Publication Type:

Conference Paper


SPEEDAM 2010 - International Symposium on Power Electronics, Electrical Drives, Automation and Motion, Pisa, p.175-179 (2010)





AC generator motors, Ac power, Computer simulation, Controllers, Current control, Current controller, Current injections, DC power transmission, DC-link voltages, Dynamic Power, Electric current control, Electric inverters, Electric power factor, Floating buoy, Grid-connected, Inverter switchings, Inverter system, Linear permanent magnet, Load currents, Magnetic devices, MATLAB /simulink, Mechanical power, Neutral point clamped inverters, Neutral points, Neutral-point voltage balancing, Permanent magnet generator, Permanent magnets, Power converters, Power electronics, Power extraction, Predictive current control, Predictive methods, Reciprocating motion, Simulation model, Three phase, Three-level inverters, Unity power factor, Wave energy, Wave energy conversion, Wave energy converters, Wave power, Wave power extraction


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. © 2010 IEEE.


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

Ra Krishna, Kottayil, S. Kb, and Leijon, Ma, “Direct predictive current control of grid connected neutral point clamped inverter for wave power extraction”, in SPEEDAM 2010 - International Symposium on Power Electronics, Electrical Drives, Automation and Motion, Pisa, 2010, pp. 175-179.