高速低载频比传感信号下的逆变器有源阻尼自适应控制  

Active Damping Adaptive Control of Inverters with High Speed and Low Carrier Frequency Ratio Sensing Signals

作　　者：冯永芳[1] 白娜[2] FENG Yongfang;BAI Na(Department of Electronic Information,Jinzhong Vocational and Technical College,Jinzhong Shanxi 030600,China;Ocean Engineering College,Guilin University Of Electronic Technology,Guilin Guangxi 536000,China)

机构地区：[1]晋中职业技术学院电子信息系,山西晋中030600 [2]桂林电子科技大学海洋工程学院,广西桂林536000

出　　处：《传感技术学报》2024年第1期104-110,共7页Chinese Journal of Sensors and Actuators

基　　金：山西省高等学校科技创新项目(2021L598)。

摘　　要：逆变器工作在高频运行和控制载波比低的情况下,存在谐振尖峰抑制,提出了高速低载频比传感信号下的逆变器有源阻尼自适应控制技术。在高速低载频比传感信号下,构建逆变器数学模型。输出电流到电容电压与定子电流之间的传递函数,将逆变器的有源阻尼等效成一个控制电压环。调整有源阻尼自适应控制回路的参数,制定逆变器有源阻尼自适应控制策略。实验结果表明:文中技术的稳定裕度由2.46 dB下降至1.18 dB,可以保证逆变器的稳定运行;在不同采样频率下,可以控制逆变器输出与电网电压相同相位和频率的并网电流,其中在采样频率为5.9f时,输出并网电流和电压均表现为正弦状态,波动范围分别为[35 A,58 A]和[185 V,225 V],具有较好的控制效果。Under the condition of high frequency operation and low control carrier ratio,the inverter has resonance spike suppression.An active damping adaptive control technology for inverter under high speed and low carrier frequency ratio sensing signal is proposed.Under the condition of high speed and low carrier frequency ratio sensing signal,the mathematical model of inverter is built.The active damping of the inverter is equivalent to a control voltage loop by the transfer function from output current to capacitor voltage and stator current.The parameters of the active damping adaptive control loop are adjusted,and the active damping adaptive control strategy of the inverter is formulated.The experimental results show that the stability margin of the technology decreases from 2.46 dB to 1.18 dB,which can ensure the stable operation of the inverter;Under different sampling frequencies,the inverter can be controlled to output the grid connected cur-rent with the same phase and frequency as the grid voltage.When the sampling frequency is 5.9f,the output grid connected current and voltage are sinusoidal,and the fluctuation range is[35 A,58 A]and[185 V,225 V]respectively,with good control effect.

关 键 词：传感信号 高速低载频比 有源阻尼控制 数学模型 逆变器 

分 类 号：TM464[电气工程—电器]