A capacity configuration scheme is researched,which applies the hybrid compensation combining the back-to-back single-phase converter with the fixed compensation to achieve the comprehensive control of power quality under the condition of balanced transformer. The capacity of passive compensation for negative sequence and reactive power is analyzed based on its structure and theory. It is proposed that,in order to realize the comprehensive control of power quality, increase the equipment utilization rate and save the investment, the capacity of the hybrid compensation system combining the back-to-back single-phase converter with the fixed compensation should be optimally configured according to the capacity of substation, the characteristics of traction load and the real situation of operation. The analysis of site test results shows that,the hybrid compensation has better effectiveness and its capacity configuration has great influence.%研究了基于背靠背单相换流器与固定补偿(FC)相结合的混合补偿方式在变压器平衡接线方式下实现电能质量综合治理的容量配置方案.基于无源补偿系统的结构和原理,分析了无源补偿负序和无功所需的补偿容量,然后提出根据变电所容量和牵引负荷特点并考虑运行情况,采用优化配置FC和背靠背单相换流器的补偿容量方法,可实现电能质量综合治理并有效提高设备利用率、节约投资.该方案经现场试验测试并通过对比和分析测试结果得出混合补偿方式有较好的补偿效果,同时其容量配置对其治理效果影响较大.
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