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.

scholarly journals Application of SSSC-Damping Controller for Power System Stability Enhancement

10.29007/hpts ◽  
2018 ◽  
Author(s):  
Ankit Patel ◽  
Pranav Raval ◽  
Dhaval Patel
Keyword(s):  
Power System ◽  
Power Flow ◽  
Power System Stability ◽  
System Stability ◽  
Power Flow Control ◽  
Power Oscillation Damping ◽  
Rotor Angle Stability ◽  
Stability Enhancement ◽  
Oscillation Damping ◽  
Damping Controller

At present, power demand is increasing day by day so we have to transfer more power and for this we must have to improve stability limits of our power system. In this paper application of static synchronous series compensator (SSSC) for enhancement of power system stability is throughout investigated. SSSC is effectively utilized for power flow control in the power system. A SSSC-based damping controller is proposed for power oscillation damping and to improve the rotor angle stability. A improved control signal can be superimposed as a power flow control signal for SSSC damping controller to improve the rotor angle stability and power oscillation damping in system. Speed deviation of rotor is taken as the input signal to the SSSC damping controller. A single machine infinite bus system (SMIB) with SSSC is simulated in MATLAB/Simulink software. Simulation results shows the effectiveness of this controller for power system stability enhancement under different fault conditions.

Stability Monitoring Using Voltage Perturbation for DC Distributed Power Systems

2002 ◽  
Vol 8 (2) ◽  
pp. 277-288 ◽  
Author(s):  
Jinjun Liu ◽  
Xiaogang Feng ◽  
Zhihong Ye ◽  
Fred C. Lee ◽  
Dushan Borojevich
Keyword(s):  
Power Systems ◽  
Perturbation Method ◽  
System Stability ◽  
Distributed Power ◽  
Stability Monitoring ◽  
Implementation Approach ◽  
Distributed Power Systems ◽  
Perturbation Source ◽  
On Line ◽  
The Stability

The stability issues in nonlinear systems such as multi-module power electronics systems, especially DC distributed power systems, are often dealt with by employing the impedance criterion. However, for on-line system stability monitoring, to direct measure the impedance of the source and load subsystems and then making comparisons is complicated and difficult. This paper proposes a practical and simple method, which involves utilizing voltage perturbation, to monitor the stability margin of DC distributed power systems. A voltage perturbation source is applied to the DC side of the system and only the amplitude of two voltages needs to be measured, therefore this method can be easily used for on-line stability monitoring. An implementation approach of this method, which does not employ additional voltage perturbation source but utilizes the front-end subsystem, is also presented. Theoretical analysis and computer simulations are given to verify the effectiveness of both the monitoring method and the implementation approach. A comparative evaluation of the voltage perturbation method versus the current perturbation method for stability monitoring is provided.

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.

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