研究目的
Investigating the uncertainty of Total Vector Error (TVE) in Phasor Measurement Units (PMUs) using Monte Carlo simulation.
研究成果
The uncertainty of TVE was successfully calculated, revealing the most significant contributions from the gain of the transducer and digitizer. The probability distribution function of TVE was found to be asymmetrical, especially for lower values of TVE, due to the reflection of the normal PDF near zero.
研究不足
The study highlights the complexity of PMU calibration and uncertainty estimation, pointing out the asymmetrical uncertainties of TVE and the need for detailed simulation to capture these effects accurately.
1：Experimental Design and Method Selection:
The study involved simulating the whole measurement chain of a PMU, including a transducer, a digitizer, and a synchrophasor estimating algorithm, using Monte Carlo method for uncertainty calculation.
2：Sample Selection and Data Sources:
Simulated waveform and reference values were generated, with part of the Common PMU computing platform (CPCP) used as the data generator.
3：List of Experimental Equipment and Materials:
The digitizer was simulated according to specifications of a National Instruments PXI 4461 analogue-to-digital converter.
4：Experimental Procedures and Operational Workflow:
The process involved generating simulated data, applying effects of the transducer and digitizer, calculating synchrophasor values, and comparing them to reference values to calculate TVE.
5：Data Analysis Methods:
The uncertainty of TVE was analyzed, identifying the most important uncertainty contributions and the behavior of the probability distribution function.
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