期刊
IEEE TRANSACTIONS ON POWER DELIVERY
卷 30, 期 3, 页码 1585-1593出版社
IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC
DOI: 10.1109/TPWRD.2015.2411997
关键词
Commutation failure; improved current order limiter; LCC-HVDC; power component detect
资金
- National High Technology Research and Development Program of China (863 Program) [2013AA050105]
- National Science Foundation of China [51177042]
- Specialized Research Fund for the Doctoral Program of Higher Education [20130036120006]
- Major Projects on Planning and Operation Control of Large Scale Grid of State Grid Corporation of China [SGCC-MPLG004-2012]
A power component detection (PCD) method and an improved current order limiter control (improved COL) are proposed to mitigate the commutation failure in a line-commutated converter-based high-voltage direct current (LCC-HVDC). Integrating the instantaneous voltage and instantaneous current characteristics under single-phase and three-phase-to-ground faults, a fault detection method based on the power component is proposed, and the corresponding setting principle is presented. Then, an improved dc current order limiter is introduced. To evaluate the effectiveness of the proposed methods, a dual-infeed HVDC system is developed in PSCAD/EMTDC, and the presented methods are also implemented. The transient performances of dual-infeed HVDC, under single-phase and three-phase-to-ground faults at the inverter ac busbar of one LCC-HVDC link, are investigated. Simulation results show that the PCD method, with the voltage and current components as an additional judgment criterion, is more sensitive to detect the single-phase and three phase faults, and even more reliable than the detect method taking only voltage or current components for faults recognition. It can also be concluded that the improved COL that is integrated with the advancing firing angle control has the ability to make the LCC-HVDC less susceptible to commutation failure. Finally, the improvement of commutation process by improved COL is further demonstrated.
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