大規(guī)模風電集中接入對系統(tǒng)短路電流的影響分析
周專,呂盼,宋新甫,張增強,劉建亮
(1 國網(wǎng)新疆電力公司經(jīng)濟技術研究院,新疆 烏魯木齊 830016;
2 國網(wǎng)新疆電力公司奎屯供電公司,新疆 奎屯 832100)
摘 要:規(guī)?;L電集中接入電網(wǎng),將對系統(tǒng)提供一定的短路電流,影響設備選型、升壓站中低壓側的運行方式等。通過對不同風電機組型號(雙饋式和直驅(qū)式)及不同容量的單個風電機組對系統(tǒng)提供的短路電流分析,根據(jù)風電機組短路PMU 錄波曲線和風電機組模型短路仿真曲線,提出了一種工程計算方法,計算出不同型號和不同容量的風電機組等值次暫態(tài)電抗,并結合短路電流理論計算模型,分析單個風電場以及風電匯集站對系統(tǒng)提供的短路電流,結果表明,規(guī)模化風電的集中接入,對系統(tǒng)提供的短路電流不可忽略。
關鍵詞:風電場;風電機組;次暫態(tài)電抗;短路電流
中圖分類號:TM614 文獻標識碼:A 文章編號:1007-3175(2015)11-0013-04
Impact of Large-Scale Wind Power Centralized Access on System Short-Circuit Current
ZHOU Zhuan, LV Pan, SONG
Xin-fu, ZHANG Zeng-qiang, LIU Jian-liang
(1 State Grid Electric Power Company Xinjiang Institute of Economic Research Technology, Urumqi 830016, China;
2 State Grid Xinjiang Power Company Kuitun Power Supply Company, Kuitun 832100, China)
Abstract: Large-scale wind power centralized access to the power grid caused many problems, such as short-circuit current, equipment selection and mode of operation at middle and low voltage side in booster station etc. Through the different wind turbine generator models (dual-fed and direct drive) and single wind turbine generator of different capacity, this paper analyzed the system short-circuit current. Based on wind turbines short-circuit PMU recorded wave curve and wind turbine generator model short-circuit simulation curve, this paper proposed an engineering calculation method to calculate the different models and capacity wind turbine generator equivalent subtransient reactance. Combining with the theoretical calculation model of short-circuit current, this paper analyzed the system short-circuit current provided by the single wind farm and wind power centralized station. The result shows that the large-scale wind power centralized access provides the un-neglected short-circuit current for the system.
Key words: wind farm; wind turbine generator; subtransient reactance; short-circuit current
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