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配電網(wǎng)電力電子變壓器技術(shù)綜述

來(lái)源：電工電氣發(fā)布時(shí)間：2021-07-20 11:20 瀏覽次數(shù)：1005

配電網(wǎng)電力電子變壓器技術(shù)綜述

張?jiān)诿罚瑒⑵G

(金川集團(tuán)股份有限公司，甘肅金昌 737100)

摘要：為彌補(bǔ)傳統(tǒng)電力變壓器在智能電網(wǎng)中的不足，基于電力電子技術(shù)的電力電子變壓器 (Power Electronic Transformer，PET) 得到人們的大量關(guān)注。介紹了目前國(guó)內(nèi)外 PET 相關(guān)的主要技術(shù)，對(duì) PET 拓?fù)浣Y(jié)構(gòu)做了對(duì)比與分析。經(jīng)分析討論認(rèn)為，配電網(wǎng)中 PET 的拓?fù)浣Y(jié)構(gòu)應(yīng)當(dāng)根據(jù)實(shí)際情況靈活配置，模塊化多電平變流器型三級(jí)拓?fù)浣Y(jié)構(gòu)兼具結(jié)構(gòu)簡(jiǎn)單和易于擴(kuò)展的優(yōu)點(diǎn)，是值得推廣的一種拓?fù)浣Y(jié)構(gòu)。三級(jí)型電力電子變壓器拓?fù)浣Y(jié)構(gòu)既可以實(shí)現(xiàn)傳輸功率的可控目標(biāo)，又可以為分布式電源和直流負(fù)荷提供方便的接口，是 PET 未來(lái)的發(fā)展方向。指出多樣化的功能和靈活的控制特性使得電力電子變壓器在未來(lái)配電網(wǎng)中的應(yīng)用具有廣闊的發(fā)展空間。

關(guān)鍵詞：配電網(wǎng)；電力電子變壓器；拓?fù)浣Y(jié)構(gòu)；關(guān)鍵技術(shù)

中圖分類(lèi)號(hào)：TM41 文獻(xiàn)標(biāo)識(shí)碼：A 文章編號(hào)：1007-3175(2021)07-0005-07

Review of Power Electronic Transformer Applied in Distribution Network

ZHANG Zai-mei, LIU Yan

（Jinchuan Group Co., Ltd, Jinchang 737100, China）

Abstract: In order to compensate deficiencies of traditional power transformers in smart grids, power electronic transformers (PET) based on power electronic technology have received a lot of attention. In this paper, the main relevant technologies of PET have been introduced,and its topological structures have been compared and analyzed. After the analysis and discussion, it is concluded that PET topological structures of the distribution grid should be equipped flexibly according to the reality. The three-state topology of modular multilevel converter has advantages both of simple structure and great expansion consequently worthy promoting. The three-state topology of power electronic transformer not only manages to control transmission power, but also provides flexible interfaces for distributed generations and DC loads,which conforms to the developing trend of PET. In conclusion, PET will be applied extensively to the distribution grid in the future because

of its various functions and flexible controlling.

Key words: distribution grid; power electronic transformer; topology; key technology

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