Title :
Zero-Cross Triggering Technology of Series SCRs with Optical Fiber at Medium Voltage: Application for Thyristor Switched Capacitor
Author :
Ai-Jun, Hu ; Fei, Shen ; Wen-Jin, Cui
Author_Institution :
Dept. of Electr. Eng., Tsinghua Univ., Beijing
Abstract :
With the development of power electronics technology, more and more power electronic facilities have been used in power system. The valve stack of series SCRs is the key to realize the dynamic VAr compensation with thyristor-switched-capacitor at medium voltage distribution network. This paper presents a firing technology as a solution for MV TSC. TSC with "transient-free" switching process is analyzed and zero-cross gating technology is required. Optical fiber and series zero-cross optoisolators triac drivers are adopted as parts of triggering system to solve the problems of isolating, zero-cross detection, gating energy, etc.. The performance of this triggering system was tested by field experiments, which showed satisfied effectiveness and certified its validity to be used as the executive component of TSC
Keywords :
capacitor switching; compensation; distribution networks; optical fibres; opto-isolators; thyristor applications; trigger circuits; dynamic VAr compensation; firing technology; medium voltage distribution network; optical fiber; power electronics technology; series SCR; series zero-cross optoisolators triac drivers; thyristor switched capacitor; transient-free switching process; triggering system performance testing; zero-cross detection; zero-cross triggering technology; Capacitors; Isolation technology; Medium voltage; Optical fibers; Power electronics; Power system analysis computing; Power system dynamics; Power system transients; Thyristors; Valves; Medium Voltage TSC; Optical Fiber; Series SCRs; Zero-cross Triggering;
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.2005.1546804