BOCS Based Power System Stability Margin Estimation

2013 ◽  
Vol 805-806 ◽  
pp. 693-699
Author(s):  
Li Jie Ding ◽  
Hang Fan
Keyword(s):  
Power System ◽  
Continuous Measurement ◽  
Stability Margin ◽  
Stability Index ◽  
Power System Stability ◽  
System Stability ◽  
Motion State ◽  
Surface System ◽  
The Stability ◽  
Severe Disturbance

This paper focuses on the estimation of the stability index of a power system after a severe disturbance. The description of the stability margin has always been a challenging issue but by introducing a ball-on-concave-surface system, the assessment of the power system stability is equivalent to the analysis to the motion state of the ball on concave. According to the continuous measurement of PMU, the parameter of the concave can be determined which is useful to judge the stability margin of the power system. Tests have been conducted on the systems with two generators and results show it can be accurate and reliable.

Feasibility Boundary Evaluation Using Eigenproperties of Jacobi Matrix from the Power Flow Routine

2013 ◽  
Vol 860-863 ◽  
pp. 2112-2116
Author(s):  
Pavel V. Chusovitin ◽  
Andrey V. Pazderin ◽  
Grigory S. Shabalin ◽  
Valery A. Taschilin
Keyword(s):  
Power System ◽  
Power Flow ◽  
Jacobi Matrix ◽  
Power System Stability ◽  
System Stability ◽  
Stability Monitoring ◽  
Boundary Evaluation ◽  
Shortest Distance ◽  
On Line ◽  
The Stability

The paper is devoted to the stability and feasibility boundary evaluation. New technique for evaluating shortest distance to feasibility boundary is described and tested. The technique is based on analysis of Jacobi matrix form the power flow routine. Described technique can be applied together with PMU-based identification procedures leading to new opportunities for on-line power system stability monitoring.

A study of impact of wind power to power system stability using stochastic stability index

2014 ◽  
Author(s):  
Panom Parinya ◽  
Anawach Sangswang ◽  
Krissanapong Kirtikara ◽  
Dhirayut Chenvidhya ◽  
Sumate Naetiladdanon ◽  
...  
Keyword(s):  
Power System ◽  
Wind Power ◽  
Stochastic Stability ◽  
Stability Index ◽  
Power System Stability ◽  
System Stability

scholarly journals Voltage stability analysis using STATCOM

2021 ◽  
Author(s):  
Umang Patel
Keyword(s):  
Power System ◽  
Power Control ◽  
Voltage Stability ◽  
Reactive Power ◽  
Stability Margin ◽  
Power System Stability ◽  
System Stability ◽  
Transmission Network ◽  
Voltage Stability Margin ◽  
Three Phase

Power system stability is gaining importance because of unusual growth in power system. Day by day use of nonlinear load and other power electronics devices created distortions in the system which creates problems of voltage instability. Voltage stability of system is major concerns in power system stability. When a transmission network is operated near to their voltage stability limit it is difficult to control active-reactive power of the system. Our objectives are the analysis of voltage stability margin and active-reactive power control in proposed system which includes model of STATCOM with aim to analyse its behavior to improve voltage stability margin and active-reactive power control of the system under unbalanced condition. The study has been carried out using MATLAB Simulation program on three phase system connected to unbalanced three phase load via long transmission network and results of voltage and active-reactive power are presented. In future work, we can do power flow calculation of large power system network and find the weakest bus of the system and by placing STATCOM at that bus we can improve over all stability of the system

scholarly journals Analysis of Transient Stability for Multimachine Power System

2020 ◽  
pp. 88-93
Keyword(s):  
Power System ◽  
Transient Stability ◽  
Power System Stability ◽  
Time Domain Analysis ◽  
Static Stability ◽  
System Stability ◽  
Reliable Operation ◽  
Machine System ◽  
Angle Stability ◽  
The Stability

The stability is an important guarantee for the safe and reliable operation of the power system, it is a decisive factor to limit the transmission distance and conveying capacity of the power system. Therefore, various measures must be taken to improve the system stability. The stability of the power system includes power angle stability, voltage stability and frequency stability. Among them, the power angle stability includes static stability and transient stability. Considering the importance of stability to the power system, the power system stability analysis methods and the measures to improve the power system stability is studied, so as to provide some useful reference for the safe and reliable operation of the power system. Generally, for multi-machine system transient stability becomes a major concern of wide power system due to load demand increasing day by day. In order to withstand disturbances with power quality issues requires evaluation of power system’s ability. There are many different kinds of methods for analysis of transient stability usually for multi-machine system. These methods include extended equal area criteria, time domain analysis and direct stability methods such as the transient energy function.

scholarly journals Power System Transient Stability Enhancement by Tuning of SSSC and PSS Parameters Using PSO Technique

2018 ◽  
Vol 26 (5) ◽  
pp. 81-94 ◽  
Author(s):  
Hashim Dhahir Mohammed
Keyword(s):  
Power System ◽  
Transient Stability ◽  
System Stability ◽  
Control Parameters ◽  
Improve Performance ◽  
Nonlinear Simulation ◽  
Simulation Results ◽  
The Stability ◽  
Stability Enhancement ◽  
Severe Disturbance

In this paper, the tuning design of  SSSC and PSS was examined in increasing the damping of system oscillations and improve the stability of the power system during disturbances. The design problem of the SSSC controller and PSS is designed as problem of optimization and the technique uses (PSO) technique to find for optimal control parameters. By minimizing the objective function based on the speed deviation and time domain, which deliberately deviates at the oscillation angle of the alternator rotor to improve performance of transient stability of the system. The proposed controllers are tested on the system of weak bonding ability exposed to severe disturbance. Nonlinear simulation results are presented to demonstrate the proposed controller's effectiveness and its ability to give efficient damping. It is also noted that the proposed controllers  of SSSC and PSS greatly improves the power system stability.

scholarly journals Advanced Control Techniques for Enhance the Power System Stability at OOS Condition

2019 ◽  
Vol 2 (1) ◽  
pp. 15
Author(s):  
Ali M. Eltamaly ◽  
Yehia Sayed Mohamed ◽  
Abou-Hashema M. El-Sayed ◽  
Amer Nasr A. Elghaffar
Keyword(s):  
Power System ◽  
Power System Stability ◽  
System Stability ◽  
Protective Equipment ◽  
Fault Line ◽  
Protection Relay ◽  
Control Techniques ◽  
Advanced Control ◽  
The Stability ◽  
Line Switching

<p>The power system stability is the accurate operation of the electric grid by restoring balance after being subjected to an abnormal condition such as fault, line switching, load rejection, and loss of excitation. Protective equipment in high voltage substations should fast and precisely localize the faults. Some abnormal conditions in the power system such as out-of-step (OOS) condition which is not a real fault, but the protection equipment will consider it is. This misjudgment will cause the loss of synchronism between areas within the power system or between interconnected systems and will lead to blackout of the national grid. This paper studied the OOS condition, philosophy of protection relay device and how to avoid the false operation for distance function by Out of Step Blocking (OSB) by using the advanced protection relay, to improve the stability of power system. </p>

scholarly journals Voltage stability analysis using STATCOM

2021 ◽  
Author(s):  
Umang Patel
Keyword(s):  
Power System ◽  
Power Control ◽  
Voltage Stability ◽  
Reactive Power ◽  
Stability Margin ◽  
Power System Stability ◽  
System Stability ◽  
Transmission Network ◽  
Voltage Stability Margin ◽  
Three Phase

Power system stability is gaining importance because of unusual growth in power system. Day by day use of nonlinear load and other power electronics devices created distortions in the system which creates problems of voltage instability. Voltage stability of system is major concerns in power system stability. When a transmission network is operated near to their voltage stability limit it is difficult to control active-reactive power of the system. Our objectives are the analysis of voltage stability margin and active-reactive power control in proposed system which includes model of STATCOM with aim to analyse its behavior to improve voltage stability margin and active-reactive power control of the system under unbalanced condition. The study has been carried out using MATLAB Simulation program on three phase system connected to unbalanced three phase load via long transmission network and results of voltage and active-reactive power are presented. In future work, we can do power flow calculation of large power system network and find the weakest bus of the system and by placing STATCOM at that bus we can improve over all stability of the system

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