Journal of Modern Power Systems and Clean Energy

ISSN 2196-5625 CN 32-1884/TK

Two-stage Transient-stability-constrained Optimal Power Flow for Preventive Control of Rotor Angle Stability and Voltage Sags
Author:
Affiliation:

1.Faculty of Electrical Engineering, Universidad Michoacana de San Nicolás de Hidalgo, 58030 Morelia, México;2.Department of Electrical Engineering, Universidad of Guanajuato, 36787 Salamanca, México;3.Department of Electrical and Electronic Engineering, Universidad Juárez Autónoma de Tabasco, 86040 Villahermosa, México

Fund Project:

This work was supported by the Fondo de Sustentabilidad Energética SENER-Conacyt, México (No. 246949, No. 249795).

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    Abstract:

    In practice, an equilibrium point of the power system is considered transiently secure if it can withstand a specified contingency by maintaining transient evolution of rotor angles and voltage magnitudes within set bounds. A novel sequential approach is proposed to obtain transiently stable equilibrium points through the preventive control of transient stability and transient voltage sag (TVS) problems caused by a severe disturbance. The proposed approach conducts a sequence of non-heuristic optimal active power re-dispatch of the generators to steer the system toward a transiently secure operating point by sequentially solving the transient-stability-constrained optimal power flow (TSC-OPF) problems. In the proposed approach, there are two sequential projection stages, with the first stage ensuring the rotor angle stability and the second stage removing TVS in voltage magnitudes. In both projection stages, the projection operation corresponds to the TSC-OPF, with its formulation directly derived by adding only two steady-state variable-based transient constraints to the conventional OPF problem. The effectiveness of this approach is numerically demonstrated in terms of its accuracy and computational performance by using the Western System Coordinated Council (WSCC) 3-machine 9-bus system and an equivalent model of the Mexican 46-machine 190-bus system.

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History
  • Received:July 09,2023
  • Revised:October 14,2023
  • Adopted:
  • Online: September 25,2024
  • Published: