交直流系统暂态仿真中换流器的换相过程分析  

ANALYSIS ON COMMUTATION PROCESS OF CONVERTERS IN TRANSIENT SIMULATION OF HYBRID AC/DC POWER SYSTEMS

作　　者：吴红斌[1] 丁明[1] 刘波[1] 

机构地区：[1]合肥工业大学电气与自动化工程学院,安徽省合肥市230009

出　　处：《电网技术》2004年第17期11-14,共4页Power System Technology

基　　金：国家自然科学基金资助项目(59977004);教育部博士点基金资助项目(20020359004)

摘　　要：交流系统故障引发换流器的换相失败是直流系统中常见的故障,在暂态稳定仿真中如何模拟这一过程始终是个难点。文章详细分析了直流系统中整流器、逆变器在换相电压不对称条件下的具体差异,通过对换流器的换相角和实际熄弧角的计算,构造了判别换流器换相失败和3-4运行的详细流程,并结合修改后的EPRI-36节点系统进行了算例分析,The commutation failure of converters is a kind of common fault of DC system when fault of AC system occurs. It is still difficult to simulate this process in transient stability simulation of hybrid AC/DC power. Here, the concrete diversity between rectifiers and inverters in DC system under unsymmetrical converting voltage is analyzed in detail. By means of calculating the converting phase angle and actual extinction angle, a detailed flowchart to distinguish the commutation failure of converters and 3-4 operation mode is constructed. The analysis of calculation example by modified EPRI 36-bus system shows that the presented method is feasible and reasonable.

关 键 词：电力系统 交直流系统 暂态仿真 换流器 换相过程 

分 类 号：TM743[电气工程—电力系统及自动化] TM46