Novel load management branch device

Abstract

According to the technical scheme, the novel load management branch device comprises a measurement unit, a data processing and storage unit, a communication unit and the like, and has the functions of measurement, information storage and processing, real-time monitoring, information interaction, remote signaling, remote control and the like. Wherein the uplink mainly communicates with the load management terminal / intelligent measurement terminal through 485, and the downlink realizes monitoring and control of a low-voltage side circuit breaker through remote control and remote control signals, and has a metering function to realize load monitoring of a special transformer user branch side. The device is mainly applied to an orderly power utilization scene, is matched with a novel load management system main station to issue a command through a terminal so as to monitor and cut off a first-stage branch load of a special transformer user, is additionally arranged in a branch loop of a power utilization station area, and is equipment for acquiring electric parameter data and controlling opening of a branch circuit breaker.

Description

Technical Field

[0001] The present invention relates to the technical field of power load management systems, and particularly to a novel load management branch device. Background Art

[0002] With the development of new power grids, it is particularly important to achieve efficient management and distribution of power loads to ensure the stable operation of power systems. State Grid and China Southern Power Grid deploy demand-side management terminals in the branch circuits of radio stations for electricity use and transform them to remotely monitor and intelligently control the electrical equipment of users with relatively high power consumption, enabling users to actively participate in energy management and promptly understand and master their own electricity consumption situations. According to the orderly power consumption instructions, during peak electricity consumption periods, some temporarily interruptible loads can be shut down according to the electricity consumption distribution to minimize or have minimal impact on production order, effectively improving energy use efficiency and energy conservation, thereby ensuring the reliability and stability of power supply. In addition, the load management branch device can also help power companies or related institutions optimize the operation efficiency of power systems, reduce power production and distribution costs, and enhance the competitiveness of the power market.

[0003] Therefore, researching load management branch devices has the following advantages: 1. It provides a decision-making basis for shifting peak loads, formulating time-of-use electricity prices, and dividing electricity consumption periods. 2. It classifies and summarizes user data, actively conducts medium- and short-term load forecasting, and improves electricity use efficiency. 3. It realizes anti-stealing electricity monitoring and reduces power loss. 4. It provides guarantee for the power system to realize its significance, ensures the safe power use of the power grid and all walks of life, guarantees the safe and economic operation of the power grid, and constructs a harmonious power supply and use environment, having very broad development space and market prospects.

[0004] Therefore, based on the development status quo, it is necessary to design a load management branch device that can achieve high metering accuracy and long-term stable operation. Summary of the Invention

[0005] In view of the deficiencies and defects existing in the prior art, the present invention provides a novel load management branch device. The present invention is mainly applied to the orderly power consumption scenario, and cooperates with the master station of the new load management system to issue commands through the terminal to realize the monitoring and cutting of the first-level branch load of special transformer users. Installed in the branch circuit of the radio station for electricity use, it can achieve high metering accuracy and long-term stable operation, and is a device for collecting electrical parameter data and controlling the opening of the branch circuit breaker. It consists of a measurement unit, a data processing and storage unit, a communication unit, etc., and has functions such as measurement, information storage and processing, real-time monitoring, information interaction, remote signaling, and remote control.

[0006] The object of the present invention can be achieved through the following technical solutions:

[0007] A new type of load management branch device, which includes a display and control board, a power supply board, a power acquisition board, and an expansion board. The boards are connected through pins and sockets. Among them:

[0008] Further, the display and control board mainly includes an MCU main control circuit, a Nor Flash storage circuit, a watchdog circuit, buttons, indicator lights, a liquid crystal display, a DCDC power supply, and socket interfaces for the power acquisition board, the power supply board, and the expansion board;

[0009] Further, the power supply board mainly includes an AC-DC flyback power supply circuit, a telemetry signal circuit, a remote control circuit, a relay open-circuit monitoring circuit, a 485 circuit, and a pin interface connected to the display and control board;

[0010] Further, on the power acquisition board, there are mainly a DC-DC power supply circuit, a three-phase voltage sampling circuit, a three-phase current sampling circuit, a TC8302 power acquisition circuit, and a pin interface connected to the display and control board;

[0011] Further, the expansion board mainly includes a buzzer circuit, a real-time clock circuit, a pulse output circuit, a super capacitor charge and discharge management circuit, and a pin interface for plugging in with the display and control board.

[0012] A new type of load management branch device, characterized in that the power acquisition board realizes the metering function mainly by selecting the TC8302+TC3006 scheme, realizes voltage and current sampling, power and phase angle calculation, and electric energy accumulation function, realizes the storage of metering data and events, communicates with the main control through UART, and transmits data; provides metering pulses for the table calibration of the bench body, including active pulses and reactive pulses; at the same time, transmits the bottom code sampling data to the main control in real time through SPI for edge computing applications such as topology analysis, power quality analysis, and loop inspection.

[0013] A new type of load management branch device, characterized in that it supports two 485 interfaces. One 485 interface is used for up-link communication with the load management terminal, and the other 485 is used for local maintenance or function expansion. The 485 circuit adopts a three-wire polar design and is isolated by an optocoupler at the same time.

[0014] A new type of load management branch device, characterized in that it supports two-way telemetry switch input. One of the telemetry signals mainly communicates with the terminal, reports whether there is a break, and accepts the terminal trip command to control the remote control function to make the circuit breaker in the lower circuit trip. The other telemetry signal mainly monitors the situation of the circuit breaker.

[0015] Adopting the above technical solution, compared with the prior art, it has the following beneficial effects: high metering accuracy and long-term stable operation can be achieved, and through communication with the terminal RS485, the status monitoring and tripping of the low-voltage side circuit breaker can be realized, providing guarantee for stable and orderly power consumption. Brief Description of the Drawings

[0016] Figure 1 is the basic physical architecture of the present invention.

[0017] Figure 2 is the physical architecture of the power supply board in the present invention.

[0018] Figure 3 is the physical architecture of the AC sampling board in the present invention.

[0019] Figure 4 is the physical architecture of the expansion board in the present invention.

[0020] Figure 5 is the physical architecture of the display and control board in the present invention. Detailed Embodiments

[0021] In order to make the objectives, technical solutions and advantages of the present invention clearer, the present invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and do not limit the present invention.

[0022] As Figure 1 shown, a new type of load management branch device includes four single boards, namely a display and control board, a power interface board, an AC sampling board, and an expansion board, which are mainly composed of a measurement unit, a data processing and storage unit, and a communication unit, and have functions such as measurement, information storage and processing, real-time monitoring, information interaction, remote signaling, and remote control. The boards are connected through pins and sockets. Among them, the uplink mainly communicates with the load management terminal / intelligent metering terminal through 485, and the downlink monitors and controls the low-voltage side circuit breaker through remote control and remote control signals, and at the same time has a metering function to realize the load monitoring on the branch side of the dedicated transformer user.

[0023] As Figure 2As shown in the figure, the power supply board of a new type of load management branch device mainly includes an AC-DC flyback power supply circuit, a remote signaling circuit, a remote control circuit, a relay disconnection monitoring circuit, a 485 circuit, and a pin interface connected to the display and control board. The functions achieved are as follows: 1. 485 communication conversion function: It supports two 485 interfaces. One 485 interface is used for communication with the load management terminal as the upstream, and the other 485 interface is for local maintenance or function expansion. The 485 circuit adopts a three-wire polar design and is isolated by an optocoupler. 2. Remote signaling detection input function: It supports two digital input signals, using 12V active terminals. The maximum power consumption when closed is less than 0.2W, and it is isolated by an optocoupler. The main control side uses the IO port to poll, and an anti-shake strategy is required. 3. Remote control output and relay disconnection detection function: It supports one control output, in the form of normally open contacts, and supports the disconnection detection function. The relay control uses the PWM method to control, improving the anti-interference ability and preventing misoperation of the control. 4. Display and control board interface: It supplies power to the display and control board through the interface. At the same time, the control signal and communication signal of the display and control board are introduced to the interface board through pins to achieve the functions of each interface. 5. Power supply circuit: It includes an AC-DC power supply circuit, which supplies power to the subsequent circuits. (Introduce the implementation mode or embodiment of the invention comprehensively, specifically, and in detail. This part should include all the content of the technical solution part in the above "Summary of the Invention" and expand the description, explain each content of the technical solution part, and it is best to have a detailed description of the specific working principle of the product or the implementation process of the method.)

[0024] As Figure 3 shown in the figure, the AC sampling board of a new type of load management branch device mainly includes a DC-DC power supply circuit, a three-phase voltage sampling circuit, a three-phase current sampling circuit, a TC8302 AC sampling circuit, and a pin interface connected to the display and control board. The functions achieved are as follows: 1. AC sampling and metering function: The metering selects the TC8302+TC3006 solution to achieve voltage and current sampling, power and phase angle calculation, and electric energy accumulation functions. It realizes the storage of metering data and events, communicates with the main control through UART, and transmits data; it provides metering pulses for the table calibration of the platform body, including active pulses and reactive pulses; at the same time, it transmits the bottom code sampling data to the main control in real time through SPI for edge computing applications such as topology analysis, power quality analysis, and loop inspection. 2. Display and control board interface: The control signal and communication signal of the display and control board are introduced to the interface board through pins to achieve the functions of each interface. 3. Power supply circuit: It includes a DCDC power supply circuit, which supplies power to the subsequent circuits.

[0025] As Figure 4As shown in the figure, the expansion board of a new type of load management branch device mainly includes a buzzer circuit, a real-time clock circuit, a pulse output circuit, a supercapacitor charge and discharge management circuit, and a pin interface for plugging into the display and control board. The functions implemented are as follows: 1. Real-time clock function: The clock chip JXR151 is selected, communicates with the main control through IIC, and is powered by a clock battery at the same time to avoid clock loss after power failure, and provides a second pulse to the main control chip for accurate clock alignment. 2. Human-computer interaction function: A passive buzzer is selected, mainly used for key prompts, alarms, etc. 3. Supercapacitor charge and discharge management: The whole machine uses a supercapacitor as a backup power supply. The supercapacitor is charged using a DC-DC buck and current-limiting scheme, and the discharge uses a DC-DC boost output scheme. The charging and discharging of the supercapacitor need to be controlled by the main control. Combining temperature sampling to implement a temperature control strategy, after the temperature is higher than the upper limit value, the supercapacitor charging is turned off to ensure the life of the supercapacitor. 4. Display and control board interface: The control signal and communication signal of the display and control board are introduced to the interface board through pins to realize the functions of each interface. 5. Power supply circuit: The power supply is obtained from the display and control board interface, and this single board has no additional power supply circuit.

[0026] As Figure 5As shown in the figure, the display and control board of a new type of load management branch device mainly includes an MCU main control circuit, a NorFlash storage circuit, a watchdog circuit, buttons, indicator lights, a liquid crystal display, a DC-DC power supply, and socket interfaces for the AC sampling board, power supply board, and expansion board. 1. MCU main control circuit: A 32-bit MCU is adopted, which has rich peripheral resources and is mainly used for main control functions, such as data processing and storage, communication functions, control functions, and monitoring functions. 2. Watchdog monitoring function: The watchdog monitoring function is realized. The main control is responsible for feeding the dog. Once the main control chip crashes and the dog feeding stops, a reset signal will be output to the main control after 1.6s, improving the system reliability. In addition, it also has a voltage detection function. On the one hand, it detects the 3.3V power supply voltage of the main control. Once the voltage is lower than 2.93V, it will quickly reset the main control to prevent low-voltage operation or malfunction. On the other hand, it detects the main power supply V14 for AC power failure detection. Once the main power supply V14 loses power, an interrupt signal will be output to the main control, and the main control can recognize the power outage information. 3. Nor Flash storage function: An 8MB-capacity non-volatile memory is selected, which is mainly used for data storage, and the SPI interface is selected for the interface with the main control. 4. Human-computer interaction function: The human-computer interaction of this device mainly includes a liquid crystal display, indicator lights, and buttons. The liquid crystal screen is mainly used for data display, parameter setting and viewing, etc.; the indicator lights are divided into four categories, including running indicator lights, tripping indicator lights, alarm indicator lights, and telemetry signal indicator lights. The indicator lights adopt high-brightness models for status indication; four buttons are supported, and the buttons can be customized according to customer needs or actual applications, and cooperate with the liquid crystal screen to achieve local operations. 5. Interfaces for the AC sampling board, power supply interface board, and expansion board: The display and control board communicates with the AC sampling board, power supply interface board, and expansion board through interfaces and provides control signals. The power supply interface board provides power supply for the display and control board, and the display and control board transfers power supply to the AC sampling board and expansion board. 6. Power supply circuit: It includes a DC-DC power supply circuit to meet the load requirements of each level of the circuit.

[0027] The above embodiments are illustrative of the specific embodiments of the present invention, rather than limitations thereof. Those skilled in the relevant technical fields can still make various transformations and changes without departing from the spirit and scope of the present invention to obtain corresponding equivalent technical solutions. Therefore, all equivalent technical solutions should be included in the patent protection scope of the present invention.

Claims

1. A novel load management branch device, characterized in that, It includes a display and control board, a power supply board, a power acquisition board and an expansion board, and the boards are connected through pins and sockets. Among them, the display and control board includes an MCU main control circuit, a Nor Flash storage circuit, a watchdog circuit, buttons, indicator lights, a liquid crystal display, a DCDC power supply, and socket interfaces for the power acquisition board, the power supply board and the expansion board; the power supply board includes an AC-DC flyback power supply circuit, a telecontrol signal circuit, a remote control circuit, a relay open-circuit monitoring circuit, a 485 circuit, and a pin interface connected to the display and control board; the power acquisition board includes a DC-DC power supply circuit, a three-phase voltage sampling circuit, a three-phase current sampling circuit, a power acquisition circuit, and a pin interface connected to the display and control board; the expansion board includes a buzzer circuit, a real-time clock circuit, a pulse output circuit, a supercapacitor charge and discharge management circuit, and a pin interface inserted into the display and control board.

2. A novel load management branch device according to claim 1, characterized in that, The power acquisition board can realize voltage and current sampling, power and phase angle calculation, and electric energy accumulation functions, realize the storage of measurement data and events, communicate with the main control through UART, and transfer data. It can provide measurement pulses for the calibration meter of the bench body, including active pulses and reactive pulses, and at the same time transfer the bottom code sampling data to the main control in real time through SPI for topology analysis, power quality analysis, and loop inspection edge computing applications.

3. A novel load management branch device according to claim 1, characterized in that It supports two 485 interfaces. One 485 interface is used for communication with the load management terminal in the upstream, and the other 485 is used for local maintenance or function expansion. The 485 circuit adopts a three-wire polar design and is isolated by an optocoupler at the same time.

4. A novel load management branch device according to claim 1, characterized in that It supports two-way telecontrol signal input. One of the telecontrol signals communicates with the terminal, reports the open-circuit situation, and accepts the terminal trip command to control the remote control function to make the circuit breaker in the lower path trip. The other telecontrol signal mainly monitors the situation of the circuit breaker.

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