【摘要】：風力發(fā)電、光伏發(fā)電發(fā)展迅速,但由于風能、太陽能等可再生能源本身具有間歇性和波動性的特征,再加之大規(guī)模集中接入電網的風/光電基地一般遠離電力負荷中心,且電源結構常常受到“缺煤、少水”的制約,調節(jié)性電源和需求側響應資源缺乏,加大了電網調度的難度。高載能負荷具有可調容量大、響應速度快經濟效益顯著的優(yōu)點,利用高載能負荷參與電網調度,不僅能夠減輕外送通道壓力而且能夠增加可再生能源的消納。本文首先通過理論分析高載能負荷參與可再生能源消納對電網電壓的影響,論證了對高載能負荷參與可再生能源消納進行無功控制研究具有重要的現(xiàn)實意義。接著總結了現(xiàn)有動態(tài)無功補償裝置和靜態(tài)無功補償裝置的動作特性、優(yōu)缺點為無功補償裝置類型的選擇提供理論依據。建立了考慮電壓質量以及無功補償配置投資運維成本的無功優(yōu)化數(shù)學模型,并通過改進遺傳算法對模型進行求解。最后針對高載能負荷參與調壓提出了一種三級電壓控制策略,該策略利用無功/電壓靈敏度信息對地區(qū)電網進行三級電壓控制,在無功補償裝置盡可能少動作的基礎上使得電網的電壓處于合理水平,從而最大化的增加可再生能源的消納。最后將本文所提出的控制策略應用到甘肅省河西電網,驗證了所提出的無功控制策略的可行性與有效性。
[Abstract]:Wind power generation and photovoltaic power generation are developing rapidly, but renewable energy sources such as wind energy, solar energy and other renewable energy sources have the characteristics of intermittence and volatility, and wind / photovoltaic bases with large-scale centralized access to power grids are generally far away from power load centers. The power supply structure is often restricted by "lack of coal and water", and the lack of regulating power supply and demand-side response resources increases the difficulty of power grid dispatching. High load has the advantages of large adjustable capacity, fast response speed and remarkable economic benefit. The use of high load to participate in power grid dispatching can not only reduce the pressure of the outgoing channel but also increase the absorption of renewable energy. In this paper, the influence of high load on the grid voltage is analyzed theoretically, and it is proved that it is of great practical significance to study the reactive power control of high load involved in renewable energy consumption. Then it summarizes the action characteristics of the existing dynamic reactive power compensator and static reactive power compensator. The advantages and disadvantages provide the theoretical basis for the choice of reactive power compensator type. The mathematical model of reactive power optimization considering voltage quality and reactive power compensation configuration investment operation cost is established, and the model is solved by improved genetic algorithm. Finally, a three-stage voltage control strategy is proposed for high-load to participate in voltage regulation. The strategy uses reactive power / voltage sensitivity information to control the three-stage voltage of local power network. On the basis of the minimum operation of the reactive power compensator, the voltage of the power grid is at a reasonable level, thus maximizing the absorption of renewable energy. Finally, the proposed control strategy is applied to the Hexi power grid in Gansu Province, which verifies the feasibility and effectiveness of the proposed reactive power control strategy.
【學位授予單位】：華北電力大學(北京)
【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：2321039