A new method in calculating line sensitivities for power system equivalencing

1994 ◽  
Vol 9 (3) ◽  
pp. 1465-1470 ◽  
Author(s):  
R.D. Shultz ◽  
M. Muslu ◽  
R.D. Smith
Keyword(s):  
Power System ◽  
New Method

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.

A new method for solving equality-constrained power system static-state estimation

1990 ◽  
Vol 5 (4) ◽  
pp. 1260-1266 ◽  
Author(s):  
K.A. Clements ◽  
G.W. Woodzell ◽  
R.C. Burchett
Keyword(s):  
Power System ◽  
State Estimation ◽  
New Method ◽  
Static State

A New Method to Optimize Locations of SVC Based on Risk and Static Load Margin

2013 ◽  
Vol 774-776 ◽  
pp. 1887-1890 ◽  
Author(s):  
Wei Zheng ◽  
Long Yue Zhang ◽  
Fu Bo Liang ◽  
Chao Ma ◽  
Yan Dong Xing
Keyword(s):  
Power System ◽  
Static Load ◽  
Risk Index ◽  
Wind Farms ◽  
System Security ◽  
New Method ◽  
Weak Links ◽  
Load Margin ◽  
Large Wind

A method was proposed selecting the location of SVC, considering the power system with large wind farms interconnected. The location can be determined by risk index, which comprises credibility and global severity, and static load margin simultaneously. The method could consider the weak links and buses under both fault and normal conditions thus make better contribution to the system security. Case study shows that the correctness and effectiveness of the proposed method, comparing with the usual one.

Study of a new method for power system transients classification based on wavelet entropy and neural network

2011 ◽  
Vol 33 (3) ◽  
pp. 402-410 ◽  
Author(s):  
He Zhengyou ◽  
Gao Shibin ◽  
Chen Xiaoqin ◽  
Zhang Jun ◽  
Bo Zhiqian ◽  
...  
Keyword(s):  
Neural Network ◽  
Power System ◽  
New Method ◽  
Wavelet Entropy ◽  
Power System Transients
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