Method for short-circuit current limiting on an electrical power transmission line and configuration for short-circuit limiting
AssigneeSiemens Aktiengesellschaft
InventorWalter Muller
Life of this patent
Estimating the term…
Abstract
In order to obtain an improved operating behavior in the event of short circuits on a high-voltage line having a phase shifter, the phase shifter is used as a current limiter in the event of a fault. A fault signal, which results in an increase in an opposing voltage at an additional transformer of the phase shifter, is produced for this purpose, as a function of a fault current.
Claims8
A method for short-circuit current limiting on an electrical transmission line, which comprises:
- connecting one winding of an additional transformer of a phase shifter to an electrical high-voltage transmission line for limiting a current on the high-voltage transmission line;
- activating short-circuit current limiting at the additional transformer with a control device by passing a fault signal from a grid protective device to the control device for activation of the short-circuit current limiting upon the occurrence of a short circuit on the high-voltage transmission line;
- and
- supplying power provided by an energizer transformer from the control device to the additional transformer, and producing an opposing voltage at the additional transformer on the high-voltage line in the sense of short-circuit current limiting with an in-phase, quadrature-phase or phase-shifted voltage.
A method for short-circuit current limiting on an electrical transmission line, which comprises:
- connecting one winding of an additional transformer of a phase shifter to an electrical high-voltage transmission line for limiting a current on the high-voltage transmission line;
- detecting at least one of a fault direction and a fault location of a short circuit with a protective device, encrypting at least one of the fault direction and the fault location of the short circuit in a fault signal;
- activating short-circuit current limiting at the additional transformer with a control device by passing the fault signal from the protective device to the control device for activation of the short-circuit current limiting upon the occurrence of the short circuit on the high-voltage transmission line;
- and
- supplying power provided by an energizer transformer from the control device to the additional transformer, and producing an opposing voltage at the additional transformer on the high-voltage line in the sense of short-circuit current limiting with an in-phase, quadrature-phase or phase-shifted voltage as a function of the fault direction.
A method for phase-shifted, in-phase or quadrature-phase regulation for current limiting, which comprises:
- connecting an additional transformer of a phase shifter to a high-voltage line;
- monitoring the high-voltage line for a short circuit with a grid protective device;
- producing a fault signal upon identification of a short-circuit current;
- and
- supplying the fault signal to a control device of the additional transformer for producing an opposing voltage at the additional transformer in the sense of current limiting.
A configuration for short-circuit current limiting on an electrical transmission line, comprising:
- a protective device for detection of a short circuit on a high-voltage transmission line;
- and
- a phase shifter having:
- a converter-controlled additional transformer with one winding being connected to the high-voltage transmission line for limiting a current on the high-voltage transmission line;
- an energizer transformer for phase-shifted, quadrature-phase or in-phase regulation of power on the high-voltage transmission line;
- and
- a control device connected between said energizer transformer and said additional transformer for activation of short-circuit current limiting;
- said control device receiving a fault signal upon detection of a short circuit by said protective device, and an opposing voltage being produced at said additional transformer in the sense of short-circuit current limiting with an in-phase, quadrature-phase and phase-shifted voltage.
Dependencies are inferred from the claim text.