本文選題：配電系統 + 可靠性評估��； 參考：《華北電力大學》2017年碩士論文

【摘要】：配電系統拓撲復雜、元件維數較高,其供電可靠性的高低與用戶息息相關。不斷提高配電系統的供電可靠性是當前電力系統一直努力的方向。作為智能電網的基礎,配電自動化開關具有動作迅速、準確度高等優(yōu)點,近年來在配電系統中得到了廣泛的應用。與此同時,分布式電源憑借其環(huán)保清潔、運用靈活等優(yōu)點,也越來越多地接入到配電系統。分布式電源接入并實現配電自動化后,配電系統可靠性評估的模型、方法和指標與傳統的可靠性評估均存在較大的差別,因而有必要對接入后的配電系統進行建模,并提出新的可靠性評估算法。本文分別實現了考慮配電自動化與含分布式電源的配電系統可靠性評估。與傳統的手動開關相比,配電自動化開關具有良好的動作特性,開斷操作甚至可在幾秒內完成;但動作過程可能會導致負荷點經歷瞬時停電,而傳統配電系統可靠性評估的研究并未過多考慮瞬時停電事件。針對這方面的不足,本文將配電自動化開關在故障恢復過程中的動作時序進行分析后,引入了瞬時停電頻率指標。同時考慮到含多聯絡及多分段開關配電系統供電恢復路徑的多樣化,對供電恢復過程進行建模,采用改進遺傳算法實現了故障重構;根據得到的最優(yōu)重構方案,基于故障模式后果分析法實現可靠性評估。針對分布式電源接入后配電系統的可靠性評估,本文首先建立風電機組和光伏電源的出力模型,然后分別從是否可作主電源的備用和是否與主電源存在通路兩方面對分布式電源進行了分類,并從故障恢復的角度構建含不同類型DG的故障重構方案;最后根據得到的方案,采用序貫蒙特卡洛模擬算法實現含分布式電源的配電系統可靠性評估。
[Abstract]:The topology of distribution system is complex and the dimension of components is high. The reliability of power supply is closely related to the users. Improving power supply reliability of distribution system is the direction of current power system. As the basis of smart grid, distribution automation switch has been widely used in distribution system in recent years because of its advantages of quick operation and high accuracy. At the same time, distributed power supply (DG) is more and more connected to distribution system because of its environmental protection and cleanness and flexibility. After the distributed power supply is connected and the distribution automation is realized, the reliability evaluation model, method and index of the distribution system are different from the traditional reliability evaluation, so it is necessary to model the distribution system after the access. A new reliability evaluation algorithm is proposed. In this paper, the reliability evaluation of distribution system including distribution automation and distributed generation is realized. Compared with the traditional manual switch, the distribution automation switch has good operation characteristics, and the on-off operation can be completed in a few seconds, but the operation process may lead to the transient blackout at the load point. However, the traditional research on reliability evaluation of distribution systems does not take transient power outages into account. In view of this deficiency, this paper introduces the instantaneous power outage frequency index after analyzing the operation time sequence of distribution automation switch in the process of fault recovery. At the same time, considering the diversification of power supply recovery paths in multi-connection and multi-segment switching distribution systems, the power supply recovery process is modeled, and the fault reconstruction is realized by using improved genetic algorithm. Reliability evaluation is realized based on fault mode consequence analysis method. In order to evaluate the reliability of distribution system after distributed power supply is connected, this paper first establishes the model of wind turbine and photovoltaic power supply. Then it classifies the distributed power supply from the aspects of whether it can be used as the backup of the main power supply and the existence path of the main power supply, and constructs the fault reconstruction scheme with different types of DG from the point of view of fault recovery; finally, according to the obtained scheme, The sequential Monte Carlo simulation algorithm is used to evaluate the reliability of distribution system with distributed power supply.
【學位授予單位】：華北電力大學
【學位級別】：碩士
【學位授予年份】：2017
【分類號】：TM732

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本文編號：2054676