In recent years, continuous input of microcomputer relay protection, and relay protection as a safe and stable operation of the power system, the previous test standards have gradually become unsuited to the development of today's system, so we have to find a more complete testing methods to ensure that System comprehensive, accurate relay protection test, so as to ensure the safety of the entire power system.
This article will focus on the role of relay protection in the power, at the same time proposed how to strengthen its protection measures.
The basic requirements of relay protection: relay protection should meet the reliability, selectivity, sensitivity and speed requirements. Reliability refers to the relay protection device within the scope of protection should be reliable action, in normal operation, the action should not be reliable without action. Fast motion refers to the protection device should be cut off short-circuit fault as soon as possible to reduce the extent of damage, refers to the protection device should be cut off short-circuit fault as soon as possible, the purpose is to improve system stability, reduce the damage of faulty equipment and lines, reduce fault coverage, Improve automatic reclosing and backup equipment automatically into effect.
How to strengthen the power system relay protection methods and measures:
1. Coordination and protection of personnel and improve the rules and regulations
In the relay protection, scheduling, following insurance, operators will be involved. The three parties must be proud to be consistent and united in thinking. So that tripartite cooperation between staff awareness and new protection to keep up with the same job, the same goal. In addition, according to the characteristics of relay protection, it is necessary to improve and perfect the rules and regulations for the operation and management of protection devices. Relay protection equipment, accounting, operation and maintenance, accident analysis, periodic verification, defect processing and other files should be gradually adopted computer management tracking inspection, strict examination, the implementation of rewards and punishments. Effectively promote the relay protection work. At the same time, the power system should strengthen the rewards and punishments for the relay protection work in the management. It is suggested that awards such as the annual relay protection professional labor competition prize be set up and rewards be formulated to enhance the sense of honor and responsibility of relay workers.
2. Pay attention to low-voltage distribution line protection
In our country, whether it is the distribution network in the city or rural distribution network, it is generally based on the 10kV voltage level, but the structural characteristics of the 10kV distribution line are inconsistent. At the same time, it should also be based on the general power grid protection configuration and operating experience, the use of standardized protection setting calculation method, all situations can be calculated, generally meet the requirements.
3. The implementation of intelligent relay
In recent years, artificial intelligence technologies such as neural networks, genetic algorithms, evolutionary programming, fuzzy logic and so on have been applied in all fields of power system, and the application in the field of relay protection is also gradually started. In the new era, computer networks, as information and data communication tools, have become the technical backbone of the information age. They have a profound impact on various industrial fields and also provide powerful communication means for various industrial fields.
In summary, the relay protection, we must take full account of the various factors according to the principle, in order to ensure that the relay protection action is not mismatched, not the more level. After the operation in the process of problems, the system to conduct a comprehensive and careful analysis.
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