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

A technology of interphase capacitance and three-phase power, applied in circuit devices, reactive power adjustment/elimination/compensation, electrical components, etc., can solve the problems of high cost and large loss, achieve low cost, small loss, and solve power quality problem effect

Inactive Publication Date: 2017-07-28
SHANDONG JINHUA ELECTRIC POWER
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  • Description
  • Claims
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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

Method used

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

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Embodiment Construction

[0045] Embodiments of the present invention are further described below in conjunction with accompanying drawings:

[0046] Such as figure 1 As shown, the hybrid three-phase power balance device based on the interphase capacitance of the present invention includes a system power supply 1 and a load 5, the system power supply 1 and the load 5 are connected through a system bus 3, and the system bus 3 near the system power supply 1 is passed through The output reactance 9 (LA, LB, LC, LN) is connected to the active power balance inverter unit 8, and the active power balance inverter unit 8 is connected to the PWM pulse signal port of the control system 11, and the output reactance 9 and the system bus 3 pass through There is an output current transformer 2, the output current transformer 2 is connected to the output current sampling port of the control system 11, the system bus 3 between the system power supply 1 and the active power balance inverter unit 8 is connected to the s...

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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...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02J3/26H02J3/18
CPCY02E40/30Y02E40/50H02J3/26H02J3/1842H02J3/1864
Inventor 王雷宋元锋荆延飞刘林泉荆常淇张玉涛巩帅奇
Owner SHANDONG JINHUA ELECTRIC POWER
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