What functions should a power monitoring backend have?

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This post was last edited by shrien on 2016-1-2 at 09:26. Microcomputer-based protection has replaced the previous relay-based protection; its intelligence is reflected not only in more flexible protection functions, greater sensitivity, and higher reliability, but also in its communication capabilities. This is significantly different from the previous relay protection. So how is that achieved? Generally, microcomputer-based protection systems are equipped with communication interfaces; initially, these were 485 communication interfaces that used shielded twisted pair cables for communication, and later they evolved to dual 485 communication. 485 communication generally has good resistance to interference and a long communication distance, but the data rate is not very high; the typical baud rate is 9600. Later, Ethernet communication was introduced; compared to 485 communication, Ethernet offers higher speeds and better reliability. In most cases, the networking approach involves connecting the microcomputer-based protection devices to a communication management unit, which is then connected to the backend to facilitate communication. The general structure is as follows: Then, the complete backend should have the following functions: 1) Communication devices on the site must be able to communicate, and the backend monitoring system should be able to display all relevant data. In addition to microcomputer protection, there are also DC panels, network meters, electricity meters, and low-current grounding line selection devices. And create the corresponding visuals. 2) Real-time changes in data telemetry, remote signaling, and remote pulse monitoring. Remote control and remote tuning have fast response speeds, which means that message updates occur relatively quickly, meeting the actual requirements of the field. 3) The backend system must be compatible with the computer-based monitoring software; the appropriate system should be selected based on that software. Common systems used in field applications include Windows 2000, Windows XP, Win7, Unix, and Linux. 4) Install the database, which is reliably compatible with the backend monitoring system and operates stably. It is usually SQL Server, MySQL, etc., to ensure the stable operation of historical databases. Prepare reports and historical curves as requested by the station’s operation and maintenance staff. 5) When there are two hosts in the backend, the typical configuration is a primary and a secondary host.