Informatics Publishing Limited

T. D. Sudhakar ¹

Affiliations
1 Electrical and Electronics Department, St. Joseph’s College of Engineering, Chennai, IN

Abstract

Network reconfiguration is a process of changing the status of the sectional and tie switches. The aim of network reconfiguration of the distribution network is to minimize the losses for a load arrangement at a particular time. Thus the objective function is to minimize the losses of the network by satisfying the distribution network constraints. The constraints considered in this paper are radiality and voltage limits. In this paper the status of the switches is obtained by using Harmony Search Algorithm (HSA). A HSA is a conceptualized using the musical process of searching for a perfect state of harmony. HSA, a relatively recent meta-heuristic optimization algorithm based on the music improvisation process of musicians, is applied to the reconfiguration problem. The proposed methodology has three stages. In stage one HSA is used to find the tie switches, in stage two the identified tie switches is checked for radiality constraint and if the radilaity constraint is satisfied then the procedure is proceeded to stage three otherwise the process is repeated. In stage three then load flow analysis is done. The process is repeated unless the losses are minimized. The HSA is to be implemented to find the power flow path and the Forward Sweeper algorithm is to be used to calculate the power flow parameters. The proposed methodology is to be applied to a 33-bus single feeder and 16-bus three feeder distribution network using MATLAB.

Keywords

Network Reconfiguration, Harmony Search Algorithm, Loss Reduction, Voltage Profile.

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T. V. Narmadha ¹, J. Velu ², T. D. Sudhakar ¹

Affiliations
1 Department of EEE, St Joseph’s College of Engineering, Chennai - 600119, Tamil Nadu, IN
2 Anugraha Power Systems, Chennai - 600097, Tamil Nadu, IN

Abstract

Objectives: The paper presents design and analyze of PV based Super-lift Luo converter with different controllers in the modern technology of DC-DC converter. Methods: The Luo converter provides output voltage which is positive from positive source voltage. By using this converter power density obtained is high with less ripple content in voltage and current profile. It is proven from the Mathematical modeling that the output voltage increases in geometric progression, thereby efficiency of the converter increases. The controller parameters in PI controller are tuned using Ziegler Nichols tuning algorithm. The paper proposes a design of hybrid controller which gives good transient performance compared with conventional PI controller. Findings: Using Simulink the proposed converter with its control circuit is implemented. The main advantage of this proposed converter based on photo voltaic system is that it produces voltages increasing in geometric progression. The converter has proved to be robustness around the operating point. In various operating condition, the dynamic performance with input voltage variations and load fluctuation is good. The simulation performance closely coincides with the theoretical analysis. The settling time and overshoot obtained using hybrid controller is compared with fuzzy controller and conventional controller and it is proven that hybrid controller has good dynamic performance. The real time implementation with solar PV cell is also carried out. Applications/Improvements: The converter finds wide application in switch mode power supply and speed control of DC motors.

Keywords

Fuzzy Logic Controller, Peak Overshoot, Photo Voltaic (PV) Cells, PI Controller, Settling Time, Super Lift Converter.

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T. D. Sudhakar ¹, M. Raja Rajan ², K. N. Srinivasan ³, R. Raja Prabu ⁴, T.V. Narmadha ¹, M. Mohana Krishnan ⁵

Affiliations
1 Department of Electrical and Electronics Engineering, St. Joseph’s College of Engineering, Chennai – 600119, Tamil Nadu, IN
2 Department of Electrical and Electronics Engineering, Jerusalem College of Engineering Chennai – 600100, Tamil Nadu, IN
3 Department of Electrical and Electronics Engineering, BS Abdur Rahman University, Chennai – 600048, Tamil Nadu,, IN
4 Department of Electrical and Electronics Engineering, BS Abdur Rahman University, Chennai – 600048, Tamil Nadu, IN
5 Department of Power Electronics and Drives, SSN College of Engineering Chennai – 603110, Tamil Nadu, IN

Abstract

Background: Due to increasing power demand across the country, the usage of renewable systems is being increased. One such efficient and compactly available renewable energy is solar power. In this paper, a clear view of harnessing maximum DC solar power output and converting it to AC is discussed. Methods: A method of grid interconnection of solar powered inverter is presented with IEEE-15 bus system as an example model using Matlab simulation. Findings: A detailed analysis of bus voltage, load current and line current is made with the simulated model. Applications/Improvements: The data obtained could be used for fine optimization of the position in which the distribution generator interconnection is to be made.

Keywords

IEEE-15, Grid Interconnection, Solar Power

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