Voltage stability assessment for radial distribution power system with wind power penetration

2011 ◽  
Author(s):  
M.M. Aly ◽  
M. Abdel-Akher
Keyword(s):  
Power System ◽  
Wind Power ◽  
Radial Distribution ◽  
Voltage Stability ◽  
Stability Assessment

Voltage Stability Assessment in Radial Distribution Power System

2015 ◽  
Vol 6 (1) ◽  
Author(s):  
Shivley Sageer ◽  
Om Sharma ◽  
Ratul Rana Patel ◽  
Ruchika Khare
Keyword(s):  
Power System ◽  
Radial Distribution ◽  
Distribution System ◽  
Voltage Stability ◽  
Voltage Drop ◽  
Distribution Networks ◽  
Critical Conditions ◽  
Stability Assessment ◽  
Radial Distribution Networks ◽  
Heavy System

The voltage stability problem of distribution networks is associated with a rapid voltage drop because of heavy system load. To operate the distribution system under such critical conditions the integration of distributed resource improves the reliability of supplying power by improving voltage stability and reducing the power losses. This paper presents voltage stability analysis of radial distribution networks in the presence of distributed generation. The analysis is accomplished using different methods which can be evaluated at each node of the distribution system. In this paper study the all types of methods which is used to improve the Voltage Stability Assessment in radial distribution power system.

A New Method for Static Voltage Stability Assessment based on The Local Loadability Boundary

2012 ◽  
Vol 13 (4) ◽  
Author(s):  
Thang Van Nguyen ◽  
Y. Minh Nguyen ◽  
Yong Tae Yoon
Keyword(s):  
Power System ◽  
Voltage Stability ◽  
Direct Method ◽  
Electric Power System ◽  
New Method ◽  
Stability Assessment ◽  
Saddle Node Bifurcation ◽  
Static Voltage Stability ◽  
Saddle Node ◽  
Thevenin Equivalent

Abstract This paper proposes a new method for assessing static voltage stability based on the local loadability boundary or P- Q curve in two dimensional power parameter space. The proposed method includes three main steps. The first step is to determine the critical buses and the second step is building the local loadability boundary or the saddle node bifurcation set for those critical buses. The final step is assessing the static voltage stability through the distance from current operating point to the boundary. The critical buses are defined through the right eigenvector by direct method. The boundary obtained by the proposed method that is combining a variation of standard direct method and Thevenin equivalent model of electric power system is a quadratic curve. And finally the distance is computed through the Euclid norm of normal vector of the boundary at the closest saddle node bifurcation point. The advantage of the proposed method is that it keeps the advantages of both efficient methods, the accuracy of the direct method and simple of Thevenin Equivalent based method. Thus, the proposed method holds some promise in terms of performing the real time voltage stability assessment of power system. Test results of New England 39 bus system are presented to show the effectiveness of the proposed method.

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