發(fā)布時(shí)間：2018-07-06 08:29

  本文選題：雙向功率控制器 + 混合儲(chǔ)能��； 參考：《華北水利水電大學(xué)》2017年碩士論文

【摘要】：人類社會(huì)的發(fā)展進(jìn)步建立在能源利用之上,從遠(yuǎn)古時(shí)代到現(xiàn)代文明也是能源的利用發(fā)展史,進(jìn)入21世紀(jì)以來化石能源危機(jī)、大量使用化石能源造成的嚴(yán)重環(huán)境污染問題、引起全球安全局勢(shì)緊張和全球氣候變化等問題日益突出,這對(duì)既有的能源供給結(jié)構(gòu)、能源利用模式提出了發(fā)展要求。合理開發(fā)高效的利用清潔能源是能源發(fā)展的必由之路,對(duì)新能源規(guī)�；l(fā)展對(duì)電力傳輸、能源供需廣域平衡需求不斷加深。新的能源形勢(shì)促進(jìn)能源技術(shù)的革命,帶動(dòng)了輸電方式的改變。風(fēng)力發(fā)電是可再生清潔能源發(fā)電中的一種具有極大開發(fā)價(jià)值的可持續(xù)發(fā)展綠色能源,而開發(fā)利用風(fēng)電最有效的方式是通過規(guī)�；L(fēng)電場(chǎng)并網(wǎng)運(yùn)行。但是風(fēng)力發(fā)電具有很多不同于其他能源發(fā)電的特點(diǎn)。風(fēng)能不可控造成風(fēng)電是一種隨機(jī)性較強(qiáng)的不同于傳統(tǒng)能源的電力,風(fēng)電接入電網(wǎng)后,對(duì)電網(wǎng)的電壓頻率安全穩(wěn)定運(yùn)行產(chǎn)生不利影響。因此,研究風(fēng)電并網(wǎng)運(yùn)行技術(shù),平抑風(fēng)電功率波動(dòng)以提高風(fēng)電并網(wǎng)電能質(zhì)量具有重要的現(xiàn)實(shí)意義和價(jià)值。本文提出了風(fēng)電場(chǎng)通過柔性直流輸電并網(wǎng)模型,并在直流母線并聯(lián)混合儲(chǔ)能裝置,以達(dá)到平抑風(fēng)電功率波動(dòng),提高風(fēng)電并網(wǎng)交流系統(tǒng)母線電壓頻率穩(wěn)定的目的。主要內(nèi)容包括:1.首先對(duì)蓄電池和超級(jí)電容的拓?fù)淠Ｐ瓦M(jìn)行了研究,并討論了混合儲(chǔ)能系統(tǒng)的主體結(jié)構(gòu),確定了混合儲(chǔ)能系統(tǒng)電路結(jié)構(gòu)及其連接方式,并在MATLAB仿真軟件中搭建了仿真模型。該模型通過雙向功率變換器控制儲(chǔ)能系統(tǒng)的功率傳輸。通過仿真驗(yàn)證該并聯(lián)結(jié)構(gòu)滿足設(shè)計(jì)要求,同時(shí)具備兩種單一儲(chǔ)能的優(yōu)勢(shì)。2.介紹了柔性直流輸電技術(shù)的結(jié)構(gòu),根據(jù)柔性直流輸電的數(shù)學(xué)模型,分析了柔性直流輸電技術(shù)的原理,為了設(shè)計(jì)控制器的需要,根據(jù)坐標(biāo)變換導(dǎo)出電壓源換流器在dq坐標(biāo)下的動(dòng)態(tài)微分方程表達(dá)式。根據(jù)H_∞控制理論,設(shè)計(jì)了兩端換流站和逆變站控制器,并搭建了仿真模型。3.結(jié)合混合儲(chǔ)能和柔性直流輸電的優(yōu)點(diǎn),提出和設(shè)計(jì)了風(fēng)電場(chǎng)通過柔性直流輸電并網(wǎng),并在直流母線并聯(lián)混合儲(chǔ)能裝置的風(fēng)電并網(wǎng)模型,并在仿真軟件中實(shí)現(xiàn)。仿真表明,在VSC-HVDC直流輸電線路配置與風(fēng)力發(fā)電機(jī)組容量相匹配的高效儲(chǔ)能裝置,通過控制器及時(shí)跟蹤風(fēng)電輸出功率波動(dòng)性補(bǔ)償功率,安裝在柔性直流輸電系統(tǒng)直流母線上的儲(chǔ)能裝置能夠有效削弱因風(fēng)能隨機(jī)波動(dòng)帶來的風(fēng)電功率波動(dòng)給并網(wǎng)側(cè)交流電網(wǎng)母線電壓、頻率造成的不利影響,提高了交流系統(tǒng)電網(wǎng)的安全穩(wěn)定運(yùn)行的能力。因此,仿真模型關(guān)于風(fēng)電場(chǎng)通過在直流輸電線路并聯(lián)混合儲(chǔ)能裝置的柔性直流輸電并網(wǎng)模型可以滿足電網(wǎng)對(duì)風(fēng)電并網(wǎng)電源在電壓、功率波動(dòng)范圍的要求,減小隨機(jī)性對(duì)電網(wǎng)的帶來的不利影響,提高并網(wǎng)交流母線電壓和頻率的穩(wěn)定性提高了風(fēng)電場(chǎng)的運(yùn)行效率。
[Abstract]:The development and progress of human society is based on the utilization of energy. From ancient times to modern civilization, it is also the history of the development of energy utilization. Since the beginning of the 21st century, the crisis of fossil energy and the serious environmental pollution caused by the extensive use of fossil energy have been brought about. The problems such as global security tension and global climate change are becoming more and more prominent, which puts forward the development requirements for the existing energy supply structure and energy utilization mode. Rational development and efficient utilization of clean energy is the only way for energy development. The new energy situation promotes the revolution of energy technology and drives the change of transmission mode. Wind power generation is a kind of sustainable development green energy with great development value in renewable clean energy power generation, and the most effective way to develop and utilize wind power is to run on the grid through large-scale wind farm. But wind power generation has many different characteristics from other energy sources. Wind power is a kind of power which is different from the traditional energy because of the uncontrollable wind power. When wind power is connected to the power grid, it will have a negative impact on the safe and stable operation of the voltage frequency of the power network. Therefore, it is of great practical significance and value to study the technology of wind power grid operation and to stabilize the fluctuation of wind power in order to improve the quality of wind power. In this paper, a model of wind farm connected by flexible direct current transmission is proposed, and a hybrid energy storage device is connected in parallel with DC busbar to stabilize the fluctuation of wind power and to improve the voltage stability of the bus voltage in the wind power grid connected AC system. The main contents include: 1. Firstly, the topology model of battery and super capacitor is studied, and the main structure of hybrid energy storage system is discussed. The circuit structure and connection mode of hybrid energy storage system are determined, and the simulation model is built in MATLAB simulation software. The model controls the power transmission of the energy storage system through a two-way power converter. Simulation results show that the parallel structure meets the design requirements and has two advantages of single energy storage. The structure of flexible direct current transmission technology is introduced. According to the mathematical model of flexible direct current transmission, the principle of flexible direct current transmission technology is analyzed. According to coordinate transformation, the expression of dynamic differential equation of voltage source converter in dq coordinate is derived. According to the theory of H _ 鈭，

本文編號(hào)：2102155