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Availability Based Tariff (ABT) is a frequency based pricing mechanism applicable in India for unscheduled electric power transactions. The ABT falls under electricity market mechanisms to charge and regulate power to achieve short term and long term network stability as well as incentives and dis-incentives to grid participants against deviations in committed supplies as the case may be.〔(【引用サイトリンク】accessdate=14 August 2014 )〕 == Introduction == ABT Mechanism in Electricity sector in India is adopted since the year 2000 and in a few other countries for pricing bulk power across various stakeholders. ABT concerns itself with the tariff structure for bulk power and is aimed at bringing about more responsibility and accountability in power generation and consumption through a scheme of incentives and disincentives. As per the notification, ABT was initially made applicable to only central generating stations having more than one SEB/State/Union Territory as its beneficiary. Through this scheme, the Central Electricity Regulatory Commission (CERC) looks forward to improve the quality of power and curtail the following disruptive trends in power sector: *Unacceptably rapid and high frequency deviations (from 50 Hz) causing damage and disruption to large scale industrial consumers *Frequent grid disturbances resulting in generators tripping, power outages and power grid disintegration. The ABT scheme has now been expanded to cover the Intrastate systems as well.〔(【引用サイトリンク】accessdate=14 August 2014 )〕 The power generation or grid capacity has increased substantially in last fifteen years particularly after the Electricity Act 2003 by introduction of competition and unbundling of vertically integrated utilities (SEBs) in to separate entities in charge of electricity generation, electricity transmission, and electricity distribution. Deregulation and competition has facilitated participation of private sector on large scale in electricity generation, transmission and distribution. Of late, Indian electricity sector is transforming from perennial deficit to surplus electricity availability.〔(【引用サイトリンク】title= Open Access in Indian power sector )〕 The volume of purchased electricity that could not be transmitted to the buyers due to transmission lines congestion is only 0.3% of the total electricity consumed in the financial year 2013-14.〔(【引用サイトリンク】accessdate=4 October 2015 )〕 It means that the actual power deficit in India is less than 1% excluding non-price related (under priced) electricity demand. ABT/DSM mechanism needs improvements to address the requirements of all stake holders (including final electricity consumers) for encouraging least cost electricity generation / tariff based on demand verses availability in the grid.〔(Electricity online trading in India )〕〔(【引用サイトリンク】title= Integrating European Electricity Markets )〕 There is a need of well represented Electric Reliability Organization to involve all the grid participants for framing guidelines for power system operation and accreditation which is presently looked after by the CEA 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「Availability-based tariff」の詳細全文を読む スポンサード リンク
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