Browsing by Author "Prakash, P.S."

Now showing 1 - 9 of 9

Design and analysis of solar photovoltaic array fed modular full-bridge DC-DC converter for 12 kW SMPC
(2018) Prakash, P.S.; Kalpana, R.; Singh, B.
This paper discusses the solar photovoltaic (SPV) array fed switched mode power converter (SMPC) using a modular full-bridge dc-dc converter as an intermediate converter. Among the different types of dc-dc converters, the straightforward and uncomplicated boost converter is selected in order to obtain the maximal power from the SPV array. The straightforward boost converter with reduced part count has inherent features of minimizing the output current ripples and possessing an unbounded region for maximum power point extraction. The improved efficiency of the converter is achieved by designing the SPV array to deliver maximum power at rated dc voltage and maximum switch utilization of the boost converter. The design, analysis and operating modes are explained for the proposed converter and the performance is validated through MATLAB/Simulink based simulation. � 2017 IEEE.
Design and implementation of sliding mode voltage controller for DC to DC buck converter by using hysteresis modulation and pulse width modulation
(2016) Kiran, B.; Parthiban, P.; Jena, D.; Prakash, P.S.
This paper presents the design and implementation of sliding mode control law to the output voltage control of DC to DC buck converter. The robustness of the sliding mode controller is tested by changing the different circuit components and comparing the results with conventional linear controller. The result shows that the sliding mode controller performs better in the transient condition over a wide range of operation when compared with linear controller. Sliding mode controllers by using hysteresis modulation and pulse width modulation are implemented in MATLAB/simulink. The disadvantages of sliding mode controller by using hysteresis modulation is overcome by using pulse width modulation. � 2016 IEEE.
Design and implementation of sliding mode voltage controller for DC to DC buck converter by using hysteresis modulation and pulse width modulation
(Institute of Electrical and Electronics Engineers Inc., 2016) Kiran, B.; Parthiban, P.; Jena, D.; Prakash, P.S.
This paper presents the design and implementation of sliding mode control law to the output voltage control of DC to DC buck converter. The robustness of the sliding mode controller is tested by changing the different circuit components and comparing the results with conventional linear controller. The result shows that the sliding mode controller performs better in the transient condition over a wide range of operation when compared with linear controller. Sliding mode controllers by using hysteresis modulation and pulse width modulation are implemented in MATLAB/simulink. The disadvantages of sliding mode controller by using hysteresis modulation is overcome by using pulse width modulation. Â© 2016 IEEE.
Harmonic Mitigation in 12-Pulse Bridge Rectifier Using DC Current Imposition Technique
(Institute of Electrical and Electronics Engineers Inc., 2020) Prakash, P.S.; Kalpana, R.; Mohankrishna, B.; Singh, B.
To enhance the ability of harmonic suppression in a 12-pulse diode bridge rectifier (DBR) using a DC side current imposition technique is proposed in this paper. The 12-pulse operation is achieved by a zigzag auto-connected transformer. The standard 12-pulse DBR does not satisfy the IEEE-519 standard and thus the current imposition technique can be used on the DC side to mitigate the input line current harmonic distortion. The current imposition circuit on DC side contains a doubler circuit along with the tapped interphase transformer (TIPT). The zigzag configured autoconnected transformer has the function to avoid zero sequence components and thereby expel the need for zero-sequence blocking transformer. When the multi-winding interphase reactor is designed optimally, the pulse number of load voltage can be increased from 12 to 24 and by using the TIPT the pulse number of output voltage can be further increased from 24 to 36. The proposed configuration is analyzed and simulated in the MATLAB Simulink and validated with hardware results. The results show that the proposed method improves the power quality by reducing the total harmonic distortion in the input line current. Â© 2020 IEEE.
High-efficiency improved 12kW switched mode telecom rectifier
(2016) Prakash, P.S.; Kalpana, R.; Singh, B.; Bhuvaneswari, G.
In this paper an improved switched mode telecom rectifier for a 12kW telecommunication system is presented. An improved telecom rectifier is a combination of phase-shift transformer based ac-dc converter and passive high pass filter. The phase-shift transformer and high pass filter is realized with a fractional magnetic rating of the load. The supply current is almost sinusoidal with low total harmonic distortion, and the power factor (PF) is close to unity. The complete design of phase-shift transformer based ac-dc converter and passive high pass filter is presented in this paper. The 12kW telecom rectifier is designed, modeled and simulated to reduce the total harmonic distortion (THD) of the input ac mains current and to improve the power factor. A laboratory prototype of phase-shift transformer based ac-dc converter is developed and the results are presented to validate the design topology. � 2015 IEEE.
Integrated full-bridge buck DC-DC converter topologies for three-phase AC mains fed SMPS
(2015) Prakash, P.S.; Kalpana, R.
In this paper the various configuration of full bridge buck dc-dc converter for three phase SMPS are presented. The design of DC-DC converter based SMPS for 12kW telecommunication system is presented and the operating modes, analysis, and design considerations are explained. Simulation results and their power quality indices are also presented to view the performance of the proposed converter. � 2015 IEEE.
Power Quality Improvement in Utility Interactive Based AC-DC Converter Using Harmonic Current Injection Technique
(2018) Prakash, P.S.; Kalpana, R.; Singh, B.; Bhuvaneswari, G.
This paper highlights the power quality issues and explains the remedial measures taken by means of hybrid front-end third harmonic current injection rectifiers. Here, a zig-zag transformer is used as the current injection device so that the advantages pertaining to the zig-zag transformer are effectively utilized. The third harmonic current injection device along with three-level boost converter at the output stage will increase the dc-link voltage. With less boost inductance, generally half of the conventional boost converter inductance is sufficient to implement the proposed converter structure resulting in reduced ripple current and also the device rating is reduced by half of the output voltage. Moreover, the power quality is well improved using third harmonic current modulated front-end structure, which is well appropriate for medium/higher power applications. The experimental prototype of hybrid front-end converter is developed in the laboratory to validate the MATLAB simulation results. � 1972-2012 IEEE.
Solar Photovoltaic Array fed Push-Pull Buck DC-DC Converter for Telecom Load
(2018) Prakash, P.S.; Kalpana, R.; Singh, B.
This paper discusses the solar photovoltaic (SPV) array fed telecom load using modular push-pull buck dc-dc converter as an intermediate converter. The straightforward boost converter with lesser number of components and single switch device has inherent features of reducing the ripples in its output current. Also, the proposed front-end structure extracts maximum power in the boundless region. The SPV array is designed such that the power at rated dc voltage is supplied to the telecon load and maximum switch utilization of boost converter is achieved which results in improved efficiency of the converter. The design and analysis are carried out for the proposed converter and the performance of the proposed system is validated using MATLAB based simulation. � 2017 IEEE.
Third Harmonic Current Injection Based Front-End AC-DC Converter for Power Quality Improvement in DC Distribution Systems
(Institute of Electrical and Electronics Engineers Inc., 2020) Prakash, P.S.; Kalpana, R.; Singh, B.
This paper presents the design and implementation of a three-phase buck type unity power factor rectifier used for distribution systems. The AC-DC converter topology considered in this paper is named as SWISS rectifier, consists of front-end three-phase diode bridge rectifier with active current injection circuit and back-end DC-DC buck converter. The characteristics of the AC-DC converter topology, including the principle of operation, modulation schemes, conduction state analysis, and control strategy are discussed in detail. Further, the analytical expression for the loss calculation is performed. Extensive simulation is carried out for the converter system, and the practicability of the converter system is verified by conducting a test on the constructed hardware prototype. Â© 2020 IEEE.