摘要1.随着工业技术水平的不断提高，智能化技术的应用越来越广泛。数字电

Abstract <br>1. With the continuous improvement of industrial technology level, the application of intelligent technology is becoming more and more extensive. As the infrastructure of the power industry, digital energy meters have been more and more widely used in the market in recent years. Under the trend of intelligence, the demand and application range of digital energy meters are also expanding. This thesis chooses single chip microcomputer as STC15F2K60S2 core controller to realize the design of digital electric energy meter, and verifies the feasibility of the design through experiments. <br>2. This paper first introduces the basic knowledge of digital energy meters, including the basic principles of energy measurement and the classification, performance indicators and technical requirements of digital energy meters. In particular, the principle and way of realizing the digital electric energy meter through the single-chip microcomputer are expounded in detail. Secondly, this thesis analyzes in detail the overall structure design of the digital electric energy meter and the realization methods of each part's functions, including circuit design, single-chip computer program design and communication protocol. <br>3. According to the design requirements of the thesis, single-phase measurement is carried out on the line, and the effective value of current (I) and voltage (U) and instantaneous power can be measured in real time. The digital energy meter is designed with an alarm function, which can set the alarm parameter threshold by itself, and the buzzer will alarm if the parameter exceeds the set threshold value, so as to effectively protect the circuit. The energy meter adopts a modular design, and the acquisition part is divided into a current acquisition module, a voltage acquisition module, and a power factor acquisition module, which are converted into digital signals that can be processed by the A/D converter of the single-chip microcomputer STC15F2K60S2 chip. The internal program operation realizes the real-time measurement and display function of power parameters; the minimum system of the single-chip microcomputer integrates the LCD1602 liquid crystal display module, and the power parameters can be viewed in real time through the LCD1602 liquid crystal screen; DC5V and DC12V stable DC power supply. The interrupt program can be set inside the STC15F2K60S2 chip, and the alarm value can be set at any time, and converted into readable power parameters according to the collected data. <br>Key words: single chip microcomputer STC15F2K60S2; digital electric energy meter; energy measurement; power system;

abstract<br>With the continuous improvement of industrial technology, the application of intelligent technology is becoming increasingly widespread. Digital energy meters, as the infrastructure of the power industry, have also been increasingly widely used in the market in recent years. In the trend of intelligence, the demand and application scope of digital energy meters are also constantly expanding. This paper selects a microcontroller as the STC15F2K60S2 core controller to implement the design of a digital energy meter, and verifies the feasibility of this design through experiments.<br>2. This paper first introduces the basic knowledge of digital energy meters, including the basic principles of energy metering and the classification, performance indicators, and technical requirements of digital energy meters. Specifically, the principle and implementation method of implementing a digital energy meter through a microcontroller were elaborated in detail. Secondly, this paper provides a detailed analysis of the overall structure design and functional implementation methods of various parts of the digital energy meter, including circuit design, microcontroller program design, and communication protocol.<br>According to the design requirements of the paper, single-phase measurement is carried out on the line, which can measure the effective values of current (I) and voltage (U) as well as instantaneous power in real-time. The digital energy meter is designed with an alarm function, which allows for self setting of alarm parameter thresholds. If the set threshold parameters are exceeded, the buzzer will alarm, effectively protecting the circuit. The electricity meter adopts a modular design, with the collection part divided into current collection module, voltage collection module, and power factor collection module. It is converted into digital signals that can be processed through the built-in A/D converter of the microcontroller STC15F2K60S2 chip, and the real-time measurement and display function of power parameters is achieved through the internal program operation of the microcontroller STC15F2K60S2 chip; The minimum system of the microcontroller integrates an LCD1602 LCD display module, which allows real-time viewing of power parameters through the LCD1602 LCD screen; The power module has two outputs, providing stable DC power supplies of DC5V and DC12V for the microcontroller module and the acquisition module, respectively. The STC15F2K60S2 chip can be equipped with an interrupt program, which can set alarm values at any time and convert them into readable power parameters based on collected data.<br>Keywords: microcontroller STC15F2K60S2; Digital energy meter; Energy metering; Power system;

abstract<br> 1. With the continuous improvement of industrial technology, the application of intelligent technology is more and more extensive. As the infrastructure of power industry, digital watt-hour meter has been widely used in the market in recent years. Under the trend of intelligence, the demand and application scope of digital watt-hour meter are also expanding. In this paper, the single chip microcomputer is selected as the core controller of STC15F2K60S2 to realize the design of digital watt-hour meter, and the feasibility of the design is verified by experiments.<br> 2. Firstly, this paper introduces the basic knowledge of digital watt-hour meter, including the basic principle of electric energy measurement, the classification, performance index and technical requirements of digital watt-hour meter. In particular, the principle and realization method of digital watt-hour meter realized by single chip microcomputer are expounded in detail. Secondly, this paper analyzes in detail the overall structure design of digital watt-hour meter and the realization methods of each part's functions, including circuit design, single chip microcomputer program design and communication protocol.<br> 3. According to the design requirements of the paper, the single-phase measurement can measure the effective values of current (I), voltage (U) and instantaneous power in real time. The digital watt-hour meter is designed with alarm function, which can set the alarm parameter threshold by itself, and the buzzer will alarm if it exceeds the set threshold parameter, thus effectively protecting the circuit. The watt-hour meter adopts modular design, and the acquisition part is divided into current acquisition module, voltage acquisition module and power factor acquisition module. It is converted into a digital signal that can be processed by the A/D converter of the single-chip microcomputer STC15F2K60S2, and the function of real-time measurement and display of power parameters is realized by the internal program operation of the single-chip microcomputer STC15F2K60S2. The minimum system of single chip microcomputer integrates LCD1602 liquid crystal display module, through which power parameters can be viewed in real time; The power supply module has two outputs, providing stable DC power supplies of DC5V and DC12V for the single chip microcomputer module and the acquisition module respectively. An interrupt program can be set inside the STC15F2K60S2 chip, and the alarm value can be set at any time, and converted into readable power parameters according to the collected data.<br> Key words: MCU STC15F2K60S2; Digital watt-hour meter; Energy measurement; Electric power system;