本文選題：直驅(qū)風(fēng)機(jī) + 弱交流系統(tǒng)　； 參考：《中國(guó)電機(jī)工程學(xué)報(bào)》2016年09期

【摘要】：近年來(lái),國(guó)內(nèi)許多地區(qū)的直驅(qū)風(fēng)機(jī)風(fēng)電場(chǎng)在附近電網(wǎng)沒(méi)有串補(bǔ)的情況下出現(xiàn)了持續(xù)的次同步頻率范圍的功率振蕩。為深入研究該問(wèn)題,該文建立典型直驅(qū)風(fēng)機(jī)風(fēng)電場(chǎng)接入交流電網(wǎng)的等值系統(tǒng)模型,通過(guò)電磁暫態(tài)仿真、阻抗模型和小信號(hào)分析研究次同步振蕩產(chǎn)生的機(jī)理;分析接入交流電網(wǎng)強(qiáng)弱、風(fēng)機(jī)出力、并網(wǎng)風(fēng)機(jī)臺(tái)數(shù)、風(fēng)機(jī)控制參數(shù)及動(dòng)態(tài)無(wú)功補(bǔ)償設(shè)備對(duì)振蕩特性的影響;結(jié)果表明,多臺(tái)直驅(qū)風(fēng)機(jī)通過(guò)弱交流系統(tǒng)并網(wǎng)時(shí)會(huì)出現(xiàn)次同步振蕩模態(tài),直驅(qū)風(fēng)機(jī)在該振蕩模態(tài)頻率上表現(xiàn)為"具有小值負(fù)電阻的容性阻抗",與交流電網(wǎng)的電感構(gòu)成諧振回路,并因負(fù)電阻效應(yīng)而導(dǎo)致危險(xiǎn)的功率振蕩現(xiàn)象。最后,討論了這種次同步振蕩問(wèn)題的潛在危害及其防范措施。
[Abstract]:In recent years, in many areas of China, the power oscillation of sub-synchronous frequency range has been observed in the wind farm of direct-drive fan in the vicinity of power grid without series compensation. In order to study this problem deeply, the equivalent system model of typical direct drive fan wind farm connected to AC power network is established, and the mechanism of sub-synchronous oscillation is studied by electromagnetic transient simulation, impedance model and small signal analysis. The influence of the strength of the connected AC power grid, the output force of the fan, the number of the fan connected to the grid, the control parameters of the fan and the dynamic reactive power compensation equipment on the oscillation characteristics are analyzed. When several direct-drive fans connect to grid through weak AC system, the sub-synchronous oscillation mode will appear. The frequency of direct-drive fan is "capacitive impedance with small negative resistance", which forms the resonant circuit with the inductance of AC power network. And the phenomenon of dangerous power oscillation is caused by the negative resistance effect. Finally, the potential harm of this sub-synchronous oscillation problem and its preventive measures are discussed.
【作者單位】： 電力系統(tǒng)及發(fā)電設(shè)備控制與仿真國(guó)家重點(diǎn)實(shí)驗(yàn)室(清華大學(xué)電機(jī)系);國(guó)家電力調(diào)度控制中心;金風(fēng)科技股份有限公司;
【基金】：國(guó)家自然科學(xué)基金項(xiàng)目(51322701) 國(guó)家電網(wǎng)公司科技項(xiàng)目(SGXJ0000KXJS1500669)~~
【分類(lèi)號(hào)】：TM712

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本文編號(hào)：1916591