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电网技术  2010 

PSD-BPA暂态稳定程序中的新直流输电准稳态模型

, PP. 62-67

Keywords: 高压直流输电,准稳态模型,控制系统,换相失败,低压限流,电力系统稳定,仿真

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Abstract:

为适应大量直流输电工程投产的需要,为电网运行和规划设计等部门提供准确的分析研究手段,对暂态稳定程序中的两端直流输电模型进行深入研究,改进了直流输电系统的模拟方法。在国内广泛应用的PSD-BPA暂态稳定程序中增加一组新的直流输电控制系统模型。新模型中的定电流、定熄弧角、定电压等控制采用参数和特性易于调节的比例积分模块,电流定值计算、低压限流、逆变侧换相失败等主要环节的模拟与实际系统特性更为相近。仿真结果表明,与国内程序原有的直流输电模型相比,新模型能更准确地模拟直流输电系统的动态行为,提高暂态稳定仿真的准确度。

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