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- W3129270144 abstract "During the recovery of multi-infeed DC system after blackout, utilizing DC transmission system to provide power for the AC system can improve the load recovery efficiency, but the DC converter station is prone to commutation failure due to AC system faults. This paper focuses on the identification method of weak areas in multi-infeed DC receiving terminal system. Firstly, This paper derives the analytical equations about voltage sag and fault position for three-phase short-circuit faults based on the node impedance matrix. Then the paper derives the formula for calculating the critical voltage sag when the converter station operates normally. The relationship between the allowable voltage sag level of the converter station and the transmission power of the DC line is studied. Finally, an analytical algorithm for identification of weak areas in power grid considering transmission power is proposed. The concept is extended to the multi-infeed DC receiving terminal system, and the area of severity that causes simultaneous commutation failure is analyzed. The effectiveness and practicability of the proposed method are verified by the calculation results based on the multi-infeed DC system model of Shandong 500kv Grid." @default.
- W3129270144 created "2021-03-01" @default.
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- W3129270144 date "2020-12-04" @default.
- W3129270144 modified "2023-09-27" @default.
- W3129270144 title "Identification of the Weak Areas of Simultaneous Commutation Failure for Multi-infeed DC System during Power System Restoration" @default.
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- W3129270144 doi "https://doi.org/10.1109/scems48876.2020.9352395" @default.
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