本文選題：配電自動(dòng)化　切入點(diǎn)：故障區(qū)段定位　出處：《天津理工大學(xué)》2017年碩士論文　論文類型：學(xué)位論文

【摘要】：隨著電力用戶對(duì)供電質(zhì)量的要求越來(lái)越高,配電網(wǎng)作為電力系統(tǒng)中直接與用戶相連的部分,其供電可靠性也越來(lái)越得到用戶的重視。一旦配電網(wǎng)發(fā)生故障,隨著停電范圍的擴(kuò)大和停電時(shí)間的延長(zhǎng),國(guó)民經(jīng)濟(jì)損失也會(huì)隨之增長(zhǎng)。因此,當(dāng)配電網(wǎng)發(fā)生故障時(shí),確保最大程度地縮小停電范圍和停電時(shí)間非常關(guān)鍵。近幾年,配電自動(dòng)化技術(shù)作為智能配電網(wǎng)技術(shù)的組成部分得到了廣泛重視。作為配電自動(dòng)化技術(shù)的核心,饋線自動(dòng)化技術(shù)是提高配電網(wǎng)供電可靠性的實(shí)用技術(shù),它通過(guò)配電終端FTU(Feeder Terminal Unit)采集互感器上送的電流和電壓信息,然后將這些信息進(jìn)行進(jìn)一步處理后上送到配電自動(dòng)化主站,主站再對(duì)這些信息進(jìn)行分析處理,最后實(shí)現(xiàn)對(duì)配電網(wǎng)運(yùn)行的有效控制,保證了對(duì)用戶的供電可靠性。當(dāng)配電網(wǎng)發(fā)生故障時(shí),主站通過(guò)分析處理FTU上送的配電網(wǎng)故障信息,實(shí)現(xiàn)對(duì)故障的快速定位和隔離,因此,和人工巡檢的方法相比,這種方法極大程度地減小了停電范圍和停電時(shí)間。配電網(wǎng)故障區(qū)段定位矩陣算法是基于饋線自動(dòng)化技術(shù)實(shí)現(xiàn)的,需要結(jié)合配電網(wǎng)網(wǎng)絡(luò)拓?fù)涞木仃嚹Ｐ秃虵TU上送的配電網(wǎng)故障信息,然后通過(guò)運(yùn)用故障判別原則來(lái)實(shí)現(xiàn)故障區(qū)段的定位。目前的矩陣算法利用基于數(shù)字量的故障判別原則實(shí)現(xiàn)配電網(wǎng)的故障區(qū)段定位,而由于實(shí)際配電網(wǎng)結(jié)構(gòu)繁瑣,故障情況也很復(fù)雜,導(dǎo)致目前的矩陣算法針對(duì)某些類型的故障情況無(wú)法實(shí)現(xiàn)準(zhǔn)確定位。本文針對(duì)矩陣算法提出了改進(jìn)措施,主要體現(xiàn)在設(shè)計(jì)了新的基于數(shù)字量和模擬量的故障判別原則,此改進(jìn)矩陣算法極大地提高了對(duì)故障區(qū)段定位的準(zhǔn)確性,本文通過(guò)算例分析和仿真結(jié)果驗(yàn)證了此算法的準(zhǔn)確性。由于FTU安裝在室外環(huán)境中,其采集數(shù)據(jù)和上送數(shù)據(jù)的過(guò)程易受到環(huán)境因素的影響,這樣會(huì)使主站接收到的配電網(wǎng)故障信息發(fā)生畸變,最終造成系統(tǒng)對(duì)故障區(qū)段的定位出現(xiàn)錯(cuò)誤。本文針對(duì)這個(gè)問(wèn)題提出了基于反推法的故障信息畸變修復(fù)方法,它能有效的對(duì)畸變信息進(jìn)行還原,最后本文通過(guò)算例分析和仿真結(jié)果驗(yàn)證了此修復(fù)方法的實(shí)用性。
[Abstract]:With the increasing demand of power users for power supply quality, distribution network, as a part of power system directly connected with users, has been paid more and more attention to its power supply reliability. With the expansion of blackout range and the prolongation of blackout time, the loss of national economy will also increase. Therefore, when the distribution network fails, it is very important to ensure that the blackout range and time are minimized. As the core of distribution automation technology, feeder automation technology is a practical technology to improve the reliability of distribution network power supply. It collects the current and voltage information from the transformer through FTU(Feeder Terminal Unit, and then processes the information further and sends it to the main station of distribution automation, which is then analyzed and processed by the main station. Finally, the effective control of distribution network operation is realized, which ensures the reliability of power supply to users. When the distribution network fails, the master station can quickly locate and isolate the fault by analyzing and processing the fault information sent up by FTU. Compared with the manual inspection method, this method greatly reduces the blackout range and blackout time. The algorithm of fault section location matrix is realized based on feeder automation technology. It is necessary to combine the matrix model of distribution network topology with the fault information of distribution network sent up by FTU. Then the fault section location is realized by using the principle of fault discrimination. The current matrix algorithm uses the principle of fault discrimination based on digital quantity to locate the fault section of the distribution network, but the actual distribution network structure is cumbersome. The fault situation is also very complex, which leads to the current matrix algorithm can not achieve accurate location for some types of fault situation. In this paper, the improvement measures for matrix algorithm are put forward. This improved matrix algorithm greatly improves the accuracy of fault section location. In this paper, the accuracy of the algorithm is verified by example analysis and simulation results. Because FTU is installed in outdoor environment, the process of collecting and sending data is easily affected by environmental factors. In this way, the fault information received by the main station will be distorted, and finally the fault section will be located wrong. In this paper, a method of fault information distortion repair based on backstepping method is proposed in this paper. It can effectively restore the distortion information. Finally, the practicability of the proposed method is verified by example analysis and simulation results.
【學(xué)位授予單位】：天津理工大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2017
【分類號(hào)】：TM76;TM711

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