Publication Type:

Conference Paper

Source:

SPEEDAM 2010, p.175-179 (2010)

Keywords:

converter-inverter system, Current control, DC-link voltage, direct driven linear permanent magnet generator, direct predictive current control method, dynamic power balancing, Electric current control, Floating buoy, Force control, grid connected wave energy converter, grid-connected three phase neutral point-clamped three level inverter, inverter switching states, inverter voltage, Inverters, invertors, linear machines, linear permanent magnet generator, magnetic translator, mathematical model, Matlab-Simulink, mechanical power conversion, Mesh generation, neutral point clamped inverter, neutral point voltage balancing, permanent magnet generators, Permanent magnets, power convertors, power factor, Power generation, Power grids, Power system modeling, predictive control, predictive current controller, Reactive power, Simulation model, three phase AC power, Unity power factor, Voltage control, wave energy extraction, Wave power extraction, wave power plants

Abstract:

In consequence of the generic irregularity of wave energy, it is difficult to envisage the performance of a grid connected wave energy converter without simulations. This paper details a study on directly driven, linear, permanent magnet generator based, wave energy extraction scheme provided with grid-connected three phase neutral point-clamped three level inverter. The linear permanent magnet generator is driven by a magnetic translator undergoing reciprocating motion with the floating buoy according to wave movement. It converts the mechanical power to three phase AC power. The converter-inverter system provides a fast, dynamic power balancing from generator to grid. The predictive current controller is used to control the three phase neutral point clamped inverter which calculates the inverter voltage required to force the load current to follow the reference. Simulation model of the system is implemented in Matlab/Simulink. The DC-link voltage is regulated by the converter. Neutral point voltage balancing is achieved through proper selection of inverter switching states. Three phase balanced current injection to the grid at unity power factor has been attained. The results obtained validate effectiveness of the predictive method of current control.

Notes:

cited By (since 1996)3; Conference of org.apache.xalan.xsltc.dom.DOMAdapter@436076b1 ; Conference Date: org.apache.xalan.xsltc.dom.DOMAdapter@72108105 Through org.apache.xalan.xsltc.dom.DOMAdapter@1986a9c4; Conference Code:81684

Cite this Research Publication

R. Krishna, Dr. Sasi K. K., and Leijon, M., “Direct predictive current control of grid connected neutral point clamped inverter for wave power extraction”, in SPEEDAM 2010, 2010, pp. 175-179.

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