变频电网有源电力滤波器的无源控制策略  

Passivity control strategies of active power filters in variable-frequency power system

作　　者：高峰[1] 林辉[2] 

机构地区：[1]西安建筑科技大学机电工程学院,陕西西安710055 [2]西北工业大学自动化学院,陕西西安710129

出　　处：《电机与控制学报》2016年第11期61-69,共9页Electric Machines and Control

基　　金：陕西省教育厅专项科研计划项目(16JK1451);西安建筑科技大学基础研究基金(JC1512);西安建筑科技大学人才科技基金(RC1424)

摘　　要：为了提高变频交流电网的电能质量,针对变频电网有源电力滤波器的复杂工作环境,提出一种基于无源控制理论的具有频率和不确定参数自适应性,带有L2增益的控制策略。该方法首先在考虑了不确定参数、外界干扰和电网频率变化等因素的情况下,建立了非自治有源电力滤波器系统的EL平均化模型。在此基础上,设计了包含不确定参数自适应控制律、L2增益控制律及频率自适应指令电流产生方法的自适应鲁棒控制器,并证明了整个非自治误差伴随系统的稳定性。将提出的方法在变频电网有源电力滤波器系统中进行了仿真验证,并与两种同类典型方法作了比较。理论分析和仿真对比结果表明所提方法在变频电网复杂工况下,能确保并联有源电力滤波器系统的跟踪和补偿效果,而且具有鲁棒性强、频率自适应等优势,具有一定实用价值。To improve power quality of variable-frequency power system and adapt to the complex working environment of active power filters（APF） , a novel control strategy based on passivity theory with L2 gain and the adaptabilities for frequency and uncertain parameters was proposed. A non-autonomous Euler-La- grange （EL） averaged model of APF considering uncertain parameters, outside interferences and varying frequency was built. Then an adaptive robust controller which consists of adaptive control law for uncertain parameters ,L2 gain control law for outside interferences and adaptive reference current generating method for grid frequency was designed and the stability of the non-autonomous error adjoint system was proved. The simulation results from proposed controller and another two controllers were compared. Theory analy- sis and simulation comparisons were presented to verify the validity and superiority in robustness and fre- quency adaptability of the proposed controller in variable-frequency power system.

关 键 词：变频电网 有源电力滤波器 无源性 自适应控制 鲁棒性 

分 类 号：TM71[电气工程—电力系统及自动化]