【摘要】：本文針對(duì)基于IEC61850標(biāo)準(zhǔn)的數(shù)字化變電站通信網(wǎng)絡(luò)進(jìn)行了研究,提出了一種基于IPACT算法的數(shù)字化變電站專用EPON通信系統(tǒng),通過該專用通信系統(tǒng)組建過程層網(wǎng)絡(luò),實(shí)現(xiàn)GOOSE報(bào)文和SV報(bào)文的發(fā)送。經(jīng)過理論分析計(jì)算和實(shí)際測(cè)試,該EPON系統(tǒng)可滿足IEC61850標(biāo)準(zhǔn)中的過程層通信網(wǎng)絡(luò)要求。首先研究基于IEC61850標(biāo)準(zhǔn)的數(shù)字化變電站結(jié)構(gòu)體系與數(shù)據(jù)報(bào)文。IEC61850標(biāo)準(zhǔn)將數(shù)字化變電分為變電站層、間隔層和過程層3層架構(gòu)。變電站層和間隔層之間為站控層網(wǎng)絡(luò),間隔層和過程層之間為過程層網(wǎng)絡(luò)。這兩張網(wǎng)根據(jù)所傳輸?shù)臄?shù)據(jù)類型可劃分成多張邏輯網(wǎng)絡(luò)。IEC61850標(biāo)準(zhǔn)定義了7類數(shù)據(jù)報(bào)文。這7類數(shù)據(jù)報(bào)文通過4種映射服務(wù)映射到MAC層,然后由不同的網(wǎng)絡(luò)傳輸。網(wǎng)絡(luò)必須滿足IEC61850規(guī)定的數(shù)據(jù)報(bào)文高實(shí)時(shí)性和可靠性的要求。鑒于SV網(wǎng)絡(luò)和GOOSE網(wǎng)絡(luò)是實(shí)時(shí)性要求最高的網(wǎng)絡(luò),本文主要針對(duì)SV網(wǎng)絡(luò)和GOOSE網(wǎng)絡(luò)開展研究。接著重點(diǎn)研究EPON技術(shù)的MPCP多點(diǎn)控制協(xié)議和經(jīng)典IPACT上行動(dòng)態(tài)帶寬分配算法。MPCP協(xié)議的5種控制幀在ONU注冊(cè)過程和上行帶寬分配中起重要的作用。對(duì)IPACT算法研究發(fā)現(xiàn)ONU的注冊(cè)時(shí)間與上行帶寬分配中的輪詢周期對(duì)數(shù)據(jù)的傳輸時(shí)延影響很大�？紤]到在EPON多業(yè)務(wù)傳輸時(shí)的QoS服務(wù)質(zhì)量,還針對(duì)802.1p、802.1Q協(xié)議以及基于優(yōu)先級(jí)的調(diào)度算法對(duì)EPON傳輸時(shí)延的影響加以討論。最后對(duì)EPON網(wǎng)絡(luò)進(jìn)行研究,研究結(jié)果表明EPON網(wǎng)絡(luò)可以適用于組建數(shù)字化變電站通信網(wǎng)。EPON網(wǎng)絡(luò)結(jié)構(gòu)符合數(shù)字化變電站對(duì)通信網(wǎng)絡(luò)拓?fù)涞囊�。根�?jù)數(shù)字化變電站的分層架構(gòu),站控層網(wǎng)絡(luò)和過程層網(wǎng)絡(luò)可以單獨(dú)組網(wǎng),由間隔層隔離這兩張網(wǎng)絡(luò),也可唯一組網(wǎng),從而簡(jiǎn)化間隔層設(shè)備和網(wǎng)絡(luò)結(jié)構(gòu),使變電站設(shè)備可共享同一網(wǎng)絡(luò)上的數(shù)據(jù)。通過分析和對(duì)比這兩種組網(wǎng)方式,以及對(duì)比星型、環(huán)型拓?fù)涞膬?yōu)缺點(diǎn),同時(shí)考慮EPON網(wǎng)絡(luò)結(jié)構(gòu)的特點(diǎn)和數(shù)字化變電站未來發(fā)展的方向,提出變電站通信網(wǎng)按星型拓?fù)浣Y(jié)構(gòu)組成唯一網(wǎng)絡(luò),在唯一網(wǎng)絡(luò)上由VLAN劃分為SV網(wǎng)絡(luò)和GOOSE網(wǎng)絡(luò)。由于公網(wǎng)EPON系統(tǒng)無法滿足IEC61850的要求,因此根據(jù)數(shù)字化變電站內(nèi)短距離通信的應(yīng)用環(huán)境對(duì)EPON進(jìn)行改進(jìn)。主要采用限制RTT時(shí)間、OLT對(duì)ONU的最大授權(quán)帶寬等方法縮短IPACT算法的輪詢周期,進(jìn)而在基于該IPACT算法的EPON系統(tǒng)中關(guān)閉發(fā)現(xiàn)過程使ONU至ONU傳輸時(shí)延進(jìn)一步縮短到SV和GOOSE報(bào)文的傳輸要求。理論計(jì)算出ONU至ONU傳輸時(shí)延的范圍后對(duì)專用EPON進(jìn)行測(cè)試。實(shí)測(cè)結(jié)果表明該EPON系統(tǒng)可以滿足變電站SV網(wǎng)絡(luò)和GOOSE網(wǎng)絡(luò)的傳輸要求。
[Abstract]:In this paper, the communication network of digital substation based on IEC61850 standard is studied, and a special EPON communication system for digital substation based on IPACT algorithm is proposed. Through this special communication system, a process layer network is established to realize the sending of GOOSE and SV messages. It can satisfy the requirement of process layer communication network in IEC 61850 standard. First, the structure system and data message of digital substation based on IEC 61850 standard are studied. These two networks can be divided into several logical networks according to the data types transmitted. The IEC 61850 standard defines seven types of data packets. These seven types of data packets are mapped to the MAC layer through four mapping services and then transmitted by different networks. The network must satisfy the requirements of high real-time and reliability of data packets specified in IEC 61850. Since SV network and GOOSE network are the most demanding real-time networks, this paper mainly focuses on SV network and GOOSE network. Then it focuses on MPCP multi-point control protocol of EPON technology and classical IPACT uplink dynamic bandwidth allocation algorithm. The five control frames of MPCP protocol play an important role in ONU registration process and uplink bandwidth allocation. The research of IPACT algorithm shows that the registration time of ONU and the polling period in uplink bandwidth allocation have great influence on the data transmission delay. Considering the QoS quality of EPON multi-service transmission, we also discuss the impact of 802.1p, 802.1Q protocol and priority-based scheduling algorithm on the transmission delay of EPON. The research results show that EPON network can be used to construct digital substation communication network. EPON network structure meets the requirements of digital substation communication network topology. By analyzing and comparing the advantages and disadvantages of the two networking modes, and comparing the advantages and disadvantages of star topology and ring topology, and considering the characteristics of EPON network structure and the future development direction of digital substation, the substation communication network is proposed. The VLAN is divided into SV network and GOOSE network according to the star topology. Because the public network EPON system can not meet the requirements of IEC61850, the EPON is improved according to the application environment of short-distance communication in digital substation. The main methods are to limit RTT time and the maximum authorized bandwidth of ONU by OLT. Shorten the polling period of IPACT algorithm, and then turn off the discovery process in EPON system based on IPACT algorithm to further shorten the transmission delay between ONU and ONU to the transmission requirements of SV and GOOSE messages. Transmission requirements of network and GOOSE network.
【學(xué)位授予單位】：南京理工大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2014
【分類號(hào)】：TM63;TM73
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本文編號(hào)：2243420