CURRENT LIMITING DEVICE OF ELECTRIC NETWORK Russian patent published in 2009 - IPC H02H9/00 

FIELD: electricity.

SUBSTANCE: there proposed is current limiting device (mainly three-phase) of electric network in the form of two parts with earth neutral wire, each of the phases of which contains linear current limiting reactor and capacitor battery. Current limiting reactor is in-series connected to network and one of its ends is connected to one part of network. In addition, capacitor battery and two controlled shunt reactors are introduced to the device. The second end of linear current limiting reactor is connected to the second part of network, one capacitor battery and shunt reactor are connected in parallel and connected to one reactor end and to earth neutral wire, the other capacitor battery and the other shunt reactor are connected in parallel and connected to the other reactor end as well as to neutral wire. Recommended ratio of sizes and parametres of current limiting reactor, power of capacitor battery of each electric network part, and nominal power of controlled reactor of each electric network part are described. Any high value of inductive resistance of current limiting reactor can be chosen so that short circuit current is not more than standard one because reactive power sources allow compensating voltage decrease.

EFFECT: increasing technological capabilities.

2 cl, 2 dwg