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Multifunctional automatic phase change system and phase change method for medium and low voltage lines

A low-voltage line and multi-functional technology, which is applied in the field of multi-functional automatic phase commutation system of medium and low voltage lines and its phase commutation, can solve problems such as unbalanced three-phase loads, achieve energy-saving electricity prices, prevent personal electric shock casualties, and improve phase commutation Effects on Success Rate and Accuracy

Active Publication Date: 2020-04-07
ANHUI ZENITH ELECTRICITY & ELECTRONICS
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] Aiming at the deficiencies of the prior art, the present invention provides a multifunctional automatic phase change system and its phase change method for medium and low voltage lines, which has the advantages of energy saving and high real-time performance, and solves the problem of unbalanced three-phase load in the distribution station area

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  • Multifunctional automatic phase change system and phase change method for medium and low voltage lines
  • Multifunctional automatic phase change system and phase change method for medium and low voltage lines
  • Multifunctional automatic phase change system and phase change method for medium and low voltage lines

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Embodiment 1

[0055] see figure 1 , the multifunctional automatic phase change system for medium and low voltage lines in this embodiment is applied in a power distribution station area. The phase change system includes a main control module set at the transformer end of the station area and a plurality of execution modules set at the user end, wherein each The execution module corresponds to multiple users connected in parallel.

[0056] see figure 2 , the main control module includes a main controller, a three-phase current sampling unit, a key display unit 1, and a signal transmitting unit. The three-phase current sampling unit is used to detect the three-phase current I output by the transformer in real time A , I B , I C . The signal transmitting unit is used to remotely transmit the current information detected by the three-phase current sampling unit to the main station of the power grid, and can also transmit other information to the main station. The signal transmitting unit...

Embodiment 2

[0068] see Figure 5 as well as Image 6 On the basis of Embodiment 1, the multifunctional automatic phase commutation system for medium and low voltage lines in this embodiment adds a voltage sampling unit and an aging alarm device installed in the execution module. The voltage sampling unit detects the voltage at both ends of the electronic commutation switch when the electronic commutation switch is closed, and the executive controller judges whether the voltage difference between the two ends of the electronic commutation switch exceeds a preset voltage difference, and if so, the executive controller drives the aging alarm device to alarm.

[0069] In other embodiments, after the electronic commutation switch is closed, its voltage fluctuates within a preset time two, and reaches a steady state after a preset time two. The voltage sampling unit can also detect the peak voltage within the preset time two after the electronic commutation switch is closed, and the steady vol...

Embodiment 3

[0072] see Figure 7 as well as Figure 8 , The multifunctional automatic phase commutation system for medium and low voltage lines in this embodiment adds a current sampling unit and an aging alarm device installed in the execution module on the basis of Embodiment 1. After the electronic commutation switch is closed, its current fluctuates within a preset time two, and reaches a steady state after the preset time two; the current sampling unit detects the peak current within the preset time two after the electronic commutation switch is closed, and The steady current is reached after the preset time two; the execution controller judges whether the voltage difference between the peak current and the steady current exceeds a preset current difference, and if so, the execution controller drives the aging alarm device to alarm.

[0073] The multifunctional automatic phase change system for medium and low voltage lines in this embodiment is suitable for aging alarm monitoring wh...

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Abstract

The invention discloses a multifunctional automatic phase change system and a phase change method for medium and low voltage lines. The phase commutation system includes a main control module and a plurality of execution modules, and each execution module corresponds to multiple users connected in parallel. The main control module includes a main controller and a three-phase current sampling unit, and each execution module includes an electronic phase change switch, and the electronic phase change switch selects the three phases of power supply of the transformer according to the switching command A phase corresponding to the command supplies power to multiple users corresponding to the execution module. The present invention divides the lines of the distribution station area by setting a main control module and an execution module, and controls a plurality of execution modules to switch the three phases of each line through the main control module set at the distribution transformer end, so that all lines after switching The three-phase power load tends to be balanced, thereby improving the unbalance of the three phases, reducing the line loss in the distribution area, ensuring the power quality of users, and realizing the purpose of saving energy and reducing electricity prices.

Description

technical field [0001] The invention relates to an automatic phase change system and a phase change method thereof in the technical field of smart grids, in particular to a multifunctional automatic phase change system and a phase change method for medium and low voltage lines. Background technique [0002] Three-phase load balance is the basis of safe power supply, and unbalanced three-phase load will reduce the power supply efficiency of lines and distribution transformers if it is light, or it will cause a certain phase wire to burn out and a switch to burn out due to heavy load phase overload , and even serious consequences such as single-phase burnout of distribution transformers. Therefore, only the three-phase impedance balance can ensure the good operation of the low-voltage leakage protection and prevent personal electric shock casualties, and only the three-phase load balance can ensure the user's power quality. The balance of the three-phase load is also the basi...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H02J3/26
CPCG01R31/086H02J3/26Y02E40/50
Inventor 明小慧杨黄河王太平张小龙赵伟
Owner ANHUI ZENITH ELECTRICITY & ELECTRONICS
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