Design of a robust PID-PSS for an uncertain power system with simplified stability conditions

Abstract

In a deregulated power system uncertainty exists and lack of sufficient damping can lead to Low Frequency Oscillations (LFO). The problem can be addressed using robust Power System Stabilizers (PSS). In this paper, an optimal procedure to design a robust PID-PSS using interval arithmetic for the Single Machine Infinite Bus (SMIB) power system is proposed. The interval modelling captures the wide variations of operating conditions in bounds of system coefficients. In the proposed design procedure, simple and new closed loop stability conditions for an SMIB interval system are developed and are used to design an optimum PID-PSS for improving the performance of an SMIB system. The optimum PID-PSS is attained by tuning the parameters using the FMINCON tool provided in MATLAB. The robustness of the proposed PID-PSS design is validated and compared to other notable methods in the literature when the system is subjected to different uncertainties. The simulation results and performance error values show the effectiveness of the proposed robust PID-PSS controller.

Impact of load variation on power system stability and performance of power system stabilizers: A case study of Peerdawd gas power station, Iraq

“…substituting in (12) in (11) gives: where (Pm, Pe, and Pacc) are the mechanical, electrical, and accelerating powers of the generator respectively in per-unit, (M and H) are the inertia constant both in second, (ωeq) is the equivalent angular speed in per-unit and (G(s)) is the transfer function of the low-pass filter. Thus, The integral of mechanical power is related to shaft speed and electrical power.…”

“…Power system stabilizers (PSSs) have been used extensively to reduce (SSOs) and enhance dynamic stability of electrical systems because they are affordable, straightforward, and quick to install (EPS). The most common (PSS) structure is a lead-lag type (phase compensator), whose gain and pole-zeros are established using linear control theory and a linearized dynamic model of (EPS) [10]- [12]. The power factor (PF) is one of the most important factors on the power system.…”

A Survey on FOPID Controllers for LFO Damping in Power Systems Using Synchronous Generators, FACTS Devices and Inverter-Based Power Plants

“…The simulation results performed in four states are presented in Figures 11 and 12. It should be noted that the simulation is based on a comparison between the performance of the FOPID controller and other proposed PODCs in the literature [87][88][89][90][91][92][93][94][95][96][97][98]. Note that the FOPID controller with the optimal set of parameters can mitigate both inter-area and local oscillations.…”

Single-Ended Fast Protection for Transient Power of Multi-Terminal Flexible and Direct Power Grids Containing Renewable Energy

“…Though different judgment of internal and external faults effectively reduces the burden of protection setting, an appropriate simulation setting is still required. A wavelet transformation method was devised in reference (ASV et al, 2020) to extract the transient characteristics of the faults inside and outside the area according to the boundary characteristics of the DC line to construct the best judgment for its protection (Zhao et al, 2011). Further literature (Liu et al, 2017) has been directed at the structure design of two-level VSC converters in the DC system.…”