本文選題：微網(wǎng) + 風(fēng)電　； 參考：《重慶大學(xué)》2014年碩士論文

【摘要】：隨著國(guó)民經(jīng)濟(jì)的不斷發(fā)展，能源需求快速增長(zhǎng)，在環(huán)境保護(hù)、能源枯竭等多重壓力下，分布式能源得到了廣泛關(guān)注。將分布式電源以微網(wǎng)的方式接入到大電網(wǎng)，既能減小分布式電源對(duì)配電網(wǎng)安全運(yùn)行的影響,又能實(shí)現(xiàn)分布式電源的“即插即用”，最大限度發(fā)揮分布式發(fā)電技術(shù)的效益和價(jià)值。但當(dāng)微網(wǎng)并網(wǎng)運(yùn)行時(shí)，因風(fēng)電等間歇性能源出力的隨機(jī)性和負(fù)荷投切的不確定性，導(dǎo)致微網(wǎng)與主網(wǎng)間的交換功率大幅波動(dòng)，影響主網(wǎng)潮流分布。將儲(chǔ)能系統(tǒng)應(yīng)用于微網(wǎng)，能夠起提供短時(shí)供電、電力調(diào)峰、改善微網(wǎng)電能質(zhì)量和提升微源性能等作用，是抑制隨機(jī)性微源輸出功率波動(dòng)的有效方法，具有較大的經(jīng)濟(jì)技術(shù)優(yōu)勢(shì)。 本文以含風(fēng)電和混合儲(chǔ)能系統(tǒng)的微網(wǎng)為研究對(duì)象，研究微網(wǎng)并網(wǎng)模式下混合儲(chǔ)能系統(tǒng)的控制策略。 首先，研究了風(fēng)力發(fā)電系統(tǒng)的詳細(xì)運(yùn)行模型及控制方法。以小型永磁直驅(qū)風(fēng)力發(fā)電系統(tǒng)代表間歇性微源，詳細(xì)研究了采用雙PWM變流電路的控制策略：電機(jī)側(cè)變流器采用轉(zhuǎn)速電流雙閉環(huán)控制，，并改進(jìn)了變步長(zhǎng)爬山搜索法，獲取最大風(fēng)能；電網(wǎng)側(cè)變流器采用電壓電流雙閉環(huán)控制，實(shí)現(xiàn)入網(wǎng)功率解耦控制和直流側(cè)電壓穩(wěn)定。 其次，研究了蓄電池-超級(jí)電容器混合儲(chǔ)能系統(tǒng)的詳細(xì)運(yùn)行模型及控制方法。混合儲(chǔ)能系統(tǒng)采用蓄電池DC/DC變換器+超級(jí)電容器DC/DC變換器+DC/AC變流器結(jié)構(gòu)，提出了基于變滑動(dòng)平均濾波法的混合儲(chǔ)能系統(tǒng)能量管理策略，即超級(jí)電容器承擔(dān)抑制微網(wǎng)內(nèi)功率波動(dòng)的高頻部分，蓄電池承擔(dān)微網(wǎng)內(nèi)功率波動(dòng)的平滑部分；設(shè)計(jì)了蓄電池雙向DC/DC變換器的有功電流雙閉環(huán)控制器，實(shí)現(xiàn)了蓄電池充放電控制；設(shè)計(jì)了超級(jí)電容器雙向DC/DC變換器的電壓電流雙閉環(huán)控制器，實(shí)現(xiàn)了直流側(cè)電壓穩(wěn)定和超級(jí)電容器充放電控制；設(shè)計(jì)了DC/AC變流器的PQ控制，使輸出功率快速響應(yīng)指令變化。 然后，提出了基于分層控制的微網(wǎng)混合儲(chǔ)能有功和無功控制策略。當(dāng)微網(wǎng)并網(wǎng)運(yùn)行時(shí)，抑制微網(wǎng)與配電網(wǎng)間的交換功率波動(dòng)，減小對(duì)配電網(wǎng)潮流分布的影響。 最后，基于Matlab/Simulink軟件搭建了永磁直驅(qū)風(fēng)力發(fā)電和混合儲(chǔ)能系統(tǒng)的仿真測(cè)試模型，并對(duì)其性能進(jìn)行測(cè)試。在此基礎(chǔ)上組建了微網(wǎng)混合儲(chǔ)能系統(tǒng)仿真實(shí)驗(yàn)平臺(tái)，在微網(wǎng)并網(wǎng)模式下進(jìn)行了仿真實(shí)驗(yàn)，仿真結(jié)果證明了控制策略的正確性和有效性。
[Abstract]:With the development of national economy and the rapid growth of energy demand, distributed energy has been paid more and more attention under the pressure of environmental protection and energy depletion. Connecting distributed generation to large power grid by microgrid can not only reduce the influence of distributed generation on the safe operation of distribution network, but also realize the "plug and play" of distributed generation, and give full play to the benefits and value of distributed generation technology. However, when the microgrid is connected to the grid, because of the randomness of the intermittent energy sources such as wind power and the uncertainty of load switching, the switching power between the microgrid and the main grid fluctuates greatly, which affects the power flow distribution of the main network. The application of energy storage system in microgrid can provide short-term power supply, power peak regulation, improve the power quality of micro-grid and improve the performance of micro-source. It is an effective method to restrain the fluctuation of output power of random micro-source, and has a great economic and technical advantage. In this paper, the control strategy of hybrid energy storage system with wind power and hybrid energy storage system is studied. Firstly, the detailed operation model and control method of wind power system are studied. In this paper, the control strategy of double PWM converter circuit is studied in detail with the small permanent magnet direct drive wind power generation system representative intermittent microsource. The motor side converter adopts the speed and current double closed loop control, and improves the variable step size mountain climbing search method. The maximum wind energy is obtained, and the voltage and current double closed loop control is used to realize the decoupling control of the power and the stability of the DC side voltage. Secondly, the detailed operation model and control method of battery-supercapacitor hybrid energy storage system are studied. The hybrid energy storage system adopts the DC/AC converter structure of the supercapacitor DC/DC converter of the storage battery DC/DC converter, and proposes the energy management strategy of the hybrid energy storage system based on the variable sliding average filter method. That is, the supercapacitor assumes the high frequency part of restraining the power fluctuation in the microgrid, the battery assumes the smooth part of the power fluctuation in the microgrid, and the dual closed loop controller of the active current of the battery bidirectional DC/DC converter is designed, which realizes the charge and discharge control of the battery. The voltage and current double closed loop controller of supercapacitor bi-directional DC/DC converter is designed to realize DC side voltage stability and supercapacitor charge and discharge control, and the PQ control of DC/AC converter is designed to make output power quickly respond to instruction change. Then, a hybrid active and reactive power control strategy based on hierarchical control is proposed. When the microgrid is connected to the grid, the exchange power fluctuation between the microgrid and the distribution network is restrained, and the influence on the power flow distribution of the distribution network is reduced. Finally, the simulation test model of permanent magnet direct drive wind power generation and hybrid energy storage system is built based on Matlab/Simulink software, and its performance is tested. On this basis, a simulation experiment platform for hybrid energy storage system with microgrid is set up, and the simulation experiment is carried out in grid-connected mode. The simulation results show that the control strategy is correct and effective.
【學(xué)位授予單位】：重慶大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2014
【分類號(hào)】：TM614

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