Field PMU Test and Calibration Method– Part I: General Framework and Algorithms for PMU Calibrator

Sudi Xu; Hao Liu; Tianshu Bi

DOI:10.35833/MPCE.2021.000526


Field PMU Test and Calibration Method– Part I: General Framework and Algorithms for PMU Calibrator



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Author: Sudi Xu^1,2, Hao Liu¹, Tianshu Bi¹
Author Affiliation: 1. State Key Lab of Alternate Electric Power System with Renewable Energy Sources (North China Electric Power University), Beijing, China 2. State Grid Jiangsu Electric Power CO., LTD. Research Institute, Nanjing, China
Foundation:	This work was supported by the National Natural Science Foundation of China (No. 51725702).

Abstract:	Laboratory testing of phasor measurement units (PMUs) guarantees their performance under laboratory conditions. However, many factors may cause PMU measurement problems in actual power systems, resulting in the malfunction of PMU-based applications. Therefore, field PMUs need to be tested and calibrated to ensure their performance and data quality. In this paper (Part I), a general framework for the field PMU test and calibration in different scenarios is proposed. This framework consists of a PMU calibrator and an analysis center, where the PMU calibrator provides the reference values for PMU error analysis. Two steps are implemented to ensure the calibrator accuracy for complex field signals: ① by analyzing the frequency-domain probability distribution of random noise, a Fourier-transform-based signal denoising method is proposed to improve the anti-interference capability of the PMU calibrator; and ② a general synchrophasor estimation method based on complex bandpass filters is presented for accurate synchrophasor estimations in multiple scenarios. Simulation and experimental test results demonstrate that the PMU calibrator has a higher accuracy than that of other calibrator algorithms and is suitable for field PMU test. The analysis center for evaluating the performance of field PMUs and the applications of the proposed field PMU test system are provided in detail in Part II of the next-step research.
Keywords:	Phasor measurement unit (PMU) ; calibration ; synchrophasor ; signal denoising ; field PMU test

Received:August 02, 2021 Online Time:2022/11/21



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