本文選題：電壓暫降 + 電壓短時(shí)中斷�。� 參考：《中國礦業(yè)大學(xué)（北京）》2014年博士論文

【摘要】：電壓暫降和短時(shí)中斷是我國面臨的重要電能質(zhì)量問題，兩者占到全部工業(yè)電能質(zhì)量問題的92%以上。首先研究了電力系統(tǒng)高壓輸配電線路中的電壓暫降經(jīng)變壓器向受電終端低壓母線傳遞時(shí)的變化規(guī)律。根據(jù)簡(jiǎn)化模型，研究了電壓短時(shí)中斷后三相異步電動(dòng)機(jī)的最大低電壓穿越能力。應(yīng)用對(duì)稱分量法，提出了三相不對(duì)稱電壓暫降時(shí)電動(dòng)機(jī)轉(zhuǎn)差率與臨界時(shí)間的計(jì)算方法。為了減小電壓暫降對(duì)電動(dòng)機(jī)等敏感設(shè)備的影響，需要對(duì)其補(bǔ)償，而電壓暫降的檢測(cè)是實(shí)現(xiàn)補(bǔ)償?shù)那疤�。提出了基于微分方程的單相電壓暫降檢測(cè)法，應(yīng)用同步坐標(biāo)變換法實(shí)現(xiàn)了三相不對(duì)稱電壓暫降的檢測(cè)。提出了基于αβ靜止坐標(biāo)系改進(jìn)瞬時(shí)對(duì)稱分量法的電壓暫降檢測(cè)新方法。將復(fù)域瞬時(shí)對(duì)稱分量法引入到電壓暫降的檢測(cè)中，，提出了復(fù)域abc/dq變換和120/dq變換兩種檢測(cè)方法。Matlab下的仿真結(jié)果證明了所提檢測(cè)方法的有效性。最后，介紹了分布式電壓暫降監(jiān)測(cè)系統(tǒng)的整體結(jié)構(gòu)與軟件組成。
[Abstract]:Voltage sags and short-time interruptions are the important problems of power quality in China. Both of them account for more than 92% of the total industrial power quality problems. First, the change rules of voltage sags in the power transmission and distribution lines of the power system are studied by the transformer to the low-voltage busbar of the terminal. The maximum low voltage crossing ability of the three phase asynchronous motor after the fracture is used. Using the symmetric component method, the calculation method of the change rate and the critical time of the motor is proposed. In order to reduce the influence of the voltage sags to the sensitive equipment such as the motor, it is necessary to compensate for the voltage sags, and the detection of voltage sags is the precondition of realizing the compensation. A single phase voltage sags detection method based on differential equation is proposed. The detection of three-phase asymmetric voltage sags is realized by using synchronous coordinate transformation method. A new method of Voltage Sags Detection is proposed based on the improved instantaneous symmetric component method based on the stationary coordinate system of alpha beta. The simulation results under the two detection methods of domain abc/dq transform and 120/dq transform,.Matlab, prove the effectiveness of the proposed method. Finally, the whole structure and software composition of the distributed voltage sags monitoring system are introduced.

【學(xué)位授予單位】：中國礦業(yè)大學(xué)（北京）
【學(xué)位級(jí)別】：博士
【學(xué)位授予年份】：2014
【分類號(hào)】：TM343.2

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本文編號(hào)：1817742