Hybrid three-phase power balancing device and method based on inter-phase capacitors

Abstract

The invention relates to a hybrid three-phase power balancing device and method based on inter-phase capacitors. A system bus close to a system power side is connected with an active power balance inverter unit through the output reactance, the active power balance inverter unit is connected to a PWM pulse signal port, an output current transformer is arranged between the output reactance and the system bus, the output current transformer is connected to an output current sampling port, a system bus between a system power supply and the active power balance inverter unit is connected to a system voltage transformer, and the system voltage transformer is connected to a system voltage sampling port. A system bus close to the load side is connected to a passive balance unit, the passive balance unit is connected to a passive control signal port, a system bus between a load and the passive balance unit is provided with a load current transformer, and the load current transformer is connected to a load current sampling port. The compensation precision is good, the loss is small, the service life of the equipment is prolonged, and the stability and the reliability of equipment operation are improved.

Description

technical field [0001] The present invention relates to a three-phase power balance device and method, in particular to a hybrid three-phase power balance device and method based on interphase capacitance, especially to a passive balance unit and active power transfer based on interphase capacitance Hybrid coordination control device and method for power balance unit. Background technique [0002] With the rapid development of society today, people's living standards have been further improved, and one of the major features is the increase in electricity consumption. However, with the diversification of domestic electricity consumption and the increase of intelligent and non-linear electrical appliances, the power quality problems in the distribution network are becoming more and more serious. Among them, the power factor is low, the harmonic content is large, and the three-phase load is unbalanced. most prominent issue. At present, for the power quality problem of distrib...

AI Technical Summary

Problems solved by technology

Compared with the capacitive reactive power compensation device, the active three-phase power balance device has the advantages of active power transfer, dynamic reactive power compensation, and non-resonance with the system, but in practical applications, the loss of the active three-phase power balance device big, expensive

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