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US 7,843,176 B2Granted
Apparatus and method for improved power flow control in a high voltage network
AssigneeABB Research Ltd.
InventorsBertil Berggren, Mojtaba Noroozian
Life of this patent
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Abstract
An apparatus for controlling the power flow in a high voltage network. A phase shifting transformer includes a tap changer.
Claims19
An apparatus for controlling a power flow in a high voltage network, comprising
- a phase shifting transformer, comprising a tap changer,
- a controlled series compensator containing a controllable inductor unit, and
- a control unit configured to control the phase shifting transformer and the controlled series compensator in coordination.
A method for controlling a power flow in a high voltage network having a control apparatus including a phase shifting transformer, the method comprising:
- adjusting in a first period of time a reactance of the control apparatus by a controlled series compensator, and
- adjusting in a second period of time a voltage of the phase shifting transformer and the reactance of the control apparatus to achieve a favorable working balance between the phase shifting transformer and the controlled series compensator.
A computer program product, comprising:
- a computer readable medium;
- and
- computer program instructions recorded on the computer readable medium and executable by a processor to carry out a method comprising adjusting in a first period of time a reactance of a control apparatus by means of a controlled series compensator, and adjusting in a second period of time a voltage of a phase shifting transformer and the reactance of the control apparatus to achieve a favorable working balance between the phase shifting transformer and the controlled series compensator.
Dependencies are inferred from the claim text.