数字式检测装置相位误差量值溯源方法研究.pdfVIP

Smart Grid 智能电网, 2016, 6(6), 353-359 Published Online December 2016 in Hans. /journal/sg /10.12677/sg.2016.66039 Research on Method for Phase Accuracy Measurement Traceability of Digital Test Equipment Ming Lei, Yue Guo, Yingchun Wang, Lieqi Yan, Xin Zheng Metrology Centre of Hubei Electric Power Company, Wuhan Hubei th th th Received: Oct. 18 , 2016; accepted: Nov. 12 , 2016; published: Nov. 15 , 2016 Copyright © 2016 by authors and Hans Publishers Inc. This work is licensed under the Creative Commons Attribution International License (CC BY). /licenses/by/4.0/ Open Access Abstract Electronic instrument transformers (EIT) and merging units (MU) are widely utilized in the smart substations, and EIT testers and MU testers are used to test the accuracy of EITs and MUs. The EIT tester calibrator can calibrate the accuracy of the equipment. However, the accuracy of calibrator, especially the phase accuracy, cannot be traced to the existing standards due to the lack of appro- priate method, thus causing the incompleteness of the accuracy tracing system. Therefore, the EITs and MUs running in the smart substations cannot be used as electric power measurement equipment. In order to solve this problem, a method to calibrate the phase accuracy of the digital equipment is proposed in this paper. Compared to the currently used method based on digital mi- cro-difference source, this method can trace the phase accuracy of EITs and MUs to a precise time standard. This method provides the technical basis for the smart equipment’s utilization as me- trological devices. Keywords Phase Accuracy, Electronic Instrument Transformer, M