云南大理光伏±30kV柔性直流输电工程过电压研究与绝缘配合

Research on Overvoltage and Insulation Coordination for Converter Station of ±30 kV Flexible DC Transmission Project in Dali of Yunnan

摘要:

为合理确定±30kV低压柔性直流输电工程设备的绝缘水平和配置避雷器，基于云南大理光伏升压±30kV柔性直流工程，利用PSCAD/EMTDC对工程换流站的暂态过电压进行了计算，并根据计算结果进行绝缘配合研究。研究结果对工程换流站设备的选型和制造具有指导意义，也为低压柔直输电工程的建设提供了参考依据。

Abstract:

In order to decide the insulation level of the equipment in converter station of ± 30 kV flexible low voltage DC transmission project reasonably and configure the lightning arresters, based on Dali photovoltaic boost ± 30 kV flexible DC project in Yunnan, the transient overvoltage of converter station is calculated with PSCAD / EMTDC. According to the calculation results, the insulation coordination is studied. The research results have a significance on guiding the type selection and manufacturing of converter station equipment, and also provide a reference for the construction of flexible low voltage direct transmission project.