380v直接接入式三相三线电能表的计量误差分析

Analysis of 380v Direct Access to Three-Phase Three-Wire Watt-Hour MeterMeasurement Error

针对电网中380v三相四线供电低压用户还存在用三相三线电能表的情况,对380v系统直接接入式三相三线电能表用在三相四线系统中的各种运行工况的计量误差分析。从理论上分析包括各种单相负荷、两相负荷、三相负荷情况的误差,得出量化的误差数值,以此引起供电部门重视,促使违反规程使用三相三线电能表计量三相四线系统电能的情况进行整改。此分析对追补电量的计算亦有一定的参考价值。

For the cases grid power supply 380v three-phase four-wire low-voltage users are still using four-wire three-phase energy meter, the paper analyzes the measurement error of three-wire three-phase energy meter with a three-phase four-wire system that direct access to the 380v system in a variety of operating conditions. Theory analysis includes a variety of single-phase loads, two-phase loads, three-phase loads of error, quantization error values obtained, to cause great importance to the electricity sector to promote the use of order to phase 3 phase 4 wire energy meter line system of energy to rectification. The analysis of retrospective power calculations have some reference value.