Huazhong University of Science and Technology

Xudong Zou

Yong Kang

Jiabing Hu

Shuang Liu

Donghai Zhu

Yini Zhou

Changle Xu

Qingbo Tang

Weibin Jiang

Wenchao Jiang

The disclosure discloses a phase-locked loop optimization method and device for ultra-fast frequency support for power electronic converters, and belongs to the technical field of new energy power generation control. The disclosure adds a phase step link to the traditional phase-locked loop structure. When it is detected that the system frequency index exceeds the limit, a phase angle difference is instantly added to the phase-locked loop output angle, this enables the power electronic converter to quickly output power after the frequency drops, effectively improving the system frequency change rate and the frequency nadir. At the same time, the original phase-locked loop control structure is retained, which does not affect the design of the original phase-locked loop controller parameters and does not sacrifice the original dynamic performance of the phase-locked loop.

Ultra-fast frequency support for power electronic converters

A DC-DC converter includes an inductor, a rectifier module, a first bridge arm topology and a second bridge arm topology and a third bridge arm topology in parallel as well as a capacitor, wherein the first bridge arm topology includes a first switching tube and a fourth switching tube in series, the second bridge arm topology includes a second switching tube and a fifth switching tube in series, and the third bridge arm topology includes a third switching tube and a sixth switching tube in series; the inductor has one end connected to a coupling point formed by connecting the first switching tube and the fourth switching tube in series, and the other end connected to a coupling point formed by connecting the second switching tube and the fifth switching tube in series.

DC-DC converter for wide input voltage

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Hubei, China

Xudong Zou