Test system and test method for simulating transformer fire combustion under electric field condition

A technology for simulating transformers and testing systems, applied in the direction of using combustion for chemical analysis, etc., can solve problems such as unpredictable control measures, and achieve the effects of reducing fire occurrence, simple operation, and personal protection

Inactive Publication Date: 2020-11-06
STATE GRID HUNAN ELECTRIC POWER +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The invention provides a test system and test method for simulating transformer fire combustion under electric field conditions to solve the current technical problem that effective pre-control measures cannot be taken before transformer fire occurs

Method used

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  • Test system and test method for simulating transformer fire combustion under electric field condition
  • Test system and test method for simulating transformer fire combustion under electric field condition
  • Test system and test method for simulating transformer fire combustion under electric field condition

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Experimental program
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Effect test

Embodiment 1

[0035] see figure 1 , The test system for simulating transformer fire combustion under electric field conditions in this embodiment includes: tester 1, proportional mixer 3, gas tank group, ignition energy generator 5 and transformer oil constant temperature heating device 2. The inner cavity of the tester 1 is connected to the transformer oil constant temperature heating device 2 through the oil inlet pipeline 21 and the oil outlet pipeline 22 to connect to the circulating oil circuit; Connected, the output end of the proportional mixer 3 communicates with the inner cavity of the tester 1 so that the combustible gases from multiple gas tanks are mixed in proportion and then input into the tester 1; the ignition end of the ignition energy generator 5 is connected to the tester 1 Cavity, providing ignition arc for tester 1.

[0036] The above-mentioned structure can simulate the working state and initial oil temperature of the transformer oil in the inner cavity of the tester ...

Embodiment 2

[0039] This embodiment is a test method for simulating transformer fire combustion under electric field conditions using the test system of Embodiment 1. This embodiment is used to carry out transformer oil fire ignition mechanism tests at different temperatures, including the following steps:

[0040] S1: adjust the heating oil temperature of the transformer oil constant temperature heating device 2 through the control module 6 to adjust the initial oil temperature;

[0041] S2: adjusting the temperature in the cavity of the tester 1 to simulate different ambient temperatures;

[0042] S3: Adjust the ignition power and ignition duration of the ignition energy generator 5 to adjust the ignition energy. After the oil temperature and ambient temperature reach the set value and stabilize, start the energy generator to ignite; repeat the steps of adjusting the ignition energy and ignition until the test The critical ignition energy of transformer oil at a specified initial oil tem...

Embodiment 3

[0046] The method adopted in this embodiment is basically the same as that in Embodiment 2. This embodiment simulates a 220kV transformer oil fire ignition test. The transformer oil operates at 85°C and the internal air temperature is 90°C. Tester 1 has a constant temperature range of 0-200°C and a pressure range of 0-200kPa. The ignition mode of the ignition energy generator 5 is pulse ignition, the spark energy range is 0.1-2000mJ, and the ignition voltage is 15kV.

[0047] see figure 2 , the test process is as follows:

[0048] S1: Build a test platform according to the instructions, and prepare test consumables such as transformer oil.

[0049] S2: Initialize the instrument and equipment, set the heating temperature of the transformer oil constant temperature heating device 2 to 85°C, and set the internal air temperature of the tester 1 to 90°C.

[0050] S3: Set the ignition energy of the electric spark to 5mJ, and the ignition time to 10ms.

[0051] S4: When the oil...

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Abstract

The invention discloses a test system and a test method for simulating transformer fire combustion under an electric field condition. The system comprises a tester, a proportional mixer, a gas tank group, an ignition energy generator and a transformer oil constant-temperature heating device, an inner cavity of the tester is connected with the transformer oil constant-temperature heating device through an oil inlet pipeline and an oil outlet pipeline so as to be connected into a circulating oil way. The input end of the proportional mixer is connected with a plurality of gas tanks in the gas tank group, and the output end of the proportional mixer is communicated with the inner cavity of the tester so as to proportionally mix combustible gas from the plurality of gas tanks and input the combustible gas into the tester; and the ignition end of the ignition energy generator is connected with the inner cavity of the tester to provide an ignition arc for the tester. The test method comprises the step of respectively carrying out ignition tests under different temperatures, different gas component conditions and the condition of coexistence of transformer oil and combustible gas by adopting the test system. According to the invention, the ignition mechanism of combustible gas caused by different transformer faults can be tested.

Description

technical field [0001] The invention relates to the technical field of disaster prevention and reduction in electric power systems, in particular to a test system and test method for simulating transformer fire combustion under electric field conditions. Background technique [0002] Transformer is the core electrical equipment widely used in power system. The voltage of the transformer is high, and there is a large amount of combustible fuel inside, which is prone to fire, burning the transformer, and causing large-scale and long-term power outages. With the increase of transformer voltage level and capacity, the operating environment is becoming more and more complex. In recent years, frequent transformer fires have seriously threatened the safe operation of the power grid. In 2014, a transformer caught fire in the British Channel, and Eurostar international trains were once suspended; in 2019, a 1000kV Quancheng substation transformer in Shandong exploded, resulting in ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N31/12
CPCG01N31/12
Inventor 刘毓熊蔚立吴传平陈宝辉周天念梁平孙易成
Owner STATE GRID HUNAN ELECTRIC POWER
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