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The Independent Electricity System Operator (IESO) is a Crown corporation responsible for operating the electricity market and directing the operation of the bulk electrical system in the province of Ontario, Canada. It is one of eight Independent System Operators in North America. The IESO was established in April 1999 as the Independent Electricity Market Operator (IMO) under the Government of Ontario during the premiership of Mike Harris in preparation for deregulation of the province's electrical supply and transmission system. As part of government plans to privatize the assets of Ontario Hydro, the utility was split into 5 separate Crown corporations with the IMO responsible for directing the flow of electricity across the high-voltage, province-wide network owned by Hydro One and other transmission companies. It was also given the responsibility of managing and operating the competitive wholesale electricity market and working with neighbouring jurisdictions to manage an integrated North American electricity network. The IMO was renamed to the IESO in January 2005 as a result of the passage of Bill 100, which redefined the direction of deregulation and also led to the creation of the Ontario Power Authority. The IESO is an independent, not-for-profit entity. It is governed by a board whose directors are appointed by the government of Ontario, its fees and licences are set by the Ontario Energy Board and it operates independently of all participants in the electricity market. In April 2012, the Energy Minister of Ontario Christopher Bentley introduced legislation in Parliament to merge the Ontario Power Authority and IESO.〔http://www.thestar.com/news/queenspark/2013/05/24/possible_opa_merger_would_reduce_public_consultation_on_planning_oppositions_says.html〕 The merger was expected to take place in late 2012. After the Premier of Ontario Dalton McGuinty resigned in Fall 2012, the merger was postponed. As of January 1, 2015 the ''IESO'' and the Ontario Power Authority were merged. 〔http://www.ieso.ca/Pages/Media/Release.aspx?releaseID=6946〕 ==See also== * Ontario Hydro * Ontario Power Generation * Hydro One 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「Independent Electricity System Operator」の詳細全文を読む スポンサード リンク
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