配电网电压无功综合补偿负载不平衡电容调节方法研究  

Study on Capacitance Regulation Method in Case of Unbalanced Load for Reactive Comprehensive Compensation of Distribution Network Voltage

作　　者：王波安 Wang Bo’an(Wuhai Electric Power Bureau of Inner Mongolian Electric Power(Group)Co.,Ltd.,Wuhai Nei Mongol 016000,China)

机构地区：[1]内蒙古电力(集团)有限责任公司乌海电业局,内蒙古乌海016000

出　　处：《电气自动化》2021年第1期98-101,共4页Electrical Automation

摘　　要：配电网电压无功补偿受主电路结构影响,易产生节点电容负载不平衡现象。设计一种配电网电压无功综合补偿负载不平衡电容调节方法。建立补偿装置模型,设计4支路变流器主电路结构并统一为T型电路结构,完成各参数计算。为减少功率损耗、确定补偿点位置,利用补偿当量确定补偿容量,提高配电网的多种运行指标,引入电容的调节算法配合电源共同调压,改变无功投入的容量实现对电压的控制,进而实现电容复杂平衡。试验结果表明,配电网所有节点的电压值都能够达到合格值以上,电容负载不平衡度由60%降低到2.5%,说明设计的方法具有一定的有效性。Under the influence of the structure of the main circuitry,reactive compensation of distribution network voltage would easily lead to unbalanced node capacitance load.A capacitance regulation approach was designed for unbalanced load for reactive comprehensive compensation of distribution network voltage.A compensation device model was established,the main circuit structure of the 4-branch converter was designed as T type,and parameter calculations were completed.In order to reduce power loss,positions of compensation points were determined,compensation capacity was defined by use of compensation equivalent,and various operation indexes of the distribution network were improved.A capacitance regulation algorithm was introduced to support the power source in voltage regulation so as to realize voltage control just by changing the capacity of reactive power input,thus realizing complex capacitance balance.Experimental results showed that the voltage values at all nodes of the distribution network could be maintained above the acceptance level,and capacitance load imbalance dropped from 60%to 2.5%.That indicated that the designed approach was effective to a certain degree.

关 键 词：配电网 电压 无功综合补偿 容量 电容调节 

分 类 号：TM46[电气工程—电器]