Non-intrusive load monitoring system based on measurement switch

Abstract

The utility model provides a non-intrusive load monitoring system based on a measurement switch, and belongs to the technical field of electric power monitoring. The system is composed of a computer terminal, a server, a mobile phone terminal, a concentrator, an intelligent measurement switch and at least one acquisition terminal. The computer terminal is electrically connected with the mobile phone terminal and the server, the server is in wireless communication with the concentrator, the concentrator, the intelligent measurement switch and the acquisition terminal are sequentially communicated, and the acquisition terminal is connected with a load line. The intelligent measuring switch, the acquisition terminal and the concentrator comprise a plurality of corresponding functional units. According to the utility model, non-intrusive monitoring is adopted, line reconstruction is avoided, equipment installation and maintenance cost is reduced, and stable operation of an electric power system is guaranteed. Collected electric energy signals are combined with multiple communication modes to achieve real-time data transmission, a power network is fully covered, and abnormity is found in time. Meanwhile, the ESAM encryption chip guarantees data safety, and the line protection unit and the field alarm unit can effectively protect electrical equipment and remind workers to process faults.

Description

Technical Field

[0001] This utility model relates to the field of power monitoring technology, specifically a non-intrusive load monitoring system based on a measuring switch. Background Technology

[0002] In the field of power monitoring technology, traditional load monitoring methods have many limitations. As the scale of power systems continues to expand and users' requirements for power reliability increase, these problems become increasingly prominent.

[0003] First, traditional invasive load monitoring methods often require the separate installation of monitoring equipment on each line or on each electrical device. This is not only cumbersome and complex, but also involves high costs for equipment purchase, installation, and maintenance. In large-scale power networks, this high-cost monitoring method places a heavy economic burden on power companies and users, limiting its widespread application.

[0004] Secondly, intrusive monitoring requires the modification of power lines or the connection of additional equipment, which may affect the normal operation of the power system. The installation process may damage the original line structure, increasing the risk of line faults, and the connection of the equipment may interfere with power signals, affecting the stability and reliability of the power system.

[0005] Furthermore, some traditional monitoring methods cannot acquire power data in real time, and data transmission delays make it difficult to detect anomalies in the power system promptly. The monitoring scope is also limited, making it difficult to comprehensively cover and analyze the entire power network, thus failing to meet the needs for refined management and efficient operation of the power system.

[0006] These issues have prompted the industry to seek a more efficient, lower-cost, non-intrusive, and more powerful load monitoring system to meet the needs of modern power system development. Utility Model Content

[0007] The technical problem to be solved by this utility model is to provide a non-intrusive load monitoring system based on a measuring switch, which aims to overcome the shortcomings of traditional load monitoring methods such as high cost, impact on power system operation, and untimely and incomplete data acquisition, so as to achieve efficient, low-cost, stable and reliable monitoring of the power system and meet the needs of modern power system refined management and efficient operation.

[0008] To solve the above-mentioned technical problems, the embodiments of this utility model provide the following technical solutions:

[0009] A non-intrusive load monitoring system based on a measuring switch includes a computer terminal, a server, a mobile terminal, a concentrator, an intelligent measuring switch, and at least one data acquisition terminal. The computer terminal and mobile terminal are electrically connected to the server. The server and concentrator are wirelessly connected. The concentrator and intelligent measuring switch are communicatively connected. The intelligent measuring switch and at least one data acquisition terminal are communicatively connected. The at least one data acquisition terminal is connected to at least one load line. The intelligent measuring switch includes a microcontroller and a metering unit, an HPLC communication unit, an RS485 communication module, a Bluetooth communication unit, an ESAM encryption chip, a voltage / current acquisition unit, a field alarm unit, and a line protection unit electrically connected to the microcontroller. The voltage / current acquisition unit is electrically connected to the metering unit.

[0010] Optionally, the data acquisition terminal includes a voltage acquisition circuit, a current acquisition circuit, an energy metering chip, a first microcontroller chip, and a first communication module. The voltage acquisition circuit and the current acquisition circuit are electrically connected to the energy metering chip, the energy metering chip is electrically connected to the first microcontroller chip, and the first microcontroller chip is electrically connected to the first communication module.

[0011] Optionally, the concentrator includes a second microcontroller chip, a second communication module, a wireless communication module, and a memory, wherein the second microcontroller chip is electrically connected to the second communication module, the wireless communication module, and the memory.

[0012] Optionally, the on-site alarm unit is an audible and visual alarm.

[0013] Optionally, the line protection unit is a relay.

[0014] Optionally, the second microcontroller chip is an STM32 series microcontroller, and the second communication module is a 485 communication module.

[0015] Optionally, the first microcontroller chip is an STM32 series microcontroller, and the first communication module is a 485 communication module.

[0016] Optionally, the power metering chip is model ATT7053BU.

[0017] Optionally, the wireless communication module is an LTE-4G communication module.

[0018] The above-described technical solution of this utility model has at least the following beneficial effects:

[0019] The above solution employs a non-intrusive monitoring method, eliminating the need to install complex monitoring equipment on each line or on each electrical device. By using intelligent measurement switches in conjunction with multiple data acquisition terminals, monitoring of multiple load lines can be achieved simply by deploying equipment at key nodes. This significantly reduces the costs of equipment purchase, installation, and maintenance, alleviating the economic burden on power companies and users.

[0020] The non-intrusive design avoids the need to modify power lines or connect additional equipment, does not damage the original line structure, reduces the risk of line faults caused by the installation of monitoring equipment, and reduces interference with power signals, thereby ensuring the stability and reliability of the power system and enabling the power system to operate normally and efficiently.

[0021] The collected electrical signals, combined with multiple communication methods, can transmit monitoring data to the server in real time, enabling real-time data acquisition. At least one acquisition terminal is connected to at least one load line, achieving comprehensive coverage of the entire power network and ensuring that the acquired data is comprehensive and accurate, providing strong support for the timely detection of power system anomalies. Attached Figure Description

[0022] Figure 1 This is a block diagram of the control system principle of this utility model;

[0023] Figure 2 This is a block diagram illustrating the principle of the measuring switch of this utility model;

[0024] Figure 3 This is a block diagram illustrating the principle of the data acquisition terminal of this utility model;

[0025] Figure 4 This is a block diagram illustrating the principle of the concentrator of this utility model. Detailed Implementation

[0026] To make the technical problems, technical solutions and advantages of this utility model clearer, a detailed description will be given below in conjunction with the accompanying drawings and specific embodiments.

[0027] like Figure 1 As shown, a non-intrusive load monitoring system based on a measuring switch includes a computer terminal 1, a server 2, a mobile terminal 3, a concentrator 4, an intelligent measuring switch 5, and at least one data acquisition terminal 6. The computer terminal 1 and the mobile terminal 3 are electrically connected to the server 2, the server 2 is wirelessly connected to the concentrator 4, the concentrator 4 is communicatively connected to the intelligent measuring switch 5, the intelligent measuring switch 5 is communicatively connected to at least one data acquisition terminal 6, and the at least one data acquisition terminal 6 is connected to at least one load line 7.

[0028] like Figure 2As shown, the intelligent measurement switch 5 includes a microcontroller 51, and a metering unit 52, an HPLC communication unit 53, an RS485 communication module 54, a Bluetooth communication unit 55, an ESAM encryption chip 56, a voltage / current acquisition unit 57, a field alarm unit 58, and a line protection unit 59, all electrically connected to the microcontroller 51. The voltage / current acquisition unit 57 is electrically connected to the metering unit 53.

[0029] The metering unit 52 is a three-phase metering chip, such as the ADE7758ARWZ, which measures various three-phase electrical energy parameters. The HPLC communication unit 53 is used for power line carrier communication, and the RS485 communication module 54 enables RS485 communication with the acquisition terminal and concentrator, realizing the "upload and download" function of power data. The Bluetooth communication unit 55 can communicate with smart terminals such as mobile phones via Bluetooth.

[0030] The ESAM encryption chip 56 has a large-capacity secure storage area, which can reliably store various key data in the power system, such as user electricity consumption information, power grid equipment parameters, encryption keys, etc., to prevent user electricity consumption information and key power grid parameters from being illegally stolen or tampered with.

[0031] The voltage / current acquisition unit 57 is used to acquire voltage and current signals from at least one acquisition terminal. The on-site alarm unit 58 is an audible and visual alarm used to issue an audible and visual alarm when abnormal voltage or current is detected. The line protection unit 59 is a relay used for line fault protection. When a circuit fault occurs, such as an overload lasting for a set duration or a short circuit, the microprocessor controls the relay to quickly disconnect the circuit, thus protecting the electrical equipment. Simultaneously, the on-site alarm unit 58 issues an audible and visual alarm to alert personnel to the abnormal circuit situation.

[0032] like Figure 3 As shown, the acquisition terminal 6 includes a voltage acquisition circuit, a current acquisition circuit, an energy metering chip, a first microcontroller chip, and a first communication module. The voltage acquisition circuit and the current acquisition circuit are electrically connected to the energy metering chip, the energy metering chip is electrically connected to the first microcontroller chip, and the first microcontroller chip is electrically connected to the first communication module.

[0033] The first microcontroller chip is an STM32 series microcontroller, the first communication module is a RS485 communication module, and the energy metering chip is an ATT7053BU. The ATT7053BU is a high-precision single-phase multi-functional metering chip with SPI and UART communication interfaces. The acquisition terminal 6 collects energy signals such as current, voltage, and power signals from the corresponding load lines. The ATT7053BU simultaneously obtains energy metering parameters such as active and reactive power from two metering channels, with a maximum sampling frequency of 14.4 kHz. The STM32 series microcontroller reads the energy metering parameters calculated by the ATT7053BU in real time through the high-speed SPI interface, realizing load monitoring, and converts the monitoring signal into RS485 communication via the UART interface to send it to the intelligent measurement switch 5.

[0034] like Figure 4 As shown, the concentrator 4 includes a second microcontroller chip, a second communication module, a wireless communication module, and a memory. The second microcontroller chip is electrically connected to the second communication module, the wireless communication module, and the memory.

[0035] The second microcontroller chip is an STM32 series microcontroller, the second communication module is a 485 communication module, the wireless communication module is an LTE-4G communication module, and the memory is a W29N02GV FLASH memory. After the intelligent measurement switch 5 comprehensively monitors the power data collected by each acquisition terminal 6, it sends the monitoring data to the 485 communication module of the concentrator 4 through the 485 interface, and finally wirelessly sends it to the server 2 through the LTE-4G communication module. Users can monitor the data through a computer terminal or a mobile phone terminal.

[0036] The above description is the preferred embodiment of this utility model. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the principle of this utility model, and these improvements and modifications should also be considered within the protection scope of this utility model.

Claims

1. A non-intrusive load monitoring system based on a measuring switch, characterized in that, The system includes a computer terminal, a server, a mobile terminal, a concentrator, an intelligent measurement switch, and at least one data acquisition terminal. The computer terminal and mobile terminal are electrically connected to the server. The server and concentrator are wirelessly connected. The concentrator and intelligent measurement switch are communicatively connected. The intelligent measurement switch and at least one data acquisition terminal are communicatively connected. The at least one data acquisition terminal is connected to at least one load line. The intelligent measurement switch includes a microcontroller and a metering unit, an HPLC communication unit, an RS485 communication module, a Bluetooth communication unit, an ESAM encryption chip, a voltage / current acquisition unit, a field alarm unit, and a line protection unit electrically connected to the microcontroller. The voltage / current acquisition unit is electrically connected to the metering unit.

2. The non-intrusive load monitoring system based on a measuring switch according to claim 1, characterized in that, The data acquisition terminal includes a voltage acquisition circuit, a current acquisition circuit, an energy metering chip, a first microcontroller chip, and a first communication module. The voltage acquisition circuit and the current acquisition circuit are electrically connected to the energy metering chip, the energy metering chip is electrically connected to the first microcontroller chip, and the first microcontroller chip is electrically connected to the first communication module.

3. The non-intrusive load monitoring system based on a measuring switch according to claim 1, characterized in that, The concentrator includes a second microcontroller chip, a second communication module, a wireless communication module, and a memory. The second microcontroller chip is electrically connected to the second communication module, the wireless communication module, and the memory.

4. The non-intrusive load monitoring system based on a measuring switch according to claim 1, characterized in that, The on-site alarm unit is an audible and visual alarm.

5. The non-intrusive load monitoring system based on a measuring switch according to claim 1, characterized in that, The line protection unit is a relay.

6. The non-intrusive load monitoring system based on a measuring switch according to claim 2, characterized in that, The first microcontroller chip is an STM32 series microcontroller, and the first communication module is a 485 communication module.

7. The non-intrusive load monitoring system based on a measuring switch according to claim 3, characterized in that, The second microcontroller chip is an STM32 series microcontroller, and the second communication module is a 485 communication module.

8. The non-intrusive load monitoring system based on a measuring switch according to claim 2, characterized in that, The power metering chip is model ATT7053BU.

9. The non-intrusive load monitoring system based on a measuring switch according to claim 3, characterized in that, The wireless communication module is an LTE-4G communication module.

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