本文選題：電力調度　切入點：新能源　出處：《東北電力大學》2017年碩士論文　論文類型：學位論文

【摘要】：2015年,我國對風電機組的裝機量超過11.46萬MW,光伏機組裝機量超過1.86萬MW,總共安裝新能源機組數目超過7萬臺。新能源大規(guī)模并網下,其大多處于負荷較低的地區(qū),因為電網規(guī)模小,如果遠距離傳輸,網損和層層變損對輸電經濟性影響很大。同時新能源波動性、隨機性特質使電力調度的調峰問題愈加嚴峻。為了降低輸電網絡的運行費用,達到經濟調度、合理調度的目的,針對電網企業(yè)安全運行中存在的經濟、快速調度的不足之處,對結合新能源的調度策略進行研究。實現(xiàn)的主要工作具體如下:首先,對電力系統(tǒng)發(fā)電端調度策略進行深入研究,在新能源機組與傳統(tǒng)機組組合發(fā)電調度的前提下,研究當下調度算法的特點,并對解決效果進行了分析。針對大規(guī)模新能源機組并網,機組組合發(fā)電算法的計算易造成“維數災”問題,對新能源并網下的如何快速計算機組組合的最小成本花費問題進行研究,設計了基于決策量的動態(tài)規(guī)劃算法,以符合新能源的約束要求作為決策,對新能源機組的出力進行合理安排,最終快速計算負荷供給平衡下的最小經濟成本。其次,對自主運行的電力孤島進行最優(yōu)路徑規(guī)劃的研究,孤島是脫離大電網自主運行的小型局域電網。含有大量新能源并網使網絡接線數目增加,連線方式特別復雜,區(qū)間位置跨度大,輸送途中也存在較高事故發(fā)生的可能。當局部因某原因出現(xiàn)電力孤島時,應快速確定最佳輸電路徑供應電力孤島,盡可能減少傳輸過程的損失。本文提出基于改進的啟發(fā)式搜索最優(yōu)路徑規(guī)劃算法,以維護大電網安全、保證電力孤島穩(wěn)定運行同時,減少網絡傳輸的花費。最后,對上述電力系統(tǒng)調度策略進行實驗驗證,本文完成了基于決策量的動態(tài)算法和基于改進的啟發(fā)式搜索算法,從算法執(zhí)行效率、計算結果分析調度策略的有效性并給出整個策略的具體流程,實驗結果表明本文提出結合新能源的電力系統(tǒng)調度策略的研究對電網調度策略提供了一定的參照價值。
[Abstract]:In 2015, China installed more than 114,600 MWs of wind turbines and 18,600 MWs of photovoltaic units, with a total of more than 70,000 new energy units installed. Because of the small scale of the power network, if the transmission is long distance, the loss and the layer by layer change will have a great impact on the economy of transmission. Meanwhile, the fluctuation of new energy and the randomness of the power supply make the problem of power dispatching peak regulation more serious. In order to reduce the operating cost of the transmission network, To achieve the purpose of economic dispatch and reasonable dispatch, aiming at the shortcomings of economic and rapid dispatch in the safe operation of power grid enterprises, this paper studies the scheduling strategy combined with new energy. The main work is as follows: first, Based on the deep research of generation terminal scheduling strategy of power system, under the premise of new energy unit and traditional unit combined generation dispatching, the characteristics of current scheduling algorithm are studied. The solution effect is analyzed. For large-scale new energy generating units connected to the grid, the calculation of generating algorithm of unit combination is easy to cause the problem of "dimension disaster". In this paper, the minimum cost problem of fast combination of computers is studied, and a dynamic programming algorithm based on decision quantity is designed to meet the constraint requirements of new energy. Finally, the minimum economic cost of load supply balance is calculated quickly. Secondly, the optimal path planning of autonomous power island is studied. Islanding is a small local power network that operates independently from the large power grid. It contains a large number of new energy sources and makes the number of network connections increase, the mode of connection is particularly complex, and the interval position span is large. There is also the possibility of higher accidents in transit. When there is an isolated island for some reason, the optimal transmission path should be determined quickly to supply the isolated island of power. This paper proposes an improved heuristic search algorithm for optimal path planning to maintain the security of large power grids, ensure the stable operation of isolated islands, and reduce the cost of network transmission. In this paper, the dynamic algorithm based on the decision quantity and the heuristic search algorithm based on the improved algorithm are completed, and the efficiency of the algorithm is analyzed. The result of calculation analyzes the effectiveness of the dispatching strategy and gives the specific flow of the whole strategy. The experimental results show that the research of the dispatching strategy of power system combined with new energy provides a certain reference value for the dispatching strategy of the 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】：TM73

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本文編號：1562238