發(fā)布時(shí)間：2018-03-14 18:16

  本文選題：異步發(fā)電機(jī)　切入點(diǎn)：穩(wěn)壓穩(wěn)頻　出處：《廣西大學(xué)學(xué)報(bào)(自然科學(xué)版)》2014年06期 　論文類型：期刊論文

【摘要】：針對獨(dú)立異步發(fā)電機(jī)加載后電壓和頻率跌落的特點(diǎn),設(shè)計(jì)了一種帶儲能系統(tǒng)的靜止同步補(bǔ)償器(STATCOM)并聯(lián)補(bǔ)償異步發(fā)電機(jī),以維持帶載后機(jī)端電壓和頻率的穩(wěn)定;在三相四線系統(tǒng)中采用Zig-Zag變壓器重構(gòu)中性點(diǎn),為零序電流提供通路;同時(shí),為避免因機(jī)端電壓不平衡可能會(huì)產(chǎn)生的大量定子負(fù)序電流致使發(fā)電機(jī)異常運(yùn)行的情況,可在逆變器脈寬調(diào)制三相調(diào)制參考電流波中注入相應(yīng)的負(fù)序分量來抵消。MATLAB/Simulink的仿真結(jié)果表明,該控制方法能夠有效改善異步發(fā)電機(jī)的端口特性;系統(tǒng)在Y/yn變壓器的仿真結(jié)果更說明了三相負(fù)載不對稱較嚴(yán)重時(shí)采用Zig-Zag變壓器具有平衡系統(tǒng)電壓、抑制零序電流等優(yōu)越性。
[Abstract]:According to the characteristics of voltage and frequency drop after loading, a static synchronous compensator (STATCOM) parallel compensation asynchronous generator with energy storage system is designed to maintain the stability of terminal voltage and frequency. In the three-phase four-wire system, Zig-Zag transformer is used to reconstruct the neutral point to provide the path for the zero-sequence current, and to avoid the abnormal operation of the generator caused by a large number of stator negative sequence currents caused by the unbalanced terminal voltage. The simulation results of MATLAB / Simulink show that the proposed control method can effectively improve the port characteristics of asynchronous generators by injecting the corresponding negative sequence components into the three-phase modulation reference current wave of inverter pulse width modulation. The simulation results of MATLAB / Simulink show that the proposed control method can effectively improve the port characteristics of asynchronous generators. The simulation results of Yryn transformer show that the Zig-Zag transformer has the advantages of balancing the system voltage and suppressing the zero sequence current when the three-phase load asymmetry is serious.
【作者單位】： 廣西大學(xué)電氣工程學(xué)院;
【基金】：國家自然科學(xué)基金資助項(xiàng)目(51177018) 南寧市科學(xué)研究與技術(shù)開發(fā)計(jì)劃項(xiàng)目(20131048)
【分類號】：TM31

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本文編號：1612373