Journal
CSEE JOURNAL OF POWER AND ENERGY SYSTEMS
Volume 1, Issue 4, Pages -Publisher
CHINA ELECTRIC POWER RESEARCH INST
DOI: 10.17775/CSEEJPES.2015.00051
Keywords
High-voltage direct current (HVDC) asynchronous interconnected system; instability mechanism; multiple HVDC commutation failure; sending-side system stability
Funding
- Technology Projects of State Grid Corporation of China [XT71-15-050]
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As high-voltage direct current (HVDC) lines with large capacity are being commissioned with higher frequency, the characteristics of strong DC and weak AC transmission in the power grid are topics of interest. In particular, the coupling and interaction between the sending-side and receiving-side AC systems interconnected by large-scale DC links is gaining importance. In this paper, the impact of the multiple HVDC commutation failure on the stability of the sending system under different power flow directions is analyzed based on the three-area AC/DC equivalent model. The main influencing factors and the counter-measures are discussed, and the single HVDC line blocking is taken as a comparison. Finally, the results are verified using the North China-Central China-East China power grid case system. The study provides a basis and reference to ensure security and stability of the ultra-high-voltage (UHV) AC/DC hybrid power grid.
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