(The policy of smart grid: is to use information and communication technology in modern grid to realize the transmission, distribution, management and control of electric energy from power source to users, so as to achieve the policy of saving power and resources. The essence of smart grid: power substitution and compatible use. It mainly uses terminal sensors to form an instant network interaction between users, users and power grid companies, and then realizes real-time, high-speed, and two-way data reading.)