CN205748668U - A kind of temperature intelligent monitoring device of oil-filled transformer - Google Patents
A kind of temperature intelligent monitoring device of oil-filled transformer Download PDFInfo
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- CN205748668U CN205748668U CN201620429058.2U CN201620429058U CN205748668U CN 205748668 U CN205748668 U CN 205748668U CN 201620429058 U CN201620429058 U CN 201620429058U CN 205748668 U CN205748668 U CN 205748668U
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Abstract
The temperature intelligent monitoring device of a kind of oil-filled transformer, belongs to transformer temperature monitoring technical field.It is characterized in that: include RTD sensor, A/D converting unit, CPU element, communication unit and output unit, the outfan of RTD sensor is connected with the input of A/D converting unit, the outfan of A/D converting unit is connected with the input of CPU element, the output port of CPU element is connected with output unit, the input/output port of CPU element is bi-directionally connected with communication unit, it is additionally provided with as RTD sensor, A/D converting unit, CPU element, communication unit and output unit provide the power supply unit of running voltage, it is respectively arranged with isolated location between described power supply unit and communication unit and output unit.In the temperature intelligent monitoring device of this oil-filled transformer, by arranging communication unit and isolated location, it is achieved that and effective communication between host computer, improve noiseproof feature during data output simultaneously.
Description
Technical field
The temperature intelligent monitoring device of a kind of oil-filled transformer, belongs to transformer temperature monitoring technical field.
Background technology
The transformator of power transmission and transformation system is mostly oil-immersed power transformer at present, and the life-span of transformator depends primarily on the life-span of insulation system.The deciding factor of promotion insulation ag(e)ing is heat effect, so being monitored and controlled of transformer temperature is most important to the life-span of transformer insulated thing.Domestic temperature of oil in transformer monitor is made up of two parts, a part is mechanical type thermometer, temperature is indicated by pointer, field observation is not directly perceived, and mechanical switch controls, and needs the pointer on manual toggle instrument dial plate to arrange alarming value, and the temperature alarming parameter needed for transformator typically has three, this is accomplished by there are 4 pointers on same dial plate, causes temperature reading inconvenient, easy confusion reigned;A part is thermal resistance thermometer, and the temperature signal exported by thermal resistance thermometer sends into temperature transmitter signal processing unit, and 4 ~ 20mA signal that the temperature signal of output is converted into standard carries out teletransmission, though signal can carry out teletransmission, but execute-in-place is complicated.More existing temperature transmission controllers, have RS485 to carry out telecommunication, but can not carry out reading and the reading of upper computer software of parameter at this locality portable notebook.
Summary of the invention
The technical problems to be solved in the utility model is: overcome the deficiencies in the prior art, it is provided that one achieves effective communication between host computer, the temperature intelligent monitoring device of the oil-filled transformer of noiseproof feature when simultaneously improve data output.
This utility model solves its technical problem and be the technical scheme is that the temperature intelligent monitoring device of this oil-filled transformer, it is characterized in that: include RTD sensor, A/D converting unit, CPU element, communication unit and output unit, the outfan of RTD sensor is connected with the input of A/D converting unit, the outfan of A/D converting unit is connected with the input of CPU element, the output port of CPU element is connected with output unit, the input/output port of CPU element is bi-directionally connected with communication unit, it is additionally provided with as RTD sensor, A/D converting unit, CPU element, communication unit and output unit provide the power supply unit of running voltage, it is respectively arranged with isolated location between described power supply unit and communication unit and output unit.
Preferably, described communication unit includes 485 communication units and USB communication unit, arranges described isolated location between power supply unit and 485 communication units.
Preferably, described output unit includes control output unit and the pick-up output unit of output 4 ~ 20mA current signal of output switching signal, arranges described isolated location between power supply unit and pick-up output unit.
Preferably, described power supply unit includes AC/DC converting unit, and 220V alternating current power supply connects the input of AC/DC converting unit, and AC/DC converting unit exports 5V DC source and 24V DC source respectively;
5V DC source is connected with the feeder ear of described RTD sensor, A/D converting unit, CPU element and communication unit, and 24V DC source is connected with the feeder ear of described output unit.
Preferably, the isolated location being arranged between described power supply unit and 485 communication units is 5VDC/DC isolated location.
Preferably, the isolated location being arranged between described power supply unit and pick-up output unit is 24VDC/DC isolated location.
Preferably, being additionally provided with LED display unit and key operation unit, the output port of described CPU element is connected with LED display unit, and key operation unit is connected with the input port of CPU element.
Preferably, the described output unit that controls includes relay and for driving the drive circuit of the actuating of relay.
Preferably, described RTD sensor is arranged on the top of oil tank of transformer.
Compared with prior art, this utility model is had the beneficial effect that
1, in the temperature intelligent monitoring device of this oil-filled transformer, by arranging communication unit and isolated location, it is achieved that and effective communication between host computer, improve noiseproof feature during data output simultaneously.
2, in the temperature intelligent monitoring device of this oil-filled transformer, the temperature intelligent monitoring device achieving this oil-filled transformer by arranging USB communication unit carries out communication by the form of USB and host computer, therefore the construction cycle of USB peripheral product is shortened, it is simple to this locality is read parameter and carries out the operation of 4 ~ 20mA linear gauging.Temperature intelligent monitoring device and host computer by this oil-filled transformer form communication, communications protocol uses ModbusRTU, after host computer reads out temperature monitoring data by USB port, it is simple to temperature data is analyzed, carry out the reference of transformer life for producer.
3, in the temperature intelligent monitoring device of this oil-filled transformer, above-mentioned key operation unit uses three conventional key circuits, it is easy in the temperature intelligent monitoring device of this oil-filled transformer, this is carried out function setting by key operation unit, facilitates user that parameter is set at the scene.
4, by arranging the pick-up output unit being connected with CPU element, can be by 4 ~ 20mA current signal of pick-up output unit output routine, the state of temperature of transformator can be monitored in real time by 4 ~ 20mA current signal, even if in the case of control room is not switched on RS485 communication, also the teletransmission of real time temperature can be realized, it is simple to the current temperature status of monitoring transformator.
5,5V isolation DC/DC unit and the 24V being arranged between pick-up output unit and AC/DC converting unit by being arranged between 485 communication units and AC/DC converting unit isolate DC/DC unit, can be that Unit 485 and pick-up output unit provide more stable working power, improve noiseproof feature during data output.
6, control output unit and include relay and for driving the drive circuit of the actuating of relay, when the temperature of transformator occurs abnormal, CPU element, by changing the level signal of its output port, drives the actuating of relay by drive circuit, it is simple to realize the warning of temperature anomaly.
Accompanying drawing explanation
Fig. 1 is the temperature intelligent monitoring device functional-block diagram of oil-filled transformer.
Detailed description of the invention
Fig. 1 is most preferred embodiment of the present utility model, and 1 pair of this utility model is described further below in conjunction with the accompanying drawings.
As shown in Figure 1, a kind of temperature intelligent monitoring device of oil-filled transformer, including: RTD sensor, A/D converting unit, CPU element, LED display unit, key operation unit, 485 communication units, USB communication unit, control output unit, transmitter output unit, 5V isolation DC/DC unit, 24V isolation DC/DC unit and AC/DC converting unit.
The outfan of RTD sensor is connected with the signal input part of A/D converting unit, and the signal output part of A/D converting unit is connected with the signal input part of CPU element.The output port of CPU element is connected with LED display unit, control output unit and pick-up output unit;The input/output port of CPU element is bi-directionally connected with 485 communication units and USB communication unit simultaneously;Key operation unit is connected with the input port of CPU element.
220V alternating current accesses the input of AC/DC converting unit, AC/DC converting unit is for the operationally required DC source of the temperature intelligent monitoring device that 220V alternating current is converted to this oil-filled transformer, in the temperature intelligent monitoring device of this oil-filled transformer, by AC/DC converting unit, 220V alternating current is respectively converted into 5V DC source and 24V DC source.The 5V DC source being converted to by AC/DC converting unit is respectively connecting to above-mentioned USB communication unit, key operation unit, LED display unit, RTD sensor, A/D converting unit and the feeder ear of CPU element, for the voltage needed for said units offer work.5V DC source is connected with 485 above-mentioned communication units by 5V isolation DC/DC unit simultaneously, provides the voltage needed for work for it.The 24V DC source being converted to by AC/DC converting unit is connected with the above-mentioned feeder ear controlling output unit, the voltage needed for work is provided for it, 24V DC source is connected with above-mentioned pick-up output unit by 24V isolation DC/DC unit simultaneously, provides the voltage needed for work for it.
In the temperature intelligent monitoring device of this oil-filled transformer, USB communication unit uses commercially available common USB bridging chip to realize, it is achieved thereby that the temperature intelligent monitoring device of this oil-filled transformer carries out communication by the form of USB and host computer, therefore the construction cycle of USB peripheral product is shortened, it is simple to this locality is read parameter and carries out the operation of 4 ~ 20mA linear gauging.Temperature intelligent monitoring device and host computer by this oil-filled transformer form communication, communications protocol uses ModbusRTU, after host computer reads out temperature monitoring data by USB port, it is simple to temperature data is analyzed, carry out the reference of transformer life for producer.
In the temperature intelligent monitoring device of this oil-filled transformer, above-mentioned key operation unit uses three conventional key circuits, it is easy in the temperature intelligent monitoring device of this oil-filled transformer, this is carried out function setting by key operation unit, facilitates user that parameter is set at the scene.
The pick-up output unit being connected with CPU element by setting, can be by 4 ~ 20mA current signal of pick-up output unit output routine, the state of temperature of transformator can be monitored in real time by 4 ~ 20mA current signal, even if in the case of control room is not switched on RS485 communication, also the teletransmission of real time temperature can be realized, it is simple to the current temperature status of monitoring transformator.
5V isolation DC/DC unit and the 24V being arranged between pick-up output unit and AC/DC converting unit by being arranged between 485 communication units and AC/DC converting unit isolate DC/DC unit, can be that Unit 485 and pick-up output unit provide more stable working power, improve noiseproof feature during data output.
Control output unit and include relay and for driving the drive circuit of the actuating of relay, when the temperature of transformator occurs abnormal, CPU element, by changing the level signal of its output port, drives the actuating of relay by drive circuit, it is simple to realize the warning of temperature anomaly.
Specific works process and operation principle are as follows:
A/D converting unit provides operating current by its outside biasing circuit for RTD sensor input, and RTD sensor is arranged on the top of oil tank for oil immersion type transformer, for measuring the top-oil temperature of oil-filled transformer.The analogue signal collected is passed to the A/D converting unit being attached thereto by RTD sensor input, convert analog signals into digital signal by A/D converting unit and send into CPU element, CPU element by the digital signal after conversion by data filtering, calculating, process after, one tunnel result is shown by LED display unit, and another route USB communication unit or 485 communication units carry out communication with the external world.USB communication unit can be used, when needing can to open 485 communication units when the parameter and temperature value that arrange are read in control room end teletransmission when the temperature value of the parameter needing this locality reading to arrange and measurement.
By key operation unit, the alarming value parameter controlling output unit can be set;Controlling output unit to be connected with the input/output port mouth of CPU element, when reaching the alarming value arranged, the outfan of CPU element changes level state, drives the actuating of relay controlled in output unit.Pick-up output unit is connected by spi bus with CPU element, is converted into 4 ~ 20mA signal of standard, the temperature value that teletransmission Real-time Collection arrives by the integrated V/I conversion chip in pick-up output unit.
The above, it it is only preferred embodiment of the present utility model, being not the restriction that this utility model is made other form, any those skilled in the art are changed possibly also with the technology contents of the disclosure above or are modified as the Equivalent embodiments of equivalent variations.But every without departing from technical solutions of the utility model content, any simple modification, equivalent variations and remodeling above example made according to technical spirit of the present utility model, still fall within the protection domain of technical solutions of the utility model.
Claims (9)
1. the temperature intelligent monitoring device of an oil-filled transformer, it is characterized in that: include RTD sensor, A/D converting unit, CPU element, communication unit and output unit, the outfan of RTD sensor is connected with the input of A/D converting unit, the outfan of A/D converting unit is connected with the input of CPU element, the output port of CPU element is connected with output unit, the input/output port of CPU element is bi-directionally connected with communication unit, it is additionally provided with as RTD sensor, A/D converting unit, CPU element, communication unit and output unit provide the power supply unit of running voltage, it is respectively arranged with isolated location between described power supply unit and communication unit and output unit.
The temperature intelligent monitoring device of oil-filled transformer the most according to claim 1, it is characterised in that: described communication unit includes 485 communication units and USB communication unit, arranges described isolated location between power supply unit and 485 communication units.
The temperature intelligent monitoring device of oil-filled transformer the most according to claim 1, it is characterized in that: described output unit includes control output unit and the pick-up output unit of output 4 ~ 20mA current signal of output switching signal, arranges described isolated location between power supply unit and pick-up output unit.
The temperature intelligent monitoring device of oil-filled transformer the most according to claim 1, it is characterized in that: described power supply unit includes AC/DC converting unit, 220V alternating current power supply connects the input of AC/DC converting unit, and AC/DC converting unit exports 5V DC source and 24V DC source respectively;
5V DC source is connected with the feeder ear of described RTD sensor, A/D converting unit, CPU element and communication unit, and 24V DC source is connected with the feeder ear of described output unit.
The temperature intelligent monitoring device of oil-filled transformer the most according to claim 2, it is characterised in that: being arranged on the isolated location between described power supply unit and 485 communication units is 5VDC/DC isolated location.
The temperature intelligent monitoring device of oil-filled transformer the most according to claim 3, it is characterised in that: being arranged on the isolated location between described power supply unit and pick-up output unit is 24VDC/DC isolated location.
The temperature intelligent monitoring device of oil-filled transformer the most according to claim 1, it is characterized in that: be additionally provided with LED display unit and key operation unit, the output port of described CPU element is connected with LED display unit, and key operation unit is connected with the input port of CPU element.
The temperature intelligent monitoring device of oil-filled transformer the most according to claim 3, it is characterised in that: the described output unit that controls includes relay and for driving the drive circuit of the actuating of relay.
The temperature intelligent monitoring device of oil-filled transformer the most according to claim 1, it is characterised in that: described RTD sensor is arranged on the top of oil tank of transformer.
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CN201620429058.2U CN205748668U (en) | 2016-05-12 | 2016-05-12 | A kind of temperature intelligent monitoring device of oil-filled transformer |
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CN201620429058.2U CN205748668U (en) | 2016-05-12 | 2016-05-12 | A kind of temperature intelligent monitoring device of oil-filled transformer |
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Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN111142427A (en) * | 2019-12-13 | 2020-05-12 | 贵州电网有限责任公司 | Intelligent measurement and control system for oil surface temperature of transformer |
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2016
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Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN111142427A (en) * | 2019-12-13 | 2020-05-12 | 贵州电网有限责任公司 | Intelligent measurement and control system for oil surface temperature of transformer |
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