变电站设计中电压互感器选择有关问题分析  

Analysis of Some Related Selection Problem about Potential Transformer in Substation Design

作　　者：李乐 李英武[2] 袁野[3] 

机构地区：[1]南京因泰莱电器股份有限公司,江苏南京211100 [2]中国航空工业规划设计研究院,北京100011 [3]中国电子科技集团公司第二十八研究所,江苏南京210007

出　　处：《低压电器》2014年第8期61-65,共5页Low Voltage Apparatus

摘　　要：电压互感器的接线方式与测量精度选择不合理,会直接影响到电压、功率以及电能测量的精确度。针对问题对电压互感器的接线方式、测量精度与容量,及其表示方法等有关问题进行了分析。分析结果表明,电源中性点不接地供配电系统的所有电气设备的绝缘都需要按照线电压进行设计,电压互感器一次侧中性点必须接地,二次侧中性点是否接地根据需要来选择。To select the connection way and measurement accuray of a potential transformer unreasonably will directly affect the measurement accuracy of its voltage, power and energy. This paper analyzed some problems about connection way, measurement accuracy, capacity of a potential transformer and its representation. The results show that the insulation of all electric equipment in supply and distribution system with ungrounded neutral point need to design according to line voltage. The primary side neutral point of a potential transformer must be grounded. Whether the secondary side neutral point is grounded or not will depend on the need.

关 键 词：电压互感器 测量精度 V/V型接线 Y/Y/△接线 零序电压 

分 类 号：TM451[电气工程—电器]