Actively research the analysis of smart grid subscribers

Yin Tianwen is one of the leading figures in China's low-voltage electrical industry and is also a leader in the field of smart low-voltage electrical appliances, intelligent network communications, and lightning protection technologies in China. The Electrical Branch of Shangke Institute, which he led, is the technical focal point unit of China's low-voltage electrical industry. It has long guided the development direction of scientific research and new product development in China's low-voltage electrical industry, and has made outstanding contributions to the development of low-voltage electrical appliances in China.

Low-voltage electrical appliances are an important basic component product with a wide range of outputs and are responsible for the distribution and control of most of the electrical energy. At present, with the attention of the attention paid to the attention of smart grids, the low-voltage electrical appliance industry, which is closely connected with the power industry, is facing development opportunities. How can low-voltage electrical appliances meet the needs of smart grid construction? With this problem, the reporter interviewed Yin Tianwen, assistant to the president of the Shanghai Institute of Electrical Science and Technology (Group) Co., Ltd., and director of the electrical division.

The relationship between smart grids and low-voltage electrical appliances is a problem we have been exploring. Yin Tianwen introduced that China’s smart grid is based on the UHV backbone network, including ultra-high voltage, ultra-high voltage, transmission and substation, high and low voltage distribution, and user terminals. The highest degree of relevance to us is customer-side power distribution. The most important control and protection device in customer-side power distribution is low-voltage electrical appliances, so smart grids are closely related to low-voltage electrical appliances. According to statistics, 80% of the energy is consumed by the user-side power equipment. The importance of the client is evident. It is a very important part of the smart grid.

In the development planning of China's smart grid, there are already some contents on low-voltage power distribution and user-end, but it is still not specific enough. Yin Tianwen pointed out that at present, we are actively researching the key technologies of smart grid user terminals and drawing up a smart grid user-end implementation roadmap.

So far, Shanghai Science and Technology Institute has conducted a preliminary study on the work of the smart grid user end, and put forward ideas. We hope to cooperate with relevant units to incorporate the planning and standards of the smart grid low voltage sector into the overall planning and standards. Yin Tianwen stressed that the client's work is critical, and if it is not done now, it will not keep up with the overall development requirements of the smart grid.

After sorting out, Yin Tianwen believes that the overall architecture of the client is divided into three major systems: smart appliances and systems, energy management systems, and intelligent building systems.

First, smart appliances and systems are highly intelligent with functions such as two-way communication, fault pre-judgment and warning, load monitoring, full-current range selective protection, power quality monitoring, realizing regional interlocking, and quick and safe recovery. Electrical equipment and systems are basic electrical equipment and systems that constitute the user's intelligent distribution network and even the entire low-voltage distribution network.

In the three major systems, the basic work of China's smart electrical appliances and systems is the best. Yin Tianwen introduced that China began to develop intelligent low-voltage electrical appliances from the third generation of low-voltage electrical product development, and then developed a communicable low voltage Electric appliances and products integrate basic intelligence and communication functions to basically meet the relevant requirements of the smart grid. Although some of the intelligent functions of these products have been applied, most of the functions, especially the communication functions, have not been really used. This is not unrelated to the slow development of the user terminals in China.

Nowadays, the construction of smart grids puts forward new technical requirements for users. The features of interaction, self-healing, optimization, integration, and compatibility of smart grids must be reflected in a new generation of low-voltage electrical appliances. Therefore, in the future, users will receive more and more attention, and smart appliances and systems must integrate many new technologies, such as new technologies such as early warning and regional interlocking, so that low-voltage electrical appliances more in line with the requirements of the smart grid.

At present, the fourth-generation low-voltage electrical products developed in China under the leadership of Shanghai Science and Technology Co., Ltd. will be listed one after another. They integrate many new technologies and new concepts, fully meet the needs of smart grid use, and are very closely integrated with smart grids. In astronomical terms, the fourth-generation products are catching up with the market opportunities for building smart grids. The birth and application of these products will provide strong support for the construction of our smart appliances and systems.

Second, the energy management system has two-way communication, load regulation, energy system analysis, distributed renewable energy access, distributed user-side energy storage charging, two-way power billing, energy saving management, and other functions, which can be used according to the user's different The demand adopts a system for energy management on the user's end with personalized energy-saving and economical operation.

From the perspective of China's national conditions, residents use less electricity, so the energy management system was primarily targeted at large users such as industry and buildings in the early days. There are few companies that can implement energy management at present, so our energy management market is very impressive. Yin Tianwen pointed out that the implementation of large-scale energy management requires the government to support the adoption of the policy and adopt the time-shared electricity price to cut back the peaks and fill the valley to guide electricity consumption. This will involve some new technologies, such as power storage technology, load control technology and new energy access technology. According to Yin Tianwen, along with the development of new energy, related technologies such as energy storage and charging are the topics to be tackled in the next step. There are also technologies for forecasting, access, and cutting out of new energy generation.

For the residents, the most direct connection is the use of smart meters. Smart meters are the most important components in energy management systems. In the past, we focused too much attention on remote meter reading. However, remote meter reading is just one of the most basic functions of smart meters. Yin Tianwen said that from a long-term perspective, smart meters in the home users, it is a micro-energy management and information management router, all the information is concentrated in this table, through the table to connect users and power companies. In the future, smart meters can realize two-way communication and two-way metering to realize the trading and application of electric energy between users and electric power companies.

Third, the intelligent building system refers to a system that has functions such as automatic control of building lighting, home appliance control, remote monitoring, security prevention, and scenario control, and can realize intelligent building and home automation and efficient energy management, mainly including energy-saving lighting and air-conditioning management. Systems, smart home appliance control systems, fire warning and alarm systems, anti-intrusion and anti-theft systems.

There are currently many technologies in intelligent building systems that need to be overcome. Yin Tianwen pointed out that the simplest implementation unit of an intelligent building system is a smart home. The smart home system integrates energy-saving lighting, air conditioning, and home appliances into one platform and can be remotely monitored interactively. A number of smart home units may constitute intelligent buildings or smart communities, among which are many problems to be solved, such as high-speed processing of massive data, matching and compatibility of various systems, and integration problems of distributed new energy generation systems in intelligent buildings.

The intelligent user terminal formed by these three systems is the direction of the development of our low-voltage electrical appliance industry. With the smart grid's strong push, the smart user terminal will develop rapidly in the future, because in the past we were still very weak in these links. Yin Tianwen stressed that based on the concept of a smart grid, Shanghai Science and Technology Institute has started to formulate a smart grid user-end overall plan.

If there is no overall solution, the actual role it can play is minimal. Yin Tianwen explained that overall planning must be carried out on the three major systems mentioned above, the technologies involved, and the systems and products to be formed. .

After that, we will build a test platform and a demonstration platform according to the plan. Yin Tianwen further explained that this platform will have two major functions. First, it will test and test the function to test whether the developed product meets the requirements of the smart grid. Second, the demonstration function will form a concrete demonstration of our understanding of the smart grid. Platform to guide technology development and marketing.

According to reports, Shangke will divide each of the three major client systems into three phases to implement the construction of smart user terminals:

The goal of the first phase is to develop some simple basic equipment and build a basic system on an existing basis. In smart appliances and systems, the fourth-generation products that meet the requirements of the smart grid will enter the market one after another. On this basis, Shangke will build a new generation of intelligent power distribution and control systems based on 3S-Net. In terms of energy management systems, smart meters will be tackled first and then some small energy management systems will be established to focus on effective load control. For smart building systems, the first phase will address the smart home problem first. In addition to the above-mentioned system construction, Shanghai Science and Technology Institute will also begin to formulate supporting standards, do a good job in basic work, and try to do as much as possible to build demonstration projects.

The second stage will be upgraded to a level that will improve the entire system, so that the main low-voltage electrical products and systems in the power distribution field will fully meet the needs of the smart grid; the energy management system will overcome the access, cut-out, and energy storage technologies of new energy sources; It is necessary to realize intelligent buildings and intelligent communities, and further strengthen the marketing of smart user terminals.

The third phase will be to improve the application period. According to the overall thinking of the Shanghai Institute of Technology, the first five years are the key technology research and demonstration application phases, and the next five years will be based on the continuous improvement of products and systems and market promotion and application phases, which will make the entire system of the smart grid from From top to bottom, the overall goal of the smart grid is fully realized.

We have done a lot of preparatory work on the smart user end. According to the requirements of the smart grid, in the near future we can not only provide integrated solutions for smart distribution networks and client systems, but also can provide advanced international standards. Smart appliances. Yin Tianwen finally stated that with the gradual attention of the national smart grid planning to the user end, along with the continuous launch of the fourth-generation products independently researched and developed in China, I believe that the low-voltage electrical industry in China will have a lot to accomplish in the construction of smart grids. The historical opportunity will make the development of low-voltage electrical appliances take off again.

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