CN114397544A - Monitoring system and method for high-voltage cable terminal connector - Google Patents
Monitoring system and method for high-voltage cable terminal connector Download PDFInfo
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- CN114397544A CN114397544A CN202210025126.9A CN202210025126A CN114397544A CN 114397544 A CN114397544 A CN 114397544A CN 202210025126 A CN202210025126 A CN 202210025126A CN 114397544 A CN114397544 A CN 114397544A
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- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims description 24
- 229910052742 iron Inorganic materials 0.000 claims description 12
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- 238000009529 body temperature measurement Methods 0.000 description 3
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- G—PHYSICS
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- 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
- G01R31/12—Testing dielectric strength or breakdown voltage ; Testing or monitoring effectiveness or level of insulation, e.g. of a cable or of an apparatus, for example using partial discharge measurements; Electrostatic testing
- G01R31/1227—Testing dielectric strength or breakdown voltage ; Testing or monitoring effectiveness or level of insulation, e.g. of a cable or of an apparatus, for example using partial discharge measurements; Electrostatic testing of components, parts or materials
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- G05B—CONTROL OR REGULATING SYSTEMS IN GENERAL; FUNCTIONAL ELEMENTS OF SUCH SYSTEMS; MONITORING OR TESTING ARRANGEMENTS FOR SUCH SYSTEMS OR ELEMENTS
- G05B19/00—Programme-control systems
- G05B19/02—Programme-control systems electric
- G05B19/04—Programme control other than numerical control, i.e. in sequence controllers or logic controllers
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- G—PHYSICS
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- G05B2219/00—Program-control systems
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Abstract
The utility model discloses a monitoring system and a method for a high-voltage cable terminal connector; the monitoring system comprises a concentrator, three infrared sensors, three composite CTs, a power acquisition CT and a background server. The monitoring system can automatically acquire partial discharge data, sheath circulation data and temperature data of the cable terminal joint, automatically analyze the data, provide abnormal result alarm, run on line for a long time, and solve the problems that manual regular maintenance is high in cost, safety risks exist, the cable terminal joint cannot be found out in the first time and the like; the staff only need browse the page on the office, can look over whether the terminal joint has partial discharge, whether have the condition of high temperature, only need send the people when the anomaly appear go look over can.
Description
Technical Field
The utility model belongs to the technical field of partial discharge and temperature monitoring of cable terminal connectors, and particularly relates to a monitoring system and method of a high-voltage cable terminal connector.
Background
High-voltage cables are the main mode of urban power supply at present, and in recent years, faults of cable lines are mostly caused by partial discharge of cable joints, on one hand, long-term discharge easily causes cable insulation to be punctured to cause line fault tripping, on the other hand, the cable is easily caused to generate heat locally, and on the other hand, high temperature causes insulation layer decomposition to generate flammable gas to cause fire. The outer metal sheath of the cable is an important component of the cable, when the cable core passes through current, circulation can be generated on the metal sheath, and the abnormal phenomenon of sheath circulation can be caused by poor insulation state, poor grounding, incorrect grounding mode of the metal sheath and the like of the outer sheath, so that the running safety of the cable is seriously threatened.
Generally, due to the strict manufacturing process of the high-voltage cable, faults such as partial discharge and the like are difficult to occur in the cable, most faults occur in a cable terminal connector, the cost of regular manual maintenance is high, faults are not easy to find, a pole needs to be climbed during maintenance, and certain potential safety hazards exist.
Chinese utility model patent (201922120320.1) discloses a transmission line cable joint temperature on-line monitoring system, include: the first temperature monitoring devices are arranged in a cable well of the power transmission line and used for monitoring temperature information of cable joints in the cable well of the power transmission line; the plurality of second temperature monitoring devices are arranged at cable joints on the line of the power transmission line and used for monitoring the temperature information of the cable joints on the line of the power transmission line; the monitoring center is in communication connection with the first temperature monitoring device and the second temperature monitoring device respectively; and the monitoring center acquires the temperature information of the cable joint monitored by the first temperature monitoring device and the second temperature monitoring device in real time. The on-line monitoring system for the temperature of the cable joint of the power transmission line realizes real-time monitoring, replaces the traditional methods of manual monitoring and manual infrared monitoring, and can find the abnormity of the cable joint in time.
The Chinese utility model patent (202022825245.1) provides an intelligent monitoring system for a high-voltage cable channel, which comprises a monitoring device and a remote server, wherein the monitoring device comprises a main control module, the main control module is connected with a 5G module and image acquisition equipment, and the monitoring device is arranged at a preset monitoring point of the cable channel; the monitoring device is communicated with a remote server through a 5G module; the main control module of the monitoring and shooting device is also connected with an infrared thermal imaging temperature measuring device and a cable sheath monitoring device; the system realizes video and image monitoring inside a cable channel, monitoring of the temperature of a cable joint and the running state of the grounding current of a cable sheath based on a 5G technology, and improves the lean management level of high-voltage cables and channels; meanwhile, the temperature of the cable terminal and the grounding problem of the cable sheath are effectively monitored by the infrared thermal imaging temperature measuring device and the cable sheath monitoring device.
The chinese patent application (201910430132.0) provides a cable joint monitoring device and a temperature correction method, including: the infrared temperature measuring sensor is used for carrying out infrared temperature measurement on the cable connector to obtain a temperature signal; the corrector is connected with the infrared temperature measurement sensor and is used for acquiring a temperature signal of the infrared temperature measurement sensor and correcting the temperature signal to obtain a corrected temperature; and the GPRS data acquisition unit is connected with the corrector, is suitable for being connected with the monitoring terminal, and is used for acquiring the correction temperature of the corrector and sending the correction temperature to the monitoring terminal. Through above-mentioned device, can carry out real-time measurement to cubical switchboard cable joint's temperature, and then can real-time supervision cubical switchboard's running state.
Disclosure of Invention
The utility model aims to provide a monitoring system and a monitoring method for a high-voltage cable terminal connector. The monitoring system can automatically acquire partial discharge data, sheath circulation data and temperature data of the cable terminal connector, automatically analyze the data, provide abnormal result alarm, run on line for a long time, and solve the problems that manual regular maintenance is high in cost, safety risks exist, the cable terminal connector cannot be found to be abnormal in the first time and the like.
In order to achieve the above purpose, the utility model provides the following technical scheme:
a monitoring system of a high-voltage cable terminal connector comprises a concentrator, three infrared sensors, three composite CTs, a power-taking CT and a background server;
the concentrator is arranged on an iron tower where the cable terminal connector is located, is used for managing the infrared sensor and the composite sensor which are connected below, collecting data collected by the infrared sensor and the composite sensor and sending the data to the background server; receiving acquisition configuration and sensor configuration from a background server as a 'bridge' for the sensor and the background server;
the infrared sensors are arranged on an iron tower where the cable terminal connectors are located, and the three infrared sensors respectively shoot A, B, C infrared pictures of the three-phase cable terminal connectors;
the composite sensor is arranged on an iron tower where a cable terminal connector is arranged and connected with the composite CT; the composite sensor collects high-frequency current data and power-frequency current data through the composite CT;
the composite CT is designed as an opening and is clamped on a cable cross interconnection line;
the electricity taking CT is designed to be an opening, is arranged on the main bus and is used for providing power supply support for the monitoring system;
the background server is deployed at the cloud or locally according to the requirements, provides a WEB page, configures the concentrator and the sensor, stores and analyzes the reported data, displays the result on the WEB page, and is responsible for communication with the concentrator.
In the utility model, the infrared sensors can shoot infrared photos and obtain the highest temperature value of a shot object, and the three infrared sensors are respectively aligned to A, B, C three-phase terminal connectors during installation; the composite CT can acquire a high-frequency current signal and a power-frequency current signal, the high-frequency current can judge whether the current has partial discharge, the power-frequency current can obtain the actual current of the monitored current, and the three composite CTs are respectively installed on three crossed interconnection cables and are respectively connected to three composite sensors; the power acquisition CT is arranged on the main bus, the acquired current is input into the concentrator to supply power to the concentrator, and meanwhile, the concentrator outputs a power supply to respectively supply power to the infrared sensor and the composite sensor; the infrared sensor is connected with the concentrator through a network cable and uploads the collected infrared photos; the composite sensor is connected with the concentrator through an RS485 bus and uploads the acquired high-frequency current and power-frequency current data; the concentrator sends the collected infrared photos, high-frequency current and power frequency current data to a background server through 4G, and finally, the data can be checked on a PC or a tablet computer by using a browser.
The utility model further discloses that the concentrator adopts an ARM processor and is provided with an Ethernet port, an RS485 interface and a 4G wireless module.
Because the concentrator needs to simultaneously support functions of 4G, Ethernet, RS485 and the like, and the processed service is relatively complex, an ARM platform is selected to operate the Linux system of the ARM version. 3 Ethernet ports are arranged to be respectively connected with 3 infrared sensors, and the concentrator and the infrared sensors directly transmit data. And the RS485 interface is used for communicating with the composite sensor and reading data acquired by the composite sensor. The 4G wireless module is used for being connected with the background server, receiving the configuration information from the background server and sending the acquired data to the background server. The concentrator still possesses the power output function, for composite sensor and infrared sensor provide the power supply, external power supply only need for the concentrator power supply can like this, convenient wiring.
The utility model further discloses that the infrared sensor is an infrared camera, an ARM chip is arranged in the infrared sensor, and an Ethernet port is arranged in the infrared sensor.
In order to realize the photo collection of the infrared camera, the Linux system has an existing related interface, the development is convenient, and the interface for reading the temperature provided by an infrared camera manufacturer is developed based on Linux, so that the infrared sensor also selects an ARM platform. The infrared camera needs to receive a collecting instruction from the concentrator to take a picture, reads the highest temperature value from the picture after the picture taking is finished, sends the highest temperature value to the concentrator, and forwards the highest temperature value to the background server through the concentrator.
The utility model further discloses that the composite sensor adopts STM32 series processors and is provided with an RS485 interface.
The utility model further discloses that the composite CT mainly integrates the CT capable of collecting power frequency current and high-frequency current into a whole.
In order to simplify the installation steps and improve the integration level, the CT capable of collecting power frequency current and high-frequency current is combined into one, called as composite CT, the composite sensor is developed by using an STM32 platform, the collection of the power frequency current and the high-frequency current is enough met, and data can be sent to the concentrator through an RS485 bus
The utility model also provides a monitoring method of the high-voltage cable terminal connector, which adopts the monitoring system to carry out partial discharge and temperature monitoring on the high-voltage cable terminal connector and comprises the following steps:
the installation of a monitoring system comprises the following steps:
11) deploying a background server to a server in a public network environment, and adding and configuring a concentrator, an infrared sensor and a composite sensor;
12) firstly, sequentially installing a concentrator, a composite sensor and an infrared sensor on an iron tower where a cable terminal joint is located; then, the composite sensor is connected with the concentrator by adopting an RS485 bus, and the infrared sensor is connected with the concentrator by adopting a network cable;
13) firstly, connecting a line of the composite CT to the composite sensor, and then installing the composite CT on a cable cross interconnection line;
14) firstly connecting a wire of the power-taking CT to a concentrator, and then installing the power-taking CT on a main bus;
(II) the monitoring system starts to work, and partial discharge and temperature monitoring are carried out on the high-voltage cable terminal connector:
21) the three infrared sensors respectively shoot A, B, C infrared pictures of the three-phase cable terminal connector according to background configuration, and the highest temperature value is read from the infrared pictures shot each time; then sending the shot infrared picture and the corresponding highest temperature value to the concentrator;
22) the composite sensor collects high-frequency current data and power-frequency current data through the composite CT according to background configuration and then sends the data to the concentrator;
23) after the concentrator collects the data sent by the infrared sensor and the composite sensor, the data are transmitted to a background server through 4G wireless communication;
24) after the background server receives the data, whether a partial discharge signal exists in the cable or not and the strength of the discharge signal are obtained through high-frequency current data analysis; analyzing power frequency current data to obtain the magnitude of current passing through the crossed interconnection line, and using the magnitude as a basis for judging whether current abnormity exists in the line; and then displaying the analysis result on a WEB page.
The utility model has the advantages that:
1. the labor inspection cost is reduced, and the safety risk of personnel is reduced. The staff only need browse the WEB page on the office, can look over whether the terminal joint has partial discharge, whether have the condition of high temperature, only need send the people when the anomaly appear go look over can.
2. All-weather online, can discover the abnormality in time. The user can dispose data acquisition's time interval according to the demand, and the system automatic acquisition data is and upload the backstage, and backstage service automatic judgement data is normal, and the characters that show when unusual data appear remind to overhaul when the problem is not serious the very first time.
3. The installation and the deployment are convenient. The power-taking CT is used for supplying power to the whole system installed on site, an external power supply is not needed, 4G is used for transmitting data, and an external network cable is not needed.
Drawings
FIG. 1 is a schematic diagram of the overall system in one embodiment of the utility model.
FIG. 2 is a flow chart of a field installation partial installation in one embodiment of the present invention.
FIG. 3 is a data interaction diagram of the overall system in one embodiment of the utility model.
Detailed Description
The utility model is further illustrated with reference to the following figures and examples.
Example 1:
as shown in fig. 1, a monitoring system for a high-voltage cable terminal connector comprises a concentrator, three infrared sensors, three composite CTs, an electricity-taking CT and a background server;
the concentrator is arranged on an iron tower where the cable terminal connector is located, is used for managing the infrared sensor and the composite sensor which are connected below, collecting data collected by the infrared sensor and the composite sensor and sending the data to the background server; receiving acquisition configuration and sensor configuration from a background server as a 'bridge' for the sensor and the background server;
the infrared sensors are arranged on an iron tower where the cable terminal connectors are located, and the three infrared sensors respectively shoot A, B, C infrared pictures of the three-phase cable terminal connectors;
the composite sensor is arranged on an iron tower where a cable terminal connector is arranged and connected with the composite CT; the composite sensor collects high-frequency current data and power-frequency current data through the composite CT;
the composite CT is designed as an opening and is clamped on a cable cross interconnection line;
the electricity taking CT is designed to be an opening, is arranged on the main bus and is used for providing power supply support for the monitoring system;
the background server is deployed at the cloud or locally according to the requirements, provides a WEB page, configures the concentrator and the sensor, stores and analyzes the reported data, displays the result on the WEB page, and is responsible for communication with the concentrator.
The monitoring system of this embodiment is applied to in production, carries out partial discharge and temperature monitoring to high tension cable terminal connector, specifically includes:
installation of monitoring system (one) (as shown in fig. 2):
11) deploying a background server to a server in a public network environment, and adding and configuring a concentrator, an infrared sensor and a composite sensor;
12) firstly, sequentially installing a concentrator, a composite sensor and an infrared sensor on an iron tower where a cable terminal joint is located; then, the composite sensor is connected with the concentrator by adopting an RS485 bus, and the infrared sensor is connected with the concentrator by adopting a network cable;
13) firstly, connecting a line of the composite CT to the composite sensor, and then installing the composite CT on a cable cross interconnection line;
14) firstly connecting a wire of the power-taking CT to a concentrator, and then installing the power-taking CT on a main bus;
and (II) starting the monitoring system to work, and carrying out partial discharge and temperature monitoring on the high-voltage cable terminal connector (as shown in figure 3):
21) the three infrared sensors respectively shoot A, B, C infrared pictures of the three-phase cable terminal connector according to background configuration, and the highest temperature value is read from the infrared pictures shot each time; then sending the shot infrared picture and the corresponding highest temperature value to the concentrator;
22) the composite sensor collects high-frequency current data and power-frequency current data through the composite CT according to background configuration and then sends the data to the concentrator;
23) after the concentrator collects the data sent by the infrared sensor and the composite sensor, the data are transmitted to a background server through 4G wireless communication;
24) after the background server receives the data, whether a partial discharge signal exists in the cable or not and the strength of the discharge signal are obtained through high-frequency current data analysis; analyzing power frequency current data to obtain the magnitude of current passing through the crossed interconnection line, and using the magnitude as a basis for judging whether current abnormity exists in the line; and then displaying the analysis result on a WEB page.
Example 2:
as shown in fig. 1, a monitoring system for a high-voltage cable terminal connector comprises a concentrator, three infrared sensors, three composite CTs, an electricity-taking CT and a background server; the concentrator adopts an ARM processor and is provided with an Ethernet port, an RS485 interface and a 4G wireless module; the infrared sensor is an infrared camera, an ARM chip is arranged in the infrared sensor, and an Ethernet port is arranged in the infrared sensor; the composite sensor adopts STM32 series processors and is provided with an RS485 interface; the composite CT is mainly a CT which can collect power frequency current and high frequency current and is combined into one.
It should be understood that the above-described embodiments are merely examples for clearly illustrating the present invention and are not intended to limit the practice of the present invention. Other variations and modifications will be apparent to persons skilled in the art in light of the above description; this is not necessary, nor exhaustive, of all embodiments; and obvious variations or modifications of the utility model may be made without departing from the scope of the utility model.
Claims (6)
1. A monitoring system of a high-voltage cable terminal connector is characterized in that: the system comprises a concentrator, three infrared sensors, three composite CTs, an electricity-taking CT and a background server;
the concentrator is arranged on an iron tower where the cable terminal connector is located, is used for managing the infrared sensor and the composite sensor which are connected below, collecting data collected by the infrared sensor and the composite sensor and sending the data to the background server; receiving acquisition configuration and sensor configuration from a background server as a 'bridge' for the sensor and the background server;
the infrared sensors are arranged on an iron tower where the cable terminal connectors are located, and the three infrared sensors respectively shoot A, B, C infrared pictures of the three-phase cable terminal connectors;
the composite sensor is arranged on an iron tower where a cable terminal connector is arranged and connected with the composite CT; the composite sensor collects high-frequency current data and power-frequency current data through the composite CT;
the composite CT is designed as an opening and is clamped on a cable cross interconnection line;
the electricity taking CT is designed to be an opening, is arranged on the main bus and is used for providing power supply support for the monitoring system;
the background server is deployed at the cloud or locally according to the requirements, provides a WEB page, configures the concentrator and the sensor, stores and analyzes the reported data, displays the result on the WEB page, and is responsible for communication with the concentrator.
2. The monitoring system of a high voltage cable termination joint as claimed in claim 1, wherein: the concentrator adopts an ARM processor and is provided with an Ethernet port, an RS485 interface and a 4G wireless module.
3. The monitoring system of a high voltage cable termination joint as claimed in claim 1, wherein: the infrared sensor is an infrared camera, an ARM chip is arranged in the infrared sensor, and an Ethernet port is arranged in the infrared sensor.
4. The monitoring system of a high voltage cable termination joint as claimed in claim 1, wherein: the composite sensor adopts STM32 series processors and is provided with an RS485 interface.
5. The monitoring system of a high voltage cable termination joint as claimed in claim 1, wherein: the composite CT is mainly a CT which can collect power frequency current and high frequency current and is combined into one.
6. A monitoring method for a high-voltage cable terminal connector is characterized by comprising the following steps: partial discharge and temperature monitoring of a high voltage cable termination joint using a monitoring system according to any of claims 1-5, comprising:
the installation of a monitoring system comprises the following steps:
11) deploying a background server to a server in a public network environment, and adding and configuring a concentrator, an infrared sensor and a composite sensor;
12) firstly, sequentially installing a concentrator, a composite sensor and an infrared sensor on an iron tower where a cable terminal joint is located; then, the composite sensor is connected with the concentrator by adopting an RS485 bus, and the infrared sensor is connected with the concentrator by adopting a network cable;
13) firstly, connecting a line of the composite CT to the composite sensor, and then installing the composite CT on a cable cross interconnection line;
14) firstly connecting a wire of the power-taking CT to a concentrator, and then installing the power-taking CT on a main bus;
(II) the monitoring system starts to work, and partial discharge and temperature monitoring are carried out on the high-voltage cable terminal connector:
21) the three infrared sensors respectively shoot A, B, C infrared pictures of the three-phase cable terminal connector according to background configuration, and the highest temperature value is read from the infrared pictures shot each time; then sending the shot infrared picture and the corresponding highest temperature value to the concentrator;
22) the composite sensor collects high-frequency current data and power-frequency current data through the composite CT according to background configuration and then sends the data to the concentrator;
23) after the concentrator collects the data sent by the infrared sensor and the composite sensor, the data are transmitted to a background server through 4G wireless communication;
24) after the background server receives the data, whether a partial discharge signal exists in the cable or not and the strength of the discharge signal are obtained through high-frequency current data analysis; analyzing power frequency current data to obtain the magnitude of current passing through the crossed interconnection line, and using the magnitude as a basis for judging whether current abnormity exists in the line; and then displaying the analysis result on a WEB page.
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| CN202210025126.9A CN114397544A (en) | 2022-01-11 | 2022-01-11 | Monitoring system and method for high-voltage cable terminal connector |
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| CN202210025126.9A CN114397544A (en) | 2022-01-11 | 2022-01-11 | Monitoring system and method for high-voltage cable terminal connector |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115389855A (en) * | 2022-10-26 | 2022-11-25 | 高勘(广州)技术有限公司 | Method and system for monitoring cable equipment |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115389855A (en) * | 2022-10-26 | 2022-11-25 | 高勘(广州)技术有限公司 | Method and system for monitoring cable equipment |
| CN115389855B (en) * | 2022-10-26 | 2023-05-02 | 高勘(广州)技术有限公司 | Monitoring method and system for cable equipment |
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