Robust PID-PSS Design for Stability Improvment of Grid-Tied HydroTurbine Generator

Abstract

Dynamic stability is considered a vital issue in modern power systems. In this work, a robust design is proposed for the stability improvement of grid-connected hydro-turbine generators using the adaptive concept-based Electro-Search optimizer (ESO). In this regard, we provide a dynamic stability analysis of a hydro-turbine generator located at the Aswan High Dam, where proportional integral-derivative power system stabilizer (PID-PSS) is examined for a single machine connected to the Egyptian power system (EPS). The PID controller is developed in the synchronized EPS to significantly mitigate lowfrequency oscillations due to various expected faults and undesirable operating conditions. Comprehensive simulation analysis is performed using Matlab/Simulink considering the synchronous machine rotor speed, mechanical and electrical output powers, field and terminal voltages. The operative performance of the introduced adaptive PID-PSS based ESO is assessed against the conventional system (i.e. without PSS) and system with standard PID-PSS under normal operating conditions where the effect of a 3-φ short-circuit fault is subjected at the grid bus. The findings prove that the proposed adaptive strategy can effectively maintain the dynamic stability of the main grid against fluctuations.

Inclusion of V2G and Power System Stabilizer for Residential Microgrid Applications

“…2 supported by the adaptation mechanism as a secondary control loop to tune the gains of the PID controller. For PID-PSS, it has been added in a direct adaptive manner as presented in [19] to extract the stabilizing voltage signal and added to the automatic voltage regulator (AVR) inside the excitation system to offer a suitable damping property for V2G regulation of the studied MG systems as shown in Fig. 2.…”

“…In this discussion, a tuned PID controller was developed adaptively to extract the stabilizing voltage signal added to the AVR system within the excitatory system. The AVR mainly comprises of four parts, namely the exciter, generator, sensor to sense the terminal voltage, and regulator (amplifier) which is used to amplify the error voltage signal constructed from comparing the reference voltage terminal and the sensed signal used to control the synchronous generator field windings by means of the exciter [11,19]. The terminal voltage L , rotor speed (frequency), and output electric power A1 , mechanical output power , and regulation power MA † provided by V2G in case of fault duration are described as follows:…”

Optimal scheduling of DG and EV parking lots simultaneously with demand response based on self‐adjusted PSO and K‐means clustering

“…A study done 28 was achieved by using V2G impact to minimize total emissions with microgrid energy scheduling. Optimal scheduling of EVs was carried out in the study by Mortaz and Valenzuela 29 at the microgrid level, where various control strategies for enhancing the operation of microgrids connected to energy storage systems were introduced in various studies 30–34 . The optimal charging management was investigated by Mkahl et al 35 Similar work was achieved by Bin‐Humayd and Bhattacharya 36 .…”

“…Furthermore, the impact of V2G was not addressed 1,17 . The investigation of various studies 27–37 show that they did not include DR in V2G research studies. This encourages the authors of the current study to develop optimal day‐ahead scheduling of utility‐owned V2G combined with DR, which is rare in the literature.…”

Enhancement of Microgrid Power-Sharing Stability Using Droop Control Power System Stabilizer Based on Genetic Algorithm Optimization

“…By adjusting the output frequency, the inverters respond to changes in load demand and actively redistribute power accordingly. This decentralized approach promotes system stability and resilience by ensuring a balanced distribution of power among multiple inverters [4][5][6][7]. Moreover, the droop control technique is relatively simple to implement, making it an attractive option for load sharing in isolated microgrids.…”