摘要
Siemens根据间隙性接地故障时电网中电力电缆电压电流的变化特点,利用零序电流作为间隙性接地故障发生标识,累积间隙性接地故障的持续时间,建立起热负荷模型,从而实现间隙性接地故障保护灵敏性,准确性。该方法不受电网中性点和接地电阻大小的影响,适用范围广,对各种复杂的电网中的间隙性接地故障同样有效。
On the basis of the typical characteristics of intermittent earth fault current and voltage,the quantity of 3I0 is employed to check the appearance of intermittent earth fault.And then the duration of this fault is cumulated to build the thermal load model so that Siemens intermittent earth fault relay realizes its sensitivity and veracity.The earth resistance and earthed style of network do not influence its features.And so however complex any complex network is,the intermittent earth fault relay can satis...
出处
《继电器》
CSCD
北大核心
2007年第S1期138-140,共3页
Relay
