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

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雙饋風電場并網系統中UPFC阻尼控制策略研究

來源:電工電氣發(fā)布時間:2018-11-21 09:21 瀏覽次數:591
雙饋風電場并網系統中UPFC阻尼控制策略研究
 
李旭1,劉海濤1,秦高烽1,張鵬1,肖強2
(1 南京工程學院 電力工程學院,江蘇 南京 211167;2 國網鹽城供電公司,江蘇 鹽城 224002)
 
    摘 要:具有電壓支撐、功率調節(jié)功能的統一潮流控制器(UPFC) 在雙饋風電場并網系統中發(fā)揮重要作用?;诤蠻PFC 的單機無窮大系統數學模型,分析了UPFC對系統阻尼特性的作用,指出UPFC串并聯側注入電壓電流和發(fā)電機轉速偏差正相關能夠提高系統阻尼系數,在此基礎提出了一種附加轉速偏差信號的阻尼控制方法。該策略可實現電力系統穩(wěn)態(tài)時電壓和功率嚴格跟蹤參考值,系統受到擾動時可以維持電壓和功率在允許范圍內波動,同時提高系統的穩(wěn)定性,增強系統抑制振蕩的能力?;贒IgSILENT仿真平臺搭建標準三機九節(jié)點系統作為等效測試模型,驗證了改進的UPFC控制方法的有效性。
    關鍵詞:統一潮流控制器(UPFC);穩(wěn)定性;雙饋風電場;阻尼控制
    中圖分類號:TM614     文獻標識碼:A     文章編號:1007-3175(2018)11-0010-06
 
Unified Power Flow Controller Damping Control Strategy Research on Doubly Fed Wind Farm Grid-Connected System
 
LI Xu1, LIU Hai-tao1, QIN Gao-feng1, ZHANG Peng1, XIAO Qiang2
(1 School of Electric Power Engineering, Nanjing Institute of Technology, Nanjing 21116 7, China;
2 State Grid Yancheng Power Supply Company, Yancheng 224002, China)
 
    Abstract: The unified power flow controller (UPFC) with the functions of voltage support and power regulation plays an important role in the doubly fed wind farm grid-connected system. Based on a single-machine infinite bus system mathematical model with UPFC, this paper analyzed the effect of UPFC on the damping characteristics of the system. It was pointed that if the injected voltage and current were positively related to speed deviation of generator, The UPFC could improve damping coefficient. On the basis of this, this paper proposed an additional speed deviation signal damping control strategy, which realized the bus voltage and power flow track reference value strictly at the time of stable electrical power system. When the disturbance occurred, the voltage and power fluctuations were kept within the allowable range, the system stability was improved and the ability of suppressing oscillation could be enhanced. Based on the DIgSILENT simulation platform, the standard three-machine nine-node system was set up as the equivalent test model, which verifies the effectiveness of the improved UPFC control method.
    Key words: unified power flow controller; stability; doubly fed wind farm; damping control
 
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