Capacity credit

Capacity credit

Capacity credit refers to the ability of a power plant to contribute to the peak demands of a power system. It is a measure of the plant's capacity to provide power during times of high demand. The capacity credit can be influenced by various system features, such as energy storage, which can significantly impact the plant's ability to contribute to peak demands.From: Renewable Electricity and the Grid [2019], Capacity credit estimation for solar PV installations in conventional generation: impacts with and without battery storage [2021]

Capacity Credit of Renewable Energy

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Published in Ning Zhang, Chongqing Kang, Ershun Du, Yi Wang, Analytics and Optimization for Renewable Energy Integration, 2019

Ning Zhang, Chongqing Kang, Ershun Du, Yi Wang

The capacity credit of renewable energy is defined as the ratio of the capacity it can serve to that of conventional generation under the same load and reliability level. How much capacity credit should be given to renewable energy in generation system adequacy analysis is a question of great interest worldwide. Both a theoretical analysis and an accurate evaluation of the renewable energy power capacity credit are essential for understanding its contribution to power system reliability. Taking wind power as an example, this chapter reviews the definitions and algorithms of the capacity credit and summarizes the factors that affect its value. A rigorous model based on the definition of the reliability function (RF) is also presented. Numerical tests demonstrate the accuracy of the proposed model and its potential applicability under different circumstances.

Capacity credit estimation for solar PV installations in conventional generation: impacts with and without battery storage

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Published in Energy Sources, Part A: Recovery, Utilization, and Environmental Effects, 2021

Sandhya Prajapati, E. Fernandez

Energy storage is one major system feature that can influence the capacity credit significantly. Some papers have investigated the impact of battery storage on capacity credit. It is generally concluded that a combination of a solar PV installation with adequate battery backup can effectively improve the power supply availability of the overall system (Esmaili and Nasiri 2009; Song et al. 2013).

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Capacity Credit of Renewable Energy

Capacity credit estimation for solar PV installations in conventional generation: impacts with and without battery storage