DEVICE OF REACTIVE POWER COMPENSATION Russian patent published in 2013 - IPC H02J3/18 

FIELD: electricity.

SUBSTANCE: device comprises a shunting capacitor tank of static capacitors, including serially connected capacitors, one input of the tank is connected to a linear bus, and the other input - to grounding, a closing breaker connected in parallel to a part of capacitors arranged at the side of the grounded input, besides, one input of the breaker is connected on the ground potential, and a controlled shunting reactor. At the same time the ratio of capacities of the controlled shunting reactor and a part of the capacitor tank meets the following condition: Q_csr≥Q_sct, where Q_csr - controlled reactor capacity, and Q_sct - capacity of a shunting capacitor tank of static capacitors with the disconnected closing breaker. The range of reactive power variation is expanded (instead of the range from -Q_sctmax to 0, there is a range from -Q_sctmax to +Q_csr).

EFFECT: improved quality of grid voltage stabilisation and additional reduction of power losses in a grid and in a load.

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