CN216718523U - Leakage current method high tension switchgear insulating ability on-line monitoring system - Google Patents
Leakage current method high tension switchgear insulating ability on-line monitoring system Download PDFInfo
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- CN216718523U CN216718523U CN202122651770.0U CN202122651770U CN216718523U CN 216718523 U CN216718523 U CN 216718523U CN 202122651770 U CN202122651770 U CN 202122651770U CN 216718523 U CN216718523 U CN 216718523U
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- 238000012544 monitoring process Methods 0.000 title claims abstract description 22
- 238000000034 method Methods 0.000 title claims abstract description 19
- 238000009413 insulation Methods 0.000 claims abstract description 14
- 238000006243 chemical reaction Methods 0.000 claims abstract description 13
- 238000004891 communication Methods 0.000 claims abstract description 13
- 238000012360 testing method Methods 0.000 abstract description 10
- 230000005540 biological transmission Effects 0.000 description 5
- 230000003449 preventive effect Effects 0.000 description 4
- 238000011161 development Methods 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 3
- 238000004364 calculation method Methods 0.000 description 2
- 238000012423 maintenance Methods 0.000 description 2
- 230000008439 repair process Effects 0.000 description 2
- 230000002159 abnormal effect Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
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Abstract
A leakage current method high-voltage switch cabinet insulation capacity on-line monitoring system belongs to the technical field of high-voltage switch cabinet insulation capacity on-line monitoring, wherein a signal output end of a leakage current sensor is electrically connected with a signal input end of a signal conversion unit, and a signal output end of the signal conversion unit is electrically connected with a leakage current signal input end of a DSP. The control signal output end of the control button array is electrically connected with the intermediate relay array in sequence, and the signal output end of the intermediate relay array is electrically connected with the control signal input end of the DSP in sequence. And the data input end of the communication module is electrically connected with the fault data output end of the DSP, and the data output end of the communication module is electrically connected with the fault signal input end of the relay protection device. The DSP is also electrically connected with the display module, the reset module and the alarm module. Simple structure, good stability and high testing precision.
Description
Technical Field
The utility model belongs to the technical field of on-line monitoring of the insulating capability of a high-voltage switch cabinet, and particularly relates to an on-line monitoring system of the insulating capability of the high-voltage switch cabinet by a leakage current method, which lays a foundation for the intelligent technical development of the high-voltage switch cabinet.
Background
With the rapid development of economy, the demand and the degree of dependence on power resources are increasing, and people gradually realize that the daily production and life are seriously affected by preventive maintenance and fault repair due to regular power failure. In the daily maintenance and repair process, the live monitoring technology is gradually explored, and the online real-time monitoring method of the main operation parameters is researched. The electrified monitoring not only can timely discover the defects of the equipment and avoid the expansion of accidents, but also can reflect the real running state of the equipment compared with the power failure detection.
The high-voltage switch cabinet is an important device in a power transmission and distribution system, and the safety of the high-voltage switch cabinet is directly related to the safety of a power system and power equipment. The insulation capability is a main test for inspecting the insulation level of the high-voltage switch cabinet, a preventive test method is adopted for evaluating the insulation capability of the conventional high-voltage switch cabinet, and the insulation state of equipment under the operating voltage and the operating condition of the whole system cannot be truly reflected due to the fact that the voltage of the preventive test is too low. The high-voltage switch cabinet operation process can not be applied with test voltage, and the existing preventive test insulation test means can not be applied in the high-voltage switch cabinet operation process. Therefore, a new technology is needed to be adopted to carry out on-line monitoring on the insulation characteristic of the high-voltage switch cabinet, alarm is carried out when the insulation is abnormal, further expansion of accidents is avoided, and safe operation of a power system and power equipment is ensured.
SUMMERY OF THE UTILITY MODEL
The utility model aims to provide an online monitoring system for the insulating capability of a high-voltage switch cabinet by a leakage current method, which has the advantages of simple structure, good stability and high test precision.
The technical scheme is as follows:
the leakage current method high-voltage switch cabinet insulating ability on-line monitoring system comprises a DSP, a leakage current sensor, a signal conversion unit, a control button array, an intermediate relay array, a relay protection device and a communication module.
The technical key points are as follows:
the signal output end of the leakage current sensor is electrically connected with the signal input end of the signal conversion unit, and the signal output end of the signal conversion unit is electrically connected with the leakage current signal input end of the DSP. The control signal output end of the control button array is electrically connected with the intermediate relay array in sequence, and the signal output end of the intermediate relay array is electrically connected with the control signal input end of the DSP in sequence. And the data input end of the communication module is electrically connected with the fault data output end of the DSP, and the data output end of the communication module is electrically connected with the fault signal input end of the relay protection device.
And the display signal output end of the DSP is electrically connected with the signal input end of the display module.
The reset signal input end of the DSP is electrically connected with the signal output end of the reset module.
The alarm signal output end of the DSP is electrically connected with the signal input end of the alarm module.
The advantages are that:
the leakage current method high tension switchgear insulating ability on-line monitoring system is simple in structure, good in stability and high in test precision, can realize on-line monitoring of the insulating ability of the high tension switchgear, improves reliability and safety of the high tension switchgear, and lays a foundation for intelligent electrical appliance technology development.
Drawings
Fig. 1 is a schematic circuit diagram of the present invention.
Fig. 2 is a flow chart describing the working process.
Detailed Description
The leakage current method high-voltage switch cabinet insulating ability on-line monitoring system comprises a DSP (digital signal processor), a leakage current sensor, a signal conversion unit, a control button array, an intermediate relay array, a relay protection device, a communication module, a display module, a reset module and an alarm module.
The testing part of the leakage current sensor is mechanically connected with the leakage current testing end of the high-voltage switch cabinet, the signal output end of the leakage current sensor is electrically connected with the signal input end of the signal conversion unit, and the signal output end of the signal conversion unit is electrically connected with the leakage current signal input end of the DSP. The control signal output end of the control button array is electrically connected with the intermediate relay array in sequence, and the signal output end of the intermediate relay array is electrically connected with the control signal input end of the DSP in sequence. And the data input end of the communication module is electrically connected with the fault data output end of the DSP, and the data output end of the communication module is electrically connected with the fault signal input end of the relay protection device.
The display signal output end of the DSP is electrically connected with the signal input end of the display module, the signal output end of the reset module is electrically connected with the reset signal input end of the DSP, and the signal input end of the alarm module is electrically connected with the alarm signal output end of the DSP.
Available models of DSP are: TMS320F 2812.
The system is started by a hardware control button array, the software executes acquisition and transmission all the time, and the hardware control button array controls the acquisition to stop.
The working process of the leakage current method high-voltage switch cabinet insulation capacity on-line monitoring system is described as follows:
(1) and (4) initializing the system, and waiting for monitoring control instructions (waiting for the operation of the control key array and the intermediate relay array) by the DSP.
(2) The leakage current sensor data is read, and leakage current data calculation (parameter calculation) is performed.
(3) And judging whether the leakage current value exceeds a set value, if the leakage current value exceeds the set value, performing fault alarm and data transmission, and if the leakage current value does not exceed the set value, performing data transmission (the data transmission uses a communication module).
(4) And (3) repeatedly executing the step (2).
The communication module is connected to pins 87 and 89 of the DSP.
The display module is connected to pins 92 and 93 of the DSP.
The relay array is connected to pins 106, 107 and 109 of the DSP.
The reset module is connected to pin 160 of the DSP.
The signal conversion unit is connected to pin 172 of the DSP.
The alarm module is connected to pin 94 of the DSP.
The 0-5V voltage signal output by the leakage current sensor (the range is 0-5A) is changed into a 0-3.3V voltage signal through the signal conversion unit and then is sent to the DSP, and the DSP calculates leakage current data according to the proportional relation (I = 1.5U, wherein I is the leakage current value, and U is the DSP receiving voltage value) between the range of the leakage current sensor and the receiving voltage signal.
Claims (5)
1. Leakage current method high tension switchgear insulating ability on-line monitoring system, including DSP, leakage current sensor, signal conversion unit, control button array, auxiliary relay array, relay protection device and communication module, its characterized in that:
the signal output end of the leakage current sensor is electrically connected with the signal input end of the signal conversion unit, and the signal output end of the signal conversion unit is electrically connected with the leakage current signal input end of the DSP; the control signal output end of the control button array is electrically connected with the intermediate relay array in sequence, and the signal output end of the intermediate relay array is electrically connected with the control signal input end of the DSP in sequence; and the data input end of the communication module is electrically connected with the fault data output end of the DSP, and the data output end of the communication module is electrically connected with the fault signal input end of the relay protection device.
2. The leakage current method high-voltage switch cabinet insulation capacity on-line monitoring system according to claim 1, characterized in that:
and the display signal output end of the DSP is electrically connected with the signal input end of the display module.
3. The leakage current method high-voltage switch cabinet insulation capacity on-line monitoring system according to claim 1, characterized in that:
the reset signal input end of the DSP is electrically connected with the signal output end of the reset module.
4. The leakage current method high-voltage switch cabinet insulation capacity on-line monitoring system according to claim 1, characterized in that:
the alarm signal output end of the DSP is electrically connected with the signal input end of the alarm module.
5. The leakage current method high-voltage switch cabinet insulation capacity on-line monitoring system according to claim 1, characterized in that:
the model of the DSP is as follows: TMS320F 2812.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122651770.0U CN216718523U (en) | 2021-11-02 | 2021-11-02 | Leakage current method high tension switchgear insulating ability on-line monitoring system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122651770.0U CN216718523U (en) | 2021-11-02 | 2021-11-02 | Leakage current method high tension switchgear insulating ability on-line monitoring system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN216718523U true CN216718523U (en) | 2022-06-10 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202122651770.0U Active CN216718523U (en) | 2021-11-02 | 2021-11-02 | Leakage current method high tension switchgear insulating ability on-line monitoring system |
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| Country | Link |
|---|---|
| CN (1) | CN216718523U (en) |
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2021
- 2021-11-02 CN CN202122651770.0U patent/CN216718523U/en active Active
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| TR01 | Transfer of patent right |
Effective date of registration: 20240422 Address after: 110027, No. 12, No. 3, development road, Shenyang economic and Technological Development Zone, Shenyang, Liaoning Patentee after: SHENYANG HAOCEN ELECTRIC CO.,LTD. Country or region after: China Patentee after: Shenyang Research Institute Co.,Ltd. Address before: 110027 No. 3-6, 12a, Kaifa Road, Shenyang Economic and Technological Development Zone, Liaoning Province Patentee before: Shenyang Haocheng Electric Technology Co.,Ltd. Country or region before: China Patentee before: Shenyang Research Institute Co.,Ltd. |