POWER INFORMATION TRANSMITTING AND RECEIVING SYSTEM IN THE SMART GRID

摘要

The present invention relates to a power information transmitting/receiving system in a smart grid which, when a smart meter matches power consumption by appliances with identification information and transmits the same to a data collection unit, carries out encryption and decryption by using a symmetric key pre-distributed between the smart meter and the data collection unit, and between the data collection unit and an AMI head end, and verifies integrity by using hash values. The system comprises: a plurality of home appliances which match the power consumption with identification information and create power information and transmits the same; a plurality of smart meters which receive the power information from the home appliances respectively, store the same, create a first hash value for integrity verification of the stored power information, encrypt the power information by using the hash value, match smart meter identification information with the encryption data and transmit the same; a data collection unit which decrypts the received data and verifies the integrity of the received data by using the symmetric key, gathers data by smart meter, creates integrity verification values of data gathered by smart meter, encrypts the smart meter identification information, the total power consumption, a data collecting time and a second hash value, matches with data collecting unit identification information and transmits the same; and an AMI head end which decrypts data received from the data collection unit, verifies data integrity, gathers data by data collection unit, creates charging request information by smart meter and transmits the same.