A new voltage stability index based on the tangent vector of the power flow jacobian

2013 ◽  
Author(s):  
N Vishwas Acharya ◽  
P. S. Nagendra Rao
Keyword(s):  
Power Flow ◽  
Voltage Stability ◽  
Tangent Vector ◽  
Stability Index ◽  
Voltage Stability Index

Research on the Voltage Stability of the Microgrid

2014 ◽  
Vol 521 ◽  
pp. 256-259
Author(s):  
Jian Yuan Xu ◽  
Guan Nan Wu ◽  
Qin Yu Bai
Keyword(s):  
Power Flow ◽  
Voltage Stability ◽  
Stability Index ◽  
Grid Structure ◽  
Voltage Stability Index ◽  
Static Voltage Stability ◽  
Node Voltage ◽  
Operation Characteristics

In allusion to the grid structure and operation characteristics of the microgrid, in this paper a static voltage stability index for microgrid was deduced based on the existence of the power flow. The index has taken the node voltage into account and is free from the influence of the grids R/X; besides, it has a smaller error for it has no network loss equivalent during its deduction. Then one 13-node microgrid system was established to validate the deduced index, finally the index was used to analyze the influence of distributed sources including the PV, PI, P-Q(V) node types as well as heir locations and capacities on the static voltage stability of microgrid.

scholarly journals Novel Voltage Stability Index for Electric Power System Monitoring

2019 ◽  
Vol 10 (1) ◽  
pp. 1-9
Author(s):  
Aziz Oukennou ◽  
Abdelhalim Sandali
Keyword(s):  
Power System ◽  
Power Flow ◽  
Voltage Stability ◽  
Stability Index ◽  
Test System ◽  
Electric Power System ◽  
Monitoring Tool ◽  
Voltage Stability Index ◽  
Power System Monitoring ◽  
The Difference

This paper aims to develop a novel voltage stability index (NVSI) to evaluate and detect the voltage collapse proximity in the power system. This NVSI is based on the combination of two indices and the approximation made on the difference in angle between the sending bus and the receiving one in the power system. Compared to indices developed in the literature, the advantage of the new voltage stability index (NVSI) is that it can be computed very quickly and easily from power flow results, such as voltages, magnitudes and angles. The static and dynamic studies have been carried out on the IEEE 14-bus test system using PSAT Software. The proposed index has shown more sensitivity and simplicity, and that it can be used as a monitoring tool.

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