考虑换流变压器变比调节的交直流系统分布式动态潮流  

Distributed Dynamic Power Flow for AC/DC Interconnected Power Grid Considering Converter Transformer's Tap Changer Regulating

作　　者：张海波[1] 张晓云[1] 

机构地区：[1]华北电力大学电力系统保护与动态安全监控教育部重点实验室,北京市102206

出　　处：《电力系统自动化》2011年第7期19-23,共5页Automation of Electric Power Systems

基　　金：国家自然科学基金资助项目(50807014);"电力系统及发电设备安全控制和仿真国家重点实验室"开放课题资助项目(SKLD09KM08)~~

摘　　要：交直流电网互联在一起,而调度中心采用独立计算模式,二者之间存在矛盾,给电网分析和监控带来种种弊端。在基于异步迭代模式的以高压直流线路为联络线的分布式动态潮流算法(ADDPF)的基础上,补充提出了考虑换流变压器变比调节的交直流互联系统ADDPF算法。通过将直流边界节点状态量选为交流母线电压幅值、相角及换流变压器变比,增加构建了基于换流变压器变比的不动点迭代格式,实现了考虑换流变压器变比调节的交直流互联系统动态潮流计算。将IEEE标准系统扩展为交直流互联系统进行测试,数值试验表明所提出的调整方法能够在分布式潮流计算中使每个子系统获得与全网一致的分接头挡位,进而获得与全网一致的动态潮流解。The contradiction between AC/DC interconnected power grid and independent calculation mode adopted by regional control centers,brings in various drawbacks to the analysis and monitoring of a power network.Based on the distributed dynamic power flow for an AC/DC interconnected power grid with asynchronous iteration mode,asynchronous iteration for an AC/DC interconnected power grid considering converter transformer＇s tap changer regulating is proposed.The AC bus voltage magnitude,phase angle and converter transformer turns ratio are taken as state variables of DC boundary nodes,the proposed algorithm is realized by increasing a fix-point iteration about converter transformer turns ratio.The numerical simulation for an AC/DC interconnected system extended by IEEE standard system show that the converter transformer turns ratio of each subsystem obtained by the proposed algorithm is the same as that of the whole network dynamic power flow calculation,and then the dynamic power flow solution consistent with the whole network can be obtained subsequently.

关 键 词：交直流互联系统 分布式潮流计算 异步迭代 换流变压器 变比调节 

分 类 号：TM744[电气工程—电力系统及自动化]