【摘要】：臺風(fēng)天氣常常給沿海電力系統(tǒng)帶來巨大的運行風(fēng)險與經(jīng)濟損失，而配電網(wǎng)由于設(shè)計標準往往低于主網(wǎng)，配電設(shè)施損壞尤為嚴重，常常造成“主網(wǎng)堅強，配電送電困難”現(xiàn)象。架空配電線路倒桿斷線故障是臺風(fēng)天氣下配電系統(tǒng)主要故障形式，同時也是配電設(shè)施受損的主要方面，對其進行可靠性建模與風(fēng)險評估是制定風(fēng)災(zāi)防御措施的重要依據(jù)。本文圍繞配電系統(tǒng)抗風(fēng)災(zāi)能力，建立了臺風(fēng)天氣下架空配電線路荷載可靠性模型，基于該模型對臺風(fēng)天氣下配電系統(tǒng)可靠性進行了評估，同時建立了架空配電線路桿塔及檔距優(yōu)化模型，采用遺傳算法對架空配電線路電桿選型與檔距長度進行了優(yōu)化。 論文根據(jù)結(jié)構(gòu)可靠性原理，基于臺風(fēng)的風(fēng)速和風(fēng)向等計算導(dǎo)線和電桿的風(fēng)荷載，結(jié)合導(dǎo)線與電桿的強度隨機變量，通過荷載效應(yīng)分析建立了導(dǎo)線與電桿的強度-荷載效應(yīng)功能函數(shù)，，通過積分變換建立架空配電線路荷載可靠度模型。該模型可反映架空配電線路在臺風(fēng)天氣下倒桿斷線風(fēng)險水平。算例分別分析了線路走向，導(dǎo)線型號與桿塔型號對線路荷載可靠度的影響。 由于倒桿斷線故障是臺風(fēng)天氣下配電系統(tǒng)的主要故障形式，本文建立了臺風(fēng)天氣下架空配電線路荷載可靠性參數(shù)模型，提出了受臺風(fēng)影響的配電網(wǎng)可靠性指標，進而對臺風(fēng)天氣下配電系統(tǒng)可靠性進行了評估。根據(jù)氣象預(yù)測信息，將臺風(fēng)登陸過程以小時為單位劃分時段，計算每個小時段內(nèi)的線路荷載可靠性參數(shù)，采用分塊算法對臺風(fēng)天氣下配電系統(tǒng)的可靠性進行了評估。算例給出了每個時段內(nèi)系統(tǒng)及負荷點的可靠性指標，并分析了臺風(fēng)登陸路徑、裝設(shè)防風(fēng)拉線對配電系統(tǒng)可靠性的影響。算例分析驗證了模型的可行性與有效性。 論文考慮臺風(fēng)最大風(fēng)速的隨機性，基于臺風(fēng)最大風(fēng)速極值I型分布建立了架空配電線路荷載可靠度計算模型，以配電系統(tǒng)全壽命周期成本為目標函數(shù)，電桿型號、檔距長度為決策變量，提出了一種架空配電線路桿塔及檔距規(guī)劃模型。本文考慮線路倒桿斷桿故障造成的停電損失成本，結(jié)合桿塔投資成本、維護成本，構(gòu)建了以配電系統(tǒng)全壽命周期成本為目標函數(shù)、線路檔距為約束條件的桿塔及檔距規(guī)劃模型，并采用遺傳算法對規(guī)劃模型進行了求解�；谠撘�(guī)劃模型，規(guī)劃人員能直觀的掌握架空配電線路荷載風(fēng)險水平，獲得兼顧經(jīng)濟性與可靠性的最優(yōu)方案。
[Abstract]:Typhoon weather often brings huge operation risk and economic loss to coastal power system, but distribution network is often damaged because the design standard is lower than the main network, which often results in the phenomenon of "strong main network and difficulty in distribution and power transmission". The breakage fault of overhead distribution line is the main fault form of distribution system under typhoon weather, and it is also the main aspect of the damage of distribution facilities. The reliability modeling and risk assessment are the important basis for the establishment of wind disaster prevention measures. In this paper, a load reliability model of overhead distribution line under typhoon weather is established, and the reliability of distribution system under typhoon weather is evaluated based on this model. At the same time, the optimization model of tower and distance of overhead distribution line is established, and the selection of pole and distance length of overhead distribution line are optimized by genetic algorithm. According to the principle of structural reliability, based on the wind speed and direction of typhoon, the wind load of conductor and pole is calculated, and the random variable of strength of conductor and pole is combined. Through the analysis of load effect, the function of strength and load effect of conductor and pole is established, and the load reliability model of overhead distribution line is established by integral transformation. The model can reflect the risk level of upside-down line breakage of overhead distribution lines in typhoon weather. Examples are given to analyze the influence of line direction, conductor type and tower type on the reliability of line load. In this paper, the reliability parameter model of overhead distribution line under typhoon weather is established, and the reliability index of distribution network affected by typhoon is put forward. Furthermore, the reliability of distribution system in typhoon weather is evaluated. According to the weather forecast information, the typhoon landing process is divided into hours, and the reliability parameters of the line load in each small period are calculated, and the reliability of distribution system under typhoon weather is evaluated by block algorithm. The reliability index of system and load point in each period is given, and the influence of typhoon landing path and windproof cable installation on the reliability of distribution system is analyzed. The feasibility and validity of the model are verified by an example. Considering the randomness of typhoon maximum wind speed, a model for calculating load reliability of overhead distribution lines is established based on the distribution of typhoon maximum wind speed extremum I. The life cycle cost of distribution system is taken as the objective function, and the type of pole is used. This paper presents a model of overhead distribution line tower and distance planning. In this paper, considering the cost of power outage caused by the fault of the inverted rod and the cost of maintenance, a model of tower and distance planning is established, which takes the life cycle cost of the distribution system as the objective function and the distance of the transmission line as the constraint condition. Genetic algorithm is used to solve the programming model. Based on this planning model, planners can grasp the load risk level of overhead distribution lines intuitively, and obtain the optimal scheme which takes account of both economy and reliability.
【學(xué)位授予單位】：重慶大學(xué)
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2014
【分類號】：TM732

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