Reactive capacitance compensation cabinet

Abstract

The invention discloses a reactive capacitance compensation cabinet which comprises a cabinet body, wherein the cabinet body is internally provided with a plurality of three-phase compensation units, a plurality of split phase compensation units, a breaker and a controller; each the three-phase compensation unit comprises three compensation single-phase circuits; the compensation single-phase circuits comprise fuses, reactors, switching switches and capacitors that are electrically connected sequentially; the three compensation single-phase circuits adopt delta connection; each split phase compensation unit comprises three split compensation single-phase circuits; the three split compensation single-phase circuits adopt star connection; the three-phase compensation units and the split phase compensation units are connected with an outside three-phrase power grid by the breaker; the switching switches are connected with the controller; and the controller is connected with a detection unit for detecting current signals and voltage signals of the three-phrase power grid. The compensation cabinet combines three-phase compensation and split phase compensation, and can conduct intelligent switching conversion and automatic combined configuration, and inhibit and filter harmonic waves.

Description

technical field [0001] The invention relates to a reactive capacitance compensation cabinet, which can be used in conjunction with a low-voltage power distribution cabinet. Background technique [0002] At present, enterprises consume a lot of electricity and have high requirements, and there are more and more inductive devices in the terminal power consumption equipment. The original reactive capacitor compensation cabinet has a single compensation and can only compensate for three phases; the response time is slow, and the response is second-level; The electrical components of the main circuit are AC contactor + capacitor, the three-phase imbalance, the grid harmonics cause the service life of the capacitor to be short, or the capacitor capacity that needs to be switched is adjusted accordingly due to frequent changes in the terminal load capacity, and the compensation is not in place. There is no effect, and overcompensation has a negative impact on the entire grid. Con...

AI Technical Summary

Problems solved by technology

[0002] At present, enterprises consume a lot of electricity and have high requirements, and there are more and more inductive devices in the terminal power consumption equipment. The original reactive capacitor compensation cabinet has a single compensation and can only compensate for three phases; the response time is slow, and the response is second-level; The electrical components of the main circuit are AC contactor + capacitor, the three-phase imbalance, the grid harmonics cause the service life of the capacitor to be short, or the capacitor capacity that needs to be switched is adjusted accordingly due to frequent changes in the terminal load capacity, and the compensation is not in place. No effect, and overcompensation has a negative impact on the entire grid

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