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NB/T 11146-2023Technical specification for online comparison of power quality monitoring device (English PDF)

电能质量监测装置在线比对技术规范

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Issued by

NEA

Level / Type

Industry · Recommended

Issue date

February 6, 2023

Implementation date

August 6, 2023

Scope

NB/T 11146-2023 is the English-translated version of 电能质量监测装置在线比对技术规范.

NB/T 11146-2023 is the Chinese energy industry specification for checking the accuracy of permanently installed power quality monitoring devices on site by online comparison.

It sets requirements for the portable comparison device, whose measurement, network time synchronization, data acquisition and data analysis modules must be more accurate than the monitoring device under test.

The testing part covers environment, test scheme and items, and error checks for voltage, frequency, three-phase unbalance, harmonics and interharmonics, and flicker, followed by the test procedure.

A final clause deals with data processing, evaluation of results and handling methods, and an informative appendix explains how to calculate the fractal dimension. Issued on 6 February 2023, it has applied since 6 August 2023.

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Document preview — NB/T 11146-2023

National Standard of the People's Republic of China

ICS: 17.220.20
Classification: K 04

Issued by: National Energy Administration of the People's Republic of China

Preface
1 Scope
2 Normative references
3 Terms and Definitions
4 Comparison device technical requirements
4.1 General requirements
4.2 Measurement function module
4.3 Network time synchronization function module
4.4 Data acquisition function module
4.5 Data analysis function module
5 Requirements and procedures for online comparison testing
5.1 Detection environment
5.2 Detection scheme
5.3 Test items
5.4 Detection of voltage measurement error
5.5 Detection of frequency measurement error
5.6 Detection of three-phase unbalance measurement error
5.7 Detection of harmonic/interharmonic measurement errors
5.8 Detection of flicker measurement errors
5.9 Detection process
6 Detection data processing and evaluation
6.1 Basic requirements
6.2 Data processing
6.3 Results Evaluation
6.4 Processing method
Appendix A (informative) Calculation method of fractal dimension Reference

Foreword

This document is in accordance with the provisions of GB/T 1.1-2020 "Guidelines for Standardization Work Part 1. Structure and Drafting Rules for Standardization Documents" drafting.

1 Scope

This document specifies the technical requirements for comparison devices, online comparison testing requirements and procedures, and testing data for online comparison of power quality monitoring devices. processing and evaluation.

This document is applicable to the online detection of the accuracy of power quality monitoring devices fixedly installed on site.

2 Normative references

The contents of the following documents constitute the essential provisions of this document through normative references in the text. Among them, dated references For documents, only the version corresponding to the date is applicable to this document; for undated reference documents, the latest version (including all amendments) is applicable to this document.

GB/T 8170-2008 Numerical rounding off rules and expression and determination of limit values

GB/T 17626.30-2012 Electromagnetic Compatibility Test and Measurement Technology Power Quality Measurement Method

GB/T 19862-2016 General requirements for power quality monitoring equipment

GB/T 32507-2016 Power Quality Terminology

DL/T 860.73-2013 Electric power automation communication network and system Part 7-3. Basic communication structure public data class

DL/T 860.74-2014 Electric Power Automation Communication Network and System Part 7-4. Basic Communication Structure Compatible with Logical Node Classes and data class

DL/T 1100.1-2018 Time Synchronization System for Power Systems Part 1. Technical Specifications

DL/T 1100.4-2018 Time Synchronization System for Power Systems Part 4. Technical Specifications for Testers

DL/T 1862-2018 Power Quality Monitoring Terminal Detection Technical Specifications

JB/T 5472-2022 Instrument Current Transformer

3 Terms and Definitions

GB/T 17626.30-2012, GB/T 32507-2016, DL/T 1100.1-2018 and the following terms and definitions apply in this document.

3.1 Power quality monitoring device

It is a special device for measuring power quality indicators by introducing voltage and current signals.

Note: Hereinafter referred to as "monitoring device", the monitoring device is divided into two types. analog and digital. [Source: GB/T 32507-2016, 3.2, modified]

3.2 Comparison device

A portable power quality measurement device used for on-site comparative detection of the measurement accuracy of the monitored monitoring device, the measurement accuracy.

The accuracy is higher than that of the monitoring device, providing high-precision time synchronization service, and having the function of statistical analysis of the measurement data of the monitored monitoring device.

Note: hereinafter referred to as "comparison device".

......
This preview omits tables, figures, formulas and parts of the technical clauses. The complete document — 15 pages — is available in the English PDF.

Referenced standards

Normative references

DL/T 860.73-2013

Similar standards

GB/T 19862-2025|GB/T 42154-2022|GB/T 35725-2017|GB/T 6881.2-2017|GB/T 45869-2025|GB/T 42632-2023

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