Electrical machinery and equipment classification Electric machinery and equipment maintenance
Equipment classification
There are many electrical equipment in the power system. According to their different roles in operation, they are usually divided into electrical primary equipment and electrical secondary equipment.
Electrical primary equipment
Equipments that are directly involved in the production, transformation, transmission, distribution and consumption of electrical energy are called electrical primary equipment, which mainly include:
Equipment for producing and converting electric energy, such as generators, motors, transformers, etc.;
Switching appliances that connect and disconnect circuits, such as circuit breakers, isolating switches, contactors, and fuses etc.
Current-carrying conductors and gas-insulated equipment. Such as busbars, power cables, insulators, wall bushings, etc.
Equipments that limit overcurrent or overvoltage, such as current-limiting reactors, arresters, etc.
Transformer equipment: Talk about The high voltage and high current in the primary circuit are reduced and used for measuring instruments and relay protection devices, such as voltage transformers and current transformers
Power secondary equipment
In order to protect and ensure the normal operation of electrical primary equipment, equipment that measures, monitors, controls and regulates its operating status is called electrical secondary equipment. Mainly include various measuring meters, various relay protection and automatic devices, DC power equipment, etc.
Power equipment maintenance
Power secondary equipment constitutes a system, not just the device itself, such as AC, DC, control loop, etc., because There is no monitoring method for some circuits, and real-time technical analysis and judgment on the status of the equipment cannot be carried out. Therefore, in terms of the current application status of electrical secondary equipment, strictly speaking, most protections do not meet the conditions for conditional maintenance
The planned maintenance system mostly used for power equipment in power systems has serious flaws, such as Frequent temporary maintenance, insufficient or excessive maintenance, blind maintenance, etc. make countries around the world spend huge amounts of money on equipment maintenance every year. How to reasonably arrange the maintenance of power equipment, save maintenance costs, reduce maintenance costs, and ensure high reliability of the system is an important issue for system operators. With the application of comprehensive intelligent systems such as sensing technology, microelectronics, computer software and hardware, digital signal processing technology, artificial neural networks, expert systems, and fuzzy set theory in condition monitoring and fault diagnosis, equipment condition monitoring and advanced diagnosis technology Condition-based maintenance research has been developed and has become an important research field in power systems.
Related equipment
Box-type substation, also called prefabricated substation or prefabricated substation. It’s a high pressureSwitchgear, distribution transformers and low-voltage distribution devices are factory-prefabricated indoor and outdoor compact power distribution equipment arranged according to a certain wiring plan, which organically combines functions such as high-voltage power receiving, transformer step-down, and low-voltage power distribution. Together, installed in a moisture-proof, rust-proof, dust-proof, rodent-proof, fire-proof, anti-theft, heat-insulated, fully enclosed, movable steel structure box, mechanical and electrical integration, fully enclosed operation, especially suitable for urban network construction and transformation , is a new type of substation that has emerged after the civil engineering substation. Dongfang Chuneng box-type substation is suitable for mines, factories, enterprises, oil and gas fields and wind power stations. It replaces the original civil distribution rooms and distribution stations and becomes a new complete set of power transformation and distribution devices.
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