基于电池储能配置的直流系统失压补偿控制方法研究

Research on DC system voltage loss compensation control method based on battery energy storage configuration

在失压故障发生时,蓄电池能够及时补充电能,避免系统中断。提出一种基于蓄电池容量配置的变电站直流系统失压故障补偿方法。通过配置蓄电池容量,设计变电站直流系统失压故障补偿方法,基于流入节点功率计算变电站直流系统潮流,获取失压故障发生后的零序电阻和分布电容,结合潮流方程中的有功、无功功率计算变压器无功补偿,完成变电站直流系统失压故障的补偿,从而降低配电线路的损耗。实验测试结果表明,该补偿方法不仅可以提高配电线路的使用率,还可以降低配电线路的损耗,具有更好的故障补偿效果。

When a voltage loss fault occurs,the battery can replenish electrical energy in a timely manner to avoid system interruption.In this paper,a voltage loss fault compensation method for DC system of substation based on battery capacity configuration was proposed.By configuring the battery capacity,the substation DC system voltage loss fault compensation method was designed,the power flow of the substation DC system was calculated based on the power of the inflow node,the zero sequence resistance and distributed capacitance after the voltage loss fault oc⁃curs,the zero sequence resistance and distributed capacitance after the occurrence of the voltage loss fault were ob⁃tained,and the reactive power compensation of the transformer was calculated by combining the active and reactive power in the power flow equation to complete the compensation of the voltage loss fault of the DC system of the sub⁃station,so as to reduce the loss of the distribution line.The experimental test results indicate that the compensa⁃tion method can not only improve the utilization rate of distribution lines,but also reduce the loss of distribution lines,and has a better fault compensation effect。