降压运行方式下换流变替换运行时电压电流及谐波特性分析  

Analysis on Characteristics of Voltage,Current and Harmonics when Converter Transformer is on the Substitute Operation

作　　者：盛康[1] 刘红太[1] 王颂[1] 左干清[1] 

机构地区：[1]中国南方电网超高压输电公司广州局,广州510663

出　　处：《高压电器》2011年第6期62-66,共5页High Voltage Apparatus

摘　　要：在直流输电工程中,当某台主换流变压器因故障退出运行而投入其备用变后将出现该换流站无相同类型换流变作为备用的情况。因此,对各站间的换流变替换运行进行研究显得十分必要。通过中国南方电网仿真实验室的EMTDC程序以及RTDS实时数字仿真系统仿真计算,笔者对直流系统降压运行情况下换流变替换运行时的电压电流特性以及谐波特性进行了研究,并对限制换流变档位前后的仿真数据进行了分析对比,最终得出结论认为肇庆换流站Y/Y换流变替换到深圳换流站运行后在直流系统降压运行情况下是可行的。In HVDC project, there would be no available backup convert transformers in the convert station whe one backup converter transformer has been put into operation due to one of main converter transformers failur Therefore, it is necessary to study the substitute operation of convert transformers between different stations Through using the EMTDC program and the RTDS Simulation System of CSG Simulation Laboratory, this pape studies the variation of the properties and characteristics of voltage, current and harmonics caused by substitut, operation of convert transformer under the reducing voltage operation. The paper also compares the simulatioJ data with or without the restriction OLTC of convert transformers to get the final conclusion, it is feasible that th, Y/Y converter transformer of Zhaoqing station can be substituted by one of Shenzhen＇s converter transforme under the HVDC system in reducing voltage operation.

关 键 词：换流变压器 替换运行 EMTDC及RTDS仿真 降压运行 电压电流特性 谐波特性 分接头 

分 类 号：TM743[电气工程—电力系统及自动化] TM41