灵活裕度约束下的电力滤波器定频滞环电流控制系统  

Power Filter Constant Frequency Hysteresis Current Control System with Flexible Margin Constraints

作　　者：孙文革[1] SUN Wenge(School of Mechanical and Electronic Engineering,Xinjiang Vocational University,Urumqi 830013,China)

机构地区：[1]新疆职业大学机械电子工程学院,乌鲁木齐830013

出　　处：《自动化与仪器仪表》2024年第8期270-273,278,共5页Automation & Instrumentation

基　　金：2020年新疆维吾尔自治区自然科学基金项目(2020C01C011)。

摘　　要：电力滤波器定频滞环电流控制时,受开关频率影响降低了滤波器谐波滤除效果,为此,在灵活裕度约束下设计电力滤波器定频滞环电流控制系统。该方法首先根据构建的控制系统框架,详细完成框架内各个硬件模块的功能设计;再针对系统中的主、从DSP模块,获取滤波器定频滞环电流控制原理,制定电力滤波器定频滞环电流控制策略;最后建立以灵活裕度为约束的系统控制约束条件,通过约束条件获取结果选取与误差电流相适应的内外环控制策略,从而实现电力滤波器定频滞环的电流控制。实验结果表明,利用该方法开展电力滤波器定频滞环电流控制时,谐波幅值在10~(-2)A以下;滤波器开关频率最高为72/次;输出电流的控制效果与参考电流的拟合度较高,表明该方法的控制效果好。When controlling the fixed frequency hysteresis current of power filters,the harmonic filtering effect of the filter is reduced due to the influence of switching frequency.Therefore,a fixed frequency hysteresis current control system of power filters is designed under flexible margin constraints.This method first completes the detailed functional design of each hardware module within the framework based on the constructed control system framework;Then,based on the master and slave DSP modules in the system,obtain the principle of filter fixed frequency hysteresis current control and develop a power filter fixed frequency hysteresis current control strategy;Finally,a system control constraint condition is established with flexibility margin as the constraint,and the results are obtained through the constraint conditions to select an internal and external loop control strategy that is suitable for the error current,thereby achieving current control of the fixed frequency hysteresis loop of the power filter.The experimental results indicate that when using this method to implement frequency-locked loop current control for power filters,the harmonic amplitude is below 10-2 A.The maximum switch frequency of the filter is 72 times per second.The control effect of the output current shows a high degree of fitting with the reference current,indicating that this method has a good control effect.

关 键 词：灵活裕度 电力滤波器 定频滞环电流 控制策略 开关频率 

分 类 号：TM761[电气工程—电力系统及自动化] TP273[自动化与计算机技术—检测技术与自动化装置]