Appropriate placement of series compensators to improve transient stability of power system

Appropriate placement of series compensators to improve small signal stability of power system

“…MATLAB®10b has been used for implementation of the proposed method, and finally results have been verified using industrial software SIMPOW®11. This method can be extended in a way to be applied to the other types of FACTS devices and along with the method described in [9] can be used as a powerful package to analyze the effects of any types of FACTS devices on both small signal and transient stability of power system.…”

“…In this paper, since power system is going to be analyzed before fault occurrence, the system works in its operating point and all the state and algebraic variables are fixed. The trajectory sensitivities are computed using (7) and (8) with the initial condition described in (9) and (10), and as a result of non zero initial values, trajectory sensitivities will oscillate around their operating points. These oscillations exactly show how sensitive are state and algebraic variables to the system parameters for small disturbances in the system and will be used here as a tool for optimal placement of series compensators to improve small signal stability of power system.…”

“…The calculated eigenvalue sensitivities are based on the product of the modal controllability of series reactance modulation and the observability factor of the input signal. [9] has applied trajectory sensitivity analysis to the power system for optimal placement of series FACTS devices to improve transient stability of power system. Computed trajectory sensitivities of rotor angles of generators with respect to the impedances of transmission lines show the effect of each transmission lines on the transient stability of power system when subjected to severe faults.…”

“…Computed trajectory sensitivities of rotor angles of generators with respect to the impedances of transmission lines show the effect of each transmission lines on the transient stability of power system when subjected to severe faults. This paper is a continuation of [9] and uses trajectory sensitivity analysis to determine the best locations for installing series compensators to enhance power oscillation damping. It indicates that when there is no fault in the system, the trajectory sensitivities of generators' rotor angles to the impedance of transmission lines can be used as a powerful tool to find the most effective transmission lines for small signal stability improvement.…”

“…It indicates that when there is no fault in the system, the trajectory sensitivities of generators' rotor angles to the impedance of transmission lines can be used as a powerful tool to find the most effective transmission lines for small signal stability improvement. The most important point is that the methods described here and in [9] can be used together as a powerful and efficient tool to analyze the effects of series FACTS devices on both transient and small signal stability of power system and also can be extended in a way to cover the other types of FACTS devices.…”