變電站(所)在電源系統(tǒng)的工業(yè)企業(yè)是一個至關重要的因素。 他們接收,轉(zhuǎn)換和發(fā)送電能。根據(jù)能源和需求,變電站分為中央配電變電站電壓為110-500kV；主要降壓變電所電壓為110-220/6-10-35kV； 深入口變電站為110-330/6-10Kv；二次變電站的電壓為6-10Kv；車間變電所電壓為6-10/0.38-0.66kV。在主要的降壓變電所,電源能量轉(zhuǎn)化電壓為110-220kV，通常使用6-10Kv(有時為35kV變電所)的電壓分配給企業(yè)和被用來滿足高壓服務。
　　中央配電變電站從電力系統(tǒng)接收能量并分發(fā)它(不包括或者包括部分變換) 給企業(yè)不同區(qū)域，通過空中電纜和地下電纜線路電壓為110-220kV。 中央分配變電站站不同于主配電變電它是一個更強大的電力設施,它的電壓大部分在110-220kV的電壓。它可以簡化初級電壓、中級電壓或地區(qū)的開關電路。中低級別變電站改造能量來自6-10kv的電壓,它的二次側(cè)電壓為380/220或660/380。
　　升壓變壓器變電站用于將電廠產(chǎn)生的能量轉(zhuǎn)化使發(fā)電機產(chǎn)生的電壓升高,從而有效地減少在遠距離輸電能量的損失轉(zhuǎn)換器變電站的目的是為了將直流轉(zhuǎn)換成交流(有時相反)和轉(zhuǎn)換成能量時改變頻率。轉(zhuǎn)換器變電站的能量轉(zhuǎn)換是用半導體整流器來變頻的。帶半導體整流器的轉(zhuǎn)化器變電站是最經(jīng)濟的。6-10kV的配電變電站主要依據(jù)主配電變電站(有時依據(jù)中央配電變電站)。110-220kV變電站系統(tǒng)區(qū)域的劃分時，根據(jù)變電站設備功能劃分時是有學問的，6-10kV的變電站設備劃分在變電站的入口。
Substations are a vital element in a power supply system of industrial enterprises．They serve to receive ，convert and distribute electric energy .Depending on power and purpose ,the substations are divided into central distribution substations for a voltage of 110-500kV;main step-down substations for110-220/6-10-35kV;deep entrance substations for 110-330/6-10Kv;distribution substations for 6-10Kv;shop transformer substations for 6-10/0.38-0.66kV.At the main step-down substations, the energy received from the power source is transformed from 110-220kV usually to 6-10kV(sometimes 35kV) which is distributed among substations of the enterprise and is fed to high-voltage services.
Central distribution substations receive energy from power systems and distribute it (without or with partial transformation) via aerial and cable lines of deep entrances at a voltage of 110-220kV over the enterprise territory .Central distribution substation differs from the main distribution substation in a higher power and in that bulk of its power is at a voltage of 110-220kV;it features simplified switching circuits at primary voltage; it is fed from the power to an individual object or region .Low-and medium-power shop substations transform energy from 6-10kV to a secondary voltage of 380/220 or 660/380.
Step-up transformer substations are used at power plants for tra