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Применить Всего найдено 2. Отображено 2.
13-06-2023 дата публикации

Direct-current bus variable-structure doubly-fed strong excitation converter

Номер: CN116260179A
Автор: XU JUNTAO, ZHAO RENDE, XUAN CONGCONG, LIU YUANBING, ZHANG CHENGYI, SU HENG, HOU ZHEN, YIN XIAO, HE JINKUI, YAN QINGZENG, HU HUIHUI, HAN CHANGZHONG
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The invention discloses a direct current bus variable structure double-fed strong excitation converter which is composed of a network side two-level converter, four sets of DAB converters, two sets of series-parallel switching circuits and a rotor side NPC type three-level inverter, and the four sets of DAB converters and the two sets of series-parallel switching circuits jointly input direct current voltage to form two sets of output voltage capable of being switched in a series-parallel mode. The rotor side NPC type three-level inverter is connected to a positive direct current bus and a negative direct current bus of the NPC type three-level inverter, and the rotor side NPC type three-level inverter carries out closed-loop control on the rotor current of the DFIG. According to the forced excitation converter, a variable-structure direct-current bus is constructed by using a dual-active bridge converter and a series-parallel switching circuit, so that the voltage of the rotor-side direct-current ...

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Номер записи: 1
23-05-2023 дата публикации

Control method of DAB-based H-bridge series-parallel switching type strong excitation converter

Номер: CN116154845A
Автор: XU JUNTAO, ZHAO RENDE, MENG CHAO, LIU YUANBING, ZHANG CHENGYI, SU HENG, HOU ZHEN, YIN XIAO, HE JINKUI, YAN QINGZENG, HU HUIHUI, HAN CHANGZHONG
Принадлежит:

The invention provides a control method for an H-bridge series-parallel switching type strong excitation converter based on a DAB, and the structure of a grid-side converter is the same as that of a conventional two-level voltage source inverter, and the grid-side converter is directly connected with a power grid through an inductor. The rotor side converter is composed of a DAB, an H-bridge module and a switching circuit. According to the technical scheme, in order to solve the problem that induced electromotive force generated by a rotor side during low voltage ride-through of a DFIG is too large, the DAB-based H-bridge series-parallel switching type doubly-fed forced excitation converter is provided according to the idea of constructing the forced excitation converter in order to ensure that the DFIG is always controllable when a power grid breaks down; a DAB + H bridge series-parallel topology is used for replacing a traditional rotor side converter. When the voltage of the power grid ...

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Номер записи: 2