How to measure temperature of cable joints in ring main unit

ឧបករណ៍ចាប់សញ្ញាសីតុណ្ហភាពអុបទិក, ប្រព័ន្ធត្រួតពិនិត្យឆ្លាតវៃ, ក្រុមហ៊ុនផលិតខ្សែកាបអុបទិកចែកចាយនៅប្រទេសចិន

Fiber optic temperature measurement system for cable joints in ring main unit
Power cables are widely used in power system transmission and distribution due to their durability, small footprint, and ability to be laid in various situations. ទោះយ៉ាងណាក៏ដោយ, the internal cable joints of the ring main unit are prone to heating due to various reasons, and the degree of heating will affect the operation of the ring main unit itself and even the safety of the entire power grid. Excessive temperature of cable joints can cause severe oxidation, leading to a sharp reduction in the service life of the cable; Causing cable joint explosions, insulation breakdown, combustion and other hazards, resulting in large-scale power outages and fire accidents. In order to achieve real-time online monitoring and alarm of cable joints, it is necessary to add temperature sensors for real-time temperature monitoring of cable joints.

The fiber optic temperature measurement system for the cable joint of the ring main unit adopts a fluorescent fiber optic temperature measurement device. The sensing probe of this device is made of imported quartz fiber optic material, which has complete electrical insulation and is not affected by high voltage and strong electromagnetic fields. It is resistant to chemical corrosion and pollution. ជាងនេះ។, the temperature measurement probe has been processed by our company to increase the temperature measurement area, which can measure the temperature of the outer wall of the cable joint. The response speed is fast, the installation is simple, and it is resistant to high temperatures. ក្នុងពេលជាមួយគ្នា, the system also provides remote web transmission, making it convenient for customers to install communication software and remotely monitor on any computer.

Construction goals for fiber optic temperature measurement of cable joints in ring main unit cabinets
1) Establish an automatic meter reading and fiber optic temperature measurement system for the cable joints of the power consumption control ring network cabinet, to achieve automatic meter reading and statistics of electrical energy data in the temperature measurement system software, remote login access automatic supplementary reading, on-site reading, monitoring and remote control of the temperature of each user’s electrical cable joints, electricity consumption inquiry of each user, payment and recharge, and other functions. Real time monitoring of the temperature of each household’s consumption and each ring network cabinet cable joint.

2) Users can log in to the WEB website of the temperature measurement system software to check real-time temperature, historical data, outstanding payment details, and account balance for payment.

3) Important meter failure information: When the temperature of the cable joint exceeds the alarm value, an alarm should be promptly issued to the supervisory personnel. The system management personnel use the system to monitor the equipment and update internal parameters.

 

Design principles for fiber optic temperature measurement of cable joints in ring main unit cabinets
គោលការណ៍នៃការអនុវត្តជាក់ស្តែង
ការសាងសង់ប្រព័ន្ធប្រកាន់ខ្ជាប់នូវគោលការណ៍នៃការអនុវត្តជាក់ស្តែង. នៅលើមូលដ្ឋាននៃការអនុវត្តជាក់ស្តែង, វឌ្ឍនភាព និងការគិតទុកជាមុនត្រូវបានពិចារណា, និងស្តង់ដារ, ផលិតផលទំនើប និងចាស់ទុំ និងវេទិកាអភិវឌ្ឍន៍ត្រូវបានជ្រើសរើសដើម្បីកសាងប្រព័ន្ធដែលមានប្រយោជន៍ និងដោះស្រាយបញ្ហាជាក់ស្តែង.

គោលការណ៍ស្តង់ដារ
Business applications have the characteristics of complex business, numerous processes, large amount of information, and multiple application levels. Through unified application function planning, consensus can be reached on business operations at the application level, guiding various business units to carry out business with unified standards.

The system software and hardware platforms and application development tools used in the construction of business applications should comply with national standards, ស្តង់ដារនៃក្រសួងឧស្សាហកម្មព័ត៌មាន, លក្ខណៈបច្ចេកទេសពាក់ព័ន្ធ និងតម្រូវការរបស់ក្រុមហ៊ុន.

គោលការណ៍នៃភាពស្មើគ្នា
អនុវត្តតាមគោលការណ៍នៃការគ្រប់គ្រងព័ត៌មានកណ្តាល, ការធ្វើផែនការរួម, ការរចនារួម, និងការអនុវត្តជាជំហាន ៗ, ដំណើរការអនុវត្តមានគោលការណ៍បង្រួបបង្រួមចំនួនបួន: ភាពជាអ្នកដឹកនាំបង្រួបបង្រួម, ផែនការបង្រួបបង្រួម, ស្តង់ដារបង្រួបបង្រួម, និងអង្គការឯកភាព និងការអនុវត្ត.

គោលការណ៍ភាពជឿជាក់
The software and hardware resources need to ensure the uninterrupted and reliable operation of the cable temperature measurement system for 7 × 24 ម៉ោង. ដូច្នេះ, it is necessary to equip a complete design of reliability measures to ensure the high reliability of system operation and fully consider the reliability requirements of key system applications.

យន្តការសុវត្ថិភាពដែលអាចទុកចិត្តបាន។
ប្រព័ន្ធនេះប្រកាន់យកនូវវិធានការអ៊ិនគ្រីបសុវត្ថិភាពជាបន្តបន្ទាប់, ជាមួយនឹងការភ្ជាប់មកជាមួយ 64 ក្បួនដោះស្រាយការអ៊ិនគ្រីបប៊ីត. ប្រព័ន្ធនេះមានសុវត្ថិភាពខ្ពស់ ហើយអាចការពារការលេចធ្លាយទិន្នន័យ និងការលួចទិន្នន័យយ៉ាងមានប្រសិទ្ធភាព, ធានាសុវត្ថិភាព, ភាពត្រឹមត្រូវ, និងភាពសុចរិតនៃទិន្នន័យរបស់ប្រព័ន្ធ, និងទប់ស្កាត់ប្រតិបត្តិការប្រតិបត្តិករខុសច្បាប់ និងប្រតិបត្តិករស្របច្បាប់ ប្រតិបត្តិការខុសច្បាប់. A system may be used by multiple operators, and to ensure system security, hierarchical permission management is implemented. The system administrator authorizes operators with different usage permissions, and each operator can only perform various operations within the scope of permissions, resulting in higher system security.

ចំណុចប្រទាក់ប្រតិបត្តិការគឺសាមញ្ញ, មិត្តភាព, និងឆ្លាតវៃខ្ពស់។
The system provides most of the default data required during operation, and each operation conforms to the actual business workflow, avoiding repetitive operations by operators. ប្រព័ន្ធត្រួតពិនិត្យដោយស្វ័យប្រវត្តិនូវភាពស្របច្បាប់នៃទិន្នន័យបញ្ចូល និងផ្តល់នូវការជម្រុញដ៏ងាយស្រួលសម្រាប់កំហុសរបស់ប្រតិបត្តិករ.

Reasonable system structure design, high degree of abstraction of program functional modules
It can be flexibly configured according to the changes in the actual situation of users and the various needs of different users, to maximize the satisfaction of user needs. There are various rate management and multi type table management functions for users to better use this system.

The system adopts a Web Service platform and a B/S architecture design, which is in line with the trend of application development.
Stable operation, reliable data, actual operation of thousands of systems, and over 200 new projects added each year.
វេទិកាមានភាពងាយស្រួលក្នុងការដំណើរការ, ងាយស្រួលក្នុងការធ្វើជាម្ចាស់, ហើយដំណើរការដំឡើងគឺសាមញ្ញ. ទិន្នន័យអាចត្រូវបានបង្កើតដោយស្វ័យប្រវត្តិទៅក្នុងរបាយការណ៍ផ្សេងៗតាមតម្រូវការ, ការកែលម្អប្រសិទ្ធភាពនៃការគ្រប់គ្រង.
Network topology of fiber optic temperature measurement system

1.1 Overall structure framework of network system

The system consists of five parts: the main station, switch, repeater, transmitter, and fluorescent fiber optic probe. The system master station includes the master station hardware equipment (local server, client workstation, switch, ល។) and the master station software system (operating system, fluorescent fiber optic temperature measurement software, master station application management system).

 

The data transmission channel between the backend system and the collection device is an uplink channel, and the communication method adopts wireless GPRS or Ethernet.

Ethernet or GPRS/CDMA communication is used between the switch and the repeater, and each switch supports 24 10/100Mbps adaptive Ethernet ports.

RS485 or wireless 433M communication method is used between the relay and transmitter

The temperature measurement system in the backend main station system: ការប្រមូលទិន្នន័យទាំងអស់។, ការគ្រប់គ្រង, and temperature display are completed by the main station application software, and the system mainly realizes the data collection and monitoring of temperature measurement.

The uplink communication channel of the switch can adopt Ethernet mode.
The downlink communication of the switch adopts Ethernet or GPRS/CDMA communication methods.
The uplink communication of the relay adopts Ethernet or GPRS/CDMA communication methods.
The downlink communication of the repeater adopts RS485 or GPRS/CDMA communication methods.
The transmitter integrates multi-channel fluorescent fiber optic, providing external 485 communication and anti-interference design.
Composition of fiber optic temperature measurement system for cable joints in ring main unit
The fiber optic temperature measurement system for ring main cabinet cable joints consists of a local server, client computer, switch, repeater, transmitter, fluorescent fiber optic and demodulator.

Application functions of fiber optic temperature measurement system for cable joints in ring main unit
Real time monitoring of fiber optic temperature measurement for cable joints in ring main cabinet
ដង់ស៊ីតេនៃការប្រមូលទិន្នន័យអាចត្រូវបានកំណត់តាមតម្រូវការរបស់អតិថិជន, ហើយប្រព័ន្ធនឹងប្រមូលទិន្នន័យជាទៀងទាត់ដោយផ្អែកលើប៉ារ៉ាម៉ែត្រដែលបានកំណត់. បន្ទាប់មក, វា​នឹង​ត្រូវ​បាន​បង្ហាញ​ជា​ទម្រង់​តារាង ឬ​គំនូរ​កោង​ដើម្បី​សម្រេច​បាន​ការ​ត្រួតពិនិត្យ​តាម​ពេលវេលា​ជាក់ស្តែង. ការត្រួតពិនិត្យពេលវេលាពិតប្រាកដនៃស្ថានភាពប្រតិបត្តិការឧបករណ៍; Real time monitoring and recording of cable joint temperature.

Remote web access function for fiber optic temperature measurement of ring main cabinet cable joints
Customers can download monitoring software from other computers and log in to access temperature data on the server.

Basic functions of fiber optic temperature measurement host for ring main unit cable joints
1) សំណួរទិន្នន័យសីតុណ្ហភាព

អ្នកអាចសួរទិន្នន័យសីតុណ្ហភាពសម្រាប់កាលបរិច្ឆេទដែលបានបញ្ជាក់, រុករក, បោះពុម្ព, និងនាំចេញទៅ Excel.

ការផ្ទុកទិន្នន័យសីតុណ្ហភាពប្រវត្តិសាស្ត្រ
កត់ត្រាទិន្នន័យសីតុណ្ហភាពជាអចិន្ត្រៃយ៍

2.4 SMS reminder
According to the SMS sending requirements, the system will send the following SMS:

Alarm SMS notification
When the temperature of the cable joint exceeds the set alarm value, a text message will be sent to inform the staff.

Abnormal SMS notification
When the transmitter is abnormal, a text message will be sent to inform the staff.

Fiber optic temperature measurement safety design for cable joints in ring main unit
The security of the system is crucial, therefore, in the design of the main station system, the security of the system should be fully considered to prevent unauthorized intrusion and leakage of confidential information. From the perspective of main station system security protection, the system provides security protection in both communication channels and system data.

Data security of fiber optic temperature measurement system for ring main cabinet cable joints
Equipped with three-level security mechanisms at the operating system level, database level, and application software level.

Operating system level: Set different permission passwords on the network, non system administrators cannot operate servers and databases, and ensure system security and relative independence through routing, firewall, and other settings.
Database level: Set up demanders with different permissions and corresponding passwords in the database to ensure that unauthorized demanders cannot use data, and different demanders cannot use data beyond their level.
Application software level: Provides strict user login verification, permission control, and comprehensive management of event logs and operation records. System permission control includes functional permission control and data access permission control.
Function permission control:

The functional permission control system manages permissions from three dimensions: control objects, object operations, and operators. Based on this, it provides authorization methods for control object groups, operation groups, and operator roles. The accuracy of permission control can be determined to specific control objects and operators. The system determines the operation permissions of the login personnel based on these three dimensions.

The control objects of the system include system level nodes, terminal devices, ល។. Each control object has corresponding operations, and each authorization includes three parts: a control object group, an operation or operation group, and an operator role. In order to simplify and facilitate permission management, the system provides control object group permission inheritance.
The system provides a hierarchical authorization mechanism, which enables the system to have the ability of distributed permission management and solves the problem of overly complex permission management.

Data access permissions:

The data access permission control mechanism adopts the security audit mechanism provided by the database, providing data access user control, and providing log auditing for all data operations.

The original database only has query functionality, and the applications used only operate on the application database to ensure data security.
The system can store electricity consumption data with time markers and various analytical application calculation data, with a storage time of more than 2 ឆ្នាំ. លើសពីនេះទៀត, the system has a powerful backup subsystem.
Detailed operation log records are available for all manual intervention data. The system design ensures high fault tolerance, and the database has three levels of data validation: field level, record level, and database level, ensuring the storage of illegal data.
Introduction to fiber optic temperature measurement transmitter equipment for ring main cabinet cable joints
Main characteristics of fiber optic temperature measurement for cable joints in ring main unit cabinets
The fluorescent fiber optic temperature transmitter is wall mounted. This product has unique technical advantages in temperature measurement in special environments such as high voltage and strong electromagnetic interference. The temperature hotspot and measurement signal receiving part of the fluorescent fiber optic temperature sensor used in the transmitter are not electrically connected, ដែលអាចធ្វើការជាមួយនឹងភាពជាក់លាក់ខ្ពស់ និងស្ថេរភាពក្នុងរយៈពេលយូរ, ធ្វើឱ្យប្រសើរឡើងយ៉ាងខ្លាំងនូវជួរកម្មវិធីរបស់វា។. ក្នុងពេលជាមួយគ្នា, fiber optic temperature transmitters effectively eliminate the hidden dangers of the winding of conventional dry-type transformers being used in excessively high temperature environments for a long time, which may shorten its lifespan, or even burn out the winding, which is not conducive to the safe operation of the transformer. The transmitter has high accuracy and sensitivity, is resistant to high pressure and corrosion, can be remotely monitored, has a long service life, មានទំហំតូច, ធ្វើឱ្យការថែទាំឧបករណ៍សាមញ្ញ និងងាយស្រួល, និងធានាការដឹកជញ្ជូនប្រកបដោយសុវត្ថិភាព. Its internal modular integrated design is aesthetically pleasing and reasonable

Main functions of fiber optic temperature measurement system for cable joints in ring main unit
Can install an integrated multi-channel fluorescent fiber optic temperature measurement and demodulation instrument;
Provide RS485 communication interface to connect with the upper computer or LCD display instrument;
Provide temperature collection and transmission