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Detection method of box-type transformer and transformer

A box-type transformer and detection method technology, applied in transformer testing, transformer/inductance parts, instruments, etc., can solve problems such as high installation cost, inconvenient life, and difficult installation

Active Publication Date: 2020-10-30
NINGBO AUX HIGH TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

When some of them cannot be repaired, only a whole set of equipment can be replaced, resulting in a waste of resources
In addition, during the maintenance process of box-type transformers, the whole set of equipment is in a state of stopping work, and can only work normally after the equipment is repaired. During this process, residents are in a state of power outage for a long time, which brings inconvenience to their lives.
Existing box-type transformers are usually installed by hoisting, which is difficult and expensive to install

Method used

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  • Detection method of box-type transformer and transformer
  • Detection method of box-type transformer and transformer
  • Detection method of box-type transformer and transformer

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0093] Embodiment 1, the present invention discloses a detection method of a box-type transformer. The box-type transformer includes a high-voltage room, a transformer room and a low-voltage room. The detection method includes the following steps:

[0094] ST1: Start the detection program;

[0095] ST2: Determine whether the oil level in the transformer room satisfies the preset state, if yes, perform ST3 detection, if not, determine that the box-type transformer is faulty;

[0096] ST3: Detect the environmental parameters of the box-type transformer, and judge whether the trigger condition for starting the fault detection module is met;

[0097] ST4: Detect according to the fault detection module to determine whether the transformer is faulty;

[0098] ST5: Execute transformer fault protection operation.

[0099] The box-type transformer includes a base on which three boxes that can be combined and spliced ​​and fixed are arranged. The three boxes are separately arranged as...

Embodiment 2

[0102] like figure 2 As shown, in ST2, the following detection steps are included:

[0103] ST21: Start the pressure sensor installed in the transformer room to detect the air pressure Pa at the top of the transformer room and the oil pressure P at the bottom of the transformer room b , the microprocessor transmits the collected pressure signal to the monitoring center;

[0104] ST22: Estimate the initial average temperature T of the transformer oil 油1 ;

[0105] ST23: Calculate the initial height H of the transformer oil in the transformer room 1 ;

[0106] ST24: Start the oil temperature detection counter, the count is n, define the time for each estimated oil temperature change as t, define T 1 =T 油1 ;

[0107] ST25: add 1 to the counter n;

[0108] ST26: Determine whether the counter reading n>A, where A is greater than 15; if yes, enter ST210; if not, enter ST27;

[0109] ST27: Calculate the expansion volume V of transformer oil 膨胀 , according to the expansion ...

Embodiment 3

[0121] like image 3 As shown, in ST2, the following detection steps are included:

[0122] ST21: Start the pressure sensor installed in the transformer room to detect the air pressure P at the top of the transformer room a and the oil pressure P at the bottom of the transformer chamber b , the microprocessor transmits the collected pressure signal to the monitoring center;

[0123] ST22: Estimate the initial average temperature T of the transformer oil 油1 ;

[0124] ST23: Calculate the initial height H of the transformer oil in the transformer room 1 ;

[0125] ST24: Start the oil temperature detection counter, the count is n, define the time for each estimated oil temperature change as t, define T 1 =T 油1 ;

[0126] ST25: add 1 to the counter n;

[0127] ST26: Determine whether the counter reading n>A, where A is greater than 15; if yes, enter ST210; if not, enter ST27;

[0128] ST27: Calculate the expansion volume V of transformer oil 膨胀 , according to the expans...

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Abstract

The invention provides a detection method of a box-type transformer and the transformer. The detection method comprises the following steps of: ST1, starting a detection program; ST2, judging whetheran oil level state of a transformer chamber meets a preset state or not, if so, performing ST3 detection, and if not, judging that the box-type transformer fails; ST3, detecting environmental parameters of the box-type transformer, and judging whether a triggering condition for starting the fault detection module is met or not; ST4, carrying out detection according to the fault detection module, and judging whether the transformer has a fault or not; and ST5, executing transformer fault protection operation. According to the detection method of the box-type transformer, by setting a multi-level detection program, on one hand, the reliability of operation detection of the box-type transformer is ensured, and secondary damage to normal operation of the transformer due to the fact that a wrong operation instruction is given by misjudgment is avoided; and meanwhile, resource waste caused by continuous operation of a fault detection program is avoided.

Description

technical field [0001] The invention relates to the technical field of power equipment, in particular to a detection method for a box-type transformer and the transformer. Background technique [0002] With the increasing scale and complexity of the power grid, the substantial increase in transmission capacity and the increase in voltage levels, the efficiency of power transmission is getting higher and higher, the investment in power grid equipment is getting higher and higher, and the direct and indirect losses caused by sudden failures are also increasing. The bigger it is, how to avoid and reduce losses becomes a very prominent issue. For this reason, the maintenance of power grid equipment has gradually developed from accident maintenance to regular maintenance, and then to condition-based maintenance based on reliability. [0003] The box transformer is a kind of high-voltage switchgear, distribution transformer and low-voltage power distribution device. According to ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01R31/00G01R31/62H01F27/40
CPCG01R31/00H01F27/402H01F27/40
Inventor 邵柳东虞永昌鲍玉涛李有明
Owner NINGBO AUX HIGH TECH
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