Decentralized Robust Coordinated Controller of Excitation and Valve for Improvement of Power System Stability

2014 ◽  
Vol 668-669 ◽  
pp. 462-465
Author(s):  
Zhi Min Li ◽  
Xin Yang Deng ◽  
Xiao Ming Mou ◽  
Shuang Rong ◽  
Tian Kui Sun ◽  
...  
Keyword(s):  
Power Systems ◽  
Power System ◽  
Control Systems ◽  
Coordinated Control ◽  
Power System Stability ◽  
System Stability ◽  
Control Scheme ◽  
Terminal Voltage ◽  
Simulation Results ◽  
Generator Terminal

A novel robust control scheme for decentralized generator excitation and valve coordinated control systems to improve power system stability is proposed. By utilizing generator terminal voltage magnitude and phase angle to represent the interactions among generators, decentralized generator excitation and valve coordinated control in multi-machine power systems is achieved. The control is realized by robust parametric approach. Simulation results show that the proposed robust parametric coordinated control can improve power system stability.

scholarly journals A Feasibility Solution of a Synchronous Generator for Optimisation of the System Power Stability using an Integrated Development Environment of Visual Basic-Excel

2020 ◽  
Vol 9 (3) ◽  
pp. 1261-1268
Keyword(s):  
Power Systems ◽  
Power System ◽  
Digital Simulation ◽  
Synchronous Generator ◽  
Power System Stability ◽  
System Stability ◽  
Development Environment ◽  
Runge Kutta ◽  
Mathematical Techniques ◽  
Computational Resources

Power systems are considered highly non-linear because the environment in which they operate keep changing and hence require iterative mathematical techniques to analyse them. Such changes have a resultant effect on the system`s stability. Fluctuations in parameters are experienced in loads across the networks of the system, generator`s outputs, network topology and other operating parameters. Practically, there is no analytical solution exists for solving the problem of stability. On the other hand, there are techniques available to obtain an acceptable approximate solution of such a problem, known as digital simulation. Runge-kutta method is one of these techniques which has been used broadly as it calculates every step in a sequence of sub-steps. The method relies on a complex mathematical modelling of the synchronous generator with the help of Park-Gorev`s transformation, for the sake of simplicity and intuitiveness the method is used to analyse and study the complex equations of the three-phase synchronous generator. Generally, the system is said to be stable if the opposing forces within it are balanced and at a perfect equilibrium. The aims of this research are to establish the effects of synchronous generator`s design and transient conditions upon power system stability with the help of Embedded Microsoft Excel Sheet based on Power System Stability Analysis (EMES-PSS), using the Runge-Kutta integration method. The study has proved that EMES-PSS can find the limits of Salient and Non-Salient machines stability when changing their essential parameters. The optimisation solutions of the power system stability problem can be achieved by using basic computational resources. The software can also be used on a number of modern tablets e.g., Apple`s tablets.

scholarly journals Probabilistic stability analysis: the way forward for stability analysis of sustainable power systems

2017 ◽  
Vol 375 (2100) ◽  
pp. 20160296 ◽  
Author(s):  
Jovica V. Milanović
Keyword(s):  
Stability Analysis ◽  
Power Systems ◽  
Power System ◽  
Power System Stability ◽  
Spatial Uncertainty ◽  
System Stability ◽  
Integral Approach ◽  
Storage Devices ◽  
Wide Range ◽  
First Time

Future power systems will be significantly different compared with their present states. They will be characterized by an unprecedented mix of a wide range of electricity generation and transmission technologies, as well as responsive and highly flexible demand and storage devices with significant temporal and spatial uncertainty. The importance of probabilistic approaches towards power system stability analysis, as a subsection of power system studies routinely carried out by power system operators, has been highlighted in previous research. However, it may not be feasible (or even possible) to accurately model all of the uncertainties that exist within a power system. This paper describes for the first time an integral approach to probabilistic stability analysis of power systems, including small and large angular stability and frequency stability. It provides guidance for handling uncertainties in power system stability studies and some illustrative examples of the most recent results of probabilistic stability analysis of uncertain power systems. This article is part of the themed issue ‘Energy management: flexibility, risk and optimization’.

scholarly journals Fuzzy Coordinated Control of TCSCs to Improve Power System Stability

2012 ◽  
Vol 1 ◽  
pp. 913-918
Author(s):  
A. Ghafouri ◽  
G.B. Gharehpetian ◽  
J. Milimonfared
Keyword(s):  
Power System ◽  
Coordinated Control ◽  
Power System Stability ◽  
System Stability
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