摘要：在電廠、水泵站及鋼鐵工業(yè)中，風機、水泵類拖動系統(tǒng)每年要消耗大量電能。采用液力偶合器后，每年已為國家節(jié)電20億kW·h以上。但從節(jié)能角度看，對交流電動機進行變頻調(diào)速后產(chǎn)生的經(jīng)濟效益更為可觀。隨著國產(chǎn)高壓大功率變頻技術(shù)的日趨成熟及產(chǎn)品價格的不斷降低，大力推廣國產(chǎn)高壓變頻調(diào)速節(jié)能裝置意義重大。最后通過具體數(shù)據(jù)說明推廣使用高效率變頻凋速裝置的重要性。

關(guān)鍵詞：低效調(diào)速系統(tǒng)；液力偶合器；國產(chǎn)高壓變頻器

Generalizing Home Made High Voltage Variable Frequency Speed Adjusting Energy Saving Unit SUN Guo-qin． ZHOU DE-xian （1．Shanghai Institute of Technology，Shanghai 200235，China； 2．Drive Association of Shanghai Society of Electrical Engineering，Shanghai 200020，China）

Abstract:Drive systems for pumps and blowers consume huge amount of electric energy in power plant，pump station and steel industry as wel1．By using hydraulic fluid coupling technology more than two billion kW ·h has been saved annuMly，however，from energy saving perspective，applying AC speed control for AC motor will bring even more savings in electric energy．With the proven development of domestic high voltage large capacity AC drive contml technology and the cost advantage，it becomes more and more imperative to push forward for the technology in all ap—plications．The imperative necessity of generalizing high eficiency variable frequency speed adjusting energy saving u—nit was explained by data analysis．

Key words：low efi ciency speed control system；hydraulic fluid coupling；domestic high voltage AC converter

0 引 言

占工業(yè)電力拖動總量一半的風機和水泵等拖動系統(tǒng)均依靠檔板和閥門調(diào)節(jié)流量，每年要消耗大量的電能。如采用液力偶合器對風機、水泵進行調(diào)速，可達到節(jié)能目的。故自20世紀8O年代迄今，投入運行的液力偶合器近4 000臺左右，功率大多為300～3 200 kW，每年為國家節(jié)電20億kW ·h以上，已創(chuàng)造了較高的經(jīng)濟效益。隨著國產(chǎn)大功率變頻裝置的日趨成熟，北京、四川、山東等地已成功投產(chǎn)了300多臺。近年來，上海科達公司先后在山東、浙江、新疆等地推廣了2O多臺，已取得較好的節(jié)電效果。國產(chǎn)高壓變頻器與進口變頻器15項技術(shù)指標對比，7項明顯優(yōu)于進口產(chǎn)品（詳見表6），2005年曾獲得上?？萍疾┯[會銀獎。

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