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This paper focuses on the assessment of power systems dynamic stability, considering the example of the Blackout that occurred in Tunisia in 2014. The fault that caused the blackout is a short circuit that occurred on 31 August 2014. This work is a simulation of this fault using PSS/E Program with an assessment of the dynamic stability of the Tunisian power system. The work also addresses the importance...
The machine dynamics response to any impact in the system is oscillatory. In past, the size of power system is smaller; therefor the period of oscillation was not much greater than one second. Today large capacity of generator and system interconnected with the greater system inertias and relatively weaker ties results in longer period of oscillation followed by perturbation. These are the situations...
Voltage, frequency and power (real and reactive) plays an important role in power system. It should be in a predefined limit and if any one of them violates its limits then the system becomes unstable. Our generation capacity is not increasing as compare to loads increasing due to environmental and economical reason. Power system is operating at critical value. To enhance the maximum power transfer...
Current paper introduces a novel structure for power system stabilizer (PSS) using mixed of proportionalintegral-differential (PID) controller and IEEE type PSS2B. Proposed PID-PSS2B is designed in coordination with thyristor controlled series capacitor (TCSC)-based power oscillation damping (POD) controller to enhance power system small-signal stability. Although the coordinated design of conventional...
This paper presents a study of tuning the existing power system stabilizers (PSSs) of the Saudi Electricity Company (SEC) power system and its effect on increasing the power transfer limit of the interconnection between Eastern Operating Area (SECE-OA) and Central Operating Area (SEC-COA). This work is also investigating the optimal location of installing additional power system stabilizers (PSSs)...
A detailed dynamic study on Synchronous Generators Excitation Systems at Embedded Generation is presented. Through the SIMULINK ambient, several simulations were made and their performances are discussed regarding to System X/R relation changes, Short-Circuit Level, Fault Clearance Time and Voltage Profile. Studied Excitation Systems costs were considered also at the technical evaluation. Results...
The application of an adaptive pole shifting self tuning Static Var Compensator (SVC) to a multi area multi terminal HVDC system is described. The developed scheme employs generator speed deviation as a feedback signal through the proposed Proportional-Integral-Derivate (PID) controller to generate control input for the studied system. The self tuner for the static reactive power system control is...
In this paper, we analysis the effects of tie-line impedance value on the damp of interconnected power systems from the viewpoint of damping characteristics. Based on the interconnection between Xin Jiang power grid and Northwest power grid, this paper is focused on the changes in damping characteristics before and after interconnection. The simulation after increase of tie-lines in accordance with...
In this paper the dynamics of a single machine connected to infinite bus power system is analyzed. Such analysis requires a certain level of system modeling. The main system components models are the synchronous machine, excitation system and the Power System Stabilizer. The Matlab/Simulink is used as a programming tool to analyze the system performance. According to the system performance a proper...
From October 2008 the interconnection between northeast and north power grid switched from alternating current to direct current. It is urgent to research the stability of northeast power grid based on the real network data. This paper studied the stability changing by applying real-time time-domain simulation method and frequency-domain analysis method. Research result indicated that the stability...
Fast and effective means to restore the load has a very important theoretical and practical significance after blackout. Power system is a real-time dynamic system, the constraints in current in calculation all are steady-state parameters such as steady-state frequency, steady-state voltage etc. The probable out of step and voltage collapse during the dynamic processes after load restoration cannot...
Along with the six western regional power grids in Yunnan connecting to main network successively, power supply quality and reliability of each eparchy power grid has been ameliorated greatly. Simultaneously, new problems are brought to the safety and stability operating control of the main and regional power grids. Transient stability transmission capacity of tie lines from regional network to main...
This paper proposes an optimisation-based method to calculate the critical slip (speed) of dynamic stability and critical clearing time (CCT) of a self-excited induction generator (SEIG). A simple case study using the Matlab/Simulink environment has been included to exemplify the optimisation method. Relationships between terminal voltage, critical slip and reactance of transmission line, CCT and...
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