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Current Source Inverter for a 400 kW Ocean Waves Induction Generator
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| Author(s) |
C. Joao Ramos; P. Moreira da Silva; A. Carvalho |
| Abstract |
Electrical energy generated from the ocean waves is a renewable energy being developed. One form
of retrieving this energy is using the Oscillating Water Column (OWC) principle.
In order to optimise this energetic resource, the electric generator must work at variable speed
depending on the input power. For the energy to be delivered to mains, the voltage magnitude and
frequency must be constant.
This paper describes a system that uses a generator based on a wound induction machine with slip
energy recovery, which allows operation with variable speed and direct connection to the mains.
The Slip Energy Recovery System (SERS) is based on a wound induction machine being controlled
through the amount of rotor energy delivered to the mains by means of a static converter.
The AC variable rotor voltage is converted to DC voltage with a rectifier groupment and then
converted again to AC in order to be injected into mains.
The use of an IGBT Current Source Inverter (CSI) as DC-AC converter minimises current harmonics
and allows smooth interaction between the random and variable input power and the mains.
The main advantage of this system is the ability to generate 400 kW using a 200 kW machine and a
200 kW CSI.
The prototype appears as an important development due to work with a large renewable energy
source at a significant power level. The good performance carried out by the equipment based on an
induction generator is reached through a well-controlled IGBT based current inverter that is presented
within this paper. |
| Download |
| Filename: | EPE1999 - PP00172 - Ramos.pdf |
| Filesize: | 218.7 KB |
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| Type |
Members Only |
| Date |
Last modified 2004-04-05 by System |
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