CN212320944U - Transformer insulating oil temperature acquisition transmission circuit trouble shooting device - Google Patents
Transformer insulating oil temperature acquisition transmission circuit trouble shooting device Download PDFInfo
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- CN212320944U CN212320944U CN202020936622.6U CN202020936622U CN212320944U CN 212320944 U CN212320944 U CN 212320944U CN 202020936622 U CN202020936622 U CN 202020936622U CN 212320944 U CN212320944 U CN 212320944U
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Abstract
The utility model provides a transformer insulating oil temperature acquisition transmission circuit troubleshooting device, which comprises a frame, be equipped with high accuracy resistance test module, current-voltage output test module and high accuracy resistance simulation module in the frame, be equipped with the thermal bulb heating simulation module on the frame terminal surface, the frame is equipped with power plug and earth connection, high accuracy resistance test module and current-voltage output test module are connected with the power plug electricity, high accuracy resistance test module, current-voltage output test module, high accuracy resistance simulation module and power plug are connected with the earth connection. The utility model discloses can effectively find out the oil temperature and gather the key link that the transmission in-process broke down, guarantee that the staff can long-range true monitoring transformer oil temperature.
Description
Technical Field
The utility model belongs to the technical field of the troubleshooting technique and specifically relates to a transformer insulating oil temperature acquisition transmission circuit troubleshooting device is related to.
Background
The overhaul and maintenance of the relay protection and measurement and control device of the transformer substation can treat several defects related to abnormal acquisition of the main transformer oil temperature every year, and the defects are mainly characterized in that the difference between the indicated value of a field oil temperature meter and the background and remote monitoring display values is more than 5 ℃. The operating regulations of power transformers (DL/T572-2010) have clear regulations on the top oil temperature of oil-immersed transformers under rated voltage, and the highest top oil temperature of self-cooling transformers is 95 ℃ and the highest top oil temperature of forced oil circulation air-cooling transformers is 85 ℃. And according to the regulation of transformer operation standard of national grid company, when the maximum deviation among the on-site pointer type temperature display value, the control room temperature display value and the computer monitoring system temperature data is more than 5 ℃, the transformer temperature data is regarded as unqualified. Therefore, how to improve the qualification rate of the main transformer oil temperature telemetering data plays an important role in ensuring the safe and stable operation of the main transformer.
At present, the principle of a main transformer oil temperature acquisition telemetering loop is as follows: the resistance value of a thermosensitive platinum resistor PT100 soaked in insulating oil of a main transformer can be changed linearly along with the temperature, the temperature indicated by a body of the transformer is monitored by a temperature bulb which is a totally-enclosed pressure type thermometer, the temperature is communicated with an external circuit through a wiring terminal, a heated resistance signal can be converted into an electric signal of 4-20mA or 0-5V through a temperature transmitter to be transmitted to a main transformer measurement and control device, and then the electric signal is converted into a network signal to be transmitted to a server display and a monitoring system through a switch.
The oil temperature acquisition loop of the power transformer passes through more equipment, the number of conversion transmission links is large, related detection instruments are lacked, in the prior defect processing process, some maintainers randomly modify some parameters of the related equipment in the oil temperature acquisition loop in order to complete the elimination task under the condition that the root cause of the defect is not found out, when the oil temperature fluctuates greatly, the defect appears again, and therefore the repeated elimination phenomenon occurs occasionally.
SUMMERY OF THE UTILITY MODEL
Because of lacking detecting instrument to power transformer oil temperature acquisition return circuit, the problem of the repeated disappearance that leads to of artificial participation, the utility model provides a transformer insulating oil temperature acquisition transmission return circuit troubleshooting device is applicable to the troubleshooting of power transformer insulating oil temperature acquisition transmission return circuit, can effectively find out the oil temperature and gather the key link that breaks down in the transmission process, guarantees that the staff can long-range true monitoring transformer oil temperature.
In order to achieve the above object, the present invention provides the following technical solutions:
the utility model provides a transformer insulating oil temperature acquisition transmission circuit troubleshooting device, includes the frame, be equipped with high accuracy resistance test module, current-voltage output test module and high accuracy resistance simulation module in the frame, be equipped with the thermal bulb heating simulation module on the frame terminal surface, the frame is equipped with power plug and earth connection, high accuracy resistance test module and current-voltage output test module are connected with the power plug electricity, high accuracy resistance test module, current-voltage output test module, high accuracy resistance simulation module and power plug are connected with the earth connection.
The four modules can quickly judge and investigate faults occurring in each link in the oil temperature acquisition loop of the power transformer, and the faults are divided into four categories: a platinum resistance failure; failure of the pressure thermometer; a transmitter failure; a network parameter failure.
The system can detect various faults of the oil temperature acquisition loop of the power transformer, is comprehensive and visual, effectively avoids the repeated defect elimination phenomenon caused by manual detection intervention, effectively finds out the key link of the fault in the oil temperature acquisition transmission process, and ensures that a worker can remotely and really monitor the oil temperature of the transformer.
In order to diagnose whether a transmitter in an oil temperature acquisition circuit of the power transformer has faults, the temperature T1 displayed by a monitoring display screen and the value T2 of a pressure type thermometer of a transformer body are recorded firstly. And then measuring the resistance value R of the platinum resistor, and calculating the current I or U to be output when the transmitter normally works according to a manufacturer name plate of the field transmitter. And disconnecting the original transmitter output loop, and connecting the current and voltage output test module to the loop instead of the transmitter. The value of the simulation resistor R0 is set on the high-precision resistor simulation module, so that the current I or U which is output when the matching transmitter normally works is output, and the temperature value T3 is observed and displayed on the loop terminal monitoring display screen.
Preferably, the bulb heating simulation module comprises a liquid temperature sensing bulb, a thermometer and a communicating vessel capillary tube, the liquid temperature sensing bulb is communicated with the communicating vessel capillary tube, the communicating vessel capillary tube is communicated with an elastic element of the pressure type thermometer to be measured, a temperature measuring part of the thermometer is arranged in the liquid temperature sensing bulb, and the liquid temperature sensing bulb is placed in warm water.
As preferred, high accuracy resistance test module is including setting up magnetoelectric direct current ammeter, analog-to-digital conversion chip and the electronic counter in the frame and setting up the liquid crystal display at the frame terminal surface and setting up the measuring pen outside the frame, the frame terminal surface is equipped with the wire hole, the measuring pen is equipped with two, attaching plug's one end is connected in the one end of magnetoelectric direct current ammeter, and attaching plug's the other end and the other end of magnetoelectric direct current ammeter pass through the wire hole and are connected with the measuring pen, magnetoelectric direct current ammeter is connected with analog-to-digital conversion chip electricity, analog-to-digital conversion chip is connected with the electronic counter electricity, the electronic counter is connected with the liquid crystal display electricity.
Preferably, the current and voltage output testing module comprises a voltage dividing resistor R1Current output port and voltage output port, divider resistance R1The current output port, the high-precision resistance testing module and the power module are connected in series, the voltage output port is connected with the high-precision resistance testing module in parallel, and the current output port and the voltage output port are arranged on the end face of the rack.
Preferably, the adjusting resistor of the high-precision resistor simulation module is provided with five gears which correspond to resistance values of various orders of magnitude and are connected in series by five gears of 10 × 100 Ω, 10 × 10 Ω, 10 × 1 Ω, 10 × 0.1 Ω and 10 × 0.01 Ω, each gear is provided with a knob, the knob is arranged on the end face of the rack, the end face of the rack is provided with an adjusting resistor output hole, the adjusting resistor output hole is provided with a clamping piece, and the clamping piece is connected with the output end of the adjusting resistor.
Preferably, the power plug is connected with a constant direct current power supply module, and the power plug is connected with a safety switch.
The utility model discloses can the fault that each link appears in the fast judgement investigation power transformer oil temperature acquisition return circuit, effectively avoid because of the repeated emergence of disappearing scarce phenomenon that human detection intervenes and leads to, effectively find out the oil temperature and gather the key link that breaks down in the transmission course, guarantee that the staff can long-range true monitoring transformer oil temperature.
Drawings
FIG. 1 is a schematic structural view of the present embodiment;
FIG. 2 is a diagram of a high-precision resistor simulation module in the present embodiment;
FIG. 3 is a schematic circuit diagram of a current-voltage output test module according to the present embodiment;
wherein: 1. The device comprises a frame 2, a safety switch 3, a power plug 4, a ground wire 5, a liquid crystal display screen 6, a wire outlet hole 7, a measuring pen 8, an adjusting resistor output hole 9, an adjusting resistor 10, a current output port 11, a voltage output port 12, a communicating vessel capillary tube 13, a liquid temperature sensing bulb 14 and a thermometer.
Detailed Description
Example (b):
this embodiment provides a transformer insulating oil temperature acquisition transmission circuit troubleshooting device, refer to fig. 1, including frame 1, be equipped with high accuracy resistance test module in the frame 1, current-voltage output test module and high accuracy resistance simulation module, be equipped with temperature bulb heating simulation module on the frame 1 terminal surface, frame 1 is equipped with power plug 3 and earth connection 4, high accuracy resistance test module and current-voltage output test module are connected with power plug 3 electricity, high accuracy resistance test module, current-voltage output test module, high accuracy resistance simulation module and power plug 3 are connected with earth connection 4. The bulb heating simulation module comprises a liquid temperature sensing bulb 13, a thermometer 14 and a communicating vessel capillary tube 12, wherein the liquid temperature sensing bulb 13 is communicated with the communicating vessel capillary tube 12, the communicating vessel capillary tube 12 is communicated with an elastic element of a pressure type thermometer to be measured, the temperature measuring part of the thermometer 14 is arranged in the liquid temperature sensing bulb 13, and the liquid temperature sensing bulb 13 is placed in warm water.
Referring to fig. 2, the adjusting resistor 9 of the high-precision resistor simulation module is provided with five gears, which correspond to resistance values of various orders of magnitude respectively, and are connected in series with five gears of 10 × 100 Ω, 10 × 10 Ω, 10 × 1 Ω, 10 × 0.1 Ω, and 10 × 0.01 Ω, each gear is provided with a knob, the knob is arranged on an end face of the rack 1, the end face of the rack 1 is provided with an adjusting resistor output hole 8, the adjusting resistor output hole 8 is provided with a clamping piece, and the clamping piece is connected with an output end of the adjusting resistor 9. A platinum resistance output can be simulated. And according to the target resistance value, sequentially rotating each gear knob, multiplying the values by corresponding magnitude orders, and then adding the values. The power plug 3 is connected with a constant direct current power supply module, and the power plug 3 is connected with a safety switch 2.
The high-precision resistance testing module comprises a magnetoelectric direct current ammeter arranged in a rack 1, an analog-to-digital conversion chip, an electronic counter, a liquid crystal display 5 arranged on the end face of the rack 1, and a measuring pen 7 arranged outside the rack 1, wherein the end face of the rack 1 is provided with wire holes 6, the measuring pen 7 is provided with two branches, one end of a power plug 3 is connected with one end of the magnetoelectric direct current ammeter, the other end of the power plug 3 and the other end of the magnetoelectric direct current ammeter are connected with the measuring pen 7 through the wire holes 6, the magnetoelectric direct current ammeter is electrically connected with the analog-to-digital conversion chip, the analog-to-digital conversion chip is electrically connected with the electronic counter, and the electronic counter is.
When measuring the platinum resistor, the anode and the cathode of the measuring pen are connected with two ends of the resistor, the constant voltage source with the known voltage value of U pressurizes the resistor, the value of the magnetoelectric sensitive ammeter is I, the analog quantity is converted into the digital quantity through the analog-to-digital conversion chip, and the value of the resistor R is displayed to the liquid crystal display screen through the electronic counter according to the ohm law R = U/I.
Referring to fig. 3, the current voltage output test module includes a voltage dividing resistor R1 Current output port 10, voltage output port 11, and voltage dividing resistor R1、The current output port 10, the high-precision resistance testing module and the power module are connected in series, the voltage output port 11 is connected with the high-precision resistance testing module in parallel, and the current output port 10 and the voltage output port 11 are arranged on the end face of the rack 1.
The four modules can quickly judge and investigate faults occurring in each link in the oil temperature acquisition loop of the power transformer, and the faults are divided into four categories: a platinum resistance failure; failure of the pressure thermometer; a transmitter failure; a network parameter failure. In order to diagnose whether a transmitter in an oil temperature acquisition circuit of the power transformer has faults, the temperature T1 displayed by a monitoring display screen and the value T2 of a pressure type thermometer of a transformer body are recorded firstly. And then measuring the resistance value R of the platinum resistor, and calculating the current I or U to be output when the transmitter normally works according to a manufacturer name plate of the field transmitter. And disconnecting the original transmitter output loop, and connecting the current and voltage output test module to the loop instead of the transmitter. The value of the simulation resistor R0 is set on the high-precision resistor simulation module, so that the current I or U which is output when the matching transmitter normally works is output, and the temperature value T3 is observed and displayed on the loop terminal monitoring display screen.
The utility model discloses can the fault that each link appears in the fast judgement investigation power transformer oil temperature acquisition return circuit, effectively avoid because of the repeated emergence of disappearing scarce phenomenon that human detection intervenes and leads to, effectively find out the oil temperature and gather the key link that breaks down in the transmission course, guarantee that the staff can long-range true monitoring transformer oil temperature.
Claims (6)
1. The utility model provides a transformer insulating oil temperature acquisition transmission circuit troubleshooting device, characterized by, includes frame (1), be equipped with high accuracy resistance test module, current-voltage output test module and high accuracy resistance analog module in frame (1), be equipped with temperature package heating analog module on frame (1) terminal surface, frame (1) is equipped with power plug (3) and earth connection (4), high accuracy resistance test module and current-voltage output test module are connected with power plug (3) electricity, high accuracy resistance test module, current-voltage output test module, high accuracy resistance analog module and power plug (3) are connected with earth connection (4).
2. The transformer insulating oil temperature acquisition and transmission loop fault clearing device as claimed in claim 1, wherein the bulb heating simulation module comprises a liquid temperature sensing bulb (13), a thermometer (14) and a communicator capillary tube (12), the liquid temperature sensing bulb (13) is communicated with the communicator capillary tube (12), the communicator capillary tube (12) is communicated with an elastic element of a pressure type thermometer to be measured, a temperature measuring part of the thermometer (14) is arranged in the liquid temperature sensing bulb (13), and the liquid temperature sensing bulb (13) is placed in warm water.
3. The transformer insulating oil temperature acquisition transmission loop troubleshooting device as claimed in claim 1, characterized in that said high precision resistance test module comprises a magnetoelectric DC ammeter, an analog-to-digital conversion chip and an electronic counter arranged in a frame (1), a liquid crystal display (5) arranged on an end face of the frame (1) and a measuring pen (7) arranged outside the frame (1), said end face of the frame (1) is provided with a wire outlet (6), said measuring pen (7) is provided with two branches, one end of said power plug (3) is connected to one end of the magnetoelectric DC ammeter, the other end of the power plug (3) and the other end of the magnetoelectric DC ammeter are connected to the measuring pen (7) through the wire outlet (6), said magnetoelectric DC ammeter is electrically connected to the analog-to-digital conversion chip, said analog-to-digital conversion chip is electrically connected to the electronic counter, the electronic counter is electrically connected with the liquid crystal display screen (5).
4. The fault removing device for the transformer insulating oil temperature acquisition and transmission loop according to claim 1, wherein the current and voltage output test module comprises a voltage dividing resistor R1A current output port (10) and a voltage output port (11), and the divider resistor R1The high-precision resistance testing device comprises a frame (1), a current output port (10), a high-precision resistance testing module and a power module which are connected in series, wherein the voltage output port (11) is connected with the high-precision resistance testing module in parallel, and the current output port (10) and the voltage output port (11) are arranged on the end face of the frame (1).
5. The fault clearing device for the transformer insulating oil temperature acquisition transmission loop according to claim 1, wherein five gears are arranged on the adjusting resistor (9) of the high-precision resistor simulation module, the five gears correspond to resistance values of various orders of magnitude respectively and are in series connection with 10 x 100 Ω, 10 x 10 Ω, 10 x 1 Ω, 10 x 0.1 Ω and 10 x 0.01 Ω, each gear is provided with a knob, the knobs are arranged on the end face of the rack (1), the end face of the rack (1) is provided with adjusting resistor output holes (8), the adjusting resistor output holes (8) are provided with clamping pieces, and the clamping pieces are connected with the output end of the adjusting resistor (9).
6. The transformer insulating oil temperature acquisition and transmission loop fault clearing device as claimed in claim 1, characterized in that a constant direct current power supply module is connected to the power plug (3), and a safety switch (2) is connected to the power plug (3).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020936622.6U CN212320944U (en) | 2020-05-28 | 2020-05-28 | Transformer insulating oil temperature acquisition transmission circuit trouble shooting device |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020936622.6U CN212320944U (en) | 2020-05-28 | 2020-05-28 | Transformer insulating oil temperature acquisition transmission circuit trouble shooting device |
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| CN212320944U true CN212320944U (en) | 2021-01-08 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111814302A (en) * | 2020-05-28 | 2020-10-23 | 嘉兴市恒光电力建设有限责任公司 | Fault removing system and method for transformer insulating oil temperature acquisition and transmission loop |
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2020
- 2020-05-28 CN CN202020936622.6U patent/CN212320944U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111814302A (en) * | 2020-05-28 | 2020-10-23 | 嘉兴市恒光电力建设有限责任公司 | Fault removing system and method for transformer insulating oil temperature acquisition and transmission loop |
| CN111814302B (en) * | 2020-05-28 | 2024-03-08 | 嘉兴市恒光电力建设有限责任公司 | Transformer insulating oil temperature acquisition transmission loop fault removal system and method |
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