Suzhou Electric Appliance Research Institute
期刊號： CN32-1800/TM| ISSN1007-3175

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基于切換通信網(wǎng)絡(luò)下孤島型微電網(wǎng)二次控制策略

來源：電工電氣發(fā)布時間：2021-03-26 14:26 瀏覽次數(shù)：841
基于切換通信網(wǎng)絡(luò)下孤島型微電網(wǎng)二次控制策略
 
李泓鋒，魏德仙
（華南農(nóng)業(yè)大學(xué) 工程學(xué)院，廣東 廣州 510642）
 
    摘 要：孤島型微電網(wǎng)的內(nèi)部電力單元通過無線網(wǎng)絡(luò)進(jìn)行通信，無線通信網(wǎng)絡(luò)易受擾動并且存在鏈路失效問題，導(dǎo)致通信拓?fù)洳粩嘧兓?，使得電力單元控制信號更新失敗。為了消除下垂控制?dǎo)致的電壓與頻率偏差，針對存在通信網(wǎng)絡(luò)切換的孤島電網(wǎng)，提出在切換拓?fù)湎鹿聧u型微電網(wǎng)的分布式二次控制策略。該策略是在下垂控制的基礎(chǔ)上增加切換拓?fù)涞那闆r以實現(xiàn)二次調(diào)節(jié)，并且形式簡單，可用構(gòu)造簡單的硬件來實現(xiàn)。在提出的二次控制作用下可以使頻率和電壓以指數(shù)的速度收斂至期望值，保證了有功功率分配性能。利用Matlab/Simulink仿真驗證了該二次控制策略的有效性和可行性。
    關(guān)鍵詞：孤島型微電網(wǎng)；二次控制；分布式控制；切換拓?fù)?/div>
    中圖分類號：TM734     文獻(xiàn)標(biāo)識碼：A     文章編號：1007-3175(2021)03-0001-07
 
Secondary Control Strategy of Islanded Micro-Grids Based on Switching Communication Network
 
LI Hong-feng, WEI De-xian
（College of Engineering, South China Agricultural University, Guangzhou 510642, China）
 
    Abstract: The internal power unit of the island micro-grid communicates through a wireless network, and the wireless communication network is susceptible to disturbances and has link failure problems, which leads to continuous changes in the communication topology and makes the power unit control signal update failure. In order to eliminate voltage and frequency deviations caused by droop control, a distributed secondary control strategy under switching topology is proposed for islanded micro-grids with communication network switching. The strategy is to increase the switching topology on the basis of droop control to achieve secondary adjustment, and the form is simple, and it can be implemented with simple hardware. Under the action of the proposed secondary control, the frequency and voltage can converge to the expected value at an exponential speed, which ensures the performance of active power distribution. This article uses Matlab/Simulink simulation to verify the effectiveness and feasibility of the secondary control strategy.
    Key words: islanded micro-grid; secondary control; distributed control; switching topology
 
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