With the rapid growth of computer hardware, microcomputer protection hardware is also improving. At present, a microcomputer device with integrated protection, control and measurement based on 32-bit digital signal processor (DSP) has been successfully developed and put into use. Using 32-bit microcomputer chip, not only the precision is greatly improved, but also the integration is high, the working frequency and calculation speed are high, the storage space is large, the instruction system is rich and there are many input/output interfaces. The persistent storage space of information and data, fast data processing ability, powerful communication function, and the ability to share the whole system data, information and network information with other protection, control devices and dispatchers require the microcomputer protection device to have the function equivalent to a PC. Nowadays, industrial computers, which are very similar to microcomputer protection devices, have made great progress in function, speed, storage capacity, reliability and so on, and their costs are also decreasing. Therefore, it is ripe to adopt a complete set of industrial computers as relay protection devices, which will be one of the future development goals of microcomputer protection.
Second, contacts.
As a tool for information and data exchange, computer network has become the technical pillar of the information age, which has a profound impact on various industrial fields and also provides a powerful means of communication for various industrial fields. Traditional relay protection is very professional, characterized by "pre-setting, real-time action and periodic inspection", and rarely touches on such issues as periodic self-inspection, remote monitoring, information sharing, dynamic modification and setting value of components or systems. The concept of system protection has long been put forward abroad, which mainly refers to the safety automatic device at that time, but it is also applicable to relay protection. The role of relay protection should not only be limited to cutting off faulty components and limiting the scope of accidents (this is of course its main mission), but also ensure the safe and stable operation of the whole system. This requires each protection unit to share the information of normal operation and fault of the whole system, and networking a large amount of information on this basis is also very beneficial. The more information the relay protection device can obtain about the system, the more accurate the judgment of fault nature, fault location and fault distance, and the higher the sensitivity, selectivity and reliability of the action. Therefore, the networking of microcomputer protection devices can greatly improve the performance of relay protection, which is the inevitable trend of the development of microcomputer protection.
Third, integration.
In the late 1980s and early 1990s, with the appearance of transmitter RTU, the protection device is actually a high-performance and multifunctional computer. It can obtain all the information and data during normal operation and failure of the system, calculate and judge on the basis of the obtained data, and transmit the results to the control center or any terminal through the intermediate network. Therefore, each microcomputer protection device can not only complete the traditional relay protection function, but also complete the functions of measurement, control and data communication under the normal operation of the system, that is, the integration of protection, control, measurement and data communication of the device is realized.
Fourth, intelligence.
In recent years, artificial intelligence has been applied in various fields of power system, and its application research in the field of protection devices has also begun. These artificial intelligence algorithms have the ability to solve complex problems. If these artificial intelligence are properly linked, the operation speed can be faster. It can be predicted that artificial intelligence technology will be more and more widely used in the field of relay protection to solve problems that are difficult to be solved by conventional methods. World-famous automation system suppliers constantly bring forth the old and bring forth the new, and have developed many excellent platforms for microcomputer relay protection devices. Different from the general CPU, DSP is a microprocessor with a special structure for fast operation. In view of this, a new microcomputer relay protection device based on DSP is developed at home and abroad to further improve the comprehensive automation level of substation.