基于二阶积分超前补偿器的设计  

Design of Advanced Compensator Based on Second-order Integration

作　　者：吴世均 WU Shi-jun(State Key Laboratory of Intelligent Coal Mining and Strata Control(China Coal Research Institute),Shanghai 200030,China)

机构地区：[1]煤炭智能开采与岩层控制全国重点实验室,上海200030 [2]天地上海采掘装备科技有限公司,上海201400 [3]中煤科工集团上海有限公司,上海200023

出　　处：《电力电子技术》2024年第11期41-43,共3页Power Electronics

基　　金：天地科技有限公司科创创业专项基金(2023-TD-MS003)。

摘　　要：在电力电子控制系统中,电流属于瞬变快速检测量,需要准确、快速地检测出每个采样点的幅值与相位。然而硬件电路滤波环节会使信号的幅值与相位产生误差,这样会影响锁相精度,使电流环控制不稳定。针对该问题,此处提出基于二阶积分的超前补偿算法,根据采样电流值来补偿硬件电路带来的幅值衰减与相位滞后,还原真实的电流信息。仿真结果证明在上限截止频率附近的一定频率段内,可以有效减小硬件电路带来的误差。最后将传递函数离散处理,计算出各项参数的权重值,得到可以在程序中实际使用的补偿算法,并在脉宽调制(PWM)整流程序中验证了该算法的正确性。In the power electronic control system,the current is a transient fast detection quantity,which needs to detect the amplitude and phase of each sampling point accurately and quickly.However,the filter of hardware circuit will make the amplitude and phase error of the signal,which will affect the accuracy of phase lock and make the current loop control unstable.In order to solve this problem,a lead compensation algorithm based on second-order integration is proposed,which compensates the amplitude attenuation and phase lag caused by the hardware circuit according to the sampled current value,and restores the real current information.Simulation results show that the error caused by hardware circuit can be effectively reduced in a certain frequency range near the upper cut-off frequency.Finally,the transfer function is discretized,the weight values of each parameter are calculated,and the compensation algorithm which can be used in the program is obtained.The correctness of the algorithm is verified in the pulse width modulation(PWM)rectifier program.

关 键 词：补偿器 二阶积分 传递函数 

分 类 号：TN715[电子电信—电路与系统]