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

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基于模糊自適應(yīng)PI的并網(wǎng)逆變器相位補(bǔ)償控制策略

來源:電工電氣發(fā)布時(shí)間:2023-12-28 13:28 瀏覽次數(shù):136

基于模糊自適應(yīng)PI的并網(wǎng)逆變器相位補(bǔ)償控制策略

張學(xué)毅,李福祥
(湖南工業(yè)大學(xué) 電氣與信息工程學(xué)院,湖南 株洲 412007)
 
    摘 要:為了解決 LCL 諧振和模糊自適應(yīng) PI 控制的穩(wěn)定裕度在高阻抗情況時(shí)無法滿足系統(tǒng)要求的問題,采用電容電流反饋有源阻尼,即在電容側(cè)并聯(lián)虛擬阻抗來抑制諧振尖峰,并在模糊自適應(yīng) PI 控制的基礎(chǔ)上,引入超前補(bǔ)償控制策略,提高逆變器在高網(wǎng)絡(luò)阻抗情況下輸出阻抗的相位裕度,保證模糊自適應(yīng) PI 控制的穩(wěn)定性。仿真結(jié)果表明:該方法提高了逆變器等效輸出阻抗的相位裕度,保證了系統(tǒng)在高網(wǎng)絡(luò)阻抗時(shí)也能夠穩(wěn)定運(yùn)行。
    關(guān)鍵詞: 弱電網(wǎng);模糊自適應(yīng)PI 控制;諧振;相位補(bǔ)償
    中圖分類號:TM464     文獻(xiàn)標(biāo)識碼:A     文章編號:1007-3175(2023)12-0023-06
 
Phase Compensation Control Strategy of Grid-Connected
Inverter Based on Fuzzy Adaptive PI
 
ZHANG Xue-yi, LI Fu-xiang
(College of Electrical and Information Engineering, Hunan University of Technology, Zhuzhou 412007, China)
 
    Abstract: In order to solve the problem that the stability margin of LCL resonance and fuzzy adaptive PI control cannot meet the system requirements in the case of high impedance, the capacitor current feedback active damping is adopted, that is, the virtual impedance is connected in parallel on the capacitor side to suppress the resonance spike, and on the basis of fuzzy adaptive PI control, the advanced compensation control strategy is introduced to improve the phase margin of the output impedance of the inverter under the condition of high network impedance, which ensure the stability of fuzzy adaptive PI control. The simulation results show that this method improves the phase margin of the equivalent output impedance of the inverter and ensures the stable operation of the system at high network impedance.
    Key words: weak grid; fuzzy adaptive PI control; resonance; phase compensation
 
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