无传感器下中频逆变电源死区补偿与控制策略  

Deadtime compensation and control strategy for middle frequency inverter power supply without current sensor

作　　者：贺玫璐 薛鹏飞 刘平[3] 刘永杰 苗轶如 HE Meilu;XUE Pengfei;LIU Ping;LIU Yongjie;MIAO Yiru(School of Electronic Information Engineering,Taiyuan University of Science and Technology,Taiyuan 030024,China;Taiyuan Power Supply Company,State Grid Taiyuan Electric Power Co.,Ltd.,Taiyuan 030012,China;College of Electrical and Information Engineering,Hunan University,Changsha 410082,China)

机构地区：[1]太原科技大学电子信息工程学院,山西太原030024 [2]国网山西省电力公司太原供电公司,山西太原030012 [3]湖南大学电气与信息工程学院,湖南长沙410082

出　　处：《电机与控制学报》2023年第10期171-180,共10页Electric Machines and Control

基　　金：汽车零部件先进制造技术教育部重点实验室开放项目(2021KLMT02)。

摘　　要：在飞机停靠阶段采用400 Hz地面电源代替飞机辅助动力源是降低机场碳排放量的重要手段。然而,受限于开关频率与电压高动态响应速度的要求,400 Hz逆变电源通常采用输出电压单闭环控制策略,减少了LC滤波器中电感电流的采样与控制环节,导致控制系统设计难度加大,同时因无法获得电流极性而缺少了死区补偿方向。为了提高400 Hz逆变电源负载电压的控制性能与电能质量,首先针对400 Hz逆变电源中因死区对逆变器输出电压基波幅值、相位误差以及低次谐波畸变的影响机理进行分析,进而提出一种基于电流观测的死区补偿策略。根据电感电流的状态方程,提出构建无零漂的电流观测模型,得到电感电流的极性,对调制电压信号进行补偿,实现对死区效应的抑制。然后建立系统的传递函数,结合幅频特性曲线,从抗扰动性、高频衰减特性以及动态响应速度几个方面总结出比例-谐振控制器的参数优化设计方法。最后搭建仿真模型与实验平台,对所提电流观测模型、死区补偿方法以及控制器参数优化设计方法的可行性与有效性进行验证。Instead of the auxiliary power system,a 400 Hz ground power unit is applied to airplanes during stopovers in airports,which is an important means of reducing carbon emissions of airport.However,under the restraint of switching frequency and high dynamic response speed,a single control loop is usually implemented in 400 Hz voltage-source inverter,and the sampling and control of the inductor current in the LC filter are avoided,which will make the design of the control system more difficult,and the direction of the dead-time compensation can not be obtained due to the lack of the current polarity.In view of the above problems,this paper analyzes the influence on the output voltage of inverter due to the deadtime,including the errors of fundamental amplitude and phase,and the low-order harmonic distortion,and a dead-time compensation strategy based on current observation is proposed.According to the state equation of the inductor current,a current observation model without zero drift was proposed to obtain the polarity of the inductor current and the modulation voltage signal was compensated to suppress the deadtime effect.Then,combined with the amplitude-frequency characteristic curve,the parameter optimization design method of the single closed-loop proportional-resonant controller was studied.Finally,a simulation model and an experimental platform were established to verify the feasibility and effectiveness of the current observation model,dead-time compensation method and controller parameter optimization design method proposed in this paper.

关 键 词：航空地面电源 逆变器 电流观测 死区补偿 比例谐振控制器 谐波畸变 

分 类 号：TM301.2[电气工程—电机]