Low-voltage capacitance compensation cabinet

Abstract

The invention relates to a low-voltage capacitance compensation cabinet. The low-voltage capacitance compensation cabinet comprises a cabinet door and a cabinet body; the cabinet door and the cabinetbody are connected through hinges; a top plate is arranged on the upper end plane of the cabinet body; a bottom plate is arranged on the lower end plane of the cabinet body; interlayer plates are arranged between the top plate and the bottom plate; the interlayer plate main body consists of cross beams; long circular holes are formed in the cross beams; multiple groups of three-phase co-compensation units are arranged in the cabinet body; an anti-thunder unit is arranged in the cabinet body; each three-phase co-compensation unit comprises three co-compensation single-phase circuits correspondingly connected with three phases of power grids; each co-compensation single-phase circuit comprises a fuse, an intermediate relay, a thermal relay and a capacitance compensation unit which are electrically connected in sequence; the anti-thunder unit comprises anti-thunder devices connected with the three-phase co-compensation circuits in sequence; the anti-thunder devices are all grounded; eachcapacitance compensation unit comprises three capacitors connected in series; and three-phase circuits are connected between every two capacitors of the capacitance compensation units in sequence. Thelow-voltage capacitance compensation cabinet has the advantages of simple structure, automatic protection, high safety, low cost and stable operation.

Description

technical field [0001] The invention belongs to the technical field of low-voltage power distribution, and in particular relates to a low-voltage capacitor compensation cabinet. Background technique [0002] The power system plays an important role in both production and life. Power supply failures seriously affect economic and social development and cause huge economic losses. Therefore, it is necessary to ensure the normal and stable operation of the power system. The places are too far apart, the storage cost of electric energy is high, the dynamic balance maintenance cost between the production and consumption of electric energy is high, and the continuous electric energy production cannot match the randomly changing electric energy consumption, so reactive power compensation must be carried out; Methods to improve the natural power factor include changing the wiring of light-load electrical appliances, appropriate motor capacity, reasonable line voltage transformation, ...

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Problems solved by technology

[0002] The power system plays an important role in both production and life. Power supply failures seriously affect economic and social development and cause huge economic losses. Therefore, it is necessary to ensure the normal and stable operation of the power system. The places are too far apart, the storage cost of electric energy is high, the dynamic balance maintenance cost between the production and consumption of electric energy is high, and the continuous electric energy production cannot match the randomly changing electric energy consumption, so reactive power compensation must be carried out; Methods to improve the natural power factor include changing the wiring of light-load electrical appliances, appropriate motor capacity, reasonable line voltage transformation, and control of no-load. The capacitor compensation method commonly used by enterprises to improve the power factor in production applications

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