Application of Electrical Fire Monitoring System in Trina Solar (Shanghai) Co., Ltd. R&D Center Project
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Abstract: This article briefly describes the composition principle of electrical fire monitoring system, and analyzes the design basis and related specifications of electrical fire monitoring system in application. Finally, through the example of the research and development center of Trina Solar (Shanghai) Co., Ltd. through the Ankerui residual current electrical fire monitoring system, the realization of the function of the electrical fire monitoring system and its important significance are described.
Keywords: electrical fire; monitoring system; Acrel-6000/B; R&D center;
0 Overview Trina Solar (Shanghai) and R&D Center projects are invested by Trina Solar. Trina Solar Energy Co., Ltd. is registered in Changzhou City, Jiangsu Province, China. It is a “solar photovoltaic vertical integration†company in China and even in the world. It mainly produces monocrystalline silicon rods, silicon wafers, solar cells, solar cell modules, and photovoltaic power plants. Complete system and other products. Trina Solar Co., Ltd. plans to invest in Trina Solar (Shanghai) and R&D center projects in the Zizhu Science Park, Minhang District, Shanghai. The completed contents include: Trina Solar's Asia Pacific Operations Headquarters and National Key Laboratory R&D Center And 100MW high-efficiency battery production base. The project composition is shown in Table 1. After the project is completed, it will become the R&D center of the operational headquarters of Asia Pacific and the national key laboratory of Trina Solar Limited.
Trina Solar has actively accelerated the pace of globalization and promoted the development of high-level talent teams. In recent years, it has introduced international high-level management and R&D personnel from 20 countries and regions. The European, North American and Asia Pacific Middle East regional headquarters have been established in Zurich, Switzerland, San Jose, California, and the United States, and offices have been established in Seoul, Tokyo, Madrid, Milan, Sydney, Beijing, and Shanghai. The company's photovoltaic components and other optoelectronic products are sold to more than 30 countries and regions such as Europe, the United States, Asia Pacific, the Middle East, and Africa. The project is mainly responsible for monitoring the leakage status of the outlets distributed in the distribution boxes on the floor of the site, and promptly reminding the duty-control personnel in the control room to prevent the occurrence of electrical fire.
Trina Solar (Shanghai) and R&D center project site has 48 current ARCM200 residual current meters installed in the distribution boxes on each floor. The field instrument is connected to the control center of the Acrel-6000/B wall-mounted electrical fire monitoring system via a bus.
1 Reference Standards In recent years, in order to increase the intensity of prevention and control of electrical fires, the State has successively formulated or revised a number of relevant standards and regulations to strengthen the prevention of electrical fires. There are:
1.1.GB50045-95 (2005 edition) "High-rise Civil Building Design Fire Protection Code", which provisions in the provisions of 9.5.1: high-rise buildings in the fire risk, personnel intensive and other places should be set up a leakage fire alarm system.
1.2.GB50016-2006 “Code for the Fire Protection of Building Designsâ€, in Clause 11.2.7, stipulates: The following places should be provided with residual current action electrical fire monitoring system. These venues include various types of theaters, halls, warehouses, residential quarters, hospitals, shops, schools, and so on.
1.3. The relevant provisions of the national standard “Building electrical fire prevention requirements and detection methods†also clearly require that “the residual current protection device that automatically cuts off the power supply or alarm should be installed at the power supply inlet endâ€.
1.4. The product of electrical fire monitoring system shall meet: GB14287.1-2005 "Electrical fire monitoring equipment", GB14287.2-2005 "residual current electrical fire monitoring detector", GB14287.3-2005 "temperature-type electrical fire Monitoring Detector"
1.5. Installation and operation of electrical fire monitoring system shall meet GB13955-2005 "Installation and Operation of Residual Current Operation Protection Device"
1.6. The power supply for the electrical fire monitoring system shall meet the requirements of GB50052 "Design Specification for Power Supply and Distribution System". 1.7. The design of electrical fire monitoring system shall meet the requirements of "Design Method for Electrical Fire Monitoring System" (Interim Provisions)
2 System Components Trina Solar (Shanghai) Co., Ltd. R&D center project consists of electrical fire monitoring background, electrical fire detectors and leakage current transformers.
The project communication bus accesses two communication buses. After the buses are handed in series in the power distribution room, they are connected to the wall-mounted background to form the major artery of the electrical fire system. The leakage current transformer in the box is connected to the leakage detector through the current line, and the leakage detector shows leakage in real time. The above constitutes a set of stable, accurate and reliable electrical fire monitoring systems. The system network is divided into three layers:
2.1 Station Control Management Station Control Management The management personnel of the electrical fire monitoring system are the direct windows of human-computer interaction and the top level of the system. Mainly by the system software and necessary hardware devices, such as touch screen, UPS power supply and other components. The monitoring system software calculates, analyzes, and processes various types of data on the site, and responds to the on-site operations by means of graphics, digital display, sound, and indicator lights.
Monitoring host: used for data acquisition, processing and data forwarding. Provides data interfaces within or outside the system for system management, maintenance, and analysis.
UPS: Ensure the normal power supply of the computer monitoring system. When the power supply problem occurs in the entire system, ensure the normal operation of the station control and management equipment.
The background monitoring equipment is set in the control room.
2.2 network communication layer communication medium: The system mainly uses shielded twisted pair, RS485 interface, MODBUS communication protocol to achieve real-time communication between the field device and the host computer.
2.3 Field Device Layer The system topology is as follows:
3 Electrical fire equipment 3.1, Acrel-6000 electrical fire monitoring background:
The main technical parameters of power:
1 rated working voltage AC220V (-15% ~ +10%)
2 Standby power supply: When the main power supply is under voltage or power failure, maintain the working time of the monitoring equipment ≥ 4 hours.
24-hour work communication:
RS485 bus communication, Modbus-RTU communication protocol, transmission distance 1km, can extend the communication transmission distance through the repeater Monitoring capacity:
1 monitoring equipment can monitor up to 200 monitoring units (detectors)
2 can be connected with ARCM series monitoring detector monitoring alarm project:
1 Residual current fault (leakage): Fault cell attributes (part, type)
2 Temperature alarm (over temperature): Fault cell attributes (part, type)
3 Current fault (overcurrent): fault cell attributes (part, type)
Monitoring alarm response time: ≤30s
Monitoring alarm sound pressure level (A weighting): ≥70dB/1m
Monitoring alarm light display: red LED indicator, red light alarm signal should be maintained until manual reset monitoring alarm sound signal: can be manually eliminated, when there is alarm signal input again, can start the alarm alarm item again:
1 An open circuit or short circuit occurs in the communication cable between the monitoring device and the detector. 2 Monitors the main power supply undervoltage or power failure 3 The connection between the charger and the battery charging the battery is open or short circuit fault alarm response time: ≤ 100s
Monitoring alarm sound pressure level (A weighting): ≥70dB/1m
Monitoring alarm light display: yellow LED indicator, yellow light alarm signal should be kept until troubleshooting troubleshooting alarm sound signal: can be manually eliminated, when there is alarm signal input again, can restart the fault period, the normal operation of non-fault loop is not affected Impact control output:
Alarm control output: 1 set of normally open passive contacts, capacity: AC250V3A or DC30V3A
Self-inspection project:
1 Indicator check: alarm, fault, operation, main power supply, backup power indicator 2 display check 3 acoustic device check self-test time ≤ 60s
record:
1 Record content: Record type, occurrence time, detector number, area, fault description, can store no less than 20,000 records 2 records query: According to the record date, type and other conditions query operation classification:
1 Daily shift: Real-time status monitoring and event record query 2 Monitoring operation level: real-time status monitoring, event record query, remote reset of probe, device self-test 3 System management level: real-time status monitoring, event record query, remote reset of the detector , equipment self-check, monitoring equipment system parameter query, monitoring equipment, individual modules, individual operators, operator addition and deletion using environmental conditions:
1 Workplace: fire control room, manned on-site substation (distribution room), on-site walls in the manned room 2 working environment temperature: 0 °C ~ 40 °C
3 working environment relative humidity: 5% to 95% RH
4 Altitude: ≤2500m
3.2, ARCM200L series instrument ARCM200L type residual current electrical fire monitoring detector is designed for TT, TN system below 0.4kV, through the distribution circuit of the residual current, wire temperature, over-current, over-voltage and other fire hazard parameters Implementation of monitoring and management to prevent the occurrence of electrical fires, and real-time monitoring of a variety of power parameters to provide accurate data for energy management. Products using advanced microcontroller technology, high degree of integration, compact size, easy installation, intelligent, digital, network in one, is the building electrical fire prevention and control, insulation insulation system, such as the ideal choice. The product meets the standard requirements of GB 14287.2-2005 "Electrical fire monitoring system Part 2: Residual current electrical fire monitoring detector".
4 System Functions 4.1. Monitoring Alarm Function:
The monitoring equipment can receive the leakage and temperature information of multiple detectors. When the alarm sounds, an audible and visual alarm signal is emitted. At the same time, the red “alarm†indicator light on the equipment is on. The display indicates the alarm location and type of alarm, records the alarm time, and the sound and light alarm keeps Until the display resets the detector remotely. The audible alarm signal can also be manually cancelled using the display “Mute†button.
4.2. Fault alarm function Communication fault alarm: When a communication fault occurs between the monitoring device and any of the connected detectors, the corresponding detector in the monitoring screen displays a fault prompt, and the yellow “fault†indicator light on the device is on. And issue a fault alarm sound.
Power failure alarm: When the main power supply or backup power supply fails, the monitoring device also emits an audible and visual alarm signal and displays the fault information. You can enter the corresponding interface to view the detailed information and cancel the alarm sound.
4.3. Self-check function Check if all status indicators, display screens and speakers in the device are normal.
4.4. Alarm record storage inquiry function When leakage, over-temperature alarm or communication, power supply failure occurs, the alarm location, fault information, alarm time and other information are stored in the database. When the alarm is released and the fault is eliminated, it is also recorded. Historical data provides a variety of convenient and fast methods for searching.
4.5. Power Supply Function When the main power supply has power failure or undervoltage, the monitoring device can automatically switch to the standby power supply. When the main power supply resumes normal power supply, it automatically switches back to the main power supply, ensuring continuous and stable operation of the monitoring device during the switchover.
4.6. Detector Control Function By monitoring the software operation, remote reset control of all detectors connected to the device can be performed.
4.7. Authority Control Function To ensure the safe operation of the monitoring system, the monitoring device software operation authority is divided into three levels. Different levels of operators have different operation authority.
5 Conclusions Trina Solar (Shanghai) Co., Ltd. R&D center project The electrical fire monitoring system consists of an electrical fire monitoring installation Acrel-6000/B and a leakage fire detector leakage fire detector ARCM200L. Acrel-6000 electrical fire monitoring system is an independent research and development by the company to receive the residual current electrical fire detectors and other field equipment signals to achieve the alarm, monitoring, control and management of the protected electrical circuit running on the computer's industrial level Hardware/software system. This system is applied to fire control centers in large shopping malls, living quarters, production bases, office buildings, shopping malls and hotels, and remotely measures, remotely adjusts, remotely controls, and remotely detects the detectors scattered in buildings to facilitate monitoring and management. The system uses a standard Modbus field bus to connect detectors with communication functions. When the detected parameters in the field protection circuit exceed the alarm setting value, it can send alarm signals, control signals, can indicate alarm locations and save alarms. information. The field instrument is connected to the control center of the Acrel-6000/B wall-mounted electrical fire monitoring system via a bus. This system has the advantages of convenient installation and transportation, high cost performance, and easy maintenance.
References [1]. Ren Cheng, Zhou Zhong, Principles and Application Guide for Power Electronic Measurement Digital Meters [M]. Beijing. China Electric Power Press.
[2]. Zhou Zhong. Application of Power Meters in Measurement of Energy in Large Public Buildings [J]. Modern Building Electric 2010.6
About the Author:
Zhou Jie female, undergraduate, Jiangsu Ankerui Electric Manufacturing Co., Ltd., the main research direction for the smart grid power distribution