With the development of the smart grid construction, the relay protection of the power system has received more and more attention, and the application research of relay protection in the smart grid is very necessary. Anhui Derun Electric Technology Co., Ltd. is a manufacturer specializing in the production of high and low voltage switch cabinets. The relay protection device is an indispensable part of the high voltage switchgear. When the power system components (such as generators, lines, etc.) In the event that a failure of the power system itself endangers the safe operation of the power system, a warning signal can be sent to the on-duty personnel in a timely manner, or a tripping command can be issued directly to the controlled circuit breaker to terminate the automated measures and equipment for the development of these events. The complete set of equipment that realizes such automation measures is generally called a relay protection device. The following DeRun Electric analyses the smart grid relay protection technology. Since the reform and opening up, China's economy has made great progress, the traditional power grid has been unable to meet the needs of customers. In this context, smart grid came into being. The strategic objectives put forward by the smart grid are: based on the UHV grid as the backbone grid, and the strong grid with coordinated development of the grids at all levels, using modern information technology and automated control technologies to build information, automation, mathematics, and interactive features. Strong smart grid. The proposal of this strategic goal means that the new substations in the future must be built with new standards, and the old substations should also be transformed accordingly. This puts forward more and higher requirements for relay protection. Although the current relay protection technology adapts to the needs of the smart grid within a certain period of time, it is not the latest trend technology and is facing increasing pressure. In this era of opportunities and challenges, relay protection technology has a broad space for development. 1 Development Status of China's Smart Grid With the development of intelligent technology, many areas of intelligent technology have been widely used, and the national power system is one of them. The highly intelligent power grid system has brought about the improvement of grid management and service quality, and the smart grid has become the future development trend. The application of intelligent power grids is very extensive, but its technical requirements are high and the cost is huge. It has also become one of the important issues that power companies are concerned about. At present, the development prospects of smart grids are very optimistic. Various developed countries are trying to speed up the construction of the smart grid market. For example, the United States proposes smart grids to promote domestic economic growth, EU countries have formulated strategic plans for the super grid, and their ultimate goal is to drive the entire system economy. development of. Smart grids have been proposed for many years in our country, and the state attaches great importance to its development and construction. 2 Intelligent Grid Relay Protection Core Technology 2.1 Wide Area Protection Technology The information used by traditional relay protection is to protect the information of the device itself, and its limitations are very strong. With the increasingly complex operating environment of the power grid, the drawbacks of the traditional relay protection technology become more and more obvious. Therefore, building a relay protection platform with richer information becomes more important, and the wide area protection technology has become an important development direction. Wide-area protection technology has multiple information points and types, and can implement tripping strategies, open/closed protection and other functions. The wide-area relay protection is divided into relay protection and safety automatic control. It provides self-healing solutions and complex faults for the power grid system, so as to improve the adaptive capacity of relay protection. 2.2 Protection System Reconstruction Technology Relay protection reconstruction technology is one of the core technologies of intelligent power grids. Through the extremely strong self-adaptive ability, it can quickly and reconfigurably perform functional reconfigurations in the detection of explicit and recessive faults. It can identify the components that have been damaged and use Adaptation function Find replacement components to achieve restoration of relay protection functions. The relay protection system of the intelligent power grid is composed of electronic components, and the electronic components are easily burned and damaged, which in turn affects the relay protection function and makes the power system lose its protective effect. The use of reconstruction technology will be able to successfully solve this problem, so that the relay protection system plays a role at all times. The original relay protection system has not been adapted to the requirements of the development of the times. Therefore, the relay protection system must be reconstructed so as to finally meet the expected results. 3 The application of new electronic sensors Just like the computer's CPU, there is also a central control device in the smart grid, which acquires complex information data by installing sensors on each smart device. Its control surface is very wide, covering all aspects of power generation, transmission, and power transformation. Among them, electronic sensors are representative of intelligent sensing technology. The electronic sensor is installed on the smart device and transmits the data to the control center in real time, thereby providing a large amount of accurate data for the smart grid operating status, which greatly improves the performance of the relay protection system. This is not achieved by the traditional relay protection technology. 4 Influence of Smart Grid on Relay Protection Relay protection is the first and the end of the stable and safe operation of the power system. It utilizes a variety of advanced technologies such as network information technology, electronic sensing technology, digital power transformation technology, wide area measurement technology, and automatic control technology. Digital, network technology. For relay protection, to realize digitization, it is necessary to transform the traditional power grid and use advanced measurement methods and electronic information transmission technologies. With the continuous promotion of intelligent power grid equipment, electronic transformers have become the mainstream. It can convert sensory information into digital information and transmit it to protection devices and intelligent circuit breakers through the network interface, which is conducive to post-maintenance and reduces maintenance costs. . With the advent of the information age, profound changes have taken place in various fields, and changes in the power sector are also evident. The networking of smart grid systems is mainly reflected in information acquisition and information transmission. Although relay protection can be maintained through the self-healing function, if the various sites are linked together to form a whole, then more information data can be generated, thereby improving maintenance efficiency. Smart grid circuit breakers all have digital interfaces, so the information transmission channel can be changed to network transmission. This will not only improve the accuracy of information transmission, but also greatly increase the efficiency of information transmission. In short, the smart grid is an inevitable trend in the future development of the power system, and it actively pays attention to research and promotion of relay protection technologies to better play the role of a “strong smart gridâ€. 1 inch 25mm wide different length highly visible straps with reinforced edges, Small Ratchet Straps,Tie Down Straps,Ratchet Strap Pulley,Mini Ratchet Straps,Tire Tie Down Straps WINNERLIFTING SAFETY EQUIPMENT CO., LTD. , https://www.webesteu.com
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