江 西 威 齐 电 器 有 限 公 司
Jiangxi Weiqi Electrical Appliance Co.,Ltd.
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General situation and status of relay industry

2015-04-13 00:00

In mid 60s, people put forward the idea of relay protection with a small computer, but the computer is expensive at that time, but also unable to meet the requirements of the relay protection technology, therefore has no practical application in the protection, but it started a lot of research method and program structure of relay protection calculation machine theory, laid the theoretical foundation for the later development of relay protection.

In the early and mid 70s, computer technology has made a major breakthrough, the rapid development of largescale integrated circuit technology, the micro processor and microcomputer into the practical stage. The sharp decline in the price, reliability, the speed of operation greatly improved, prompting the research of computer relay protection appeared garbage. In the late 70s, there appeared a relatively perfect microcomputer protection prototype, and put into trial operation of the power system.

In 80s, the microprocessor protection has become more and more mature in hardware and software technology, and has been applied in some countries.

In 90s, the relay protection technology of power system has developed into the era of microcomputer protection, which is the fourth generation in the development of relay protection technology.

The research of microcomputer protection in our country started in the late 1970s and early 80s, although it started late, but because of the efforts of the relay protection workers, the progress is very fast.

After 10 years of struggle, by the end of the 80s, computer relay protection, especially the transmission line microcomputer protection has reached a large number of practical degree. In the process of the research of computer relay protection in our country, colleges and universities play a leading role.

From the perspective of China's relay applications, communications and industrial control, home appliances and cars are still the largest relay market. According to the relay market survey report shows that the largest demand is a generalpurpose relay, especially high sensitivity, small, ultra small PCB relays, small power relays, etc.. Judging from the market situation, the relay is a large, wide range of services, technical content is not high, meager profits, the market potential of the larger industry.

Although the relay industry in our country has experienced decades of development, but the overall level of products and the world's advanced level there is still a big gap, mainly for these:

(1)The design level is low, the military products are few, the environmental adaptability is poor, and the reliability level is low, which can not meet the requirements of weapon equipment and high technology operation. Universal relay poor quality, slow replacement of varieties, high-end product market share is low, can not meet the needs of domestic and international markets, can not completely replace imports.

(2)The ability of independent development and innovation is low: the research on generic technology is not deep and wide, the technical force is not fully utilized, and the supporting technology is weak(3)The production technology is backward, the level of automation is low, the ability of process control is worse, which seriously affects the consistency and reliability of product quality, and makes the service cost increase.

(4)The management level is low, the management personnel's comprehensive quality is low, the management pattern is obsolete, especially the management thought change is slow, and does not adapt to the technical development.

(5)CAD is still in the low level application, CAM and CAT in the initial stage, the product development cycle is long, and the whole machine replacement fast requirements are not suitable. The application of the material can not keep up with the development of relay technology.

(6)Material failure physics analysis is not wide is not deep; domestic material less varieties, no key materials such as flame retardant plastics manufacturer, fine line and installation of pressure sensitive tape still need to import materials; to adapt to the requirements of the relay equipment reform is backward and incomplete, especially the rolling material. Testing techniques and methods need to be improved and perfected.