【摘要】 电容电压不平衡及其控制是链式静止同步补偿器 (STATCOM)安全可靠运行必须解决的关键问题。文中建立了链式STATCOM的数学模型 ,揭示了电容电压不平衡现象产生的机理 ,正确描述了逆变桥各参数对电容电压分配的影响。基于PSCAD的仿真验证了模型的正确性。该模型对于电压平衡控制策略的设计具有重要意义更多还原

【Abstract】 To keep the DC capacitors’ voltage balance is very important for the reliable operation of cascade STATCOM since DC capacitors of cascade STATCOM are separate. This paper presents a mathematical model to study the mechanism of the happened voltage unbalance. Further more, the impacts of inverter’s parameters on the distribution of capacitors’ voltage are investigated. Simulations verify the correctness of this model and the conclusion has significant contribution to designing controller to balance the voltages.更多还原