本文關(guān)鍵詞：電壓暫降中相位因素對(duì)異步電機(jī)運(yùn)行性能的影響　出處：《電機(jī)與控制應(yīng)用》2016年11期 　論文類型：期刊論文

  更多相關(guān)文章： 電壓暫降 相位跳變 暫降起始點(diǎn) 異步電機(jī)

【摘要】：電壓暫降問題嚴(yán)重影響異步電機(jī)的安全穩(wěn)定運(yùn)行,已成為備受關(guān)注的電能質(zhì)量問題。為了獲得電壓暫降相位因素(相位跳變與暫降起始點(diǎn))對(duì)電機(jī)運(yùn)行性能的影響規(guī)律,建立了能夠模擬電壓暫降的電機(jī)仿真模型,以5.5 k W、55 k W和135 k W三種電機(jī)為例,系統(tǒng)地研究了電壓暫降中的相位跳變與暫降起始點(diǎn)對(duì)定子電流峰值、轉(zhuǎn)矩峰值、轉(zhuǎn)速及臨界清除時(shí)間的影響。結(jié)果表明,當(dāng)暫降過程中計(jì)及相位跳變因素時(shí),定子電流與轉(zhuǎn)矩峰值顯著增加,轉(zhuǎn)速跌落更加嚴(yán)重且臨界清除時(shí)間相對(duì)縮短;但暫降起始點(diǎn)對(duì)上述性能指標(biāo)影響較小。以5.5 k W電機(jī)為例進(jìn)行了仿真試驗(yàn)對(duì)比,驗(yàn)證了分析結(jié)果的正確性。
[Abstract]:Voltage sag seriously affects the safe and stable operation of asynchronous motor. In order to obtain the effect of phase factor (phase jump and initial point) of voltage sag on the performance of motor, it has become a concerned problem of power quality. The simulation model of the motor which can simulate voltage sag is established. Taking 5.5 kW 55kW and 135kW for example. The effects of phase jump and initial point of voltage sag on stator current peak, torque peak, rotational speed and critical clearance time are systematically studied. The results show that the phase jump factor is taken into account in the process of voltage sag. The peak value of stator current and torque is significantly increased, the speed drop is more serious and the critical clearance time is relatively shorter. However, the initial point of the sags has little effect on the above performance indexes. The simulation results of 5.5 kW motor are compared to verify the correctness of the analysis results.
【作者單位】： 遼寧軌道交通職業(yè)學(xué)院;
【分類號(hào)】：TM343
【正文快照】： 0引言 在眾多電能質(zhì)量問題中,電壓暫降是最嚴(yán)重的電能質(zhì)量問題之一[1]。IEEE標(biāo)準(zhǔn)將其定義為電壓幅值下降到額定值的10%~90%,暫降持續(xù)時(shí)間為0.5個(gè)周波到1 min[2]。異步電機(jī)作為工業(yè)生產(chǎn)中廣泛應(yīng)用的設(shè)備,電壓暫降對(duì)其影響主要體現(xiàn)在兩方面:一是產(chǎn)生較大的沖擊電流和沖擊轉(zhuǎn)矩,，

本文編號(hào)：1427080