System integration technology directly affects the breadth and level of application of instrumentation and measurement control science and technology, especially has a decisive impact on the automation level and efficiency of large projects, systems, and installations. It is an information fusion control technology at the system level, including system requirement analysis and modeling technology, physical layer configuration technology, information communication conversion technology for various parts of the system, and application layer control strategy implementation technology.The ELD series intelligent power meters (hereinafter referred to as meters) are designed and manufactured specifically for the power monitoring needs of power supply and distribution systems. It can measure all commonly used electrical parameters with high accuracy, such as three-phase voltage, three-phase current, active power, reactive power, frequency, power factor, four quadrant electrical energy, etc; Long life LED/LCD display instrument measurement parameters and operational information of the power grid system; Equipped with RS485 communication interface and adopting MODBUS_STU communication protocol; The dashboard has four programming buttons, allowing users to easily switch displays and program instrument parameters on site, with strong flexibility.

Intelligent control technology is a technology that enables humans to monitor intelligent tools, equipment, and systems in a near optimal manner through measurement and control systems to achieve predetermined goals. It is a technology that directly involves the effectiveness of measurement and control systems and is the key to the development from information technology to knowledge economy technology. Intelligent control technology can be said to be the most important and critical software resource in measurement and control systems. From the current development trend, in the three-level structure of ERP/MES/PCS computer measurement and control systems for enterprise informatization, the price of software has exceeded three times that of hardware.

AndELDThe intelligent power instrument online acquisition system is designed to meet the production and operation needs of the power and process control automation fieldsELD seriesA set of intelligent online acquisition system developed for intelligent power meters. It can be widely used in energy management, power grid automation, residential power monitoring, complete equipment switchgear and other occasions. It has the advantages of easy installation, simple wiring, easy maintenance, small engineering quantity, programmable input parameters on site, and can fully replace different PLC and industrial control computer communication software in the industry.

2. Product features

·Data collection: With the rapid development of science and technology and the continuous improvement of automation, the intelligence of instruments and meters has become mainstream and will develop towards high precision and high technologyELDThe intelligent power instrument online collection system is designed according to the requirements of intelligence and automation, which can collect data with high precision. The accuracy of the collected data is consistent with the accuracy of the instrument itself, and users can set the frequency of data collection according to their needs. The collected data can be exported and stored in Excel document format for easy statistics and calculations.
·Stability: The program is stable and there will be no non-human exit during the collection process. Extremely high reliability and safety, as well as relatively low cost, can be installed on every high-voltage switchgear or equipment.
·Progressiveness:ELDThe intelligent power meter online collection system is equipped with standard communication interfaces and can be connected to the internet for operation. Through computer networks, remote monitoring and data collection of equipment can be achieved, and data on operating power parameters can be recorded to provide parameters for various job groups to analyze their needs and achieve timely monitoring of equipment.

3. Working principle and composition of the product

4. System functions
·Parameter display function
1. Real time: The time inside the instrument is the same as Beijing time, and the time collected at a certain point in time is called Beijing time.
2. Synchronization: The collection frequency of multiple intelligent power meters should be consistent, and multiple intelligent power meters should collect dataThe electrical parameters, such as three-phase voltage, three-phase current, active power, reactive power, frequency, power factor, and four quadrant electrical energy, can be displayed simultaneously.
·Communication function
ELD series intelligent power meterIt has an RS485 interface. Used for use with computers or withelebestNetwork controller communication adopts standard communication protocol, which is open to users and convenient for secondary development.
·ELD series intelligent power meter
The ELD series intelligent power meters (hereinafter referred to as meters) are designed and manufactured specifically for the power monitoring needs of power supply and distribution systems. It can measure all commonly used electrical parameters with high accuracy, such as three-phase voltage, three-phase current, active power, reactive power, frequency, power factor, four quadrant electrical energy, etc; Long life LED/LCD display instrument measurement parameters and operational information of the power grid system; Equipped with RS485 communication interface and adopting MODBUS_STU communication protocol; The dashboard has four programming buttons, allowing users to easily switch displays and program instrument parameters on site, with strong flexibility.
·System software
ELDThe intelligent power meter online acquisition system is connected to the local area network through a network interface (multiple can be attached within the local area network)ELD series intelligent power meter）The on-site data information is transmitted remotely, and users are equipped with fully functional and user-friendly software that can monitor any one through the networkELD series intelligent power meterMeasure the results and perform data analysis on the power parameters measured during operation.
The software is divided into two parts: the server and the query end, with the main functions as follows: displaying the system diagram of the tested device; Real time display function of power parameters; Real time display function of parameter curve; Functions such as storing, querying, and printing historical data, curves, and events (detailed functions can be found in the software user manual).