本文選題：海島微電網 + 直流微電網��； 參考：《山東建筑大學》2017年碩士論文

【摘要】：近年來,化石能源危機日益嚴重,傳統(tǒng)火力發(fā)電將面臨資源枯竭的考驗,同時火力發(fā)電排放大量二氧化碳,帶來了嚴重的環(huán)境問題。同時,大電網在本世紀初發(fā)生了幾次大規(guī)模停電事件,暴漏了大電網運行維護難度大,難以滿足用戶日益增長的用電質量需求等缺點。大電網在軍事上也易成為攻擊目標,一旦被攻擊,造成電力系統(tǒng)停電,依賴電力的設施將全部癱瘓。微電網的提出為解決這些問題提供了新的思路。微電網整合分布式電源、儲能單元,協(xié)調控制成為一個自治系統(tǒng),既可以與大電網進行能量交換,也可以獨立運行為系統(tǒng)內負荷提供電能。開展微電網技術方面研究,迫切需要以實際工程為依托�；诖�,本課題著手設計一個海島微電網系統(tǒng)。首先,對海島微電網進行整體方案設計。介紹了海島微電網的目前供用電情況,并對供電需求進行了分析,分別比較交流微電網方案與直流微電網方案在項目實施地點的優(yōu)劣。分析了含混合儲能的直流微電網在本項目中的優(yōu)勢,并對海島微電網內設備進行選型,確定了海島微電網的整體設計方案。其次,對微電網內變流器的設計。變流器是微電網控制實現(xiàn)的關鍵設備,本文將課題內五臺變流器分為三種類型,分別從拓撲結構設計、內部主要元件選型方面對這三種類型的變流器進行設計,介紹了變流器控制模塊的結構,并給出了變流器的控制模塊檢測與驅動的實現(xiàn)方法。再次,針對海島微電網內分布式發(fā)電單元與混合儲能的協(xié)調控制問題,提出一種基于直流母線電壓分層協(xié)調控制策略,分別闡述了運行在這種控制方法下的各變流器控制模式的實現(xiàn)方法。隨后,搭建了基于昆侖通態(tài)(MCGS)組態(tài)軟件的海島微電網監(jiān)控系統(tǒng)。不僅實現(xiàn)了數據顯示、曲線與報表輸出、故障記錄等功能,還將上述協(xié)調控制方法嵌入監(jiān)控系統(tǒng)中,實現(xiàn)了海島微電網的智能化無人值守。最后,進行系統(tǒng)實驗。分別觀測離網模式下系統(tǒng)抗擾動能力、并離網切換時系統(tǒng)輸出曲線的波動。實驗結果表明,系統(tǒng)能夠穩(wěn)定運行。
[Abstract]:In recent years, the crisis of fossil energy is becoming more and more serious. Traditional thermal power generation will face the test of resource depletion. Meanwhile, thermal power generation emissions a lot of carbon dioxide, which brings serious environmental problems. At the same time, several large-scale power outages occurred at the beginning of this century, which made the operation and maintenance of large power grid difficult to meet the increasing demand for power quality. Large power grids are also easy to be targeted militarily. Once attacked, the power system will be cut off and all the facilities that rely on electricity will be paralyzed. The microgrid provides a new way to solve these problems. Microgrid integrates distributed power generation, energy storage unit and coordinated control into an autonomous system, which can exchange energy with large power grid and provide power for system load independently. Research on microgrid technology is urgently needed to rely on practical engineering. Based on this, this subject begins to design an island microgrid system. Firstly, the overall scheme design of island microgrid is carried out. This paper introduces the current situation of power supply and demand of island microgrid, and analyzes the demand of power supply, and compares the advantages and disadvantages of AC microgrid scheme and DC microgrid scheme in the project implementation location respectively. The advantages of DC microgrid with mixed energy storage in this project are analyzed, and the equipment selection in island microgrid is selected, and the overall design scheme of island microgrid is determined. Secondly, the design of the converter in the microgrid. The converter is the key equipment of microgrid control. In this paper, five converters in the subject are divided into three types. The three types of converters are designed from the aspects of topology design and selection of internal main components. The structure of the converter control module is introduced, and the method of detecting and driving the converter control module is given. Thirdly, aiming at the problem of coordinated control between distributed generation unit and hybrid energy storage in island microgrid, a hierarchical coordinated control strategy based on DC bus voltage is proposed. The realization methods of each converter control mode running under this control method are described respectively. Then, an island microgrid monitoring system based on Kunlun on-state MCGS configuration software is built. Not only the functions of data display, curve and report output, fault record and so on are realized, but also the coordination and control methods mentioned above are embedded in the monitoring system, and the intelligent and unattended island microgrid is realized. Finally, the system experiment is carried out. The anti-disturbance ability of the system in off-grid mode and the fluctuation of the output curve of the system in off-grid switching are observed respectively. The experimental results show that the system can run stably.
【學位授予單位】：山東建筑大學
【學位級別】：碩士
【學位授予年份】：2017
【分類號】：TM727

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