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  本文關鍵詞：計及風險的城市中壓配電網規(guī)劃決策　出處：《東北電力大學》2017年碩士論文　論文類型：學位論文

  更多相關文章： 城市中壓配電網 可靠性評估 風險評估 接線方式 規(guī)劃決策

【摘要】：城市中壓配電網是國民經濟和社會發(fā)展的重要公共基礎設施,作為電力系統(tǒng)的末端環(huán)節(jié),承擔著直接向用戶提供電能的任務,因此,合理的規(guī)劃城市中壓配電網是其為用戶提供優(yōu)質電能的有力保障。目前,在城市中壓配電網規(guī)劃領域,關注的焦點在于規(guī)劃方法和規(guī)劃方案的選擇,而對于規(guī)劃方案的優(yōu)劣沒有比較全面的衡量標準。本文以我國東北某城市經濟技術開發(fā)區(qū)中壓配電網規(guī)劃項目為基礎,研究了在已知供電可靠性統(tǒng)計數據下的規(guī)劃區(qū)規(guī)劃優(yōu)先級確定問題、中壓配電網接線方式的選擇和綜合評估問題以及電網規(guī)劃方案的評估決策問題。針對東北某城市經濟技術開發(fā)區(qū)配電網規(guī)劃優(yōu)先級的確定問題,以供電可靠性統(tǒng)計數據為基礎,將規(guī)劃區(qū)依據變電站主變互聯關系劃分為多個獨立的供電分區(qū),通過基于主成分分析的供電可靠性評估模型對多個供電分區(qū)進行可靠性評估,依據評估結果得到各供電分區(qū)的規(guī)劃優(yōu)先級;通過繪制各供電分區(qū)的指標滿意度及重要性區(qū)域圖,為配電網規(guī)劃提供了理論依據。針對經開區(qū)配電網規(guī)劃優(yōu)先級的工程實例分析,驗證了方法的有效性�；�于滿足中壓配電網網架安全性的基本要求,依據基元接線理論建立了中壓配電網接線方式選擇模型和規(guī)則庫,并基于模型和規(guī)則庫在Visual Studio 2010工具平臺上開發(fā)了中壓配電網接線方式選擇軟件;依據規(guī)劃區(qū)內邊界條件確定基元變量,通過軟件參數設置得到接線方式;為綜合評估接線方式,從風險性、可靠性和經濟性考慮構建接線方式綜合評估指標體系,引入模糊隸屬度函數量綱化各指標值,得到待評估接線方式的綜合評分進而選出最優(yōu)接線方式。最后,以經開區(qū)供電區(qū)域內接線方式選擇的實例分析證明了方法的合理性。以中壓配電網規(guī)劃的目的為導向,從網架風險性、電網整體協調性、供電可靠性和經濟性的角度考慮構建了規(guī)劃電網方案綜合評估指標體系;為了對規(guī)劃電網的風險水平進行準確評估,引入了一種考慮網架結構缺陷帶來潛在風險的配電網風險評估方法,通過建立網架風險指標體系,并結合風險量化值的計算及風險等級的劃分確定規(guī)劃電網的綜合風險水平;基于配電網協調配合性的規(guī)劃要求,從容載比合理度和負載均衡度兩個方面對規(guī)劃電網進行協調性評估。最后給出規(guī)劃電網評估的具體實施步驟,以經開區(qū)某規(guī)劃區(qū)域內的兩個規(guī)劃方案的工程實例分析驗證了方法的有效性,對規(guī)劃電網的評估決策具有指導意義。
[Abstract]:Urban medium voltage distribution network is an important public infrastructure for national economy and social development. As the terminal link of power system, it undertakes the task of providing electricity directly to users. Reasonable planning of urban medium voltage distribution network is the effective guarantee to provide high quality power to users. At present, in the field of urban medium voltage distribution network planning, the focus is on the choice of planning methods and planning schemes. However, there is no comprehensive measurement standard for the planning scheme. This paper is based on the mid-voltage distribution network planning project of a city economic and technological development zone in Northeast China. In this paper, the problem of determining the priority of the planning area under the known statistical data of power supply reliability is studied. The selection and comprehensive evaluation of the medium voltage distribution network connection mode and the evaluation decision of the power network planning scheme are discussed. The priority of the distribution network planning in a city economic and technological development zone in Northeast China is determined. Based on the statistical data of power supply reliability, the planning area is divided into several independent power supply zones according to the interconnection relationship of substation main transformer. The reliability evaluation model of power supply based on principal component analysis (PCA) is used to evaluate the reliability of multiple power supply zones, and according to the evaluation results, the planning priorities of each power supply zone are obtained. This paper provides a theoretical basis for distribution network planning by drawing the index satisfaction degree and importance area diagram of each power supply district, and analyzes the engineering example of priority of distribution network planning in open area. The validity of the method is verified. Based on the basic requirements of security of medium voltage distribution network, the selection model and rule base of medium voltage distribution network connection mode are established according to the basic wiring theory. Based on the model and rule base, the software of medium voltage distribution network connection mode selection is developed on the platform of Visual Studio 2010. The basic variables are determined according to the boundary conditions in the planning area, and the wiring mode is obtained by setting the software parameters. In order to evaluate the connection mode synthetically, the comprehensive evaluation index system is constructed from the consideration of risk, reliability and economy, and the dimensionalized index value of fuzzy membership function is introduced. Get the comprehensive score of the wiring mode to be evaluated and then select the optimal connection mode. Finally. The rationality of the method is proved by the example of the selection of the connection mode in the power supply area of the open area, which is guided by the goal of the medium voltage distribution network planning, and is based on the risk of the grid frame and the overall coordination of the power network. Considering the reliability and economy of power supply, the comprehensive evaluation index system of planning power network scheme is constructed. In order to accurately evaluate the risk level of the planned power grid, a distribution network risk assessment method considering the potential risk caused by the defects of the grid structure is introduced, and the risk index system of the grid structure is established. Combined with the calculation of the risk quantification value and the division of the risk grade, the comprehensive risk level of the planning power network is determined. Based on the planning requirements of coordination and coordination of distribution network, this paper evaluates the coordination of planning power network from two aspects: the reasonable degree of ease to load ratio and the load balance degree. Finally, the concrete implementation steps of planning network evaluation are given. The effectiveness of the method is verified by an engineering example of two planning schemes in a planning area, which is of guiding significance to the evaluation and decision of the planning power network.
【學位授予單位】：東北電力大學
【學位級別】：碩士
【學位授予年份】：2017
【分類號】：TM715

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