【摘要】：目前,由于配電網(wǎng)自動化實際應(yīng)用較少,而現(xiàn)有的配電網(wǎng)因為不具備自愈功能,導(dǎo)致故障時用戶停電時間較長,并且無法實現(xiàn)非故障區(qū)域的負(fù)荷轉(zhuǎn)移;12k V真空斷路器在配電網(wǎng)中應(yīng)用廣泛,但是無法及時了解斷路器的健康狀況,只能通過定期檢修來排除故障隱患。論文通過帶有保護(hù)功能和斷路器在線監(jiān)測功能的DTU(Distribution Terminal Unit,配電終端)的研究,解決了上述問題,做了如下主要工作:1.設(shè)計了DTU裝置的整體硬件系統(tǒng),重點對裝置中的CPU主板模塊,IO模塊,TRIP模塊的硬件進(jìn)行設(shè)計。研究了DTU裝置的保護(hù)功能,當(dāng)線路中有故障發(fā)生時,快速識別故障,通過對配電開關(guān)的控制,隔離故障,恢復(fù)非故障區(qū)域的供電。研究了斷路器機械特性參數(shù)和分合閘線圈電流在判斷斷路器是否正常運行的作用。通過對相關(guān)傳感器的選擇,實現(xiàn)了斷路器機械特性參量的現(xiàn)場獲取,通過獲得的機械特性參量,繪制出斷路器行程-時間曲線和分合閘線圈電流曲線,用來對斷路器操作機構(gòu)是否出現(xiàn)異常進(jìn)行分析判斷。2.研究了在雙電源供電手拉手環(huán)網(wǎng)接線方式的配電網(wǎng)自動化方案中,不同的自愈控制方式下DTU裝置的應(yīng)用。針對在聯(lián)絡(luò)線故障,負(fù)荷開關(guān)出線方案故障和斷路器出線方案故障中,DTU如何配合主站對配電開關(guān)進(jìn)行控制,完成對故障區(qū)域的隔離和恢復(fù)非故障區(qū)域供電進(jìn)行了分析。建立了一套具備集中式自愈功能的配電網(wǎng)自動化方案演示系統(tǒng)。3.通過實驗,驗證了配電網(wǎng)自動化方案在不同故障點對于不同故障類型的自愈過程,測得了自愈時間。通過實際工程項目獲得的斷路器在線監(jiān)測波形,進(jìn)行分析對比,判斷可能的故障部位,在對斷路器進(jìn)行檢修后,驗證了故障部位判斷的正確性,從而驗證了DTU裝置斷路器在線監(jiān)測功能的可行性。通過實驗及實際工程項目驗證了論文所設(shè)計的DTU裝置的功能。
[Abstract]:At present, due to the lack of practical application of distribution network automation, the existing distribution network does not have self-healing function, which leads to the longer outage time of users and the failure to realize load transfer in non-fault areas. The 12kV vacuum circuit breaker is widely used in the distribution network, but it can not understand the health condition of the circuit breaker in time. Through the research of DTU (Distribution Terminal Unit, distribution terminal with protection function and circuit breaker on-line monitoring function, the above problems are solved, and the main work is as follows: 1. The whole hardware system of DTU device is designed, and the hardware of CPU motherboard module, IO module and TRIP module are mainly designed. The protection function of DTU device is studied. When there is a fault in the line, the fault can be quickly identified, and the power supply in the non-fault area can be restored by controlling the distribution switch and isolating the fault. The function of circuit breaker's mechanical characteristic parameter and current of closing coil to judge whether the circuit breaker is running normally or not is studied. Through the selection of related sensors, the field acquisition of circuit breaker mechanical characteristic parameters is realized. Through the obtained mechanical characteristic parameters, the circuit breaker travel time curve and closing coil current curve are drawn. Used to analyze and judge whether abnormal operation mechanism of circuit breaker. 2. In this paper, the application of DTU device under different self-healing control modes in the distribution network automation scheme of double-power supply hand-in-hand ring network connection is studied. In view of the fault of tie-line fault, load switch outlet scheme and circuit breaker outlet scheme, how to cooperate with the main station to control the distribution switch, and how to complete the isolation of the fault area and restore the power supply in the non-fault area are analyzed by DTU. A demonstration system of distribution network automation scheme with centralized self-healing function is established. Through experiments, the self-healing process of distribution network automation scheme for different fault types at different fault points is verified, and the self-healing time is measured. The on-line monitoring waveforms of circuit breakers obtained from actual engineering projects are analyzed and compared to judge the possible fault locations. After the circuit breaker is overhauled, the correctness of the fault location judgment is verified. The feasibility of on-line monitoring function of DTU circuit breaker is verified. The function of the DTU device designed in this paper is verified by experiments and practical projects.
【學(xué)位授予單位】：廈門理工學(xué)院
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2015
【分類號】：TM561

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