Zhejiang University

Shanghai Institute of Pharmaceutical Industry

Zhejiang Medicine Co., Ltd. Xinchang Pharmaceutical Factory

Wu, Zhanggui

Shanghai Health Creation Center Ltd. for Biopharmaceuticals R & D

Wei Wei

Weicheng Zhou

Yonggang Peng

Zhanggui Wu

Miao Yu

Lingxia Lu

Dingfeng Zhang

Jianing Liu

Yuanyuan Ge

Zhenren Liu

Xiaoming Wang

Lingao Ruan

Chang Shao

Mei Ge

Shunli Zhang

Provided is a method for analyzing the stability of a PMSG-WT connected to a weak power grid considering the influence of power control. New energy power generation mostly uses a perturbation and observation (P&O) method for maximum power point tracking, and nonlinear discontinuous links therein make stability analysis difficult. The present application analyzes the stability of the PMSG-WT connected to the weak grid system based on a describing function method, and fully considers the nonlinear discontinuous links in the power loop, thus making the analysis result more accurate. At the same time, the describing function method is a method that can quantitatively calculate the frequency and amplitude of oscillation. The analysis method of the present application can provide a powerful and good reference for oscillation suppression and controller design.

Method for analyzing stability of permanent magnet synchronous generator-based wind turbines connected to weak power grid considering influence of power control

The disclosure relates to power electronics technology and aims to provide a control method of constant-voltage-gain isolation type bidirectional full-bridge DC/DC converter, which is based on a single-phase-shifting modulation method. By enabling the difference between the M times of the input voltage and primary-referred value of the output voltage to be constantly zero, to realize the control goal that the ratio value between the primary-referred value of the output voltage and the input voltage is constantly M; the ratio value between the primary-referred value of the output voltage and the input voltage is defined as the voltage gain M, wherein an adjusting range is 0.5&#x2dc;2; through introducing a feedforward compensator involving the input and output voltages and the input and output currents, a linear controller of the system is implemented.

Control method of constant-voltage-gain isolation type bidirectional full-bridge DC/DC converter

Growing community of inventors

Zhejiang, China

Wei Wei