CN110864825A - Temperature detection system - Google Patents
Temperature detection system Download PDFInfo
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- CN110864825A CN110864825A CN201911107607.9A CN201911107607A CN110864825A CN 110864825 A CN110864825 A CN 110864825A CN 201911107607 A CN201911107607 A CN 201911107607A CN 110864825 A CN110864825 A CN 110864825A
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- temperature
- state
- cabinet body
- measuring sensor
- equipment
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01K—MEASURING TEMPERATURE; MEASURING QUANTITY OF HEAT; THERMALLY-SENSITIVE ELEMENTS NOT OTHERWISE PROVIDED FOR
- G01K13/00—Thermometers specially adapted for specific purposes
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01K—MEASURING TEMPERATURE; MEASURING QUANTITY OF HEAT; THERMALLY-SENSITIVE ELEMENTS NOT OTHERWISE PROVIDED FOR
- G01K1/00—Details of thermometers not specially adapted for particular types of thermometer
- G01K1/02—Means for indicating or recording specially adapted for thermometers
- G01K1/026—Means for indicating or recording specially adapted for thermometers arrangements for monitoring a plurality of temperatures, e.g. by multiplexing
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
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- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Measuring Temperature Or Quantity Of Heat (AREA)
Abstract
The invention relates to the field of electric power temperature measurement, and discloses a temperature detection system which specifically comprises at least one cabinet body and a data processing unit; each cabinet body comprises at least one chamber and a temperature measuring sensor, and the temperature measuring sensor is arranged in each cabinet body and/or each chamber; the data processing unit is respectively connected with each temperature measuring sensor through a network, collects the temperature signal of each temperature measuring sensor, and performs analysis, diagnosis and result output display. Through the technical scheme provided by the invention, the temperature of the power equipment can be conveniently detected, the requirement of the temperature measuring sensor is reduced, the cost is low, the construction is simple, and the installation and maintenance can be carried out under the condition of no power failure.
Description
Technical Field
The invention relates to the field of electric power temperature measurement, in particular to a temperature detection system.
Background
The safety and reliability of power equipment are important links of ultra-large-scale power transmission and distribution and power grid safety guarantee, particularly, China is in the period of rapid economic growth, the power supply load of the national power grid is increasing day by day, and a series of safety problems are brought to power grid electrical equipment while power supply is continuously expanded. In order to avoid various power accidents as much as possible, the task of monitoring the safe operation of power equipment in real time is urgent.
The contact resistance of the power equipment is increased due to the poor contact of the moving contact and the fixed contact of the high-voltage circuit breaker and factors such as long-term heavy current, contact aging and the like, so that the power equipment generates heat for a long time, the temperature rise of the contact is too high, and even a high-voltage cabinet burning accident finally occurs. With the increase of the operation time, the loosening of the crimping head, the aging of the insulation, the partial discharge, the high-voltage leakage and the like, the heating and the temperature rise are caused, the operation condition is further deteriorated, the temperature is further increased, and the short circuit blasting and even the fire disaster are caused as a result of the vicious circle.
The traditional temperature measurement mode has long period, complicated construction and low efficiency, is not convenient to manage, and consumes a large amount of manpower and physical investigation when a fault occurs. In a specific occasion, the monitoring points are scattered, the environment is closed or high voltage exists, and many temperature measurement modes cannot realize measurement.
Therefore, a system applicable to power equipment for conveniently detecting the temperature of the power equipment is needed.
Disclosure of Invention
The invention provides a temperature detection system which is convenient to detect the temperature of power equipment, reduces the requirement of a temperature measurement sensor, has low cost and simple construction, and can be installed and maintained without power failure.
In order to achieve the above object, the temperature detection system provided by the present invention comprises at least one cabinet and a data processing unit; wherein the content of the first and second substances,
each cabinet body comprises at least one chamber and a temperature measuring sensor, and the temperature measuring sensor is arranged in each cabinet body and/or each chamber;
the data processing unit is respectively connected with each temperature measuring sensor through a network, collects the temperature signal of each temperature measuring sensor, and performs analysis, diagnosis and result output display.
Further, the data processing unit includes:
the operation state and health state diagnosis module is used for analyzing and diagnosing the operation state of the equipment by using the temperature signal, analyzing and diagnosing the health state of the equipment by using the temperature signal and the monitored load current data, and outputting the states of the cabinet body and the indoor equipment, wherein the states comprise the operation state and the health state;
and the display module is used for displaying the states of the cabinet body and the indoor equipment.
Further, the operating condition and health condition diagnostic module includes:
the temperature monitoring unit is used for collecting temperature signals so as to calculate temperature rise; the temperature signal comprises the measured environment temperature of the cabinet body and the measured outer surface temperature of each compartment, which are monitored by the temperature measuring sensor; the temperature rise is the temperature change trend after the temperature data are processed;
the current monitoring unit is used for monitoring and collecting load current data, and the load current data are three-phase current data values; the load current data is used for calculating the load theoretical temperature rise according to the load temperature rise theory;
the operation unit is used for respectively calculating the theoretical temperature rise and the actually measured temperature rise of the load according to the load temperature rise theory to obtain a variation coefficient;
the diagnosis unit is used for comparing the theoretical temperature rise with the actual temperature rise according to a variation coefficient so as to diagnose the state of the equipment;
and the alarm unit is used for giving an alarm prompt when the diagnosis unit diagnoses that the equipment is in a fault state.
Furthermore, the display module is used for displaying each compartment framework and each temperature measuring sensor installation position of the cabinet body according to different cabinet body section structures, identifying the current state of each compartment and displaying the current equipment state.
Compared with the prior art, the temperature detection system provided by the invention is convenient for detecting the temperature of the power equipment, reduces the requirement of the temperature measurement sensor, is low in cost, is simple to construct, and can be installed and maintained without power failure.
Drawings
Fig. 1 is a schematic structural diagram of a temperature detection system according to an embodiment of the present invention;
FIG. 2 is a schematic diagram of the internal structure of the operating condition and health diagnostic module of FIG. 1;
fig. 3 is a schematic structural view of the cabinet in fig. 1.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is described in further detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Referring to fig. 1, an embodiment of the invention provides a temperature detection system, which includes at least one cabinet 10 and a data processing unit 20; wherein each cabinet 10 comprises at least one compartment 110 and a temperature sensor 120. Each compartment 110 and each cabinet 10 are provided with the temperature measuring sensor 120.
The data processing unit 20 is connected to each temperature sensor 120 through a network and collects a temperature signal of each temperature sensor 120. The network can be wireless, data line, bluetooth and any other connection mode.
The data processing unit 20 monitors the load current data through the power grid management system at the same time.
The data processing unit 20 comprises an operating status and health status diagnostic module 21, and a presentation module 22; the operating state and health state diagnosing module 21 is configured to use the temperature signal for device operating state analysis and diagnosis, use the temperature signal and the monitored load current data for device health state analysis and diagnosis, and output states of the cabinet and the indoor units, where the states include an operating state and a health state;
the display module 22 is used for displaying the states of the cabinet and the equipment in the sub-chambers.
When the temperature of a certain monitoring point is needed, the temperature change of the point body is estimated through the health state diagnosis module in a mode of indirectly monitoring other peripheral media instead of directly contacting the point body, the temperature measurement mode is called temperature detection and is also called non-intrusive temperature measurement, wherein the temperature detection point is a joint between temperature measurements.
Referring to fig. 2, an internal structure diagram of the operation state and health state diagnosis module 21 is shown, where the operation state and health state diagnosis module 21 includes:
a temperature monitoring unit 211 for collecting temperature signals for calculating a temperature rise; the temperature signal comprises the measured environment temperature of the cabinet body and the measured outer surface temperature of each compartment, which are monitored by the temperature measuring sensor; the temperature rise is a temperature change trend after the temperature data are processed.
The current monitoring unit 212 is used for monitoring load current data, wherein the load current data are three-phase current data values; the load current data is used for calculating the theoretical temperature rise of the load according to the load temperature rise theory; the load temperature rise theory is used for analyzing the temperature change condition of the power equipment contact in a load state by means of the heat transfer theory aiming at the close correlation between the power equipment fault and the equipment contact temperature, and predicting the load temperature rise trend to obtain the theoretical temperature rise change.
The operation unit 213 is configured to calculate the theoretical temperature rise of the load and the actually measured temperature rise respectively according to a load temperature rise theory, so as to obtain a variation coefficient; the operation unit 213 calculates the theoretical temperature of the corresponding monitoring point in the environment by using the monitored load current data to obtain the theoretical temperature rise of the load, then obtains a variation coefficient by comparing the theoretical temperature rise of the load with the actually measured temperature rise, and diagnoses the fault state and/or the health state according to the variation coefficient, thereby calculating the temperature value of the total heat collection source in each compartment by using the health state diagnosis module, and diagnosing the current comprehensive temperature rise state of each compartment.
A diagnosing unit 214, configured to compare the theoretical temperature rise with the actual temperature rise according to a variation coefficient, so as to diagnose a state of the device; wherein the status of the device includes an operational status and a health status; in one embodiment, the health of the device is a fault when the temperature exceeds 45 ℃; when the temperature is below 45 ℃, the health state of the device is normal.
An alarm unit 215 for giving an alarm prompt when the diagnostic unit 214 diagnoses that the state of the device is a fault; the alarm prompt can be performed according to an alarm threshold, the alarm threshold can be preset, and in one embodiment, the alarm threshold is set as follows: when the temperature is lower than 45 ℃, no alarm prompt is given in a normal state; when the temperature exceeds 45 ℃, performing attention warning and alarm prompting; when the temperature exceeds 55 ℃, carrying out overheating early warning and alarming prompt; when the temperature exceeds 65 ℃, carrying out overheating alarm prompt.
In specific implementation, different cabinets have different compartments, each compartment includes an instrument room, a breaker room, a cable room and a busbar room, in the cabinet provided in an embodiment shown in fig. 3, the cabinet includes a compartment 111, a compartment 112, a compartment 113 and a compartment 114, a first temperature sensor 131 is disposed in the compartment 111, a second temperature sensor 132 is disposed at a pressure relief window 122 in the compartment 112, a third temperature sensor 133 is disposed at a pressure relief window 123 in the compartment 113, a fourth temperature sensor 134 is disposed at a pressure relief window 124 in the compartment 114, and a fifth temperature sensor 135 is disposed at a side surface of the cabinet.
Temperature signals are collected by the temperature measuring sensors in the cabinet body, the temperature signals are collected by the data processing unit, and the running state of the equipment in each compartment is diagnosed and analyzed one by the running state and health state diagnosis module. The operation state and health state diagnosis module respectively diagnoses and calculates the measured temperature rise of the measuring points of each chamber through the environment temperature of the cabinet body and the temperature of the pressure relief windows on the outer surface of each chamber, which are monitored by the external temperature measuring sensors.
The display module 32 is used for displaying each compartment framework of the cabinet body and each temperature measuring sensor installation position according to different cabinet body section structures, identifying the current state of each compartment, and displaying the current equipment state.
Compared with the prior art, the temperature detection system provided by the invention is convenient for detecting the temperature of the power equipment, reduces the requirement of the temperature measurement sensor, is low in cost, is simple to construct, and can be installed and maintained without power failure.
Claims (6)
1. A temperature detection system is characterized by comprising at least one cabinet body and a data processing unit; wherein the content of the first and second substances,
each cabinet body comprises at least one chamber and a temperature measuring sensor, and the temperature measuring sensor is arranged in each cabinet body and/or each chamber;
the data processing unit is respectively connected with each temperature measuring sensor through a network, collects the temperature signal of each temperature measuring sensor, and performs analysis, diagnosis and result output display.
2. The temperature sensing system of claim 1, wherein the data processing unit comprises:
the operation state and health state diagnosis module is used for analyzing and diagnosing the operation state of the equipment by using the temperature signal, analyzing and diagnosing the health state of the equipment by using the temperature signal and the monitored load current data, and outputting the states of the cabinet body and the indoor equipment, wherein the states comprise the operation state and the health state;
and the display module is used for displaying the states of the cabinet body and the indoor equipment.
3. The temperature detection system of claim 2, wherein the operating condition and health diagnostic module comprises:
the temperature monitoring unit is used for collecting temperature signals so as to calculate temperature rise; the temperature signal comprises the measured environment temperature of the cabinet body and the measured outer surface temperature of each compartment, which are monitored by the temperature measuring sensor; the temperature rise is the temperature change trend after the temperature data are processed;
the current monitoring unit is used for monitoring and collecting load current data, and the load current data are three-phase current data values; and the load current data is used for calculating the load theoretical temperature rise according to the load temperature rise theory.
4. The temperature detection system of claim 2, wherein the operating condition and health diagnostic module further comprises:
the operation unit is used for respectively calculating the theoretical temperature rise and the actually measured temperature rise of the load according to the load temperature rise theory to obtain a variation coefficient;
and the diagnosis unit is used for comparing the theoretical temperature rise with the actual temperature rise according to the variation coefficient so as to diagnose the state of the equipment.
5. The temperature detection system of claim 2, wherein the operating condition and health diagnostic module further comprises:
and the alarm unit is used for giving an alarm prompt when the diagnosis unit diagnoses that the equipment is in a fault state.
6. The temperature detection system according to claim 2, wherein the display module is configured to display the current state of each compartment and the current equipment state according to the sectional structures of different cabinets and the installation positions of the temperature measurement sensors.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911107607.9A CN110864825A (en) | 2019-11-13 | 2019-11-13 | Temperature detection system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911107607.9A CN110864825A (en) | 2019-11-13 | 2019-11-13 | Temperature detection system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN110864825A true CN110864825A (en) | 2020-03-06 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201911107607.9A Pending CN110864825A (en) | 2019-11-13 | 2019-11-13 | Temperature detection system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN110864825A (en) |
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2019
- 2019-11-13 CN CN201911107607.9A patent/CN110864825A/en active Pending
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