In the electrical energy market, distributed generation refers to small-scale electricity-generating technologies such as solar panels or windmills. These technologies help alleviate demand on the electric grid and may serve a single structure or be a part of a microgrid in proximity to consumers. Sustainability and global warming are motivators for the growing adoption of DG. The aging U.S. electrical grid is another driver to move toward renewable energy technologies. However, system operators are struggling with forecasting future demand, as well as integrating DG into the current electrical grid. There is also some concern in the industry about how the increased adoption of DG will affect electrical energy rates.
Researchers Gasser G. Ali, Islam H. El-adaway, Charles Sims, J. Scott Holladay, and Chien-Fei Chen investigated the feedback between the dynamic pricing of electric power and DG adoption and developed a multidisciplinary framework. In their paper, “Studying Dynamic Pricing in Electrical Power Markets with Distributed Generation: Agent-Based Modeling and Reinforcement-Learning Approach” in the Journal of Energy Engineering, they discuss their framework that combines electrical power engineering, economics, consumer behavior, machine learning, and agent-based modeling. Learn more about how this research could guide decisions for DG regulations, consumer incentives, and future grid expansion at https://doi.org/10.1061/(ASCE)EY.1943-7897.0000854. The abstract is below.
Distributed generation (DG) refers to small-scale generation resources that are located at or near end-consumers, such as photovoltaic (PV) solar systems. DG systems have become increasingly popular in recent years owing to their economic efficiency, reliability, and sustainability. However, the increasing adoption of DG is creating new obstacles for system operators due to the uncertainty in forecasting future demand. One concern is the possibility of facing a utility death spiral as a feedback loop between, on the one hand, the increasing adoption of DG and increasing electricity rates to cover generation and transmission overheads with, on the other hand, reduced demand from the grid. The goal of this study was to investigate the effects of the penetration of DG on the power infrastructure and wholesale power markets considering the dynamic pricing of electric power. To achieve that goal, a complex system-of-systems (SoS) simulation for wholesale power markets and infrastructure is developed using agent-based modeling (ABM), Optimal Power Flow (OPF), and reinforcement learning (RL). The simulation framework is enabled by (1) consumer behavior that compares the benefits of installing DG versus the costs of conventional power from the grid; and (2) the dynamic pricing of electric power. Several RL algorithms are compared, including basic RL, multiplicative RL, Roth-Erev RL, a modified Roth-Erev, and a variation of the aforementioned algorithms using a Gibbs-Boltzmann cooling factor by means of a grid of learning parameters relevant to each technique. The results show that (1) low-cost generators, such as nuclear power plants, are the least affected by the penetration of DG, while high-cost generators are the most affected, (2) a utility death spiral is unlikely to occur, and (3) a modified Roth-Erev RL algorithm can be used by generating companies to maximize their gross profits by optimizing their supply curves considering the feedback effect on DG adoption rates. Overall, the proposed simulation framework can assist policymakers and future researchers in studying the interaction between dynamic pricing in wholesale power markets and the adoption of DG. By simulating the long-term effect of DG on the electric power infrastructure and market, policymakers can introduce regulations and incentives to strategically influence the rate of adoption of DG.
Read the paper in full in the ASCE Library: https://doi.org/10.1061/(ASCE)EY.1943-7897.0000854.