本文關(guān)鍵詞：火電—風(fēng)電—儲能聯(lián)合調(diào)頻運(yùn)行算法研究　出處：《北京交通大學(xué)》2016年碩士論文　論文類型：學(xué)位論文

  更多相關(guān)文章： 調(diào)頻 自動(dòng)發(fā)電控制 調(diào)頻性能 風(fēng)電 儲能 模糊PI

【摘要】：傳統(tǒng)化石能源的日益枯竭以及環(huán)境的惡化,加速了能源革命的興起,轉(zhuǎn)變能源生產(chǎn)及運(yùn)行方式具有重要的意義。在大規(guī)模風(fēng)電并網(wǎng)的情況下,風(fēng)電場功率的隨機(jī)性給電網(wǎng)的頻率控制帶來了不利影響,電力儲能技術(shù)的應(yīng)用是解決上述問題的有效途徑。因此,本文針對大規(guī)模風(fēng)電并網(wǎng)條件下,對含風(fēng)電、火電與儲能的區(qū)域電網(wǎng)二次調(diào)頻控制算法進(jìn)行研究。本文首先在電力系統(tǒng)一、二次調(diào)頻的基本原理的基礎(chǔ)上,對火電機(jī)組參與調(diào)頻模塊進(jìn)行簡化,建立了等效區(qū)域電網(wǎng)模型。進(jìn)而深入分析傳統(tǒng)區(qū)域電網(wǎng)一次調(diào)頻的調(diào)頻特性,在數(shù)學(xué)推導(dǎo)基礎(chǔ)上進(jìn)行了仿真驗(yàn)證。同時(shí)分析互聯(lián)區(qū)域電網(wǎng)二次調(diào)頻控制模式及其等效數(shù)學(xué)模型,明確一、二次調(diào)頻控制過程具有響應(yīng)順序上的差異及調(diào)頻容量上的差別。指出兩區(qū)域經(jīng)典模型存在的缺陷,進(jìn)而對此模型進(jìn)行一、二次調(diào)頻解耦控制改進(jìn)。構(gòu)建較為合理的區(qū)域電網(wǎng)調(diào)頻模型,并在二次調(diào)頻控制環(huán)節(jié)考慮發(fā)電約束(GRC)、通訊時(shí)延、頻率偏差系數(shù)的影響進(jìn)行了仿真分析。針對大規(guī)模風(fēng)電機(jī)組并網(wǎng)的情況下,分析風(fēng)電機(jī)組的功頻控制方式,提出通過對轉(zhuǎn)子轉(zhuǎn)速進(jìn)行控制的方式,設(shè)置機(jī)組一次調(diào)頻備用容量,使得風(fēng)電機(jī)組可以參與一次調(diào)頻,并對該方法進(jìn)行仿真驗(yàn)證。基于風(fēng)速4種分量的分析,分析風(fēng)電功率具有隨機(jī)波動(dòng)特性。在頻域上對實(shí)際風(fēng)電場的功率數(shù)據(jù)進(jìn)行分析,結(jié)合兩區(qū)域互聯(lián)系統(tǒng)的傳遞函數(shù)模型,分析風(fēng)電功率的波動(dòng)特性對于電網(wǎng)頻率調(diào)整的影響。明確風(fēng)電功率波動(dòng)對傳統(tǒng)電網(wǎng)一次、二次調(diào)頻影響的不同,為下一步制定二次調(diào)頻控制策略提供理論依據(jù)。根據(jù)儲能的功頻特性,提出儲能輔助電網(wǎng)參與二次調(diào)頻數(shù)學(xué)模型,并與火電機(jī)組對比研究儲能的調(diào)頻性能,充分利用這兩種調(diào)頻電源的優(yōu)勢,提出基于低通濾波算法的儲能參與電網(wǎng)二次調(diào)頻控制策略。考慮儲能的SOC約束條件,對超過SOC區(qū)間的儲能功率輸出進(jìn)行調(diào)整。以儲能在系統(tǒng)中占比不同的情況為例,對濾波算法進(jìn)行仿真驗(yàn)證,為大規(guī)模儲能應(yīng)用于電網(wǎng)調(diào)頻控制策略研究提供參考。最后,根據(jù)風(fēng)電功率對調(diào)頻產(chǎn)生的不利影響,針對傳統(tǒng)AGC的PI控制器進(jìn)行了改進(jìn),提出了模糊PI的AGC控制器。對含風(fēng)電場接入的互聯(lián)兩區(qū)域電網(wǎng)進(jìn)行仿真驗(yàn)證,在二次調(diào)頻CPS標(biāo)準(zhǔn)下對此算法的優(yōu)化性進(jìn)行分析。
[Abstract]:The increasing depletion of traditional fossil energy and the deterioration of the environment have accelerated the rise of the energy revolution. It is of great significance to change the way of energy production and operation. In the case of large-scale wind power integration, the randomness of power of wind farms has adverse effects on the frequency control of power grid. The application of power storage technology is an effective way to solve the above problems. Therefore, in this paper, the two frequency control algorithm of regional power grid with wind power, thermal power and energy storage is studied under the condition of large-scale wind power grid connection. First of all, based on the basic theory of the one or two frequency regulation of power system, this paper simplifies the thermal power unit's participation in the FM module, and establishes the equivalent regional power grid model. Then the FM characteristics of the primary FM in the traditional regional power grid are analyzed, and the simulation verification is carried out on the basis of mathematical deduction. Meanwhile, the two frequency control mode and its equivalent mathematical model of the interconnected regional power grid are analyzed. It is clear that the one or two frequency control process has the difference in response sequence and the difference in frequency modulation capacity. The defects of the classical two region model are pointed out, and the one or two frequency modulation decoupling control of the model is improved. A more reasonable frequency modulation model of regional power network is constructed, and the influence of generation constraint (GRC), communication delay and frequency deviation coefficient is simulated in the two frequency regulation link. For the large scale grid connected wind turbine case, power frequency analysis of wind turbine control mode proposed by controlling the rotor speed, setting unit primary frequency regulation reserve capacity, the wind turbine can participate in a FM, and the method of simulation. Based on the analysis of the 4 components of the wind speed, the random fluctuation characteristics of the wind power are analyzed. In the frequency domain, the power data of the actual wind farm are analyzed, combined with the transfer function model of the two area interconnected system, the influence of the fluctuation characteristics of the wind power on the frequency adjustment of the power grid is analyzed. The influence of wind power fluctuation on the primary and two frequency modulation of the traditional power grid is different, which provides the theoretical basis for the next step of the two frequency modulation control strategy. According to the power frequency characteristics of energy storage, energy storage auxiliary power grid proposed participation in the two FM frequency performance and mathematical model of thermal power plants and comparative study of energy storage, make full use of the advantages of power two FM, two FM is proposed in the grid control strategy of low-pass filtering algorithm based on energy storage. Considering the SOC constraints of energy storage, the energy output of the energy storage over the SOC interval is adjusted. Taking the different proportion of energy storage in the system as an example, the filtering algorithm is simulated and verified, which provides a reference for large-scale energy storage applied in the research of power grid frequency modulation control strategy. Finally, according to the adverse influence of the wind power on the frequency modulation, the PI controller of the traditional AGC is improved, and the fuzzy PI AGC controller is proposed. The simulation of the two regional power grid connected by wind farms is simulated, and the optimization of the algorithm is analyzed under the two frequency modulation CPS standard.
【學(xué)位授予單位】：北京交通大學(xué)
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2016
【分類號】：TM61;TM73

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