Prioritizing the Restoration of Out of Service Transformers in a Transmission System

2019 ◽  
Vol 09 ◽  
Author(s):  
Madhvi Gupta ◽  
AK Gupta ◽  
NK Sharma
Keyword(s):  
Transmission Line ◽  
Voltage Stability ◽  
Stability Index ◽  
Transmission System ◽  
Load Flow ◽  
Matlab Software ◽  
Voltage Stability Index ◽  
Matlab Program

: A technique is proposed to decide the priority of out of transformer for repairing or replacement. Based on voltage stability, priority is assign for repairing or replacing the particular transformer. By using this method, number of out of service transformers in the transmission line can be find out and can be replaced or repair. The technique has been implemented in Matlab software, which is used to rank all the out of service transformer in the system. This Matlab program has been developed to conduct load-flow including Voltage Stability Index. This index ranks all the line. Transformer located at weakest line should be repaired first technically. The proposed method in this paper aims on the reliability of the system.

Static voltage stability index using multiple load-flow solutions

1991 ◽  
Vol 111 (3) ◽  
pp. 69-79 ◽  
Author(s):  
Akihiko Yokoyama ◽  
Teruhisa Kumano ◽  
Yasuji Sekine
Keyword(s):  
Voltage Stability ◽  
Stability Index ◽  
Load Flow ◽  
Voltage Stability Index ◽  
Static Voltage Stability ◽  
Multiple Load

scholarly journals Whale Optimization Algorithm Based Technique for Distributed Generation Installation in Distribution System

2018 ◽  
Vol 7 (3) ◽  
pp. 442-449
Author(s):  
Mohd Nurulhady Morshidi ◽  
Ismail Musirin ◽  
Siti Rafidah Abdul Rahim ◽  
Mohd Rafi Adzman ◽  
Mohamad Hatta Hussain
Keyword(s):  
Distributed Generation ◽  
Optimization Algorithm ◽  
Distribution System ◽  
Voltage Stability ◽  
Stability Index ◽  
Transmission System ◽  
Whale Optimization Algorithm ◽  
Voltage Profile ◽  
Voltage Stability Index ◽  
Whale Optimization

This paper presents Whale Optimization Algorithm (WOA) Based Technique for Distributed Generation Installation in Transmission System. In this study, WOA optimization engine is developed for the installation of Distributed Generation (DG). Prior to the optimization process, a pre-developed voltage stability index termed Fast Voltage Stability Index (FVSI) was used as an indicator to identify the location for the DG to be installed in the system. Meanwhile, for sizing the DG WOA is employed to identify the optimal sizing. By installing DG in the transmission system, voltage stability and voltage profile can be improved, while power losses can be minimized. The proposed algorithm was tested on 30-bus radial distribution network. Results obtained from the EP were compared with firefly algorithm (FA); indicating better results. This highlights the strength of WOA over FA in terms of minimizing total losses.

Test of Significance and Fiducial Limit of Voltage Stability Index for Indian 205 Bus System

2019 ◽  
pp. 1-14
Author(s):  
Madhvi Gupta ◽  
N. K. Sharma ◽  
A. K. Gupta
Keyword(s):  
Voltage Stability ◽  
Stability Index ◽  
Maximum Load ◽  
Transmission System ◽  
Power Delivery ◽  
Voltage Collapse ◽  
Stressed Condition ◽  
Voltage Profile ◽  
Voltage Stability Index ◽  
Test Of Significance

Voltage delivery stability is frequently used to analyze power delivery systems. Under stressed condition, these indices denote the flexibility of voltage stability condition and predict the voltage collapse phenomenon by weak area clustering. The prediction of voltage collapse is very important for the smooth operation of power system, so that situation of voltage collapse could be avoided. For small transmission system, these indices work satisfactorily. In the present work, a large transmission system equivalent to 205 bus Indian transmission system has been examined. The Fast Voltage Stability Index (FVSI) proposed has been applying to test the system under consideration. Various aspects of power delivery system for example voltage profile, maximum load-ability limit, weakest bus and the different weak area clustering have been examined. Although the FVSI values obtained in the test result are capable of identifying the weak buses of the system, yet they vary in a non-linear manner i.e. for increasing values of load, the FVSI values first increase and then decrease.

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