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一种新型的高压直流输电系统直流侧谐波电压测量方法

, PP. 144-152

Keywords: 高压直流输电,谐波电压,滤波器,阻抗-频率特性

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Abstract:

提出了一种新颖的高压直流输电系统直流侧谐波电压的测量方案。该方案测量流过直流侧滤波器的电流,根据对该电流的谐波分析结果,结合滤波器的元件参数或已知的阻抗-频率特性,即可简单方便地计算得到直流侧的谐波电压。该方法仅需在传统直流滤波器的基础上进行简单改造即可实现,测量电压谐波准确度高,扩展了直流滤波器的功能。并且给出了该方案的原理和谐波电压的计算方法,分析了利用不同滤波器进行谐波电压测量的优劣,研究了滤波器参数变化对谐波电压测量结果的影响,并考虑了不同谐波源叠加的情况。通过仿真计算和实验验证了所提出方法的正确性和有效性。该方法易于实现,计算简单,能够在进行谐波滤除的同时提供高准确度的高压直流谐波电压测量,具有较好的实用价值和应用前景。

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