Summary:As the ongoing reform initiatives in the power sector continue to advance, increasing the focus on energy conservation and consumption reduction is crucial to accelerate the reform process and optimize its outcomes. Skillfully integrating the concept of energy conservation and consumption reduction into the application of power metering technology can enhance the utilization rate of the technology, fully reflecting its value. This approach contributes to achieving the goals of energy saving and environmentally friendly electricity use, thereby promoting the continuous development of power enterprises.
Keywords:Electrical Energy Measurement; Energy Conservation and Consumption Reduction; Intelligent Application
Current Status of Electric Power Metering
Electricity metering plays a crucial role in China's electricity consumption statistics. It accurately tallies electricity usage across various sectors, offering more advantages over traditional meters. The new electricity metering systems can meet extensive electricity usage statistics and, utilizing advanced technology, automatically calculate the total electricity consumption, aiding relevant personnel in understanding the city's electricity usage. Additionally, these new meters can serve as real-time electricity monitoring tools, providing insights into peak usage periods. This data enables relevant departments to implement measures to reduce unnecessary electricity consumption, thereby controlling rational energy use and enhancing the city's green level.
2. Current Status
Throughout the process of social development, various industries actively participate in energy-saving and environmental protection activities, continuously reinforcing their awareness of energy conservation and environmental protection. However, there are certain issues encountered during the implementation of these activities, particularly in the power sector, where the current situation in energy-saving and consumption reduction is far from optimistic. Specific problems include: the impact of low technical levels, leading to poor timeliness in electricity measurement, with existing data lacking authenticity, which indirectly affects the operation of the power system and prolongs the time needed to achieve energy-saving and consumption reduction goals; a lack of awareness regarding electricity measurement, with some individuals not paying sufficient attention to this task, thereby increasing resistance to electricity measurement. In the development phase of electricity measurement technology, there are still certain advantages and disadvantages. Microprocessor real-time processing technology offers flexibility, comprehensive functionality, large capacity, and speed, but it still faces harmonic interference in the actual development process, and there are significant differences in standards for processing without power supply. General-purpose electricity chip technology boasts stability and repeatable development, but due to its significant dependence on its own devices, its functionality during application is relatively poor. It is evident that the research and development of electricity measurement technology needs to be continuously advanced. Relevant scholars should delve deeper into the subject, summarize past research experiences, and appropriately draw on foreign research experiences to ensure the successful development of electricity measurement technology. This is crucial for the application of technology and the demonstration of energy-saving and consumption reduction effects, as well as addressing current issues in the application of electricity measurement technology.
3. Application Analysis
3.1 Equipment Upgrade
In the process of developing electric power enterprises, it is appropriate to introduce advanced technology into power equipment. Among them, the application of the new type of metering device, the electricity meter, can greatly improve data accuracy. Compared to traditional electric meters, the application offers more functions, fully meeting the needs of power metering. The use of intelligent electricity meters also enables remote monitoring of electricity and timely acquisition of data information, allowing power enterprises to allocate electricity rationally according to regional electricity consumption needs, thereby improving the application rate of electricity and minimizing energy consumption. The upgraded metering equipment will have richer measurement functions, such as active power combination; the port output function will be strengthened, including periodic signal interfaces, time switching signals, pulse test signals, error detection signals, and pulse output signals; comprehensive measurement of power parameters, including full monitoring of voltage and power values of electricity meters; and with the addition of event recording functionality, unauthorized system alterations can be promptly stopped to prevent excessive energy waste.
3.2 Intelligent Applications
As China accelerates its grid construction and shifts towards intelligent development, it creates ample space for smart meter applications. Post-implementation, smart meters effectively manage electricity theft, facilitate rapid two-way communication of data with advanced equipment, and supply electricity in appropriate amounts. Moreover, users enjoy enhanced safety during electricity use. In case of leakage, intelligent devices promptly issue alerts, ensuring safe usage and quickly transmitting fault information to local power companies. This ensures timely resolution of existing issues and alleviates user concerns. Smart meters, sensitive to line losses, display specific line faults upon detection, aiding power departments in formulating effective solutions. By analyzing and summarizing information, smart meters can predict high-energy consumption equipment, prompting timely equipment replacement, maintenance, and care. The application of remote power metering technology offers advantages in energy conservation and consumption reduction, closely monitoring power distribution and usage across different regions, and analyzing transaction rationality through the power metering assessment system. During this period, power metering data should support analysis, and the remote system should maximize its monitoring role. The technology's construction methods include distributed and layered architectures, with application equipment mainly consisting of the main station power distribution transformer, data collection terminals, and substation transformers. Business types include wireless services, information acquisition, packet optical services, and terminal equipment collection. Applied to power metering, this technology provides ample momentum for the field, significantly reducing energy consumption and highlighting the technology's application advantages.
4. Energy Consumption Monitoring Platform Implementation
4.1 Data Collection and Analysis
Following the establishment of an energy consumption monitoring system, managers can随时 check the energy expenditure information of water, electricity, and gas in the hospital. They can view the real-time and historical energy consumption of each device under various energy-consuming units. The energy consumption monitoring platform also features over-consumption alerts and other functions, effectively assisting in analyzing energy waste gaps. It allows for quantitative management of departmental energy consumption, aiming to achieve energy-saving goals. The management interface of the energy consumption monitoring system not only directly presents collected data to managers but also, through backend processing and analysis, provides a wealth of comparative data, ranking details, and statistical reports.
A large public hospital has established an all-in-one logistics information management platform that integrates energy consumption monitoring, equipment monitoring, and后勤work order management. The energy consumption monitoring system primarily focuses on monitoring water and electricity usage. Below is a detailed introduction to the features of the energy consumption monitoring platform.
Data processed and analyzed from a large public hospital's energy consumption monitoring system on a certain day in August 2018 reveals real-time energy usage of electricity, water, and other resources within the system. It shows daily consumption trends, year-on-year, and month-on-month comparisons. On that day, electricity consumption was the primary energy use, with air conditioning accounting for 34.2%, lighting and outlets for 31.4%, power for 25.1%, special use (medical equipment) for 8.2%, and other for 1%. Based on the hospital's floor area and number of beds, the energy consumption per square meter of floor area was 0.02 kg of standard coal, and per bed was 1.3 kg of standard coal. The real-time energy consumption and category statistics are shown in Figures 1 and 2. Energy consumption rankings by building and department can also be viewed.
Transformers' energy consumption reports, regional energy consumption reports, total energy consumption reports, and departmental energy consumption reports can be generated in the Report Management section. Additionally, regional energy consumption reports for any time period, as well as total energy consumption reports (refer to Table 1) and departmental water and electricity consumption reports (refer to Table 3), can be generated for each department.
4.2 Provides analytical tools for abnormal energy consumption
The Energy Consumption Monitoring System not only monitors data for water, electricity, and other energy consumption but also issues alarms in case of abnormal energy consumption. Through platform data analysis, it can also provide fault location. Water consumption monitoring for the 5th building of the hospital
Starting from August 3rd, the water consumption in this building surged, stabilizing after August 7th. After comparing it with the average daily consumption of the same period last year, it was found that the daily consumption increased by about 60%. The platform triggered an alarm indicating abnormal water usage in Building 5. Managers immediately investigated the pipeline around Building 5, taking half a month to discover a burst pipe outside the building. After repairs, the water consumption returned to normal levels by September. The energy consumption monitoring system provided data support for the hospital's energy-saving plan, collecting real-time data and performing year-on-year and month-on-month analysis. Based on the comparison results and actual energy usage, managers can develop different energy-saving strategies. The rapid development of the automotive industry has increased environmental pressure in our country. To respond to the current strategic goal of sustainable development, automotive reform has become an important task. New energy vehicles are gradually becoming a new industry in automotive development, as their research and development can effectively reduce the consumption of non-renewable resources like oil, promoting the continuous deepening of energy-saving and environmental protection efforts in the automotive industry.
4.3 Typical Products of China's New Energy Vehicle Technology
Hybrid electric vehicles (HEVs) are a new type of motor vehicle that combines two or more power sources. The advantages of HEVs are quite evident. Firstly, they can adjust the engine's power output based on actual needs. Under normal operating conditions, they consume less energy and produce less pollution, with excess power used to charge the battery. Additionally, during slow driving, the internal combustion engine can be directly turned off, using the battery as the power source, thereby effectively reducing emissions of pollutants. Furthermore, the internal combustion engine can meet the needs of air conditioning and heating systems, and there is no risk of overcharging the battery during operation. The energy consumption monitoring system provides comprehensive energy consumption monitoring. For energy management, hospital energy managers can analyze energy consumption during different time periods based on the facility's operational schedule, controlling standby energy consumption of energy-consuming equipment, and providing reliable data support for formulating management policies to improve energy efficiency. For technical energy savings, the energy consumption monitoring platform can assist in evaluating the average energy-saving effect of the hospital, allowing the selection of appropriate energy-saving products and implementing relevant retrofit measures. Post-retrofit, energy consumption data can be compared with pre-retrofit data provided by the platform, and with real-time monitoring data from the energy consumption monitoring system, to verify energy-saving effects and objectively reflect and evaluate the success of the retrofit. The energy consumption monitoring platform offers data collection, analysis, and fault diagnosis, closely monitoring the effects of energy-saving retrofits and providing comprehensive data for managers to develop suitable energy-saving plans for different energy-consuming units, thereby enhancing the hospital's energy efficiency utilization.
Ankorri Building Energy Consumption Analysis System
5.1 Overview
The Acrel-5000web Building Energy Consumption Analysis System is a user-side energy management and analysis system. It enhances the electrical energy management system by adding centralized collection and analysis of water, gas, coal, oil, and heat (cooling) consumption. By细分 and statistically analyzing all energy consumption at the user end, it presents various energy use and consumption patterns to management or decision-makers through intuitive data and charts, facilitating the identification of high-energy consumption points or inefficient energy usage habits. This effectively saves energy and provides accurate data support for users' further energy-saving retrofitting or equipment upgrades. Users can implement energy calculations according to national regulations, analyze the current situation, identify issues, tap into energy-saving potential, propose practical measures, and submit energy calculation reports to departments responsible for energy conservation at the county or higher level.
5.2 Application Venue
System design, construction, and operation and maintenance for energy consumption monitoring and management suitable for various industries including public buildings, corporate groups, industrial parks, large-scale properties, schools, hospitals, and enterprises.
5.3 System Features
5.3.1 System Overview
Platform operational status, current month's energy consumption conversion, map navigation, hourly and monthly energy consumption curves, and daily and monthly energy consumption year-on-year analysis are displayed in a rolling manner.
5.3.2 Energy Consumption Overview
The company compares energy consumption across buildings, departments, regions, branches, and categories. It supports hourly trends for the current day, daily trends for the current month, energy consumption statistics by time segments, and year-on-year and month-on-month comparisons of total energy consumption.
5.3.3 Energy Consumption Statistics
Statistics on classified energy consumption are conducted in the form of daily, monthly, and annual reports for structures such as buildings, regions, sub-items, and branches. The system supports exporting report data to Excel and generating bar charts based on selected building data.
5.3.4 Reimbursement Rate Statistics
The report on the composite tariff rates conducts statistical analysis on the peak, off-peak, flat, and valley electricity consumption and cost for different branches under a single building, categorized by daily, monthly, and annual statistics. It supports exporting data to Excel.
5.3.5 Year-on-Year Analysis
The energy consumption for buildings, sub-items, regions, and branches is analyzed on a year-on-year basis using a combination of graphs and reports, segmented by daily, monthly, and annual data.
5.3.6 Energy Flow Diagram
The Energy Flow Map displays the energy flow of various types of energy from source to end in a single building during a specified period, supporting views by both original values and normalized values.
5.3.7 Nighttime Energy Consumption Analysis
The night-time energy consumption is statistically compared between working hours and non-working hours for selected branch circuits' energy usage during specified time periods, presented in the form of tables, curves, and pie charts, and supports exporting reports.
5.3.8 Equipment Management
Equipment management encompasses features such as equipment types, inventory records, and maintenance logs, assisting users in effectively managing equipment to ensure smooth operation.
3.5.9 User Report
Users report automatically calculates the monthly usage trends for selected buildings, comparing year-on-year and month-on-month, and provides simple energy consumption analysis results. It offers a separate analysis for electricity usage with tiered rates, and the report is editable.
7. Conclusion
With the continuous development of the economy and scientific society, China is constantly improving its existing domestic electricity reform system. Thanks to the ongoing application of modern automation and intelligent technologies, the power system is also adopting new automation technologies in distribution, with automation levels increasingly advanced. As the country is vigorously promoting smart grids, prioritizing automation in supply and distribution is essential to meet the construction needs of China's power grid. Consequently, the form of electricity metering has undergone significant changes, transitioning from manual meter reading to real-time monitoring of electricity usage, further promoting rational electricity consumption by the public, reducing resource waste, and realizing the sustainable development of the electricity industry.
References
Zhao Guozhong. A Brief Discussion on the Application of Electric Energy Measurement in Energy Conservation and Consumption Reduction. Smart City, 2017, 3(11): 159.
Wu Xiaohuan. Application Discussion on Electric Energy Measurement in Energy-Saving and Consumption Reduction. China New Communication, 2017, 19(22): 161.
Hu Siping, Xiang Haqing. A Brief Discussion on the Application of Electric Energy Measurement in Energy Conservation and Consumption Reduction [J].
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Ankorri Enterprise Microgrid Design and Application Handbook. 2022.05 Edition.
