【摘要】 以外加20Hz交流电源为例,考虑外加电源从中性点注入的方式,分析了在不同中性点接地方式下(经配电变压器高阻接地方式和经消弧线圈接地方式)外加电源内阻对电流判据构成的保护的影响;详细分析了变压器漏抗和消弧线圈漏感对导纳判据构成的保护的影响,并对测量误差进行了对比分析。更多还原

【Abstract】 The paper takes the 20Hz AC source as an example. Under different modes of neutral point ground, considering the rejection mode of outside source from neutral point, the influence of outside sources on the current criterion is analyzed. And the influence that leakage reactance of transformer and leakage induction of extinction coil on the admittance criterions is detailed and its measurement errors are analysed.更多还原