Thoughts on the Integration of Domestic Electric Meters into the International High-End Market

Author: ZHANG Zhen, Huaneng Jinan Huangtai Power Generation Co., Ltd., Jinan, Shandong 250100, China

Abstract

The export of high-end meters represents the future expectation for the electric meter industry's development in the coming years. This paper addresses three key topics: recent innovative achievements in China's high-end electric energy metering technology, deepening domestic high-end meter product development by drawing upon international design experience, and proposals for establishing a high-end meter export alliance. It presents considerations and recommendations on how high-end meters can integrate into the international high-end market, providing a reference for studying the development of China's metering industry.

Keywords: Energy meters, Power grid, Energy metering

Reviewing the 20-year history of China's electronic meters, it took 15 years to progress from initial development to surpassing induction meters in total production volume. After another five years, medium- and low-end products have come to dominate the domestic meter market. In 2011, State Grid's centralized meter bidding totaled 59.7 million units, with electronic meters accounting for 95% of the share. However, primary meters for grid gateway metering still largely rely on imports, and high-quality 0.2S-class three-phase meters await development. Although China exports large quantities of meters annually (estimated to exceed 20 million units in 2011), it struggles to penetrate the international high-end market, including grid gateway metering and three-phase/single-phase large-capacity user metering. Consequently, exploring the development of high-end electronic meter technology in China to meet domestic market demands with modern high-end meters while forging a path into the international high-end market represents an urgent issue requiring careful study by China's metering industry.

The positioning of modern high-end meters requires three essential elements: high accuracy, high quality, and adaptability to AMI bidirectional communication needs. Specifically, three-phase/single-phase meters should achieve accuracy classes of 0.2S/0.2. Currently, international grid gateway three-phase meters are generally labeled as 0.2S class, representing the highest accuracy class under IEC standards, though actual meter performance far exceeds IEC requirements and their prices are substantially higher than commercial 0.2S three-phase meters for industrial users. It can be said that no unified international product specification for grid gateway three-phase meters exists. High quality, beyond traditional characteristics such as long-term error stability and high operational reliability, requires adaptive capabilities to installation environment changes and power load fluctuations, complying with relaxed error limit values for 0.2S/0.2 class meters. AMI bidirectional communication requirements refer to communication gateway functions, advanced application programs, and large-capacity storage and exchange capabilities.

1. Recent Innovatives in China's High-End Electric Energy Metering Technology

Where should high-end meter product development begin? Since 2006, domestic key meter enterprises, power grids, and administrative legal metrology research departments have collaborated or independently researched high-end electric energy metering technology challenges. They first completed the development of quality testing methods and test equipment for three-phase electronic meters, subsequently launching a batch of domestically pioneering high-end electric energy metering scientific achievements, some of which filled international gaps. Simultaneously, combined with enterprise transformation, important steps have been taken in international product cooperation for electronic meters.

1.1 State Grid Electric Energy Metering Device Performance Evaluation Laboratory (Affiliated with Chongqing Electric Power Research Institute)

After three years of construction, this laboratory became the first in China to possess comprehensive high-end meter performance testing capabilities. In recent years, it has achieved several domestically pioneering testing achievements:

First, in 2010, the laboratory published the paper "Preliminary Exploration of Performance Evaluation Methods for Electronic Multi-Function Gateway Energy Meters." Building upon basic electronic meter performance meeting IEC standards, this paper proposed testing requirements and methods for evaluating special performance, focusing on ten key test items. These include: discrimination of active and reactive power measurement principles under sinusoidal and non-sinusoidal waveforms; full-range measurement error consistency testing across load current, voltage, phase, frequency, and integration periods based on electric energy definitions; discrimination of active and reactive energy measurement differences under harmonic loads; and testing the impact of three-phase voltage imbalance on reactive energy measurement.

Second, in 2011, the laboratory submitted the "Gateway and Large-User Energy Meter Performance Evaluation Report" to State Grid. This report presented test data for 11 commonly used imported and domestic 0.2S-class grid gateway three-phase energy meters produced in 2008. The tested meter models included: ZMQ202C4/C8, ACE8000, A1800, Q1000, MK6E, WQ.MT860S, DTSD341 (0.2 class), DTSD5, DTSD876, and DTSD718.

Analysis of the test data reveals that imported high-end meters do not perform at the same level, particularly showing significant differences in active energy measurement at power factor 0.25 (L) and reactive energy measurement accuracy. Domestic 0.2S-class three-phase multi-function meters exhibit inconsistent performance in active energy measurement at unity power factor. For 0-360° active energy measurement, especially error control at extremely low power factors, there remains a substantial gap compared to international brand meters.

Third, in 2011, the laboratory issued a test report for the 0.1S-class three-phase electronic multi-function energy meter developed by Wasion Group. The test data listed in the report demonstrate that the 0.1S-class meter possesses excellent, flat 0-360° active energy measurement characteristics, with measurement error control at extremely low power factors approaching the level of international brand meters.

1.2 Wasion Group

First, in 2010, Wasion launched the 0.1S-class three-phase electronic multi-function energy meter, filling a domestic gap. The meter specifications are: 3×57.7V, 3×1.5(6)A, 20000imp/kWh. In 2010, the company published the paper "Application of Composite Newton-Cotes Integration Algorithm in Electric Energy Metering."

Second, in 2011, the company published the paper "Analysis of Functional Requirements and Structural Performance for Bidirectional Smart Meters." This meter employs a higher-order integration calculation method—the Newton-Cotes integration algorithm—to improve active and reactive energy measurement accuracy, making the meter suitable for extensive non-linear load metering. Testing by the National Institute of Metrology (NIM) shows that within the load current and active power factor range specified by IEC standards and national standards, the actual relative error does not exceed ±0.03%. This algorithm is applied to the 0.1S-class three-phase electronic multi-function energy meter. Additionally in 2011, the company published the paper "A High-Precision Dynamic Phase Angle Error Compensation Algorithm." This algorithm combines the advantages of classical Newton interpolation algorithms with the strict linear phase characteristics of FIR digital filters, enabling real-time compensation for temperature drift characteristics. Experimental results demonstrate high calculation accuracy, good consistency between phases, and amplitude largely unaffected by frequency and temperature drift. This algorithm is also applied to the 0.1S-class three-phase electronic multi-function meter.

Third, online reports in 2011 stated: "Siemens and Wasion Group Sign Meter Hardware Supply Agreement." Under this agreement, Wasion can sell its smart meter products, including water and gas meters, through Siemens' global sales network to all regions outside China. Simultaneously, both parties will jointly complete the design, research and development, and production of new products according to customer customization requirements, providing customers with technologically advanced, reliable, and cost-effective smart metering products. Note: Separate online reports indicate Siemens is negotiating an acquisition agreement with U.S. eMeter company. Siemens believes eMeter's EnergyIP meter data management software will become an integral part of its smart grid business portfolio.

1.3 China Electric Power Research Institute

First, breakthroughs have been achieved in smart grid standards internationalization. In early 2010, State Grid proposed the concept for a "user-side power source grid connection" standards proposal, which was submitted to IEC in May 2010. In September 2011, the IEC Smart Grid User Interface Project Committee (PC118) was approved by IEC, with its secretariat located in China. The PC118 secretary is Wang Like, Vice President of China Electric Power Research Institute. IEC PC118 established two working groups: "Demand-Side Smart Equipment and Grid Interaction Interface" and "Power Demand Response." In February 2012, the first IEC Smart Grid User Interface Project Committee (PC118) meeting and working group meetings were held in Tianjin, discussing the PC118 strategic business plan and forming future work plans for the two working groups. This paper contends that smart meters form the foundation of smart grid user interface technology, from which it can be inferred that IEC standards related to static meters may be revised, upgraded, or newly developed.

Second, in 2011, the institute published the paper "Functional Requirements and Structural Performance Analysis for Bidirectional Smart Meters." Building upon the 2009 State Grid smart meter functional specifications, this paper proposes five new functions based on potential requirements from smart grid electricity usage and various micro-distributed power source grid connections: bidirectional interaction, power quality monitoring, smart home network interface, maximum load control, and power outage information upload. Smart meters require technical improvements and upgrades including: communication methods, communication rates, communication protocols and interface technologies, power quality monitoring technologies, Rogowski coil applications, ARM series MCUs with Cortex cores, new non-volatile ferroelectric memory, consideration of solid-state relays, supercapacitors as backup power after outages, and consideration of magnetic coupling components to replace optocouplers. This paper believes that the publication of this bidirectional smart meter paper by China Electric Power Research Institute conveys important information that State Grid's smart meter enterprise standards may be revised and upgraded ahead of schedule, requiring attention from China's metering industry.

1.4 Administrative Legal Metrology Research Departments

First, the National Institute of Metrology (NIM) established the national measurement standard for power frequency harmonic active power. In 2007, NIM published the academic report "Power Frequency Harmonic Power Standard." Technical specifications include: 45-65Hz, harmonics up to the 60th order; 60-500V, 0.5-5A, power factor 0(L)-1-0(C); analysis uncertainty: voltage 0.003% of fundamental RMS value, current 0.0036% of fundamental RMS value, power 0.0042% of fundamental apparent power. The technical scheme adopts a non-integer-period sampling strategy, eliminating the need for strict synchronization between sampling rate and measured signals, with leakage addressed through compensation methods. This standard device is used for metrological traceability of harmonic energy meters and harmonic analysis instruments. In 2008, NIM published the paper "Periodic Signal Sampling Measurement Strategy."

Second, Zhejiang Provincial Institute of Metrology and NIM published the 2011 paper "Experimental Research on Dynamic Characteristics of Energy Meters." This topic has attracted attention from domestic and foreign experts, with NIM establishing a project to support preliminary research. The dynamic characteristic measurement signals employ two waveforms: sinusoidal-envelope power frequency signals and trapezoidal-envelope power frequency signals. The standard meter has an accuracy class of 0.01% and uses a sampling calculation principle. However, instead of using pulse output for dynamic measurement, screen display values serve as the basis. After examining existing standard energy meter characteristics under dynamic conditions, a preliminary uncertainty estimate of 3.0% was obtained. For higher-accuracy gateway energy meters, total energy is generally accurate under dynamic conditions, but forward and reverse energy are often inaccurate due to the accumulation time unit's inadequate response to dynamic conditions. Regarding electronic energy meter accumulation methods, different modes have emerged under existing international/national standard provisions, such as longer averaging times and intermittent measurements, all of which are unsuitable under dynamic conditions.

Third, NIM and four other units, after years of technical accumulation and over a year of joint research, established the world's first high-voltage (10kV) electric energy measurement standard device and field calibration device. This project belongs to the "Eleventh Five-Year" Science and Technology Support Plan key project—"Research on Key Technologies for Energy Measurement Standards for Energy Conservation and Emission Reduction"—sub-project "Research on Key Technologies for High-Voltage Electric Energy Measurement Standards and Value Traceability Transmission." The high-voltage electric energy measurement standard device (10kV, 1000A, accuracy class 0.02%) and new three-phase four-wire virtual-ground high-voltage electric energy measurement field calibration device (10kV, 1000A, accuracy class 0.2%) solve the problems of indoor verification of high-voltage electric energy measurement equipment according to actual parameters and online overall verification/calibration of electric energy measurement equipment operating in high-voltage environments. This project will be extended to 20kV, 35kV, 66kV, and 110kV in the future.

1.5 Communication-Related Enterprises

First, Shenzhen Lierda Microelectronics Company first launched in China: OFDM power line high-speed narrowband carrier chip with maximum data rate of 306kbps, using BPSK, QPSK, and 16QAM subcarrier modulation methods, supporting up to 1280 subcarriers, and supporting the domestic power line carrier dedicated frequency band of 3-500kHz. The power line carrier high-speed communication network features original scheme design.

Second, Haiyan Power Grid built the country's first power wireless broadband (4G) system. The system adopts TD-LTE 230MHz power wireless broadband (4G) technology, including a wireless communication master station, three base stations, and 50 electricity information collection terminals. The wireless signal network covers over 500 square kilometers in Haiyan County. Existing user collection terminals only require upgrading.

2. Learning from International Meter Design Experience to Deepen Domestic High-End Meter Product Development

In 2011, domestic 0.1S-class three-phase electronic multi-function energy meters achieved favorable market performance in China, accumulating operational experience. However, compared to the comprehensive level of international AMI-applied smart meters, domestic high-end meters require multi-faceted deepening development.

2.1 Domestic Multi-Function Energy Meters at Medium/Low-End Level

Due to imperfections in international/domestic energy meter product standards and simple domestic electricity pricing rules—particularly the single-tier electricity pricing for residential users that only began transitioning to tiered pricing in 2012—these factors have constrained the development level of China's multi-function meters, placing them on a different level from international brand meters.

First, overall meter design schemes (including hardware and software) have deficiencies. Apparent energy measurement is not included in design scope, affecting monitoring and analysis functions for power triangle measurement. Multi-function meters exhibit不协调 (incoordination) between active/reactive measurement accuracy classes, with active measurement at 0.2S class and reactive measurement at class 2. This causes inconsistency at the low end of the working load range for active/reactive measurement on the same multi-function meter. Single-phase energy meters are all class 2 accuracy, which is too wide an error range for large-capacity single-phase users. Single-phase measurement functions are singular, with only active measurement and no reactive measurement function, making them unsuitable for grid energy conservation and new energy grid-connection metering needs at low power factors. Meter hardware and software design schemes, modular structures, and internal communication methods lack unified specifications, also affecting the application of new technologies. Most meters use general-purpose metering chips, and research and assessment of sinusoidal and non-sinusoidal power algorithms have not received due attention.

Second, measurement is not completely accurate across the 0-360° range. Domestic multi-function meters are only calibrated at active power factors of 1 and 0.5(L), with measurement errors at extremely low power factors uncontrolled.

Third, regarding meter reliability requirements: electromagnetic compatibility testing is conducted only according to standard procedures, without research on improving high-quality meter EMC testing levels. Electronic component databases are under construction. Meter life verification testing technology lacks in-depth research. Testing and countermeasure research for strong electromagnetic field interference in field environments have not yet begun.

Fourth, communication methods are one-way, with communication technology lagging and lacking high-end capabilities. Grid gateway metering and electricity information collection systems extensively use power line narrowband carrier communication, resulting in low automatic meter reading success rates and low communication rates, making them unsuitable for remote prepayment, future real-time pricing, demand response, and AMI communication needs. Using GPRS public networks sometimes causes communication congestion, affecting communication stability. Communication protocols are incomplete; the power industry's meter communication protocols lack unified high-end protocols for routing, relay, and networking, preventing interconnection and interoperability between different communication products.

2.2 High-End Meter Performance Requirements

Following the classification method for high-end meter performance in IEC-related standards, high-end meter performance can be divided into two categories:

Category 1: Basic Performance Requirements—performance requirements proposed by IEC-related standards, national standards, industry standards, and legal metrology verification regulations. These requirements are detailed in relevant standards and will not be repeated in this paper.

Category 2: Special Performance Requirements—performance requirements using the latest and most stringent technical reference standards; distilled from foreign 0.2S-class energy meter enterprise standards that exceed energy meter reference standards or specify requirements not covered by these standards; proposed based on grid requirements for gateway and three-phase/single-phase large-capacity user metering and changes in power loads and operating environments; and requiring improved and expanded type testing performance requirements after analyzing operational quality issues of domestic 0.2S-class multi-function meters.

Special Performance Requirements (Part 1): Representing the high standards required for high-end meters to adapt to the particularities of grid gateway and three-phase/single-phase large-capacity user metering:

• High-accuracy power triangle measurement: For three-phase/single-phase large-capacity user metering, active measurement at 0.2S/0.2 class with actual control error of ±0.1% and maximum difference of 0.05% between primary and backup meters; reactive measurement at 0.5S class with actual control error of ±0.2%; apparent measurement at 1.0S class with actual control error of ±0.3%. Active/reactive measurement error curves should be flat and reasonably distributed: load current range from 0.002In to Imax (dynamic range 1:2000) with measurement linearity error of 1/10 of the meter accuracy class. Meter constants must ensure accurate maximum demand measurement during continuous operation at 0.01In. Load curve storage capacity should store various energy and electrical parameter data at 1-minute intervals for over 15 days.

• Excellent measurement error repeatability and stability: Assessment of experimental standard deviation from preheating to 1-hour operation, and measurement error variation from preheating to 8-hour and 24-hour operation. Maximum error difference between batch meters is ±0.06%.

• Accurate harmonic measurement: Reactive measurement principles must ensure correct reactive measurement under actual harmonic loads. Withstand impact load tests with high/low differences of 10 times or more. Note: IEC only has energy meter product standards under steady-state loads.

• Error variation testing due to meter influence quantities: EMC test levels should be appropriately higher than IEC energy meter product standards.

• Communication requirements: High-end meters must undergo testing and verification of various additional functions under bidirectional communication mode, considering three aspects: whether energy, power/demand, load records, power quality monitoring data, and outage information can be transmitted in real-time to the master station; whether real-time tariff data can be transmitted to users and automatically update the tariff system in high-end meters through the communication system; whether software in high-end meters can be automatically upgraded and updated; and whether remote prepayment real-time management programs can be implemented. Whether remote load control of user loads and micro-distributed power sources can be achieved through the communication system, automatically connecting/disconnecting loads and micro-distributed power sources.

• Bidirectional communication basic functions: Communication gateway function requires meters to make "intelligent" responses to received information, communicate with smart home appliances and water/gas meters, and communicate with power facility controls. This is a collection of multiple communication methods requiring protocol conversion capabilities between different communication networks. Advanced intelligent applications require smart meters to independently and real-time judge and respond to bidirectional information, with decision-making being the core. This necessitates configuring advanced algorithms and software with high-speed calculation and processing capabilities. Large-capacity data storage and exchange require smart meters to undertake bidirectional communication and interaction functions between smart grids and users, with configuring massive data storage being a basic measure.

Further discussion is needed on what indicators/performance should be used to describe bidirectional communication capabilities, such as: types of access communication methods; types and flow directions of data/information streams; bandwidth and transmission rates; peer-to-peer protocols/master-slave protocols; calculation and processing speeds; different network protocol conversion capabilities; and data storage capacity testing.

• Software requirements and testing: A paper published by Zhejiang Provincial Institute of Metrology, "Preliminary Exploration of Smart Meter Concepts, Standardization, and Testing Methods," points out that smart meter additional functions are all implemented through software. Software requirements should be proposed from three aspects: correctness, security, and consistency, with verification focusing on five areas: software identification number display; algorithm and function correctness; program and data storage security; parameter security; and fault identification and persistent protection. Smart meter software testing processes generally include software document analysis, measurement function confirmation, software feature confirmation, data flow, and module testing steps. Note: Unified specialized/typical technical specifications need to be formulated for electronic multi-function energy meter software requirements and testing methods.

Special Performance Requirements (Part 2): Representing cutting-edge measurement functions required for high-end meters to adapt to modern metering needs:

• Power quality monitoring
• Maximum load control
• Power outage information upload function
• Harmonic energy measurement and calculation of harmonic instantaneous power factor and harmonic average power factor
• Maximum demand measurement under dynamic loads
• Support for IEEE 1459-2000 standard with measurement functions for active power, reactive power, distortion power, and apparent power (energy) under non-sinusoidal waveforms
• Self-correction for voltage, frequency, phase, and temperature changes
• High-speed, real-time measurement and recording

2.3 High-End Meter Product Deepening Development Process

Three-Phase High-End Meters: The deepening development goal for three-phase high-end meter products is to achieve comprehensive quality reaching international brand meter levels in metering functions and additional functions, hardware and software design, reliability, stability, and bidirectional communication capabilities, certified by international authoritative bodies, enabling entry into international and domestic high-end meter markets.

• Conduct further research on three-phase high-end meter quality testing technology: including research on expanding three-phase high-end meter quality testing subjects; research on three-phase high-end meter design scheme evaluation methods; and exploration of three-phase electric energy metering algorithm and general-purpose metering chip application performance evaluation methods.
• Conduct extensive international and domestic electronic meter quality testing comparisons, with summarized analysis providing references for determining domestic high-end meter technical indicators and functional requirements.
• Collaborate with provincial administrative legal metrology departments to formulate three-phase high-end meter technical specifications, proposing application requirements and local product standards.
• High-end meter product development must start from design: meter hardware and software architecture should be upgradeable, compatible with current mainstream technology and adaptable to future communication media and data communication bidirectionality. The architecture's communication standards must ensure security of data exchange with metering modules, allow communication protocol innovation, support grid-user interactive information and management services, and allow various high-end meter schemes including fully integrated, modular, and multi-component approaches.
• Optimize overall design: adopt hardware and software design schemes that are fast, stable, modular, simple, and easy to debug.
• Implement strict component screening and establish meter reliability databases.
• Implement rigorous process flows and production line automation.
• Metrological traceability should be a prerequisite for new product development. Given that national measurement standard establishment and assessment require long-cycle procedures, for cases where national measurement standards are temporarily unavailable, international metrological traceability can be sought. For example, Germany's PTB can issue test reports for 0.01-class three-phase standard energy meters at active/reactive power factors of 0.01.

Single-Phase High-End Meters: The development goal for single-phase high-end meter products is to first develop 0.2-class single-phase multi-function meters in China, featuring power triangle measurement, power quality monitoring, maximum load control, bidirectional interaction functions, smart home network interface, and bidirectional high-speed communication functions. These will be used for new energy grid-connection and AMI pilot projects in smart electricity usage communities while also being exported to international high-end markets.

• Initiate research projects on single-phase high-end meter quality testing technology: including research on single-phase high-end meter quality testing methods; research on single-phase high-end meter design scheme evaluation methods; and exploration of single-phase metering algorithm and general-purpose metering chip application performance evaluation methods.
• Conduct extended research on basic performance testing methods for metering products: improving and upgrading basic performance testing methods and exploring simulation testing methods for anti-electromagnetic field interference in field environments.

Requirements for single-phase high-end meter technical specifications, product design, and metrological traceability are the same as those for three-phase high-end meter product deepening development and will not be repeated here.

Advancing High-End Meter Reliability Assessment Method Research:

• Key control technologies for high-end meter reliability
• Performance evaluation and analysis methods for high-end meter key components
• High-end meter reliability pre-calculation methods
• High-end meter key component testing platforms
• High-end meter component reliability database technology
• Development of long-life single-phase high-end meters evaluated and tested by internationally recognized authoritative certification bodies

3. Suggestions for Establishing a High-End Meter Export Alliance

Advocating for high-end meter export reflects China's metering industry seizing industrial development opportunities. In recent years, influenced by State Grid's low-price centralized bidding, medium/low-end meters have been exported in large quantities, facing low-price export competition. Consequently, high-end meter enterprises are urgently managing enterprise transformation. International AMI development has created increasingly strong demand for bidirectional smart meters, which is highly attractive, while domestic high-end meter market and technology development prospects remain uncertain. Development has two sides: high-end meter enterprises also face difficulties due to insufficient strength and experience in integrating into the international high-end market. This paper proposes that establishing a high-end meter export alliance serves as a bridge for China's electronic meters to integrate into the international high-end market and as an industrial development strategy for cooperatively solving enterprise transformation challenges.

Tasks of the High-End Meter Export Alliance:

1. High-End Meter Product Forum:
2. Characteristics and key technologies of international high-end meter performance
3. Preliminary results of cooperative research on domestic three-phase/single-phase electronic meter quality testing methods
4. Domestic 0.2S-class three-phase meter enterprise standards
5. Strategies for constructing high-quality power line narrowband automatic meter reading systems
6. High-voltage (10kV) meter key technologies
7. Gateway energy meter performance evaluation cases
8. Issues in international and domestic electronic meter application and design

9. New electronic meter product technologies from 2010-2012

10. Translation of IEC, IEEE, U.S., EU, and International Organization of Legal Metrology (OIML) IR46 standards; compilation and internal publication of high-end meter materials

11. High-End Meter Performance and Testing Method Research:

12. High-end meter performance research including A/D dynamic characteristics, metering algorithms and calculation speed, software/hardware modularization, and overall reliability design
13. Multi-function meter function accuracy testing
14. Increased severity of electromagnetic compatibility indicators
15. Electric energy measurement and power quality measurement algorithm evaluation methods
16. Meter response capability testing to harmonics
17. Reliability verification testing
18. International bidirectional smart meter performance testing
19. High-end meter design process analysis and production process flow testing
20. International and domestic metrological traceability technology

21. Study and testing of international meter certification methods

22. New Distribution and Consumption Communication Technology Research:

23. OFDM power line narrowband high-speed communication methods
24. Power line broadband high-speed communication methods
25. Micropower wireless communication methods
26. Fiber-to-the-home communication methods

27. Wireless broadband 4G/3G remote communication methods

28. High-End Meter Product Specification Formulation: Based on the aforementioned international bidirectional smart meter performance testing, combined with reference to the previously described "Gateway and Large-User Energy Meter Performance Evaluation Report" and "0.1S-Class Three-Phase Electronic Multi-Function Energy Meter Test Report," determine high-end meter basic performance and special performance indicators and testing methods following IEC electronic meter performance classification methods.

29. High-End Meter Product Hardware and Software Technical Design Scheme Formulation; Design Scheme Evaluation Method Research; Organize Prototype Testing

30. Energy Meter Data Management System and Software Research

31. Communication and Exchange with International Meter Authority Certification Bodies

32. International High-End Meter Market Bidding Mode and Bidding Strategy Research; Cooperatively Organize and Undertake High-End Meter Overseas Pilot Projects

33. International High-End Meter Product Technology Exchange Activities

34. International and Domestic High-End Meter Product Market Forecast Reports

35. High-End Meter Product Advanced Training

36. Organize Cross-Domain New Technology (Product) Research Around Smart Distribution and Consumption Grid Construction Needs, Providing Overall Solutions

37. High-End Meter Product Development Planning and Implementation Plan Formulation

Regarding the charter and cooperative research project implementation methods for establishing a high-end meter export alliance, based on the development situation of China's metering industry, the author of this paper can discuss these in separate topics.

The innovative achievements in China's high-end electric energy metering technology described above provide new direction for international electric energy metering technology development. Discussing how high-end meters can integrate into the international high-end market reveals the future development prospects of China's metering industry. This requires high-end meter enterprises not only to export high-end meters but also to become members of the international brand meter enterprise family, actively seeking discourse power in the formulation of IEC meter standards and international communication standards, making greater contributions to developing the international electric energy metering cause, and gradually achieving the long-term goal of internationalization.

References:
[1] Zheng Ke; Hou Xingzhe; Zhang Chunhui; Peng Peng. "Preliminary Exploration of Performance Evaluation Methods for Electronic Multi-Function Gateway Energy Meters." Electrical Measurement & Instrumentation, 2010-01.
[2] Song Huina; Yi Longqiang. "A High-Precision Dynamic Phase Angle Error Compensation Algorithm." Electrical Measurement & Instrumentation, 2010-12-25.