根據國家設立的(de)有關(guan)機構、標準組(zu)(zu)織和權威電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)源(yuan)(yuan)社團組(zu)(zu)織、權威電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)源(yuan)(yuan)專家對"電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)源(yuan)(yuan)"(PowerSupply)的(de)定義：電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)源(yuan)(yuan)是以電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)力電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)子(zi)學為(wei)核心技(ji)術(shu)的(de)產(chan)品。"電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)源(yuan)(yuan)"是終端產(chan)品，"電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)力電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)子(zi)"是應用技(ji)術(shu)，"電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)源(yuan)(yuan)"產(chan)品是"電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)力電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)子(zi)"應用技(ji)術(shu)的(de)具(ju)體(ti)產(chan)品體(ti)現。電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)力電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)子(zi)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)源(yuan)(yuan)通常指采用電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)力電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)子(zi)技(ji)術(shu)的(de)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)源(yuan)(yuan)產(chan)品，是電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)力電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)子(zi)設備(bei)中重要組(zu)(zu)成成員(yuan)(為(wei)了簡(jian)便，下文中電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)力電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)子(zi)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)源(yuan)(yuan)以"電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)源(yuan)(yuan)"冠稱。)。
以電(dian)(dian)(dian)力電(dian)(dian)(dian)子(zi)學(xue)為核(he)心技術的(de)(de)電(dian)(dian)(dian)源(yuan)產(chan)業，隨著IT產(chan)業、CI產(chan)業、PC機廣泛應用(yong)而得(de)到(dao)突(tu)飛(fei)猛進的(de)(de)發(fa)展(zhan)(zhan)(zhan)。電(dian)(dian)(dian)源(yuan)產(chan)業是各類(lei)高科技產(chan)業發(fa)展(zhan)(zhan)(zhan)的(de)(de)基礎工業，所有的(de)(de)高精(jing)尖(jian)(jian)科技設備都需(xu)要電(dian)(dian)(dian)力電(dian)(dian)(dian)子(zi)電(dian)(dian)(dian)源(yuan)系統技術的(de)(de)配(pei)套和支持。隨著電(dian)(dian)(dian)力電(dian)(dian)(dian)子(zi)技術的(de)(de)發(fa)展(zhan)(zhan)(zhan)與綜合(he)利用(yong)，使(shi)電(dian)(dian)(dian)源(yuan)產(chan)業在航(hang)空、航(hang)天、宇航(hang)、艦船、自控(kong)自導、尖(jian)(jian)端武器、原子(zi)能、軍隊現代化以及(ji)醫學(xue)、通訊、交通、運輸、電(dian)(dian)(dian)力、電(dian)(dian)(dian)子(zi)、環保等領域得(de)到(dao)空前的(de)(de)發(fa)展(zhan)(zhan)(zhan)和應用(yong)，幾乎(hu)國民(min)經濟各行各業都與電(dian)(dian)(dian)力電(dian)(dian)(dian)子(zi)電(dian)(dian)(dian)源(yuan)產(chan)業密(mi)不可分。
近幾(ji)年，境(jing)外主要電(dian)源(yuan)供應商逐漸看好中國電(dian)力電(dian)子(zi)電(dian)源(yuan)市場的(de)巨大(da)潛(qian)力，紛紛把重點轉(zhuan)向(xiang)中國大(da)陸。在UPS電(dian)源(yuan)產品方面有山特、APC、愛(ai)克賽、梅蘭日蘭、三菱(ling)等;在通信開關(guan)電(dian)源(yuan)方面有愛(ai)立(li)信、美國的(de)Vicor、騰訊(xun)科技、朗訊(xun)、法(fa)國的(de)西門子(zi)、日本的(de)新電(dian)元等。臺(tai)(tai)灣地(di)區(qu)的(de)電(dian)源(yuan)生產廠(chang)(chang)商也在中國大(da)陸設廠(chang)(chang)生產，如臺(tai)(tai)達公司在東(dong)莞、上(shang)海(hai)、天(tian)津都設立(li)了工廠(chang)(chang)。
目前(qian)，跨國(guo)公司在(zai)國(guo)內電源市場占有依然強勁，如：艾默生(sheng)(Emerson)、APC、梅蘭(lan)(lan)日蘭(lan)(lan)、伊頓愛(ai)克賽，新(xin)近進入(ru)國(guo)內市場的有：荷蘭(lan)(lan)海泰克、ActivePower公司、施恩禧電氣(S&C)。
現(xian)在中(zhong)國本土也已形(xing)成(cheng)(cheng)一批(pi)超億(yi)元的電源(yuan)企業(ye)，如(ru)：中(zhong)興通訊、廈門科(ke)華、武(wu)漢洲際、煙臺東方電子信息集團等(deng)，他(ta)們有較強(qiang)的技(ji)術力(li)量和開發(fa)能力(li)。UPS電源(yuan)技(ji)術也向(xiang)著多功能、大功率、集成(cheng)(cheng)化(hua)的方向(xiang)發(fa)展，其(qi)中(zhong)UPS電源(yuan)行業(ye)中(zhong)的廈門科(ke)華、冠軍、科(ke)士(shi)達(da)、易事特(te)、捷益達(da)等(deng)一批(pi)民營企業(ye)領跑在國內UPS市場的前列(lie)。