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

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基于能量函數(shù)法的含VSG-IIDG電力系統(tǒng)暫態(tài)穩(wěn)定分析

來源:電工電氣發(fā)布時間:2019-03-22 13:22 瀏覽次數(shù):811
基于能量函數(shù)法的含VSG-IIDG電力系統(tǒng)暫態(tài)穩(wěn)定分析
 
焦永輝1,卜京1,張寧宇2,周前2,汪成根2,劉建坤2
(1 南京理工大學 自動化學院,江蘇 南京 210094;2 國網(wǎng)江蘇省電力公司電力科學研究院,江蘇 南京 211100)
 
    摘 要:采用虛擬同步發(fā)電機(VSG)策略的電壓源逆變型分布式電源(IIDG)的暫態(tài)特性與同步發(fā)電機類似,而其電流飽和環(huán)節(jié)使其暫態(tài)特性又有別于同步發(fā)電機,使系統(tǒng)暫態(tài)穩(wěn)定分析變得更加復雜?;谀芰亢瘮?shù)法提出了一種計及VSG-IIDG電力系統(tǒng)的暫態(tài)能量函數(shù)。通過分析暫態(tài)過程中逆變器的暫態(tài)特性,以此構建其虛擬功角模型,并分析了電流飽和環(huán)節(jié)對能量函數(shù)的影響,基于此,采用輸出功率擬合方法構建了計及VSG-IIDG的系統(tǒng)暫態(tài)能量函數(shù)。利用MATLAB/Simulink進行了仿真,驗證了該方法的有效性。
    關鍵詞:虛擬同步發(fā)電機;逆變器;虛擬功角特性;暫態(tài)穩(wěn)定;能量函數(shù);功率擬合
    中圖分類號:TM712     文獻標識碼:A     文章編號:1007-3175(2019)03-0007-05
 
Transient Stability Analysis with VSG-IIDG Power System Based on Energy Function
 
JIAO Yong-hui1, BU Jing1, ZHANG Ning-yu2, ZHOU Qian2, WANG Cheng-gen2, LIU Jian-kun2
(1 School of Automation, Nanjing University of Science and Technology, Nanjing 210094, China;
2 State Grid Jiangsu Electric Power Company Research Institute, Nanjing 2111 00, China)
 
    Abstract: The transient characteristics of the voltage source IIDG using VSG strategy are similar to the synchronous generator, but when the current saturation link is considered, their transient characteristics will be different, and the system transient analysis will be more complex. This paper put forward a kind of transient energy function with VSG-IIDG power system based on the energy function. This paper built the virtual power angle model of the inverter by analyzing the inverter transient characteristic during the transient process and analyzed the influence of the current saturation link on the energy function. On the basis of this, the output power fitting method was adopted to establish the transient energy function with the VSG-IIDG power system. Simulink in MATLAB was used to carry out simulation and to verify the effectiveness of this method.
    Key words: VSG; inverter; virtual power angle characteristic; transient stability; energy function; output power fitting
 
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