CN109211760A - A kind of experimental method of transformer insulated dry optimizing research - Google Patents
A kind of experimental method of transformer insulated dry optimizing research Download PDFInfo
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Abstract
The invention discloses a kind of experimental methods of transformer insulated dry optimizing research, experimental system is built first, then furfural content in transformer insulation oil, the insulation characteristic parameters such as oil temperature and water content in oil content are obtained by experimental system, the moisture concentration and average degree of polymerization in transformer insulating paper are calculated according to the equilibrium relation of Oil-Paper Insulation in transformer, transformer insulated drying time at a certain temperature is calculated by transformer dry model, which effectively increases transformer insulated drying efficiency and effect.
Description
Technical field
The invention belongs to transformer dry technology fields, and in particular to a kind of experiment of transformer insulated dry optimizing research
Method.
Background technique
Transformer is the core equipment in electric system, the effect of starting voltage transformation and energy transmission, insulation performance and
Operating status is directly related to the reliability and stability of whole system.The insulation performance of transformer is to guarantee its reliability service
Essential condition, but transformer working environment is more severe, and the moisture that outside moisture intrusion is generated with insulating paper aging will lead to change
Depressor dampness, causes the insulation performance of transformer to reduce, and brings hidden danger for the safe operation of electric system, to improve transformer
Insulation performance extends the Years Of Service of transformer, need to be to the higher transformer dry of moisture content.
Current drying means does not consider the difference of transformer degree of aging and damp degree, the drying to different transformers
Time and temperature are invariable, cause the waste of resource and the energy, are unable to reach optimal drying effect or even gas phase is dry
Vapor (steam) temperature is excessively high in the process leads to C-C in oil, c h bond fracture, accelerates transformer insulated aging, influences the insulation of transformer
Performance optimizes transformer insulated drying process particularly important.The key of technology optimization of drying is to different aging journeys
Degree and damp degree choose drying time appropriate and temperature, that is, determine transformer insulated drying time function, and are directed to drying
The research of the function of time needs specific experimental method, therefore is badly in need of a kind of experiment side of transformer insulated dry optimizing research
Method.
Summary of the invention
It is optimized in order to the drying process to transformer, the present invention provides a kind of transformer insulated dry optimizations
The experimental method of research comprising the steps of:
Step 1: building experiment porch
Build the experiment porch of transformer insulated dry optimizing research, including transformer high-voltage winding (4), transformer low voltage
Winding (3), heating wire (5), insulation fuel tank (14), temperature control system (7), terminating machine (8), oil pump (10), high-performance are dry
Agent (13), transformer high-voltage winding (4) and transformer low voltage winding (3) are fixed on iron core (2), and insulating oil (1) liquid level is higher than
Transformer high-voltage winding (4) and transformer low voltage winding (3), in interior bottom surrounding winding heating wire (5) of insulation fuel tank (14), absolutely
Edge fuel tank (14) is fixed on first support (16a), second support (16b), third bracket (16c) and the 4th bracket (16d), temperature
Degree sensor (15), which is placed in insulation fuel tank (14), monitors insulating oil (1) temperature in real time, and temperature data is sent to temperature control
Temperature data uploading to terminating machine (8), terminating machine (8) are sent a command to temperature control by system (7) processed, temperature control system (7)
System (7) processed cut-offs to guarantee that insulation fuel tank (14) is in by the power supply of temperature control system (7) control heating wire (5)
Moisture content data in insulating oil (1) are uploaded to terminating machine (8) by temperature constant state, moisture transducer (6), petroleum pipeline (9) one
It terminates into insulation fuel tank (14) bottom, petroleum pipeline (9) is another to be connected to the second petroleum pipeline valve switch (11b), and oil pump (10) will
Insulating oil (1) in insulation fuel tank (14) is extracted out through the second petroleum pipeline valve switch (11b), and insulating oil (1) passes through the second strainer
(12b) enters in high-performance desiccant (13), and high-performance desiccant (13) is to remove the moisture in insulating oil (1), after dry
Insulating oil (1) after the first strainer (12a), the first petroleum pipeline valve switch (11a) enter insulating oil case (14) in, first
Strainer (12a), the second strainer (12b) insulate in fuel tank (14) to prevent high-performance desiccant (13) from entering with insulating oil (1),
To realize the function of analogue transformer insulation torrefaction；
Step 2: before transformer insulated drying, insulating oil (1) is sampled using transformer insulated drying experiment platform,
Furfural content furfural, calculating transformer insulating paper average degree of polymerization DP in measurement oil are exhausted by furfural content calculating transformer
The expression formula of edge paper average degree of polymerization DP are as follows:
Step 3: obtaining moisture in insulating oil (1) by the moisture transducer (6) in transformer insulated drying experiment system
Content calculates insulating paper original water content C by paper oil insulation stable state micro hydropower cloth curve0；
Step 4: the control parameter D of calculating transformer insulation torrefaction1And D2:
D1=a1exp(DP/a2)+a3 (2)
In formula, control parameter D1, unit m2/ s, control parameter D2, unit m2/ s, a1、a2、a3、b1、b2It is constant,
a1Value be 2.3 × 10-6, a2Value be 758.22, a3Value be 26.23 × 10-6, b1Value be 4700.63, b2Value be
0.05；
Step 5: the impact factor D of calculating transformer insulation torrefaction:
In formula, k is the constant that value is equal to 0.2, and T is transformer insulated drying temperature, unit K；
Step 6: determining transformer insulated drying time function τ:
In formula, the value range of L is 0.09~0.15, T0For benchmark temperature, unit K.
The present invention has the advantages that
The present invention provides a kind of experimental method of transformer insulated dry optimizing research, according to the present invention disclosed experiments
Method builds experimental system first, then by experimental system obtain transformer insulation oil in furfural content, insulation oil temperature and
The characteristic parameters such as water content in oil content calculate in transformer insulating paper according to the equilibrium relation of Oil-Paper Insulation in transformer
Moisture concentration and average degree of polymerization, transformer insulated drying at a certain temperature is calculated by transformer dry model
Time, the experimental method effectively increase transformer insulated drying efficiency and effect.
Detailed description of the invention
A kind of experiment porch schematic diagram of transformer insulated dry optimizing research of Fig. 1.
Specific embodiment
The present invention will be further explained below with reference to the attached drawings:
Fig. 1 show a kind of experiment porch schematic diagram of transformer insulated dry optimizing research.As can be seen from Figure 1 one
The experimental method of kind transformer insulated dry optimizing research want the following steps are included:
Step 1: building experiment porch
Build the experiment porch of transformer insulated dry optimizing research, including transformer high-voltage winding (4), transformer low voltage
Winding (3), heating wire (5), insulation fuel tank (14), temperature control system (7), terminating machine (8), oil pump (10), high-performance are dry
Agent (13), transformer high-voltage winding (4) and transformer low voltage winding (3) are fixed on iron core (2), and insulating oil (1) liquid level is higher than
Transformer high-voltage winding (4) and transformer low voltage winding (3), in interior bottom surrounding winding heating wire (5) of insulation fuel tank (14), absolutely
Edge fuel tank (14) is fixed on first support (16a), second support (16b), third bracket (16c) and the 4th bracket (16d), temperature
Degree sensor (15), which is placed in insulation fuel tank (14), monitors insulating oil (1) temperature in real time, and temperature data is sent to temperature control
Temperature data uploading to terminating machine (8), terminating machine (8) are sent a command to temperature control by system (7) processed, temperature control system (7)
System (7) processed cut-offs to guarantee that insulation fuel tank (14) is in by the power supply of temperature control system (7) control heating wire (5)
Moisture content data in insulating oil (1) are uploaded to terminating machine (8) by temperature constant state, moisture transducer (6), petroleum pipeline (9) one
It terminates into insulation fuel tank (14) bottom, petroleum pipeline (9) is another to be connected to the second petroleum pipeline valve switch (11b), and oil pump (10) will
Insulating oil (1) in insulation fuel tank (14) is extracted out through the second petroleum pipeline valve switch (11b), and insulating oil (1) passes through the second strainer
(12b) enters in high-performance desiccant (13), and high-performance desiccant (13) is to remove the moisture in insulating oil (1), after dry
Insulating oil (1) after the first strainer (12a), the first petroleum pipeline valve switch (11a) enter insulating oil case (14) in, first
Strainer (12a), the second strainer (12b) insulate in fuel tank (14) to prevent high-performance desiccant (13) from entering with insulating oil (1),
To realize the function of analogue transformer insulation torrefaction；
Step 2: before transformer insulated drying, insulating oil (1) is sampled using transformer insulated drying experiment platform,
Furfural content furfural, calculating transformer insulating paper average degree of polymerization DP in measurement oil are exhausted by furfural content calculating transformer
The expression formula of edge paper average degree of polymerization DP are as follows:
Step 3: obtaining moisture in insulating oil (1) by the moisture transducer (6) in transformer insulated drying experiment system
Content calculates insulating paper original water content C by paper oil insulation stable state micro hydropower cloth curve0；
Step 4: the control parameter D of calculating transformer insulation torrefaction1And D2:
D1=a1exp(DP/a2)+a3 (2)
In formula, control parameter D1, unit m2/ s, control parameter D2, unit m2/ s, a1、a2、a3、b1、b2It is constant,
a1Value be 2.3 × 10-6, a2Value be 758.22, a3Value be 26.23 × 10-6, b1Value be 4700.63, b2Value be
0.05；
Step 5: the impact factor D of calculating transformer insulation torrefaction:
In formula, k is the constant that value is equal to 0.2, and T is transformer insulated drying temperature, unit K；
Step 6: determining transformer insulated drying time function τ:
In formula, the value range of L is 0.09~0.15, T0For benchmark temperature, unit K.
Claims (1)
1. a kind of experimental method of transformer insulated dry optimizing research, which comprises the steps of:
Step 1: building experiment porch
Build the experiment porch of transformer insulated dry optimizing research, including transformer high-voltage winding (4), transformer low voltage winding
(3), heating wire (5), insulation fuel tank (14), temperature control system (7), terminating machine (8), oil pump (10), high-performance desiccant
(13), transformer high-voltage winding (4) and transformer low voltage winding (3) are fixed on iron core (2), and insulating oil (1) liquid level, which is higher than, to be become
Depressor high-voltage winding (4) and transformer low voltage winding (3), in interior bottom surrounding winding heating wire (5) of insulation fuel tank (14), insulation
Fuel tank (14) is fixed on first support (16a), second support (16b), third bracket (16c) and the 4th bracket (16d), temperature
Sensor (15), which is placed in insulation fuel tank (14), monitors insulating oil (1) temperature in real time, and temperature data is sent to temperature control
Temperature data uploading to terminating machine (8), terminating machine (8) are sent a command to temperature control by system (7), temperature control system (7)
System (7) cut-offs to guarantee to insulate fuel tank (14) in perseverance by the power supply of temperature control system (7) control heating wire (5)
Moisture content data in insulating oil (1) are uploaded to terminating machine (8) by temperature state, moisture transducer (6), petroleum pipeline (9) one end
Access insulation fuel tank (14) bottom, petroleum pipeline (9) is another to be connected to the second petroleum pipeline valve switch (11b), and oil pump (10) will be exhausted
Insulating oil (1) in edge fuel tank (14) is extracted out through the second petroleum pipeline valve switch (11b), and insulating oil (1) passes through the second strainer
(12b) enters in high-performance desiccant (13), and high-performance desiccant (13) is to remove the moisture in insulating oil (1), after dry
Insulating oil (1) after the first strainer (12a), the first petroleum pipeline valve switch (11a) enter insulating oil case (14) in, first
Strainer (12a), the second strainer (12b) insulate in fuel tank (14) to prevent high-performance desiccant (13) from entering with insulating oil (1),
To realize the function of analogue transformer insulation torrefaction；
Step 2: before transformer insulated drying, being sampled to insulating oil (1), measurement using transformer insulated drying experiment platform
Furfural content furfural in oil, calculating transformer insulating paper average degree of polymerization DP, by furfural content calculating transformer insulating paper
The expression formula of average degree of polymerization DP are as follows:
Contain step 3: obtaining moisture in insulating oil (1) by the moisture transducer (6) in transformer insulated drying experiment system
Amount calculates insulating paper original water content C by paper oil insulation stable state micro hydropower cloth curve0；
Step 4: the control parameter D of calculating transformer insulation torrefaction1And D2:
D1=a1exp(DP/a2)+a3 (2)
In formula, control parameter D1, unit m2/ s, control parameter D2, unit m2/ s, a1、a2、a3、b1、b2It is constant, a1's
Value is 2.3 × 10-6, a2Value be 758.22, a3Value be 26.23 × 10-6, b1Value be 4700.63, b2Value be 0.05；
Step 5: the impact factor D of calculating transformer insulation torrefaction:
In formula, k is the constant that value is equal to 0.2, and T is transformer insulated drying temperature, unit K；
Step 6: determining transformer insulated drying time function τ:
In formula, the value range of L is 0.09~0.15, T0For benchmark temperature, unit K.
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| CN201810970514.8A CN109211760B (en) | 2018-08-24 | 2018-08-24 | Experimental method for optimization research of insulation drying of transformer |
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| CN201810970514.8A CN109211760B (en) | 2018-08-24 | 2018-08-24 | Experimental method for optimization research of insulation drying of transformer |
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Cited By (4)
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| CN110554287A (en) * | 2019-09-20 | 2019-12-10 | 福州大学 | Oil paper insulation micro-water content evaluation method by utilizing backward selection multiple regression analysis |
| CN112698245A (en) * | 2020-12-02 | 2021-04-23 | 西南交通大学 | Transformer insulation reliability analysis method with less failure data |
| CN114088922A (en) * | 2021-11-08 | 2022-02-25 | 广东电网有限责任公司广州供电局 | Detection system for transformer insulation aging |
| CN117169638A (en) * | 2023-11-02 | 2023-12-05 | 湖南华夏特变股份有限公司 | Transformer insulation paper aging degree detection method, system, equipment and storage medium |
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
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| CN112698245A (en) * | 2020-12-02 | 2021-04-23 | 西南交通大学 | Transformer insulation reliability analysis method with less failure data |
| CN112698245B (en) * | 2020-12-02 | 2021-09-28 | 西南交通大学 | Transformer insulation reliability analysis method with less failure data |
| CN114088922A (en) * | 2021-11-08 | 2022-02-25 | 广东电网有限责任公司广州供电局 | Detection system for transformer insulation aging |
| CN114088922B (en) * | 2021-11-08 | 2024-03-05 | 广东电网有限责任公司广州供电局 | Detection system for transformer insulation aging |
| CN117169638A (en) * | 2023-11-02 | 2023-12-05 | 湖南华夏特变股份有限公司 | Transformer insulation paper aging degree detection method, system, equipment and storage medium |
| CN117169638B (en) * | 2023-11-02 | 2024-01-12 | 湖南华夏特变股份有限公司 | Transformer insulation paper aging degree detection method, system, equipment and storage medium |
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Effective date of registration: 20230403 Address after: No. 998 Xinghua Fifth Road, Xinjin District, Chengdu City, Sichuan Province, 611400 (Industrial Park) Patentee after: Sichuan Zhongxin General Electric Power Co.,Ltd. Address before: 611756 Research Institute of Science and Technology Development, Southwest Jiaotong University, Chengdu High-tech Zone, Sichuan Province Patentee before: SOUTHWEST JIAOTONG University |