The development of smart appliances in our country has been nearly 20 years, and the development of communicable electric appliances has also been nearly 10 years. The first time I proposed the development of communicable low-voltage electrical appliances was a large-scale industrial conference attended by more than 200 people in 1998. At that time, I issued a report entitled “Status and Development Trend of Low-voltage Electrical Appliances in China†on behalf of the Electrical Substation. Communication electrical concept. In 1999, we proposed in the industry the use of communicable electrical appliances as one of the main features of our fourth-generation products. We have been developing communicable low-voltage electrical appliances since 2000, and it has been nearly 10 years since. It can be said that the development of smart electric appliances and communicable electric appliances in China has kept pace with the development of the world. The main products of China's third-generation low-voltage electric appliances have been realized intelligently and communicably. Of course, these functions must be further improved and strengthened.
Main reasons: First, related standards are not perfect; Second, the industry segmentation problem, components and complete sets of industry ideas are different, the network can not only be in the low-voltage power grid, but also with the medium-voltage system network, but various industries are difficult to unify the idea, everyone The networks used are not the same and cannot form a concerted effort, resulting in an unsatisfactory network system for distribution systems.
Low-voltage electrical companies must be able to provide intelligent distribution network and customer-end solutions and mainly intelligent low-voltage electrical appliances in order to be competitive in the era of smart grids. The smart grid will provide an opportunity for the promotion of the fourth-generation low-voltage electrical products in China. Conversely, the application of a new generation of products will also improve the reliability of smart grids.
First of all, we talked about the impact of smart grid development on the low-voltage electrical industry, we have talked for a long time, in the past to do low-voltage electrical appliances are a single product, very few to consider from the system perspective, while foreign companies develop low-voltage electrical appliances from the system point of view , otherwise there will be many problems when applying. Therefore, with the introduction and development of smart grids, low-voltage electrical companies and workers must realize that the development of low-voltage electrical appliances in the future must first be considered from the perspective of system development, and this concept must be firmly established.
Second, we cannot provide only a single product and we must be able to provide a total system solution. We look at foreign companies, such as Siemens, which has long had an overall solution for control systems. Schneider also has solutions in the field of power distribution and control. After they receive the project, they go from the system to all components for power distribution, protection, and control. From strong to weak electricity can be solved. Domestic companies usually go it alone, which is problematic, and ultimately leads to no ability to bid for the project. In particular, after the implementation of the smart grid in the future, the power system will be networked. If the company can only provide a single component and cannot provide a complete solution, this enterprise will not be competitive in the future market competition.
Third, besides the overall solution, it can also provide key and major smart electrical products. Products must be of high quality and have independent intellectual property rights so that they can be competitive. System solutions Many companies can do it, but if there is no key, independent intellectual property, and unique components other than system solutions, then the competitiveness is not strong.
China's fourth-generation low-voltage electrical products must have such characteristics as the first: performance is the leading domestic and international advanced, some indicators but also the international leader, popular speaking is to achieve the same level with foreign contemporary products. Not only similar performance indicators, but also in recent years, low-voltage electrical technology related to the new generation of products. Through the application of new technology, to improve the performance of the product, rather than on the basis of the original product improvement, improvement, and the allowance. At present, many companies are improving on the third generation of products. We know that improvement can also improve performance, but to some extent, it is to eat more, which will affect product reliability.
Why is our DW45 promotion so good? Mainly very reliable. The new generation of products is not improved by improving old products. It is improved through the application of new technologies. The reliability is higher than that of the previous generation. These problems are taken into consideration in designing. The implication is that new products are now available. Can achieve such a level, and have higher reliability, so that the performance of the new generation of products will have room for further improvement in the future. In addition to advanced performance of the new generation of products, there are many new features to join, such as low-voltage circuit breakers, we now propose a full range of selective protection, is a new concept, this is a new technology, is a major for the distribution system leap. The original selective protection is local selective protection, achieved through short delay, if it exceeds the short delay setting current, it is difficult to achieve selective protection. What we are now proposing is the full range, including full current range for selective protection. There is also a system scope. Currently, there is no switch with selective protection in the power distribution system, and it is difficult to achieve effective selective protection. Now our fourth-generation product has a miniature circuit breaker with selective protection, which selectively protects The range extends from the general distribution system to the end user and is a full-range, full-area selective protection. This requires the use of many new technologies, such as regional selective interlocking technology. When a fault occurs in the system, the short-circuit fault location must first be determined, and then the short-circuit breaker should be disconnected quickly. At the same time, the upper-level circuit breaker should issue a blocking signal. The ultimate purpose is to trip the circuit breaker where the short-circuit fault occurs, and to lock other breakers. Short-circuit faults are limited to the minimum range, preventing step-by-step tripping. This can greatly improve the reliability of power supply. In addition, after the new technology is adopted, the entire selective protection can be realized within 200 ms. It makes the short-circuit withstand current requirement of the low-voltage circuit breaker significantly reduced, and helps to further improve the breaking performance of the circuit breaker. At the same time, it can effectively reduce the requirements for dynamic and thermal stability of low-voltage complete sets of equipment up to the system, greatly benefiting the miniaturization, material saving, and energy saving of complete sets of equipment and systems, and the performance can be further improved. This is what we call the new technology application. Effect.
In addition to the above requirements, the fourth generation of products emphasizes the independent development of products and independent intellectual property rights. In the past, product research and development may have more imitation components. Our generation of products must completely get rid of the imitation-oriented state, emphasize independent development, independent innovation, and independent intellectual property rights. Therefore, this generation of products must not only have many new technology applications, but also There are many innovations in the structure. Structural innovation is not only the accumulation of past experience, but mainly uses a lot of advanced design techniques, such as simulation and advanced testing technology. It creates conditions for independent innovation and structural innovation. Therefore, this generation of products is very different from the previous three generations of products. .
At the same time, the fourth generation of products will be further improved in terms of intelligent functions, especially after the smart grid is proposed now, the requirements for smart appliances are even higher. Our products must fully meet the requirements of smart grids, and smart features must be more powerful than previous products, and environmental protection, energy conservation, and other factors must also be considered. Therefore, it is required that the fourth-generation product be of a high level and has a larger leap than the original product, which is also a product that meets the requirements of the smart grid. When it comes to the promotion of the fourth generation of products, due to the advanced level of technology and the relatively high cost of the corresponding products, the development units are worried about their promotion issues. Smart grids now provide opportunities for new-generation product applications. Although the cost of new products is higher, they can better meet the requirements of smart grids and have more realistic meaning for improving smart grid function and operational reliability. It gives a new generation of products. The promotion brings great opportunities.
Main reasons: First, related standards are not perfect; Second, the industry segmentation problem, components and complete sets of industry ideas are different, the network can not only be in the low-voltage power grid, but also with the medium-voltage system network, but various industries are difficult to unify the idea, everyone The networks used are not the same and cannot form a concerted effort, resulting in an unsatisfactory network system for distribution systems.
Low-voltage electrical companies must be able to provide intelligent distribution network and customer-end solutions and mainly intelligent low-voltage electrical appliances in order to be competitive in the era of smart grids. The smart grid will provide an opportunity for the promotion of the fourth-generation low-voltage electrical products in China. Conversely, the application of a new generation of products will also improve the reliability of smart grids.
First of all, we talked about the impact of smart grid development on the low-voltage electrical industry, we have talked for a long time, in the past to do low-voltage electrical appliances are a single product, very few to consider from the system perspective, while foreign companies develop low-voltage electrical appliances from the system point of view , otherwise there will be many problems when applying. Therefore, with the introduction and development of smart grids, low-voltage electrical companies and workers must realize that the development of low-voltage electrical appliances in the future must first be considered from the perspective of system development, and this concept must be firmly established.
Second, we cannot provide only a single product and we must be able to provide a total system solution. We look at foreign companies, such as Siemens, which has long had an overall solution for control systems. Schneider also has solutions in the field of power distribution and control. After they receive the project, they go from the system to all components for power distribution, protection, and control. From strong to weak electricity can be solved. Domestic companies usually go it alone, which is problematic, and ultimately leads to no ability to bid for the project. In particular, after the implementation of the smart grid in the future, the power system will be networked. If the company can only provide a single component and cannot provide a complete solution, this enterprise will not be competitive in the future market competition.
Third, besides the overall solution, it can also provide key and major smart electrical products. Products must be of high quality and have independent intellectual property rights so that they can be competitive. System solutions Many companies can do it, but if there is no key, independent intellectual property, and unique components other than system solutions, then the competitiveness is not strong.
China's fourth-generation low-voltage electrical products must have such characteristics as the first: performance is the leading domestic and international advanced, some indicators but also the international leader, popular speaking is to achieve the same level with foreign contemporary products. Not only similar performance indicators, but also in recent years, low-voltage electrical technology related to the new generation of products. Through the application of new technology, to improve the performance of the product, rather than on the basis of the original product improvement, improvement, and the allowance. At present, many companies are improving on the third generation of products. We know that improvement can also improve performance, but to some extent, it is to eat more, which will affect product reliability.
Why is our DW45 promotion so good? Mainly very reliable. The new generation of products is not improved by improving old products. It is improved through the application of new technologies. The reliability is higher than that of the previous generation. These problems are taken into consideration in designing. The implication is that new products are now available. Can achieve such a level, and have higher reliability, so that the performance of the new generation of products will have room for further improvement in the future. In addition to advanced performance of the new generation of products, there are many new features to join, such as low-voltage circuit breakers, we now propose a full range of selective protection, is a new concept, this is a new technology, is a major for the distribution system leap. The original selective protection is local selective protection, achieved through short delay, if it exceeds the short delay setting current, it is difficult to achieve selective protection. What we are now proposing is the full range, including full current range for selective protection. There is also a system scope. Currently, there is no switch with selective protection in the power distribution system, and it is difficult to achieve effective selective protection. Now our fourth-generation product has a miniature circuit breaker with selective protection, which selectively protects The range extends from the general distribution system to the end user and is a full-range, full-area selective protection. This requires the use of many new technologies, such as regional selective interlocking technology. When a fault occurs in the system, the short-circuit fault location must first be determined, and then the short-circuit breaker should be disconnected quickly. At the same time, the upper-level circuit breaker should issue a blocking signal. The ultimate purpose is to trip the circuit breaker where the short-circuit fault occurs, and to lock other breakers. Short-circuit faults are limited to the minimum range, preventing step-by-step tripping. This can greatly improve the reliability of power supply. In addition, after the new technology is adopted, the entire selective protection can be realized within 200 ms. It makes the short-circuit withstand current requirement of the low-voltage circuit breaker significantly reduced, and helps to further improve the breaking performance of the circuit breaker. At the same time, it can effectively reduce the requirements for dynamic and thermal stability of low-voltage complete sets of equipment up to the system, greatly benefiting the miniaturization, material saving, and energy saving of complete sets of equipment and systems, and the performance can be further improved. This is what we call the new technology application. Effect.
In addition to the above requirements, the fourth generation of products emphasizes the independent development of products and independent intellectual property rights. In the past, product research and development may have more imitation components. Our generation of products must completely get rid of the imitation-oriented state, emphasize independent development, independent innovation, and independent intellectual property rights. Therefore, this generation of products must not only have many new technology applications, but also There are many innovations in the structure. Structural innovation is not only the accumulation of past experience, but mainly uses a lot of advanced design techniques, such as simulation and advanced testing technology. It creates conditions for independent innovation and structural innovation. Therefore, this generation of products is very different from the previous three generations of products. .
At the same time, the fourth generation of products will be further improved in terms of intelligent functions, especially after the smart grid is proposed now, the requirements for smart appliances are even higher. Our products must fully meet the requirements of smart grids, and smart features must be more powerful than previous products, and environmental protection, energy conservation, and other factors must also be considered. Therefore, it is required that the fourth-generation product be of a high level and has a larger leap than the original product, which is also a product that meets the requirements of the smart grid. When it comes to the promotion of the fourth generation of products, due to the advanced level of technology and the relatively high cost of the corresponding products, the development units are worried about their promotion issues. Smart grids now provide opportunities for new-generation product applications. Although the cost of new products is higher, they can better meet the requirements of smart grids and have more realistic meaning for improving smart grid function and operational reliability. It gives a new generation of products. The promotion brings great opportunities.
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