基于Park变换的LC型逆变器参数在线辨识策略  

Online Parameter Identification Strategy of LC Inverter Based on Park Transformation

作　　者：李双 施建强 LI Shuang;SHI Jian-qiang(School of Energy and Power Engineering,Nanjing Institute of Technology,Nanjing 211167,China)

机构地区：[1]南京工程学院能源与动力工程学院,江苏南京211167

出　　处：《控制工程》2023年第5期865-871,共7页Control Engineering of China

基　　金：国家自然科学青年基金资助项目(51906098)。

摘　　要：针对采用电压电流双闭环控制的LC型逆变器,提出了一种滤波电感和电容参数的在线辨识策略。对电压、电流信号进行Park变换和积分滤波,得到电压、电流的基波dq轴分量后代入推导的表达式进行计算,即可辨识出电感、电容参数;利用开环运行时的调制波信号间接获取参数辨识所需的逆变器输出电压,从而节省了传感器;搭建了MATLAB/Simulink仿真模型,仿真结果表明,所提策略在逆变器不同负载强度下以及电感、电容参数偏移时均能准确识别参数,且不会影响系统的稳态运行。Aiming at the LC inverter with double closed-loop control of voltage and current,an online identification strategy of filter inductance and capacitance parameters is proposed.Firstly,Park transformation and integral filtering on voltage and current signals are performed to obtain the fundamental d and q axis components of voltage and current and is substituted them into the derived expression calculations to identify the inductance and capacitance parameters.Secondly,the modulated wave signal in open-loop operation is used to indirectly obtain the inverter output voltage required for parameter identification,thereby saving sensors.Finally,a model based on MATLAB/Simulink is built.The simulation results show that the proposed strategy can accurately identify the parameters under different load intensities of the inverter and when the inductance and capacitance parameters are offset,and will not affect the steady-state operation of the system.

关 键 词：LC型逆变器 PARK变换 参数辨识 双闭环控制 

分 类 号：TM464[电气工程—电器]