Power Research

K. Sornalatha ¹, N. Rajkumar ¹, K. Pradeep ¹, C. Viswanatha ², Giridhar P. Kini ³

Affiliations
1 Energy Efficiency and Renewable Energy Division, Cental Power Research Institute, Bangalore-560 080, IN
2 Diagnostics Cables and Capacitors Division, Central Power Research Institute, Bangalore 560 080, IN
3 Dept. of Electrical and Electronics Engg., Manipal institute of technology, Manipal,Karnataka- 576 104, IN

Abstract

This paper throws light on application of synchronised phasor measurement in renewable energy systems. Power generation from renewable energy system connected to the grid is highly dynamic, nonlinear which needs to be monitored continuously for efficient and reliable system. There are various methods of monitoring of power from renewable energy system to grid. Nowadays, Time synchronisedphasormeasuring method proves to be a revolutionary method for power system monitoring. Synchronised PMU has wide application such as wide area monitoring, Real time monitoring, post even analysis, visualization, state estimation etc. They are employed in micro grid and distributed generation plants mainly for solving islanding issues. This paper summarises the synchrophasor application and its future scope in renewable energy system.

Keywords

Phasor Measurement Unit (PMU), Synchrophasor, Real-time Monitoring, State Estimation, Islanding

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K. J. Shruthi ¹, Rajashekar P. Mandi ¹, C. Viswanatha ², Giridhar P. Kini ³

Affiliations
1 Energy efficiency and Renewable Energy Division (ERED), Central Power Research Institute, Bangalore - 560 080, IN
2 Diagnostics Cables and Capacitors Division (DCCD), Central Power Research Institute, Bangalore - 560 080, IN
3 Professor, Electrical and Electronics Engineering Dept., Manipal Institute of Technology, Manipal - 576 104, IN

Abstract

This paper discusses the various inverter topologies used in solar photovoltaic system for electrical energy. This paper gives comparison between the conventional type of inverters i.e. voltage source inverter (VSI) and current source inverter (CSI) .New z-source inverter topology is proposed which will overcome the drawbacks in VSI and CSI. Pulse width modulated (PWM) signals are generated for the power semiconductor switches of the z-source inverter for controlling the power to the grid. The characteristics of this inverter are used to obtain maximum power tracking control and delivering to the grid.

Keywords

Inverter, Photovoltaic (PV) System, z-source network, pulse width modulation (PWM)

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

Affiliations
1 Energy Efficiency and Renewable Enenrgy Division, Central Power Research Institute, Bangalore- 560 080, IN
2 E&E department, Manipal Institute of Technology, Manipal 576104, IN
3 Diagnostics Cables and capacitors Division, Central Power Research Institute, Bangalore 560 080, IN
4 Energy Efficiency and Renewable Enenrgy Division, Central Power Research Institute, Bangalore -560 080, IN

Abstract

All newly designed power electronic equipments are to be tested as per the standards, so as to verify the response of the equipment under various load conditions. For this, different linear, non-linear and dynamic loads are to be applied to the equipment in accordance with the applications. Load emulation is the process by which the actual load is replaced by a flexible system which can mimic the characteristics of the actual load. A regenerative operation can be implemented in power electronic emulators. Thus by using load emulators for testing, the energy lost in testing of equipments can be reduced to a great extent. Here a review of various types of load emulators is presented which are intended for various types of applications along with some experimental results obtained in various research studies.

Keywords

Load Emulation, Non-linearity, Power Regeneration, Phase Locked Loop

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