Switching arrangement for increasing stability in a...

Details Switching arrangement for increasing stability in a... Switching arrangement for increasing stability in a...

Category

H - Electricity

Subcategory

02

Subsubcategory

P

CPC

322/7

IPC codes

H02P 9/00 (2006.01) H02J 3/24 (2006.01)

Type

Patent

Patent number

CA 1232012

Description

SWITCHING ARRANGEMENT FOR INCREASING STABILITY IN A POLYPHASE [E.G., 3-PHASE] POWER SYSTEM FED BY A GENERATOR ABSTRACT OF THE DISCLOSURE Subsynchronous oscillations in a polyphase power network can be effectively damped with a switching arrangement having a thyristor-switched regulation and a phase shifting polyphase power system. The arrangement is controllable and is periodic in nature, being responsive to a measurement signal representing a physical parameter of the subsynchronous oscillations. This signal preferably represents the difference between the instantaneous rotational frequency of the generator and a set-point value for that frequency. Control windings are connected in series with the power-network-side polyphase windings of a block transformer. Voltages induced in these control windings are phase shifted with respect to the voltages in the respective associated power-network-side polyphase windings of the block transformer. These voltages in the control windings produce a very effective damping torque on the generator, to damp out the subsynchronous oscillations.

Application Number

451550

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