试验接线方式对Z型接地变压器变比测试的影响研究

摘要

配电网中常采用从Z型接地变压器的高压侧引出接地点并加装消弧线圈装置的方式来限制单相接地故障电流，以确保电网的可靠性和安全性。通过对不同接线方式下Z型接地变压器变比试验的影响研究，分析了造成不同接线方式下试验结果存在差异的原因，提出了Z型接地变压器变比试验的正确接线方法及注意事项。%In distribution networks, the grounding point is often led out from the HV side of zigzag grounding transformer and equipped with arc suppression coil to limit single-phase earth fault current to ensure power reliability and safety. By research on the effect of various grounding modes on ration test of zigzag grounding transformer, the paper analyzes the causes for different test results in different connection modes and proposes the reasonable connection mode and precautions for ration test of zigzag grounding transformer.