Load control module

Abstract

The utility model provides a load control module, which belongs to the field of electric power and comprises a main control unit module, a data acquisition module, a storage module, a man-machine interaction module, a communication module, a control module and a power supply module. According to the module, data such as voltage, current and power are accurately collected, data processing and load control strategy implementation are carried out through the microprocessor, effective control over power loads can be achieved, and the rapid, efficient and intelligent power requirements are met. Man-machine interaction is carried out through liquid crystal display, key input and the like, a user can operate and monitor conveniently, and various wired and wireless communication modes are adopted. The storage module ensures safe storage of data, and the main and standby dual power supply design of the power supply module ensures stable operation of the system. By adopting the design, more accurate data acquisition, faster response speed, better man-machine interaction experience and higher system stability and reliability can be realized.

Description

Technical Field

[0001] The utility model belongs to the field of electric power, and more specifically relates to a load control module. Background Art

[0002] In the current power system, electricity demand and consumption experience peaks and valleys. These large fluctuations cause unstable power loads and can even lead to grid disconnections and power outages. Furthermore, excessive use of electricity wastes energy and harms the environment. Therefore, how to scientifically and rationally control loads and achieve intelligent power management is an urgent issue for the power system and related industries.

[0003] To achieve effective power management, load control systems have been widely researched and applied. Traditional load control systems are mostly based on specific hardware devices, such as switchgear and electromagnets, which rely on manual operation or simple automated control to disconnect or disconnect loads. However, these load control methods suffer from cumbersome operation, slow response, and low intelligence, failing to meet the fast, efficient, and intelligent demands of modern power generation.

[0004] In recent years, new power load control systems have begun to be put into practical use. These systems primarily consist of data acquisition modules, communication modules, master control modules, and execution modules. They enable real-time collection, processing, and control of power usage, thereby enabling intelligent management of power loads. However, these systems still face some challenges and room for improvement in practical operation, such as data accuracy, system stability, and human-computer interaction. Furthermore, market demand for more accurate, stable, user-friendly, and intelligent load control systems remains strong. Summary of the Invention

[0005] The present utility model is dedicated to designing and proposing a new type of load control module, which can efficiently and accurately collect electricity usage data, and based on this, accurately control the load through a preset control strategy to achieve a stable supply of electricity and effective utilization. At the same time, the module should also have a friendly human-computer interaction function, so that users can easily set and monitor in real time to enhance the user experience. In addition, in order to meet the usage requirements of different devices and environments, the load control module also needs to have good adaptability and compatibility. In summary, the design purpose of the present utility model is to solve these problems in the prior art and provide an efficient, accurate, user-friendly and adaptable power load control module.

[0006] In order to achieve the above-mentioned purpose, the present invention is implemented by adopting the following technical solutions: the load control module 6 includes: a main control unit module 1, a data acquisition module 2, a storage module 3, a human-computer interaction module 4, a communication module 5, a control module 6 and a power supply module 7;

[0007] The main control unit module 1 is electrically connected to the data acquisition module 2, the storage module 3, the human-computer interaction module 4, the communication module 5, the control module 6 and the power supply module 7; and is responsible for data acquisition, processing, display and control functions.

[0008] In one embodiment, the data acquisition module 2 is based on the electric energy chip ATT7022B, and collects the effective value of voltage and current, active power, reactive power, apparent power, and active and reactive energy of each phase or phase.

[0009] In one embodiment, the data acquisition module 2 further includes a current sampling circuit: current sampling is based on a current transformer SCT254AK; the rated input and output currents are 5A and 2.5mA respectively.

[0010] In one solution, the storage module 3 uses an FM24C512 memory chip. The interface between the FM24C512 chip and the external MCU is connected using an I2C bus. The storage capacity is 512kb and is pin-compatible with the industrial standard 24C512 chip.

[0011] In one embodiment, the human-computer interaction module 4 includes a keyboard input circuit and a liquid crystal display circuit; the keyboard input circuit has four key inputs; and the liquid crystal display circuit uses a 12864 liquid crystal module.

[0012] In one embodiment, the communication module 5 includes wired communication and wireless communication.

[0013] Beneficial effects of the utility model:

[0014] By utilizing power chips, current transformers, and other components, electricity usage data can be efficiently and accurately collected, encompassing multiple dimensions such as voltage, current, and power. This effectively improves data collection accuracy and reduces errors. Secondly, the use of a microprocessor for control allows for rapid response to data changes, while load control is performed via relays, significantly enhancing control precision and responsiveness. Thirdly, the LCD display and key input design within the human-computer interaction module 4 allow for more convenient and intuitive user operation, improving the user experience. Furthermore, the module supports multiple wired and wireless communication methods, enhancing the flexibility and real-time nature of communication. The storage module 3 ensures data security and stability. Finally, the power module 7 incorporates dual primary and backup power supplies, ensuring stable system operation and enabling timely switching in the event of a primary power failure, significantly improving system reliability. Therefore, the load control module 6 not only improves the operating efficiency of the power system but also optimizes the user experience while enhancing system stability and reliability. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 This is a system block diagram of the utility model;

[0016] Figure 2 This is the circuit schematic diagram of the main control module of this utility model;

[0017] Figure 3 This is the current sampling principle diagram of the utility model;

[0018] Figure 4 This is the voltage sampling principle diagram of the utility model;

[0019] Figure 5 This is a schematic diagram of the storage circuit of the utility model;

[0020] Figure 6 This is the circuit diagram of the human-computer interaction module of this utility model

[0021] Figure 7 This is the schematic diagram of the wired communication circuit;

[0022] Figure 8 This is a schematic diagram of a wireless communication circuit;

[0023] Figure 9 This is a circuit diagram of the control module of the present invention;

[0024] Figure 10 This is the schematic diagram of the power module.

[0025] In the figure, 1-main control unit module, 2-data acquisition module, 3-storage module, 4-human-computer interaction module, 5-communication module, 6-control module, and 7-power supply module. DETAILED DESCRIPTION

[0026] The following describes embodiments of the present application in more detail with reference to the accompanying drawings. Although the accompanying drawings illustrate embodiments of the present application, it should be understood that the present application can be implemented in various forms and should not be limited by the embodiments described herein. Rather, these embodiments are provided to make the present application more thorough and complete, and to fully convey the scope of the present application to those skilled in the art.

[0027] Unless otherwise expressly specified or limited, terms such as "mounted," "connected," "connect," and "fixed" should be interpreted broadly. For example, they may refer to fixed or detachable connections, or integration; mechanical or electrical connections; direct or indirect connections through an intermediary; and internal communication between two components or interaction between two components. Those skilled in the art will understand the specific meanings of these terms in this application based on the specific circumstances.

[0028] like Figure 1 As shown, the load control module 6 includes: a main control unit module 1, a data acquisition module 2, a storage module 3, a human-computer interaction module 4, a communication module 5, a control module 6 and a power supply module 7; the main control unit module 1 is electrically connected to the data acquisition module 2, the storage module 3, the human-computer interaction module 4, the communication module 5, the control module 6 and the power supply module 7; and is responsible for data acquisition, processing, display and control functions.

[0029] Among them, the main control module is the core of the entire terminal system, responsible for data acquisition, processing, display and control functions; the data acquisition module 2 is responsible for completing the acquisition and processing of AC voltage and current; the storage module 3 is responsible for the storage of collected data, setting parameters and alarm information; the human-computer interaction module 4 is responsible for data display, parameter input and debugging functions; the communication module 5 is responsible for the communication between the terminal and the main station or the terminal and peripheral equipment; the control module 6 mainly controls the output of peripheral equipment to complete on-site control; the power supply module 7 is responsible for generating all voltage signals required by the terminal system to ensure reliable operation of the system.

[0030] The data acquisition module 2 is based on the electric energy chip ATT7022B, and collects the effective value of voltage and current, active power, reactive power, apparent power and active and reactive energy of each phase or phase.

[0031] The main control unit module 1 is the core of the terminal system. Currently, most terminal system designs use an MCU as the main controller. The MCU used in this article is the Atmel ATmega128 microcontroller. The ATmega128 is a high-performance, low-power 8-bit microprocessor with high stability and wide application. It uses an advanced ISC architecture, has fast execution speed, and has a rich set of external interfaces for ease of use.

[0032] like Figure 2 As shown in the figure, the core controller of the main control module is an ATmega128 microcontroller. The core circuit mainly includes a crystal oscillator circuit (composed of YKC8 and C9), an ISP online programming circuit (CON2), and a reset circuit (composed of R55, C62, D8, and S1). Because the terminal system needs to record time while it is operating, this design uses a real-time clock chip DS1302 to design the clock circuit. The DS1302 is a high-performance, low-power real-time clock chip with RAM. It can realize real-time timing functions and uses an H-line connection with the MCU for serial communication, making it ideal for use in monitoring systems.

[0033] The data acquisition module 2 also includes a current sampling circuit: current sampling is based on the SCT254AK current transformer; the rated input and output currents are 5A and 2.5mA respectively. This chip integrates six second-order ADC circuits, capable of collecting multiple power parameters in the power system (such as the effective values of voltage and current, active power, reactive power, apparent power, and active and reactive energy of each phase or phase), effectively achieving real-time measurement of common power parameters. The schematic diagram of the current sampling and voltage sampling circuit is shown below. Figure 3 and 4 shown.

[0034] Figure 3 This is a schematic diagram of the current sampling circuit. The current sampling circuit is based on the SCT254AK current transformer, a precision current transformer with rated input and output currents of 5A and 2.5mA, respectively. In actual use, a precision resistor is required on the output side to convert the current signal into a voltage signal. This signal is filtered and then input into the ATT7022B power chip.

[0035] Figure 4 This is the schematic diagram of the voltage sampling circuit. The voltage transformer uses the SPT204B, a milliampere-level precision current transformer with a rated input and output current of 2 mA and 2 mA, respectively. In practice, the voltage needs to be converted to current on the output side, so a resistor is added at the front end. A precision resistor is used after the transformer to convert the current signal into a voltage signal, which is then filtered and input into the ATT7022B.

[0036] It is necessary to store the set parameters and collected power data, and the FM24C512 memory chip is used. The interface between the FM24C512 chip and the external MCU is connected using the I2C bus. The storage capacity is 512Kb, which is pin-compatible with Wang Yeluanzhun's 24C512 chip, making it very easy to develop and apply in practice. Due to the fast communication speed of the I2C bus, up to 1MHz, the chip is not only simple to operate, has a fast storage speed, but also has low power consumption, and is widely used in practice. The FM24C512 circuit schematic is shown in the figure below. Figure 5 shown.

[0037] The human-computer interaction module 4 includes a keyboard input circuit and a liquid crystal display circuit; the keyboard input circuit has four key inputs; the liquid crystal display circuit uses a 12864 liquid crystal module.

[0038] like Figure 6 As shown in the figure, the left circuit is the keyboard input circuit with four key inputs. Due to the small number of keys, the simplest key circuit is used. When a key is pressed, a low level is generated on the corresponding circuit. The MCU uses this low level to determine the key press and process it. The right circuit is the LCD display circuit, which uses the currently widely used 12864 LCD module. It is simple to use, has stable performance, and is relatively affordable.

[0039] like Figure 7 and 8 As shown, the communication module 5 includes both wired and wireless communication. When communicating with peripheral devices such as an energy meter, a wired connection is generally used over short distances, while the connection between the terminal system and the master station system is generally a wireless connection. The communication module 5 in this application includes both wired and wireless communication.

[0040] Figure 7 In the system, wired communication modes are divided into RS232 and RS485, mainly for compatibility with the communication interface of external devices. These two connection modes can be converted internally through the P10 interface. Figure 8 In the embodiment, the wireless communication mode is GPRS communication mode, and the communication module 5 adopts USR-GPRS-7S2, which has simple external wiring, is convenient and practical, and has high reliability, and can fully meet the needs of the terminal system.

[0041] like Figure 9 As shown, the control module 6 needs to perform certain control on the load, and the control method generally adopts switch quantity control. In this application, a four-way control circuit is designed. Since the driving current of the relay is large, the current directly output by the MCU is difficult to drive directly. Therefore, a current amplification circuit is designed using ULN2003N. The function of the diode in the figure is to discharge the current in the coil when the relay is disconnected to prevent false triggering.

[0042] like Figure 10 As shown, the power module 7 provides voltage support for the entire terminal system. Figure 10 In the example, the input AC220V voltage is converted into DC5V voltage through the voltage module VAS5-5-N. Since analog voltage and digital voltage are required in the system, they are distinguished in the power module 7.

[0043] The embodiments of the present application have been described above. The above description is illustrative and not exhaustive, and is not limited to the disclosed embodiments. Many modifications and variations will be apparent to those skilled in the art without departing from the scope and spirit of the described embodiments. The terminology used herein is selected to best explain the principles of the embodiments, their practical applications, or improvements to the technology in the market, or to enable other persons skilled in the art to understand the embodiments disclosed herein.

Claims

1. A load control module, characterized in that: The load control module (6) comprises: a main control unit module (1), a data acquisition module (2), a storage module (3), a human-computer interaction module (4), a communication module (5), a control module (6) and a power supply module (7); The main control unit module (1) is electrically connected to the data acquisition module (2), the storage module (3), the human-computer interaction module (4), the communication module (5), the control module (6) and the power supply module (7); and is responsible for data acquisition, processing, display and control functions.

2. A load control module according to claim 1, characterized in that: The data acquisition module (2) is based on the electric energy chip ATT7022B, and collects the effective value of voltage and current, active power, reactive power, apparent power and active and reactive power of each phase or phase.

3. A load control module according to claim 1, characterized in that: The data acquisition module (2) further comprises a current sampling circuit: current sampling is based on a current transformer SCT254AK; the rated input and output currents are 5A and 2.5mA respectively.

4. A load control module according to claim 1, characterized in that: The storage module (3) adopts FM24C512 memory chip. The interface between the FM24C512 chip and the external MCU is connected by I2C bus. The storage capacity is 512kb and is compatible with the pins of the industrial standard 24C512 chip.

5. The load control module according to claim 1, characterized in that: The human-computer interaction module (4) comprises a keyboard input circuit and a liquid crystal display circuit; the keyboard input circuit has four key inputs; the liquid crystal display circuit adopts a 12864 liquid crystal module.

6. The load control module according to claim 1, characterized in that: The communication module (5) includes wired communication and wireless communication.

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