Electric power acquisition control smart terminal

Abstract

The invention discloses an electric power acquisition control intelligent terminal which comprises a shell, a light guide type liquid crystal display screen, a USB interface, a carrier wave strong current coupling interface, an auxiliary wiring terminal strip and a main wiring terminal strip are arranged on the surface of the shell from top to bottom, and a power supply metering module, a main control module and a backup power supply are arranged in the shell. The system has the advantages that hardware modularization, system platformization and function software design are adopted; original common transformers, special transformers, distribution network terminals, large client terminals, transformer substation terminals and other products can be replaced, and functions which can be achieved by original five products can be achieved through free combination of the modules; operation and maintenance training and labor cost are saved, equipment specifications can be reduced, and the asset utilization rate is improved. And the terminal metering module and the management module adopt a physical separation principle.

Description

Technical Field:

[0001] The present invention relates to a power acquisition control intelligent terminal in the field of power metering. Background Art:

[0002] In a power supply and distribution system, a distribution transformer monitoring terminal (TTU) is used for information acquisition and control of a distribution transformer.

[0003] Existing distribution transformer monitoring terminal devices have a single structure form, fixed function configuration, and low resource configuration, making it difficult to meet the personalized installation and use requirements of various acquisition sites. With the development of the power grid, it is difficult to meet the application requirements in terms of safety, energy, and function expansion. Summary of the Invention:

[0004] The purpose of the present invention is to provide a power acquisition control intelligent terminal with software and hardware separation between the metering part and other parts.

[0005] The present invention is implemented by the following technical solution: A power acquisition control intelligent terminal includes a housing. On the surface of the housing, a light guide type liquid crystal display screen, a USB interface, a carrier strong electricity coupling interface, an auxiliary wiring terminal block, and a main wiring terminal block are provided from top to bottom. Inside the housing, a power metering module, a main control module, and a backup power supply are provided. The power metering module and the main control module are electrically connected; a power isolation module is provided between the power metering module and the main control module; the power metering module and the main control module are connected by SPI communication; the management core MCU is connected to the USB interface and the carrier strong electricity coupling interface, and a function module is detachably plugged on the USB interface; the main control module is optically isolated and electrically connected to the auxiliary wiring terminal block.

[0006] Preferably, the main control module is electrically connected to the light guide type liquid crystal display screen.

[0007] Preferably, a backup power supply electrically connected to the main control module is provided inside the housing, and the backup power supply is a super capacitor and a replaceable clock battery.

[0008] Preferably, the terminals on the auxiliary wiring terminal block are connected by reed pieces.

[0009] Preferably, the function module includes but is not limited to a local communication module, a wireless remote communication module, a branch circuit monitoring module, an RS-485 module, a DC analog quantity module, a load control module, and a USB to network module.

[0010] Advantages of the present invention: Compared with the prior art, it adopts hardware modularization, system platformization, and functional software design; it can replace the original public transformer, special transformer, distribution network terminal, large customer terminal, substation terminal and other products, and through the free combination of modules, realize the functions that could only be achieved by the original 5 products; it saves operation and maintenance training and labor costs, can reduce equipment specifications, correspondingly reduce safety inventory, improve asset utilization rate, and theoretically make the inventory become 1 / 5 of the original. The terminal metering module and the management module adopt the principle of physical separation. The power metering module supplies the normal operation of the whole terminal and realizes an independent metering function at the same time; the main control module is the core unit for display and business processing; it is required that the terminal can meet the personalized installation and use requirements of various collection sites, such as power consumption information collection, water, gas, heat meter data collection, distributed power access, electric vehicle collection, smart home application, demand side management, etc.; it adopts full voltage (57.7~380V) and wide current design (0.3(80)A), and in terms of structure, it adopts modular design and designs the terminal into a modular structure type with multiple independent functions. The management module communicates with each module through the USB bus; the terminal adopts a method of communicating with each functionally independent module through the USB bus, solves the problem that the existing terminal can only communicate with one master station, and realizes the application of the terminal communicating with multiple master stations in the substation environment; it is designed that three-phase voltage and three-phase current are introduced into the terminal through PT and CT, and through a high-precision sampling chip, 144-point sampling data per cycle is obtained, and the data accuracy is 19bit to obtain the instantaneous sampling value. The flicker detection algorithm is used to analyze power quality indexes such as power grid harmonics, voltage sags, voltage swells, voltage fluctuations, flicker, positive sequence, and negative sequence. It can effectively prevent poor power quality from affecting the operation of power electronic equipment and special loads such as data control centers, medical institutions, and related equipment in the machinery manufacturing industry. Description of the drawings:

[0011] Figure 1 It is a schematic diagram of the panel of the present invention.

[0012] Figure 2 It is a wiring schematic diagram of the auxiliary wiring terminal block and the main wiring terminal block.

[0013] Figure 3 It is a schematic block diagram of the system connection of the present invention. Detailed implementation manners:

[0014] Embodiment:

[0015] Such as Figures 1 to 3As shown in the figure, a smart terminal for power collection control includes a housing 1. On the surface of the housing 1, there are a light-guided liquid crystal display screen 2, a USB interface 3, a carrier strong electric coupling interface 4, an auxiliary wiring terminal block 5, and a main wiring terminal block 6 from top to bottom. Inside the housing 1, there are a power metering module 7, a main control module 8, and a backup power supply 9. Among them, the power metering module 7 supplies power for the normal operation of the entire terminal and at the same time realizes an independent metering function; the main control module 8 is the core unit for display and service processing; the terminals on the auxiliary wiring terminal block 5 are connected by reed pieces; the power metering module 7 and the main control module 8 are electrically connected; there is a power isolation module between the power metering module 7 and the main control module 8; the power metering module 7 and the main control module 8 are connected by SPI communication; the main control module 8 is connected to the USB interface 3 and the carrier strong electric coupling interface 4, and a function module 10 is detachably plugged on the USB interface 3; the function module 10 includes but is not limited to a local communication module, a wireless remote communication module, a branch circuit monitoring module, an RS-485 module, a DC analog quantity module, a load control module, and a USB to network module; the main control module 8 is optically isolated and electrically connected to the auxiliary wiring terminal block 5; the main control module 8 is electrically connected to the light-guided liquid crystal display screen 2; inside the housing 1, there is a backup power supply 11 electrically connected to the main control module 8, and the backup power supply is a super capacitor and a replaceable clock battery; Super capacitor: It supplies power for the terminal to continue working for several minutes after a power outage to report the power outage event and prepare for shutdown; Clock battery: It ensures that the clock of the terminal can still provide the correct time after a long-term power outage.

[0016] The components of the power metering module 7, the main control module 8, the backup power supply 11, and the function module 10 are physically isolated.

Claims

1. A smart terminal for power collection control, characterized in that, it includes a housing, on the surface of the housing, there are a light guide type liquid crystal display screen, a USB interface, a carrier strong electricity coupling interface, an auxiliary wiring terminal row, and a main wiring terminal row from top to bottom. Inside the housing, there are a power metering module, a main control module, and a backup power supply. The power metering module and the main control module are electrically connected; a power isolation module is provided between the power metering module and the main control module; the power metering module and the main control module are connected by SPI communication; the management core MCU is connected to the USB interface and the carrier strong electricity coupling interface, and a function module is detachably plugged on the USB interface; the main control module is optically isolated and electrically connected to the auxiliary wiring terminal row.

2. The smart terminal for power collection control according to claim 1, characterized in that, the main control module is electrically connected to the light guide type liquid crystal display screen.

3. The smart terminal for power collection control according to claim 1, characterized in that, a backup power supply electrically connected to the main control module is provided inside the housing, and the backup power supply is a super capacitor and a replaceable clock battery.

4. The smart terminal for power collection control according to claim 1, characterized in that, the terminals on the auxiliary wiring terminal row are connected by reed pieces.

5. The smart terminal for power collection control according to claim 1, characterized in that, the function module includes but is not limited to a local communication module, a wireless remote communication module, a branch circuit monitoring module, an RS-485 module, a DC analog quantity module, a load control module, and a USB to network module.

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