Y/yn接线变压器带单相负载的计量原理分析

Measurement Principle Analysis of Y/yn Transformer with Single-phase Load

在10 kV供电系统中,Y/yn变压器运用相当广泛,在10 kV侧采用三相三线计量方式的用电客户较多,运行中0.4 kV侧可能接入单相负载,出现极端不对称运行情况,主要运用对称分量法分析这种运行状态下,10 kV侧三相三线制计量装置的计量原理。

Y/yn transformer is widely used in 10 kV power supply system. Most consumers adopt the three - phase three - wire measurement on its 10 kV side. In this way, the 0.4 kV side of such transformer may connect to single - phase load, and bring on the extreme asymmetric operation. Under such operating condition, the measurement principles of three - phase three -wire metering are analyzed by symmetrical component.