Title :
Zero Sequence Parameters Measurement for Ineffectively Earthed Power Systems
Author :
Xiangjun Zeng ; Li, K.K. ; Chan, Wei Liat ; Hongjiang Ma
Author_Institution :
Sch. of Electr. & Inf. Eng., Changsha Inst. of Technol., Hunan
Abstract :
Most distribution systems utilize ineffectively grounded sources to restrict the residual current for single-phase ground fault, so as to reduce outage and shock hazard. In practice, with the system expansion and topology changing, the residual current and zero sequence voltage of ground fault varies dynamically, so that some arcing ground faults easily cause over-voltage and induce multiple faults. In order to improve it, a new method for zero sequence parameters measurement based on the principle of resonance measurement is proposed in this paper. And the prototype for zero sequence parameters measurement has been developed, which has been tested in power system for several years. Results show that the zero sequence parameters measurement is with high precision and can be used for incipient fault detection and predictive maintenance
Keywords :
earthing; fault diagnosis; hazards; maintenance engineering; overvoltage; power distribution faults; power distribution protection; power system measurement; arcing; distribution systems; earthed power systems; incipient fault detection; over-voltage; predictive maintenance; residual current; resonance measurement; shock hazard; single-phase ground fault; zero sequence parameters measurement; Electric shock; Hazards; Power measurement; Power system dynamics; Power system faults; Power system measurements; Prototypes; Resonance; Topology; Voltage; Ineffectively earthed power system; Maintenance for distribution systems; Parameters measurement; Resonance measure;
Conference_Titel :
Transmission and Distribution Conference and Exhibition: Asia and Pacific, 2005 IEEE/PES
Conference_Location :
Dalian
Print_ISBN :
0-7803-9114-4
DOI :
10.1109/TDC.2005.1547103