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The power system is a dynamic system and it is constantly being subjected to disturbances. It is important that these disturbances do not drive the system to unstable conditions. From the power system point of view, the excitation system of synchronous generator must contribute for the effective voltage control and enhancement of the system stability. The requirement for electric power stability is...
Automatic Voltage Regulator (AVR) regulates the generator terminal voltage by controlling the amount of current supplied to the generator field winding by the exciter. Power system stabilizer (PSS) is installed with AVR to damp the low frequency oscillations in power system by providing a supplementary signal to the excitation system. Optimal tuning of AVR controller and PSS parameters is necessary...
This paper presents a comparative study of dynamic performance of conventional VSC based HVDC and Modular Multilevel Converter (MMC) VSC based HVDC operating in back to back configuration. Voltage and rotor angle stability of the generator during power systems fault is analyzed. The simulated power system is composed by a back-to-back HVDC based on conventional VSC and the MMC connecting two weak...
The paper presents a step-by-step design methodology of an Adaptive Neuro-Fuzzy Inference System (ANFIS) and H?? optimization methods based Automatic Voltage Regulator (AVR) and Power System Stabilizer (PSS).This paper demonstrates their performance in a single-machine-infinite-bus power system through digital simulation. The ANFIS design employs a zero and a first order Sugeno fuzzy model, whose...
This paper reviews new approaches in modern research using Artificial Intelligent (AI) techniques to develop power system stabilizer (PSS). These techniques are Artificial Neural Network (ANN), fuzzy logic, hybrid artificial intelligent, expert systems, and optimization techniques base AI such as Genetic Algorithm (GA), Particle Swarm Optimization (PSO), Tabu Search (TS) algorithm, etc. Research showed...
This paper presents the small-signal stability analysis of a power system using PacDyn 8.1 simulation tool. PacDyn is a comprehensive small-signal stability analysis package which was developed by CEPEL. This software package supports built-in as well as user defined models. The user defined models are investigated and results compared to those obtained using traditional built-in models for excitation...
Small signal stability is the ability of the marine power system to maintain synchronism when subjected to small disturbance. To improve the stability performance of marine power system, a power system stabilizer (PSS) is introduced into the traditional marine generator excitation system with automatic voltage regulator (AVR). Load compensation is used to control a voltage which is representative...
This paper presents a novel controller based on the delayed feedback control theory for stabilizing unstable torsional oscillations caused by Subsynchronous Resonance (SSR) in power systems. The first system of the IEEE Second Benchmark Model, which consists of a synchronous generator connected to an infinite busbar through two parallel transmission lines, one of which is equipped with a series capacitor,...
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