CN217280336U - Protection system of dry type transformer - Google Patents
Protection system of dry type transformer Download PDFInfo
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- CN217280336U CN217280336U CN202123028276.5U CN202123028276U CN217280336U CN 217280336 U CN217280336 U CN 217280336U CN 202123028276 U CN202123028276 U CN 202123028276U CN 217280336 U CN217280336 U CN 217280336U
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- type transformer
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- circuit breaker
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y04—INFORMATION OR COMMUNICATION TECHNOLOGIES HAVING AN IMPACT ON OTHER TECHNOLOGY AREAS
- Y04S—SYSTEMS INTEGRATING TECHNOLOGIES RELATED TO POWER NETWORK OPERATION, COMMUNICATION OR INFORMATION TECHNOLOGIES FOR IMPROVING THE ELECTRICAL POWER GENERATION, TRANSMISSION, DISTRIBUTION, MANAGEMENT OR USAGE, i.e. SMART GRIDS
- Y04S40/00—Systems for electrical power generation, transmission, distribution or end-user application management characterised by the use of communication or information technologies, or communication or information technology specific aspects supporting them
- Y04S40/12—Systems for electrical power generation, transmission, distribution or end-user application management characterised by the use of communication or information technologies, or communication or information technology specific aspects supporting them characterised by data transport means between the monitoring, controlling or managing units and monitored, controlled or operated electrical equipment
- Y04S40/124—Systems for electrical power generation, transmission, distribution or end-user application management characterised by the use of communication or information technologies, or communication or information technology specific aspects supporting them characterised by data transport means between the monitoring, controlling or managing units and monitored, controlled or operated electrical equipment using wired telecommunication networks or data transmission busses
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Abstract
The utility model relates to a protection system of dry-type transformer, include: the temperature detection device is used for monitoring the ambient temperature of the dry-type transformer; the method is characterized in that: further comprising: the optical fiber temperature sensing probes respectively extend into the iron core and each winding of the dry-type transformer to measure the temperature of the iron core and each phase of winding; the optical fiber temperature sensing probes are connected with the transmitter and used for converting signals received by each optical fiber temperature sensing probe in real time into temperature values; a protection device; and the processor is connected with the transmitter, the temperature detection device and the protection device and used for comparing the temperature value received by the transmitter with the environmental temperature monitored by the temperature detection device so as to control whether the protection device works or not. The system has the advantages that: the system has accurate temperature measurement and quick response; the requirement for measuring the actual temperature inside the transformer winding is met, the dry-type transformer is protected by combining the environmental temperature, and the dry-type transformer is prevented from being burnt due to overhigh temperature.
Description
Technical Field
The utility model relates to a dry-type transformer field, in particular to protection system of dry-type transformer.
Background
The safe operation and the service life of the new energy boosting dry-type transformer depend on the safety and the reliability of the insulation of the transformer winding to a great extent, the insulation life of the transformer winding is greatly influenced by the temperature, the high insulation of the transformer operating temperature is damaged and breakdown is caused, and transformer burning accidents such as short circuit inside the winding are caused, which is one of the main reasons that the transformer cannot work normally. Therefore, the hot spot temperature of the transformer is monitored in real time, corresponding protection actions are carried out, and the method has very practical significance for improving the safe operation of equipment, prolonging the insulation life of the equipment and improving the operation stability of the equipment.
At present, a combination mode of a Pt100 thermal resistor, a thermistor sensor and a temperature controller is mostly adopted as a temperature measurement protection measure of a transformer. However, the existing method has the following disadvantages: 1. pt100 thermal and thermistor are susceptible to electromagnetic field interference: the monitoring method of the temperature measuring sensor of the transformer by using the Pt100 thermal resistor and the thermistor is easy to be interfered by a conduction pulse group, radio frequency disturbance, surge and the like under the condition of strong interference of an electromagnetic field, so that the temperature controller is unstable in working to cause false alarm; 2. the temperature measurement errors of the Pt100 thermal resistor and the thermistor are large: the Pt100 thermal resistor, the thermistor and the transmission line are made of metal materials, and cannot directly contact with the winding to measure the winding temperature in real time, so that the difference between the time and the precision of the actual temperature of the transformer winding and the difference between the time and the precision of the temperature value which is transmitted to the temperature controller by the Pt100 temperature detector and displayed by the temperature controller are solved; 3. the Pt100 thermal resistor and the thermistor cannot adapt to a high-voltage detection environment, and the Pt100 thermal resistor, the thermistor and the transmission line are made of metal materials, so that the Pt100 thermal resistor and the thermistor are easily influenced by high voltage in the high-voltage detection environment, and a temperature controller measuring assembly is easy to burn.
SUMMERY OF THE UTILITY MODEL
The utility model aims to solve the technical problem that thereby provide a temperature measurement is more accurate can effectively prevent the protection system of high-temperature dry-type transformer to above-mentioned prior art.
The utility model provides a technical scheme that above-mentioned technical problem adopted does: a protection system for a dry-type transformer, comprising:
the temperature detection device is used for monitoring the ambient temperature of the dry-type transformer;
the method is characterized in that: further comprising:
the optical fiber temperature sensing probes respectively extend into the iron core and each winding of the dry-type transformer to measure the temperature of the iron core and each phase of winding;
the optical fiber temperature sensing probes are connected with the transmitter and used for converting signals received by each optical fiber temperature sensing probe in real time into temperature values;
a protection device;
and the processor is connected with the transmitter, the temperature detection device and the protection device and used for comparing the temperature value received by the transmitter with the environmental temperature monitored by the temperature detection device so as to control whether the protection device works or not.
In order to prevent the dry-type transformer from being burnt out due to overhigh temperature, the protection device comprises a fan, and the processor is used for controlling the fan to start when the temperature difference between the temperature value received by the transmitter and the environment temperature monitored by the temperature detection device is larger than a fan starting value.
Preferably, the fan is an axial fan.
In order to further protect the dry-type transformer, the protection device further comprises a high-voltage side circuit breaker and a low-voltage side circuit breaker, the high-voltage side circuit breaker is respectively connected with the high-voltage terminal of each phase of winding, the low-voltage side circuit breaker is respectively connected with the low-voltage terminal of each phase of winding, the high-voltage side circuit breaker is linked with the low-voltage side circuit breaker, and the high-voltage side circuit breaker is used for controlling the low-voltage side circuit breaker to trip through the processor when the temperature difference between the temperature value received by the transmitter and the environment temperature monitored by the temperature detection device is larger than a power-off starting value, and linking the high-voltage side circuit breaker to trip.
In the scheme, the dry-type transformer is a three-phase dry-type transformer and comprises an iron core, an A-phase winding, a B-phase winding and a C-phase winding.
Specifically, the number of the optical fiber temperature sensing probes is at least four.
Preferably, the number of the optical fiber temperature sensing probes is four, and the optical fiber temperature sensing probes are respectively arranged in the iron core, the phase A winding, the phase B winding and the phase C winding in a one-to-one correspondence manner.
Preferably, the optical fiber temperature sensing probe is made of quartz optical fiber.
Preferably, the temperature sensing means comprises a thermocouple which can be used to sense the ambient temperature.
Preferably, the dry-type transformer is a photovoltaic power generation dry-type transformer.
Compared with the prior art, the utility model has the advantages of: the iron core and each winding of the dry-type transformer are measured by a plurality of optical fiber temperature sensing probes, and the optical fiber temperature sensing probes have accurate temperature measurement and quick response; the temperature measurement device meets the requirement of measuring the actual temperature inside the transformer winding, is not interfered by an electromagnetic field and can bear high voltage, is very suitable for temperature measurement occasions of high voltage and strong magnetic field, and converts signals received by each optical fiber temperature sensing probe in real time into temperature numerical values through the transmitter, so that the processor can compare the temperature inside the dry-type transformer measured by the transmitter with the ambient temperature of the dry-type transformer monitored by the temperature detection device to control the protection system to carry out protection. Therefore, the system has accurate temperature measurement, can effectively combine the environmental temperature to protect the dry-type transformer, and prevents the dry-type transformer from being burnt due to overhigh temperature.
Drawings
Fig. 1 is a schematic block diagram of a protection system according to an embodiment of the present invention.
Detailed Description
The present invention will be described in further detail with reference to the following embodiments.
As shown in fig. 1, the protection system of the dry-type transformer in the present embodiment includes a temperature detection device 1, a plurality of fiber temperature-sensitive probes 2, a transmitter 3, a protection device 4, and a processor 5. The temperature detection device 1 is used for monitoring the ambient temperature of the dry-type transformer, and the optical fiber temperature sensing probes 2 respectively extend into an iron core and each winding of the dry-type transformer to measure the temperature of the iron core and each phase of winding; the plurality of optical fiber temperature-sensing probes 2 are connected with the transmitter 3 and are used for converting signals received by each optical fiber temperature-sensing probe 2 in real time into temperature values; the processor 5 is connected with the transmitter 3, the temperature detection device 1 and the protection device 4 and is used for comparing the temperature value received by the transmitter 3 with the environmental temperature monitored by the temperature detection device 1 to control whether the protection device 4 works or not, the processor 5 can use a 32-bit high-performance microcomputer processor in the box transformer measurement and control device, the operation speed is high, the sampling precision is high, and the temperature rise value of each main component of the dry-type transformer can be accurately calculated.
The protection device comprises a fan, a high-voltage side circuit breaker and a low-voltage side circuit breaker, wherein the processor is used for controlling the fan to start when the temperature difference between the temperature value received by the transmitter and the environment temperature monitored by the temperature detection device is larger than the fan starting value, the high-voltage side circuit breaker is respectively connected with the high-voltage terminal of each phase winding, the low-voltage side circuit breaker is respectively connected with the low-voltage terminal of each phase winding, the high-voltage side circuit breaker is linked with the low-voltage side circuit breaker, and the processor is used for controlling the low-voltage side circuit breaker to trip when the temperature difference between the temperature value received by the transmitter and the environment temperature monitored by the temperature detection device is larger than the power-off starting value, and linking the high-voltage side circuit breaker to trip. In this embodiment, the fan is an axial flow fan.
As shown in fig. 1, the dry-type transformer in the present embodiment is a three-phase dry-type transformer, and includes an iron core, an a-phase winding, a B-phase winding, and a C-phase winding. The number of the corresponding optical fiber temperature sensing probes is at least four, and in addition, in order to reduce the calculation amount of the transmitter, the number of the optical fiber temperature sensing probes in the embodiment is four, and the optical fiber temperature sensing probes are respectively arranged in the iron core, the phase a winding, the phase B winding and the phase C winding in a one-to-one correspondence manner. The dry-type transformer may be a dry-type transformer for photovoltaic power generation.
The optical fiber temperature sensing probe is made of quartz optical fiber materials, is small in size and can be used for measuring the high-low voltage winding and the internal iron core of the transformer in a contact mode; the temperature measurement is accurate, and the response is rapid; the requirement for measuring the actual temperature in the transformer winding is met, the electromagnetic field interference is avoided, the high voltage is resisted, and the temperature measuring device is very suitable for temperature measuring occasions with high voltage and strong magnetic fields. In addition, the temperature sensing device includes a thermocouple that can be used to sense the ambient temperature.
The working process of the protection system is as follows: the processor can receive and process the environmental temperature information detected by the temperature detection device and the temperature information of the optical fiber temperature sensing probes sent by the transmitter in real time, accurately calculates the temperature rise value of each main component (the winding A, the winding B, the winding C and the iron core) of the dry-type transformer by utilizing the numerical difference of the two temperature information, and compares the temperature rise value with the fan starting value and the breaker power-off starting value which are arranged in the processor. When the temperature rise value reaches the starting value of the fan, the processor sends a starting signal to the fan, and the fan is started to perform air cooling and cooling on the transformer so as to ensure that the operation temperature rise value of the transformer is kept in a safe range. When the temperature rise value reaches the temperature rise value of the dry type transformer during power failure and shutdown, the processor sends a tripping signal to the low-voltage side circuit breaker to control the low-voltage side circuit breaker to trip, and simultaneously, the high-voltage side circuit breaker is tripped in a linkage mode, the power supply of the dry type transformer is cut off completely, and therefore the dry type transformer is protected.
The foregoing is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, a plurality of improvements and decorations can be made without departing from the technical principle of the present invention, and these improvements and decorations should also be regarded as the protection scope of the present invention.
Claims (10)
1. A protection system for a dry-type transformer, comprising:
the temperature detection device is used for monitoring the ambient temperature of the dry-type transformer;
the method is characterized in that: further comprising:
the optical fiber temperature sensing probes respectively extend into the iron core and each winding of the dry-type transformer to measure the temperature of the iron core and each phase of winding;
the optical fiber temperature sensing probes are connected with the transmitter and used for converting signals received by each optical fiber temperature sensing probe in real time into temperature values;
a protection device;
and the processor is connected with the transmitter, the temperature detection device and the protection device and used for comparing the temperature value received by the transmitter with the ambient temperature monitored by the temperature detection device so as to control whether the protection device works or not.
2. A protection system for a dry-type transformer as claimed in claim 1, wherein: the protection device comprises a fan, and the processor is used for controlling the fan to start when the temperature difference between the temperature value received by the transmitter and the environment temperature monitored by the temperature detection device is larger than a fan starting value.
3. A protection system for a dry-type transformer as claimed in claim 2, wherein: the fan is an axial flow fan.
4. Protection system of a dry-type transformer according to claim 2, characterized in that: the protection device further comprises a high-voltage side circuit breaker and a low-voltage side circuit breaker, the high-voltage side circuit breaker is connected with a high-voltage terminal of each phase winding, the low-voltage side circuit breaker is connected with a low-voltage terminal of each phase winding, the high-voltage side circuit breaker is linked with the low-voltage side circuit breaker, and the high-voltage side circuit breaker is used for controlling tripping of the low-voltage side circuit breaker through the processor when the temperature difference between the temperature value received by the transmitter and the environment temperature monitored by the temperature detection device is larger than a power-off starting value and linking tripping of the high-voltage side circuit breaker.
5. A protection system for a dry-type transformer according to any one of claims 1 to 4, wherein: the dry type transformer is a three-phase dry type transformer and comprises an iron core, an A-phase winding, a B-phase winding and a C-phase winding.
6. A protection system of a dry-type transformer according to claim 5, wherein: the number of the optical fiber temperature sensing probes is at least four.
7. A protection system of a dry-type transformer according to claim 6, wherein: the number of the optical fiber temperature sensing probes is four, and the optical fiber temperature sensing probes are respectively arranged in the iron core, the A-phase winding, the B-phase winding and the C-phase winding in a one-to-one correspondence mode.
8. A protection system for a dry-type transformer according to any one of claims 1 to 4, wherein: the optical fiber temperature sensing probe is made of quartz optical fiber.
9. A protection system for a dry-type transformer according to any one of claims 1 to 4, wherein: the temperature sensing device includes a thermocouple that can be used to sense ambient temperature.
10. A protection system for a dry-type transformer according to any one of claims 1 to 4, wherein: the dry-type transformer is used for photovoltaic power generation.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202123028276.5U CN217280336U (en) | 2021-12-01 | 2021-12-01 | Protection system of dry type transformer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202123028276.5U CN217280336U (en) | 2021-12-01 | 2021-12-01 | Protection system of dry type transformer |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN217280336U true CN217280336U (en) | 2022-08-23 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202123028276.5U Active CN217280336U (en) | 2021-12-01 | 2021-12-01 | Protection system of dry type transformer |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN217280336U (en) |
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2021
- 2021-12-01 CN CN202123028276.5U patent/CN217280336U/en active Active
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Address after: 315031 No.17 and 22 Fenglin Road, Cicheng Town, Jiangbei District, Ningbo City, Zhejiang Province Patentee after: Ningbo Aokes Intelligent Technology Co.,Ltd. Address before: 315031 No.17 and 22 Fenglin Road, Cicheng Town, Jiangbei District, Ningbo City, Zhejiang Province Patentee before: NINGBO AUX HIGH TECHNOLOGY Co.,Ltd. |
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