【摘要】：為緩解能源短缺和環(huán)境污染問題,以光伏為代表的新能源發(fā)電技術(shù)得到了快速發(fā)展。雖然光伏發(fā)電技術(shù)已經(jīng)相對成熟,但是由于受溫度和光照強(qiáng)度變化的影響,光伏發(fā)電功率仍存在一定的波動性和隨機(jī)性。為解決光伏電站輸出功率具有波動性問題,本文從棄光角度出發(fā),開展了光儲聯(lián)合發(fā)電系統(tǒng)輸出功率平滑策略研究,具體研究內(nèi)容如下:首先,在分析光伏發(fā)電原理的基礎(chǔ)之上,從電路模型和工程模型兩個(gè)角度出發(fā),分別給出了不同光照強(qiáng)度和溫度下光伏電池模型建立方法�；诠夥娬具\(yùn)行歷史數(shù)據(jù),開展光伏電站輸出功率波動分析。針對光伏電站輸出功率波動率指標(biāo),研究了光伏電站輸出功率波動率分布,分析了光伏電站棄光原因。其次,在分析電化學(xué)儲能、抽水蓄能、超級電容儲能的充放電原理和儲能電站內(nèi)部構(gòu)成的基礎(chǔ)上,以應(yīng)用范圍最廣的鋰離子電池為研究對象,研究內(nèi)阻模型、戴維南模型和PNGV模型�？紤]儲能系統(tǒng)荷電狀態(tài)、充放電功率和儲能系統(tǒng)容量等參數(shù),結(jié)合安時(shí)計(jì)量法,提出了儲能系統(tǒng)仿真應(yīng)用模型,并針對此模型建立相應(yīng)約束條件。從新能源發(fā)電、電網(wǎng)安全運(yùn)行、分布式發(fā)電及微網(wǎng)等角度分析得出儲能系統(tǒng)運(yùn)行指標(biāo),作為光儲聯(lián)合發(fā)電系統(tǒng)輸出功率平滑策略的制定依據(jù)。再次,開展儲能電站站內(nèi)控制研究,提出了考慮區(qū)域自治的儲能電站功率協(xié)調(diào)控制策略。策略提出了儲能電站分區(qū)方法,設(shè)計(jì)了儲能子站代理模型,確定考慮自治控制的電池儲能電站功率求解方法,為光儲聯(lián)合發(fā)電系統(tǒng)輸出功率平滑策略的制定提供理論支撐。最后,為同時(shí)解決光伏電站輸出功率波動率大和棄光兩個(gè)問題,建立了考慮棄光的光儲聯(lián)合發(fā)電系統(tǒng)輸出功率平滑策略。參考國家標(biāo)準(zhǔn)制定了棄光規(guī)則,建立了計(jì)及棄光的光儲聯(lián)合電站輸出功率控制目標(biāo)函數(shù)。根據(jù)前一時(shí)間段歷史光儲聯(lián)合輸出功率對當(dāng)前光伏輸出功率預(yù)測值進(jìn)行劃分,確定光伏正常發(fā)電區(qū)間與棄光區(qū)間,并給出各區(qū)間內(nèi)儲能系統(tǒng)輸出功率范圍�；诮⒌哪繕�(biāo)函數(shù)采用遺傳算法對儲能系統(tǒng)輸出功率進(jìn)行優(yōu)化,確定優(yōu)化后的儲能系統(tǒng)輸出功率。仿真結(jié)果表明:優(yōu)化后的儲能系統(tǒng)輸出功率配合當(dāng)前時(shí)刻光伏輸出功率,不僅能夠平滑光儲聯(lián)合電站輸出功率,而且在棄光方面比原有控制策略更加有效。
[Abstract]:In order to alleviate the problem of energy shortage and environmental pollution, new energy generation technology, represented by photovoltaic, has been developed rapidly. Although photovoltaic power generation technology is relatively mature, due to the influence of temperature and light intensity, photovoltaic power still has some volatility and randomness. In order to solve the problem of the fluctuation of output power in photovoltaic power plant, this paper studies the output power smoothing strategy of optical storage combined generation system from the perspective of light abandonment. The specific research contents are as follows: first, On the basis of analyzing the principle of photovoltaic power generation, the methods of building photovoltaic cell model under different light intensity and temperature are given from the view of circuit model and engineering model. Based on the operating history data of photovoltaic power station, the fluctuation analysis of output power of photovoltaic power station is carried out. According to the fluctuation index of output power of photovoltaic power station, the fluctuation distribution of output power of photovoltaic power station is studied, and the reason of light abandonment is analyzed. Secondly, on the basis of analyzing the charging and discharging principle of electrochemical energy storage, pumped storage, super capacitor energy storage and the internal composition of energy storage power station, the internal resistance model of lithium ion battery, which has the most extensive application, is studied. Davinan model and PNGV model. Considering the parameters of energy storage system, such as charge state, charge / discharge power and energy storage system capacity, combined with amperometric method, a simulation application model of energy storage system is proposed, and the corresponding constraints are established for the model. From the aspects of new energy generation, safe operation of power grid, distributed generation and microgrid, the operating index of energy storage system is obtained, which can be used as the basis for formulating the output power smoothing strategy of optical storage combined generation system. Thirdly, the research on in-station control of energy storage power station is carried out, and the coordinated power control strategy of energy storage power station considering regional autonomy is put forward. In this paper, the partition method of energy storage power station is put forward, the proxy model of energy storage sub-station is designed, and the power solution method of battery energy storage power station considering autonomous control is determined, which provides theoretical support for the formulation of smooth output power strategy of optical storage combined generation system. Finally, in order to solve the two problems of high output power fluctuation and light abandonment simultaneously, the output power smoothing strategy of optical storage combined generation system with light loss is proposed. With reference to the national standard, the rule of light rejection is formulated, and the output power control objective function of the combined optical storage and storage power station is established. According to the historical light storage combined output power in the previous period, the prediction value of the current photovoltaic output power is divided, and the range of the output power of the energy storage system in each region is given. Based on the established objective function, the output power of the energy storage system is optimized by genetic algorithm, and the optimized output power of the energy storage system is determined. The simulation results show that the output power of the optimized energy storage system can not only smooth the output power of the combined optical storage power station, but also be more effective than the original control strategy.
【學(xué)位授予單位】：東北電力大學(xué)
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2017
【分類號】：TM619

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相關(guān)期刊論文 前10條

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本文編號：2364155