本文選題：配用電　切入點(diǎn)：MESH　出處：《華北電力大學(xué)(北京)》2014年碩士論文　論文類型：學(xué)位論文

【摘要】：由于電力系統(tǒng)配用電通信節(jié)點(diǎn)數(shù)量多,分布分散,地理環(huán)境惡劣,而且通信技術(shù)種類多,傳輸速率非常低,遠(yuǎn)遠(yuǎn)不能滿足日益豐富的配用電業(yè)務(wù)需求,逐漸成為制約智能電網(wǎng)發(fā)展的瓶頸。為了改善配用電接入網(wǎng)絡(luò)環(huán)境,本文從基于MESH的配用電通信網(wǎng)絡(luò)拓?fù)浣Y(jié)構(gòu)、基于層次分析法的配用電業(yè)務(wù)建模和基于配用電業(yè)務(wù)模型穩(wěn)定性的跨層資源分配三個(gè)方面分別對(duì)配用電接入網(wǎng)性能進(jìn)行改善。本文首先對(duì)現(xiàn)有配用電通信網(wǎng)和WMN現(xiàn)狀進(jìn)行簡單的介紹；然后結(jié)合現(xiàn)有配用電通信網(wǎng)拓?fù)浣Y(jié)構(gòu),提出一種基于MESH網(wǎng)的配用電通信結(jié)構(gòu),該種網(wǎng)絡(luò)結(jié)構(gòu)可以根據(jù)具體的數(shù)據(jù)傳輸環(huán)境和電力系統(tǒng)業(yè)務(wù)需求采用合適的有線或者無線接入方式,可以在滿足電力業(yè)務(wù)需求的前提下大大減少了配用電網(wǎng)絡(luò)的建設(shè)成本。然后,針對(duì)配用電網(wǎng)絡(luò)業(yè)務(wù)種類多,各種業(yè)務(wù)對(duì)網(wǎng)絡(luò)的需求差異,本文從流量、可靠性、實(shí)時(shí)性三方面對(duì)配用電業(yè)務(wù)進(jìn)行分析,并結(jié)合層次分析法最后對(duì)每種業(yè)務(wù)都計(jì)算出一個(gè)全局的權(quán)值,根據(jù)權(quán)值對(duì)不同業(yè)務(wù)進(jìn)行分類排序,并進(jìn)行相應(yīng)的資源分配,從而滿足不同業(yè)務(wù)傳輸要求,并提高配用電業(yè)務(wù)的通信實(shí)時(shí)性、可靠性和安全性,減少網(wǎng)絡(luò)擁塞和丟包率,有利于實(shí)現(xiàn)配用電高速、實(shí)時(shí)、雙向的數(shù)據(jù)采集、保護(hù)和控制業(yè)務(wù)。最后,針對(duì)配用電通信環(huán)境復(fù)雜,通信信道具有多徑、衰落、時(shí)變或者頻率選擇性等特點(diǎn),本文結(jié)合調(diào)度策略和資源分配,綜合考慮上層業(yè)務(wù)的動(dòng)態(tài)特征和物理層的信道特性,實(shí)現(xiàn)跨層的信息交換。從而確定各個(gè)用戶待傳輸?shù)臄?shù)據(jù)量和資源分配方式。并提出一種控制實(shí)時(shí)業(yè)務(wù)抖動(dòng)率和盡可能保障非實(shí)時(shí)業(yè)務(wù)穩(wěn)定性的資源分配算法,其中核心是一種基于業(yè)務(wù)抖動(dòng)的調(diào)度策略綜合考慮業(yè)務(wù)到達(dá)模型和物理層可發(fā)送數(shù)據(jù)包數(shù)。根據(jù)調(diào)度策略,該調(diào)度策略對(duì)優(yōu)先級(jí)高的實(shí)時(shí)業(yè)務(wù)優(yōu)先分配資源,如果系統(tǒng)資源還有剩余,則根據(jù)非實(shí)時(shí)業(yè)務(wù)緊急度權(quán)重依次分配；而在物理層采用等功率資源分配策略,盡可能將信道好的子載波分配給業(yè)務(wù),從而實(shí)現(xiàn)系統(tǒng)速率最大化的目的。在典型電力線信道環(huán)境下進(jìn)行仿真和分析,結(jié)果表明本文資源分配算法在系統(tǒng)總吞吐量變化不大的前提下,可以保證實(shí)時(shí)業(yè)務(wù)的抖動(dòng)性和非實(shí)時(shí)業(yè)務(wù)的穩(wěn)定性,而且可以總體改善所有業(yè)務(wù)的整體性能,非常適合電力線通信系統(tǒng)。
[Abstract]:Because of the large number of distribution communication nodes, scattered distribution, bad geographical environment, and the variety of communication technology, the transmission rate is very low, which can not meet the increasing demand of distribution service. In order to improve the distribution and power access network environment, this paper starts with the topology structure of distribution communication network based on MESH. The performance of distribution access network is improved from three aspects: the modeling of distribution service based on analytic hierarchy process and the cross-layer resource allocation based on stability of distribution service model. Firstly, the existing distribution communication network and WMN are introduced in this paper. The current situation is briefly introduced; Then, combining with the existing topology of distribution communication network, a communication structure based on MESH network is proposed. This kind of network structure can adopt appropriate wired or wireless access mode according to the specific data transmission environment and power system business requirements. The construction cost of distribution network can be greatly reduced under the premise of satisfying the demand of electric power service. Then, in view of the variety of distribution network services and the difference in demand for various services to the network, this paper focuses on the flow, reliability, and reliability of the distribution network. In this paper, the distribution service is analyzed in three aspects of real time, and a global weight is calculated for each service by AHP, and the different services are classified and sorted according to the weights, and the corresponding resources are allocated. In order to meet the requirements of different service transmission, and improve the communication real-time, reliability and security of distribution service, reduce network congestion and packet loss rate, it is beneficial to achieve high-speed, real-time, two-way data acquisition. Finally, in view of the complex communication environment and the characteristics of multipath, fading, time-varying or frequency selectivity, this paper combines scheduling strategy and resource allocation. Considering the dynamic characteristics of the upper layer services and the channel characteristics of the physical layer, In order to determine the amount of data and resource allocation to be transmitted by each user, a resource allocation algorithm is proposed to control the jitter rate of real-time services and ensure the stability of non-real-time services as much as possible. The core of the strategy is a scheduling strategy based on service jitter which considers the number of packets sent by the physical layer and the service arrival model. According to the scheduling policy, the scheduling strategy allocates resources to the high-priority real-time services first. If the system resource is still surplus, it is allocated according to the non-real-time service emergency weight in turn; and the equal-power resource allocation strategy is adopted in the physical layer, and the subcarriers with good channel are allocated to the service as far as possible. The simulation and analysis in typical power line channel environment show that the resource allocation algorithm in this paper has little change in the total throughput of the system. It can ensure the jitter of real-time services and the stability of non-real-time services, and can improve the overall performance of all services, which is very suitable for power line communication systems.
【學(xué)位授予單位】：華北電力大學(xué)(北京)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2014
【分類號(hào)】：TM73

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