CN210665649U - Transformer oil chromatogram on-line monitoring system - Google Patents
Transformer oil chromatogram on-line monitoring system Download PDFInfo
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- CN210665649U CN210665649U CN201920922740.9U CN201920922740U CN210665649U CN 210665649 U CN210665649 U CN 210665649U CN 201920922740 U CN201920922740 U CN 201920922740U CN 210665649 U CN210665649 U CN 210665649U
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Abstract
The utility model relates to a transformer oil chromatogram technical field just discloses a transformer oil chromatogram on-line monitoring system, including terminal cabinet, control panel, host computer control screen, leading circuit function, timer, communication circuit function, DSP control chip and sample control circuit function, the switch port of terminal cabinet and the surface connection of control panel, the inside of terminal cabinet is connected with the base of leading circuit function, timer, communication circuit function, DSP control chip and sample control circuit function respectively, the inner wall of control panel and the surface connection of host computer control screen. The utility model provides a transformer operation condition's tradition method of prejudging mainly adopt transformer oil sample to carry out the method that the chromatogram chemical examination detected, this kind of mode cycle length, the real-time is poor, and the manual work carries out a series of operations, can bring certain operational error's problem.
Description
Technical Field
The utility model relates to a transformer oil chromatogram technical field specifically is a transformer oil chromatogram on-line monitoring system.
Background
The traditional method for prejudging the running condition of the transformer mainly adopts a method for carrying out chromatography assay detection by sampling transformer oil, the mode is long in period and poor in real-time performance, and certain operation errors can be caused by carrying out a series of manual operations. Therefore, in order to ensure the implementation of monitoring latent faults of the transformer, the development and research of a real-time online monitoring and diagnosing system of the transformer chromatogram is an inevitable trend, an online monitoring technology is adopted, a monitoring period can be manually set according to the running state of the transformer, an online monitoring device is used for automatically monitoring fault characteristic gas dissolved in transformer oil, latent faults inside the transformer can be timely found, particularly the capability of capturing the sudden faults of the transformer cannot be achieved by offline chromatographic analysis of the transformer, in addition, data extracted by the online monitoring device can also be used for analyzing and judging the latent faults of the transformer, the defects of the traditional monitoring mode are overcome, aiming at the characteristics of the online monitoring system of the transformer oil chromatogram, the existing control system applied to online monitoring generally adopts a separation type control mode, namely a centralized control cabinet is arranged on the main transformer side, the master control room is provided with a control screen and completes transmission of data signals between the master control room and the master control room, and the master-slave control system consists of a host control screen of the master control room and a control terminal cabinet of the high-voltage switch field transformer and completes control operation of the whole set of on-line monitoring system, uploading of background data information and the like.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to provide a transformer oil chromatogram on-line monitoring system reaches and guarantees that the sensor detects the gaseous volume transmission and becomes the voltage signal accuracy, and when sensor acquisition data carried out the AD conversion, conversion precision reached 3mV, when system self-checking detected device part trouble, but automatic alarm uploaded to host computer control screen, when communication transmission distance exceeded 100m, communication correct rate > 90% purpose.
In order to achieve the above object, the utility model provides a following technical scheme: the utility model provides a transformer oil chromatogram on-line monitoring system, includes terminal cabinet, control panel, host computer control screen, leading circuit function, timer, communication circuit function, DSP control chip and sample control circuit function, the switch port of terminal cabinet is connected with the surface of control panel, the inside of terminal cabinet is connected with the base of leading circuit function, timer, communication circuit function, DSP control chip and sample control circuit function respectively, the inner wall of control panel and the surface connection of host computer control screen, the output of host computer control screen is connected with the input of leading circuit function, timer, communication circuit function, DSP control chip and sample control circuit function respectively, and the output of timer is connected with DSP control chip's input.
Preferably, the function of the front-end circuit comprises a sensor gas detection, a measuring bridge, a filter circuit, a signal amplifier and an a/D conversion module, wherein the output end of the sensor gas detection is connected with the input end of the measuring bridge, the output end of the measuring bridge is connected with the input end of the filter circuit, the output end of the filter circuit is connected with the input end of the signal amplifier, and the output end of the signal amplifier is connected with the input end of the a/D conversion module.
Preferably, the communication circuit function includes a communication module and an isolation module, and an output end of the isolation module is connected with an input end of the communication module.
Preferably, the sampling control circuit comprises a motor control circuit, a direct current motor and a six-way valve, wherein the output end of the motor control circuit is connected with the input end of the direct current motor, and the output end of the direct current motor is connected with the input end of the six-way valve.
Preferably, the output end of the a/D conversion module is connected with the input end of the DSP control chip.
Preferably, the output end of the DSP control chip is connected to the input ends of the isolation module and the motor control circuit, respectively.
The utility model provides a transformer oil chromatogram on-line monitoring system. The method has the following beneficial effects:
(1) after the control system starts the detection function, the system firstly starts self-checking to check whether the working state of each part is good or not, and mainly relates to each integrated circuit, a sensor and the like, if abnormity is found, the system can alarm through the host control screen to remind a worker to check the instrument, if abnormity occurs in the monitoring work after the later operation, the system can also alarm at any time and transmit information to the host control screen, the accurate control system completes the gas taking function and sends sample gas into the sensor for gas detection, a six-way valve is adopted for gas taking, as shown in figure 3, the control system needs to drive the six-way valve to rotate by controlling a direct current motor, the collection of the system to the gas is completed by designing proper gas taking time, wherein a DSP control chip sends out a control instruction, the time delay is set through a timer, and the time delay period is the duration of a conversion period, before the detection is started, the six-way valve is positioned at the left side position in the graph 3, when the detection is started, the six-way valve is controlled by the direct current motor to be rotated to the right side position to start gas detection, after the detection is finished, the six-way valve is rotated to the left side position again, a corresponding time delay function needs to be set in the whole period to finish the gas detection, the accuracy of the quantity and the voltage signal of the gas detected by the sensor is ensured, when the sensor collects data and performs A/D conversion, the conversion precision reaches 3mV, when the system self-detection detects that a device part has a fault, the data can be automatically reported to a host control screen in an alarm mode, and when the communication transmission distance exceeds 100m, the communication accuracy.
(2) The utility model discloses a select suitable control chip as control core CPU, accomplish the programming control requirement to whole control system, can adopt DSP, it has higher precision to require it, and from taking integrated AD conversion interface, suitable IO mouth, but have programmable and erasable program memory function, make full use of its inside program memory and random access memory when the operation storage, need not connect external memory, can adjust to zero output state through the measurement electric bridge of design autozero circuit with the sensor, accessible stabiliser and DSP control chip realize the control to the numerical control potentiometre, control the trigger end of numerical control potentiometre through stabiliser output steady voltage, lead to DSP pin output and adjust the numerical control potentiometre, make it have more subtle zero setting ability.
Drawings
Fig. 1 is a front view of the present invention;
FIG. 2 is a block diagram of the present invention;
fig. 3 is an operation diagram of the six-way valve of the present invention.
In the figure: the system comprises a terminal cabinet 1, a control panel 2, a host computer control screen 3, a front-end circuit function 4, a timer 5, a communication circuit function 6, a DSP control chip 7, a sampling control circuit function 8, a sensor gas detection 401, a measuring bridge 402, a filter circuit 403, a signal amplifier 404, an A/D conversion module 405, a communication module 601, an isolation module 602, a motor control circuit 801, a DC motor 802 and a six-way valve 803.
Detailed Description
As shown in fig. 1-3, the utility model provides a technical solution: a transformer oil chromatogram on-line monitoring system comprises a terminal cabinet 1, a control panel 2, a host control screen 3, a front-end circuit function 4, a timer 5, a communication circuit function 6, a DSP control chip 7 and a sampling control circuit function 8, wherein a switch port of the terminal cabinet 1 is movably connected with the outer surface of the control panel 2, the interior of the terminal cabinet 1 is respectively connected with the front-end circuit function 4, timer 5, communication circuit function 6, DSP control chip 7 and sample control circuit function 8's base fixed connection, the inner wall of control panel 2 and the outer fixed surface of host computer control screen 3 are connected, host computer control screen 3's output respectively with leading circuit function 4, timer 5, communication circuit function 6, DSP control chip 7 and sample control circuit function 8's input telecommunications connection, timer 5's output and DSP control chip 7's input telecommunications connection.
Further, the front-end circuit function 4 comprises a sensor gas detection 401, a measuring bridge 402, a filter circuit 403, a signal amplifier 404 and an a/D conversion module 405, the output of the sensor gas detection 401 being communicatively connected to the input of the measuring bridge 402, the output of the measuring bridge 402 being communicatively connected to the input of the filter circuit 403, the output of the filter circuit 403 being communicatively connected to the input of the signal amplifier 404, the output of the signal amplifier 404 being communicatively connected to the input of the a/D conversion module 405.
Further, the communication circuit function 6 comprises a communication module 601 and an isolation module 602, an output of the isolation module 602 being in telecommunication connection with an input of the communication module 601.
Further, the sampling control circuit function 8 includes a motor control circuit 801, a dc motor 802, and a six-way valve 803, wherein an output terminal of the motor control circuit 801 is electrically connected to an input terminal of the dc motor 802, and an output terminal of the dc motor 802 is electrically connected to an input terminal of the six-way valve 803.
Further, an output terminal of the a/D conversion module 405 is connected to an input terminal of the DSP control chip 7 in telecommunication.
Further, the output terminal of the DSP control chip 7 is electrically connected to the isolation module 602 and the input terminal of the motor control circuit 801, respectively.
When in use, after the control system starts the detection function, firstly the system should start self-checking to check whether the working state of each part is good, mainly relating to each integrated circuit, sensor and the like, if abnormity is found, the system can alarm through the host control screen 3 to remind a worker to check the instrument, if abnormity occurs in the monitoring work after the later operation, the system can alarm at any time and transmit information to the host control screen 3, the accurate control system completes the gas taking function, the sample gas is sent to the sensor gas detection 401 to be detected, for gas taking, a six-way valve 803 is adopted, as shown in figure 3, the control system needs to control a direct current motor 802 to drive the six-way valve 803 to rotate, and the gas taking of the system is completed by designing proper gas taking time, wherein a DSP control chip 7 sends out a control instruction, and the time delay is set through a timer 5, and the time delay period is the duration of a conversion period, before the detection is started, the six-way valve 803 is at the left position in fig. 3, when the detection is started, the six-way valve 803 is controlled by the direct current motor 802 to be turned to the right position to start gas detection, after the detection is finished, the six-way valve is turned to the left position again, the whole period needs to be set with a corresponding time delay function to finish gas detection, the programming control requirement on the whole control system is finished by selecting a proper control chip as a control core CPU, a DSP can be adopted to require high precision, an integrated a/D conversion interface and a proper I/O port are provided, the six-way valve has the function of a programmable erasable program memory, the internal program memory and a random memory are fully utilized during operation and storage, an external memory is not needed, the measuring bridge 402 of the sensor can be adjusted to a zero output state by designing an automatic zero setting circuit, and the control of the numerical control potentiometer can be realized by a voltage stabilizer and the DSP control chip, the trigger end of the numerical control potentiometer is controlled by outputting a stable voltage through the voltage stabilizer, and the numerical control potentiometer is adjusted through the output of the DSP pin, so that the numerical control potentiometer has finer zero setting capability.
To sum up, the utility model discloses a after control system starts the detection function, at first the system should begin the self-checking, check whether the operating condition of each part is good, mainly relate to each integrated circuit, sensor etc. if discover unusual can report to the police through host computer control screen 3 in order to remind the staff to inspect the instrument, in the monitoring work after putting into operation later on if unusual also can report to the police at any time and transmit information to host computer control screen 3, accurate control system accomplishes the function of getting gas, send sample gas into sensor gas detection 401 and detect, plan to adopt six-way valve 803 to get gas, as shown in figure 3, control system needs to drive six-way valve 803 through control direct current motor 802 and rotate, through designing suitable time of getting gas, accomplish the collection of system to gas, wherein send control command by DSP control chip 7, and set time delay through timer 5, the time delay period is the duration of a conversion period, before the detection is started, the six-way valve 803 is positioned at the left side position in fig. 3, when the detection is started, the six-way valve 803 is controlled by the direct current motor 802 to be switched to the right side position to start gas detection, after the detection is finished, the six-way valve is switched to the left side position again, the whole period needs to be set with a corresponding time delay function to finish gas detection, the purpose of ensuring the accuracy of the quantity transmission of the gas detected by the sensor to be converted into voltage signals is achieved, when the data collected by the sensor is subjected to A/D conversion, the conversion accuracy reaches 3mV, when the system self-detection detects the failure of a device part, the automatic alarm can be sent to a host control screen, when the communication transmission distance exceeds 100m, the communication accuracy is more than 90 percent, the utility model selects a proper control chip as a control core CPU to finish the programming control requirement of the whole control system, the digital control potentiometer is controlled by a voltage stabilizer and a DSP control chip 7, a stable voltage is output by the voltage stabilizer to control a trigger end of the digital control potentiometer, and the digital control potentiometer is regulated by the output of a DSP pin, so that the digital control potentiometer has finer zero-setting capability.
Claims (6)
1. The utility model provides a transformer oil chromatogram on-line monitoring system, includes terminal cabinet (1), control panel (2), host computer control panel (3), leading circuit function (4), timer (5), communication circuit function (6), DSP control chip (7) and sample control circuit function (8), its characterized in that: the switch port of terminal cabinet (1) is connected with the surface of control panel (2), the inside of terminal cabinet (1) is connected with the base of leading circuit function (4), timer (5), communication circuit function (6), DSP control chip (7) and sample control circuit function (8) respectively, the inner wall of control panel (2) is connected with the surface of host computer control screen (3), the output of host computer control screen (3) is connected with the input of leading circuit function (4), timer (5), communication circuit function (6), DSP control chip (7) and sample control circuit function (8) respectively, and the output of timer (5) is connected with the input of DSP control chip (7).
2. The transformer oil chromatographic on-line monitoring system according to claim 1, characterized in that: the pre-circuit function (4) comprises a sensor gas detection circuit (401), a measuring bridge (402), a filter circuit (403), a signal amplifier (404) and an A/D conversion module (405), wherein the output end of the sensor gas detection circuit (401) is connected with the input end of the measuring bridge (402), the output end of the measuring bridge (402) is connected with the input end of the filter circuit (403), the output end of the filter circuit (403) is connected with the input end of the signal amplifier (404), and the output end of the signal amplifier (404) is connected with the input end of the A/D conversion module (405).
3. The transformer oil chromatographic on-line monitoring system according to claim 1, characterized in that: the communication circuit function (6) comprises a communication module (601) and an isolation module (602), the output of the isolation module (602) being connected to the input of the communication module (601).
4. The transformer oil chromatographic on-line monitoring system according to claim 1, characterized in that: the sampling control circuit function (8) comprises a motor control circuit (801), a direct current motor (802) and a six-way valve (803), the output end of the motor control circuit (801) is connected with the input end of the direct current motor (802), and the output end of the direct current motor (802) is connected with the input end of the six-way valve (803).
5. The transformer oil chromatographic on-line monitoring system according to claim 2, characterized in that: and the output end of the A/D conversion module (405) is connected with the input end of the DSP control chip (7).
6. The transformer oil chromatographic on-line monitoring system according to claim 3, characterized in that: and the output end of the DSP control chip (7) is respectively connected with the input ends of the isolation module (602) and the motor control circuit (801).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920922740.9U CN210665649U (en) | 2019-06-19 | 2019-06-19 | Transformer oil chromatogram on-line monitoring system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920922740.9U CN210665649U (en) | 2019-06-19 | 2019-06-19 | Transformer oil chromatogram on-line monitoring system |
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| Publication Number | Publication Date |
|---|---|
| CN210665649U true CN210665649U (en) | 2020-06-02 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201920922740.9U Active CN210665649U (en) | 2019-06-19 | 2019-06-19 | Transformer oil chromatogram on-line monitoring system |
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| Country | Link |
|---|---|
| CN (1) | CN210665649U (en) |
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- 2019-06-19 CN CN201920922740.9U patent/CN210665649U/en active Active
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