【摘要】：海島上風(fēng)能、太陽能等可再生能源資源豐富，但其具有間歇性和波動(dòng)性的特點(diǎn)，給系統(tǒng)電源規(guī)劃和運(yùn)行調(diào)度帶來很大困難。柴油發(fā)電機(jī)出力雖然穩(wěn)定但發(fā)電成本較高且尾氣排放嚴(yán)重污染環(huán)境。因此，獨(dú)立海島微網(wǎng)設(shè)計(jì)中如何合理配置各種分布式電源容量以保證在滿足供電可靠率的基礎(chǔ)上，盡可能減少設(shè)備投資成本，提高可再生能源利用率，降低柴油發(fā)電機(jī)燃料費(fèi)用，成為亟待解決的問題。從日時(shí)間尺度來看，，如何在風(fēng)、光、負(fù)荷較強(qiáng)隨機(jī)波動(dòng)下優(yōu)化柴油機(jī)出力、合理安排電源備用，使微網(wǎng)既能較好消納風(fēng)光負(fù)荷波動(dòng)性，又能實(shí)現(xiàn)最優(yōu)經(jīng)濟(jì)運(yùn)行是實(shí)際面臨的另一個(gè)關(guān)鍵問題。 目前，我國近岸海島的供電主要依靠海底電纜連接陸上電網(wǎng)。海上捕魚、挖沙等作業(yè)極易對(duì)海纜造成破壞，而海纜的故障定位和檢修難度大、作業(yè)時(shí)間長，很難快速恢復(fù)供電。因此，實(shí)現(xiàn)海島電網(wǎng)并網(wǎng)運(yùn)行和孤網(wǎng)運(yùn)行之間平滑切換，保證長島電網(wǎng)孤網(wǎng)方式下的穩(wěn)定運(yùn)行，避免類似故障造成的停電損失，提高長島地區(qū)的供電可靠性，具有重大的意義。 論文首先介紹HOMER軟件和數(shù)學(xué)解析法分別配置海島微網(wǎng)分布式電源容量的方法。數(shù)學(xué)解析法尋優(yōu)速度較快，是本文采用的主要方法，其充分考慮各種系統(tǒng)線性約束條件，方便進(jìn)行靈敏度分析，但難以處理復(fù)雜非線性約束。 然后研究了考慮風(fēng)、光和負(fù)荷預(yù)測(cè)誤差的經(jīng)濟(jì)運(yùn)行問題。本文假設(shè)預(yù)測(cè)誤差滿足正態(tài)分布，建立了機(jī)會(huì)約束模型，以儲(chǔ)能作為備用彌補(bǔ)實(shí)際值與預(yù)測(cè)值之間的不一致，合理安排儲(chǔ)能出力和剩余能量水平，優(yōu)化柴油機(jī)出力，實(shí)現(xiàn)最優(yōu)經(jīng)濟(jì)運(yùn)行。 論文最后介紹了海島微網(wǎng)并網(wǎng)、孤網(wǎng)和并/孤網(wǎng)平滑切換控制策略，以實(shí)現(xiàn)并網(wǎng)時(shí)平抑聯(lián)絡(luò)線功率波動(dòng)、孤網(wǎng)時(shí)維持系統(tǒng)供電質(zhì)量和海底電纜故障時(shí)供電不中斷的目的，保證電網(wǎng)在各種工況下的安全穩(wěn)定運(yùn)行。
[Abstract]:The island is rich in renewable energy resources such as wind energy and solar energy, but it has the characteristics of intermittency and volatility, which brings great difficulties to the power source planning and operation scheduling of the system. Although the output of diesel generator is stable, the cost of power generation is high and the exhaust gas pollutes the environment seriously. Therefore, in the design of the independent island microgrid, how to reasonably configure the capacity of various distributed power sources to ensure that, on the basis of satisfying the reliability of power supply, the investment cost of equipment is reduced as much as possible, and the utilization rate of renewable energy is improved, Reducing the cost of diesel generator fuel has become an urgent problem. According to the daily time scale, how to optimize the diesel engine output under the strong random fluctuation of wind, light and load, and reasonably arrange the power supply reserve, so that the microgrid can absorb the fluctuation of wind and wind load better, The realization of optimal economic operation is another key problem in practice. At present, the power supply of the coastal islands mainly depends on submarine cables to connect to the land power grid. Fishing and sand dredging on the sea can easily damage the submarine cable, but the fault location and maintenance of the submarine cable is difficult, the working time is long, and it is difficult to restore power supply quickly. Therefore, it is of great significance to realize the smooth switching between the island power grid and the isolated network operation, to ensure the stable operation of the long Island power grid under the isolated network mode, to avoid the power failure loss caused by similar faults, and to improve the power supply reliability in the long Island area. In this paper, HOMER software and mathematical analytic method are introduced to configure the capacity of distributed power generation of island microgrid. The mathematical analytical method is the main method used in this paper, which fully considers the linear constraints of various systems and is convenient for sensitivity analysis, but it is difficult to deal with complex nonlinear constraints. Then, the economic operation problem considering wind, light and load forecasting errors is studied. On the assumption that the prediction error satisfies the normal distribution, an opportunistic constraint model is established, in which the storage energy is used as a reserve to compensate for the inconsistency between the actual value and the predicted value, and the storage capacity and the residual energy level are reasonably arranged to optimize the diesel engine output. To achieve optimal economic operation. Finally, the paper introduces the control strategy of island microgrid, isolated network and parallel / isolated network smooth switching, so as to stabilize the power fluctuation of tie line, maintain the quality of power supply in isolated network and keep the power supply uninterrupted in the event of submarine cable fault. To ensure the safe and stable operation of the power grid under various operating conditions.
【學(xué)位授予單位】：華中科技大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2014
【分類號(hào)】：TM732

【相似文獻(xiàn)】

相關(guān)期刊論文 前10條

1 李鵬;張玲;王偉;楊希磊;趙義術(shù);;微網(wǎng)技術(shù)應(yīng)用與分析[J];電力系統(tǒng)自動(dòng)化;2009年20期

2 韓奕;張東霞;胡學(xué)浩;梁才浩;程軍照;梁惠施;;中國微網(wǎng)標(biāo)準(zhǔn)體系研究[J];電力系統(tǒng)自動(dòng)化;2010年01期

3 撖奧洋;鄧星;文明浩;李惠宇;陳曉燕;;高滲透率下大電網(wǎng)應(yīng)對(duì)微網(wǎng)接入的策略[J];電力系統(tǒng)自動(dòng)化;2010年01期

4 楊仁花;黃偉;關(guān)麗;劉令富;;微網(wǎng)結(jié)構(gòu)和運(yùn)行控制[J];電網(wǎng)與清潔能源;2010年01期

5 王志霞;張會(huì)民;田偉;;微網(wǎng)研究綜述[J];電氣應(yīng)用;2010年06期

6 魯貽龍;王斌;曹祖亮;;儲(chǔ)能系統(tǒng)改善微網(wǎng)動(dòng)態(tài)性能的研究[J];湖北工業(yè)大學(xué)學(xué)報(bào);2010年01期

7 牛銘;黃偉;郭佳歡;蘇玲;;微網(wǎng)并網(wǎng)時(shí)的經(jīng)濟(jì)運(yùn)行研究[J];電網(wǎng)技術(shù);2010年11期

8 馬力;;混合系統(tǒng)微網(wǎng)控制策略分析[J];電力系統(tǒng)及其自動(dòng)化學(xué)報(bào);2010年06期

9 王錫琳;;含有光伏電源的微網(wǎng)綜述[J];安徽電子信息職業(yè)技術(shù)學(xué)院學(xué)報(bào);2011年02期

10 歐陽

本文編號(hào)：2251752