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Availability-based tariff

About: Availability-based tariff is a research topic. Over the lifetime, 72 publications have been published within this topic receiving 513 citations.


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Journal ArticleDOI
TL;DR: In this paper, the authors investigated the market structure and competitiveness in the Wholesale Electricity Market in India (WEMI) and suggested that market power of firms may be part of the reason for the increase in electricity prices in WEMI.
Abstract: The electricity reforms were initiated in India with the objective of promoting competition in the electricity market. In order to promote competition, the Electricity Act 2003 was enacted and various policy initiatives were taken by the Government of India. Central Electricity Regulatory Commission (CERC) also facilitated competition through the regulatory framework of availability based tariff, Indian Electricity Grid Code, open access in inter-state transmission, inter-state trading and power exchanges. Despite these initiatives, electricity prices increased in the Wholesale Electricity Market in India (WEMI). This paper analyses the market structure and competitiveness in the WEMI. There are, of course, various potential reasons for the rise in the electricity price. This paper seeks to investigate, if market power was one of the reasons for increase in market prices. Concentration ratio, Herfindahl–Hirschman index, Supply Margin Assessment, and Residual Supply Index have been used to measure market power. This paper also uses the price–cost mark-up to examine, if exercise of market power led to higher margins. The analysis suggests that market power of firms may be part of the reason for the increase in electricity prices in WEMI. The study suggests various measures to increase competition in the WEMI.

86 citations

Journal ArticleDOI
TL;DR: In this paper, a new formulation to maximize the operational profit of a micro grid connected hybrid system having wind farm and pumped storage unit for a day ahead electricity market in a frequency based pricing environment is presented.
Abstract: This paper presents a new formulation to maximize the operational profit of a micro grid connected hybrid system having wind farm and pumped storage unit for a day ahead electricity market in a frequency based pricing environment. Under frequency based pricing mechanism in India, the pricing for energy exchange is adaptive as per Availability Based Tariff (ABT) rate structure and the payment for deviation from schedule, i.e. Unscheduled Interchange (UI) charge is inversely proportional to the prevailing grid frequency. In this work, a small power system is considered as micro grid and it is expected that the hybrid system connected with the micro grid has a role to play to maintain the micro grid frequency. The pump storage hydro plant is operated to serve the dual role of minimizing the UI flow and maximizing the system economy by participating in frequency control based on energy price. The uncertainties in wind power prediction and loads are considered. The optimum operating schedule of PSH unit in coordination with wind farm is investigated. The optimization is performed by utilizing the water storage availability of pump storage hydro unit. An optimization algorithm is proposed and solved using Artificial Bee Colony algorithm. The solution of the proposed approach gives the strategies to be followed by the hybrid system to operate its pump storage unit. The effect of the initial storage water volume on the performance of the hybrid system has also been investigated. It reveals that the PSH units would not operate simply to compensate for the short fall or the surplus generation of the wind units in a frequency based pricing system. Rather, the pump storage units should take the advantage of the low price periods to maximize the profit of the hybrid system. The hourly energy management scenarios of the hybrid system with the micro grid are reported and the numerical case studies on PSH plant scheduling demonstrate the effectiveness of the proposed approach.

40 citations

Proceedings ArticleDOI
10 Jun 2004
TL;DR: This paper discusses an unconventional concept- tariff linked to frequency which has been introduced in India at the inter-state level through the three-part tariff for central generating stations, the so called availability based tariff (ABT).
Abstract: This paper discusses an unconventional concept- tariff linked to frequency. This new concept has been introduced in India at the inter-state level, starting from mid 2002, through the three-part tariff for central generating stations, the so called availability based tariff (ABT). In this scheme overdrawals are costly when the grid is short on generation, and are cheap when the grid has surplus generating capacity. Similarly any oversupply is paid for at a high rate when frequency is below 50.0 Hz and at a low rate when the frequency is above 50.0 Hz. Underdrawal and undersupply also get the same treatment.

37 citations

Proceedings ArticleDOI
13 Jul 2003
TL;DR: In this paper, an automatic balance service market that can act as an effective tool for system frequency control in deregulated power systems is proposed, which combines the presently existing manual balancing mechanism, prevailing in some countries, with the conventional automatic generation control, within a bid-based market structure.
Abstract: This paper presents the design of an automatic balance service market that can act as an effective tool for system frequency control in deregulated power systems. The proposed scheme combines the presently existing manual balancing mechanism, prevailing in some countries, with the conventional automatic generation control, within a bid-based market structure. The participants in this frequency regulation service market are assumed to be responding to frequency linked price signals sent out by the system operator. Optimization models for settlement of the regulation markets have been proposed and dynamic simulation show satisfactory performance of the market.

33 citations

Journal ArticleDOI
TL;DR: In this paper, a decision support system (DSSDSS) under Availability Based Tariff Regime for operation, scheduling and optimization of the Sewa Hydro Electric Electric Plant (SHEP) situated in Jammu & Kashmir state of India was developed to assist the SHEP operations engineers in order to improve the operational efficiency of the SWP and to make optimal or near optimal operational and trading decisions while meeting the constraints.
Abstract: In operating a complex hydroelectric system in a competitive market the operational as well as the financial risks are high. Decision makers and operators unarmed with rigorous analysis tools and techniques could cause their organization to pay dearly for their decisions. Traditionally the main objective of the system operator was to secure a stable supply of electric power to meet the local system load demand while meeting the system physical and operational constraints. The major driving force in making operating decisions was to ensure the availability of sufficient energy and capacity to meet the system demand while also meeting the non power requirements and operational constraints. This article presents Decision support system (DSS) under Availability Based Tariff Regime for operation, scheduling and optimization of the Sewa Hydro Electric Plant (SHEP) situated in Jammu & Kashmir state of India was developed to assist the SHEP operations engineers in order to improve the operational efficiency of the Sewa hydro system and to make optimal or near optimal operational and trading decisions while meeting the constraints. Use of the software can result in significant improvements to daily energy production and revenues. The hydro power plant historical operation and production is analyzed and baseline methodology of the historical operation is established. Based on the implementation of DSS on actual project site (SHEP), the DSS has demonstrated to be stable and managed to give reliable decisions. The optimal exploitation of the available hydro resources in the State combined with the minimization of the environmental impacts would not only meet the State׳s demand, but will supply power to the Northern grid to boost the overall development of the State. Also, provide support for sustainable development.

27 citations

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Performance
Metrics
No. of papers in the topic in previous years
YearPapers
20221
20212
20204
20194
20184
20174