CN210867284U - Intelligent grounding box device of high-voltage cable - Google Patents
Intelligent grounding box device of high-voltage cable Download PDFInfo
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- CN210867284U CN210867284U CN201921315434.5U CN201921315434U CN210867284U CN 210867284 U CN210867284 U CN 210867284U CN 201921315434 U CN201921315434 U CN 201921315434U CN 210867284 U CN210867284 U CN 210867284U
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Abstract
The utility model relates to a power cable's safe operation monitoring field, concretely relates to high tension cable's intelligent ground connection case device. By integrating various on-line monitoring means and diversified power supply technologies, the effectiveness of on-line monitoring of the power cable is effectively improved, the power cable can adapt to various application environments, the purpose of guaranteeing safe operation of the high-voltage cable is achieved, signals such as environment temperature, cable circulation, cable partial discharge and grounding box anti-theft are effectively monitored through corresponding circuits, multi-dimensional monitoring of the high-voltage cable is achieved, and the safety anti-theft performance of the grounding box is improved. The system comprises a power supply unit, a signal acquisition and processing unit and a client terminal information processing unit. The power supply unit comprises a mains supply conversion circuit and a photovoltaic energy storage circuit. The signal acquisition and processing unit comprises an environment and cable temperature signal acquisition and processing circuit, a circulating current signal acquisition and processing circuit, a partial discharge signal acquisition and processing circuit and an anti-theft signal acquisition and processing circuit. The client terminal information processing unit comprises a GPRS or optical fiber transmission data processing circuit.
Description
Technical Field
The utility model relates to a power cable's safe operation monitoring field, concretely relates to high tension cable's intelligent ground connection case device.
Background
Since the new century, with the rapid development of Chinese economy, the application of high-voltage power cables as key equipment in urban power grids is rapidly prolonged, but how to collect the running state of the high-voltage cables by using an online monitoring technology to ensure the safe and reliable running of the high-voltage cables is a difficult problem faced by high-voltage cable transmission lines.
In order to ensure safe and reliable operation of a power transmission line, a cable grounding box is generally adopted for online monitoring and protection of cables, the current high-voltage power cable monitoring technology is applied a lot, but the current power cable grounding box cannot meet the requirements of online monitoring application in various environments and multiple dimensions.
Disclosure of Invention
The utility model aims at providing a modularization intelligence ground connection box device through integrated various on-line monitoring means and diversified power supply technology to effectively improve power cable's on-line monitoring's validity, and make it can adapt to various application environment, in order to reach the purpose of guarantee high tension cable safe operation.
In order to overcome the technical defects of the conventional grounding box, the invention provides the following technical scheme:
the utility model discloses a modularization intelligence grounding box device, including power supply unit, signal acquisition and processing unit, customer terminal information processing unit, wherein the power supply unit includes commercial power conversion circuit, photovoltaic energy storage circuit, and signal acquisition and processing unit includes environment and cable temperature signal acquisition processing circuit, circulation signal acquisition processing circuit, partial discharge signal acquisition processing circuit, theftproof signal acquisition processing circuit, and customer terminal information processing unit includes GPRS or optical fiber transmission data processing circuit.
The commercial power conversion circuit in the power supply unit comprises an AC-DC power module, the photovoltaic energy storage circuit comprises a photovoltaic panel, a photovoltaic controller and an energy storage battery, and the commercial power conversion circuit and the photovoltaic energy storage circuit are connected to a rear-stage circuit through a semiconductor switch for use.
The environment and cable temperature signal acquisition processing circuit in the signal acquisition and processing unit contains temperature sensor and processing unit, temperature sensor sets up inside the ground connection case and ground connection cable position and is used for monitoring inside temperature and ground connection cable temperature, temperature sensor and processing unit are connected, transmit to microprocessor through gathering the conditioning circuit and handle, and the temperature parameter T of gathering carries out the comparison with a certain setting value TS, if T is greater than TS, then starts the fan in the ground connection case and cools down to in time report temperature data. If T is still larger than TS in continuous NT sampling periods, reporting is continued until T is smaller than TS.
The circulating current signal acquisition and processing circuit in the signal acquisition and processing unit converts a current signal acquired by the low-frequency sensor into a voltage signal U1, the voltage signal U1 is transmitted to the microprocessor for processing through signal conditioning, an acquired current parameter A is compared with a certain set value AS, circulating current data are reported in time if A is larger than AS, and if A is still larger than AS within continuous NA sampling periods, the circulating current data are continuously reported until A is smaller than AS.
The partial discharge signal acquisition processing circuit in the signal acquisition and processing unit converts a current signal acquired by the high-frequency sensor into a voltage signal U2, the voltage signal U2 is conditioned and transmitted to the microprocessor for processing, the phase of the acquired voltage signal U4 is compared and judged with the phase of a synchronous voltage UT signal, a partial discharge signal is obtained by combining the pulse amplitude of the voltage signal U4, and the partial discharge signal is reported in time.
The anti-theft signal acquisition and processing circuit in the signal acquisition and processing unit transmits a voltage signal U3 acquired by the anti-theft sensor to the microprocessor for processing through signal conditioning, the acquired voltage signal U5 is compared with a certain set value US, if U5 is larger than US, the grounding box is judged to have an anti-theft phenomenon, and the grounding box is reported in time.
The signal acquisition processing is to amplify, filter, translate, detect and the like the signal, and comprises a first-stage operational amplifier, a second-stage operational amplifier, an optical coupling isolation operational amplifier, a third-stage operational amplifier and a fourth-stage operational amplifier.
The client terminal information processing unit comprises an optical fiber transceiving communication interface circuit, a GPRS transceiving interface circuit, a communication software platform and a special software platform, and transmits the received data to a client server system and displays the data graphically.
The input of the first-stage operational amplifier is a voltage signal of a preceding-stage acquisition unit sensor.
And the input of the optical coupling isolation amplifier is connected with the output of the first-stage operational amplifier.
And the input of the second-stage operational amplifier is connected with the output of the optical coupling isolation amplifier.
And the input of the third-stage operational amplifier is connected with the output of the second-stage filter circuit.
And the input of the fourth-stage operational amplifier is connected with the output of the third-stage operational amplifier.
And the output of the fourth-stage operational amplifier is connected with the microprocessor.
The temperature sensor is PT 10.
The first-stage operational amplifier, the second-stage operational amplifier, the third-stage operational amplifier and the fourth-stage operational amplifier are OP2177, the isolation amplifier is HCNR201, and the microprocessor is EP3C5 of CycloneiI.
The utility model discloses a high tension cable intelligence ground connection case device set forth puts, ground connection case theftproof signal such as carries out effectual monitoring through corresponding circuit to ambient temperature, cable circulation, cable office, has realized high tension cable's multidimension degree monitoring to the safety theftproof performance of ground connection case has been improved.
Drawings
For more clear explanation of the technical solution of the present invention, the technical solution is briefly introduced with reference to the following drawings.
Fig. 1 is the utility model provides a technical scheme system frame schematic diagram of intelligence ground connection case.
Fig. 2 is a schematic diagram of a circuit of a commercial power AC-DC power supply unit provided by the present invention.
Fig. 3 is a schematic diagram of an environment and cable temperature monitoring circuit provided by the present invention.
Fig. 4 is a schematic diagram of a circulation monitoring circuit provided by the present invention.
Fig. 5 is a schematic diagram of a partial discharge monitoring circuit provided by the present invention.
Fig. 6 is a schematic diagram of an anti-theft monitoring circuit provided by the present invention.
Fig. 7 is a schematic block diagram of an optical fiber transceiver circuit provided by the present invention.
Detailed Description
The technical solution of the present invention will be described in detail with reference to the accompanying drawings.
The utility model discloses an implementation case provides a high tension cable intelligence ground connection case device system frame sketch map, and the device includes power supply unit circuit 1, signal sampling processing unit circuit 2, customer terminal information processing unit circuit 3 and microcontroller 4, wherein signal sampling processing unit circuit contains environment and cable temperature signal acquisition processing circuit 2-1, circulation signal acquisition processing circuit-2-2 partial discharge signal acquisition processing circuit 2-3, theftproof signal acquisition processing circuit 2-4; the power supply unit circuit 1, the signal sampling processing unit circuit 2 and the client terminal information processing unit circuit 3 are all connected with the micro-processor 4 and used for monitoring an environment temperature signal, a cable temperature signal, a partial discharge signal, a circulation signal and an anti-theft signal, the micro-controller 4 is connected with a client terminal host through an optical fiber or a GPRS circuit and displays various graphical interfaces and waveform interfaces in real time, multi-dimensional monitoring is carried out on a high-voltage cable, meanwhile, the anti-theft circuit can guarantee the safety of the intelligent grounding box device, and the following is detailed description of each circuit.
The utility model provides a schematic diagram of commercial power AC-DC circuit, it can be seen from the figure that commercial power AC-DC circuit adopts the H bridge circuit, reaches the power supply target.
The utility model provides a schematic diagram of temperature monitoring circuit. It can be seen from the figure that the temperature monitoring circuit comprises a temperature sensor and a conversion processing unit, wherein the conversion processing unit comprises a first-stage operational amplifier, a second-stage operational amplifier, an optical coupling isolation amplifier and a third-stage operational amplifier, further, an input end of the first-stage operational amplifier is used for receiving a signal of the temperature sensor, the signal is processed by the first-stage operational amplifier and then is used as an input of the second-stage operational amplifier, the signal is processed by the second-stage operational amplifier and then is input into the third-stage operational amplifier through the optical coupling isolation amplifier and then is connected with a microprocessor, therefore, the principle of the temperature monitoring circuit is to convert the temperature signal change into the voltage signal change, and the monitoring of the environment temperature and the cable temperature is achieved.
The utility model provides a schematic diagram of circulation monitoring circuit. It can be seen from the figure that the circulating current monitoring circuit comprises a low-frequency current sensor and a conversion processing unit, wherein the conversion processing unit comprises a first-stage operational amplifier, a second-stage operational amplifier, a third-stage operational amplifier and a fourth-stage operational amplifier, an input end of the first-stage operational amplifier is used for receiving a signal of the low-frequency current sensor, and the signal is connected with a microprocessor after the emitter following processing of the second-stage operational amplifier, the amplification processing of the third-stage operational amplifier and the detection processing of the fourth-stage operational amplifier, so that the principle of the circulating current monitoring circuit is to convert the current signal change into the voltage signal change, thereby realizing the target of circulating current monitoring.
The utility model provides a schematic diagram of monitoring circuit is put in office, it is visible from the picture, and monitoring circuit is put in office contains high frequency current sensor and conversion processing unit. The conversion processing unit comprises a first-stage operational amplifier, a second-stage operational amplifier, a third-stage operational amplifier and a fourth-stage operational amplifier, wherein the input end of the first-stage operational amplifier is used for receiving signals of the high-frequency current sensor, and the signals are connected with the microprocessor after being subjected to emitter-stage following processing of the second-stage operational amplifier, amplification processing of the third-stage operational amplifier and detection processing of the fourth-stage operational amplifier, so that the principle of the partial discharge monitoring circuit is to convert current signal changes into voltage signal changes, and therefore the partial discharge monitoring target is achieved.
The utility model provides a schematic diagram of theftproof monitoring circuit. As can be seen from the figure, the anti-theft monitoring circuit comprises a vibration sensor and a conversion processing unit. The conversion processing unit comprises a first-stage operational amplifier, a second-stage operational amplifier, a third-stage operational amplifier and a fourth-stage operational amplifier. The input end of the first-stage operational amplifier is used for receiving signals of the vibration sensor, and the signals are connected with the microprocessor after the emitter following processing of the second-stage operational amplifier, the amplifying processing of the third-stage operational amplifier and the wave detection processing of the fourth-stage operational amplifier, so that the principle of the anti-theft monitoring circuit is to convert vibration signal changes into voltage signal changes, and therefore the anti-theft monitoring target is achieved.
The utility model provides a schematic diagram of optical fiber transmission circuit. As can be seen from the figure, the optical fiber transmission circuit adopts HR1521 and HR2521 circuits to realize the transmission and reception of the collected and processed signals.
To sum up, the utility model discloses an intelligence ground connection case device that case provided can carry out effective monitoring through corresponding circuit to temperature signal, circulation signal, partial discharge signal, theftproof signal, has realized high tension cable's multidimension degree monitoring and safe handling under multiple environment.
Claims (9)
1. An intelligent grounding box device of a high-voltage cable is characterized by comprising a power supply unit circuit, a signal acquisition and processing unit circuit, a client terminal information processing unit circuit and a microprocessor, wherein the power supply unit circuit comprises a commercial power 220V conversion circuit and a photovoltaic energy storage circuit, the signal acquisition and processing unit circuit comprises an environment and cable temperature signal acquisition and processing circuit, a circulating current signal acquisition and processing circuit, a partial discharge signal acquisition and processing circuit and an anti-theft signal acquisition and processing circuit, the client terminal information processing unit circuit and the microprocessor comprise GPRS or optical fiber transmission data processing circuits, the front end of the power supply unit circuit is connected with a commercial power 220V alternating current and photovoltaic solar panel, and is connected with the signal acquisition and processing unit circuit, the client terminal information processing unit circuit and a power interface of the microprocessor after passing through the conversion circuit, the signal collecting and processing unit circuit amplifies the received temperature, circulation and partial discharge signals and then connects the amplified signals with the A/D port of the microprocessor, and the client terminal information processing unit circuit is connected with the communication port of the microprocessor through GPRS or optical fiber.
2. The intelligent grounding box device of high-voltage cable as claimed in claim 1, wherein the commercial power 220V conversion circuit in the power supply unit comprises an AC-DC power module, the photovoltaic energy storage circuit comprises a photovoltaic panel, a photovoltaic controller, and an energy storage battery, and the 220V conversion circuit and the photovoltaic energy storage circuit are connected to the rear-stage circuit through a semiconductor switch for use, and are used for supplying power to the rear-stage circuit.
3. The intelligent grounding box device of high-voltage cable as claimed in claim 1, wherein the environment and cable temperature signal acquisition and processing circuit in the signal acquisition and processing unit comprises a temperature sensor and a processing unit, the temperature sensor is arranged in the grounding box and at the grounding cable position for monitoring the internal temperature and the grounding cable temperature, the temperature sensor is connected with the processing unit, the processing unit is connected with the microprocessor through the acquisition and conditioning circuit, the acquired temperature parameter T is compared with a certain set value TS, if T is greater than TS, the fan in the grounding box is started to cool down and report temperature data in time, and if T is still greater than TS in continuous NT sampling periods, the reporting is continued until T is less than TS.
4. The intelligent grounding box device of high-voltage cable AS claimed in claim 1, wherein a loop current signal collecting and processing circuit in the signal collecting and processing unit is modularly disposed inside the grounding box, converts the current signal collected by the low-frequency sensor into a voltage signal U1, the loop current signal collecting and processing circuit is connected to the microprocessor, compares the collected current parameter a with a certain set value AS, if a is greater than AS, reports loop current data in time, and if a is still greater than AS in the continuous NA sampling periods, reports are continued until a is less than AS.
5. The intelligent grounding box device of high-voltage cable as claimed in claim 1, wherein the local discharge signal collecting and processing circuit in the signal collecting and processing unit is disposed inside the grounding box in a modularized manner, converts the current signal collected by the high-frequency sensor into a voltage signal U2, and is connected to the microprocessor, and compares the phases of the collected voltage signal U4 and the synchronous voltage UT signal, and combines the pulse amplitude of the voltage signal U4 to obtain a local discharge signal, and reports the local discharge signal in time.
6. The intelligent grounding box device of high voltage cable as claimed in claim 1, wherein the anti-theft signal collecting and processing circuit of the signal collecting and processing unit is disposed inside the grounding box in a modularized manner, and converts the signal collected by the anti-theft sensor into a voltage signal U3, the anti-theft signal collecting and processing circuit is connected to the microprocessor, the collected voltage signal U5 is compared with a set value US, and if U5 is greater than US, the grounding box is determined to have an anti-theft effect and reported in time.
7. The intelligent grounding box device of high voltage cable as claimed in claim 1, wherein the client terminal information processing unit comprises an optical fiber transceiving communication interface circuit, a GPRS transceiving interface circuit, a communication software platform and a dedicated software platform, and transmits the received data to the client server system and displays the received data graphically.
8. The intelligent grounding box device of high voltage cable as claimed in claim 1, wherein the signal acquisition process is an amplification, filtering, translation, and detection process of signal, and comprises a first operational amplifier, a second operational amplifier, an optical coupling isolation operational amplifier, a third operational amplifier, and a fourth operational amplifier.
9. The intelligent grounding box device of high voltage cable as claimed in claim 8, wherein the input of the first stage operational amplifier is the voltage signal of the pre-stage acquisition unit sensor, the input of the optical coupling isolation amplifier is connected with the output of the first stage operational amplifier, the input of the second stage operational amplifier is connected with the output of the optical coupling isolation amplifier, the input of the third stage operational amplifier is connected with the output of the second stage filter circuit, the output of the third stage operational amplifier is connected with the input of the fourth stage operational amplifier, and the output of the fourth stage operational amplifier is connected with the microprocessor.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921315434.5U CN210867284U (en) | 2019-08-14 | 2019-08-14 | Intelligent grounding box device of high-voltage cable |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921315434.5U CN210867284U (en) | 2019-08-14 | 2019-08-14 | Intelligent grounding box device of high-voltage cable |
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| CN210867284U true CN210867284U (en) | 2020-06-26 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113671306A (en) * | 2021-07-02 | 2021-11-19 | 韩金宝 | High-voltage cable on-line monitoring system |
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2019
- 2019-08-14 CN CN201921315434.5U patent/CN210867284U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113671306A (en) * | 2021-07-02 | 2021-11-19 | 韩金宝 | High-voltage cable on-line monitoring system |
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