Influences of ±800 kV Yunnan-Guangdong HVDC System on Security and Stability of China Southern Power Grid
Energy and Power Engineering(2013)
Abstract
The interaction mechanism between AC and DC systems in a hybrid AC-DC transmission grid is discussed with PSS/E software.Analysis shows that receiving-end AC faults may cause much more damage on the HVDC system operation than the sending-end AC faults in a multi-infeed HVDC system, and the damage severity depends on the power recovering rate of the HVDC systems.For HVDC systems with slow power recovering rate, the receiving-end AC faults may probably be a critical factor to constrain power transfer limits.Larger capacity of HVDC system means not only higher power transfer-limit of the parallel connected AC-DC transmission grid, but also more expensive stabilizing cost.
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Key words
security,stability,power system,interaction
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