Low-voltage capacitance compensating system and control method

Abstract

The invention discloses a low-voltage capacitance compensating system and a control method. The low-voltage capacitance compensating system comprises a power compensating controller, a power factor meter, a plurality of capacitors, alternating current contactors and relays, wherein the capacitors are respectively and electrically connected with the relays and the alternating current contactors, the power compensating controller is respectively and electrically connected with each alternating current contactor, the power factor meter is electrically connected with the power compensating controller, and the inside of the power compensating controller is provided with a first register, a second register, a third register, a fourth register, a detection module, a calculating module, a timing module and a switching module. The low-voltage capacitance compensating system and the control method have the advantages that the accuracy of the capacitance compensation is improved, and the electric energy is saved; the capacitors are more comprehensively protected by the electronic thermal relays; and the alarm on faults is timely carried out, so as to realize timely identification and treatment, and reduce the loss caused by the faults.

Description

technical field [0001] The invention relates to the field of reactive power compensation of electric power systems, in particular to a low-voltage capacitor compensation system and a control method capable of realizing accurate compensation of capacitance, having a long service life of the capacitor and having a remote alarm function. Background technique [0002] Low-voltage capacitor reactive power compensation cabinets have been widely used in industrial power systems, and can be applied to production equipment lines such as motors, transformers, and electric welding machines. Common capacitance compensation methods have the following disadvantages: [0003] The existing low-voltage capacitor reactive power compensation cabinet usually adopts three-phase capacitor switching compensation at the same time, which has the disadvantages of a large gap between the switching compensation capacitance and the capacitance shortage, and poor compensation effect; there is no remote a...

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Problems solved by technology

[0007] The purpose of the present invention is to overcome the deficiencies in the prior art that the capacitor compensation is not accurate enough, the capacitor is easily damaged, and has no remote alarm function, and provides a low-voltage capacitor compensation system that can realize accurate compensation of the capacitor, has a long service life of the capacitor, and has a remote alarm function and control method

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