Smart grid is an important direction for the transformation and development of power system. The connotation of smart grid is different from that of traditional grid. Smart grid refers to the timely access to complete power grid information, optimizing social energy allocation and improving the comprehensive energy investment and utilization efficiency. For the future development of power grid situation, should have the ability to use a variety of energy sources for power generation. The application of smart grid can effectively reduce the power loss of the transmission grid while improving energy efficiency and protecting the environment. 2 smart grid technology research status at home and abroad 2.1 The status of foreign research The development of smart grid has aroused widespread concern in the world. In particular, the developed countries in Europe and the United States have made rapid progress in the development of science and technology. Studies on the smart grid have been relatively early. Up to now, not only has a complete set of basic and sound development system been formed, Practice has been a large degree of application. Due to the different situations in different countries, the causes and concerns of smart grid construction are also different. We should have selective learning. In Europe, clean energy and renewable energy are vigorously developed, and the demand for power quality and power supply reliability after saturation of power demand tends to increase. The United States is focusing on the upgrade and development of the smart grid, using the current limited resources for more benefits. 2.2 Domestic research status Research smart grid started relatively late in our country, so far there is no development strategy of smart grid at the national level, but some aspects of the study or the development of smart grid has played a reference role. The characteristics of the smart grid construction of East China Power Grid Company are as follows: planning the smart grid with the goal of self-healing; realizing intelligent scheduling; full use of new materials and smart devices; friendly access of renewable energy; and intelligent interaction with users. China started a number of 863 high-tech research and development projects. During the 11th FYP, major projects and key projects were set up in the three advanced energy technologies, including: polygeneration demonstration project based on coal gasification, MW Level grid-connected photovoltaic power station system, solar thermal power generation technology and system demonstration projects. 3 smart grid technology analysis 3.1 Intelligent Communication Technology Advanced grid communication technology is the basis for ensuring the successful realization of the goal of smart grid construction. The smart grid requires real-time monitoring and analysis of system status to ensure the prediction of faults and the timely response to fault signals. By adopting smart grid communication technology, the reliability and continuity of the power grid in its power supply have also been improved, and the efficiency of utilization of the electric power equipment has also been greatly improved, so as to ensure the reliability, safety and stability of the grid operation. 3.2 Intelligent Substation Technology Intelligent substation technology is the organic integration of information processing technology and computing monitoring technology. Information sharing, intelligent equipment and intelligent control of intelligent substation is the most important technical characteristics. Smart substation technology has the following three characteristics: 3.2.1 The introduction of control Smart substation technology introduces computer terminals, much like installing a brain capable of computing power and conducting command for a substation. Through the computer terminal system can realize real-time monitoring of the operation of electrical energy, can effectively reduce substations caused by unexpected events, which is of great significance to improve the reliability of power supply. 3.2.2 equipment integration and the application of optical fiber technology Device integration is a typical feature of smart substation technology. Through the extensive promotion and application of optical fiber technology, the speed of information communication among control layers has been greatly improved. In addition, the application of optical fiber technology can effectively achieve the control of LAN station management. With the further popularization and application of computer digital technology, the equipment used for electric energy detection, control and management is also gradually integrated, and equipment control can be completed within a certain area, which not only saves the space occupied by the equipment but also effectively enables The construction period of the equipment is greatly shortened, the installation cost is reduced, and the equipment can be changed to the normal working state as soon as possible. 3.2.3 to achieve local or global intelligent control Achieving local or global intelligent control is a major advantage of smart substations. The application of optoelectronic technology has become the inevitable choice for substations. The application of optoelectronic technology has realized the intellectualization of the current lock-up device, current transformer and control cabinet. With the application of optoelectronic technology, the local control cabinet in a device can evolve into a miniature GIS system. By installing a high-voltage current blocking device and an intelligent current mutual inductance device with a leakage blocking function and an automatic control function in a secondary device, the situation that some minor faults in the power grid are not easily found can be effectively solved. 4 smart grid technology in the future In the near future, the construction of smart grid will cover many aspects and the informationization of smart grid will permeate into it. Combined with the related technical data of smart grid, the future of smart grid is summarized as follows: the MAS-based distribution coordination and adaptive smart grid control; the system integration of distributed energy; the smart grid architecture; the rapid simulation decision-making Smart grid technologies and smart grid systems based on integrated knowledge-based decision support. 4.1 MAS-based distribution coordination and adaptive smart grid control In recent years, the MAS system is used more and more frequently. The MAS system is what we usually call a multi-agent system. The system scalability is very strong, can effectively interconnect and interoperate legacy systems, therefore, the system can maximize the protection of user resources. The MAS system is in the field of artificial intelligence research more direction, its application prospects in the smart grid will also be more and more. 4.2 Distributed Energy System Integration Smart Grid Architecture The three major components of distributed energy are distributed energy storage, distributed generation and demand-side load response resources with potential power product value respectively. These three belong to the category of electricity, with a very large link. For example: distributed generation and distributed energy storage constitute a complementary function of the micro-grid, and can participate in demand response resources load response procedures. 4.3 rapid simulation decision-making smart grid technology The rapid simulation decision-making based on incident response is different from the static security analysis and security countermeasure of the traditional preventive control. It also develops more than the dynamic security assessment composed of the wide area measurement system based on PMU, and mainly increases the real-time Predict function to provide emergency for dispatchers Stainless Steel Plate Cutting Mchine 1. It can be cut and processed, with high production efficiency, high speed, no deformation of the machined surface, no burr, especially suitable for occasions with high welding quality and efficiency requirements.
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2. Wide range of applications.
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4. Wide range of applicable sizes
5. Multi-cut technology, the pipe is stationary, the tool rotates, and the safety performance is high.
6. With temperature rise protection, long motor life
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8. The main motor adopts constant speed feedback regulation, and the process of cutting the groove is stable.
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