摘要
为了提高零序电流检测的准确性,提出利用Rogowski线圈三相顺次串联检测零序电流,仿真与实验验证了Rogowski线圈检测电流的准确性。针对稳态零序电流比幅比相法与暂态零序电流比幅比相法两种故障选线方法的互补性,提出了一种组合接地选线方法。在大电阻接地而零序电流较小时,该方法具有较高的灵敏性,可靠性高,具有一定的应用价值。
In order to improve the accuracy of zero sequence current measurement, the method based on three-phase sequential connecting Rogowski coil was presented, simulations and experiments validated the accuracy of Rogowski coil. Based on the complementary of the steady-state zero-sequence current amplitude and phase comparison method and the transient zero sequence current amplitude and phase comparison method in fault line selection, a combination faulty line selection was provided. The method had higher sensitivity and reliability, specially, when the zero sequence current was small during the high resistance grounding.
出处
《高压电器》
CAS
CSCD
北大核心
2013年第3期122-126,共5页
High Voltage Apparatus
关键词
小电流接地系统
零序电流
ROGOWSKI线圈
接地选线
small current neutral grounded system
zero sequence current
Rogowski coil
fault line selection
