Dynamic balanced three-phase device

Abstract

The invention relates to a dynamic balanced three-phase device which is applied to a power grid, comprising a balancing device and a current voltage detecting device connected in the power grid, wherein the balancing device comprises a processor, a signal generator, a controller, an inverting circuit and a filter circuit which are sequentially connected, the current voltage detecting device is connected to the processor, and the filter circuit is connected to the power grid. According to the technical solution provided by the embodiment of the invention, whether three phases in the power gridare out of balance is detected, the three phases of the power grid are adjusted in real time according to the real-time detection result, and the three-phase balance of the power grid is kept, so as to reduce energy consumption and guarantee line safety and safety operation of loads.

Description

Technical field [0001] The invention relates to the technical field of power supply, in particular to a dynamically balanced three-phase device. Background technique [0002] The three-phase imbalance of the low-voltage power grid has always been one of the main problems that plague power supply units. Most low-voltage power grids are used for three-phase four-wire system to supply power to users after the transformer is stepped down. It is a mixture of three-phase production power and single-phase load Electricity supply network. When installing single-phase users, the power supply department should balance the single-phase load on the three phases A, B, and C. However, in actual work and operation, the line signs, the negligence of the power-connecting personnel, and the uncontrollable increase in capacity due to single-phase users, the access of high-power single-phase loads, and the different timing of single-phase loads, etc. All have caused the unbalance of the three-phas...

AI Technical Summary

Problems solved by technology

However, in actual work and operation, due to the signs of the line, the negligence of the power-connecting personnel, and the uncontrollable capacity increase of single-phase users, the access of high-power single-phase loads, and the asynchronous nature of single-phase load power consumption, etc., All cause unbalanced three-phase load

If the low-voltage power grid operates under the condition of large three-phase load imbalance, it will have adverse effects on the low-voltage power grid and electrical equipment

[0003] The hazards of unbalanced three-phase load include: increasing the power loss of the line; increasing the power loss of the distribution transformer; reducing the output of the distribution transformer; generating zero-sequence current from the distribution transformer; affecting the safe operation of electrical equipment, etc.

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