Prototype development of single phase prepaid kWh meter

The single phase prepaid kWh meter consists of energy metering and STS system, based on International Standard: IEC 62055-31, 62055-41, IEC 62055-51. The energy metering measure line voltage, current and calculates active, reactive apparent power, energy, power factor, and RMS voltage and current. There are two separate inputs to measure line, ground, and/or neutral current enabling the meter to detect tampering and to continue operating. Development of single phase based on needs of PLN, which is about 7 million units kWh meter up to year 2014, especially for new customer. The energy metering subsystem is developed based on CS5464 Cirrus Logic IC that has been widely used around the world. The features of CS5464 as follows: Energy Linearity ±0.1% of Reading over 1000:1 Dynamic Range, On-chip Functions: Voltage and Current Measurement Active, Reactive, and Apparent Power/Energy RMS Voltage and Current Calculations Current Fault and Voltage Sag Detection Calibration Phase Compensation Temperature Sensor Energy Pulse Outputs, Meets Accuracy Spec for IEC, ANSI, & JIS, Low Power Consumption, Tamper Detection and Correction. Additional features include system-level calibration, voltage sag and current fault detection, peak detection, phase compensation, and energy pulse outputs. The STS subsystem proposed is developed based on Texas Instruments MSP430™ series that has Ultra Low Power consumption. The features of STS (Standard Transfer Specification) as follows: Communication Parameter: 9600, 8, N, 1 and ASCII data; Command Parameter: Process Token, Authentication Result, Validation Result, Set Initial Key, Set Time, and Set Manufacturing Code. The STS algorithm is complied with STS Compliance Test: STS 501-4-2, STS 501-5-2, and STS 501-6-2. The prototype has been developed, tested and verified in electrical energy conversion research laboratory ITB.