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  本文關鍵詞： 小電流接地系統(tǒng) 單相接地故障 故障定位 MATLAB仿真　出處：《華北電力大學》2015年碩士論文　論文類型：學位論文

【摘要】：隨著人們對能源和環(huán)境問題的日益關注,推動能源結(jié)構(gòu)調(diào)整、促進節(jié)能減排以及提高能源綜合利用率已經(jīng)成為我國能源產(chǎn)業(yè),尤其是電力工業(yè)發(fā)展的重要方向。分布式電源主要利用可再生能源發(fā)電,作為對集中式發(fā)電的有效補充,有助于向用戶提供低碳、高效的“綠色電力”,對于促進電力工業(yè)向智能化、清潔化方向發(fā)展具有重要作用。微網(wǎng)作為一種整合利用分布式電源的有效形式,能夠通過靈活的控制技術實現(xiàn)可再生能源的充分利用,提高供電質(zhì)量和可靠性,近年來已經(jīng)成為業(yè)內(nèi)的研究熱點。但是,隨著分布式電源的大量接入,微網(wǎng)的分布式特性將越來越明顯,滲透率也逐漸提高,因此,在高滲透率情況下如何有效的實現(xiàn)多個微網(wǎng)與配電網(wǎng)的協(xié)調(diào)運行成為亟待解決的問題。本文關注含多微網(wǎng)的配電網(wǎng)的協(xié)調(diào)運行機制,通過對微網(wǎng)和配電網(wǎng)調(diào)度目標的分析比較,基于多Agent技術建立了包含元件級、微網(wǎng)級和配電網(wǎng)級的分層協(xié)調(diào)控制結(jié)構(gòu),將調(diào)度決策過程分為微網(wǎng)級Agent能量管理過程和配電網(wǎng)級Agent協(xié)調(diào)調(diào)度過程,建立了相關數(shù)學模型,利用遺傳算法給出模型求解方法,最后,基于IEEE標準30節(jié)點算例系統(tǒng)對所提出模型進行了驗證,對結(jié)果從調(diào)度策略、電壓水平和有功網(wǎng)損三個方面進行了討論。算例結(jié)果表明,本文所提出的分層協(xié)調(diào)控制模型在不損害微網(wǎng)的自治性的前提下,可以控制多個微網(wǎng)達到降低配電網(wǎng)峰值負荷,提高配電網(wǎng)電壓水平和降低配電網(wǎng)運行的有功網(wǎng)損的作用。本文所提出的分層協(xié)調(diào)控制機制也可以為未來配電網(wǎng)與微網(wǎng)的互動運行提供參考。
[Abstract]:As people pay more and more attention to energy and environment problems, promoting energy structure adjustment, promoting energy saving and emission reduction and improving energy utilization efficiency have become the energy industry of our country. In particular, the important direction of the development of power industry. Distributed power generation mainly uses renewable energy to generate electricity, as an effective supplement to centralized power generation, which is helpful to provide low carbon and efficient "green power" to users. It plays an important role in promoting the development of power industry towards intelligence and cleanness. Microgrid is an effective form of integrating and utilizing distributed power supply. It has become a research hotspot in recent years to realize the full use of renewable energy and improve the quality and reliability of power supply through flexible control technology. However, with the large number of access to distributed power. The distributed characteristics of the microgrid will become more and more obvious and the permeability will increase gradually. In the case of high permeability, how to effectively realize the coordinated operation of multiple microgrids and distribution networks has become an urgent problem to be solved. This paper focuses on the coordinated operation mechanism of distribution networks with multi-microgrids. Based on the analysis and comparison of the dispatch targets of microgrid and distribution network, a hierarchical coordinated control structure including component level, microgrid level and distribution network level is established based on multi-#en0# technology. The dispatching decision-making process is divided into microgrid-level Agent energy management process and distribution network-level Agent coordinated dispatching process. The relevant mathematical models are established and the genetic algorithm is used to solve the model. Finally. The proposed model is verified based on the IEEE standard 30-bus system, and the results are discussed from three aspects: scheduling strategy, voltage level and active power loss. The hierarchical coordinated control model proposed in this paper can control multiple microgrids to reduce the peak load of distribution network without harming the autonomy of microgrid. The hierarchical coordinated control mechanism proposed in this paper can also provide a reference for the interaction between distribution network and microgrid in the future.
【學位授予單位】：華北電力大學
【學位級別】：碩士
【學位授予年份】：2015
【分類號】：TM862

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本文編號：1473275