【摘要】：智能小區(qū)微網(wǎng)系統(tǒng)是將智能小區(qū)內(nèi)的分布式電源、儲(chǔ)能裝置以及用戶負(fù)載等組織起來形成的低壓電網(wǎng),它通過配電網(wǎng)絡(luò)向智能小區(qū)的居民負(fù)荷供電,既能并網(wǎng)運(yùn)行又能孤島運(yùn)行。智能小區(qū)微網(wǎng)系統(tǒng)作為新的發(fā)電技術(shù)和供能方式的接入端,為實(shí)現(xiàn)分布式電源、儲(chǔ)能單元、負(fù)荷和配電網(wǎng)之間的能量協(xié)調(diào),保障系統(tǒng)可靠供電與經(jīng)濟(jì)運(yùn)行,就需要合理可行的智能小區(qū)微網(wǎng)系統(tǒng)運(yùn)行與控制策略。智能小區(qū)微網(wǎng)系統(tǒng)的經(jīng)濟(jì)調(diào)度是微網(wǎng)系統(tǒng)運(yùn)行控制過程中的重要內(nèi)容,其采用經(jīng)濟(jì)的調(diào)度方案協(xié)調(diào)各分布式電源的出力,以滿足給定的負(fù)荷水平,使系統(tǒng)的運(yùn)行成本最低；智能小區(qū)微網(wǎng)系統(tǒng)的頻率控制是實(shí)現(xiàn)智能小區(qū)微網(wǎng)系統(tǒng)孤網(wǎng)運(yùn)行下安全可靠與經(jīng)濟(jì)運(yùn)行的重要保障,其通過調(diào)整調(diào)頻機(jī)組的功率輸出跟隨波動(dòng)的負(fù)荷需求,以維持智能小區(qū)微網(wǎng)系統(tǒng)頻率的恒定,使系統(tǒng)處于經(jīng)濟(jì)穩(wěn)定的運(yùn)行狀態(tài)。本文圍繞分布式發(fā)電與智能小區(qū)微網(wǎng)系統(tǒng)的經(jīng)濟(jì)調(diào)度與孤網(wǎng)運(yùn)行下的調(diào)頻策略開展研究工作,具體研究?jī)?nèi)容概括如下：(1)首先闡述了智能小區(qū)微網(wǎng)系統(tǒng)國(guó)內(nèi)外研究與發(fā)展現(xiàn)狀,依據(jù)智能小區(qū)的技術(shù)特性、地理環(huán)境和氣候條件,對(duì)含分布式電源的智能小區(qū)微網(wǎng)系統(tǒng)的結(jié)構(gòu)進(jìn)行了整體設(shè)計(jì),將智能小區(qū)微網(wǎng)系統(tǒng)的各部件及其作用進(jìn)行了詳細(xì)闡述,建立了含分布式電源的智能小區(qū)微網(wǎng)系統(tǒng)各發(fā)電單元的數(shù)學(xué)模型,主要包括風(fēng)力發(fā)電機(jī)組模型、光伏陣列模型、蓄電池模型、微型燃?xì)廨啓C(jī)模型和電動(dòng)汽車模型。(2)根據(jù)智能小區(qū)所在地的氣候條件(太陽輻射強(qiáng)度、風(fēng)速、環(huán)境溫度等),對(duì)系統(tǒng)分布式能源數(shù)據(jù)進(jìn)行了處理,依據(jù)分布式電源的發(fā)電優(yōu)先模式和微網(wǎng)系統(tǒng)運(yùn)行的孤立和聯(lián)網(wǎng)模式制定了智能小區(qū)微網(wǎng)系統(tǒng)4種典型控制策略。從系統(tǒng)生產(chǎn)成本、交易成本、懲罰成本和污染物排放成本4種優(yōu)化目標(biāo)出發(fā),建立了含分布式電源的智能小區(qū)微網(wǎng)系統(tǒng)經(jīng)濟(jì)調(diào)度模型。最后采用改進(jìn)粒子群優(yōu)化算法求解經(jīng)濟(jì)調(diào)度模型,通過算例對(duì)比分析了智能小區(qū)微網(wǎng)系統(tǒng)在不同優(yōu)化模型、不同調(diào)度策略下的綜合效益。(3)此外,智能小區(qū)微網(wǎng)系統(tǒng)孤網(wǎng)運(yùn)行時(shí)的頻率控制對(duì)安全經(jīng)濟(jì)運(yùn)行有重要影響,本文針對(duì)具有較好調(diào)頻能力的微源,設(shè)計(jì)了電動(dòng)汽車參與系統(tǒng)調(diào)頻的控制策略。建立了響應(yīng)系統(tǒng)頻率偏差的電動(dòng)汽車調(diào)頻模型,并針對(duì)大規(guī)模電動(dòng)汽車,設(shè)計(jì)了系統(tǒng)調(diào)頻的電動(dòng)汽車參與模式,實(shí)現(xiàn)大規(guī)模電動(dòng)汽車的充放電管理；考慮雙饋感應(yīng)風(fēng)電機(jī)的動(dòng)態(tài)特性,設(shè)計(jì)了輔助頻率控制環(huán)節(jié),實(shí)現(xiàn)了對(duì)風(fēng)電機(jī)轉(zhuǎn)子動(dòng)能和槳距角的控制,使風(fēng)電機(jī)的功率輸出跟隨微網(wǎng)系統(tǒng)頻率變化�；诠戮W(wǎng)運(yùn)行的智能小區(qū)微網(wǎng)系統(tǒng),建立了智能小區(qū)微網(wǎng)系統(tǒng)孤網(wǎng)運(yùn)行下的頻率控制動(dòng)態(tài)模型,通過算例仿真,驗(yàn)證了所提出的調(diào)頻策略改善了智能小區(qū)微網(wǎng)系統(tǒng)的頻率調(diào)節(jié)性能,增強(qiáng)了抵御負(fù)荷沖擊的能力。
[Abstract]:The intelligent community micro-network system is a low-voltage power grid which organizes the distributed power supply, energy storage device and user load in the intelligent district. It supplies power to the residents' load of the intelligent district through the distribution network. Can not only be connected to the grid operation, but also island operation. In order to realize the energy coordination among distributed power supply, energy storage unit, load and distribution network, the intelligent community micro-grid system, as the access terminal of new power generation technology and energy supply mode, ensures the reliable power supply and economic operation of the system. It needs reasonable and feasible operation and control strategy of micro-net system in intelligent community. The economical dispatch of micro-net system in intelligent district is an important part in the process of operation and control of micro-grid system. The economical dispatching scheme is adopted to coordinate the output of each distributed power supply to meet the given load level and to minimize the operating cost of the system. The frequency control of the micro-net system in the intelligent district is an important guarantee for the safe, reliable and economical operation of the micro-net system under the isolated operation of the micro-net system in the intelligent district. It can follow the fluctuating load demand by adjusting the power output of the FM unit. In order to maintain the constant frequency of the micro-net system in the intelligent community, the system is in an economical and stable state of operation. This paper focuses on the economic dispatch of distributed power generation and intelligent community micro-grid system and the frequency modulation strategy under the operation of isolated network. The specific research contents are summarized as follows: (1) the research and development status of intelligent community micro-net system at home and abroad is described firstly, according to the technical characteristics, geographical environment and climatic conditions of intelligent community, The structure of the intelligent community micro-grid system with distributed power supply is designed, and the components and functions of the intelligent cell micro-grid system are described in detail. The mathematical models of each generation unit in the intelligent cell micro-grid system with distributed power are established, including wind turbine model, photovoltaic array model, battery model, and so on. Micro gas turbine model and electric vehicle model. (2) the distributed energy data of the system are processed according to the climate conditions (solar radiation intensity, wind speed, environment temperature, etc.) of the intelligent residential area. According to the power generation priority mode of distributed power supply and the isolation and networking mode of micro-grid system, four typical control strategies of intelligent cell micro-grid system are formulated. Based on the optimization objectives of system production cost, transaction cost, penalty cost and pollutant emission cost, the economic scheduling model of intelligent cell micro-net system with distributed power is established. Finally, the improved particle swarm optimization algorithm is used to solve the economic scheduling model, and the comprehensive benefits of the intelligent cell microgrid system under different optimization models and different scheduling strategies are analyzed by numerical examples. (3) in addition, The frequency control of the isolated network system in the intelligent district has an important influence on the safe and economical operation. Aiming at the micro-source with better frequency modulation ability, the control strategy of the electric vehicle participating in the system frequency modulation is designed in this paper. The frequency modulation model of electric vehicles responding to the system frequency deviation is established. For large-scale electric vehicles, the electric vehicle participation mode of system frequency modulation is designed to realize the charge and discharge management of large-scale electric vehicles. Considering the dynamic characteristics of doubly-fed induction wind machine, the auxiliary frequency control link is designed, which realizes the control of rotor kinetic energy and pitch angle of wind motor, and makes the power output of wind motor follow the frequency change of micro-grid system. Based on the isolated cell micro-grid system, the dynamic model of frequency control under the isolated network operation of the intelligent community micro-grid system is established, and a numerical example is given to simulate the dynamic model of the frequency control under the isolated network operation. It is verified that the proposed frequency modulation strategy improves the frequency regulation performance of the intelligent cell micro-grid system and enhances the ability of resisting load shock.
【學(xué)位授予單位】：長(zhǎng)沙理工大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2014
【分類號(hào)】：TM73

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本文編號(hào)：2465919