摘要
实际电网常有三相电压不平衡现象发生,严重影响大功率电压源型变换器(VSC)的稳定运行能力,在VSC参数设计时应予以充分考虑。已有研究表明VSC参数选取与电网相电压幅值有关,文中对此分析了表征电网电压不对称状况下的不平衡度与相电压跌落深度的关系,提出了基于电网电压不平衡程度的VSC参数设计方法。给出了与不平衡度、系统容量等具有工程实际意义的相关参数的解析表达式,并通过仿真验证了所提出的参数设计方法的合理性,为VSC的参数选择提供了工程实用算法。
The influence of three-phase voltage unbalance should be taken into account in the design of voltage sourced converter （VSC）, which may be seriously affected in terms of the operation stability. According to the literature available, the parameters of VSC should be chosen on the basis of the grid voltage magnitude, the relationships between the unbalance factor and the dip depth of grid phase voltage under different unbalance conditions are analyzed, mathematical expressions of the system parameters are deduced from the perspective of the unbalance factor. The rationality of the optimization method is verified by simulation results.
出处
《电力系统自动化》
EI
CSCD
北大核心
2012年第2期91-95,100,共6页
Automation of Electric Power Systems
基金
国家高技术研究发展计划(863计划)资助项目(2007AA05Z419)~~
