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Automatic exchange device of load interface power supply phase, and control method thereof

A load interface and automatic switching technology, which is applied in the direction of reducing the asymmetry of the multi-phase network, eliminating/reducing the asymmetry of the multi-phase network, etc., can solve the problems of easy change of phase and difficult change of power supply phase of load interface, etc.

Inactive Publication Date: 2018-05-01
ZHEJIANG UNIV OF WATER RESOURCES & ELECTRIC POWER
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to solve the problem that the power supply phase of the load interface of the existing three-phase four-wire power supply is not easy to change, and provides a kind of power supply phase of the load interface of the three-phase four-wire power supply that can be easily changed, and can be carried out according to the unbalanced power factor on the three phases. The power supply phase of the load interface is automatically exchanged, with high safety and reliability, and can intelligently and automatically detect the switching fault of the compound switch itself. The highly intelligent automatic exchange device for the power supply phase of the load interface and its control method

Method used

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  • Automatic exchange device of load interface power supply phase, and control method thereof
  • Automatic exchange device of load interface power supply phase, and control method thereof
  • Automatic exchange device of load interface power supply phase, and control method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0085] Embodiment 1: Load interface power supply phase automatic switching device, see figure 1 and Figure 11 As shown, including A phase, B phase, C phase, neutral line N, A connection port, B connection port, C connection port, No. 1 load interface 811, No. 2 load interface 822, No. 3 load interface 833, and controller 107 , node J1, node J2, node J3, node J4, node J5, node J6, node J7 and node J8;

[0086] It also includes a three-phase power factor monitor 101 connected to the controller, a No. 1 phase voltage sampling circuit 102, a No. 1 single-phase inverter power supply 103, a No. 1 filter 104, a No. 1 isolation transformer 105, and a No. 1 load interface voltage Sampling circuit 108, interface power factor monitor 109, No. 2 phase voltage sampling circuit 110, No. 2 single-phase inverter power supply 1030, No. 2 filter 1040, No. 2 isolation transformer 1050, No. 2 load interface voltage sampling circuit 1080, switch K1, switch K2, switch K3, switch K4, switch K5, s...

example 2

[0148] Example 2, the difference with example 1 is:

[0149] see figure 1 , Figure 9 and Figure 10 As shown, the No. 1 load interface 811 is a quick connection port. The quick connection port includes a plug 34 and a housing 39. An insulating tube 31 is fixed upward on the upper surface of the housing. The pressure sensor 32 connected to the controller is fixed with a through hole communicating with the inner cavity 38 of the housing on the upper surface of the housing surrounded by the insulating tube, and a pin 37 is fixed in the through hole, and the lower end of the pin is located in the housing. In the inner cavity of the body, the upper end of the pin is located in the insulating tube; the two ends of a wire 30 are respectively conductively connected to the lower end of the pin and the node J6; the plug includes an insulating insert 36 and a conductive tube arranged in the insulating insert 35; the inner diameter of the insulating cannula matches the outer diameter of...

example 3

[0151] Example 3, the difference with Example 1 is:

[0152] see figure 1 and Figure 11 As shown, it also includes a memory 106, a wireless module 504, an address encoder 507 and a server 200 respectively connected to the controller.

[0153] If there are two load interface power supply phase automatic switching devices, then the two load interface power supply phase automatic switching devices can connect the two load interface power supply phase automatic switching devices to each other through their respective wireless modules for wireless signal connection;

[0154] When only one of the three load interfaces in the automatic switching device of the power supply phase of the first load interface is connected with a load, and only two of the three load interfaces in the automatic switching device of the power supply phase of the second load interface are connected to the load When the interface is connected with a load;

[0155] If the load interface of the first load in...

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Abstract

The invention discloses an automatic exchange device of load interface power supply phase, and a control method thereof. The invention relates to the technical field of phase and electricity selectionof three-phase and four-wire power supply outlet. The power supply phase of the load interface of the three-phase and four-wire power supply can be easily changed, and the automatic change of the load interface power supply phase can be conducted based on the imbalance of the three-phase upper power factors. The automatic exchange device of load interface power supply phase comprises A phase, B phase, C phase, a zero line N, three load interfaces, a controller, a plurality of nodes, three-phase power factor monitoring devices which are respectively connected to the controller, an interface power factor monitoring device, two phase voltage sampling circuits, two single-phase inversion power supplies, two filters, two isolation transformers, two load interface voltage sampling circuits, anda plurality of switches. Through the control of the controller, the change of input phase electricity among various load interfaces can be realized.

Description

technical field [0001] The invention relates to the technical field of phase selection of a three-phase four-wire power output port, in particular to a load interface power supply phase automatic switching device and a control method thereof. Background technique [0002] With the development of economy and society, there are more and more types of electrical devices. Since the current power supply system is generally a three-phase power supply system, in the three-phase power supply system, if the power factor on the three phases is relatively asymmetric, the unbalanced operation of the power grid will occur, and the power grid will jitter. [0003] When the power grid is running in an unbalanced state, the transformer in the power grid is in an asymmetric running state. A transformer in an asymmetric running state will cause the zero-sequence current of the transformer to be too large, and the excessive zero-sequence current will cause the local parts of the transformer to...

Claims

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Application Information

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IPC IPC(8): H02J3/26
CPCH02J3/26Y02E40/50
Inventor 谢楠张海波
Owner ZHEJIANG UNIV OF WATER RESOURCES & ELECTRIC POWER
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