本文選題：微電網(wǎng)　切入點(diǎn)：繼電保護(hù)　出處：《燕山大學(xué)》2014年碩士論文

【摘要】：負(fù)荷的持續(xù)增長(zhǎng)、能源問(wèn)題、環(huán)保問(wèn)題以及用戶電能質(zhì)量的高要求，成為世界各國(guó)電力工業(yè)共同面臨的嚴(yán)峻挑戰(zhàn)。微電網(wǎng)具有靈活、智能的特點(diǎn)，可以降低饋線損耗、增加本地供電可靠性、提高能源利用的效率，在解決上述問(wèn)題上具有極大優(yōu)勢(shì)。但是，微電網(wǎng)的結(jié)構(gòu)特征對(duì)繼電保護(hù)提出了新的挑戰(zhàn)。微電網(wǎng)中分布式電源種類繁多、儲(chǔ)能裝置形式多樣，使得微電網(wǎng)不同運(yùn)行方式、不同線路上故障電流分布差異很大，尤其是并網(wǎng)和孤島兩種模式下故障電流相差懸殊。微電網(wǎng)用戶端發(fā)電設(shè)備即插即用，并網(wǎng)模式與孤島模式隨機(jī)切換，使得微電網(wǎng)拓?fù)浣Y(jié)構(gòu)靈活多變。這些都要求保護(hù)系統(tǒng)能夠相應(yīng)地做出調(diào)整以滿足微電網(wǎng)的變化。 為滿足微電網(wǎng)對(duì)保護(hù)系統(tǒng)自治性和自適應(yīng)性的要求，本文在分析分布式電源及微電網(wǎng)故障特性的基礎(chǔ)上，提出了一種主從結(jié)構(gòu)、面向區(qū)域信息集中決策的微電網(wǎng)自適應(yīng)保護(hù)系統(tǒng)架構(gòu)。該系統(tǒng)采用基于本地信息的主保護(hù)和基于區(qū)域信息的后備保護(hù)方法，，由微電網(wǎng)中央保護(hù)決策單元和本地保護(hù)測(cè)控單元構(gòu)成。中央保護(hù)決策單元從本地保護(hù)測(cè)控單元收集微電網(wǎng)全局信息，根據(jù)微電網(wǎng)運(yùn)行狀態(tài)實(shí)時(shí)做出決策，調(diào)整本地保護(hù)方案并承擔(dān)后備保護(hù)。 此外，本文還應(yīng)用多代理技術(shù)設(shè)計(jì)了微電網(wǎng)自適應(yīng)保護(hù)多代理系統(tǒng)，為微電網(wǎng)保護(hù)系統(tǒng)提供高智能的軟件體系結(jié)構(gòu)。詳細(xì)設(shè)計(jì)了系統(tǒng)中各代理的任務(wù)劃分和主保護(hù)自適應(yīng)整定、后備保護(hù)在線實(shí)施的代理協(xié)作過(guò)程�；诘湫臀㈦娋W(wǎng)結(jié)構(gòu)描述了微電網(wǎng)自適應(yīng)保護(hù)多代理系統(tǒng)的工作流程，表明該系統(tǒng)可根據(jù)微電網(wǎng)運(yùn)行模式動(dòng)態(tài)在線制定保護(hù)策略，合理解決并網(wǎng)、孤島模式的保護(hù)協(xié)調(diào)問(wèn)題和主保護(hù)、后備保護(hù)的配合問(wèn)題。
[Abstract]:The continuous growth of load, energy problems, environmental protection problems and the high requirements of power quality for users have become the severe challenges facing the power industry in the world. Microgrid has the characteristics of flexibility and intelligence, which can reduce the feeder loss. Increasing the reliability of local power supply and improving the efficiency of energy utilization have great advantages in solving the above problems. However, the structural characteristics of microgrid pose a new challenge to relay protection. Because of the variety of energy storage devices, the distribution of fault current on different lines varies greatly with different operation modes of microgrid, especially the difference of fault current between grid-connected and isolated island mode. Due to random switching between grid-connected mode and islanding mode, the topology of microgrid is flexible and changeable, which requires that the protection system can be adjusted accordingly to meet the change of microgrid. In order to meet the requirement of autonomous and adaptive protection system in microgrid, this paper presents a master-slave structure based on the analysis of the fault characteristics of distributed generation and microgrid. The architecture of adaptive protection system of microgrid for regional information centralized decision is presented, which adopts local information based primary protection and regional information based backup protection. It is composed of central protection decision-making unit and local protection measurement and control unit. The central protection decision-making unit collects global information from local protection and measurement and control unit, and makes real-time decision according to the operation state of microgrid. Adjust local protection programs and assume backup protection. In addition, an adaptive protection multi-agent system for microgrid is designed by using multi-agent technology. To provide a high intelligent software architecture for microgrid protection system, the task partition of each agent and the adaptive setting of main protection in the system are designed in detail. Based on typical microgrid structure, the workflow of microgrid adaptive protection multi-agent system is described, which indicates that the system can dynamically formulate protection strategy according to microgrid operation mode. Reasonable solution to the problems of grid connection, islanding protection coordination, main protection and backup protection.
【學(xué)位授予單位】：燕山大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2014
【分類號(hào)】：TM727

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