By Reem Shamseddine

KHOBAR, Saudi Arabia, Sept 18 (Reuters) - South Korean group Hyundai Heavy Industries 009540.KS submitted the lowest bid to build a new oil-fired power plant in Jeddah for state-controlled Saudi Electricity Co 5110.SE , industry sources said on Tuesday.

A Hyundai Heavy Industries spokesman said the company was in the process of bidding for the Jeddah South power plant and declined to disclose additional detail.

Daelim Industrial 000210.KS was second lowest while Samsung C&T 000830.KS was third. A consortium of Doosan Heavy Industries 034020.KS and Hyundai Engineering and Construction

000720.KS came fourth while French group Alstom ALSO.PA and Saudi Arabia's Bemco were fifth. A consortium of Germany's Siemens SIEGn.DE , Japan's Marubeni 8002.T and Turkey's Gama submitted the highest price for the 2,400 megawatt Jeddah South plant expected to be completed by 2016.

SEC revised up its investment plan to 452 billion riyals ($121 billion) over the next decade to meet rising domestic demand boosted by continued economic boom. ($1 = 3.7501 Saudi riyals)

(Additional reporting by Joyce Lee in Seoul; Editing by Dan Lalor)

(Reem.Shamseddine@thomsonreuters.com; +96638592898; Reuters Messaging: reem.shamseddine.thomsonreuters.com@reuters.net)

Keywords: HYUNDAIHEAVYINDUSTRIES SAUDI/POWERPLANT