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Start Over Topic engineering Publication Year Range Last 3 years Journal ieee transactions on power systems
4 results

1. A Scalable Approach to Large Scale Risk-Averse Distribution Grid Expansion Planning

Author

Moreira, Alexandre, Heleno, Miguel, Valenzuela, Alan, Eto, Joseph H, Ortega, Jaime, and Botero, Cristina

Subjects
Engineering, Electrical Engineering, Electrical and Electronic Engineering, Energy, Electrical engineering
Abstract

Distribution grid reliability and resilience has become a major topic of concern for utilities and their regulators. In particular, with the increase in severity of extreme events, utilities are considering major investments in distribution grid assets to mitigate the damage of highly impactful outages. Communicating the overall economic and risk-mitigation benefits of these investments to regulators is an important element of the approval process. Today, industry reliability and resilience planning practices are based largely on methods that do not take explicit account of risk. This paper proposes a practical method for identifying optimal combinations of investments in new line segments and storage devices while considering the balance between the risk associated with high impact and low probability (HILP) events and the reliability related to routine failures. We show that this method can be scaled to address large scale networks and demonstrate its benefits using a Target Feeder from the Commonwealth Edison Reliability Program.

Published
2024

2. Solving Market-Based Large-Scale Security-Constrained AC Optimal Power Flows

Author

Moreira, Alexandre, Valenzuela, Alan, and Heleno, Miguel

Subjects
Engineering, Electrical Engineering, Affordable and Clean Energy, Power system economics, Contingency management, Upper bound, Computational efficiency, Cost function, Costs, Load flow, power systems economics, security-constrained AC optimal power flow, Electrical and Electronic Engineering, Energy, Electrical engineering
Abstract

The security-constrained AC optimal power flow (SCACOPF) is one of the most important problems that the industry has to solve on a daily basis in several electricity markets across the globe within strict time limits. Mathematically, the SCACOPF is formulated as a mixed-integer non-convex program, which is a very challenging class of problems to be solved in practice, and even obtaining feasible solutions can be difficult. In addition, most independent system operators (ISOs) impose a deterministic n-1 security criterion and, consequently, further increase the dimensionality of the problem. In this paper, we present an algorithmic approach that obtains a feasible solution to this problem with a 1-hour time limit. Our approach combines contingency selection, decomposition, and tailored warm start to the non-convex problem, and its performance is illustrated with our results in Challenge 2 of the Grid Optimization (GO) competition created by the U.S. Advanced Research Projects Agency-Energy (ARPA-E).

Published
2023

3. Global Optimality of Inverter Dynamic Voltage Support

Author

Yifei Guo, Bikash C. Pal, Rabih A. Jabr, Hua Geng, and Engineering & Physical Science Research Council (EPSRC)

Subjects
Technology, Energy Engineering and Power Technology, Synchronization, dynamic voltage support (DVS), CAPABILITY, Engineering, Power system dynamics, GRIDS, Electrical and Electronic Engineering, FAULT-RIDE-THROUGH, Science & Technology, Energy, POWER-PLANTS, STABILITY, CONVERTER, MAXIMIZE, positive-sequence voltage, Stability analysis, inverter-based resources (IBRs), Engineering, Electrical & Electronic, Inverters, CONTROL STRATEGY, Power system stability, optimality, 0906 Electrical and Electronic Engineering, Power quality, Voltage control, GENERATION INVERTERS, Grid-connected inverter, SYSTEM
Abstract

This paper investigates the dynamic voltage support (DVS) of inverter-based resources (IBRs) under voltage sags to enhance the low-voltage ride-through performance. The DVS problem is formulated as a nonconvex optimization program that maximizes the positive-sequence voltage magnitude at the point of common coupling (PCC) subject to the current, active power, and synchronization stability constraints. Then, we perform the optimality analysis to explore the global optimum analytically. It is found that the unique global optimum has three scenarios/stages (S1S3), which depends on the specific relationship among grid voltage, grid strength, and physical limits of IBRs. The explicit closed-form solutions in S1 and S3 are derived, and the optimality conditions (an implicit solution) of S2 are provided, which guarantees the global optimality and enables the compatibility with fast real-time control. Finally, we implement the optimum with a grid-connected single-stage photovoltaic (PV) power plant by integrating a DVS controller. Dynamic simulations are carried out under different scenarios to test our proposal. The robustness against model errors is also discussed. Dynamic simulations are carried out under different scenarios to test our proposal and compare it with other existing methods.

Published
2022

4. The Need for Teaching Place-Based Contextualization for Sustainable Power System Infrastructure Design

Author

Abhiroop Chattopadhyay, Peter W. Sauer, and Ann Perry Witmer

Subjects
Contextualization, Engineering, Societal context, business.industry, Energy Engineering and Power Technology, Energy infrastructure, Engineering management, Electric power system, Work (electrical), Coursework, ComputingMilieux_COMPUTERSANDEDUCATION, Capstone, Power engineering, Electrical and Electronic Engineering, business
Abstract

In this paper, we make the case for an increased focus on teaching an understanding of societal context and the integral role it plays in energy infrastructure design. Power system design education is inadequate in terms of holistic understanding of the non-technical aspects of a client-society in the development of energy infrastructure solutions. These are reflected in many failed designs, primarily designed by student engineers as part of capstone projects, senior design projects, or extra-curricular work through humanitarian-oriented programs administered by NGOs. We are developing coursework that introduces students to the complexities involved in the practice of engineering in rural communities at the international level.

Published
2021