【摘要】：針對(duì)雙饋風(fēng)電機(jī)組機(jī)側(cè)變流器絕緣柵雙極型晶體管(IGBT)結(jié)溫波動(dòng)大的問(wèn)題,提出了一種抑制IGBT結(jié)溫且不影響機(jī)組運(yùn)行性能的機(jī)側(cè)變流器調(diào)制策略。首先,基于不連續(xù)空間矢量調(diào)制(DSVPWM)在一定負(fù)載功率因數(shù)角可降低變流器開關(guān)損耗的思路,通過(guò)推導(dǎo)雙饋風(fēng)電機(jī)組機(jī)側(cè)變流器功率因數(shù)角表達(dá)式,詳細(xì)分析了機(jī)側(cè)變流器功率因數(shù)角的變化范圍。其次,為了有效抑制IGBT結(jié)溫,針對(duì)機(jī)側(cè)變流器功率因數(shù)角變化范圍大的問(wèn)題,提出以機(jī)側(cè)變流器功率因數(shù)角變化范圍為依據(jù)的分段DSVPWM策略。最后,建立了考慮IGBT熱性能的雙饋風(fēng)電變流器電-熱耦合模型,對(duì)機(jī)組不同出力下的變流器電-熱性能進(jìn)行了仿真分析。結(jié)果表明,與傳統(tǒng)連續(xù)空間矢量調(diào)制(CSVPWM)策略相比,所提出的分段DSVPWM策略能有效抑制機(jī)側(cè)變流器IGBT結(jié)溫及結(jié)溫波動(dòng)。
[Abstract]:Aiming at the problem of large fluctuation of the junction temperature of insulated gate bipolar transistor (IGBT) in doubly fed wind turbine, a modulation strategy is proposed to suppress the junction temperature of IGBT without affecting the operation performance of the unit. Firstly, based on the idea that discontinuous space vector modulation (DSVPWM) can reduce the switching loss of converter at a certain load power factor angle, the expression of power factor angle of doubly-fed wind turbine side converter is derived. The variation range of power factor angle of converter is analyzed in detail. Secondly, in order to restrain the IGBT junction temperature effectively, a segmented DSVPWM strategy based on the variable range of power factor angle is proposed to solve the problem of the wide range of power factor angle variation of the converter at the side of the converter. Finally, the electric-thermal coupling model of doubly-fed wind power converter considering the thermal performance of IGBT is established, and the electro-thermal performance of doubly-fed wind power converter with different output is simulated and analyzed. The results show that compared with the traditional continuous space vector modulation (CSVPWM) strategy, the proposed segmented DSVPWM strategy can effectively suppress the junction temperature and junction temperature fluctuation of the converter IGBT.
【作者單位】： 重慶大學(xué)輸配電裝備及系統(tǒng)安全與新技術(shù)國(guó)家重點(diǎn)實(shí)驗(yàn)室;重慶科凱前衛(wèi)風(fēng)電設(shè)備有限責(zé)任公司;重慶三峽學(xué)院信號(hào)與信息處理重點(diǎn)實(shí)驗(yàn)室;
【基金】：國(guó)家自然科學(xué)基金資助項(xiàng)目(51377184) 國(guó)際科技合作專項(xiàng)項(xiàng)目(2013DFG61520) 重慶市集成示范計(jì)劃項(xiàng)目(CSTC2013JCSF70003) 重慶市重點(diǎn)產(chǎn)業(yè)共性關(guān)鍵技術(shù)創(chuàng)新專項(xiàng)項(xiàng)目(CSTC2015ZDCY-ZTZX0171)~~
【分類號(hào)】：TM46;TM614

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