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Problems and counter measures of arc suppression coilin 10 kV distribution system

Ni Hui, Ding Pei, Ma Yunlong, Ai Shaogui, Ma Feiyue, Zhang Qingping

Archives of Electrical Engineering

2019

Vol. 68, nr 1

135--146

The arc suppression coil determines whether it can effectively extinguish the arc when it is grounded in the neutral non-effective grounding system. An artificial grounding test is an importantway to verify its performance. In this study, 13 substations with the 10 kV system in the Ningxia areawere selected and considered. Based on the artificial single-phase grounding test, the residual current, the compensation current and the off-resonance degree were measured in the arc suppression coil, and the performance of the arc suppression coil in the 10 kV system was verified. The experimental results show that the error of arc suppression coil automatic measurement is large, the off-resonance degree is large, the resistive component in the compensation current is excessive, the harmonic component exists in the compensating current and capacitive current. To solve these problems, this paper puts forward the corresponding countermeasures for reference.

A Novel Arc Suppression Coil

Xu B., Zhang J., Cai X.

Przegląd Elektrotechniczny

2013

R. 89, nr 3a

213--217

The arc suppression coil (ASC) is one of the most important devices in distribution networks to obtain the optimal power supply quality. Though there exits many types of ASC, some problems have been still not solved. In order to develop an ASC with rapid and continuous tuning and limited harmonics, this paper proposes a novel type of ASC, which is based on a single phase matrix converter. Due to pulse width modulation (PWM) control, compensating currents can be adjusted in a wide range and the order of harmonics is so high to be filtered easily. Finally, by using PSCAD/EMTDC, simulations are given to illustrate the feasibility and validity of this novel ASC.

W artykule zaproponowano nowy typ dławika gaszącego ASC, bazujący na jednofazowym przekształtniku matrycowym. Dzięki modulacji PWM, możliwe jest generowanie prądów kompensujących o szerokim zakresie, a co za tym idzie skuteczna eliminacja harmonicznych. Wykonano badania symulacyjne w programie PSCAD/EMTDC, weryfikujące skuteczność działania rozwiązania.