本文選題：電池儲(chǔ)能系統(tǒng) + 電壓分布��； 參考：《北京交通大學(xué)》2014年碩士論文

【摘要】：在建設(shè)可持續(xù)發(fā)展社會(huì)的背景下,主動(dòng)配電網(wǎng)技術(shù)得到快速發(fā)展,電池儲(chǔ)能系統(tǒng)以其靈活、高效、綠色環(huán)保等特點(diǎn)在主動(dòng)配電網(wǎng)中受到越來越多的關(guān)注。鋰離子電池具有標(biāo)稱電壓高、比能量大、循環(huán)壽命長(zhǎng)等優(yōu)點(diǎn),逐步成為電池儲(chǔ)能領(lǐng)域的應(yīng)用熱點(diǎn)。隨著儲(chǔ)能系統(tǒng)應(yīng)用的增多,關(guān)于儲(chǔ)能優(yōu)化配置的研究需要持續(xù)深入,本文以改善配電網(wǎng)電壓質(zhì)量和減少電網(wǎng)損耗為優(yōu)化目標(biāo),對(duì)電池儲(chǔ)能系統(tǒng)在配電網(wǎng)中的容量?jī)?yōu)化配置方法和儲(chǔ)能優(yōu)化布點(diǎn)方法進(jìn)行了研究。 首先,建立鋰電池儲(chǔ)能系統(tǒng)模型,包括串聯(lián)電池組仿真模型和PWM整流器仿真模型。本文選擇磷酸鐵鋰電池作為樣本電池進(jìn)行參數(shù)測(cè)試實(shí)驗(yàn),通過實(shí)驗(yàn)數(shù)據(jù)在Matlab中進(jìn)行電池等效電路的參數(shù)識(shí)別與擬合計(jì)算,然后求解等效電路的狀態(tài)方程,得到電池的外特性輸出數(shù)值,建立起單體電池仿真模型。再根據(jù)串聯(lián)電池簡(jiǎn)化成組方法獲得串聯(lián)電池組的等效電路模型,建立起串聯(lián)電池組的仿真模型。與PWM整流器模型連接形成電池儲(chǔ)能系統(tǒng)模型,為后續(xù)仿真分析儲(chǔ)能系統(tǒng)對(duì)配電網(wǎng)電壓分布的影響奠定基礎(chǔ)。 其次,理論分析電池儲(chǔ)能系統(tǒng)接入容量和接入位置對(duì)配電網(wǎng)電壓分布的影響,并利用搭建的歐洲標(biāo)準(zhǔn)低壓配電網(wǎng)模型進(jìn)行仿真實(shí)驗(yàn),驗(yàn)證理論分析的正確性。通過理論分析與仿真驗(yàn)證可以得到,電池儲(chǔ)能系統(tǒng)合理選擇接入位置和接入容量時(shí)才可以提高配電網(wǎng)的電壓質(zhì)量,否則可能引起電網(wǎng)節(jié)點(diǎn)電壓的過大抬升,甚至出現(xiàn)電壓越限,對(duì)配電網(wǎng)電壓穩(wěn)定性帶來負(fù)面影響。 最后,根據(jù)儲(chǔ)能系統(tǒng)對(duì)配電網(wǎng)電壓分布影響的研究結(jié)論來指導(dǎo)儲(chǔ)能接入配電網(wǎng)的節(jié)點(diǎn)選擇,然后以減小電壓偏移、降低電網(wǎng)損耗為出發(fā)點(diǎn),建立儲(chǔ)能系統(tǒng)的容量?jī)?yōu)化配置方法。選擇粒子群算法進(jìn)行優(yōu)化配置模型的求解,得到儲(chǔ)能功率曲線的可行解,計(jì)算得到儲(chǔ)能的容量配置。最后結(jié)合歐洲標(biāo)準(zhǔn)低壓配電網(wǎng)算例仿真驗(yàn)證了儲(chǔ)能容量?jī)?yōu)化配置模型的可行性。
[Abstract]:Under the background of building sustainable development society, active distribution network technology has been developed rapidly. Battery energy storage system has been paid more and more attention in active distribution network because of its flexibility, high efficiency, green environment and so on. Li-ion batteries have many advantages, such as high nominal voltage, high specific energy, long cycle life and so on. With the increasing application of energy storage system, the research on the optimal allocation of energy storage needs to be further studied. In this paper, the optimization goal is to improve the voltage quality and reduce the loss of the distribution network. In this paper, the optimal configuration of capacity and the optimal distribution of energy storage in the distribution network of battery energy storage system are studied. Firstly, the energy storage system model of lithium battery is established, including series battery pack simulation model and PWM rectifier simulation model. In this paper, the lithium iron phosphate battery is selected as the sample battery to test the parameters. The parameters of the equivalent circuit of the battery are identified and fitted by the experimental data in Matlab, and then the equation of state of the equivalent circuit is solved. The output value of the external characteristics of the battery is obtained, and the simulation model of the single cell is established. Then the equivalent circuit model of the series battery is obtained according to the simplified method of the series battery, and the simulation model of the series battery is established. The battery energy storage system model is formed by connecting with the PWM rectifier model, which lays a foundation for the subsequent simulation analysis of the influence of the energy storage system on the distribution network voltage distribution. Secondly, the influence of access capacity and access location of battery energy storage system on distribution network voltage distribution is analyzed theoretically, and the simulation experiment of European standard low-voltage distribution network model is carried out to verify the correctness of the theoretical analysis. Through theoretical analysis and simulation verification, it can be concluded that the voltage quality of distribution network can be improved only when the battery energy storage system reasonably selects the access position and the access capacity, otherwise, it may cause the excessive uplift of the node voltage of the power network, and even the voltage exceeding the limit. It has a negative effect on the voltage stability of distribution network. Finally, according to the conclusion of the research on the influence of energy storage system on the distribution network voltage distribution, the paper guides the node selection of the energy storage access distribution network, and then establishes the capacity optimization configuration method of the energy storage system based on reducing the voltage offset and reducing the network loss. The particle swarm optimization (PSO) algorithm is selected to solve the optimal configuration model, and the feasible solution of the energy storage power curve is obtained, and the capacity configuration of the energy storage is calculated. Finally, the feasibility of optimal configuration model of energy storage capacity is verified by simulation of European standard low voltage distribution network.
【學(xué)位授予單位】：北京交通大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2014
【分類號(hào)】：TM912

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