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

    

      
    
        
    
            
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    基于阻抗重塑分析的逆變器并網(wǎng)穩(wěn)定性研究
    
            
    來(lái)源：電工電氣發(fā)布時(shí)間：2023-07-27 13:27 瀏覽次數(shù)：317
    
            
    
              
    
	基于阻抗重塑分析的逆變器并網(wǎng)穩(wěn)定性研究
    

    
	楊茹楠，劉明陽(yáng)，李德強(qiáng)，徐奕翔，蘇旭
    

    
	(國(guó)網(wǎng)天津市電力公司濱海供電分公司，天津 300450)
    

    
	 
    

    
	
    
		    摘 要：在弱電網(wǎng)下，電網(wǎng)阻抗的存在會(huì)削弱三相逆變器的穩(wěn)定裕度，阻抗分析法可針對(duì)并網(wǎng)逆變器與弱電網(wǎng)之間的相互作用開(kāi)展研究。分析了逆變器阻抗重塑控制策略，引入正負(fù)序并聯(lián)校正阻抗進(jìn)行逆變器的阻抗重塑；通過(guò)優(yōu)化比例前饋系數(shù)和改進(jìn)鎖相環(huán)結(jié)構(gòu)增大系統(tǒng)的穩(wěn)定裕度，擴(kuò)展三相逆變器并網(wǎng)系統(tǒng)穩(wěn)定運(yùn)行時(shí)電網(wǎng)阻抗范圍，提高了系統(tǒng)對(duì)弱電網(wǎng)的適應(yīng)性；將所提控制策略應(yīng)用于三相逆變器并網(wǎng)系統(tǒng)并通過(guò) MATLAB/Simulink 進(jìn)行仿真，結(jié)果驗(yàn)證了該控制策略的有效性。
    
	
    
		    關(guān)鍵詞： 弱電網(wǎng)；并網(wǎng)逆變器；序阻抗；阻抗重塑；穩(wěn)定性
    
	
    
		    中圖分類(lèi)號(hào)：TM464     文獻(xiàn)標(biāo)識(shí)碼：A     文章編號(hào)：1007-3175(2023)07-0014-07
    
	
    
		 
    
	
    
		
    
			Research on Grid-Connected Stability of Inverters Based on
    
		
    
			Impedance Reshaping Analysis
    
		
    
			 
    
		
    
			
    
				YANG Ru-nan, LIU Ming-yang, LI De-qiang, XU Yi-xiang, SU Xu
    
			
    
				（State Grid Tianjin Electric Power Company Binhai Power Supply Company, Tianjin 300450, China）
    
			
    
				 
    
			
    
				
    
					    Abstract: The existence of grid impedance weakens the stability margin of three-phase inverters in the weak grids, and the impedance analysis method can be used to analyze the interaction between grid-connected inverters and weak grids.In the paper, the impedance reshaping control strategy of inverters is analyzed, and the positive and negative sequence parallel correction impedance is introduced for impedance reshaping.The system stability margin increases through optimizing proportional feedforward coefficients and improving phase-locked loop structure, and the system adaptability to the weak grid improves by expanding the grid impedance range as the grid-connected system of three-phase inverters operates stably.The control strategy is applied to the grid-connected system of three-phase inverters and is simulated through MATLAB/Simulink, and the above results verify its effectiveness.
    
				
    
					    Key words: weak grid; grid-connected inverter; sequence impedance; impedance reshaping; stability
    
				
    
					 
    
				
    
					
    
						參考文獻(xiàn)
    
					
    
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