摘要
对于复杂多工况切换的脉冲负载问题,传统不控或PID全控整流变换系统均无法解决输出电压响应和交流侧电流谐波间的技术指标矛盾,为此提出一种根据工况变化自适应调节的控制方法。首先分析脉冲负载多工况切换条件下电压稳定速度和三相电流谐波与控制器参数的关系,得到两技术指标间矛盾机理。基于三相PWM整流器的数学模型构建线性自抗扰控制器,确定其基本参数。根据LADRC等效截止频率和交流侧电流谐波与控制器参数的关系,设计等效带宽参数的4自由度更新算法,根据工况变化实现自适应参数调节。仿真和实验结果表明,提出的自适应线性自抗扰控制器能够提高脉冲负载整流器在负载工况切换时的电压动态响应速度,同时降低稳定工况下的交流侧三相电流谐波,实现两指标间的自适应协调。
For the pulse load with complex multi-conditions switching, the traditional uncontrolled or PID full controlled rectifier transformation system can not solve the technical index contradiction between the output voltage response and the AC side current harmonic. Therefore, a control method of adaptive adjustment according to the change of working conditions was proposed. Relationship between the voltage stability speed, three-phase current harmonic and the controller parameters under multi-conditions switching of pulse load was analyzed, and the contradiction mechanism between the two technical indicators was obtained. Based on the mathematical model of three-phase PWM rectifier, a linear active disturbance rejection controller was constructed and its basic parameters were determined. According to the relationship of the equivalent cut-off frequency of linear active disturbance rejection control(LADRC) and the AC side current harmonics with the controller parameters, a 4-degree of freedom updating algorithm for the equivalent bandwidth parameters was designed to adjust it adaptively by the change of conditions. Simulation and experimental results show that the proposed adaptive LADRC can improve the voltage dynamic response speed of the pulse load rectifier while load conditions switching and reduce the three-phase current harmonics of the AC side under stable conditions, so as to achieve adaptive coordination between the two indicators.
作者
高崇禧
颜景斌
李学东
沈云森
袁银
GAO Chong-xi;YAN Jing-bin;LI Xue-dong;SHEN Yun-sen;YUAN Yin(School of Electric and Electronic Engineering,Harbin University of Science and Technology,Harbin 150080,China)
出处
《电机与控制学报》
EI
CSCD
北大核心
2023年第1期55-64,共10页
Electric Machines and Control
基金
国网黑龙江公司科技项目(52243718000T)。
关键词
脉冲负载
线性自抗扰控制
自适应控制
谐波抑制
动态响应
工况切换
pulse load
linear active disturbance rejection control
adaptive control
harmonic suppression
dynamic response
working condition switching
