This article mainly introduces Qidong Dongyue Pharmaceutical Co., Ltd. using Acrel-2000 power monitoring system to monitor the motor distribution circuit of low-voltage power distribution system. Yang Junjun An Kerui Electric Co., Ltd. Shanghai Jiading
0 Project Overview
Qidong Dongyue Pharmaceutical Co., Ltd. is located in Qidong Binjiang Pharmaceutical and Chemical Industry Park. It is a high-tech enterprise in Jiangsu Province. It passed the national GMP certification in 2006 and passed the national GMP review in 2011. It covers an area of ​​more than 200 acres and has eight standard workshops. More than 1,000 square meters of laboratories, etc. The project is designed for the monitoring of 60 motor protectors in a workshop of Qidong Dongyue Pharmaceutical Co., Ltd. The motor protectors are installed in the power distribution room and the duty room is located in the workshop.
1 User requirements
The system should realize the data collection, operation monitoring, accident warning, accident record and analysis, motor protection, etc. of the company's motor during operation through the motor protection device, communication network and computer software. The effectiveness, operation, maintenance and management of the motor protection. The safety of equipment plays an active role. The system consists of the main control layer, communication management layer and field control layer. The system requires that devices that collect data intensively be minimized to ensure the communication reliability of the system.
1.1 Product requirements
1) Overload protection: When the motor is overloaded for a long time, it will cause the motor to overheat, the insulation is lowered and burned. The protector calculates the heat capacity of the motor according to the heating characteristics of the motor, and simulates the heating characteristics of the motor to the motor. Protect.
2) Underload protection: When the load on the motor is a pump load, the motor will be harmed by no-load or under-load operation. The protector provides under-load protection when the percentage of the three-phase average current and rated current is lower than the set value. The protector should trip during the trip (delay) set time.
3) It has RS485 communication interface and complies with MODBUS-RTU communication protocol.
1.2 System Requirements
1) Data acquisition and processing: real-time collection of various analog quantities on site through the interval layer unit;
2) Screen display: position status, displacement information, protection device action and reset information of all devices, real-time data of each measured value, various alarm information, status information of the computer monitoring system;
3) Recording function: It has the memory function for various historical data, which can be queried, reviewed and printed at any time.
4) Alarm processing: Users can classify and filter alarms according to their own wishes, and classify alarms into different alarm windows. According to different alarm levels, alarms are used to launch pictures, light display, stripe flashing and different sound levels. ;
5) Maintenance function: The system should have a complete maintenance function, allowing the system management engineer to diagnose, manage, maintain and expand the system online;
6) It should have perfect user management functions to avoid unauthorized operation;
2 Design Principles Reference Standards
2.1 Design principles
1) Openness: This system will involve equipment technology of different manufacturers and the expansion requirements of the system. In the product technology selection of this project, avoid using proprietary technology, so that the system hardware and software platform is fully open. Sex.
2) Advancement: The software and hardware platform construction of the system, the design and development of the application system, and the product technology adopted by the system maintenance management all take into account the current development trend of the technology, and adopt relatively advanced and relatively mature market product technologies to meet the future of the system. Development needs.
3) High performance: The system design should be comprehensively analyzed from the perspectives of server processing capability, network bandwidth transmission capability, software system efficiency, etc., rationally design the structure, and make the system have sufficient processing capacity to adapt to a large amount of data processing and user access requirements. System service quality.
4) Security: The system attaches great importance to security issues. From the operating system layer, network layer, and application layer, there are corresponding measures to address the requirements of transmission security, system security and information security.
5) Reliability: The system should consider the system structure, network structure, technical measures, equipment selection and other aspects to ensure that there is no single fault node in the system to achieve 7X24 uninterrupted service.
6) Scalability: In this system, all network, server, storage, and application software are designed to follow the principle of extensibility to achieve expansion as demand evolves. The system adopts a modular structure, which has good compatibility and expandability, so that devices and systems of different manufacturers can be integrated into the same platform, and the system can be easily expanded according to user requirements in the future.
2.2 Reference Standard
1) ISO/IEC11801 "International Integrated Wiring Standards"
2) GB/50198 "Technical Specifications for Monitoring System Engineering"
3) GB50052-2009 "Design Specification for Power Supply and Distribution System"
4) GB50054-2011 "Low-voltage power distribution design specification"
5) DL/T 698.1-2009 "Part 1: General"
6) DL/T 698.2-2010 "Part 2: Technical Specifications for Master Stations"
7) DL/T 698.31-2010 "Section 3.1: Technical Specifications for Power Information Collection Terminals - General Requirements"
8) DL/T 698.35-2010 "Part 3-5: Technical specification for power information collection terminal - Particular requirements for low-voltage centralized meter reading terminal"
9) DL/T 698.41-2010 "Part 4-1: Communication Protocol - Communication between the primary station and the power information collection terminal"
10) DL/T 698.42-2010 "Part 4-2: Communication Protocol - Concentrator Downlink Communication Protocol"
11) DL/T 698.41-2010 "Part 4-1: Communication Protocol - Communication between the primary station and the power information collection terminal"
12) DL/T 698.42-2010 "Part 4-2: Communication Protocol - Concentrator Downlink Communication Protocol"
3 solutions
The solution of this project is: 60 ARD2F motor protectors installed in the distribution room, which are divided into 4 RS485 buses connected to the serial port server, and the serial port server uplink Ethernet access to the power monitoring system background host.
3.1 Field device layer
Field equipment layer instruments mainly include: Ankerui ARD2F motor protection device.
3.2 Network communication layer
Communication medium: ARD2F uses shielded twisted pair cable to access serial port server through RS485 bus; serial port uplink cable accesses background power monitoring system.
3.3 Station management
The station management layer is for the management of the distribution network, which is directly facing the user. This layer is also the uppermost part of the system, mainly by power system software and necessary hardware equipment such as computers, printers, UPS, etc. The software part has a good human-computer interaction interface, and reads various kinds of data information collected by the front-end machine through the data transmission protocol, and automatically performs calculation and processing, and reflects the operation state of the scene by means of graphics, digital display, sound, etc., and Accept the operation instructions of the management personnel, send and detect the execution status of the operation in real time to ensure the normal operation of the power supply unit; the energy measurement management function is designed to conform to the user's report format, and the data in the report is strictly measured according to various standards. Users only need to find the print, which greatly facilitates the operation and improves the work efficiency. The system structure topology is as follows:
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4 system function
4.1 Distribution monitoring
The Acrylic Acrel-2000 power monitoring system has a friendly human-machine interface for viewing the operating parameters and fault conditions of the power distribution circuit motor protectors. The main data includes: three-phase current, three-phase voltage, power, motor state. After logging in to the system as an administrator, you can click on the loop name in the system map to modify the loop name directly. After the modification, the system will automatically save it. In this interface, you can view the detailed parameters of the motor protector. The motor control chart can view the three-phase current path of each motor, the motor starts running, and the motor can be controlled when the administrator logs in.
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4.2 load curve
The Acrylic-Acrel-2000 power monitoring system designed a load trend curve for the total incoming line of the distribution system (or the exit of critical loads). It is convenient for distribution and maintenance personnel to keep abreast of the demand of power consumption and the load of power supply system to ensure the reliability of power supply and provide guarantee for the energy use rights of user units. With this feature, you can also analyze the growth trend of energy demand.
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4.3 Electrical Parameters Report
The Acrylic-Acrel-2000 power monitoring system has the function of storing and managing real-time power parameters and historical power parameters. All real-time data collected, sequence event records, etc. can be saved to the real-time database. In the monitoring screen, you can customize the parameters that need to be queried, the time period of the query, or select the number of records that have been updated recently, and display them in a report mode. This feature makes it easy for users to conduct accident tracking queries.
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4.4 Telemetry real-time and historical alarms
The Acrylic-Acrel-2000 power monitoring system is equipped with a remote alarm configuration function. The system can monitor and alarm the telemetry alarm signal in real time. When the system alarms, the information voice prompt can be made, and the alarm screen is automatically popped up. The system can store the telemetry alarm data, which is convenient for users to trace the system alarm events.
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4.5 User Rights Management
Ankerui Acrel-2000 power monitoring system sets up user rights management function to ensure the safe and stable operation of the system. Unauthorized operations (such as power distribution loop name modification, etc.) can be prevented by user rights management. You can define login names, passwords, and operation rights for users of different levels to provide reliable security for system operation and maintenance management.
5 Conclusion
With the increasing demand for intelligent management of customer terminals, the application of power monitoring systems has become a development trend. The application of the Acrel-2000 power monitoring system introduced in the power monitoring system project of Qidong Dongyue Pharmaceutical Co., Ltd. realizes the protection of the motor distribution circuit of Qidong Dongyue Pharmaceutical Co., Ltd. Centralized monitoring. The system analyzes and processes the collected data, displays the running status and alarm status of each monitoring device in real time, and generates various reports, analysis curves, graphics, etc., which is convenient for the administrator to carry out equipment management and operation and maintenance. The system is safe, reliable and stable, and provides a scientific basis for the maintenance of power systems and equipment in the later period.
references
[1]. Ren Zhicheng Zhou Zhong. Principles and Application Guidelines of Power Electrical Measurement Digital Instrumentation [M]. Beijing. China Electric Power Press. 2007. 4
[2]. Zhou Zhong. Application of power meter in electric energy metering of large public buildings [J]. Modern Building Electric 2010. 6
About the Author
Yang Junjun, female, undergraduate. Position: Now working for Ankerui Electric Co., Ltd., contact number, mobile phone, QQ
Http://news.chinawj.com.cn Editor: (Hardware Business Network Information Center) http://news.chinawj.com.cn
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