基于线性自抗扰的无刷双馈电机功率解耦控制策略研究  

Linear Active Disturbance Rejection Power Decoupling Control Method for BDFM

作　　者：王旭明 罗成[1] 熊志 杨凯[1] 徐智杰 李银斌[3] WANG Xuming;LUO Cheng;XIONG Zhi;YANG Kai;XU Zhijie;LI Yinbin(School of Electrical and Electronic Engineering,Huazhong University of Science and Technology,Wuhan 430074,Hubei,China;Economic&Technical Research Institute,State Grid Hubei Electric Power Co.,Ltd.,Wuhan 430077,Hubei,China;China Yangtze Power Co.,Ltd.,Yichang 443002,Hubei,China)

机构地区：[1]华中科技大学电气与电子工程学院,湖北武汉430074 [2]国网湖北省电力有限公司经济技术研究院,湖北武汉430077 [3]中国长江电力股份有限公司,湖北宜昌443002

出　　处：《电气传动》2024年第8期27-35,共9页Electric Drive

基　　金：国家自然科学基金(52237002);湖北省重点研发计划项目(2022BAA097)。

摘　　要：针对抽水蓄能机组工作环境复杂、温度等扰动较为突出、传统矢量控制对于无刷双馈电机控制精度不足的问题,研究了一种基于线性自抗扰控制的无刷双馈电机功率解耦控制策略,用来降低电机扰动并提高控制精度,提升其运行特性,进而提高其在抽水蓄能系统中的能量转换效率。建立了无刷双馈电机统一坐标系下两相旋转坐标系的数学模型,采用功率绕组定向的方法确定坐标系,推导了功率绕组定向下的电流关系并据此使用控制绕组控制功率绕组的有功和无功,从而实现了功率解耦控制。为提高控制性能,重写转速环和电流环,分析扰动,列写状态方程,设计扩张状态观测器,采用自抗扰技术提升了电机控制性能。进行谐波分析,基于控制绕组电流在同步坐标系下主要谐波为6次谐波的结论,采用重复控制器进行特定频次谐波的抑制。通过Simulink仿真,观察动态响应和d轴绕组电流傅里叶分析,并在电网电压阶跃变化和系统存在白噪声两种状态下与传统PI控制的效果进行对比,验证了所提自抗扰功率解耦控制方法及谐波抑制方法的有效性。In response to the complex working environment of pumped storage energy units,where disturbances such as temperature variations are prominent,and considering the insufficient control precision of traditional vector control for brushless doubly-fed machine(BDFM),a study was conducted on a control strategy based on linear active disturbance rejection control(ADRC)for power decoupling of BDFM.This strategy aims to mitigate disturbances,enhance control precision,improve operational characteristics,and consequently elevate the energy conversion efficiency within pumped storage energy systems.The mathematical model for BDFM in the unified coordinate system and two-phase rotating coordinate system was established.The coordinate system was determined using the power winding orientation method.The current relationship under the power winding orientation was derived,and based on this,the control winding was used to control the active and reactive power of the power winding,thereby achieving power decoupling control.To improve control performance,the speed loop and current loop were rewritten,disturbances were analyzed,state equations were formulated,an extended state observer was designed,and the control performance of the machine was enhanced using the active disturbance rejection control technique.Based on the analysis of harmonics,it is concluded that the main harmonic in the synchronous coordinate system is the 6th harmonic.To suppress specific frequency harmonics,the repetitive controller was employed.Through Simulink simulation,dynamic responses and Fourier analysis of the d-axis winding current were observed,confirming the effectiveness of the proposed active disturbance rejection power decoupling control method and harmonic suppression method.

关 键 词：无刷双馈电机 功率解耦 自抗扰控制 重复控制器 谐波抑制 

分 类 号：TM346[电气工程—电机]