Three-phase intelligent electric energy meter based on IR46 standard

Abstract

The invention discloses a three-phase intelligent electric energy meter based on an IR46 standard, which comprises a shell, a light guide type liquid crystal display screen, a USB (Universal Serial Bus) interface, an auxiliary wiring terminal strip and a main wiring terminal strip are arranged on the surface of the shell, and a metering core module, a management core module, a power supply module, a relay and a mutual inductor are arranged in the shell. A terminal temperature measuring element is arranged on the main wiring terminal strip in the shell; the power supply module is electrically connected with the metering core module and the management core module; and power supply isolation modules are arranged between the metering core module and the power supply module and between the management core module and the power supply module. The system has the advantages that the design thought that the metering core module and the management core module are mutually independent is adopted; the on-site inspection frequency can be effectively reduced, and high economic benefits and social benefits are achieved; the intelligent power grid construction demand is responded, and the reliability and stability of electric power utilization are ensured.

Description

Technical Field:

[0001] The present invention relates to a three-phase intelligent electricity meter based on the IR46 standard in the field of electric power metering. Background Art:

[0002] Intelligent electricity meters are mainly used as metering devices. After ten years of promotion, they have successfully realized the transformation of power supply enterprises from manual meter reading to automated and intelligent meter reading, obtaining more detailed and accurate electricity consumption data. However, they do not yet have the characteristics of separating metering performance and management functions, high-resolution storage of big data, load identification, high-speed information processing, and communication. Therefore, carrying out modular design based on the IR46 standard, separating the software and hardware of the metering part and other parts, and enabling new functions to be flexibly configured for later development modules is the need for the development of the power market.

[0003] IR46: International Recommendation 46, the international recommendation for active energy meters. Summary of the Invention:

[0004] The purpose of the present invention is to provide a three-phase intelligent electricity meter based on the IR46 standard with the separation of software and hardware between the metering part and other parts.

[0005] The present invention is implemented by the following technical solution: A three-phase intelligent electricity meter based on the IR46 standard, which includes a housing. On the surface of the housing, there are a light-guided liquid crystal display screen, an auxiliary wiring terminal row, and a main wiring terminal row from top to bottom. Inside the housing, there are a metering core module, a management core module, a power supply module, and a current transformer. The power supply module is electrically connected to the metering core module and the management core module. Power isolation modules are provided between the metering core module and the management core module and the power supply module. The metering core MCU of the metering core module is connected to the management core MCU of the management core module through SPI communication, with the management core module as the master and the metering core module as the slave. The management core MCU is optically isolated and electrically connected to the auxiliary wiring terminal row.

[0006] Preferably, the management core module includes the management core MCU and a Bluetooth communication module. The management core MCU is electrically connected to the light-guided liquid crystal display screen.

[0007] Preferably, a replaceable clock battery electrically connected to the metering core MCU is provided on the housing.

[0008] Advantages of the present invention: Compared with the prior art, the design concept of mutual independence between the metering core module and the management core module is adopted; the metering core module realizes the legal metering function and conducts data interaction with the management core module; the management core module realizes functions such as display, external communication, event recording, data freezing, load control, etc.; the software of the management core can be remotely upgraded, and the metering performance can be monitored, effectively solving problems such as metering inaccuracy monitoring and electricity use safety; it can effectively reduce the on-site inspection frequency and has high economic and social benefits; it responds to the needs of smart grid construction and ensures the reliability and stability of power consumption. BRIEF DESCRIPTION OF THE DRAWINGS:

[0009] Figure 1 It is a schematic diagram of the panel of the present invention.

[0010] Figure 2 It is a schematic diagram of the internal structure of the present invention.

[0011] Figure 3 It is a wiring schematic diagram of the main wiring terminal block.

[0012] Figure 4 It is a wiring schematic diagram of the auxiliary wiring terminal block.

[0013] Figure 5 It is a connection schematic diagram of the management core module of the present invention.

[0014] Figure 6 It is a connection schematic diagram of the metering core MCU of the present invention. DETAILED DESCRIPTION OF THE INVENTION:

[0015] Embodiment:

[0016] As Figures 1 to 5 shown, a three-phase smart electricity meter based on the IR46 standard includes a housing, on the surface of the housing 1, there are a light guide type liquid crystal display screen 2, an auxiliary wiring terminal block, and a main wiring terminal block 3 from top to bottom.

[0017] The terminals on the auxiliary wiring terminal block are connected by reed switches; inside the housing 1, there are a metering core module 4, a management core module 5, a power supply module 6, and a current transformer 7.

[0018] The management core module 5 includes a management core MCU 51 and a Bluetooth communication module 52. The Bluetooth communication module 52 supports interconnection and interoperability, and its communication service follows the UUID standard protocol. The Bluetooth communication module supports the two-master and three-slave working mode and enables concurrent data communication with 2 masters and 3 slaves simultaneously. When the Bluetooth communication module communicates, the metering performance of the electric energy meter, the stored metering data and parameters will not be affected or changed. The Bluetooth MAC address adopts the static address in the Bluetooth random address type and maintains a one-to-one correspondence with the communication address of the electric energy meter. The Bluetooth of the electric energy meter has strong anti-interference ability and good compatibility. The management core MCU 51 is electrically connected to the light-guided liquid crystal display screen 2.

[0019] The power supply module 6 is electrically connected to the metering core module 4 and the management core module 5. Power isolation modules are provided between the metering core module 4 and the management core module 5 and the power supply module 6. The metering core MCU 41 of the metering core module 4 is connected to the management core MCU 51 through SPI communication. The management core module 5 is the master and the metering core module 4 is the slave. The management core MCU 51 is electrically connected to the auxiliary wiring terminal block through opto-isolation. A replaceable clock battery 9 electrically connected to the metering core MCU 41 is provided on the housing 1. The clock battery 9 ensures that the clock of the electric energy meter can still provide the correct time after a long-term power outage.

Claims

1. A three-phase intelligent electricity meter based on the IR46 standard, characterized in that, it includes a housing, on the surface of the housing, there are a light-guided liquid crystal display screen, an auxiliary wiring terminal row, and a main wiring terminal row from top to bottom. Inside the housing, there are a metering core module, a management core module, a power supply module, and an instrument transformer. The power supply module is electrically connected to the metering core module and the management core module; power isolation modules are provided between the metering core module and the management core module and the power supply module; the metering core MCU of the metering core module and the management core MCU of the management core module are connected by SPI communication, and the management core MCU is optically isolated and electrically connected to the auxiliary wiring terminal row.

2. The three-phase intelligent electricity meter based on the IR46 standard according to claim 1, characterized in that, the management core module includes the management core MCU and a Bluetooth communication module; the management core MCU is electrically connected to the light-guided liquid crystal display screen.

3. The three-phase intelligent electricity meter based on the IR46 standard according to claim 1, characterized in that, a replaceable clock battery electrically connected to the metering core MCU is provided on the housing.

4. The three-phase intelligent electricity meter based on the IR46 standard according to claim 1, characterized in that, the terminals on the auxiliary wiring terminal row are connected by reed pieces.

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