基于STATCOM的三相不平衡潮流补偿技术研究

鉴于STATCOM具有能快速灵活地输出无功功率、稳定电网接入点电压、实现电网的三相平衡化补偿等特性,以电网的电压、电流不平衡度低于国家标准为目标,将STATCOM稳态模型引入三相潮流分析中,探讨了电网应用STATCOM补偿电力系统三相不平衡潮流问题。算例分析结果表明,采用STATCOM进行电力系统三相不对称潮流的平衡化补偿具有较好的效果,可有效降低电网不平衡度以提高电能质量。

Compensation Technology of Three-phase Unbalance Power Flow Based on STATCOM

STATCOM has the ability of outputting the reactive power, stabilizing the voltage of grid access points and compensating the power of three-phase gird quickly and flexibly. According to the steady-state compensation characteristics of the STATCOM, this paper brings the steady-state STATCOM model into three-phase power flow analysis and discusses three-phase unbalanced power flow compensation by adopting the STATCOM based on the goal that the grid voltage and current imbalance should be lower than that of the national standard. The result shows that the reactive power compensation for three-phase unbalanced gird can effectively reduce the degree of power imbalance as well as improve the power quality.