Damped Nyquist Plot for the Phase and Gain Optimization of Power System Stabilizers

Marco, Fernando De; Rullo, Pablo

doi:10.1016/j.epsr.2021.107708

Cited by 9 publications

(4 citation statements)

References 14 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Ideally, the Nyquist plot has a semicircular section in the high frequency region and a Warburg line (slope at 45°) at low frequencies. 56,65 The low curvature of the first part of the Nyquist diagram indicates a low charge transfer resistance (Rct) and the sharper second part of the diagram with a slope of nearly 90°c onfirms the ideal pseudocapacitive behavior of the system. 66 According to the obtained Nyquist plots of proposed electrodes, the PB/AEGO Nsh graphite sheet electrode has a lower R ct than other electrodes, which indicates the high kinetics of electron Table II.…”

Section: Spmentioning

confidence: 99%

Towards Using Polybenzidine-Graphene Oxide Sheet on Graphite as a New System for Supercapacitor Device Fabrication

Dadashi,

Farhadi,

Bahram

2024

J. Electrochem. Soc.

View full text Add to dashboard Cite

Polybenzidine-anodic exfoliated graphene oxide sheet (PB/AEGO Nsh) graphite sheet electrode was easily fabricated via electrochemical anodization of the graphite sheet followed by in situ chemical polymerization of benzidine on the anodized graphite sheet. Fourier transform infrared spectroscopy, dispersive Raman spectroscopy, and scanning electron microscopy investigations confirm that benzidine is successfully polymerized on the graphene oxide sheets created by the anodizing process. Evaluating the electrochemical performance of PB/AEGO Nsh graphite sheet electrode shows that the electrode has an excellent specific capacitance of about 841.89 mF cm−2 at 1 mA cm−2 in aqueous 1.0 M H2SO4 electrolyte. To check the applicability of the constructed electrode, a solid-state symmetric supercapacitor device separated by PVA/H2SO4 gel electrolyte was fabricated and its electrochemical performance was checked. Investigation of the capacitance behavior of the fabricated supercapacitor device indicates that the device has an excellent specific capacitance of about 334.7 mF cm−2 (230.11 F g−1) at 1 mA cm−2, maximum specific energy, and power density of 225 mWh cm−2 and 5000 mW cm−2, and cyclic life of 76.7% after 10000 galvanostatic charge/discharge cycles with non-IR drop. PB/AEGO Nsh graphite sheet electrode shows great potential for use in energy storage devices.

show abstract

Section: Spmentioning

confidence: 99%

Towards Using Polybenzidine-Graphene Oxide Sheet on Graphite as a New System for Supercapacitor Device Fabrication

Dadashi,

Farhadi,

Bahram

2024

J. Electrochem. Soc.

View full text Add to dashboard Cite

show abstract

“…The sliding mode control (SMC) is presented in paper [5], a farmland fertility algorithm (FFA) in [6] but the FFA is highly reliant on accurate and extensive data which can be challenging to acquire, a genetic algorithm in [7] which requires many iterations and evaluations, making it slow for complex problems like multi-machine system, a particle swarm optimization (PSO) in [8] but this algorithm performance critically depends on fine-tuning parameters, making it complex and less robust, a chaotic sunflower optimization algorithm in [9] which requiring careful tuning of chaotic parameters, struggles with local optima, prioritizing exploitation (refining good solutions) over exploration (finding new, potentially better regions) leading to missed global optima, a moth search algorithm in [10] but it lacks the rigorous mathematical backing of some established optimization methods, raising concerns about stability and global convergence guarantees, bio-inspired algorithms in [11] which is highly dependent on fine-tuning specific parameters, impacting effectiveness and requiring more expertise, a sliding mode control in [12]. Moreover, artificial intelligence-based training and tuning techniques have been used to develop a PSS as a Deep reinforcement learning-based method in [13], a neuro-adaptive predictive control in [14], a fuzzy-based controller in [15][16][17], damped Nyquist plot for the phase and gain optimization in [18] but all these algorithms may require intensive computations compared to simpler algorithms, especially for complex problems. Furthermore, robust control theories have been employed in the design of H∞-based robust power system stabilizers [19] in the case of one machine connected to the electrical grid.…”

Section: Introductionmentioning

confidence: 99%

Stabilisateur De Système d'ALIMENTATION Robuste Basé Sur Un Contrôle H∞ Structuré Pour La Stabilité d'UN Système Multi-Machine

KHELLOUFI,

SARI,

CHOUABA

2024

RRST-EE

View full text Add to dashboard Cite

A robust design of power system stabilizers (PSSs) using H∞ output feedback control has been introduced in this work. To facilitate the implementation of the designed PSSs, the proposed technique employs the H∞ to tune the fixed-structure conventional lead-lag PSS parameters of the multi-machine system. These PSSs are used to improve the damping of the local and inter-area low-frequency oscillations in power systems under different operating conditions. The proposed control is tested on a multi-machine system, which is a three-machine nine-bus system. A comparative simulation study shows a significant enhancement and good performance of the proposed design compared to an IEEE conventional power system stabilizer.

show abstract

“…The results of the simulations proved the robustness of the designed stabilization method in this paper. In [17], damped Nyquist is presented to select the optimal parameters of the PSSs. In this reference, first the participation coefficients are used for PSSs placement and then the proposed damped Nyquist presents a model of stabilizers.…”

Section: Introductionmentioning

confidence: 99%

Intelligent Design of Multi-Machine Power System Stabilizers (PSSs) Using Improved Particle Swarm Optimization

et al. 2022

View full text Add to dashboard Cite

In this paper, an improved version of the particle swarm optimization algorithm is proposed for the online tuning of power system stabilizers in a standard four-machine two-area power system to mitigate local and inter-area mode oscillations. Moreover, an innovative objective function is proposed for performing the optimization, which is a weight function of two functions. The first part of fitness is the function of the angular velocity deviation of the generators, and the other part is a function based on the percentage of undershoot and maximum overshoot, and also the damping time of the power system oscillations. The performance of the proposed stabilization method is compared with the genetic algorithm and bacteria foraging algorithm results. Simulations are made in three different power system operation conditions by changing the system load. The simulation results indicate the superiority of the proposed method over the genetic algorithm and bacteria foraging algorithm. In all the scenarios, power system oscillations are damped faster and with lower amplitude when the power system stabilizers coordinate with the proposed optimization method.

show abstract

Damped Nyquist Plot for the Phase and Gain Optimization of Power System Stabilizers

Cited by 9 publications

References 14 publications

Towards Using Polybenzidine-Graphene Oxide Sheet on Graphite as a New System for Supercapacitor Device Fabrication

Towards Using Polybenzidine-Graphene Oxide Sheet on Graphite as a New System for Supercapacitor Device Fabrication

Stabilisateur De Système d'ALIMENTATION Robuste Basé Sur Un Contrôle H∞ Structuré Pour La Stabilité d'UN Système Multi-Machine

Intelligent Design of Multi-Machine Power System Stabilizers (PSSs) Using Improved Particle Swarm Optimization

Contact Info

Product

Resources

About