With the gradual implementation of the ten major industry revitalization policies, the demand and application fields of relais 12v will continue to develop and grow. Traditional electromechanical relays will grow at a rate of about 8%, and the development rate of solid state relays will remain at about 15%. Special relays will develop rapidly at a rate of more than 20%. According to statistics, my country's relay industry has huge market potential, and my country's relay industry has the following development directions and characteristics.

　　
1. Has the characteristics of high industry barriers

Power equipment is divided into primary equipment and secondary equipment. Primary equipment refers to equipment that directly undertakes the functions of power generation, transmission, transformation, distribution, and power consumption, such as generators, transformers, etc., with low technical content and many domestic manufacturers. The competition is fierce. Secondary equipment refers to the various equipment required for the normal operation of primary equipment and the realization of electricity management goals, such as generator set protection and dispatch automation systems. Compared with the same secondary equipment, the production of secondary equipment has higher industry barriers. The products of this industry bring together modern electronic technology, communication technology, computer and network technology, with higher technical content and high added value, which is a typical high Technology industry. Although my country's relay industry has achieved remarkable results after years of development, there are still very few domestic companies capable of producing secondary equipment.

2. Microcomputer protection is the development direction

The technological development of relais 12v is inseparable from the technological development of electronics, information, and communication. In the future, with the gradual application of electronic CT (current transformer) and PT (voltage transformer), and the further improvement of the IEC61850 standardization protocol, it is foreseeable that digital technology will be more widely used. Electronic CT and electronic PT with voltage levels of 110 kV and 220 kV have been put into trial operation in China. The development of relay protection equipment suitable for electronic CT and PT will promote the development of relay protection technology and drive the relay The transformation of new protection principles, new technologies and new applications has become a new topic for researchers in relay protection.

3. UHV relay technology is a challenge

The configuration, setting and coordination of relais 12v are more complicated. The development of power grid equipment and operation control technology, such as the research of digital substations, the application of unattended substations, the construction and operation of UHV grids, etc., will put forward higher requirements on the performance of relay protection technology, and it is necessary to study and propose new relays Protection solutions. The actual operation of the power grid and the lessons of power grid accidents at home and abroad have shown that a single relay protection device or a single component failure of the device may cause a power grid accident. It is still necessary to further improve the reliability of the relay protection equipment.

The UHV power grid has significant characteristics that are different from UHV power grids. At present, there are many technical problems in relais 12v, such as the impact of UHV ultra-long line capacitive current on protection characteristics, the impact of submersible current on reclosing, UHV Electromagnetic compatibility of relay protection equipment, etc. It is understood that relevant institutions in our country have carried out a series of independent research and development work and have achieved phased results.