风力发电系统中直流辅助电源的设计与仿真

为了满足风力发电系统中各监测单元模块对供电系统的需求,设计了一款多输出直流(direct current,DC)辅助开关电源.根据辅助电源参数的具体要求,理论分析并设计了DC-DC高频反激变压器;选用稳压管TL431、光电耦合器PC817以及UC2842控制芯片,实现对输出电压的采集、输入电流的采样以及功率MOS(me...

Design and Simulation of DC Auxiliary Power Supply in Wind Power Generation System

In order to meet the demand of each monitoring unit module in wind power generation system, a multi-output DC auxiliary switching power supply is designed. According to the specific requirements of relevant parameters of auxiliary power supply, the DC-DC high-frequency flyback transformer was theoretically analyzed and designed; The voltage regulator TL431, optoelectronic coupler PC817 and UC2842 control chip were selected to realize the collection of output voltage, input current and drive of power MOS tube; A flyback switching power supply circuit with multiple output and double closed-loop control with output voltage of 5 V, 15 V and 24 V was built, and the circuit simulation of the designed DC auxiliary switching power supply was carried out by using Saber software. The simulation results show that the output voltage,duty cycle and switching frequency of the designed multi-output DC auxiliary switching power supply meet the design requirements, and their values are all within 10% of the design accuracy requirements. It is concluded that the method adopted in the design of auxiliary power circuit in this paper is simple and effective, and the selection of the parameter valuesSof each component of the circuit is reasonable, which can provide a reference for the optimization of parameters of each component in the subsequent hardware development of the circuit of the DC auxiliary power system.