本文關(guān)鍵詞： 風(fēng)光發(fā)電系統(tǒng) 大規(guī)模儲(chǔ)能系統(tǒng) 分層控制 下垂控制 荷電狀態(tài)　出處：《南京理工大學(xué)》2017年碩士論文　論文類型：學(xué)位論文

【摘要】：能源危機(jī)和環(huán)境污染已經(jīng)引起了世界各國的廣泛關(guān)注,大力開發(fā)和利用可再生能源進(jìn)行并網(wǎng)發(fā)電是解決上述問題的有效措施之一。風(fēng)光發(fā)電系統(tǒng)的輸出功率具有隨機(jī)性和間歇性的特點(diǎn),為了提升系統(tǒng)的整體運(yùn)行性能和可靠性,通常在風(fēng)光發(fā)電系統(tǒng)中配置大規(guī)模儲(chǔ)能系統(tǒng)。本文著重針對(duì)大規(guī)模儲(chǔ)能系統(tǒng)的協(xié)調(diào)控制策略進(jìn)行了研究,論文的主要工作如下:1、建立了風(fēng)光發(fā)電系統(tǒng)以及大規(guī)模蓄電池的數(shù)學(xué)模型,研究了風(fēng)力發(fā)電機(jī)和光伏-電池的工作特性,分析了風(fēng)光發(fā)電系統(tǒng)的最大功率跟蹤控制的基本原理,設(shè)計(jì)了風(fēng)光發(fā)電系統(tǒng)接口變換器的控制框圖。最后,對(duì)風(fēng)速變化、光照強(qiáng)度變化以及溫度變化進(jìn)行了MPPT仿真研究。2、提出了一種基于電力負(fù)荷峰谷變化的大規(guī)模儲(chǔ)能系統(tǒng)參與風(fēng)光發(fā)電系統(tǒng)的二層協(xié)調(diào)控制,根據(jù)電力負(fù)荷狀態(tài)劃分了三種工作模式,給出了儲(chǔ)能單元的底層控制策略和系統(tǒng)的上層控制策略,對(duì)所提出的二層協(xié)調(diào)控制方法進(jìn)行了仿真研究,所提出的研究方法能夠根據(jù)儲(chǔ)能自身狀態(tài)在優(yōu)先滿足本地負(fù)載的情況下,實(shí)現(xiàn)削峰填谷的功能。3、針對(duì)傳統(tǒng)下垂控制未考慮不同蓄電池荷電狀態(tài)和安全運(yùn)行范圍的不足,提出了一種基于SOC功率分配的有效安全運(yùn)行范圍內(nèi)的儲(chǔ)能系統(tǒng)控制策略。根據(jù)電池荷電狀態(tài)劃分了三種運(yùn)行模式,給出了改進(jìn)下垂控制的基本原理和變下垂因子的獲取方法,并對(duì)改進(jìn)下垂控制方法進(jìn)行了仿真研究,仿真結(jié)果表明該方法能夠有效避免蓄電池進(jìn)入過度充電和放電區(qū)域,提升了系統(tǒng)可靠性。
[Abstract]:Energy crisis and environmental pollution have attracted the attention of many countries all over the world. One of the effective measures to solve the above problems is to develop and utilize renewable energy to generate electricity grid. The output power of wind power generation system has the characteristics of randomness and intermittence. In order to improve the overall performance and reliability of the system, the large-scale energy storage system is usually configured in the wind power generation system. The coordinated control strategy of the large-scale energy storage system is studied in this paper. The main work of this paper is as follows: 1. The mathematical models of wind power generation system and large-scale battery are established, and the working characteristics of wind turbine and photovoltaic cell are studied. The basic principle of maximum power tracking control for wind power generation system is analyzed, and the control block diagram of interface converter for wind power generation system is designed. Finally, the variation of wind speed is discussed. The change of illumination intensity and temperature are studied by MPPT simulation. 2. A large-scale energy storage system based on the change of peak and valley power load is proposed to participate in the two-layer coordinated control of wind-generation system. According to the power load state, the paper divides three working modes, gives the bottom control strategy of the energy storage unit and the upper control strategy of the system, and simulates the proposed two-layer coordinated control method. The proposed research method can realize the function of cutting peak and filling valley according to the state of energy storage under the condition that the local load is satisfied first. The traditional droop control does not consider the shortcomings of different battery charging states and safe operation range. In this paper, a control strategy of energy storage system based on SOC power allocation is proposed, and three operation modes are divided according to the charging state of the battery. The basic principle of improved droop control and the method of obtaining variable sag factor are given, and the simulation of the improved droop control method is carried out. The simulation results show that the proposed method can effectively avoid the storage battery from overcharging and discharging areas and improve the reliability of the system.
【學(xué)位授予單位】：南京理工大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2017
【分類號(hào)】：TM732;TM61

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本文編號(hào)：1456654