传算法的节点编号优化方法,利用连线矩阵改进节点导纳矩阵的形成,采用稀疏矩阵技术中的排零存储和排零运算提高程序的运行效率。用PSCAD对标准的IEEE 9节点系统进行仿真,验证了所提方法的正确性和有效性。根据电网BPA数据,对某特高压直流输电工程的谐波阻抗进行阻抗扫描,在N-0、N-1及N-2开断方式下分别对丰大、丰小、枯大、枯小运行方式进行谐波阻抗计算,得到了阻抗随频率变化的阻抗图及扇形包络图,为该地区特高压直流输电系统的交流滤波器参数设计提供了依据。The harmonic impedance at the bus of converter station is a critical parameter in the filter design of HVDC transmission system for suppressing harmonics. The electric element harmonic impedance models are improved for generator,transformer,line and bus load ,based on which,the method for calculating the system harmonic impedance equivalent is researched based on the BPA data of China version. A node numbering optimization method based on the semi-dynamic genetic algorithm is proposed,the connection matrix is adopted to improve the formation of node admittance matrix,and the zero-exclusive storage ＆ operation of sparse matrix technology are used to improve the operational efficiency of program. PSCAD simulation is carried out for the standard IEEE 9-bus system to verify the correctness and effectiveness of the proposed method. Based on the BPA data,the harmonic impedance equivalent of a HVDC transmission system is calculated respectively for three switching patterns,i.e. N-O,N-1 and N-2,in four operating modes,i.e.,flood season large power flow,flood season small power flow,dry season large power flow and dry season small power flow,by which,the impedance-frequency chart and the fan-shaped envelope diagram are obtained for the AC filter parameter design of that UHVDC transmission system.

关 键 词：谐波阻抗 等值 特高压输电 元件阻抗模型 BPA数据 半动态-遗传算法 

分 类 号：TM762[电气工程—电力系统及自动化]