国产伦乱,一曲二曲欧美日韩,AV在线不卡免费在线不卡免费,搞91AV视频

當(dāng)前位置:主頁 > 科技論文 > 電力論文 >

低壓微網(wǎng)運行控制的下垂控制器研究與設(shè)計

發(fā)布時間:2018-11-01 11:32
【摘要】:隨著電網(wǎng)規(guī)模的擴(kuò)大,傳統(tǒng)大電網(wǎng)集中供電難以適應(yīng)用戶多元化的供電需求,促使了分布式發(fā)電技術(shù)的發(fā)展。但由于分布式電源的隨機性和不可控性,又限制了分布式電源的利用和使用效率。作為分布式電源的有效利用形式,微網(wǎng)既能充分利用分布式電源的優(yōu)勢,又能協(xié)調(diào)分布式發(fā)電和大電網(wǎng)之間的矛盾。微網(wǎng)的控制策略決定其在孤島和并網(wǎng)模式下的運行情況,并影響運行模式切換的平滑性。因此,確定合適的控制策略是實現(xiàn)微網(wǎng)穩(wěn)定運行的關(guān)鍵。 首先,本文分析了下垂控制基本原理和微網(wǎng)的下垂控制特性,給出了三相電壓型逆變器的數(shù)學(xué)模型及其LC濾波器參數(shù)的設(shè)計準(zhǔn)則,依據(jù)逆變器的數(shù)學(xué)模型和設(shè)計準(zhǔn)則分析了包含功率測量模塊、下垂特性控制模塊和電壓電流雙閉環(huán)控制模塊的逆變器下垂控制器,并給出了下垂控制器在低壓微網(wǎng)中的應(yīng)用。其次,本文在微網(wǎng)對等控制體系下的運行模式基礎(chǔ)上,給出了低壓微網(wǎng)運行控制策略。在孤島運行模式下,針對連接阻抗差異造成的功率分配不準(zhǔn)確以及負(fù)荷變化引起的電壓不穩(wěn)定問題,給出了改善無功分配精度、提高電壓穩(wěn)定性的自調(diào)節(jié)改進(jìn)下垂控制器設(shè)計;在模式切換狀態(tài)下,給出了同步并網(wǎng)下垂控制器設(shè)計,通過調(diào)節(jié)微電網(wǎng)輸出的電壓使得微電網(wǎng)與大電網(wǎng)的電壓幅值差、頻率差和相角差滿足并網(wǎng)要求,以實現(xiàn)微網(wǎng)在孤島和并網(wǎng)兩種模式之間的平滑切換。 最后,在Matlab/Simulink環(huán)境下搭建了低壓微網(wǎng)運行控制仿真系統(tǒng),分別對微網(wǎng)孤島模式運行、模式切換運行狀態(tài)進(jìn)行了仿真實驗,仿真結(jié)果分析表明所提出的低壓微網(wǎng)運行控制策略和所設(shè)計的自調(diào)節(jié)改進(jìn)下垂控制器及同步并網(wǎng)下垂控制器的有效性。
[Abstract]:With the expansion of power grid scale, traditional centralized power supply in large power grid is difficult to adapt to the diversified power supply demand of users, which promotes the development of distributed generation technology. However, due to the randomness and uncontrollability of distributed power, the utilization and efficiency of distributed power are limited. As a form of efficient utilization of distributed generation, microgrid can not only make full use of the advantages of distributed generation, but also can coordinate the contradiction between distributed generation and large power grid. The control strategy of microgrid determines its operation in isolated island and grid-connected mode, and affects the smoothness of switching operation mode. Therefore, to determine the appropriate control strategy is the key to realize the stable operation of the microgrid. Firstly, the basic principle of droop control and the droop control characteristics of microgrid are analyzed, and the mathematical model of three-phase voltage source inverter and the design criteria of LC filter parameters are given. According to the mathematical model and design criterion of inverter, the droop controller of inverter including power measurement module, droop characteristic control module and voltage and current double closed loop control module is analyzed, and the application of droop controller in low voltage microgrid is given. Secondly, based on the operation mode of micro-grid peer-to-peer control system, a low-voltage microgrid operation control strategy is presented. In the isolated operation mode, aiming at the inaccurate power distribution caused by the difference of the connection impedance and the voltage instability caused by the load variation, a self-regulating improved sagging controller is designed to improve the reactive power distribution accuracy and increase the voltage stability. In the mode switching state, the design of synchronous grid-connected droop controller is presented. By adjusting the output voltage of microgrid, the voltage amplitude difference, frequency difference and phase angle difference between microgrid and large power grid can meet the requirements of grid-connected. In order to realize the smooth switching between island and grid-connected modes. Finally, the simulation system of low-voltage microgrid operation control is built in Matlab/Simulink environment, and the simulation experiments are carried out for the operation of isolated island mode and mode switching state of microgrid. The simulation results show the effectiveness of the proposed low-voltage microgrid operation control strategy and the self-tuning improved droop controller and synchronous grid-connected droop controller.
【學(xué)位授予單位】:西南交通大學(xué)
【學(xué)位級別】:碩士
【學(xué)位授予年份】:2014
【分類號】:TM732

【參考文獻(xiàn)】

相關(guān)期刊論文 前10條

1 王成山;肖朝霞;王守相;;微網(wǎng)中分布式電源逆變器的多環(huán)反饋控制策略[J];電工技術(shù)學(xué)報;2009年02期

2 楊琦;馬世英;李勝;唐曉駿;李曉s,

本文編號:2303795


資料下載
論文發(fā)表

本文鏈接:http://lk138.cn/kejilunwen/dianlilw/2303795.html


Copyright(c)文論論文網(wǎng)All Rights Reserved | 網(wǎng)站地圖 |

版權(quán)申明:資料由用戶88883***提供,本站僅收錄摘要或目錄,作者需要刪除請E-mail郵箱bigeng88@qq.com
中文字幕日韩精品国产原创| 亚洲欧美成人自拍| 国产精九九 网站| 99国产精品就| 中文字幕亚洲一区二区三区四区五区 | 91精品视频完整| 国产精品网站欧洲| 成人网站在线观看网站在线| 欧美亚洲综合一| 日韩美女在线视频网站| 第一次呻吟亚洲| 青青草永久在线| 一本大道久久综合精品88影视| 色综合啪啪网| 日本精品69久久| 99久久精品国产99久久婷婷| 欧美又粗又长又刺激又爽的午夜| 亚洲神马天堂日韩女优电影| 黄视频在线| 国产美女洗澡| 久热婷婷| 国产开心五月基地| 亚洲国际免费AV| 精品国产涩色| 日本无码欧美激情视频二区| 久久精品最新资源| 在线一区二区青青| 大鸡巴操得好爽在线观看舔狗逼| 日韩久热久热| 中文字幕污吗AV片| 内射精液少妇后入| 妇女福利视频在线播放| 欧美,日韩,国产,综合视频区| 日韩欧美第十一页| 搞b视频免费观看| 淑女高潮第一页| 夜夜嗨亚洲首页| 亚洲第一色日韩| 午夜伦理神马久久久久久久| 国产欧美区第一页| 屄视频国产大胸|