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Your search keyword '"Bahrani, Behrooz"' showing total 6 results
Start Over Author "Bahrani, Behrooz" Journal ieee transactions on power systems
6 results on '"Bahrani, Behrooz"'

4. A Planning Method for Synchronous Condensers in Weak Grids Using Semi-Definite Optimization

Author

Hadavi, Sajjad, Saunderson, James, Mehrizi-Sani, Ali, and Bahrani, Behrooz

Abstract

Synchronous Condensers (SynCons) offer voltage regulation, inertia, and fault current contribution to solve the challenges of voltage and frequency instability introduced by the high penetration of renewable energy resources (RERs). However, the cost of installation and operation of a SynCon is noticeable. Furthermore, the SynCons installation can take more than a year, which means the number, size, and placement of the SynCons must be selected optimally. This paper proposes a method to formulate the optimal sizing and allocation of the SynCons via mixed-integer convex optimization. The optimization procedure aims to minimize the cost of SynCons installation, maintenance, and operation while maintaining a certain Short Circuit Ratio (SCR) at points of connection (PoCs). To ensure the SCR at the PoCs is greater than a certain threshold, the SCRs are formulated as constraints in the proposed optimization procedure. The modified IEEE 39-bus system is used to evaluate the proposed optimization method. The performance of the system with optimal SynCons is verified by electromagnetic transient time-domain simulation using PSCAD/EMTDC software. The simulation results show that the system with the optimal installation of SynCons performs better than the system without the SynCons or with a non-optimal installation of SynCons. With the optimized system, all renewable energy resources are stable after contingencies.

Published
2023
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5. A Robust Exciter Controller Design for Synchronous Condensers in Weak Grids.

Author

Hadavi, Sajjad, Rathnayake, Dayan B., Jayasinghe, Gamini, Mehrizi-Sani, Ali, and Bahrani, Behrooz

Subjects
BINARY sequences, SYSTEM identification, TEST systems, REACTIVE power, DESIGN, ELECTRON tube grids, COMPUTER software testing
Abstract

Weak grid scenarios and low-inertia systems are emerging issues in power systems, which could lead to voltage and frequency instabilities. Synchronous Condensers (SynCons) have recently drawn renewed attention as a promising solution to provide system strength and inertia support. Even though the exciter control of SynCons is a well-established technology, further developments are required to guarantee the stability of post-fault operations, in particular, in weak grids. This paper proposes a data-driven approach for designing higher-order optimized exciter controllers to meet this requirement. A pseudo-random binary sequence (PRBS)-based system identification method is used to obtain frequency response data of the power system, from the exciter point of view, which is then fed into the proposed optimal control design procedure. The proposed exciter controller is tested for voltage ride-through and fault scenarios in a single machine infinite bus (SMIB) case and the IEEE 39-bus test system to assess its performance compared to the conventional AC1A exciter controller. The results obtained through simulation tests carried out using the PSCAD/EMTDC software verify that the proposed exciter controller guarantees the post-fault stability in both strong and weak grids. [ABSTRACT FROM AUTHOR]

Published
2022
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