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- W4364305268 abstract "In the DC transmission system with a high proportion of new energy, due to the large reactive power disturbance and the poor voltage regulation and support capability of new energy units, the problem of transient overvoltage at the terminals of new energy units is prominent during DC fault, which leads to the contradictory relationship between DC power and new energy power, which seriously affects the safe and stable operation of large-scale wind power UVDC transmission system and the consumption of new energy in the near area. In order to solve the above problems, a magnetic saturation controllable transformer (MSCT) is proposed. The DC power supply is used to control the saturation degree of the transformer core, so that it can have the reactive power compensation function similar to the magnetic control reactor on the basis of undertaking the collection and transmission of new energy power, and achieve the goal of restraining the overvoltage at the generator terminals of new energy units. Firstly, according to the characteristics of overvoltage at generator terminals of new energy units and the saturation characteristics of magnetic circuit of transformers, the feasibility and controllability of transformers as inductive reactive power sources are demonstrated, and a mathematical model of controllable reactance of transformers based on excitation current regulation is established; The transformer excitation control system is designed, including the detection part and the excitation current control link, so that the transformer can automatically control the saturation degree of the iron core according to the voltage level of the system, change the equivalent reactance of the transformer, change its reactive power, and realize the reactive power regulation and over-voltage suppression functions. Finally, the validity and superiority of the method are verified by the example of QingYu DC near area new energy in Qinghai power grid." @default.
- W4364305268 created "2023-04-12" @default.
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- W4364305268 date "2022-11-04" @default.
- W4364305268 modified "2023-09-24" @default.
- W4364305268 title "New Energy Transient Overvoltage Restraining Method based on Controllable Transformer" @default.
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- W4364305268 doi "https://doi.org/10.1145/3582935.3583103" @default.
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