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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(lái)源：電工電氣發(fā)布時(shí)間：2021-03-26 14:26 瀏覽次數(shù)：1093

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(guò)無(wú)線網(wǎng)絡(luò)進(jìn)行通信，無(wú)線通信網(wǎng)絡(luò)易受擾動(dòng)并且存在鏈路失效問(wèn)題，導(dǎo)致通信拓?fù)洳粩嘧兓沟秒娏卧刂菩盘?hào)更新失敗。為了消除下垂控制導(dǎo)致的電壓與頻率偏差，針對(duì)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(shí)現(xiàn)二次調(diào)節(jié)，并且形式簡(jiǎn)單，可用構(gòu)造簡(jiǎn)單的硬件來(lái)實(shí)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(yàn)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(hào)：TM734 文獻(xiàn)標(biāo)識(shí)碼：A 文章編號(hào)：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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基于切換通信網(wǎng)絡(luò)下孤島型微電網(wǎng)二次控制策略