摘要
在STATCOM的串联电感和直流电容参数选择不当时,配网电压中的基波负序分量和谐波分量会引起STATCOM串联谐振。利用开关函数的基频模型,建立了直流电压波动分量和交流电流非基波正序分量与配网电压非基波正序分量的解析表达式,提出了以直流电压波动最小或以交流电流非基波正序分量有效值最小为目标的直流电容的优化计算方法。仿真分析了配网电压存在基波负序分量或谐波分量条件下STATCOM直流电压和交流电流的响应特性,仿真结果与理论分析一致。
The negativesequence or harmonic component in supply voltage will cause serious impact on the normal operation of STATCOM, and even lead the resonance phenomena if the series reactance and DC capacitance are un suitable. Based on the switching function of voltage sourced converter under fundamental frequency, the relative ex act calculation mode of fluctuation components in DC side voltage and nonfundamentalpositivesequence compo nents （shorted in NFPSCs） in AC side currents for STATCOM was established. According to the model, the rela tion between DC capacitor and DC voltage fluctuation or the NFPSCs in AC current was analyzed. Respectively tak ing the minimum of the DC voltage fluctuation or the NFPSCs in AC current as the constraint condition, the compu ting method of optimal capacitance of the DC capacitor was presented. Finally, the simulation results coincide well with the theoretical analysis.
出处
《电工电能新技术》
CSCD
北大核心
2013年第4期21-25,共5页
Advanced Technology of Electrical Engineering and Energy
基金
陕西省重点学科建设专项资金资助项目
陕西省工业攻关计划资助项目(2010K09-09)
