DocumentCode :
1610460
Title :
Calculation method for voltage distribution of the controlled metal oxide arrester
Author :
Chen Xiu-juan ; Chen Wei-jiang ; Shen Hai-Bin ; He Zi-ming ; Chen Li-dong ; Che Wen-jun ; Song Ji-jun
Author_Institution :
Nat. Natural Sci. Found. Key Subject of China, China
fYear :
2010
Firstpage :
1
Lastpage :
4
Abstract :
Equivalent capacitance of thyristor used in thyristor valve of the controlled metal oxide arrester (CMOA, shortly), CT, changes with thyristor terminal voltage, φT. When voltage distribution of CMOA is calculated, such characteristic should be considered. Combining field-circuit combination method and variable rule of CT with φT, a calculation program was put forward. Firstly, electric field numerical calculation models of MOA1, MOA2 and MOR were made and an equivalent capacitance network was calculated. Then function of CT and φT was solved by test and curve fitting. Secondly, equivalent circuit of CMOA was founded. The function of CT and φT was substituted to the circuit. Function between electrode voltage, φFi, and CMOA voltage, φs could be calculated by iterations. Finally, the function between φFi and φs was substituted to electric field numerical calculation model and variable rule of voltage distribution by φs was solved. The calculation program was verified by tests. Results indicated that it was effective to calculate voltage distribution of CMOA.
Keywords :
arresters; capacitance; curve fitting; equivalent circuits; thyristor applications; voltage distribution; CMOA; controlled metal oxide arrester; curve fitting; electric field numerical calculation; equivalent capacitance; equivalent circuit; field-circuit combination method; thyristor valve; voltage distribution; Books; Channel hot electron injection; Finite element methods; Power transformer insulation; CMOA; calculation model; circuit; electrode; equivalent capacitance; equivalent capacitance network; field-circuit combination method; function; program; test; thyristor valve; voltage distribution;
fLanguage :
English
Publisher :
ieee
Conference_Titel :
Power System Technology (POWERCON), 2010 International Conference on
Conference_Location :
Hangzhou
Print_ISBN :
978-1-4244-5938-4
Type :
conf
DOI :
10.1109/POWERCON.2010.5666404
Filename :
5666404
Link To Document :
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