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电网技术  2011 

模块化多电平HVDC输电系统子模块电容值的选取和计算

, PP. 26-32

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Abstract:

从模块化多电平柔性直流输电系统稳态能量交换过程、有功功率控制动态响应特性、暂态能量交换过程及直流双极短路故障时桥臂保护要求4个方面分析了子模块电容值与直流系统运行特性之间的数学关系。根据理论分析结果,给出了模块化多电平子模块电容的选取原则和计算方法。通常根据稳态子模块电压波动和有功功率控制动态响应特性的要求计算子模块电容值,再根据暂态子模块电压波动和桥臂保护的要求进行校验。利用PSCAD电磁暂态仿真模型对设计实例进行了仿真分析,结果表明该设计方法是合理、可行的。

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