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Reactive compensation method of transformer

A transformer, capacitive reactive power technology, applied in reactive power compensation, reactive power adjustment/elimination/compensation, AC network circuit, etc., can solve problems such as poor transformer compensation effect, improve power factor, overcome technical bias , the effect of reducing the power factor is too low

Inactive Publication Date: 2018-03-20
成都春源食品有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Aiming at the deficiencies in the prior art, the present invention provides a method for reactive power compensation of transformers, which solves the problem of poor compensation effect of transformers

Method used

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  • Reactive compensation method of transformer
  • Reactive compensation method of transformer
  • Reactive compensation method of transformer

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Experimental program
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Effect test

Embodiment 1

[0025] A method for reactive power compensation of a transformer according to the present invention comprises the following steps:

[0026] a. Collect basic transformer data, active power P2 and reactive power Q2 on the secondary side of the transformer;

[0027] b. Use the active power P2 and reactive power Q2 to calculate the secondary side power factor ￡2;

[0028] c. Calculate the theoretical power factor ￡1 of the secondary side of the transformer by using the basic data of the transformer;

[0029] d. When the power factor difference ￡3 is greater than or equal to 0.1, calculate the maximum capacitive reactive power Q required by the transformer C , where ￡3=￡2-￡1;

[0030] e. Use the maximum capacitive reactive power Q C Calculate the number of columns connected to the compensation capacitor array that needs to be connected, and then connect it to the secondary current loop on the primary side of the transformer.

[0031] When the power factor difference ￡3 is less ...

Embodiment 2

[0041] After the existing transformer test data, the power factor of the secondary side is ￡2=0.89, and the theoretical power factor of the secondary side of the transformer is calculated￡1=0.74, Q c =484.5KVA. Q c Rounding off to compensate 500KVA, use 20 25KVA capacitor banks to form a whole column. Therefore, it is necessary to connect the 20-way capacitor bank to the main line of the secondary circuit of the primary side of the transformer through a contact switch.

[0042] Such as figure 1 , figure 2 and image 3 Shown: vs. figure 1 and figure 2 ,

[0043] figure 1 For the data after selecting the low-voltage side for reactive power compensation, the same Q c The obtained power factor is 0.89; since the difference between ￡2 and ￡1 is greater than 0.1, the gap is very large, so use the same Q c The main line of the secondary circuit on the primary side of the transformer is compensated to obtain figure 2 According to the data, the actual power factor is incr...

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Abstract

The invention provides a reactive compensation method of a transformer. The method comprises the steps of a, acquiring the basic data of the transformer, the active power P2 and the reactive power Q2of the secondary side of the transformer; b, calculating the secondary side power factor f2 according to the active power P2 and the reactive power Q2; c, calculating the theoretical power factor f1 of the secondary side of the transformer according to the basic data of the transformer; d, when a power factor difference f3 is larger than or equal to 0.1, calculating a maximum capacitive reactive power QC required by the transformer, wherein f3 =f2-f1; e, calculating the number of connected columns in a to-be-accessed compensation capacitor array according to the maximum capacitive reactive power QC, and accessing the compensation capacitor array to the secondary current loop of the primary side of the transformer. According to the reactive compensation method, the reactive compensation canbe effectively carried out on a user terminal.

Description

technical field [0001] The invention relates to the technical field of power transformation equipment, in particular to a method for reactive power compensation of a transformer. Background technique [0002] The basic principle of reactive power compensation: The power output by the grid includes two parts: one is active power: it directly consumes electric energy, converts electric energy into mechanical energy, heat energy, chemical energy or sound energy, and uses these energy to do work. This part of power is called active power. The second is reactive power: it does not consume electric energy, but converts electric energy into another form of energy. This energy is a necessary condition for electrical equipment to do work, and this energy is carried out with electric energy in the grid. Periodic conversion, this part of power is called reactive power (such as the electric energy occupied by electromagnetic components to establish a magnetic field, and the electric ene...

Claims

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Application Information

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IPC IPC(8): H02J3/18
CPCH02J3/1878Y02E40/30
Inventor 杨伟王建国王兴张国伟李桃姚明莲
Owner 成都春源食品有限公司
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