基于MMC平均值模型的柔性直流输电系统海底电缆故障过电压计算  

Overvoltage Calculation of Submarine Cable in VSC-HVDC Systems Based on MMC Average Value Model

作　　者：章正国[1] 张健[1] 宣羿 徐政[2] 

机构地区：[1]国网浙江省电力公司舟山供电公司,浙江舟山316021 [2]浙江大学电气工程学院,杭州310027

出　　处：《高压电器》2014年第2期99-104,共6页High Voltage Apparatus

摘　　要：模块化多电平换流器(modular multilevel converter,MMC)具有调制简单、开关频率低、谐波分量小等优点,在柔性直流输电系统,尤其是跨海域的电能传输中得到了广泛的应用。笔者采用了MMC换流站平均值模型,提出了一种简化的计算海底电缆直流故障时过电压的计算方法,节省了计算量,仿真结果与详细模型十分接近。Modular multilevel converter has the advantage of simple modulation, low switching-frequency and low harmonic components. It has been widely used in VSC-HVDC systems, especially in power transmission across sea. This paper introduces an MMC average value model, and presents a simplified method for calculating the overvoltage of submarine cable during the process of DC faults, which reduces the computational burden. The simulation results show that the average value model has good consistency with that of the detailed model.

关 键 词：MMC 柔性直流输电系统 海底电缆 平均值模型 过电压 

分 类 号：TM721.1[电气工程—电力系统及自动化]