The hottest smart appliance is an indispensable pa

2022-07-30
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Smart appliances are an indispensable part of smart electricity

1. General understanding and views on smart electricity

(1) the development focus of smart electricity in China and the United States is determined by national conditions and their own characteristics

in fact, the concept of smart electricity was put forward very early. After President Obama put forward it, smart electricity has attracted extensive attention all over the world. Each country has different reasons and priorities for developing smart electricity, which is determined by its own characteristics and needs. On the one hand, the development of smart electricity in the United States is due to the needs of electricity transformation and the financial crisis, which provides huge business opportunities for enterprises in order to promote economic development; On the other hand, there is also a demand for energy conservation. Their smart power focuses on the user end, especially how to realize power management and power saving in the application of intelligent instruments

the concept proposed by China is a strong intelligent electricity with UHV as the core, which is also based on the characteristics of China. Most of China's hydropower, oil, coal and other energy sources are concentrated in the western region, and the western region may also be rich in wind energy resources. The electricity generated in the West cannot be used, but the electricity is mainly used in the East. The transmission distance is at least twoorthree kilometers, and at most fourthousand kilometers. In this case, UHV transmission is required. Due to the needs of development and the lack of foreign attention to UHV and UHV related equipment, testing and standards, China has taken the lead in this field in the world in recent years. According to our characteristics, China's smart electricity is a strong smart electricity with UHV as the core

(2) the concept of intelligent electricity should include the intelligentization of electrical equipment

electricity is composed of five parts: power generation, transmission, transformation, distribution and power consumption. Without any link, it can not be called complete electricity. Most of the electric energy is consumed at the user end. In the past, there were statistical data on low-voltage electrical appliances. More than 80% of the electric energy was consumed through low-voltage electrical appliances. Statistics are also available in the motor industry. 57% of the electric energy is consumed by the motor. Of course, some of it is consumed at the high-voltage end. Since so much electric energy is mostly consumed at the low-voltage side, and most of it is consumed through low-voltage electrical transmission, if we don't care about the electricity situation at the user end and ignore this part of energy conservation and energy management, then this kind of intelligent electricity is not complete in a sense

at present, there are many opinions on the definition of intelligent electricity, most of which are physical electricity plus advanced information and control technology. In my opinion, the above definition can not fully reveal the profound connotation of smart electricity. At least the main electrical equipment in electricity, including power generation, transformation, transmission, distribution and consumption, should be intelligent, so that electricity can become a real smart electricity. Of course, some people may say that applying advanced information and control technology to these devices is intelligence, but I don't think it's accurate. What I want to say is that many automation workers can do with current information and control technology, but it doesn't mean that electricity will become intelligent electricity if these technologies are used in electricity. If the electrical equipment is not intelligent and only focuses on intelligent control, the intelligent function of the intelligent electricity will be very weak, at least the function is very incomplete. So I think smart electricity should at least cover the idea that the main equipment (such as power generation equipment, substations, high-voltage switchgear, low-voltage switchgear, low-voltage complete sets, instruments, metering and other equipment) for power generation, transformation, transmission, distribution and consumption in electricity should be intelligent. Such electricity is the real smart electricity. If the instruments are not intelligent, low-voltage appliances or traditional low-voltage appliances, This will be far from constituting smart electricity

(3) the promotion of smart electricity should pay attention to the work of the user end

China's smart electricity is in the overall responsibility of the national company, and it is very appropriate for the national company to undertake this task. However, I think the problem now is how to care about the user end as much as the ultra-high voltage electricity. Most of the standards and plans being formulated now focus on power transmission and transformation. Many demonstration projects have been started or are in the process of implementation. However, the intelligent electrical equipment developed by our country is not used much. Most of the electrical equipment used now are the products of foreign manufacturers. In fact, the development of intelligent electrical appliances in China has kept up with the development trend of the world and can basically meet the requirements of intelligent electrical demonstration projects

at the high level Forum on technological progress and smart electricity held in Wenzhou in September 2009, someone once proposed that smart electricity should be built from top to bottom or from bottom to top? I think this problem is particularly good. The United States must be from the bottom up, but what about China? At that time, someone proposed that it should be from bottom to top. The chief engineer of China Electric Power Research Institute said that it should be combined from top to bottom. I think the combination of top and bottom is very good, but I am afraid that I only care about the above things and ignore the following (client) things in actual operation

Shanghai Electric Appliance Research Institute (Group) Co., Ltd. has done a lot of work in smart power users and reported to Shanghai municipal government leaders and relevant departments for many times. For Shanghai, ultra-high voltage and power transmission are certainly not the key points. Shanghai focuses on Intelligent substations, power storage, new energy systems, and smart power users. We have participated in several symposiums in Shanghai. Chen Ping, President of Shanghai Institute of Electrical Science (Group) Co., Ltd., yintiantian, assistant to the president, and relevant experts have introduced in detail the large amount of work we have done on the user side. The city leaders attach great importance to it. The senior leaders of the group also organized a group to communicate with China Electric Power Research Institute in Beijing, hoping that under their unified leadership and planning, they would do a good job in the work of intelligent power users, combine with each other, and list the planning and standards in the field of intelligent power low voltage into the overall planning and standards. This work is crucial. If we do not do it now, we will not be able to keep up with the overall development requirements of smart electricity

2. Low voltage electrical appliance enterprises should be able to provide intelligent power distribution and overall solutions at the user end, as well as the main intelligent low-voltage electrical appliances, in order to be competitive in the era of intelligent electricity.

first of all, we have talked about the impact of the development of intelligent electricity on the low-voltage electrical appliance industry for a long time. In the past, low-voltage electrical appliances are single products, rarely considered from the perspective of system, while large foreign companies develop low-voltage electrical appliances from the perspective of system, Otherwise, there will be many problems in the application. Therefore, with the proposal and development of intelligent electricity, enterprises and workers of low-voltage electrical appliances should realize that the development of low-voltage electrical appliances in the future should first be considered from the perspective of system development, and this concept should be firmly established

second, we should not only provide a single product, but also provide an overall system solution. We see that large foreign companies, such as Siemens, have long had overall solutions for the control system. Schneider also has solutions in the field of power distribution and control. After they receive the project, they can solve the problems from the system to all power distribution, protection and control components, from strong current to weak current. However, domestic enterprises usually fight alone, which is problematic and leads to the inability to bid for projects. Especially after the implementation of smart electricity in the future, the power system will be networked. If an enterprise can only provide a single component and cannot provide a complete solution, the price of recycled waste plastics is much cheaper than the rising price of plastic raw materials in recent years, then the enterprise will not be competitive in the future market competition

third, in addition to the overall solution, it can also provide key and major intelligent electrical products. The products must be high-level and have independent intellectual property rights. Only in this way can they be competitive. Many enterprises can provide system solutions, but if there are no key components with independent intellectual property rights and characteristics other than system solutions, the competitiveness is not strong

3. Smart electricity will provide an opportunity for the promotion of the fourth generation of low-voltage electrical appliances in China. On the contrary, the application of the new generation of products can also improve the reliability of smart electricity.

the fourth generation of low-voltage electrical appliances in China should first have the following characteristics: the performance is leading domestically and internationally, and some indicators should be leading internationally. Generally speaking, it should reach the same level as foreign contemporary products. Not only the performance indicators are similar, but also the new technologies related to low-voltage electrical appliances in recent years should be applied to the new generation of products. Through the application of new technology, the performance of the product will be improved, rather than improved, improved and surplus on the basis of the original product. At present, many enterprises are making improvements on the third generation products. We know that improvements can also improve performance, but to some extent, they are eating up surplus, which will affect product reliability

why is our DW45 so well promoted? Mainly very reliable. The new generation products are not improved by improving the old products to improve the indicators, but by the application of new technologies. The reliability is higher than that of the previous generation products. These problems were taken into account in the design. The implication is that the new products can reach this level now and have higher reliability, so there is room for further improvement of the performance of the new generation products in the future. In addition to the advanced performance of the new generation of products, many new functions have been added, such as the low-voltage circuit breaker. We now put forward the concept of full range selective protection, which is a new technology and a major leap for the distribution system. The original selective protection is local selective protection, which is realized by short delay. If the setting current exceeds the short delay, it is difficult to realize selective protection. We now propose that selective protection can be realized in the full range, including the full current range. There is also system scope. At present, the terminal in the distribution system is difficult to achieve effective selective protection because there is no switch with selective protection. Now our fourth generation product has a miniature circuit breaker with selective protection, expanding the scope of selective protection from the general distribution system to the end users, which is a full range and regional selective protection. This requires many new technologies, such as regional selective interlocking technology. In case of system fault, first judge the short-circuit fault position, then quickly disconnect the circuit breaker at the short-circuit position and send a locking signal to the superior circuit breaker. The ultimate purpose is to trip the circuit breaker where the short-circuit fault occurs and lock other circuit breakers, so as to ensure that the short-circuit fault is limited to the minimum range and prevent skip tripping. This can greatly improve the reliability of power supply. In addition, after the new technology is adopted, the whole selective protection can be realized in 200ms. It significantly reduces the short-time withstand current requirements of low-voltage circuit breakers and helps to further improve the breaking performance of circuit breakers. At the same time, it can effectively reduce the dynamic and thermal stability requirements of low-voltage complete sets of equipment until the system, which is of great benefit to the miniaturization, material saving and energy saving of complete sets of equipment and systems, and the performance can be further improved. This is the effect of the application of the new technology we are talking about

in addition to the above requirements, the fourth generation products emphasize on independent development and independent intellectual property rights. In the past, the R & D of products may imitate many ingredients. Our generation of products should completely get rid of the Imitation Based

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