Modularized dual-power conversion device

Abstract

The utility model relates to a modularized dual-power conversion device, which comprises at least one semaphore acquisition and output module, the semaphore acquisition and output module is in communication connection with a main control end module through a 485 bus and a CAN bus and is configured to acquire a digital quantity state and send the digital quantity state to a main control module; meanwhile, a control command issued by the main control end module is received and analyzed, and a built-in relay is driven to output an execution action; the main control end module is connected with external equipment in a communication mode and is configured to receive a request of the external equipment, make a response, collect a switching value signal transmitted by the signal acquisition and output module, execute and output a control signal according to a current control flow, and send a switching command to the semaphore acquisition and output module; therefore, the opening and closing operation of the circuit breaker is controlled.

Description

Technical Field

[0001] This application relates to the field of power conversion, and in particular to a modular dual power conversion device. Background Technology

[0002] A power conversion device is a device that controls and converts electrical energy into its desired form. It plays a vital role in various fields, including electronic equipment, power systems, industrial automation, medical equipment, and aerospace.

[0003] In different dual-power conversion systems, the requirements for the acquired quantities and input signals vary greatly. Designing the entire power conversion device to meet all requirements would result in a significant waste of device resources and an increase in the overall cost of the power system. Utility Model Content

[0004] To address the aforementioned problems, embodiments of this application provide a modular dual-power conversion device, comprising:

[0005] At least one signal acquisition and output module is provided. The signal acquisition and output module is connected to the main control module via a 485 bus and a CAN bus. It is configured to acquire digital status and send it to the main control module. At the same time, it receives and parses the control commands issued by the main control module and drives its own relay output to perform actions.

[0006] A main control module is configured to receive and respond to requests from external devices via communication, collect switch signals transmitted by the signal acquisition and output module, execute and output control signals according to the current control flow, and send switching commands to the signal acquisition and output module to control the opening and closing operations of the circuit breaker.

[0007] In one possible implementation, the signal acquisition and output module has at least 64KB of RAM and at least 512KB of FLASH memory, and includes at least one CAN data bus and one 485 data bus.

[0008] In one possible implementation, the main control module has no less than 512KB of RAM, no less than 2MB of FLASH memory, and no less than 8GB of SD card, and includes an Ethernet interface with an RJ45 interface.

[0009] In one possible implementation, the signal acquisition and output module and the main control module are internally connected.

[0010] In one possible implementation, the semaphore acquisition and output module includes a communication unit configured to convert CAN bus and 485 bus signals into USART serial data.

[0011] In one possible implementation, the signal acquisition and output module includes a switch status / protection signal sampling circuit, which is used to photoelectrically isolate the input of the switch status / protection signal and then send it back to the CPU for acquisition.

[0012] In one possible implementation, the signal acquisition and output module includes a closing and opening signal output circuit for converting low-level control signals into high-voltage, high-current drive signals.

[0013] In one possible implementation, the main control module and the signal acquisition and output module are stacked to facilitate installation inside the cabinet.

[0014] In one possible implementation, the main control module internally stores a conversion program, which is configured to adjust the program files according to changes in requirements.

[0015] The technical solutions provided in this application embodiment may include the following beneficial effects:

[0016] The main control module receives and responds to requests from external devices via communication, collects switch signals transmitted by the signal acquisition and output module, executes and outputs control signals according to the current control flow, and sends switching commands to the signal acquisition and output module to control the opening and closing operations of the circuit breaker. The main control module performs logical processing on the sampling results of multiple received signals, issues control commands to the signal acquisition and output module according to the pre-programmed conversion flow, and outputs the corresponding status.

[0017] Depending on the load level, one main control module and several signal acquisition and output modules can be configured.

[0018] The device provided in this application can significantly reduce the difficulty and cycle of logic programming, simplify system design, and improve the utilization rate of general-purpose modules. Since the modules are connected by reliable physical connections, the wiring between switch cabinets is also simplified, truly achieving scalability and flexible configuration.

[0019] It should be understood that the above general description and the following detailed description are exemplary and explanatory only, and do not limit this application. Attached Figure Description

[0020] The accompanying drawings, which are incorporated in and form part of this specification, illustrate embodiments consistent with this application and, together with the description, serve to explain the principles of this application.

[0021] Figure 1 This is a schematic diagram of a conventional dual power supply conversion system with step-by-step switching;

[0022] Figure 2 This is a schematic diagram of a conventional dual-power conversion system with two incoming lines and one bus tie.

[0023] Figure 3 This is an illustrative embodiment of the scalable modular dual power conversion device provided in this application;

[0024] Figure 4 This is a schematic diagram of a signal acquisition and output module provided in an illustrative embodiment of this application;

[0025] Figure 5 This is a schematic diagram of the main control module provided in an illustrative embodiment of this application;

[0026] Figure 6 This is a schematic PCB diagram of the communication unit of the signal acquisition and output module provided in an illustrative embodiment of this application;

[0027] Figure 7 This application provides a schematic embodiment of a switch status / protection signal sampling circuit;

[0028] Figure 8 This is an illustrative embodiment of the circuit provided in this application for outputting closing and opening signals. Detailed Implementation

[0029] Exemplary embodiments will now be described in detail, examples of which are illustrated in the accompanying drawings. When the following description relates to the drawings, unless otherwise indicated, the same numbers in different drawings denote the same or similar elements. The embodiments described in the following exemplary embodiments do not represent all embodiments consistent with this application. Rather, they are merely examples of apparatuses and methods consistent with some aspects of this application as detailed in the appended claims.

[0030] In related technologies, such as Figure 1 and Figure 2 As shown, in Figure 1 and Figure 2 In the commonly used configuration mode shown, the acquisition points with step-by-step switching functionality require additional acquisition of parameters such as the switching position signal and protection status signal of load circuit breaker S1, and the switching position signal and protection status signal of load circuit breaker S2, compared to a conventional two-input-one-bus power conversion system. A total of 2*2n digital quantities need to be measured (where n is the number of load stages). Processing these additional signals within a single general-purpose dual-power switching device would result in significant resource waste.

[0031] In practical engineering applications, depending on the user's scenario, there are also special applications such as systems with four load levels, five load levels, and even more subdivided load levels. For these multi-load level applications, if a centralized dual power supply switch is still used to collect relevant signals, not only may the processor's processing speed fail to respond in time, but the number of wires on the dual power supply switch is also unsuitable for field applications. In addition, this will also lead to problems such as the dual power supply switch being too large and its installation methods being limited.

[0032] Furthermore, the application scenarios for such dual power switching devices are typically specialized and customized applications with high requirements for the entire system. The applications vary significantly between projects, and even devices of the same level may use different wiring methods due to different needs. Because of the varying number and configuration of incoming lines, it is impossible to design a universal dual power switching device suitable for all specialized and customized applications.

[0033] For the reasons mentioned above, this application provides a modular dual-power conversion device. We have designed different modules based on their functions: a signal acquisition and output module and a main control module. This allows for the combination of different modules according to different application requirements, minimizing the development of unavoidable customized parts, increasing the reusability of general-purpose modules, simplifying the application difficulty of customized projects, and shortening the development cycle of customized projects.

[0034] Specifically, an exemplary embodiment of this application provides a modular dual-power conversion device, including at least one signal acquisition and output module. The signal acquisition and output module is communicatively connected to the main control module via a 485 bus and a CAN bus. It is configured to acquire digital status signals and send them to the main control module, while simultaneously receiving and parsing control commands issued by the main control module and driving its built-in relay output to perform actions. The main control module is connected to an external device via communication. It is configured to receive requests from the external device and respond accordingly, collect switching signals transmitted by the signal acquisition and output module, execute and output control signals according to the current control flow, and send switching commands to the signal acquisition and output module to control the opening and closing operations of the circuit breaker.

[0035] In practical engineering applications, a main control module and several signal acquisition and output modules can be configured according to different load levels.

[0036] The greatest advantage of adopting this application is that it significantly reduces the difficulty and cycle of logic programming, simplifies system design, and improves the utilization rate of general-purpose modules. Since the modules are connected by reliable physical connections, the wiring between switch cabinets is also effectively simplified, truly achieving scalability and flexible configuration.

[0037] Furthermore, Figure 3This is an extended structural diagram of an exemplary embodiment of the scalable modular dual power supply conversion device. It includes several signal acquisition and output modules, the number of which depends on the required number of output I / Os, and a main control module. Generally, the main control module can be installed independently or within one of the circuit breaker cabinets. Due to the stacked design, the main control modules are stacked boards of the same size, thus greatly reducing their size and facilitating installation within the cabinet. The main control module and the signal acquisition and output modules are internally connected, eliminating the need for wiring.

[0038] Furthermore, Figure 4 The diagram shows a signal acquisition and output module. This module is used for telemetry and remote control functions, and each module has a separate address. For example, this module uses an STM32F103 or similar microprocessor; it has at least 64KB of RAM; 512KB of FLASH memory; and also has one CAN data bus and one RS-485 data bus for real-time communication with the main control module to transmit various current telemetry and remote control data.

[0039] Furthermore, Figure 5 The diagram shows the main control module. This module is the core of the conversion logic, with an internal embedded processor running the conversion program. The program files can be flexibly adjusted according to changes in customer needs to adapt to different project requirements. For example, this module uses an STM32F407 or similar microprocessor; has at least 512KB of RAM; 2MB of FLASH and an 8GB SD card; an RJ45 Ethernet interface; and two isolated RS485 buses for user use.

[0040] Furthermore, Figure 6 The diagram shows the communication transmission module within the signal acquisition and output module. The communication transmission module has a transmission distance of at least 200 meters. This module converts the CAN bus and 485 bus signals from the communication transmission module into USART serial data, which is easier for the microprocessor to process. Upon receiving this control signal, the CPU of the signal acquisition and output module immediately drives the relay to perform the relevant actions, thereby completing the control function.

[0041] Furthermore, Figure 7The diagram shows the sampling circuit for switch status / protection signals. Its main function is to optically isolate the input switch status / protection signals and then send them back to the CPU for acquisition. Pin 1 on the input side of the optocoupler is connected to the external signal input side through a current-limiting resistor R94 and a pull-up resistor R96. Pin 3 is grounded. C56 is used for filtering, and D48 is a TVS diode used to protect the circuit from damage caused by high-voltage transients. Pin 4 on the output side of the optocoupler is grounded. Pin 6 is connected to the low-voltage side operating power supply VCC 3.3V through a protection diode D47 and a pull-up resistor R95. C55 is also a filter capacitor. The filtered signal from pin 6 is directly sent to the CPU. In this circuit, when the input signal DI_IN_22 of the optocoupler is low (0), the LED on the primary side of the optocoupler does not work, so the transistor on the output side of the optocoupler is also not turned on. At this time, the GPIO_IN_22 signal at pin 6 is high (1). When the DI_IN_22 signal is high (1), the LED of the optocoupler starts to work, and the transistor on the secondary side of the optocoupler turns on. At this time, the GPIO_IN_22 signal at pin 6 is low (0).

[0042] Furthermore, Figure 8 This illustration shows a schematic embodiment of the circuit for outputting closing and opening signals, whose main function is to convert low-level control signals into high-voltage, high-current drive signals. Pin 1 of the input-side NPN transistor is connected to the input signal GPIO_DO_1 via a current-limiting resistor R100 and a pull-down resistor R103, with C57 acting as a filter; pin 2 is grounded; pin 3 is connected to 12V via a current-limiting resistor R97 and a protection diode D52, and K1 is a relay. In this circuit, when GPIO_DO_1 outputs a high-level signal, current flows through the current-limiting resistor R100 into the base of Q1, causing Q1 to conduct. After Q1 conducts, the 12V power supply flows through R97 and Q1 through the relay coil, energizing the relay coil and connecting the normally open contact NO_DO1 of K1 to the common terminal COM_DO1; when GPIO_DO_1 outputs a low-level signal, Q1 is cut off. After Q1 is cut off, the 12V power supply does not pass through the relay coil of R97 and Q1, the relay coil is de-energized, and the normally open contact NO_DO1 of K1 is disconnected from the common terminal COM_DO1.

[0043] The following provides a more detailed explanation of this device in its specific usage. All signal acquisition and output modules for the tiered switching process are connected to the CAN bus via a 485 bus, forming a unified system with the main control module. All execution modules are distinguished by their device addresses, prioritized according to load. All signal samples from the signal acquisition and output modules are transmitted to the main control module in an orderly manner via their addresses, ensuring that signals from each circuit breaker acquired by all signal acquisition and output modules are received by the main control module in an orderly fashion. The acquired signals are updated every 5 milliseconds, replacing the oldest cached 5 milliseconds data with the most recently acquired data. The result is stored in a buffer at a designated address, awaiting query from the main control module. The signal acquisition and output modules use the switch status and protection signal sampling provided by the device address as the switching conditions.

[0044] During dual-power switching, the main control module sends telemetry commands via the communication bus according to priority, polling the input and output status of all signal acquisition and output modules. Upon receiving a query command matching its address, the signal acquisition and output module replies with the corresponding input and output status. In this way, the main control module can continuously query the calculation results of all front-end sampling and execution modules at regular time intervals (e.g., every 5 milliseconds) to obtain the power quality status and switching information of all incoming lines. When all conditions are met, the main control module, according to a pre-programmed switching sequence, wirelessly sends remote loading and unloading signals from the circuit breaker to the front-end sampling and execution unit at a specific address. After parsing the remote command, the front-end sampling and execution unit drives the relevant relay outputs to execute the switching instruction.

[0045] In summary, compared to traditional centralized dual-power conversion devices, the device provided in this application can be flexibly expanded to include several signal acquisition and output modules according to different project requirements, delegating all sampling and control functions to these modules. The main control module only needs to run the detection process program, thereby greatly simplifying system design and improving the overall project customization responsiveness of the controller.

[0046] It should be noted that this application aims to protect the structure of the device and its connection relationships. The programs or algorithms involved in the modules can be implemented using existing technologies and are not the content to be protected in this application. The programs and processes involved are only used to more clearly illustrate the structural connection relationships, functions and effects of this device.

[0047] Other embodiments of this application will readily occur to those skilled in the art upon consideration of the specification and practice of the application disclosed herein. This application is intended to cover any variations, uses, or adaptations of this application that follow the general principles of this application and include common knowledge or customary techniques in the art not disclosed herein. The specification and examples are to be considered exemplary only, and the true scope and spirit of this application are indicated by the following claims.

[0048] It should be understood that this application is not limited to the precise structure described above and shown in the accompanying drawings, and various modifications and changes can be made without departing from its scope. The scope of this application is limited only by the appended claims.

Claims

1. A modular dual power conversion device, characterized by, The application relates to a circuit breaker control system, which comprises the following parts: at least one signal quantity acquisition output module, which is in communication connection with a master control end module through a 485 bus and a CAN bus, is configured to acquire digital quantity states and send the digital quantity states to the master control end module, receives and analyzes control commands issued by the master control end module and drives self-contained relays to execute actions; a master control end module, which is connected with external equipment in a communication mode, is configured to receive requests from the external equipment and make responses, collects on-off quantity signals transmitted by the signal quantity acquisition output module, executes and outputs control signals according to current control procedures, sends switching commands to the signal quantity acquisition output module to control the opening and closing operations of circuit breakers.

2. The modular dual power conversion device of claim 1, wherein, The signal quantity acquisition output module has running memory of not less than 64 KB and FLASH of not less than 512 KB, and comprises at least one CAN data bus and one 485 data bus.

3. The modular dual power conversion device of claim 1, wherein, The master control end module has running memory of not less than 512 KB, FLASH of not less than 2 MB and an SD card of not less than 8 GB, and comprises an RJ45 interface Ethernet interface.

4. The modular dual power conversion device of claim 1, wherein, The signal quantity acquisition output module and the master control end module are connected in an internal connection mode.

5. The modular dual power conversion device of claim 1, wherein, The signal quantity acquisition output module comprises a communication unit which is configured to convert CAN bus signals and 485 bus signals into USART serial data.

6. The modular dual power conversion device of claim 1, wherein, The signal quantity acquisition output module comprises a switch state / protection signal sampling circuit which is used for returning the input of switch state / protection signals to a CPU for acquisition after photoelectric isolation.

7. The modular dual power conversion device of claim 1, wherein, The signal quantity acquisition output module comprises a closing and opening signal output circuit which is used for converting low-level control signals into high-voltage and large-current driving signals.

8. The modular dual power conversion device of claim 1, wherein, The master control end module and the signal quantity acquisition output module adopt a laminated design to facilitate installation in a cabinet.

9. The modular dual power conversion device of claim 1, wherein, The master control end module internally stores a conversion program which is configured to adjust program files according to requirement changes.

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