有源电力滤波器补偿的PI解耦控制技术研究  

Research on PI Decoupling Control Technique for Active Power Filter Compensation

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,新疆乌鲁木齐830013

出　　处：《自动化仪表》2024年第4期51-56,共6页Process Automation Instrumentation

摘　　要：电网中电压和电流波形的失真会产生谐波,导致电网功率因数降低,并影响电力系统的稳定性和可靠性。为了确保电力系统的正常工作,研究了基于有源电力滤波器补偿的比例积分(PI)解耦控制技术。设计了基于二极管钳位式的有源电力滤波器模型。结合基尔霍博电压法,降低控制谐波和解除部分变量耦合。针对设备非线性产生的谐波,分析有源电力滤波器的可逆性,获得输入雅可比矩阵,以实现滤波器旋转坐标的线性化。利用变换矩阵转换转动角速向量,输入谐波的幅度,输出电流取样延迟,完成无差PI解耦控制。试验结果表明,所提技术能够有效解耦滤波器的谐波电流成分,从而补偿电网中的失真电流。该技术可以减少谐波对电力系统的整体影响,保证设备的正常运行。Distortion of voltage and current waveforms in the power grid generates harmonics,which leads to a reduction in the power factor of the power grid and affects the stability and reliability of the power system.To ensure the normal operation of the power system,the proportional integral(PI) decoupling control technique based on active power filter compensation is investigated.A diode-clamped based active power filter model is designed.The Kirchhoffer voltage method is combined to reduce control harmonics and decouple some variables.For the harmonics generated by equipment nonlinearity,the reversibility of the active power filter is analyzed to obtain the input Jacobi matrix to linearize the filter rotation coordinates.The transformation matrix is utilized to convert the rotation angle velocity vector,the amplitude of the input harmonics,and the output current sampling delay to complete the non-differential PI decoupling control.The experimental results show that the proposed technique can effectively decouple the harmonic currents of the filter,compensate for the distortion currents in the power grid.The technique can reduce the overall impact of harmonics on the power system,and ensure the normal operation of the equipment.

关 键 词：有源电力滤波器 谐波补偿 比例积分解耦控制 雅可比矩阵 电流互感器 开环传递函数 基尔霍博电压法 

分 类 号：TH-39[机械工程]