Title :
Development of an opto-electrical probe for measuring impulse high-voltage across thyristors in HVDC valve of three-Gorges project
Author :
Zhao, Zhongyuan ; Lu, Zhengyu ; Gu, Yilei ; Qiu, Yuchang
Author_Institution :
Nat. Lab. of Power Electron., Zhejiang Univ., Hangzhou, China
Abstract :
A high-voltage resistive probe is developed to measure impulse voltage (1.2/50μs) distribution along thyristor units in HVDC converter valve with an optoelectronic system to transmit the measured signal. A pulse frequency modulation (PFM) mode is adopted for this transmitting system, owing to its immunity to high-intensity electromagnetic interference. Experimental results indicate that the undefined degree of the scale factor under lightning impulse for this measuring system is within ±1%, and therefore it can meet requirements specified by IEC60700-1.
Keywords :
HVDC power convertors; IEC standards; electromagnetic interference; lightning; optoelectronic devices; probes; pulse frequency modulation; thyristor convertors; voltage measurement; HVDC converter; IEC60700-1; PFM; electromagnetic interference; high-voltage resistive probe; impulse voltage measurement; lightning impulse; opto-electrical probe; optoelectronic system; pulse frequency modulation; scale factor; thyristor units; transmitting system; EMP radiation effects; Electromagnetic interference; Electromagnetic measurements; Frequency modulation; HVDC transmission; Probes; Pulse modulation; Thyristors; Valves; Voltage measurement;
Conference_Titel :
Applied Power Electronics Conference and Exposition, 2004. APEC '04. Nineteenth Annual IEEE
Print_ISBN :
0-7803-8269-2
DOI :
10.1109/APEC.2004.1296118
