Improved firefly algorithm based optimal design of special signal blocking IIR filters

Controlled energization procedures of power transformers

This paper presents a novel approach to mitigate the inrush current by using Point On Wave (POW) switching technique. The proposed technique is used to limit the inrush current while energizing the transformer. An algorithm is developed using EMTP/PSCAD software and the prototype with the proposed algorithm is built in the laboratory. It is tested by using DSP TMS320F28069 controller. The simulation and hardware results are presented to validate the capability of the proposed system.

Reduction of inrush current using point on wave switching in power transformers

This paper focuses on controlling the voltage of PWM AC/AC voltage converter and the use of Real Coded Genetic Algorithm to eliminate selected harmonics from output voltage. The fundamental component of the output voltage can be linearly controlled using the proposed method and harmonics can be completely eliminated up to a specified order. The Real Coded Genetic algorithm generates the best switching angles for a particular output voltage desired by the user with minimum total harmonic distortion (THD). THD values for different output voltages have been tabulated for 3rd and 5th harmonic orders.

Selective harmonic elimination for PWM AC/AC voltage converter using real coded genetic algorithm

A common 400 V dc bus for industrial motor drives advantageously allows the use of high-performance 600 V power semiconductor technology in the inverter drive converter stages and to lower the rated power of the supplying rectifier system. Ideally, this supplying rectifier system features unity power factor operation, bidirectional power flow and nominal power operation in the three-phase and the single-phase grid. This paper introduces a novel bidirectional universal single-/three-phase-input unity power factor differential ac-dc converter suitable for the above mentioned requirements. The basic operating principle and conduction states of the proposed topology are derived and discussed in detail. Then, the main power component voltage and current stresses are determined and simulation results in PLECS are provided. The concept is verified by means of experimental measurements conducted in both three-phase and single-phase operation with a 6 kW prototype system employing a switching frequency of 100 kHz and 1200 V SiC power semiconductors. 

https://onlinelibrary.wiley.com/doi/pdfdirect/10.1049/ell2.12857

Saransh Chhawchharia

Papers

Reduction of inrush current using point on wave switching in power transformers

Selective harmonic elimination for PWM AC/AC voltage converter using real coded genetic algorithm

Novel bidirectional universal 1‐phase/3‐phase‐input unity power factor differential AC/DC converter

A Universal Approach to Solar Photovoltaic Panel Modeling