Informatics Publishing Limited

Vani Vijay ¹, P. Giridhar Kini ², C. Viswanatha ³, S. Jothi Basu ⁴

Affiliations
1 Energy Efficiency and Renewable Enenrgy Division, Central Power Research Institute, Bangalore - 560080, IN
2 E&E Department, Manipal Institute of Technology, Manipal - 576104, IN
3 Diagnostics Cables and capacitors Division, Central Power Research Institute, Bangalore - 560080, IN
4 Energy Efficiency and Renewable Energy Division, Central Power Research Institute, Bangalore - 560080, IN

Abstract

AC-DC converters are very commonly used in many power electronics applications including controllable sources and machine drives. Rectifier circuit results in harmonic distortions in AC side and requires large capacitive filter for reducing DC ripples on the output side. Use of active power factor technique can be utilized for solving this issue resulting in better performance of the converter. It basically consists of boost converter with high frequency switching following the rectifier controlled using a suitable microcontroller. This paper presents the detailed design and operation of Active power factor corrected rectifier which operates with reduced THD and improved power factor there by reducing losses in power flow and utility. Simulation of the designed converter and comparison with conventional topology is also discussed.

Keywords

Rectifier; active power factor correction, capacitive filtering

Full Text

     

Vani Vijay ¹, P. Giridhar Kini ², C. Viswanatha ³, S. Jothi Basu ⁴

Affiliations
1 Energy Efficiency and Renewable Enenrgy Division, Central Power Research Institute, Bangalore-560080, IN
2 E & E Department, Manipal Institute of Technology, Manipal-576104, IN
3 Diagnostics Cables and capacitors Division, Central Power Research Institute, Bangalore-560080, IN
4 Energy Efficiency and Renewable Energy Division, Central Power Research Institute, Bangalore-560080, IN

Abstract

Inverter and power conditioning circuit is the most important part of solar PV system which is responsible for providing the AC output as per the requirement of the application. The presence of AC harmonics and DC ripples in the inverter is still an unavoidable drawback, even though it has reduced to a great extent in past two decades. This paper presents a detailed study of distortions in the AC and DC sides of commercial standalone single phase Solar PV inverter and the effect of the same in the application. The harmonic content is evaluated by loading the inverter using electronic loading. The reduction in distortions in the AC and DC sides by utilization of a high impedance network on the DC side of the inverter is also evaluated by simulation. A comparative study of harmonics and DC ripples in the inverter under test and the simulated impedance source inverter is also presented.

Keywords

Harmonics, Stand alone Solar PV inverters, DC ripples, Impedance network

Full Text

     

Vani Vijay ¹, Kini P. Giridhar ², C. Viswanatha ³, S. Jothi Basu ⁴

Affiliations
1 Energy Efficiency and Renewable Enenrgy Division, Central Power Research Institute, Bangalore- 560080, IN
2 E&E department, Manipal Institute of Technology, Manipal 576104, IN
3 Diagnostics Cables and capacitors Division, Central Power Research Institute, Bangalore 560080, IN
4 Energy Efficiency and Renewable Energy Division, Central Power Research Institute, Bangalore -560080, IN

Abstract

Back to back converters are used in many applications including machine drives and HVDC links. It is a combination of AC to DC and DC to AC converters with topologies suitable for the application. Here a single phase converter topology is developed by combining a Z source network and HERIC inverter which operates with lesser losses and more controllability. Compared to conventional inverter model, the conduction losses are much less in HERIC configuration. The Z source network help in boosting the DC voltage level so as to obtain the required level of AC output. This back to back converter is mainly meant for regenerative load application which can be utilized in equipment testing. The power drawn by the converter can be regenerated to supply back to the utility grid there by it is possible to conduct equipment testing without wasting energy. The details of the proposed configuration and the output wav forms are explained. Also a comparative study of the losses in conventional converter and proposed converter is presented.

Keywords

Back to back converter, HERIC inverter, Z source nettwork, regenerative load

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