本文選題：配電網(wǎng)　切入點：故障定位　出處：《大連理工大學》2016年碩士論文　論文類型：學位論文

【摘要】：配電網(wǎng)作為連接電網(wǎng)和用戶的橋梁,其供電可靠性對于電網(wǎng)和用戶都有十分重要的意義。隨著電力技術的不斷發(fā)展,配電自動化水平的不斷提高,有效地保證了配電網(wǎng)的安全、穩(wěn)定、可靠運行,而配電網(wǎng)的故障定位和供電恢復是配電自動化技術的基礎環(huán)節(jié),直接影響配電網(wǎng)自動化水平的高低,從而決定著配電網(wǎng)的運行水平。故本文選擇配電網(wǎng)的故障定位與供電恢復作為研究課題。首先,配網(wǎng)故障依據(jù)故障電流大小可分為單相接地故障和短路故障兩種。接著分別研究兩種故障的故障特征,總結出相應的故障定位原理,依據(jù)原理制定實施步驟。根據(jù)中性點接地方式,單相接地故障又分為中性點不接地系統(tǒng)和中性點經(jīng)消弧線圈接地兩種。配電網(wǎng)發(fā)生短路故障后,依據(jù)故障路徑存在故障電流,非故障路徑不存在故障電流的特點,從而可以進行故障定位。最后,通過編程實現(xiàn)相間定位功能,并嵌入實際的配網(wǎng)系統(tǒng),測試結果表明可以快速準確的實現(xiàn)相間故障定位。配網(wǎng)潮流計算是配網(wǎng)供電恢復的基礎,因此重點介紹了潮流計算中常見的前推回代法,給出詳細的計算過程,并結合算例有效證明了計算的可行性。最后,介紹了基于啟發(fā)式規(guī)則的配電網(wǎng)供電恢復。依據(jù)配電網(wǎng)恢復的相關要求列出了其目標函數(shù)及約束條件；依據(jù)配電網(wǎng)的實際運行經(jīng)驗,得出配電網(wǎng)供電恢復常用的啟發(fā)式規(guī)則；總結出只考慮與失電區(qū)域直接相連的聯(lián)絡開關,實現(xiàn)不同恢復策略下的故障恢復,并采用MATLAB編程有效驗證了基于啟發(fā)式搜索規(guī)則對配電網(wǎng)的供電恢復的作用。最后,通過編程實現(xiàn)供電故障恢復功能,并嵌入實際的配網(wǎng)系統(tǒng),測試結果表明可以有效地恢復供電。
[Abstract]:As a bridge between power network and users, the reliability of distribution network is very important for both power grid and users. With the development of power technology and the continuous improvement of distribution automation level, the security of distribution network is effectively guaranteed. Stable and reliable operation, and distribution network fault location and power supply recovery is the basic link of distribution automation technology, directly affect the level of distribution network automation, Therefore, this paper chooses the fault location and power supply recovery of distribution network as the research topic. Distribution network fault can be divided into single-phase grounding fault and short-circuit fault according to the fault current. Secondly, the fault characteristics of the two kinds of fault are studied, and the corresponding fault location principle is summarized. According to the principle of grounding, the single-phase grounding fault can be divided into two types: neutral ungrounded system and neutral point grounding through arc-suppression coil. After short-circuit fault occurs in distribution network, fault current exists according to fault path. The non-fault path does not have the characteristic of fault current, so fault location can be carried out. Finally, the function of phase-to-phase location is realized by programming and embedded in the actual distribution network system. The test results show that interphase fault location can be realized quickly and accurately. Distribution network power flow calculation is the basis of distribution network power supply recovery. Therefore, the common forward push-back substitution method in power flow calculation is introduced, and the detailed calculation process is given. Finally, the heuristic rule based distribution network power supply restoration is introduced. According to the relevant requirements of distribution network restoration, the objective function and constraint conditions are listed. According to the practical operation experience of distribution network, the heuristic rule of power supply restoration in distribution network is obtained, and the fault recovery under different recovery strategies is realized by considering only the contact switch which is directly connected with the power loss area. The effect of heuristic search rule on power supply recovery of distribution network is verified by MATLAB programming. Finally, the function of power supply fault recovery is realized by programming, and the actual distribution network system is embedded. The test results show that the power supply can be restored effectively.
【學位授予單位】：大連理工大學
【學位級別】：碩士
【學位授予年份】：2016
【分類號】：TM727

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