本文選題：供電恢復(fù)　切入點(diǎn)：微電網(wǎng)　出處：《重慶大學(xué)》2014年碩士論文　論文類型：學(xué)位論文

【摘要】：可靠持續(xù)地供電是電力系統(tǒng)運(yùn)行的基本要求之一，，但量大面廣的配電網(wǎng)在實(shí)際運(yùn)行中難以避免故障發(fā)生。故障發(fā)生后，應(yīng)準(zhǔn)確定位故障，快速隔離故障，及時(shí)供電恢復(fù)。其中，供電恢復(fù)的主要目標(biāo)是指在不違背操作約束和安全約束的條件下，通過網(wǎng)絡(luò)重構(gòu)技術(shù)將非故障停電區(qū)的負(fù)荷盡可能多地轉(zhuǎn)移到正常饋線。有效的供電恢復(fù)能減少因故障造成的停電區(qū)域和縮短用戶的停電時(shí)間，減少用戶的停電損失和增加供電公司的售電量。因此，研究有效的配電網(wǎng)供電恢復(fù)方法，對(duì)提高配電網(wǎng)供電運(yùn)行的安全性和可靠性具有十分重要的意義。在研究當(dāng)前國內(nèi)外配電網(wǎng)供電恢復(fù)模型和方法的基礎(chǔ)上，本文主要從以下幾個(gè)方面開展研究工作： ①從負(fù)荷模型的角度看，本文針對(duì)現(xiàn)有負(fù)荷模型在制定配電網(wǎng)供電恢復(fù)方案時(shí)所存在的不足，提出了一種基于負(fù)荷曲線的配電網(wǎng)動(dòng)態(tài)供電恢復(fù)方法。該方法在制定恢復(fù)方案時(shí)，基于負(fù)荷曲線按小時(shí)考慮負(fù)荷大小的變化，以失負(fù)荷量最少為目標(biāo)，支路電流,節(jié)點(diǎn)電壓以及輻射狀運(yùn)行為安全約束為條件，優(yōu)選配電網(wǎng)故障修復(fù)期間各小時(shí)的網(wǎng)架結(jié)構(gòu)形成候選網(wǎng)架集合，進(jìn)而得到故障修復(fù)期間能隨負(fù)荷變化而改變，同時(shí)使開關(guān)動(dòng)作次數(shù)最少的動(dòng)態(tài)供電恢復(fù)方案。該方法具有時(shí)間空間動(dòng)態(tài)特性，能充分利用負(fù)荷曲線，進(jìn)一步有效減少因故障造成的停電區(qū)域、縮短用戶停電時(shí)間、減小用戶停電損失和增加電力公司售電量。 ②結(jié)合配電網(wǎng)發(fā)展趨勢(shì)，探討了配電網(wǎng)動(dòng)態(tài)供電恢復(fù)方法在含微電網(wǎng)配電網(wǎng)中的應(yīng)用，針對(duì)故障發(fā)生后備用饋線含微電網(wǎng)的情況，提出了一種考慮開關(guān)動(dòng)作次數(shù)的含微電網(wǎng)配電網(wǎng)動(dòng)態(tài)供電恢復(fù)方法。該方法在時(shí)間層面上按小時(shí)進(jìn)行分割，在結(jié)合考慮負(fù)荷變化特性的同時(shí)，為故障修復(fù)期間各小時(shí)建立兼顧開關(guān)動(dòng)作次數(shù)和失負(fù)荷量的多目標(biāo)多約束數(shù)學(xué)模型，通過求解故障修復(fù)期間各小時(shí)對(duì)應(yīng)的數(shù)學(xué)模型，得到各小時(shí)的網(wǎng)架結(jié)構(gòu)，進(jìn)而形成候選網(wǎng)架集合，再根據(jù)失負(fù)荷量和開關(guān)動(dòng)作次數(shù)的重要程度量化關(guān)系，得到排序后的多個(gè)動(dòng)態(tài)供電恢復(fù)方案，以便工作人員根據(jù)實(shí)際情況進(jìn)行選擇。同時(shí)，該方法通過調(diào)整微電網(wǎng)內(nèi)可調(diào)度分布式電源出力使其滿發(fā)，增大備用饋線的余量，從而擴(kuò)大供電恢復(fù)面積，縮短用戶停電時(shí)間。 ③未來的智能配電網(wǎng)將電力網(wǎng)和通信網(wǎng)緊密相連，在電力傳輸?shù)耐瑫r(shí)具有信息交互的能力。本文針對(duì)現(xiàn)有配電自動(dòng)化集中控制在供電恢復(fù)問題中的不足，建立了一種分布式分層結(jié)構(gòu)的多代理系統(tǒng)，該多代理系統(tǒng)由饋線代理、開關(guān)代理、微電網(wǎng)代理以及分布式電源代理組成，通過代理間的相互通信及時(shí)更新用于供電恢復(fù)的網(wǎng)絡(luò)數(shù)據(jù)，確保了制定的供電恢復(fù)方案安全最優(yōu)；同時(shí)，通過代理間的相互合作共同制定并實(shí)現(xiàn)了動(dòng)態(tài)供電恢復(fù)過程。本文建立的多代理系統(tǒng)可以充分利用通信網(wǎng)絡(luò)和配電網(wǎng)的分布式特性減少人工參與，智能化實(shí)施安全可靠的最優(yōu)動(dòng)態(tài)供電恢復(fù)方案，提高了配電自動(dòng)化智能水平。 ④采用70節(jié)點(diǎn)的網(wǎng)絡(luò)作為算例驗(yàn)證了上述方法的可行性和有效性。其中①和②在Matlab編程環(huán)境實(shí)現(xiàn)，③在JADE平臺(tái)上采用Java-Matlab混合編程方法實(shí)現(xiàn)。
[Abstract]:Reliable power supply continuously is the basic requirement of power system operation of distribution network, but a large amount of wide in the actual operation is difficult to avoid failure. After the failure, should be accurate fault location, fast fault isolation, timely recovery of power supply. The main goal of restoration is in does not violate the operation and security constraints under the condition, through the network reconfiguration technology will be the non fault zone load as much as possible transfer to normal feeders. Effective restoration can reduce the outage area caused by faults and shorten the user outage time, reduce user outage loss and increase the power company electricity sales. Therefore, the study of effective power distribution net recovery method, has very important significance to improve the safety and reliability of power supply operation of distribution network. Based on the research at home and abroad, the current power supply distribution network restoration model and method on In this paper, the main research work is to be carried out in the following aspects:
From the angle of load model, aiming at the existing problem formulated in the load model of distribution network power supply restoration scheme exists, proposed a dynamic recovery method based on power load curve. The method in the formulation of restoration scheme, when considering the variation of load curve according to the small load based on the loss of load minimum volume as the target, the branch current, node voltage and radial transport behavior safety constraint condition, optimization of distribution network fault restoration during each hour of the formation of network structure and network candidate set, during the repair of the fault can vary with the change of load and the dynamic power supply minimum switch recovery scheme. This method is dynamic the characteristics of time and space, can make full use of the load curve, and further reduce the outage area caused by failure, shorten the outage time, reduce the loss of power outages And increase the sale of electricity power company.
Based on the development trend of distribution network, discusses the dynamic power recovery method in the application of micro grid in the distribution network, aiming at the failure of backup feeders containing micro grid, this paper presents a micro dynamic power grid distribution network restoration method with switch times are considered. The method in time according to the level of hour segmentation, in combination with the load change characteristics at the same time, the establishment of both switch and failure load of multi-objective and multi constraint mathematical model for fault repair during the hour, every hour during the repair of solving mathematical model, obtain the grid structure of each hour, and then form the candidate frame according to the set. The importance of quantitative load and switching loss frequency relationship, get a number of dynamic power supply after sorting recovery program, so that workers choose according to the actual situation. This method can make full use of the dispatch of distributed power in microgrid, increase the allowance of spare feeder, expand the area of power supply recovery and shorten the time of user power failure.
The future of the intelligent distribution network of power network and communication network is closely linked with the ability of information interaction in power transmission and distribution automation. Aiming at the existing problems in the centralized control of power supply restoration in a multi-agent system, a distributed hierarchical structure, the multi agent system is composed of feeder switch agent, agent the micro grid and distributed power supply agency, through mutual communication between agents to update the network for data restoration, to ensure that the formulation of the restoration scheme is safe and optimal; at the same time, through mutual cooperation between agents to develop and realize the dynamic power recovery process. Multi agent system is established in this paper can fully utilize the characteristics of distributed communication network and distribution network to reduce the artificial participation, the implementation of intelligent recovery scheme of optimal dynamic safe and reliable power supply, improve the distribution of self The level of dynamic intelligence.
Fourth, a 70 node network is used as an example to verify the feasibility and effectiveness of the above methods. 1. And II are implemented in the Matlab programming environment. On the JADE platform, Java-Matlab mixed programming is applied.

【學(xué)位授予單位】：重慶大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2014
【分類號(hào)】：TM732

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本文編號(hào)：1572421