DocumentCode :
3581070
Title :
Last breaker protection strategy based on arrester energy consumption characteristics in light loaded system
Author :
Ming Li ; Yan Li ; Chongli Tong ; Xiangning Lin ; Suyang Ding ; Jinwen Sun ; Fengwei Tian
Author_Institution :
Electr. Power Res. Inst. of China Southern Power, Guangzhou, China
fYear :
2014
Firstpage :
1
Lastpage :
4
Abstract :
Original last breaker protection based on arrester energy consumption characteristics might malfunction in light loaded power system. In this paper, we analyzes the relationship between the high side inlet voltage of converter transformer and the AC load, pointing out that the main reason of the arrester based last breaker protection maloperation is that the original protection strategy cannot distinguish light load state from isolation state of the AC line. This paper adds outlet head end voltage and output power to the original criterion, designs an improved one so that it can correctly distinguish what state the AC line and send the right signals for different action status. Simulate and analyze the act of original criterion and improved one in light loaded power system by using the simulation model which is built based on the actual operating parameters of Yunnan-Guangdong UHVDC project, validating the improvement of novel criterion.
Keywords :
HVDC power convertors; arresters; circuit breakers; energy consumption; power cables; transformer protection; AC line isolation state; AC load; Yunnan-Guangdong UHVDC project; arrester energy consumption characteristics; converter transformer high side inlet voltage; last breaker protection maloperation; light loaded power system; simulation model; Arresters; Circuit breakers; Energy consumption; HVDC transmission; Leakage currents; Voltage measurement; ac outlet status; arrester energy; last breaker; light load;
fLanguage :
English
Publisher :
ieee
Conference_Titel :
Power and Energy Engineering Conference (APPEEC), 2014 IEEE PES Asia-Pacific
Type :
conf
DOI :
10.1109/APPEEC.2014.7066086
Filename :
7066086
Link To Document :
بازگشت