【摘要】：平抑風電功率短時波動可有效抑制風電并網對電力系統(tǒng)調頻的不良影響，而受物理條件約束，，單一類型儲能介質都難以單獨承擔對風電功率短時波動的平抑任務。由多類型儲能介質構成的混合儲能系統(tǒng)具有循環(huán)次數高、功率密度高和能量密度高等優(yōu)點，可望成為平抑風電功率波動的有效儲能形態(tài)�；旌蟽δ芟到y(tǒng)應用的關鍵是如何選擇其配置并設計合理有效的控制策略，在滿足風電功率波動平抑需求的基礎上實現(xiàn)運行成本的最小化。 以某風電場運行數據為基礎，分析了風電機組-風電場短時波動特性，為混合儲能系統(tǒng)在平抑風電功率短時波動中的應用提供實證基礎。 針對電池-超級電容器構成的混合儲能系統(tǒng)，設計了含滯環(huán)控制的低通濾波平滑控制策略以抑制風電功率短時波動。考慮儲能系統(tǒng)工作狀態(tài)，基于滑動平均值原理確定了電池參考輸出功率，以實現(xiàn)電池對風電功率趨勢性波動分量的控制，超級電容器用以平抑風電功率快變波動分量。 研究最小化混合儲能系統(tǒng)成本的優(yōu)化配置方法。綜合考慮儲能介質自身特性，建立了基于全生命周期成本的混合儲能系統(tǒng)年均成本計算模型。以最小化混合儲能系統(tǒng)年均成本為目標，研究滿足風電功率波動平抑要求的最優(yōu)運行控制參數和兩種儲能介質的配置及成本。 仿真分析基于風電場運行數據驗證了所提控制策略的有效性，并分析了相關運行控制參數對混合儲能系統(tǒng)運行技術性和經濟性的影響，得到儲能系統(tǒng)的最優(yōu)控制參數和配置結果。 基于所研究的混合儲能系統(tǒng)控制策略及配置方法，在Visual Studio和SQLsever環(huán)境下構建了風-儲聯(lián)網運行分析平臺。實現(xiàn)對風電/負荷數據的管理及分析，為實際工程中儲能系統(tǒng)運行性能分析及配置選擇提供可視化操作平臺。
[Abstract]:The short term fluctuation of wind power can effectively restrain the adverse effect of wind power grid connection on frequency modulation of power system. However, the single type of energy storage medium can hardly take the task of suppressing the short term fluctuation of wind power alone, which is restricted by physical conditions. The hybrid energy storage system composed of multi-type energy storage media has the advantages of high cycle times, high power density and high energy density, which is expected to be an effective energy storage form for suppressing the fluctuation of wind power. The key to the application of hybrid energy storage system is how to select its configuration and design a reasonable and effective control strategy to minimize the operation cost on the basis of satisfying the demand of wind power fluctuation. Based on the operation data of a wind farm, the short-time fluctuation characteristics of wind turbine and wind farm are analyzed, which provides an empirical basis for the application of hybrid energy storage system in stabilizing the short-term fluctuation of wind power. A low pass filter smoothing control strategy with hysteresis control is designed for hybrid energy storage system composed of battery and supercapacitor to suppress short term fluctuation of wind power. Considering the working state of the energy storage system, the reference output power of the battery is determined based on the principle of sliding average, so as to realize the control of the trend fluctuation component of the wind power by the battery, and the supercapacitor is used to stabilize the fast fluctuating component of the wind power. The optimal configuration method for minimizing the cost of hybrid energy storage system is studied. Considering the characteristics of energy storage medium, an annual cost calculation model of hybrid energy storage system based on full life cycle cost is established. Aiming at minimizing the average annual cost of hybrid energy storage system, the optimal operating control parameters and the configuration and cost of two kinds of energy storage media are studied to meet the requirements of wind power fluctuation and stabilization. The effectiveness of the proposed control strategy is verified by simulation analysis based on wind farm operation data, and the influence of related operation control parameters on the technical and economic performance of hybrid energy storage system is analyzed. The optimal control parameters and configuration results of the energy storage system are obtained. Based on the control strategy and configuration method of hybrid energy storage system, an analysis platform of air-storage network operation is constructed under Visual Studio and SQLsever environment. It realizes the management and analysis of wind power / load data and provides a visual operating platform for performance analysis and configuration selection of energy storage system in practical engineering.
【學位授予單位】：東北電力大學
【學位級別】：碩士
【學位授予年份】：2014
【分類號】：TM614

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