An Aggregator-Based Market Modelling with an Impact of Risk Under Uncertainty

Authors

Keywords:

Aggregators, Conditional Value at Risk, Distribution Network Operator, Renewable Energy Sources, Value at Risk.

Abstract

In the Electricity market the increased penetration of renewable energy sources (RES) and associated uncertainties impose challenges to determine the day-ahead distribution locational market prices effectively and also these uncertainties can jeopardize grid stability and reliability. RES aggregators compete to increase their profit but their intermittent nature adds financial risks to aggregators (A’s). The main objective of this paper is to model a day-ahead electricity market by considering RES aggregators as participants to trade energy effectively to maintain a dynamic energy balance. Instead of relying on existing probabilistic forecast methods to account for the variable uncertain nature of RES, this paper uses a novel data-driven forecasting method to predict variable RES power generation accurately. The proposed model follows a three stage approach. The first stage involves forecasting PV and wind output power with multiple scenarios. In the second stage, a scenario-based multi-aggregator market modelling is performed where aggregators submit their bids to the distribution network operator, who then clears the market by generating price signals. Uncertainties of RES aggregators lead to financial risk for aggregators. Hence, the third stage involves, risk assessment using value at risk (VaR) and conditional value at risk (CVaR) are applied to different scenarios for evaluating the potential portfolio losses within a specified time horizon and confidence level. To evaluate the effectiveness of the proposed model, it is tested on a modified 33-bus test system which shows effective energy trading at a distribution system with a considerable marginal range of voltage violations. The proposed novel three-stage model aims to improve the distribution level electricity market’s efficiency and reliability, benefiting RES market participants and consumers alike.

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Author Biographies

Pavani Thallapally, NIT Warangal

Pavani Thallapally received B.Tech degree in Electrical and Electronics Engineering from Kakatiya University in 2009 and M.Tech degree from JNTUH in 2013. Currently, she is a research scholar at Electrical Engineering Department, National Institute of Technology, Warangal, Telangana, India. Her area of interest includes Electricity market modelling, micro-grid energy management, power system stability, AI and Optimization techniques.

Debasmita Panda, NIT Warangal

Debasmita Panda (Member, IEEE) received the M.Tech. (Tech.) degree in Energy Science and Engineering from the Indian Institute of Technology Bombay, Mumbai, India, in 2009, and the Ph.D. degree in electrical engineering (Power System) from the Indian Institute of Technology, Kanpur, India, in 2017. Her employment experience includes working as an Energy Analytics in a State Regulatory commission in India. She also worked as an Engineer at OSI India. She is currently working as Professor of electrical engineering with the National Institute of Technology Warangal. She is also the member of the Smart Grid Master’s Program. Her research interests include Smart Grid Planning and Operation, management of distributed and flexible energy resources in smart energy systems, market concepts for smart grids and Transactive Energy Market. She has won best paper award at IEEE conference, Bangalore, India in the year 2017. She has authored 4 book chapters and many peer reviewed Journals.

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Published

2025-04-17

How to Cite

Thallapally, P., & Panda, D. (2025). An Aggregator-Based Market Modelling with an Impact of Risk Under Uncertainty. IEEE Latin America Transactions, 23(5), 415–426. Retrieved from https://latamt.ieeer9.org/index.php/transactions/article/view/9507

Issue

Section

Electric Energy