24 metrological standards of the Electric Energy Metering Center have passed the on - site assessment of the Jilin Provincial Administration for Quality Supervision
Recently, 24 measurement standards established by the Electric Energy Measurement Center have successfully passed the on - site assessment of the Jilin Provincial Administration for Quality and Technology Supervision (hereinafter referred to as the "Provincial Administration for Quality and Technology Supervision"). This result is an authoritative confirmation of the compliance and stability of the center's measurement standard system, and it has laid a solid technical foundation for the accurate implementation of subsequent electric energy measurement work.
The assessment is based on JJF1033 - 2008 as the core to ensure the authority of the standard
This assessment strictly follows the JJF1033 - 2008 "Specification for Assessment of Measurement Standards", which is the "fundamental principle" in the field of metrology in China. It clearly stipulates from technical requirements (accuracy of standard measuring instruments, traceability chain of measurement values), management requirements (personnel qualifications, environmental control) to assessment procedures (on - site experiments, data verification), aiming to ensure the "traceability" and "reliability" of measurement standards. Based on this specification, the Provincial Bureau of Quality and Technical Supervision comprehensively verifies the performance and management system of the measurement standards of the center to ensure that each standard meets the national metrological requirements.
22 "Recheck Items": Guard the "Lifeblood" of Basic Measurement
In the assessment, 22 existing measurement standards have completed the re - assessment, covering four major categories: single - phase electric energy meter verification devices, three - phase electric energy meter verification devices, current transformer verification devices, and voltage transformer verification devices. These devices are the "cornerstones" of electric energy measurement.
- The single-phase/three-phase electric energy meter verification device is responsible for verifying the metering accuracy of user-side electricity meters, which is directly related to the fairness of electricity charges for residents and enterprises.
- The current/voltage transformer verification device is designed for the core equipment on the power grid side (such as transformers in substations and transmission lines) to ensure the authenticity of the power grid operation data.
Passing the re-inspection means that the performance of these devices is continuously up to the standard — their stability and accuracy have not deteriorated due to long-term use, and they can continue to support the daily basic verification work of the center to ensure that every piece of measurement data is reliable.
2 New Projects: Fill the blank spots in on - site testing
Another key point of this assessment is the assessment and authorization of two newly-built portable current transformer verification devices. Compared with traditional fixed verification devices, the core advantage of the "portable" devices lies in "mobility":
- Traditional devices require the instrument transformers to be transported to the laboratory for verification, which is time - consuming and labor - intensive. In contrast, portable devices can directly go to the site (such as outdoor lines, substations, and user distribution rooms) for testing without disassembling the equipment. For example, for the instrument transformers in operating substations, portable devices can provide "on - site service", which not only reduces the losses caused by equipment shutdown but also improves the testing efficiency.
This newly added capability expands the testing scenarios of the center from the "laboratory" to the "site", addressing the pain point of the previous "inability of fixed devices to cover outdoor scenarios" and significantly enhancing the flexibility of metrology services.
From 29 to 31: The Capability Leap Behind the Quantity Growth
After the assessment, the total number of the central metrological standards increased from 29 to 31. The essence of this change is a "qualitative improvement" in the testing ability:
- 22 existing devices passed the re-inspection to ensure the "stability" of the basic verification.
- Two new portable devices have been added, expanding the capability boundary of "on-site testing".
Overall, the testing coverage of the center is more comprehensive (from the laboratory to the field), the response speed is faster (no need to wait for equipment transportation), and the data reliability is higher (the standard system is continuously compliant). These changes will be directly translated into the support capacity for the power system. For example, it can handle on - site transformer faults more quickly and resolve disputes over users' electricity meters more accurately, providing stronger technical support for the safe operation and fair trading of electricity.
This assessment is not the "end point" but a "new starting point". Relying on a more complete measurement standard system, the center will take the passing of the assessment as an opportunity to provide more efficient and accurate measurement services for the power industry.