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There are many power equipment in the power system. According to their different roles in operation, they are usually divided into electrical primary equipment and electrical secondary equipment.

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There are many power equipment in the power system. According to their different roles in operation, they are usually divided into electrical primary equipment and electrical secondary equipment.

Power Primary Equipment

The equipment that directly participates in the production, transformation, transmission, distribution, and consumption of electrical energy is called electrical primary equipment, mainly including:

Equipment for power generation and conversion, such as generators, motors, transformers, etc .;

Switching appliances that switch on and off circuits, such as circuit breakers, disconnectors, contactors, fuses, etc.

Current-carrying conductors and gas-insulated equipment. Such as bus bars, power cables, insulators, wall bushings, etc.

Equipment that limits overcurrent or overvoltage, such as current limiting reactors, arresters, etc.

Transformer equipment: talk about the reduction of high voltage and high current in the primary circuit, for measuring instruments and relay protection devices, such as voltage transformers, current transformers

Power secondary equipment

In order to protect and ensure the normal operation of electrical primary equipment, equipment that measures, monitors, controls, and adjusts its operating state is called electrical secondary equipment. There are various measuring meters, various relay protection and automatic power equipment maintenance:

The installation of electrical secondary equipment constitutes a system, not only the device itself, such as AC, DC, control loops, etc., because some loops have no monitoring means, it is impossible to perform real-time technical analysis and judgment on the equipment status. Therefore, in terms of the current application status of electrical secondary equipment, most protections do not have the conditions for condition maintenance.

There are serious defects in the planned maintenance system adopted by most power equipment in the power system, such as frequent temporary maintenance, insufficient or excessive maintenance, and blind maintenance, which make countries around the world spend huge amounts of equipment maintenance every year. How to reasonably arrange the maintenance of electric equipment, save maintenance costs, reduce maintenance costs, and at the same time ensure high reliability of the system is an important issue for system operators. With the application of integrated intelligent systems such as sensing technology, microelectronics, computer software and hardware, and digital signal processing technology, artificial neural networks, expert systems, and fuzzy set theory to condition monitoring and fault diagnosis, equipment-based condition monitoring and advanced diagnostic technologies The research on condition maintenance has been developed and has become an important research area in power systems. Installation, DC power supply equipment, etc.