Three-phase device

Abstract

The invention relates to a three-phase device. The dynamic balancing three-phase device is applied to a power network. The dynamic balancing three-phase device comprises a balancing device and a current-voltage detecting device connected in the power network. The balancing device comprises a processor, a signal generator, a controller, an inverter circuit and a filter circuit connected in turn; The current-voltage detecting device is connected with the processor, and the filter circuit is connected with the electric network. The technical proposal provided by the embodiment of the invention realizes the detection of three-phase imbalance in the electric network, and real-time adjustment of the three-phase of the electric network according to the real-time detection result, so as to maintain the three-phase balance of the electric network, reduce energy consumption, and ensure the safety of the line and the safe operation of the load.

Description

technical field [0001] The invention relates to the technical field of power supply, in particular to a three-phase device. Background technique [0002] The three-phase unbalance of the low-voltage power grid has always been one of the main problems plaguing the power supply unit. Most of the low-voltage power grid is stepped down by a transformer and then supplies power to users in a three-phase four-wire system. It is a mixed use of three-phase production power and single-phase load. electricity supply network. When installing single-phase users, the power supply department should tap the single-phase load on the three phases A, B, and C in a balanced manner. 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 unba...

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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