Micro-controller based emulation of a wave energy converter
23 Mar 2011-pp 186-189
TL;DR: A Permanent Magnet Synchronous Generator (PMSG) based adjustable speed energy extracting scheme is employed so as to operate the air-turbine close to its Maximum Power Point operation.
Abstract: Ocean wave energy has not yet gained popularity as a renewable energy source because of intermittent nature of available wave power. Still deriving a constant power at the output, requires embedding of energy storage devices of sufficient capacity into the wave energy converter. A Permanent Magnet Synchronous Generator(PMSG) based adjustable speed energy extracting scheme is employed so as to operate the air-turbine close to its Maximum Power Point operation. The variable voltage variable frequency AC supply generated by the PMSG is processed by a diode bridge- VSI cascade, to generate usable regulated AC supply. In order to estimate the energy storage requirement, especially under different climatic conditions, the emulation of the DC bus voltage dynamics is required. Considering typical wave height, wave period and differential pressure/ wave power variation applicable to the site of Indian wave energy plant, off-line computation of the DC bus voltage dynamics is carried out using MATLAB based transient model of the complete wave energy converter. Finally, the results obtained from the emulation carried out employing micro-controller P89V51RD2 are given.
Citations
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22 Mar 2021
TL;DR: This paper proposed a test bench device to emulate or simulate the electrical impulses of a wave energy converter (WEC) in the form of an emulator to assess the performance, which, in this case, is the output power.
Abstract: This paper proposed a test bench device to emulate or simulate the electrical impulses of a wave energy converter (WEC). The objective of the study is to reconstruct under laboratory conditions the dynamics of a WEC in the form of an emulator to assess the performance, which, in this case, is the output power. The designed emulator device is programmable, which makes it possible to create under laboratory conditions the operating mode of the wave generator, identical to how the wave generator would work under real sea conditions. Any control algorithm can be executed in the designed emulator. In order to test the performance of the constructed WEC emulator, an experiment was conducted to test its power output against that of a real point-absorber WEC. The results indicate that, although the power output for that of the real WEC was higher than the WEC emulator, the emulator performed perfectly well. The relatively low power output of the emulator was because of the type of algorithm that was written for the emulator, therefore increasing the speed of the motor in the algorithm (code) would result in higher output for the proposed WEC emulator.
15 citations
14 Mar 2019
TL;DR: In this paper, wave energy generation by the simultaneous model of wave energy generator (WEG) and numerical analysis is discussed, where the floaters are forced to oscillate when ocean waves pass by, thus translator oscillates at the stator field converting the power of ocean waves into electrical energy.
Abstract: Ocean energy is the utmost economically realistic solution for providing energy to the inshore areas. Wave energy generation by the simultaneous model of wave energy generator (WEG) and numerical analysis is being discussed. The concept of renewable energy is to convert various energy into electrical energy. Ocean wave energy is one of them which convert mechanical stress into electric energy. Installing WEG at inshore areas can be generated power, without consuming fuel and other resources. To analyze the mechanical system of WEG transform into the electrical circuit and enhance the accuracy and analysis method for wave energy. The floaters are forced to oscillate when ocean waves pass by, thus translator oscillates at the stator field converting the power of ocean waves into electrical energy.
1 citations
References
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15 May 2005
TL;DR: In this article, an impulse turbine is used to convert differential air pressure due to the oscillating water column into mechanical shaft power, which is rectified to DC by a diode bridge.
Abstract: Despite several wave energy plants based on oscillating water column concept having been tested worldwide, wave energy has not yet gained popularity as a renewable energy source because of highly intermittent nature of available wave power. Still maintaining a constant voltage and frequency at the output, requires embedding of energy storage devices of sufficient capacity into the system. As the first stage, an impulse turbine is used to convert differential air pressure due to the oscillating water column into mechanical shaft power. A permanent magnet based alternator driven by this turbine generates variable voltage variable frequency AC, which is rectified to DC by a diode bridge. At the second stage, a DC motor - alternator set converts this into fixed frequency, fixed voltage AC acceptable as a utility AC supply. Employing MATLAB-Simulink based steady-state model of the plant and assuming an adjustable load, PID control of the output load is carried out in order to estimate the energy storage requirement especially under different climatic conditions
16 citations
01 Jan 1997
4 citations
TL;DR: In this article, the power take-off mechanism of the oscillating water column based Indian wave energy plant is based on an impulse turbine-permanent magnet synchronous generator (PMSG) set.
Abstract: The power take-off mechanism of the oscillating water column based Indian wave energy plant is based on an impulse turbine-permanent magnet synchronous generator (PMSG) set. The MATLAB based simulation of the dynamic model of this power module, considering the plant's operation on the stand-alone mode, is developed incorporating a machine variable model for the PMSG used. It is shown that the energy efficiency of the impulse turbine can be substantially increased by adjusting the load resistance dynamically, as a function of the input differential pressure.
1 citations