An Approximate Power Flow for Distribution Systems

2014 ◽  
Vol 12 (8) ◽  
pp. 1432-1440 ◽  
Author(s):  
Antonio Jose Gil Mena ◽  
Juan Andres Martin Garcia
Keyword(s):  
Power Flow ◽  
Distribution Systems ◽  
Approximate Power

Optimal Capacitors Placement of Distribution Systems Using 2nd Order Power Loss Sensitivity Analysis and Hierarchical Clustering

2014 ◽  
Vol 986-987 ◽  
pp. 377-382 ◽  
Author(s):  
Hui Min Gao ◽  
Jian Min Zhang ◽  
Chen Xi Wu
Keyword(s):  
Sensitivity Analysis ◽  
Hierarchical Clustering ◽  
Distribution System ◽  
Power Flow ◽  
Distribution Systems ◽  
Reactive Power ◽  
Digital Simulation ◽  
Second Order ◽  
First Order ◽  
The Impact

Heuristic methods by first order sensitivity analysis are often used to determine location of capacitors of distribution power system. The selected nodes by first order sensitivity analysis often have virtual high by first order sensitivities, which could not obtain the optimal results. This paper presents an effective method to optimally determine the location and capacities of capacitors of distribution systems, based on an innovative approach by the second order sensitivity analysis and hierarchical clustering. The approach determines the location by the second order sensitivity analysis. Comparing with the traditional method, the new method considers the nonlinear factor of power flow equation and the impact of the latter selected compensation nodes on the previously selected compensation location. This method is tested on a 28-bus distribution system. Digital simulation results show that the reactive power optimization plan with the proposed method is more economic while maintaining the same level of effectiveness.

Backward-Forward Sweep Based Power Flow Algorithm in Distribution Systems

2020 ◽  
pp. 365-382
Author(s):  
Farkhondeh Jabari ◽  
Farnaz Sohrabi ◽  
Pouya Pourghasem ◽  
Behnam Mohammadi-Ivatloo
Keyword(s):  
Power Flow ◽  
Distribution Systems ◽  
Flow Algorithm

scholarly journals Soft Switching of Full-Bridge DC-DC Buck Converter

2020 ◽  
pp. 561-565
Keyword(s):  
Power Systems ◽  
Power Flow ◽  
Distribution Systems ◽  
Buck Converter ◽  
Soft Switching ◽  
Power Supplies ◽  
Power Circuit ◽  
Zero Voltage Switching ◽  
Zero Current Switching ◽  
Zero Current

The conventional Bidirectional Full-bridge dc -dc converter is inefficient and may not be practical for the low power applications. This paper specifies an efficient DC-DC Converter that avoids power losses by using soft switching techniques like Zero Voltage Switching and Zero Current switching. The soft switching of Bidirectional Full-bridge DC-DC Converter operates as a buck converter when the power is positive and as a boost converter when the power flow is negative. Applications of soft switching Bidirectional Full-bridge DC-DC Converter are uninterrupted power supplies (UPS), distribution Systems, battery charger circuits, telecom power supplies, computer power systems. Detailed analysis of the converter is carried out in buck mode to obtain relations between the power circuit parameters. Based on the analysis, control schemes are described to operate the converter. The proposed full bridge DC-DC converter is simulated in Buck mode using MATLAB /SIMULINK.

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