【摘要】：繼電保護(hù)是電力網(wǎng)的“安全衛(wèi)士”,任何設(shè)備都不允許無(wú)保護(hù)運(yùn)行。而配電網(wǎng)又是最末端電網(wǎng),保護(hù)配合問(wèn)題相當(dāng)困難,基本無(wú)級(jí)差。目前配電網(wǎng)保護(hù)均是依靠變電所10kV出線保護(hù)。當(dāng)配電網(wǎng)發(fā)生故障時(shí),均直接跳開(kāi)變電所出線,引起整條線路用戶(hù)停電。停電面積大,影響范圍廣,給用戶(hù)直接帶來(lái)的經(jīng)濟(jì)損失不可估量。本文研究的智能配電網(wǎng)繼電保護(hù)是在綜合了集中式饋線自動(dòng)化和智能分布式饋線自動(dòng)化優(yōu)點(diǎn)的前提下,基于EPON通信網(wǎng)絡(luò),提出了一種全新的配電網(wǎng)保護(hù)控制方法。該保護(hù)控制方法在系統(tǒng)組織架構(gòu)上提出了時(shí)間維與空間維的概念。通過(guò)兩者協(xié)調(diào)配合,提升配電網(wǎng)繼電保護(hù)性能和快速恢復(fù)非故障區(qū)域供電能力。空間維度主要分為主站層、區(qū)域?qū)优c終端層,通過(guò)分層、分布、開(kāi)放的網(wǎng)絡(luò)系統(tǒng),實(shí)現(xiàn)系統(tǒng)各層次的協(xié)調(diào)。時(shí)間維度上主要構(gòu)筑了智能配電網(wǎng)的三層保護(hù)防線,實(shí)現(xiàn)了配電網(wǎng)繼電保護(hù)無(wú)級(jí)差配合。在保護(hù)動(dòng)作原理方面,首先對(duì)配電網(wǎng)進(jìn)行了網(wǎng)架區(qū)域劃分,根據(jù)線路故障時(shí),各區(qū)域不同的特點(diǎn),研究了保護(hù)故障區(qū)域判據(jù),且能適應(yīng)配電網(wǎng)開(kāi)環(huán)、閉環(huán)、分布式電源接入等各種運(yùn)行方式。確定了智能配電網(wǎng)保護(hù)通信網(wǎng)絡(luò),終端層智能終端經(jīng)過(guò)EPON網(wǎng)絡(luò)互聯(lián),通過(guò)利用IEC61850 GOOSE技術(shù)與各相鄰智能終端之間橫向通信,不依賴(lài)于主站層,實(shí)現(xiàn)配電網(wǎng)故障點(diǎn)的快速定位與隔離。在故障成功隔離后,通過(guò)區(qū)域?qū)涌刂谱诱镜目刂?主要研究了非故障區(qū)域怎樣恢復(fù)供電,實(shí)現(xiàn)智能配電網(wǎng)的一個(gè)自愈功能。針對(duì)自愈功能的研究,主要探討了區(qū)域備投策略?xún)?yōu)先級(jí)原則、區(qū)域備投實(shí)現(xiàn)方式以及區(qū)域備投充放電條件等。且能夠適應(yīng)分布式電源的接入,自適應(yīng)電網(wǎng)運(yùn)行方式的調(diào)整。通過(guò)對(duì)網(wǎng)絡(luò)拓?fù)浔Ｗo(hù)裝置與區(qū)域控制子站GOOSE通信測(cè)試表明,該保護(hù)控制系統(tǒng)能精確定位故障范圍并迅速隔離,且能通過(guò)區(qū)域控制子站備投功能實(shí)現(xiàn)非故障區(qū)域的持續(xù)供電,對(duì)提高系統(tǒng)供電可靠性意義重大。
[Abstract]:Relay protection is the "security guard" of the power network, and no equipment is allowed to operate without protection. Distribution network is the most terminal network, protection coordination problem is very difficult, basically no differential. At present, distribution network protection is dependent on substation 10kV line protection. When the distribution network breaks down, they all jump directly out of the substation and cause the power failure of the whole line. The power cut area is large, the influence scope is wide, the direct economic loss that brings to the user is inestimable. On the premise of integrating the advantages of centralized feeder automation and intelligent distributed feeder automation, the intelligent distribution network relay protection is studied in this paper. Based on EPON communication network, a new control method of distribution network protection is proposed. In this method, the concepts of time dimension and space dimension are put forward in the system organization framework. Through the coordination of the two, the performance of relay protection and the ability of fast recovery of power supply in non-fault area can be improved. The spatial dimension is mainly divided into main station layer, area layer and terminal layer. The coordination of all levels of the system is realized through hierarchical, distributed and open network system. In time dimension, the three-layer protection defense line of smart distribution network is constructed, and no differential coordination of relay protection in distribution network is realized. In the aspect of protection operation principle, first of all, the distribution network is divided into the grid area. According to the different characteristics of each region, the protection fault zone criterion is studied, and it can adapt to the distribution network open loop and closed loop. Distributed power access and other modes of operation. The intelligent distribution network protection communication network is determined. The terminal layer intelligent terminal is interconnected through the EPON network. By using IEC61850 GOOSE technology to communicate horizontally with each adjacent intelligent terminal, it does not depend on the master layer. The fast location and isolation of distribution network fault points are realized. After the successful isolation of the fault, through the control of the sub-station of the area layer control, the paper mainly studies how to restore the power supply in the non-fault area and realize a self-healing function of the intelligent distribution network. Based on the research of self-healing function, this paper mainly discusses the priority principle of regional standby strategy, the implementation mode of regional standby, and the conditions of regional standby charging and discharging. And can adapt to the access of distributed power supply, adaptive power grid operation mode adjustment. The GOOSE communication test between the network topology protection device and the regional control sub-station shows that the protection control system can accurately locate the fault range and isolate rapidly, and can realize the continuous power supply in the non-fault area through the regional control sub-station backup function. It is of great significance to improve the reliability of power supply system.
【學(xué)位授予單位】：華北電力大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2015
【分類(lèi)號(hào)】：TM76;TM77

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