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电网技术  2015 

三角形连接链式STATCOM三倍频环流优化研究

DOI: 10.13335/j.1000-3673.pst.2015.08.045, PP. 2364-2370

Keywords: 链式换流器,静止无功发生器,三倍频环流,电容电压波动,三角形连接

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Abstract:

三角形连接链式STATCOM的三相桥臂之间存在三倍频环流,为分析三倍频环流的大小及其影响和优化控制方法,首先提出了基于循环耦合关系的解析分析方法,该方法可准确计算出换流器的三倍频环流;其次,应用该解析方法分析了三倍频环流的存在对于链节电容电压波动的影响,并进一步提出了以降低链节电容电压波动和减小所需电容值为目标的三倍频环流优化控制方法,该控制方法可以有效降低装置的体积和成本;最后,通过仿真验证了所提出的解析分析方法和三倍频环流优化控制方法的有效性。

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