Apparatus for removing harmonic components of an electric power frequency generated in electric power generation equipment
First Claim
1. An apparatus for removing harmonic components of electric power frequency generated in electric power equipment, said apparatus comprising:
- a first electric generator;
a second electric generator;
a first frequency converter connected to said first and second generators;
a second frequency converter connected to said first and second generators;
means for supplying electricity from an electric power system to said first and second frequency converters, to supply variable-voltage, variable-frequency electric power to a selected one of said first and second generators to make said selected one of said generators operate as a motor, to thereby start said selected one of said generators;
a first transformer connected to said first generator;
a second transformer connected to said second generator;
switching means for alternatively connecting a selected one of said first transformer and said second transformer to the electric power system, to supply electric power from the selected one of said first and second generators to the electric power system;
a detector for detecting harmonic components of an electric power frequency contained in the electric power supplied from said first frequency converter to the selected one of said first and second generators; and
an active filter for removing the harmonic components of the electric power frequency contained in the electric power supplied from said first frequency converter, said active filter including said second frequency converter.
1 Assignment
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Accused Products
Abstract
In a generator starting apparatus, in which commercial frequency electric power supplied from an electric power system is converted into variable-voltage variable-frequency electric power to thereby start a gas turbine generator, a harmonic-component removing apparatus is provided which removes harmonic components contained in the converted variable-voltage variable-frequency electric power on the basis of the detected harmonic components. In addition, an apparatus for removing harmonic components generated in an electric power equipment is provided, wherein harmonic components contained in an electric power system are detected so that they may be removed.
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Citations
7 Claims
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1. An apparatus for removing harmonic components of electric power frequency generated in electric power equipment, said apparatus comprising:
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a first electric generator; a second electric generator; a first frequency converter connected to said first and second generators; a second frequency converter connected to said first and second generators; means for supplying electricity from an electric power system to said first and second frequency converters, to supply variable-voltage, variable-frequency electric power to a selected one of said first and second generators to make said selected one of said generators operate as a motor, to thereby start said selected one of said generators; a first transformer connected to said first generator; a second transformer connected to said second generator; switching means for alternatively connecting a selected one of said first transformer and said second transformer to the electric power system, to supply electric power from the selected one of said first and second generators to the electric power system; a detector for detecting harmonic components of an electric power frequency contained in the electric power supplied from said first frequency converter to the selected one of said first and second generators; and an active filter for removing the harmonic components of the electric power frequency contained in the electric power supplied from said first frequency converter, said active filter including said second frequency converter. - View Dependent Claims (2, 3, 4, 5, 6)
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7. An apparatus for removing harmonic components of electric power generated in electric power equipment, said apparatus comprising:
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a first electric generator; a second electric generator; a first frequency converter connected to an electric power system to provide variable-voltage, variable-frequency electric power; first switching means for connecting said first frequency converter to a selected one of said first and second generators to make said selected one of said generators operate as a motor, to thereby start said selected one of said generators; a first transformer connected to said first generator; a second transformer connected to said second generator; second switching means for connecting a selected one of said first transformer and said second transformer to the electric power system, to supply electric power as generated by the selected one of said first and second generators to the electric power system; a detector for detecting harmonic components contained in the electric power supplied from said first frequency converter to the selected one of said first and second generators; and an active filter for removing the detected harmonic components, said active filter including a second frequency converter connected to said first and second generators and means for supplying electricity from the electric power system to said second frequency converter.
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Specification