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Device and method for synchronously connecting three-phase alternating current to single-phase alternating current in parallel

A single-phase alternating current and three-phase alternating current technology, which is applied in the direction of AC network with the same frequency from different sources, can solve the problems of high cost of the inverter and can not meet the user's load demand, and achieves the goal of reducing air consumption and material cost. Effect

Inactive Publication Date: 2016-02-10
罗德能源优化科技(青岛)有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The disadvantage of the existing technology is: when the user's actual load demand for a certain phase exceeds the single-phase power supply power of ordinary inverter equipment, the use of ordinary inverter equipment cannot meet the user's load demand
After the battery is fully charged, the power generation equipment is disconnected, and the battery inverts the DC power into three-phase AC power through three inverters to supply power to the user, because the maximum output power of each inverter is equal to the sum of the three-phase AC power, so It can output up to 300% through any phase. Although the ordinary inverter of this scheme can meet the user's overload requirements, the cost of the inverter is too high

Method used

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  • Device and method for synchronously connecting three-phase alternating current to single-phase alternating current in parallel
  • Device and method for synchronously connecting three-phase alternating current to single-phase alternating current in parallel
  • Device and method for synchronously connecting three-phase alternating current to single-phase alternating current in parallel

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Embodiment 1

[0028] refer to Figure 1 to Figure 2 ,Such as Figure 1 to Figure 2 A device for synchronously paralleling three-phase alternating current to single-phase alternating current is shown, including a first CPU unit, a charging unit and an inverter unit; the first CPU unit is connected to the charging unit; the charging unit is connected to the power grid or Generator; the inverter unit is connected to the output end of the charging unit; the inverter unit includes a second CPU unit, a first switch K1, a second switch K2, a third switch K3, a fourth switch K4, and a fifth switch K5, sixth switch K6, seventh switch K7, eighth switch K8, ninth switch K9, tenth switch K10, eleventh switch K11, first inverter G1, second inverter G2, third inverter Transformer G3, the first toroidal transformer T1, the second toroidal transformer T2 and the third toroidal transformer T3; the first switch K1 is connected to the second switch K2, and connected between the positive pole and the negative...

Embodiment 2

[0034] image 3 A flowchart of a method for synchronously paralleling three-phase alternating current to single-phase alternating current according to the present invention is shown.

[0035] refer to image 3 ,Such as image 3A method for synchronously paralleling three-phase alternating current to single-phase alternating current includes the following steps:

[0036] S1, the three-phase alternating current generated by the power generation equipment is converted into direct current through the rectification process to charge the battery, and after the battery is fully charged, the power generation equipment is disconnected;

[0037] S2, when the user chooses to supply power from one channel, the second CPU unit starts the single-phase AC program, and the storage battery outputs the single-phase AC power through the three inverters at the same time, and there is no phase shift between them, forming R, R' and R" three-way single-phase alternating current;

[0038] S3, the...

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Abstract

The invention discloses a device and method for synchronously connecting a three-phase alternating current to a single-phase alternating current in parallel. The device for synchronously connecting the three-phase alternating current to the single-phase alternating current in parallel comprises a first CPU unit, a charging unit and an inverter unit. The first CPU unit is connected with the charging unit; the charging unit is connected with a power grid or a power generator; and the inverter unit is connected with the output end of the charging unit. The inverter unit comprises a second CPU unit, a first switch, a second switch, a third switch, a fourth switch, a fifth switch, a sixth switch, a seventh switch, an eighth switch, a ninth switch, a tenth switch, an eleventh switch, a first inverter, a second inverter, a third inverter, a first ring transformer, a second ring transformer and a third ring transformer. Through the technology of combining the three paths to one path, the single-channel power supply power is allowed to reach up to 300% of the rated phase power.

Description

technical field [0001] The invention belongs to the field of power supply, and in particular relates to a device and a method for synchronously paralleling three-phase alternating current to single-phase alternating current. Background technique [0002] At present, the load of the three-phase alternating current distributed from the power grid to the user's home or the general power generation equipment is balanced, but the actual load demand of each phase of the user is unbalanced. [0003] In the prior art, the three-phase alternating current generated by the power generation equipment is rectified to form direct current to charge the storage battery. After the battery is fully charged, the power generation equipment is disconnected, and the battery inverts the DC power into three-phase AC power through the inverter to supply power to the user. The power supplied by each phase is the input power of each phase of the inverter. [0004] The disadvantage of the prior art is...

Claims

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Application Information

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IPC IPC(8): H02J3/08
Inventor 鲍华德托马斯王刚窦永军
Owner 罗德能源优化科技(青岛)有限公司
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