Journal
IEEE TRANSACTIONS ON POWER ELECTRONICS
Volume 37, Issue 5, Pages 4962-4967Publisher
IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC
DOI: 10.1109/TPEL.2021.3132101
Keywords
Inverters; Indexes; Voltage; HVDC transmission; Analytical models; Power system dynamics; Power grids; Commutation failure (CF); commutation failure immunity index (CFII); hybrid multi-infeed HVdc (HMIDC) systems; hybrid multi-infeed interactive effective short-circuit ratio (HMIESCR); strength
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Funding
- National Natural Science Foundation of China [51907067]
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This letter develops a mathematical expression for the CF immunity index based on the quasi-steady-state model of HMIDC systems. The impact of strength on CF is analytically quantified in a more efficient and theoretically comprehensive manner compared to previous simulation-based methods. The theoretical developments are validated through experimental results on a hardware-in-the-loop platform.
The strength has a large impact on the commutation failure (CF) in hybrid multi-infeed HVdc (HMIDC) systems including both voltage-source converters and line-commutated converters. However, this impact has always been quantified by the simulation-based method in earlier works, which is very time-consuming and cannot lend the exhaustively theoretical perspective. Thus, in this letter, the mathematical expression of the CF immunity index as the analytical function of the hybrid multi-infeed interactive effective short-circuit ratio strength index is first developed based on the quasi-steady-state model of HMIDC systems. Thereafter, the developed expression is used for analytically quantifying the impact of the strength on the CF in a much more efficient manner with more sufficiently theoretical perspective compared to the simulation-based method in earlier works. Finally, the theoretical developments are validated by the experimental results of the hardware-in-the-loop platform based on a hybrid six-infeed HVdc test system.
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