基于基准频率自适应谐波准谐振控制器的宽变频逆变电源控制研究  

Research on Control of Wideband Variable-Frequency Inverters Based on Harmonics Quasi Resonant Controller with Frequency Reference Adapting

作　　者：刘海春[1] 过仕安 钱强 谢少军[1] Liu Haichun;Guo Shian;Qian Qiang;Xie Shaojun(College of Automation Engineering,Nanjing University of Aeronauticsand Astronautics,Nanjing 211106,China;College of Energy and Power,Hohai University,Nanjing 211100,China)

机构地区：[1]南京航空航天大学自动化学院,南京211106 [2]河海大学能源与动力学院,南京211100

出　　处：《电工技术学报》2024年第20期6462-6474,共13页Transactions of China Electrotechnical Society

基　　金：国家自然科学基金资助项目(52277183)。

摘　　要：360~800 Hz宽变频交流电源系统是多电飞机电力系统的主要发展方向之一。为实现宽变频中频逆变电源在包括带整流型非线性负载等工况下的宽范围谐波抑制,保证其任意基准频率下的输出电压质量,提出一种基于频率基准自适应谐波准谐振控制器的控制策略。基于滤波电感电流反馈,设计了包含数字控制延迟补偿的有源阻尼方案,以抑制输出滤波器的谐振尖峰,对电压控制器的被控对象进行校正使系统得到简化;设计并采用积分与准比例谐振相结合的基波追踪控制器以消除基波频段的稳态误差;提出基准频率自适应的补偿角度设计方法以实现谐波准谐振控制在电压环控制带宽之外的谐波抑制。在理论分析的基础上,搭建了一台300~800 Hz/600 W单相逆变器样机并进行实验测试,结果表明,采用该控制策略的逆变器能够实现宽基波频段内任意基准频率下的宽范围谐波抑制,且具有良好的稳态和动态输出特性。With the development of more electric aircraft(MEA)and the increase of aircraft power system capability,AC power system of 360~800 Hz wide variable frequency has become one of the most important development trends due to its high reliability,high power density,and huge individual machine capability.However,since more and more electric and electronic equipment,especially nonlinear loads such as rectifiers,are applied in aircraft,the harmonics induced by those loads significantly impact the voltage quality of the aircraft grid.Unlike a 50 Hz inverter,the harmonic frequency of a medium-frequency inverter is very high,usually beyond the control band,which leads to a relatively small phase margin and great difficulty in control.Typical methods,such as repetitive control,do not satisfy the requirement when the power source frequency varies.QPR(quasi-proportional resonant)and HQR(harmonics quasi-resonant)control performs poor stability since its phase changes suddenly at the resonant frequency.The paper focuses on harmonics suppression for 360~800 Hz wide variable frequency AC power inverter,as well as the stability of the voltage controller.First,the structure of a single-phase inverter with digital control is described,and then the delay of digital control,which greatly influences control stability,is derived.Next,the stability of the control system with the application of HQR is discussed.The system phase margin is very small,even negative.Due to large frequency variation,a constant angle compensation cannot ensure the control system’s stability.To simplify the design of the voltage controller,inductor current feedback active damping with digital control delay compensation is designed,which provides a suitable stability margin and minimum phase characteristic for the controlled object and suppresses the resonance peak.Furthermore,the I(integration)+QPR control scheme is proposed to improve the tracking ability of fundamental voltage.As the frequency varies from 360 Hz to 800 Hz,for HQR,a constant angle compensation

关 键 词：变频逆变电源 谐波抑制 准谐振控制 相位补偿 自适应控制 

分 类 号：TM46[电气工程—电器]