With the advent of smart cities, smart grid construction follows closely. Hangzhou Shen Electric Co., Ltd. is fancy the future construction of smart grid "big cake", the vision focused on intelligent circuit breaker R & D and marketing. Hangzhou Shenfa Electric Co., Ltd. is a state-level key high-tech enterprise integrating R & D, manufacturing and marketing. As a high-tech enterprise in Zhejiang Province, the low-voltage electrical appliances produced by the company are widely used in industries, electric power, transportation and other fields. "Unlike traditional power terminals, our equipment is intelligent." Zhang Jianjiang, general manager of the company, said that to make a simple analogy, the original one had problems with one line. Since there are thousands or even tens of thousands of terminals, It is difficult to find out where the problem suddenly; and the application of our equipment, the network can remotely monitor each terminal of the three-phase voltage, three-phase current, residual current and other electrical parameters, you can check the cause of the fault trip and trip Of the electrical parameters, where there is a problem, you can immediately determine. And, more importantly, the smart circuit breakers produced by Shinwa Electric reduce the line losses in power. "Do not look at each terminal of the power loss is not large, but tens of thousands of end users together, may be 'astronomical digital' for the country is a great loss of electricity." Zhang Jianjiang said. In itself, Zhang Jianjiang, a high-voltage electrical engineer in his own right, has been concentrating on research and development of intelligent circuit breakers in recent years with more than 10 people in the R & D center. Hard work pays off, the end of last year, Shanghai Electric in the bidding of many enterprises to win the competition, making GFL1Z series of products in the successful application of Zhejiang smart grid construction. At present, in Hangzhou and Huzhou two cities, the application of the product reached 45,000 units. According to Zhang Jianjiang, the goal of smart grid is to digitize and intelligently manage and maintain each operation and maintenance link that needs to be monitored, controlled and managed at the end of the grid. Data exchange and integration should be made through the networked information and communication platform so that the operation and management of the grid can be changed from "static" Mode into "dynamic" mode, and has the characteristics of rehabilitation self-healing and optimization, user participation and flexible selection for power supply parties to realize safe, efficient, reliable and flexible operation and management of the power grid. "Our equipment can be said to solve the problem of the" last mile "of the smart grid, said Zhang Jianjiang. For the already owned 21 patents, software copyright 3, the development of electricity, the road of development is far from over. "The future of terminal equipment is certainly to miniaturization, intelligent and integrated development." Zhang Jianjiang full of confidence in the future of intelligent circuit breakers.