Today we are going to talk about microcomputer protection technology. How does it become the mainstream trend of relay protection in power systems in the future? How does such technology work?
First of all, let's first understand the concept of microcomputer protection. It is a microprocessor-based relay protection technology that is particularly suitable for use in modern high-voltage power grids and complex electrical systems. It combines advanced digital processing technology to achieve more accurate and efficient power system monitoring and control.
On this basis, we need to talk about the composition of microprocessor protection technology. It includes two aspects: hardware and software, of which the hardware part is mainly composed of six functional components: data acquisition subsystem, microprocessor body, digital input and output port, working power supply, human-computer interaction interface and communication port. The software part is composed of several parts, such as the startup program unit, the data collection management module, the fault detection unit, the error calculation unit and the self-diagnosis unit.
Behind it, the digital system at the core of a computer protection device is roughly composed of processor elements such as the CPU (CPU), memory elements, timers and timers, and watchdogs. Among them, the watchdog can restart the protection system in the event of an accident; Memory ensures that the storage of information is safe and secure enough. Nowadays, embedded microcontrollers (MCUs) are mostly used as the main body of this digital core on the market, which is what we often call single-chip microcomputers.
In the application of microprocessor protection technology, we will also involve the design and construction of input and output channels. These include analog input channels, which contain quantity conversion circuitry, low-pass filters, and sampling and AD conversion. In addition, there are digital input and output channels, which mainly process and emit user-related status, alarm signals, trip signals and other information.
So do you know what role relays play in microcomputer protection devices?
The application of relays in microcomputer protection devices, 2 to 3 for a single machine, at present, take the more well-known products in the industry as an example, is G5NB-1A-E DC5; The function is to control the current break, and finally achieve current overload protection; The G5NB uses a high-power electromagnetic circuit. It achieves high sensitivity, is compact, and can ensure an impulse voltage of 10kV.
The design and presentation effect of each product is different, and the specifications required will be slightly different, how can you choose a relay that meets the design and manufacturing needs in the vast sea of relays?
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