CN114866550A - Environment parameter and insulation fault early warning on-line monitoring system applied to ring main unit - Google Patents

Abstract

The application relates to an environmental parameter and insulation fault early warning online monitoring system applied to a ring main unit, which belongs to the technical field of online monitoring of the ring main unit and comprises a sensor module, a host module, a data transmission module, a cloud server and a user side data platform; the sensor module is in signal connection with the host module, the host module is in signal connection with the data transmission module, the data transmission module is in signal connection with the cloud server, the sensor module is used for monitoring insulation fault parameters and environmental parameters in real time and transmitting the monitored parameters to the host module, the host module transmits the parameters fed back by the sensor module to the cloud server through the data transmission module, the user side data platform can acquire the monitored data from the cloud server and perform statistical analysis on related data, field operation and maintenance personnel can acquire the monitored data and the statistical analysis on the related data from the cloud server through the user side data platform, the ring main unit is overhauled and maintained according to the related data, and faults are eliminated in a bud state.

Description

Online Monitoring System for Environmental Parameters and Insulation Fault Early Warning Applied in Ring Main Unit

technical field

The present application relates to the technical field of online monitoring of ring main units, in particular to an online monitoring system for environmental parameters and insulation fault early warning applied to ring main units.

Background technique

With the rapid development of social economy, human beings are more and more dependent on the energy system, especially the power system. As an important part of the power system, the safe operation of the ring network cabinet is of great significance. Ring network cabinets are generally concentrated in a box, with compact structure and small footprint. They can be placed on the side of roads or buildings to facilitate the management of relevant power supply departments. When a power accident occurs, the power department can deal with the fault in time; It is fully enclosed and fully insulated and placed outdoors, which can adapt to some harsh outdoor environments; at the same time, it has low production cost, convenient maintenance and high economic benefits.

Ring main unit is a common power transmission and distribution equipment, which plays a role of control or protection in the process of power transmission and distribution. The ring main unit contains isolating switches, circuit breakers and related protection devices. When the power system fails, the disconnecting switches can be used to disconnect the connected equipment. On the one hand, it protects the connected power equipment and protects the power operator. security. It can be seen that the ring main unit plays a very important role in the power system. Some ring main units will have insulation defects in the case of continuous operation for many years. These insulation defects are likely to cause electric field distortion during the operation of the switchgear, resulting in partial discharge (PD). If the insulation defects inside the switchgear are not discovered early and allowed to develop to a serious level, it will eventually lead to insulation damage in the switchgear and cause safety accidents, which will bring huge economic losses and negative social impacts to enterprises.

In recent years, there have been many occurrences in the power grid that the insulation material inside the ring main unit is aging, which leads to the burning of the ring main unit. Therefore, the early warning and monitoring of the insulation fault of the ring main unit has become one of the important research directions. The detection methods of partial discharge in the ring main unit mainly include: pulse current method, UHF method, transient ground voltage method, ultrasonic detection method, and optical detection method. However, due to the structure of the ring network cabinet, the test time and location, the testers, and the anti-interference ability of the equipment itself, it is difficult to accurately judge the defect status in the cabinet. Moreover, the above monitoring methods are aimed at monitoring the partial discharge itself. Even if the occurrence of partial discharge is monitored, the degree of insulation damage of the insulating parts in the ring main unit cannot be accurately evaluated.

SUMMARY OF THE INVENTION

Aiming at the problems existing in the prior art, the present application provides an on-line monitoring system for early warning of environmental parameters and insulation faults applied to a ring main unit, which is achieved through the following technical solutions.

An online monitoring system for environmental parameters and insulation fault early warning applied to a ring main unit, comprising a sensor module, a host module, a data transmission module, a cloud server and a client data platform;

the sensor module is in signal connection with the host module;

the host module is signally connected to the data transmission module;

the data transmission module is signally connected to the cloud server;

The sensor module is used to monitor insulation fault parameters and environmental parameters in real time and transmit the monitored parameters to the host module;

The host module transmits the parameters fed back by the sensor module to the cloud server through the data transmission module;

The data transmission module transmits the control instruction received from the cloud server to the host module;

The client data platform implements acquisition of monitoring data from the cloud server and performs statistical analysis of the relevant data.

The present application is further configured as follows: the sensor module includes a first processor, a characteristic signal sensor, a temperature sensor, a humidity sensor, a first wireless module and a first power interface;

the first processor is respectively connected with the characteristic signal sensor, the temperature sensor, the humidity sensor, the first wireless module and the first power interface;

The characteristic signal sensor is used for monitoring insulation fault parameters;

The temperature sensor is used to monitor temperature parameters;

the humidity sensor is used for monitoring humidity parameters;

the first wireless module is used for connecting with the host module;

The first power interface is connected to a power source to supply power to the sensor module.

The present application further provides that: the type of gas monitored by the characteristic signal sensor is carbon monoxide.

The present application is further configured as follows: the host module includes a second processor, a display screen, a button, a serial port, a second wireless module and a second power interface;

the second processor is connected to the display screen, the button, the serial port, the second wireless module and the second power interface;

The display screen is used to display the monitoring value fed back by the sensor module;

The serial port is used for serial connection with the data transmission module;

the second wireless module is connected to the first wireless module;

The second power interface is connected to a power source to supply power to the host module.

The present application is further set as follows: the client data platform is software installed on the mobile phone or PC, and logging into the client data platform on the mobile phone or PC can view the characteristic signal trend graph, temperature trend graph, and humidity trend graph and system operating status.

The present application is further configured as follows: the client data platform is provided with an alarm level, and the alarm level includes a concern value, an inspection value and a damage value;

The attention value is a value that needs continuous attention, and no operation is required;

The inspection value is defined as the value that needs to be checked on site;

The damage value is defined as the value of insulation damage caused by insulation fault in the ring main unit.

The present application further sets that: the value of interest is 5ppm.

The present application further sets that: the inspection value is 20ppm.

The present application further sets that: the damage value is 30ppm.

Compared with the prior art, the beneficial effects of the present application are:

The sensor module transmits the real-time monitoring of the insulation fault parameters and environmental parameters in the ring main unit to the host module, and the host module transmits the parameters to the cloud server through the data transmission module. The on-site operation and maintenance personnel can obtain monitoring from the cloud server through the client data platform Statistical analysis of data and related data, according to the relevant data to repair and maintain the ring network cabinet, eliminate the fault in the bud, avoid the occurrence of safety accidents, and bring huge economic losses and negative social impact to the enterprise.

Description of drawings

In order to illustrate the technical solutions of the present application more clearly, the accompanying drawings that need to be used in the embodiments will be briefly introduced below. Other drawings can also be obtained from these drawings.

Fig. 1 is a structural principle block diagram of an online monitoring system provided by an embodiment of the present application;

FIG. 2 is a structural block diagram of a sensor module provided by an embodiment of the present application;

3 is a structural block diagram of a host module provided by an embodiment of the present application;

FIG. 4 shows a characteristic signal concentration value trend diagram and a temperature and humidity trend diagram displayed by the user terminal data platform provided by the embodiment of the present application.

Detailed ways

In order to make those skilled in the art better understand the solutions of the present application, the following will clearly and completely describe the technical solutions in the embodiments of the present application with reference to the accompanying drawings in the embodiments of the present application.

It should be noted that the descriptions such as "first" and "second" in this document are used to distinguish different messages, devices, modules, etc., and do not represent a sequence, nor do they limit "first" and "second" are different types.

The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only a part of the embodiments of the present application, but not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative work fall within the protection scope of the present application.

In order to accurately judge the defect status in the ring main unit, referring to FIG. 1 , it is a structural principle block diagram of the online monitoring system provided by the embodiment of the present application, including a sensor module, a host module, a data transmission module, a cloud server, and a client data platform ;The sensor module is connected with the signal of the host module; the host module is connected with the signal of the data transmission module; the data transmission module is connected with the cloud server signal; The module and the data transmission module are fixed in the instrument room of the ring main unit. The power supply of the sensor module, host module and data transmission module is taken from the outlet of the AC220V switch in the instrument room of the ring main unit, and the power adapters of the sensor module, host module and data transmission module are respectively connected to the power outlet drawn from the outlet of the AC220V switch in the instrument room superior. The sensor module is used to monitor insulation fault parameters and environmental parameters in real time and transmit the monitored parameters to the host module. The host module transmits the parameters fed back by the sensor module to the cloud server through the data transmission module, and the data transmission module receives the control instructions from the cloud server. It is transmitted to the host module, and the client data platform implements the acquisition of monitoring data from the cloud server and conducts statistical analysis of the relevant data. According to the relevant data, the ring network cabinet is repaired and maintained, and the fault is eliminated in the bud to avoid the occurrence of security accidents. Bring huge economic losses and negative social impact.

As shown in FIG. 2 , the sensor module includes a first processor, a characteristic signal sensor, a temperature sensor, a humidity sensor, a first wireless module and a first power interface.

The first processor adopts a 32-bit embedded new chip processor, and the first processor is respectively connected with the characteristic signal sensor, the temperature sensor, the humidity sensor, the first wireless module and the first power interface.

The characteristic signal sensor is used to monitor the parameters of the insulation fault, and the type of gas monitored by the characteristic signal sensor is carbon monoxide, because the insulating parts in the ring main unit will produce insulation damage and release carbon monoxide due to high temperature or partial discharge. The characteristic signal sensor has the function of temperature compensation, the temperature compensation range is -40°C to +70°C, the measurement concentration range is 0-1000ppm, the resolution is 0.1ppm, and the error is ±3%.

The temperature sensor is used to monitor temperature parameters, and the humidity sensor is used to monitor humidity parameters; since the internal humidity of the ring network cabinet will not be higher than 80% when the secondary equipment (dehumidification equipment, heating equipment) is running normally, the temperature will not be low. at 0°C. The temperature sensor has a measurement range of -40°C-125°C, a resolution of 0.1°C, and an error of ±0.2°C. The humidity sensor has a measurement range of 0-100%, a resolution of 0.1%, and an error of ±2%.

The first wireless module is used for connecting with the host module, and the first power interface is connected to the power supply to supply power to the sensor module.

As shown in FIG. 3 , the host module includes a second processor, a display screen, buttons, a serial port, a second wireless module and a second power interface.

The second processor adopts a 32-bit embedded new chip processor, and the second processor is connected with the display screen, the button, the serial port, the second wireless module and the second power interface.

The display screen uses a 3.5-inch TFT liquid crystal display screen, which is used to display the monitoring values fed back by the sensor module, such as carbon monoxide concentration, temperature and humidity.

The serial port supports RS485 and RS-232, and realizes serial communication with the data transmission module. The data transmission module can also transmit the received control instructions to the host module for execution, which can realize remote control of the monitoring system, including remote program upgrade and remote reset. and other functions.

The second wireless module is connected with the first wireless module, and the sensor module and the host module realize wireless communication to realize data transmission. The second power interface is connected to a power source to supply power to the host module.

The data transmission module adopts 4G DTU (4G network data transmission unit), supports transparent data transmission, supports TCP, UD network protocol, supports TCP/UDP protocol, supports heartbeat packet, registration packet function. The maximum downlink rate of LTE-FDD is 200Mbps and the maximum uplink rate is 75Mbps. The maximum downlink rate of LTE-TDD is 130Mbps and the maximum uplink rate is 35Mbps.

The cloud server has a firewall, which can prevent viruses on the Internet from spreading to the internal network, effectively record the activities on the Internet, and limit the exposure of user points. The entire database is backed up 4 times a week to prevent data loss due to database crash or damage.

The user-end data platform is a software installed on the mobile phone or PC. Log in on the mobile phone or PC to view the trend graph of characteristic signal concentration value, the trend graph of temperature and humidity, and the system running status. The client data platform has alarm levels, which are divided into concern value, inspection value and damage value. The client data platform can record and upload system installation, operation and maintenance information. The on-site operation and maintenance personnel are set in units of sensor modules. Once the warning value is reached, the alarm information can be accurately pushed, which is convenient for the on-site operation and maintenance personnel to deal with the on-site situation in time according to the alarm information.

The value of concern is a value that requires continuous attention, no action is required, and the value of concern is 5ppm.

The inspection value is defined as the value that needs to be checked on site, and the inspection value is 20ppm.

The damage value is defined as the value of insulation damage caused by insulation failure in the ring main unit, and the damage value is 30ppm.

The setting of the alarm value can be properly corrected according to the actual operating temperature, humidity and sensor installation position of the ring main unit.

In the case of system monitoring of insulation faults, the mobile phone receives a short message notification automatically sent by the online monitoring system for insulation fault early warning installed in the ring main unit through the user-end data platform software, indicating that the characteristic signal of the ring main unit has reached the damage value. Log in to the WeChat applet on the mobile phone for fixed-point viewing, and the system monitoring data trend chart is shown in Figure 4.

It can be seen from Figure 4 that the characteristic signal increased sharply from 15:50, reached the maximum value of 30.5ppm at 16:30, and then gradually decreased, and the data basically returned to normal at 20:47. And at the point where the characteristic signal sharply rises, the humidity inside the ring network cabinet increases significantly, and the temperature decreases significantly. It is inferred from the data that the internal insulating parts of the ring network cabinet began to suffer continuous damage and decompose from about 15:50. The decomposition rate of the insulating parts gradually slowed down at about 16:30, and the insulating parts stopped to decompose at about 20:47. On-site inspection was carried out around 17:00, and an obvious continuous discharge sound could be heard at the scene. Subsequently, the power failure was investigated, and obvious discharge traces could be seen near the stress cone of the separable connector in the cable room of the ring main unit. From this, it can be preliminarily confirmed that the insulation damage is caused by the discharge near the stress cone of the separable connector. In order to prevent the accidental power failure caused by insulation breakdown and the expansion of the accident, all the components in the ring main unit will be burned, so the detachable connector should be replaced.

The above specific embodiments further describe in detail the purpose, technical solutions and beneficial effects of the present application. It should be understood that the above are only specific embodiments of the present application, and are not intended to limit the protection scope of the present application. Any modification, equivalent replacement, improvement, etc. made on the basis of the technical solution of the present application shall be included within the protection scope of the present application.

Claims (9)

1. The utility model provides an environmental parameter and insulating trouble early warning on-line monitoring system for looped netowrk cabinet which characterized in that includes: the system comprises a sensor module, a host module, a data transmission module, a cloud server and a user side data platform;

the sensor module is in signal connection with the host module;

the host module is in signal connection with the data transmission module;

the data transmission module is in signal connection with the cloud server;

the sensor module is used for monitoring insulation fault parameters and environmental parameters in real time and transmitting the monitored parameters to the host module;

the host module transmits the parameters fed back by the sensor module to the cloud server through the data transmission module;

the data transmission module transmits the control instruction received from the cloud server to the host module;

and the user side data platform acquires monitoring data from the cloud server and performs statistical analysis on related data.

2. The system for online monitoring of environmental parameters and early warning of insulation faults applied to the ring main unit as claimed in claim 1, wherein the sensor module comprises a first processor, a characteristic signal sensor, a temperature sensor, a humidity sensor, a first wireless module and a first power interface;

the first processor is respectively connected with the characteristic signal sensor, the temperature sensor, the humidity sensor, the first wireless module and the first power interface;

the characteristic signal sensor is used for monitoring an insulation fault parameter;

the temperature sensor is used for monitoring temperature parameters, and the humidity sensor is used for monitoring humidity parameters;

the first wireless module is used for being connected with the host module;

the first power interface is connected with a power supply to supply power to the sensor module.

3. The environmental parameter and insulation fault early warning online monitoring system applied to the ring main unit as claimed in claim 2, wherein the characteristic signal sensor monitors that the gas type is carbon monoxide.

4. The environmental parameter and insulation fault early warning online monitoring system applied to the ring main unit as claimed in claim 3, wherein the host module comprises a second processor, a display screen, a key, a serial port, a second wireless module and a second power interface;

the second processor is connected with the display screen, the keys, the serial port, the second wireless module and the second power interface;

the display screen is used for displaying the monitoring value fed back by the sensor module;

the serial port is used for being connected with the data transmission module through the serial port;

the second wireless module is connected with the first wireless module;

the second power interface is connected with a power supply to supply power to the host module.

5. The system of claim 4, wherein the user data platform is software installed at a mobile phone end or a PC end, and the user data platform is logged on the mobile phone end or the PC end to check a characteristic signal trend graph, a temperature trend graph, a humidity trend graph and a system operation state.

6. The system for monitoring environmental parameters and insulation fault early warning online applied to the ring main unit as claimed in claim 5, wherein the user data platform is provided with alarm levels, the alarm levels including attention values, inspection values and damage values;

the attention value is a numerical value needing continuous attention, and operation is not needed;

the inspection value is defined as a numerical value needing to be checked to the site;

the damage value is defined as a numerical value of insulation damage caused by the existence of insulation faults in the ring main unit.

7. The system of claim 6, wherein the attention value is 5 ppm.

8. The system for the online monitoring of environmental parameters and insulation fault early warning applied to the ring main unit as claimed in claim 6, wherein the inspection value is 20 ppm.

9. The system for the online monitoring of environmental parameters and insulation fault early warning applied to the ring main unit as claimed in claim 6, wherein the damage value is 30 ppm.

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