STATIC COMPENSATOR AND METHOD FOR CONTROLLING THEREOF
First Claim
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1. A static compensator comprising:
- a transformer connected with a bus of a power system;
an inverter operating according to a control signal and connected to the transformer in series;
a tap changer changing turn ratio of the transformer; and
a controller generating the control signal to operate the inverter and generating a tap up or a tap down signal to provide to the tap changer.
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Abstract
The present invention relates to a static compensator and a method for controlling thereof, more particularly, to a static compensator including a transformer connected with a bus of a power system; an inverter operating according to a control signal and connected to the transformer in series; a tap changer changing turn ratio of the transformer; and a controller generating the control signal to operate the inverter and generating a tap up or a tap down signal to provide to the tap changer and a method for controlling thereof.
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Citations
9 Claims
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1. A static compensator comprising:
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a transformer connected with a bus of a power system; an inverter operating according to a control signal and connected to the transformer in series; a tap changer changing turn ratio of the transformer; and a controller generating the control signal to operate the inverter and generating a tap up or a tap down signal to provide to the tap changer. - View Dependent Claims (2, 3, 4, 5)
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6. A method for controlling a static compensator comprising:
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(a) inputting a bus voltage of a power system; (b) comparing the bus voltage with a predetermined reference; (c) extracting an integrated value by integrating the bus voltage when the bus voltage is higher than the reference; (d) comparing the extracted integrated value with a predetermined excessive integration threshold value; and (e) providing a tap up signal to a tap changer of a transformer when the integrated value is equal to or higher than the excessive integration threshold value to change a turn ratio of the transformer. - View Dependent Claims (7)
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8. A method for controlling a static compensator comprising:
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(a) inputting a bus voltage of a power system; (b) comparing the bus voltage with a predetermined reference; (c) extracting an integrated value by integrating the bus voltage when the bus voltage is smaller than the reference; (d) comparing the extracted integrated value with a predetermined excessive integration threshold value; and (e) providing a tap down signal to a tap changer of a transformer when the integrated value is equal to or higher than the excessive integration threshold value to change a turn ratio of the transformer. - View Dependent Claims (9)
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Specification