An Accurate Voltage Measurement System Based on DSP and Optical Fiber Transmission

Accurate voltage measurement is very important for power energy measurement. To reduce the total error of power energy measurement, a novel voltage measurement system is designed in this paper. The system uses Digital Signal Processor (DSP) to accomplish signal acquisition and processing, and uses optical fiber to realize zero voltage drops in long distance transmission. The results of expriment show that amplitude error of the voltage measurement system is less than 0.03% and phase error is less than 0.3’, and the error analysis proved for a class 0.2 voltage transformer (VT), system errors can be ignored. This voltage measurement system can satisfy the demand of high accuracy power energy measurement.