Suzhou Electric Appliance Research Institute
期刊號: CN32-1800/TM| ISSN1007-3175

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基于LADRC與模糊自適應(yīng)的新型有源阻尼諧振抑制策略

來源:電工電氣發(fā)布時(shí)間:2023-03-04 11:04 瀏覽次數(shù):331

基于LADRC與模糊自適應(yīng)的新型有源阻尼諧振抑制策略

李月超,高志強(qiáng),周雪松,郭帥朝
(天津理工大學(xué) 電氣工程與自動(dòng)化學(xué)院,天津 300384)
 
    摘 要:針對 LCL 型并網(wǎng)逆變器固有諧振屬性容易引起系統(tǒng)諧振,影響系統(tǒng)穩(wěn)定性的問題,采用無需增添額外傳感器的并網(wǎng)電流反饋有源阻尼 (GCFAD) 法抑制諧振,并引入高通濾波器 (HPF) 抑制傳統(tǒng) GCFAD 中二次微分環(huán)節(jié)對高頻諧波電流的放大效應(yīng)。為應(yīng)對電網(wǎng)阻抗變化導(dǎo)致諧振頻率偏移時(shí)阻尼參數(shù)難以根據(jù)系統(tǒng)變化進(jìn)行實(shí)時(shí)調(diào)節(jié),提出一種基于線性自抗擾的新型并網(wǎng)電流反饋模糊自適應(yīng)有源阻尼控制策略 (FHPF-LADRC),進(jìn)一步提高系統(tǒng)的魯棒性。使用頻域分析法分析新型有源阻尼控制對抑制系統(tǒng)諧振峰值和高頻諧波衰減的效果,通過仿真結(jié)果驗(yàn)證了新型有源阻尼控制策略不僅有效提高系統(tǒng)阻尼效果,還增強(qiáng)系統(tǒng)穩(wěn)定性和諧波抑制力,具有較好的可行性。
    關(guān)鍵詞: 并網(wǎng)逆變器;諧振;有源阻尼;模糊自適應(yīng);自抗擾控制
    中圖分類號:TM464 ;TM712     文獻(xiàn)標(biāo)識碼:A     文章編號:1007-3175(2023)02-0015-08
 
New Active Damping Resonant Suppression Strategy Based on Linear Active
Disturbance Rejection and Fuzzy Adaptive
 
LI Yue-chao, GAO Zhi-qiang, ZHOU Xue-song, GUO Shuai-chao
(College of Electrical Engineering and Automation, Tianjin University of Technology, Tianjin 300384, China)
 
    Abstract: The inherent resonance of grid-connected inverter with LCL filter is apt to cause system resonance, affecting the system stability.In the paper, the grid-connected current feedback active damping (GCFAD) method without additional sensors is used to suppress resonance, and high pass filter (HPF) is introduced to suppress the amplification of high-frequency harmonic current by second derivative.It is difficult to adjust damping parameters in real time according to system changes when resonance frequency offsets due to grid impedance variation, so an active damping control strategy of new grid current feedback based on linear active disturbance rejection and fuzzy adaptive is proposed to further improve the robustness of the system. Effects of the new active damping control on resonant peak and high frequency harmonic attenuation are analyzed by frequency domain analysis method. The simulation results show that the new active damping control strategy has great feasibility because it not only effectively improves the damping effect of the system, but also enhances the system stability and harmonic suppression force.
    Key words: grid-connected inverter; resonance; active damping; fuzzy adaptive; auto disturbance rejection control
 
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