WO2022247087A1 - 一种智能电表的电能质量监测系统 - Google Patents

一种智能电表的电能质量监测系统 Download PDF

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Publication number
WO2022247087A1
WO2022247087A1 PCT/CN2021/121515 CN2021121515W WO2022247087A1 WO 2022247087 A1 WO2022247087 A1 WO 2022247087A1 CN 2021121515 W CN2021121515 W CN 2021121515W WO 2022247087 A1 WO2022247087 A1 WO 2022247087A1
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power
data
quality monitoring
monitoring system
interface
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PCT/CN2021/121515
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English (en)
French (fr)
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王宜怀
史洪玮
施连敏
喻炳政
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苏州大学
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Publication of WO2022247087A1 publication Critical patent/WO2022247087A1/zh

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    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
    • G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
    • G01R35/00—Testing or calibrating of apparatus covered by the other groups of this subclass
    • G01R35/04—Testing or calibrating of apparatus covered by the other groups of this subclass of instruments for measuring time integral of power or current

Definitions

  • the invention relates to the technical field of smart meters, in particular to a power quality monitoring system for smart meters.
  • the smart meter is the smart terminal of the smart grid.
  • the smart meter In addition to the basic power consumption measurement function of the traditional power meter, the smart meter also has two-way multi-rate metering functions, user-end control functions, and multi- Intelligent functions such as two-way data communication function of a data transmission mode, anti-stealing function, etc., smart meters represent the future development direction of energy-saving smart grid end-user intelligent terminals.
  • the invention provides a power quality monitoring system of a smart meter, comprising:
  • An electric energy collection terminal communicates with the cloud server through a base station, and the cloud server communicates directly with the human-computer interaction system;
  • the power collection terminal includes: a core board, an expansion board and an external sensor; wherein, the expansion board is connected to the core board through a GEC interface, and the expansion board is connected to an external sensor through a general interface; the core board includes an MCU and the MCU through a fixed interface The connected communication module; the expansion board includes a photosensitive sensor, a thermal sensor, a program download interface, a power interface, and a working indicator light; the external sensor includes an LCD display and a grid data sampling sensor;
  • the data of the electric energy collection terminal includes U2, U3, U4, U5 command frames.
  • the grid data sampling sensor adopts HT7036 metering chip.
  • the MCU adopts STM32L431 chip.
  • the communication module adopts ME3616 communication module.
  • the U2 command frame simultaneously displays the device operating status, power quality, and billing data.
  • the U3 command frame is used to display 2-38 harmonics.
  • the U4 command frame is used to display current, voltage, apparent power, apparent electric energy
  • the U5 command frame uploads power quality indicators, active power, reactive power, apparent power and power data.
  • the data frame format used by the power quality monitoring system is: frame header, data length, IMSI, valid data, checksum, and frame tail.
  • the invention has the advantages of being able to quickly build a power quality monitoring human-computer interaction system and improving the development efficiency of an embedded system.
  • the power quality monitoring system of the smart electric meter of the present invention can receive various data, and efficiently display the specified data to the user by using a graphical interface.
  • Fig. 1 shows a schematic diagram of the framework of a power quality monitoring system according to an embodiment of the present invention.
  • FIG. 2 shows a schematic diagram of the hardware configuration and basic functions of an electric energy collection terminal according to an embodiment of the present invention.
  • Figure 3 shows a schematic diagram of the data frame format of the power quality monitoring system.
  • Figure 4 shows a schematic diagram of the grid basic information interface.
  • Figure 5 shows a schematic diagram of the grid harmonic information interface.
  • Figure 6 shows a schematic diagram of the U3 command frame data interface.
  • Figure 8 shows a schematic diagram of the U4 command frame data interface.
  • Figure 10 shows a schematic diagram of the charging data interface corresponding to the U4 command frame.
  • Figure 11 shows a schematic diagram of the data interface corresponding to the U5 command frame.
  • the present invention first conducts an overall analysis on the power quality monitoring system, and clarifies the data processing logic and data receiving logic of the human-computer interaction system. Based on the AHL NB-IoT human-computer interaction system, the power quality human-computer interaction system is quickly built, and the cloud server and web page design of the power quality system are introduced in detail, and the main functional interface of the human-computer interaction system is given.
  • the power quality monitoring system reuses AHL NB-IoT architecture human-computer interaction software.
  • the framework of the power quality monitoring system is shown in Figure 1 below, including: power collection terminals, cloud servers, and human-computer interaction systems; The server communicates, and the cloud server directly communicates with the human-computer interaction system.
  • the power collection terminal of the present invention includes: a core board, an expansion board and an external sensor; wherein, the expansion board is connected to the core board through a GEC interface, and the expansion board is connected to an external sensor through a general interface; the core board includes an MCU And a communication module connected to the MCU through a fixed interface; the expansion board includes a photosensitive sensor, a thermal sensor, a program download interface, a power interface, and a working indicator light; the external sensors include an LCD display and a grid data sampling sensor.
  • the grid data sampling sensor adopts HT7036 metering chip.
  • the MCU adopts the STM32L431 chip.
  • the communication module adopts ME3616 communication module.
  • the power quality acquisition terminal adds U2, U3, U4, and U5 command frames to upload power grid quality information.
  • the U2 command frame uploads the most detailed information.
  • the U2 command frame contains all the fields of the U4 and U5 command frames.
  • the U3 command frame is mainly used to display the 2 ⁇ 38th harmonic.
  • the U4 command frame is mainly used to display the current, voltage and apparent power. , Apparent electric energy, which can be used for electric energy billing.
  • the U5 command frame uploads power quality indicators, active power, reactive power, apparent power and power data. The upload of active and reactive data can be used to judge whether the power equipment under test is working normally, and the power quality index can be used to judge the quality of the power grid.
  • the U2 command frame displays the device running status, power quality, and billing data at the same time.
  • the cloud server needs to add ⁇ command> ⁇ /command> key-value pairs, and the ⁇ frame> ⁇ /frame> tag needs to add grid data field tags, and the web page does not need to be changed.
  • the cloud server data receiving interface adds a harmonic data display area.
  • the cloud server calls the createLabel method, after recording the harmonic field, add a line graph in the specified area.
  • the onmessage event processing method on the web page is similar to this.
  • Electric energy data collection is mainly realized by external sensors.
  • the external sensors When the external sensors are used for voltage sampling, they use a voltage divider circuit and are connected in parallel to the three-phase power grid.
  • When collecting current data use a current transformer with a precision of 0.2. Compared with voltage transformers, the cost of voltage divider circuits is lower.
  • the direct access current sampling needs to be connected in series, which is difficult to access, so the current transformer is selected for sampling.
  • Use narrowband to upload data to the cloud server and users can directly access cloud data through web pages.
  • the use of narrowband communication reduces line costs. Users access cloud data through web pages, avoiding the installation of client programs, which is conducive to the promotion of the system.
  • the power quality cloud server Based on the AHL NB-IoT architecture, the power quality cloud server adds U2, U3, and U4 command frames to upload power grid quality information.
  • the data frame format used by the power quality monitoring system is: frame header (2 bytes), data length (2 bytes), IMSI (15 bytes), valid data (n bytes), checksum (2 bytes) , Frame end (2 bytes), the specific content is shown in Figure 3 below.
  • the cloud server further processes the structured data and displays the data in dynamic charts to improve data processing efficiency.
  • the U2 command frame used by the cloud server to communicate with the client corresponds to information on the content of the 2nd to 21st harmonics of various currents and voltages, and grid data information on various voltages, currents, and powers.
  • the U3 command frame contains the sub-harmonic content rate information of various currents and voltages of the power grid.
  • the HT7036 can measure up to the 41st harmonic information, but the maximum number of bytes that can be uploaded by the ME3616 narrowband communication module at a time is 512 bytes. It exceeds 512 bytes, and finally only uploads the 2 ⁇ 38th harmonic information (456 bytes), and the terminal information only uploads the IMSI number, sending time, chip temperature, etc. (30 bytes).
  • the U2 command frame used by the cloud server to communicate with the client is shown in Table 1 below.
  • the cloud server system does not make any changes, it will automatically generate a large number of text boxes.
  • Power grid harmonic information occupies 120 fields and uses 40 lines of space for display, which requires several page turning.
  • the automatically generated A-phase harmonic voltage content rate information almost occupies the real-time data display area of the cloud server, which is not conducive to users to extract effective information. Therefore, the real-time data display area is divided into two overlapping parts, one part displays basic information, and the other part displays harmonic information.
  • the harmonic content of the power grid system only needs to meet the national standard of no more than 2% for even times and no more than 4% for odd times.
  • Three-phase current and voltage 2 ⁇ 21 harmonic content rate contains 120 pieces of information, which is inconvenient to view in text form, so the harmonic information is displayed in the form of a line graph.
  • the improved cloud server interface corresponding to the U2 command frame is shown in Figure 4 and Figure 5 below.
  • Figure 4 mainly shows the information of current, voltage, power, electric energy, etc.
  • the combined phase current shown in Figure 4 is the vector sum of the A, B, and C three-phase currents, and the active power data is the product of voltage data, current data, and equipment power factor.
  • Figure 5 mainly shows the 2 ⁇ 21 harmonic information.
  • Harmonic standards for public power grids were released on July 31, 1993.
  • the standard stipulates that the 0.38kV nominal power grid should have an odd-order harmonic content of no more than 4%, and an even-order harmonic content of no more than 2% [51].
  • the frequency of the national grid is 50Hz, and the 1st harmonic is the fundamental wave, and its frequency is 50Hz, and the content rate is 100%.
  • the 2nd harmonic is 100Hz waveform; the nth harmonic is 50nHz waveform.
  • the ordinate in Figure 5 is ten-thousand points. Under normal circumstances, the peak section is the odd harmonic content rate, the left part is the three-phase voltage harmonic content rate, and the right part is the three-phase current harmonic content rate. The peak value in the figure should not exceed 400, and the valley value should not exceed 200. Otherwise, the grid harmonic content rate is abnormal.
  • the U3 command frame is mainly used to upload the detailed data information of the grid harmonics.
  • the basic information interface of the U3 command frame is shown in Figure 6 below.
  • the meter terminal can upload the 2 ⁇ 38th harmonic content rate information, and the corresponding interface is shown in Figure 7 below.
  • the image on the left side of the interface shows the harmonic content rate information of the three-phase voltage of A, B, and C
  • the image on the right side of the interface shows the information on the harmonic content rate of the three-phase current of A, B, and C.
  • the specific format of the U3 command frame for uploading 2 ⁇ 38th harmonic information is shown in Table 2 below.
  • the chip temperature in the U3 command frame can be used to judge whether the meter terminal is working normally, and the sending time can be used to query data information according to the time.
  • the U4 command frame is used for energy data billing, uploading current, voltage, power, and energy data, and the apparent power is the product of current and voltage.
  • the data fields corresponding to the U4 and U5 command frames are a subset of the U2 command frame, and the U4 and U5 command frame fields are not listed one by one.
  • the U4 command frame corresponds to the cloud server interface as shown in Figure 8 below.
  • the U5 command frame is used to upload power, electric energy data, and electric energy quality index data.
  • the active power, reactive power and apparent power are basically kept constant, and the user can judge the aging condition of the equipment according to the change of the power data.
  • the power quality can be judged based on voltage deviation and harmonic data.
  • the harmonic data processing logic of the U5 command frame is consistent with that of the U2 command frame and will not be described again.
  • the data interface corresponding to the U5 command frame is shown in Figure 9 below.
  • the power quality system is mainly realized by using XML language.
  • XML is an important markup language. It uses text format to represent structured data, and uses XML language to realize dynamic loading of web pages, which saves a lot of time for system development.
  • Power quality system design follows AHL NB-IoT architecture webpage design idea, data transmission logic is completely consistent, in the webpage display interface of power grid data corresponding to U2 command frame, the left side includes billing information such as current, voltage, power, electric energy, voltage fluctuation, and three-phase voltage imbalance Power quality index information such as degrees.
  • the right side is the data of the 2nd ⁇ 21st harmonic content rate of the phase voltage and current.
  • the terminal web program When the terminal web program successfully establishes a connection with the cloud server, when receiving the data sent by the cloud server, it will convert the JSON string into a JSON object, extract the valid information, and splice to generate a dynamically displayed web page interface.
  • the Highcharts component is introduced to display the harmonic content rate in the form of a visual line chart on the right side of the interface.
  • the implementation logic of other interfaces of the power quality system is similar to the real-time data display interface of the webpage.
  • the real-time interface of the power quality system also displays detailed harmonic data of the power grid.
  • the ordinate of the interface is the percentage data, and the broken lines of different colors represent different harmonic data.
  • the harmonic will be displayed The specific value corresponding to the content rate.
  • the billing data corresponding to the U4 command frame is shown in Figure 10 below.

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Abstract

一种智能电表的电能质量监测系统，包括：电能采集终端、云服务器、人机交互系统；电能采集终端通过基站与云服务器通信，云服务器与人机交互系统直接通信；电能采集终端包括：核心板、扩展板和外接传感器；其中，扩展板通过GEC接口连接核心板，扩展板通过通用接口连接外接传感器；核心板包括MCU及与MCU通过固定接口连接的通讯模组；扩展板包括光敏传感器、热敏传感器、程序下载接口、电源接口、和工作指示灯；外接传感器包括LCD显示器和电网数据采样传感器。能够快速搭建电能质量监测人机交互系统，提高嵌入式系统开发效率。智能电表的电能质量监测系统能够接收多种数据，并利用图形化界面将指定数据高效的展示给用户。

Description

一种智能电表的电能质量监测系统 技术领域
本发明涉及智能电表技术领域，具体涉及一种智能电表的电能质量监测系统。
 背景技术
我国电能表技术发展至今，已有70多年的历史。1952年上海和成电器厂开始专业生产电能表，当时以仿制国外感应系电能表为主。60年代初，我国开始自行设计电能表。70年代中后期，开始引进国外先进电能表的制造技术。90年代初，国产电子式电能表研制成功。近些年，电网资产和业务不断数据化，物联网技术正逐渐与电力设备感知技术深度融合，电网设备物联网系统开始出现，信息开始互联互通。
智能电表是智能电网的智能终端，智能电表除了具备传统电能表基本用电量的计量功能以外，为了适应智能电网和新能源的使用还具有双向多种费率计量功能、用户端控制功能、多种数据传输模式的双向数据通信功能、防窃电功能等智能化的功能，智能电表代表着未来节能型智能电网最终用户智能化终端的发展方向。
现有的智能电表，电能的质量监测往往依靠人工定期巡查来实现，尚没有智能的自动化监测方式。
 技术解决方案
本发明的目的是通过以下技术方案实现的。
本发明提供了一种智能电表的电能质量监测系统，包括：
电能采集终端、云服务器、人机交互系统；所述电能采集终端通过基站与云服务器通信，所述云服务器与人机交互系统直接通信；
所述电能采集终端包括：核心板、扩展板和外接传感器；其中，扩展板通过GEC接口连接核心板，扩展板通过通用接口连接外接传感器；所述核心板包括MCU及与所述MCU通过固定接口连接的通讯模组；所述扩展板包括光敏传感器、热敏传感器、程序下载接口、电源接口、和工作指示灯；外接传感器包括LCD显示器和电网数据采样传感器；
所述电能采集终端的数据包括U2、U3、U4、U5命令帧。
进一步地，所述电网数据采样传感器采用HT7036计量芯片。
进一步地，所述MCU采用STM32L431芯片。
进一步地，所述通讯模组采用ME3616通讯模组。
进一步地，所述U2命令帧将设备运行状态、电能质量、计费数据同时展示。
进一步地，所述U3命令帧用于展示2~38次谐波。
进一步地，所述U4命令帧用于展示电流、电压、视在功率、视在电能
进一步地，所述U5命令帧上传电能质量指标，有功、无功、视在功率及电能数据。
进一步地，所述电能质量监测系统使用的数据帧格式为：帧头、数据长度、IMSI、有效数据、校验和、以及帧尾。
 有益效果
本发明的优点在于：能够快速搭建电能质量监测人机交互系统，提高嵌入式系统开发效率。本发明的智能电表的电能质量监测系统能够接收多种数据，并利用图形化界面将指定数据高效的展示给用户。
 附图说明
通过阅读下文优选实施方式的详细描述，各种其他的优点和益处对于本领域普通技术人员将变得清楚明了。附图仅用于示出优选实施方式的目的，而并不认为是对本发明的限制。而且在整个附图中，用相同的参考符号表示相同的部件。在附图中：
附图1示出了根据本发明实施方式的电能质量监测系统框架示意图。
附图2示出了根据本发明实施方式的电能采集终端硬件构成及基本功能示意图。
附图3示出了电能质量监测系统数据帧格式示意图。
附图4示出了电网基础信息界面示意图。
附图5示出了电网谐波信息界面示意图。
附图6示出了U3命令帧数据界面示意图。
附图7示出了HT7036上传2~38次谐波信息展示界面示意图。
附图8示出了U4命令帧数据界面示意图。
附图9示出了U5命令帧数据界面示意图。
附图10示出了U4命令帧对应计费数据界面示意图。
附图11示出了U5命令帧对应数据界面示意图。
 本发明的实施方式
下面将参照附图更详细地描述本公开的示例性实施方式。虽然附图中显示了本公开的示例性实施方式，然而应当理解，可以以各种形式实现本公开而不应被这里阐述的实施方式所限制。相反，提供这些实施方式是为了能够更透彻地理解本公开，并且能够将本公开的范围完整的传达给本领域的技术人员。
本发明先对电能质量监测系统进行总体分析，厘清人机交互系统数据处理逻辑、数据接收逻辑。再以AHL NB-IoT人机交互系统为基础，快速搭建电能质量人机交互系统，并对电能质量系统的云服务器、网页设计等进行详细介绍，并给出人机交互系统的主要功能界面。
1 电能质量监测系统总体分析
电能质量监测系统复用AHL NB-IoT架构人机交互软件，电能质量监测系统框架如下图1所示，包括：电能采集终端、云服务器、人机交互系统；所述电能采集终端通过基站与云服务器通信，所述云服务器与人机交互系统直接通信。
如图2所示，本发明的电能采集终端，包括：核心板、扩展板和外接传感器；其中，扩展板通过GEC接口连接核心板，扩展板通过通用接口连接外接传感器；所述核心板包括MCU及与所述MCU通过固定接口连接的通讯模组；所述扩展板包括光敏传感器、热敏传感器、程序下载接口、电源接口、和工作指示灯；外接传感器包括LCD显示器和电网数据采样传感器。
所述电网数据采样传感器采用HT7036计量芯片。所述MCU采用STM32L431芯片。所述通讯模组采用ME3616通讯模组。
为进行快速开发，电能质量采集终端增加U2、U3、U4、U5命令帧，上传电网质量信息。U2命令帧上传的信息最为详细，U2命令帧包含U4、U5命令帧的全部字段，U3命令帧主要用于展示2~38次谐波，U4命令帧主要用于展示电流、电压、视在功率、视在电能，可用于电能计费。U5命令帧上传电能质量指标，有功、无功、视在功率及电能数据。有功、无功数据的上传，可用于判断被测电力设备是否正常工作，电能质量指标可用于判断电网质量。U2命令帧则将设备运行状态、电能质量、计费数据同时展示。为接收U2~U5命令帧，云服务器需增加<command></command>键值对，<frame></frame>标签需增加电网数据字段标签，网页无需改变。数据处理时，云服务器数据接收界面增加谐波数据显示区域，云服务器调用createLabel方法时，记录谐波字段后，在指定区域添加折线图。网页端onmessage事件处理方法，与此类似。
电能数据采集主要依靠外接传感器实现，外接传感器在进行电压采样时，使用分压电路，并联接入三相电网。进行电流数据采集时，使用0.2级精度的电流互感器。相对于电压互感器，分压电路的成本较低。直接接入式电流采样需使用串联方式，接入难度大，因此选择了电流互感器进行采样。使用窄带将数据上传到云服务器，用户通过网页直接访问云端数据。使用窄带通信方式，降低了线路成本。用户通过网页访问云端数据，避免安装客户端程序，有利于系统的推广。
2 电能质量系统云服务器设计
电能质量云服务器以AHL NB-IoT架构为基础，增加U2、U3，U4命令帧，用以上传电网质量信息。电能质量监测系统使用的数据帧格式为：帧头（2字节）、数据长度（2字节）、IMSI（15字节）、有效数据（n字节）、校验和（2字节）、帧尾（2字节），具体内容如下图3所示。
云服务器对结构化数据进行进一步处理，将数据以动态图表展现出来，提高数据处理效率。云服务器与客户端通信使用的U2命令帧对应包含各项电流、电压2~21次谐波含有率信息，各项电压、电流、功率等的电网数据信息。
U3命令帧包含电网各项电流、电压的次谐波含有率信息。HT7036最高可测得41次谐波信息，但ME3616窄带通讯模组单次可上传的最大字节数为512字节，电网各项41次谐波含有率信息与终端信息、帧格式信息组合远超512字节，最终只上传2~38次谐波信息（456字节），终端信息只上传IMSI号、发送时间、芯片温度等（30字节）。
云服务器与客户端通信使用的U2命令帧，具体内容如下表1所示。
Figure 450370dest_path_image001
Figure 741674dest_path_image002
U2命令帧对应的数据字段较多，云服务器系统如果不做出改变，会自动生成大量文本框。电网谐波信息占据120个字段，使用40行的空间进行显示，需要数次翻页。自动生成的A相谐波电压含有率信息，几乎占据云服务器实时数据展示区域，不利于用户提取有效消息。故将实时数据显示区域分为重叠的两部分，一部分显示基础信息，一部分显示谐波信息。
此外，电网系统谐波含有率只需满足偶次不超过2%，奇次不超过4%的国家标准。三相电流、电压2~21次谐波含有率包含120条信息，以文本形式不方便查看，故以折线图的形式展示谐波信息。U2命令帧对应的改进后的云服务器界面如下图4、图5所示。图4主要展示电流、电压、功率、电能等的信息。图4所示的合相电流为A、B、C三相电流的矢量和，有功功率数据为电压数据、电流数据、设备功率因子三者的乘积。
图5主要展示2~21次谐波信息。公用电网谐波标准于1993年7月31日发布，标准规定0.38kV标称电网，奇次谐波含有率不得超过4%，偶次谐波含有率不得超过2%[51]。国家电网频率为50Hz，1次谐波，即基波，其频率即50Hz含有率为100%。2次谐波，即100Hz波形；n次谐波，即50nHz波形。
图5纵坐标为万分制，正常情况下，波峰段为奇次谐波含有率，左部为三相电压谐波含有率，右部为三相电流谐波含有率。图中波峰数值不应超过400，波谷数值不应超过200。否则，电网谐波含有率出现异常。
U3命令帧主要用于上传电网谐波详细数据信息，U3命令帧的基础信息界面如下图6所示。
电表终端可上传2~38次谐波含有率信息，所对应界面如下图7所示。界面左侧图展示的为A、B、C三相电压谐波含有率信息，界面右侧图为A、B、C三相电流谐波含有率信息。
上传2~38次谐波信息的U3命令帧具体格式如下表2所示。U3命令帧中的芯片温度可以用于判断电表终端是否正常工作，发送时间可用于根据时间查询数据信息。
Figure 602183dest_path_image003
U4命令帧用于电能数据计费，上传电流、电压、功率、电能数据，视在功率为电流电压乘积。U4、U5命令帧对应数据字段为U2命令帧的子集，U4、U5命令帧字段不再一一列出，U4命令帧对应云服务器界面如下图8所示。
U5命令帧用于上传功率、电能数据、电能质量指标数据。电力设备正常工作时，有功功率、无功功率、视在功率，基本保持恒定，用户可根据功率数据变化判断设备老化情况。电能质量情况可依据电压偏差、谐波数据进行判断。U5命令帧的谐波数据处理逻辑与U2命令帧一致，不再描述，U5命令帧对应的数据界面如下图9所示。
3 电能质量系统
电能质量系统主要使用XML语言实现，XML是一种重要的标记语言，它使用文本格式表示结构化的数据，使用XML语言实现了网页的动态加载，为系统开发节省了大量时间。电能质量系统设计沿袭AHL NB-IoT架构网页设计思路，数据传输逻辑完全一致，U2命令帧对应的电网数据的网页展示界面中，左侧包含电流、电压、功率、电能等计费信息及电压波动、三相电压不平衡度等电能质量指标信息。右侧为分相电压、电流的2~21次谐波含有率数据。
与云服务器成功建立连接的终端网页程序，在收到云服务器发送的数据时，会将JSON字符串转换成JSON对象，并提取其中的有效信息，拼接生成动态显示的网页界面。
为了避免大量文本框自动出现，用户无法及时获取有效信息的局面出现，引入Highcharts构件，将谐波含有率以可视化折线图的形式显示界面右侧。
电能质量系统其它界面实现逻辑与网页实时数据展示界面类似，电能质量系统实时界面还对电网详细谐波数据进行了展示。使用HT7036芯片的终端上传的U3命令帧对应的数据界面中，界面的纵坐标为百分制数据，不同颜色折线代表不同的谐波数据，鼠标点到折线图上的某个点时，会显示谐波含有率对应的具体数值。
U4命令帧对应的计费数据展示如下图10所示。
U5命令帧对应的设备有功无功数据，电能质量数据如下图11所示。
以上所述，仅为本发明较佳的具体实施方式，但本发明的保护范围并不局限于此，任何熟悉本技术领域的技术人员在本发明揭露的技术范围内，可轻易想到的变化或替换，都应涵盖在本发明的保护范围之内。因此，本发明的保护范围应以所述权利要求的保护范围为准。

Claims (9)

  1. 一种智能电表的电能质量监测系统，其特征在于，包括：电能采集终端、云服务器、人机交互系统；所述电能采集终端通过基站与云服务器通信，所述云服务器与人机交互系统直接通信；所述电能采集终端包括：核心板、扩展板和外接传感器；其中，扩展板通过GEC接口连接核心板，扩展板通过通用接口连接外接传感器；所述核心板包括MCU及与所述MCU通过固定接口连接的通讯模组；所述扩展板包括光敏传感器、热敏传感器、程序下载接口、电源接口、和工作指示灯；外接传感器包括LCD显示器和电网数据采样传感器；所述电能采集终端的数据包括U2、U3、U4、U5命令帧。
  2. 根据权利要求1所述的一种电能质量监测系统，其特征在于，所述电网数据采样传感器采用HT7036计量芯片。
  3. 根据权利要求1所述的一种电能质量监测系统，其特征在于，所述MCU采用STM32L431芯片。
  4. 根据权利要求1所述的一种电能质量监测系统，其特征在于，所述通讯模组采用ME3616通讯模组。
  5. 根据权利要求1所述的一种电能质量监测系统，其特征在于，所述U2命令帧将设备运行状态、电能质量、计费数据同时展示。
  6. 根据权利要求1所述的一种电能质量监测系统，其特征在于，所述U3命令帧用于展示2~38次谐波。
  7. 根据权利要求1所述的一种电能质量监测系统，其特征在于，所述U4命令帧用于展示电流、电压、视在功率、视在电能。
  8. 根据权利要求1所述的一种电能质量监测系统，其特征在于，所述U5命令帧上传电能质量指标，有功、无功、视在功率及电能数据。
  9. 根据权利要求5-8任意一项所述的一种电能质量监测系统，其特征在于，所述电能质量监测系统使用的数据帧格式为：帧头、数据长度、IMSI、有效数据、校验和、以及帧尾。
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