本文關(guān)鍵詞： 可再生能源 風電 混合儲能 容量配置　出處：《華北電力大學》2014年碩士論文　論文類型：學位論文

【摘要】：隨著風電裝機容量和滲透率的不斷提高,其波動性和間歇性給電網(wǎng)造成的沖擊越來越明顯,接入電網(wǎng)的迫切需求與電網(wǎng)有限的承受能力之間的矛盾也逐漸增加。為降低風電功率波動和提高電網(wǎng)的接納能力,儲能系統(tǒng)已得到廣泛應(yīng)用。針對這一現(xiàn)狀,本文提出了用于平抑風電功率波動的混合儲能系統(tǒng)控制策略,并對容量優(yōu)化配置方法進行了分析,主要內(nèi)容如下： 首先,本文提出了一種用于平抑風電功率波動的混合儲能功率分配方法。在建立系統(tǒng)模型的基礎(chǔ)上,根據(jù)不同儲能設(shè)備的特點,使其承擔不同的平抑任務(wù)。文中基于經(jīng)驗?zāi)B(tài)分解原理,將風電功率從頻域上進行劃分并分配給電池和超級電容器,同時根據(jù)荷電狀態(tài)對儲能的輸出功率進行調(diào)整,以避免儲能的過充或過放。仿真結(jié)果表明,該方法的平抑效果顯著,且充分發(fā)揮了儲能設(shè)備的特性,維持了設(shè)備荷電狀態(tài)的穩(wěn)定。 其次,由于系統(tǒng)平抑效果和經(jīng)濟性受容量配置的直接影響,提出一種基于全壽命周期成本的混合儲能容量配置方法。該方法利用雨流計數(shù)法計算電池放電深度,進而通過等效循環(huán)壽命方法對電池的壽命進行量化。在分析各階段所產(chǎn)生的成本的基礎(chǔ)上,以年均成本最小為目標,并考慮置信度和儲能設(shè)備荷電狀態(tài)的約束,得到了年均成本與容量配置的對應(yīng)關(guān)系。仿真結(jié)果表明,相比于傳統(tǒng)的單類型容量配置方法,該方法削減了儲能系統(tǒng)在整個生命周期的成本,更具有現(xiàn)實意義。 最后,綜合前文的研究成果,利用Matlab GUI圖形界面開發(fā)了混合儲能應(yīng)用平臺,并將其編譯成為獨立可執(zhí)行文件。該軟件具有良好的通用性和交互性,可用于不同風電場功率平抑與容量配置的分析。
[Abstract]:With the increasing of installed capacity and permeability of wind power, the impact of its volatility and intermittency on the power grid becomes more and more obvious. In order to reduce the fluctuation of wind power and improve the acceptance capacity of power grid, energy storage system has been widely used. In this paper, the control strategy of hybrid energy storage system is proposed to suppress the fluctuation of wind power, and the optimal configuration method of capacity is analyzed. The main contents are as follows:. First of all, a hybrid energy storage power allocation method is proposed to suppress the fluctuation of wind power. Based on the system model, according to the characteristics of different energy storage equipment, Based on the principle of empirical mode decomposition, wind power is divided from frequency domain and distributed to batteries and supercapacitors. At the same time, the output power of storage energy is adjusted according to the charge state. The simulation results show that the proposed method is effective in stabilizing the energy storage equipment, exerting the characteristics of the energy storage equipment and maintaining the stability of the charged state of the equipment. Secondly, because the efficiency and economy of the system are directly affected by the capacity allocation, a hybrid energy storage capacity allocation method based on the whole life cycle cost is proposed, which uses the rain flow counting method to calculate the discharge depth of the battery. Then the life of the battery is quantified by the equivalent cycle life method. Based on the analysis of the cost of each stage, the minimum annual cost is taken as the goal, and the constraints of confidence and the charging state of the energy storage equipment are taken into account. The corresponding relationship between annual cost and capacity allocation is obtained. The simulation results show that compared with the traditional single-type capacity allocation method, this method reduces the cost of energy storage system in the whole life cycle, and has more practical significance. Finally, a hybrid energy storage application platform is developed by using Matlab GUI graphical interface and compiled into an independent executable file. The software has good versatility and interactivity. It can be used to analyze the power stabilization and capacity configuration of different wind farms.
【學位授予單位】：華北電力大學
【學位級別】：碩士
【學位授予年份】：2014
【分類號】：TM614

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