摘要
农村配电距离长,线损大,其导致的线路中端和末端电压不足是目前农村电网的主要难题。设计了一种自耦型农网低电压补偿变压器,该变压器将二次侧串联入主电路,只需要提供该节点的缺失电压即可达到低电压治理的效果,变压器容量小、成本低,可在同一线路多个节点进行配置。各相二次侧分接头由IGBT控制独立,可以治理三相电压不平衡。最后对补偿变压器进行了数字仿真校验以及数字物理混合实验校验,证明了该方法能够保证线路各节点的电能质量,同时与其他低电压治理方法的经济性进行对比分析,验证了补偿变压器具有较高的经济性。
At present,the main problem of rural power grid is the lack of voltage at the middle and end of the line caused by long distance and large line loss.An auto-coupling transformer of low voltage compensation of rural power network was designed.The transformer connects the secondary side in series with the main circuit and only needs to provide the missing voltage of the node to achieve the effect of low-voltage control.The transformer has small capacity and low cost,and can be configured in multiple nodes of the same line.The secondary side taps of each phase are independently controlled by IGBT,which can control the unbalanced three-phase voltage.Finally,the digital simulation verification and digital physical hybrid experiment verification of the compensation transformer were carried out,which prove that this method can guarantee the power quality of each node of the line and at the same time.The transformer was compared with other low voltage control methods in terms of economy,which prove that the compensation transformer seems more economical.
作者
姚宗溥
马崇伟
吉庆文
陈益
贾利利
YAO Zongpu;MA Chongwei;JI Qingwen;CHEN Yi;JIA Lili(State Grid Ningxia Electric Power Co.,Ltd.,Yinchuan 750004,Ningxia,China;Pingluo Power Supply Company,State Grid Ningxia Electric Power Co.,Ltd.,Shizuishan 753400,Ningxia,China;Shanghai Jiuzhou Information Technology Co.,Ltd.,Shanghai 201203,China)
出处
《电气传动》
2021年第17期38-43,共6页
Electric Drive
基金
国家电网公司总部科技项目(5102-201999343A)。
关键词
农村电网
补偿变压器
低电压治理
分接头
经济性
rural power grid
compensation transformer
low voltage control
transformer taps
economy
