CARRIER TYPE DATA SECURITY PROTECTION METHOD AND READING SYSTEM FOR PREPAID WATTHOUR METER

摘要

after the user purchases electric power, the power-purchasing data is transmitted to the user watt-hour meter directly via the power lines carrier by a power-selling operator. A user watt-hour meter carrier module receives the power-purchasing data, then transmits back the acknowledgement information to the watt-hour meter-reading and power-selling computer by the power lines carrier o make a check, while the power-purchasing data is stored into the power-purchasing data storage circuit in specific format. The system is comprised of watt-hour meter-reading and power-selling computer, watt-hour meter-reading concentrator, carrier module comprising a da;a storage circuit composed of nonvolatile RAM (EEPROM, FRAM) device, user watt-hour meter integrated with the carrier module, down channel comprised of the low voltage power supply line and up channel. The present invention makes the distribution, use, measurement and charging under the monitor and control of the computer, so as to prevent power-thieving and leaking, and to protect the power-purchasing da