Method and device for intelligently switching on and off transformer set

Abstract

The invention discloses a method and a device for intelligently switching on and off a transformer set, and belongs to the field of intelligent power equipment. The method is characterized by comprising the following steps of: (1) determining the number N of the transformers according to the multiple relationship of maximum load and minimum load, and connecting the N transformers with equal capacitance and equal impedance in parallel to form the transformer set; (2) acquiring real-time electrical parameters by using a data acquisition unit which is arranged on a primary side of the transformer set when the transformer set runs; (3) computing the rated electrical parameters of the used transformers in the transformer set, and computing, comparing and analyzing the real-time electrical parameters and the rated electrical parameters; and (4) inputting the result of the computing, comparison and analysis into a central processing unit, switching on and off the standby transformers in the transformer set by an actuating mechanism which is operated and controlled by the central processing unit according to the result, and cutting off the input standby transformer in advance when the load is reduced. The method and the device are suitable for a place where the load is changed largely, and have the advantages of saving no-load and load loss, reducing outage maintenance, and improving the reliability of power supply.

Description

technical field

[0001] The invention provides a method and device for intelligently switching transformer groups according to load conditions, belonging to the field of intelligent power equipment. Background technique

[0002] Power system loads, especially living quarters, hospitals, schools, office buildings, and discontinuously operating factories and mines, undergo repeated peak-valley-peak changes every day, and a large amount of electricity is wasted during holidays.

[0003] At present, the selection of transformer capacity is basically based on the method of referring to the peak capacity and the simultaneous rate. When the load is low, the operating capacity most of the time is only about a dozen or even a few tenths of the high load. For transformers with large and small capacities, the no-load loss varies greatly, and the load loss is nearly ten times the no-load loss. For decades, in order to save the no-load loss, the transformer has undergone several major mo...

Examples

Embodiment 1

[0038] Such as figure 1 As shown, the method for intelligently switching transformer groups includes the following steps:

[0039] (1) Set up N equal-capacity and equal-impedance transformers in parallel to form a transformer group, and the number N of transformers is determined according to the multiple relationship between the maximum load and the minimum load;

[0040] (2) Collect the real-time electrical parameters of the transformer group during operation through the data collector arranged on the primary side of the transformer group;

[0041] (3) Calculate the rated electrical parameters of the transformers that have been put into use in the transformer group, and calculate, compare and analyze the real-time electrical parameters and rated electrical parameters;

[0042] (4) Input the results of calculation, comparison and analysis into the central processing unit. According to the results, the central processing unit operates and controls the actuator to complete the ...

Embodiment 2

[0058] Multiple spare transformers are transformers with increasing capacities in equal differentials.

Embodiment 3

[0060] Three-phase star-connected structure of multiple spare transformers.

technical field

[0001] The invention provides a method and device for intelligently switching transformer groups according to load conditions, belonging to the field of intelligent power equipment. Background technique

[0002] Power system loads, especially living quarters, hospitals, schools, office buildings, and discontinuously operating factories and mines, undergo repeated peak-valley-peak changes every day, and a large amount of electricity is wasted during holidays.

[0003] At present, the selection of transformer capacity is basically based on the method of referring to the peak capacity and the simultaneous rate. When the load is low, the operating capacity most of the time is only about a dozen or even a few tenths of the high load. For transformers with large and small capacities, the no-load loss varies greatly, and the load loss is nearly ten times the no-load loss. For decades, in order to save the no-load loss, the transformer has undergone several major mo...

Examples

Embodiment 1

[0038] Such as figure 1 As shown, the method for intelligently switching transformer groups includes the following steps:

[0039] (1) Set up N equal-capacity and equal-impedance transformers in parallel to form a transformer group, and the number N of transformers is determined according to the multiple relationship between the maximum load and the minimum load;

[0040] (2) Collect the real-time electrical parameters of the transformer group during operation through the data collector arranged on the primary side of the transformer group;

[0041] (3) Calculate the rated electrical parameters of the transformers that have been put into use in the transformer group, and calculate, compare and analyze the real-time electrical parameters and rated electrical parameters;

[0042] (4) Input the results of calculation, comparison and analysis into the central processing unit. According to the results, the central processing unit operates and controls the actuator to complete the ...

Embodiment 2

[0058] Multiple spare transformers are transformers with increasing capacities in equal differentials.

Embodiment 3

[0060] Three-phase star-connected structure of multiple spare transformers.

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