The intelligent electricity meter is adopted widely in the power system. To improve the verification efficiency and decrease the artificial error, realizing automatic verification of the intelligent electricity meter is necessary. The image of the intelligent electricity meter is collected with the camera, and the image processing is conducted, including region positioning and segmentation, tilt correction, gray scale, smoothing, binarization, sharpening, discrete point removal and edge detection. After the image processing, the decimal point is positioned, the negative sign is judged, and the digit recognition is conducted. The results show that the verification efficiency is improved greatly than the manual operation.
To address the issues of low efficiency, poor security, insufficient compatibility, and difficulties in traceability associated with high-voltage electric energy metering (HVEEM) device verification methods, this paper proposes a design scheme for a remote verification system (RVS) of such devices based on a power cloud platform (PCP). The system adopts the concept of “high-precision local sampling + remote cloud verification” and develops a local acquisition device with compatibility and high precision to achieve fast acquisition of local electrical parameters. The IEC 61850 communication modeling is utilized to establish unified communication standards between the local device and the PCP. The PCP provides two verification methods: physical error verification based on a multi-channel standard and digital verification based on an improved Backpropagation (BP) neural network simulation model. Leveraging the advantages of power cloud technology, the system enables functions such as electrical energy calculation, remote intelligent error verification, cloud storage, condition monitoring, and early warning. Through testing and application, it has been demonstrated that the system achieves an integration accuracy level better than 0.02. It also exhibits good security, compatibility, and traceability of measurement values while attaining a high level of informatization and intelligence. Particularly, the system shows promising prospects for the remote and efficient verification of large-scale and multi-type high-voltage metering devices.
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