China Southern Power Grid Extra High Voltage Maintenance and Test Center

Guangzhou, China

China Southern Power Grid Extra High Voltage Maintenance and Test Center

Guangzhou, China

Time filter

Source Type

Xie H.,China Southern Power Grid Extra High Voltage Maintenance and Test Center | Lu Z.,China Southern Power Grid Extra High Voltage Maintenance and Test Center | Zhang N.,China Southern Power Grid Extra High Voltage Maintenance and Test Center | Peng G.,China Southern Power Grid Extra High Voltage Maintenance and Test Center | Chen X.,China Southern Power Grid Extra High Voltage Maintenance and Test Center
Gaodianya Jishu/High Voltage Engineering | Year: 2014

For further understanding the electrical characteristics of DC ice-melting device's zero power test (ZPT), we intensively researched the ZPT using EMTDC, including the mechanism of ZPT, the DC current/voltage and their harmonic characteristics, the AC harmonic characteristics, and the analysis of active power, reactive power, valve current/voltage, rising rates of on-state current and off-state voltage, and so on. The results show that, when the triggering angle decreases, the short-circuit DC current and the voltage drop in inverter increase, but the voltage at DC port decreases. The characteristic harmonics of DC current and DC voltage are 12 k1 (k1=1, 2, 3, ⋯) and 6 k2(k2=1, 3, 5, ⋯) harmonics, respectively. The DC components are small, and they decrease when the triggering angle increases, while the AC components increases. Moreover, DC ice-melting devise consumes small active power but big reactive power consumption, and the reactive power consumption proportionally increases with current. The obtained calculative results agree with field tests.

Loading China Southern Power Grid Extra High Voltage Maintenance and Test Center collaborators
Loading China Southern Power Grid Extra High Voltage Maintenance and Test Center collaborators