The composite terminal is a typical representative of the connector (CONNECTOR), which is composed of a plug (female) and a socket (male) to realize the connection function. For the transfer of voltage, current and signal, this series is characterized by safe, reliable and stable contact, and is mainly used in electric power, communication, industrial control and other industries.
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development path
SCADA (Supervisory Co ntrol and Data Acquisition) system, the full name of the data acquisition and monitoring control system. The SCADA system has been closely related to the development of computer technology since its inception. The SCADA system has evolved to three generations today.
The first generation is a SCADA system based on dedicated computers and dedicated operating systems, such as the SD176 system developed by the Institute of Electric Power Automation for North China Power Grid and the H-80M system designed by Hitachi in Japan for the railway electrification telecontrol system. This phase began in the 1970s when computers were used in SCADA systems.
The second generation is a general-purpose computer-based SCADA system in the 1980s. In the second generation, other computers such as VAX and other general-purpose workstations are widely used. The operating system is generally a general-purpose UNIX operating system. At this stage, the SCADA system combines economic operation analysis, automatic power generation control (AGC) and network analysis in the power grid dispatching automation to form the EMS system (energy management system). The common feature of the first generation and second generation SCADA systems is that they are based on centralized computer systems, and the system is not open, so system maintenance, upgrades, and other networking pose great difficulties.
In the 1990s, according to the principle of openness, EMS/SCADA systems based on distributed computer networks and relational database technologies that can realize large-scale networking are called the third generation. This stage is the fastest growing stage of China's SCADA/EMS system, and all the latest computer technologies are integrated into the SCADA/EMS system. This stage is also the largest period for China's investment in power system automation and power grid construction. The state plans to invest 270 billion yuan in the next three years to transform urban and rural power grids. The state attaches importance to power system automation and power grid construction.
The basic conditions of the fourth-generation SCADA/EMS system have been or will be available and are expected to be born in the early 21st century. The main features of the system are the use of Internet technology, object-oriented technology, neural network technology and JAVA technology to continue to expand the integration of SCADA / EMS system with other systems, comprehensive security and economic operations and commercial operations.
The SCADA system has made breakthroughs in the application technology of the electrified railway telecontrol system, and its application has also developed rapidly. Due to the different characteristics of electrified railways and power systems, the development of SCADA systems is not exactly the same as that of power systems. The mature products on the electrified railway telecontrol system include the HY200 microcomputer remote control system developed by our company and the DWY microcomputer remote control system developed by Southwest Jiaotong University. These systems have reliable performance and powerful functions. They play an important role in ensuring the safety of electrified railway power supply and improving the quality of power supply. The application of SCADA system in railway electrification is indispensable. 
SCADA
SCADA (Supervisory Co ntrol And Data Acquisition) system, namely data acquisition and monitoring control system. The SCADA system is a computer-based production process control and dispatch automation system. It can monitor and control the running equipment in the field to realize various functions such as data acquisition, equipment control, measurement, parameter adjustment and various signal alarms. Due to the different requirements of SCADA in various application areas, the development of SCADA systems in different application areas is not exactly the same.