本文選題：超級(jí)電容器-蓄電池混合儲(chǔ)能系統(tǒng) + 分界頻率�。� 參考：《華北電力大學(xué)》2017年碩士論文

【摘要】：為了在大功率脈動(dòng)負(fù)荷系統(tǒng)中實(shí)現(xiàn)能源的回收利用,達(dá)到“降本增效,節(jié)能減排”的目的;為了平滑光伏發(fā)電系統(tǒng)輸出的不穩(wěn)定功率,平抑自然環(huán)境因素和負(fù)載波動(dòng)因素帶來的擾動(dòng),提高光伏發(fā)電系統(tǒng)的電能質(zhì)量和并網(wǎng)安全穩(wěn)定性,改善光伏發(fā)電系統(tǒng)的穩(wěn)定運(yùn)行特性,引入儲(chǔ)能技術(shù)成了必然趨勢(shì),所以對(duì)儲(chǔ)能技術(shù)的研究具有重要意義。本文提出一種超級(jí)電容器-蓄電池混合儲(chǔ)能系統(tǒng)容量優(yōu)化配置的計(jì)算方法。首先將系統(tǒng)不平衡功率進(jìn)行經(jīng)驗(yàn)?zāi)B(tài)分解,獲得高頻功率分量和低頻功率分量,充分發(fā)揮超級(jí)電容器循環(huán)壽命高、功率密度大和蓄電池能量密度大的優(yōu)點(diǎn),由超級(jí)電容器負(fù)責(zé)高頻功率分量,蓄電池承擔(dān)低頻功率分量;然后在混合儲(chǔ)能系統(tǒng)全生命周期成本的目標(biāo)函數(shù)里考慮變流器的運(yùn)行方式與成本,將其作為獨(dú)立的個(gè)體參與混合儲(chǔ)能容量配置計(jì)算,使得計(jì)算結(jié)果更準(zhǔn)確;最后根據(jù)能量損失率和能量缺失率兩個(gè)約束指標(biāo)采用遺傳算法對(duì)目標(biāo)函數(shù)求解。本文將所提出的超級(jí)電容器-蓄電池混合儲(chǔ)能系統(tǒng)容量優(yōu)化配置的方法應(yīng)用到大功率脈動(dòng)負(fù)荷所在系統(tǒng)、獨(dú)立光伏發(fā)電系統(tǒng)和統(tǒng)購統(tǒng)銷模式并網(wǎng)光伏發(fā)電系統(tǒng)中。首先介紹三種系統(tǒng)的結(jié)構(gòu)和工作原理,明確混合儲(chǔ)能系統(tǒng)的作用,然后在不同的系統(tǒng)中建立超級(jí)電容器-蓄電池混合儲(chǔ)能系統(tǒng)容量優(yōu)化模型,并對(duì)實(shí)例進(jìn)行計(jì)算。通過算例結(jié)果分析,本文提出的超級(jí)電容器-蓄電池混合儲(chǔ)能系統(tǒng)在三種不同的系統(tǒng)中起到了重要的作用,改善了三種系統(tǒng)的工作狀態(tài):大功率脈動(dòng)負(fù)荷系統(tǒng)中,混合儲(chǔ)能系統(tǒng)避免了電能的大量浪費(fèi),減輕了環(huán)境污染;獨(dú)立光伏系統(tǒng)中,混合儲(chǔ)能可以有效平抑功率波動(dòng)、穩(wěn)定直流母線的電壓、提高光伏電能質(zhì)量;統(tǒng)購統(tǒng)銷模式并網(wǎng)光伏發(fā)電系統(tǒng)中,合理利用了電能資源提高整個(gè)系統(tǒng)的經(jīng)濟(jì)性。本文所提方法可以充分發(fā)揮超級(jí)電容器和蓄電池的優(yōu)勢(shì),實(shí)現(xiàn)運(yùn)行系統(tǒng)的經(jīng)濟(jì)性,相對(duì)于不考慮變流器成本的模型,本方法容量配置計(jì)算更加全面。
[Abstract]:In order to realize the recovery and utilization of energy in the high-power pulsating load system, to achieve the goal of "reducing cost and increasing efficiency, saving energy and reducing emissions", and to smooth the unstable power output of photovoltaic power generation system, It is an inevitable trend to stabilize the disturbance caused by natural environment and load fluctuation factors, to improve the power quality of photovoltaic power system and the safety and stability of grid connection, to improve the stable operation characteristics of photovoltaic power generation system, and to introduce energy storage technology. Therefore, the study of energy storage technology is of great significance. In this paper, a calculation method for capacity optimization of supercapacitor-battery hybrid energy storage system is presented. Firstly, the unbalanced power of the system is decomposed into empirical mode to obtain the high frequency power component and the low frequency power component. The advantages of high cycle life, high power density and high battery energy density of the supercapacitor are brought into full play. The supercapacitor is responsible for the high-frequency power component and the battery takes the low-frequency power component. Then the operation mode and cost of the converter are considered in the objective function of the full life cycle cost of the hybrid energy storage system. Taking it as an independent individual to participate in the calculation of mixed energy storage capacity, the result is more accurate. Finally, the objective function is solved by genetic algorithm according to the two constraint indexes of energy loss rate and energy loss rate. In this paper, the proposed method of optimizing the capacity of hybrid energy storage system of supercapacitors and batteries is applied to the system of high-power pulsating load, the independent photovoltaic power generation system and the grid-connected photovoltaic power generation system in the mode of monopoly purchase. Firstly, the structure and working principle of the three systems are introduced, and the function of the hybrid energy storage system is clarified. Then, the capacity optimization model of the supercapacitor-battery hybrid energy storage system is established in different systems, and an example is calculated. Through the analysis of the results of numerical examples, the supercapacitor-battery hybrid energy storage system proposed in this paper plays an important role in three different systems, and improves the working state of the three systems: the high-power pulsating load system. In the independent photovoltaic system, the hybrid energy storage system can effectively stabilize the power fluctuation, stabilize the voltage of DC bus, and improve the quality of photovoltaic power. In the grid-connected photovoltaic power generation system, the power resources are used reasonably to improve the economy of the whole system. The method proposed in this paper can give full play to the advantages of supercapacitors and batteries and realize the economy of the operation system. Compared with the model without considering the cost of the converter, the capacity configuration calculation of this method is more comprehensive.
【學(xué)位授予單位】：華北電力大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2017
【分類號(hào)】：TM53;TM912

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本文編號(hào)：1961657