【摘要】：隨著電力電子技術(shù)的發(fā)展,變速恒頻DFIG風(fēng)電機(jī)組可通過虛擬慣量控制和超速控制減載運(yùn)行參與電網(wǎng)頻率調(diào)整。針對含DFIG風(fēng)電機(jī)組的風(fēng)光柴中壓微電網(wǎng),采用特征值分析方法,分析DFIG風(fēng)電機(jī)組虛擬慣量控制、超速控制和柴油機(jī)調(diào)速器控制參數(shù)變化時微電網(wǎng)的特征值軌跡,找出反映微電網(wǎng)頻率響應(yīng)特性的典型特征值。并通過分析不同虛擬慣量控制和超速控制參數(shù)對應(yīng)的典型特征值變化軌跡,判斷微電網(wǎng)頻率穩(wěn)定性的變化,得到虛擬慣量控制和超速控制參數(shù)合理選取范圍。為改善頻率控制參數(shù)選取過大產(chǎn)生的頻率振蕩問題,進(jìn)一步改進(jìn)DFIG風(fēng)電機(jī)組有功功率控制系統(tǒng)PI控制參數(shù),從而在改善微電網(wǎng)頻率動態(tài)響應(yīng)特性的基礎(chǔ)上提高了微電網(wǎng)小干擾穩(wěn)定性。最后,在DIg SILENT/Power Factory仿真軟件中搭建微電網(wǎng)模型,通過動態(tài)時域仿真驗證所提方法對提高微電網(wǎng)頻率穩(wěn)定性和小干擾穩(wěn)定性的有效性。
[Abstract]:With the development of power electronic technology, variable speed constant frequency DFIG wind turbine can take part in power network frequency adjustment through virtual inertia control and overspeed control. The characteristic value locus of DFIG wind turbine with variable parameters of virtual inertia control, overspeed control and diesel governor control is analyzed by using eigenvalue analysis method for the wind-firewood medium-voltage microgrid with DFIG wind turbine. The typical eigenvalues reflecting the frequency response of microgrid are found out. By analyzing the variation locus of typical eigenvalues corresponding to different virtual inertia control and overspeed control parameters, the variation of frequency stability of microgrid is judged, and the reasonable selection range of virtual inertia control and overspeed control parameters is obtained. In order to improve the frequency oscillation caused by excessive selection of frequency control parameters, the PI control parameters of active power control system of DFIG wind turbine are further improved. Therefore, the stability of micro-grid with small interference is improved on the basis of improving the frequency dynamic response characteristics of microgrid. Finally, the microgrid model is built in the DIg SILENT/Power Factory simulation software, and the effectiveness of the proposed method in improving the frequency stability and small disturbance stability of the microgrid is verified by dynamic time-domain simulation.
【作者單位】： 上海電力學(xué)院電氣工程學(xué)院;
【基金】：國家自然科學(xué)基金項目(51207087) 上海綠色能源并網(wǎng)工程技術(shù)研究中心資助項目(13DZ2251900)~~
【分類號】：TM315;TM727

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