CN217113074U - Automatic switching and control device for super capacitor module - Google Patents

Abstract

An automatic switching and control device for a super capacitor module comprises a power supply conversion module, a circuit board, an analog quantity sampling unit, a 485 communication module, a digital quantity input module, a digital quantity output module, a flag bit selection module and a CPU; the automatic switching and control device for the super capacitor module is provided, the configuration flexibility is increased by increasing judgment conditions, and related problems are solved. On one hand, the scheme can change the method of the correlation quantity comparison threshold value and the access through a register in the communication configuration device, and can adapt to different system configurations without changing the hardware configuration of the device; on the other hand, the ultra-capacity module can be controlled according to a specific switching command given by the system, and whether the system is equipped or not can be judged in a mode of detecting the terminal voltage of the motor, and the ultra-capacity module is allowed to be switched. The utility model has the characteristics of the configuration is nimble, and low cost guarantees system continuous operation etc.

Description

A supercapacitor module automatic switching and control device

technical field

The utility model belongs to the technical field of capacitor module switching control, in particular to an automatic switching and control device of a super capacitor module.

Background technique

In the petroleum industry, the energy generated during the reciprocating motion of the pumping unit is often consumed by energy-consuming resistors. With the development and application of supercapacitor technology, supercapacitors, as an energy storage component, are widely used in energy recovery of devices in wind power, photovoltaics, rail transit and energy industries. In the process of energy recovery, the supercapacity module is used as an energy storage element. According to the needs of the system to store and release energy, it will be frequently put into the system or disconnected from the system to ensure the balance of the electrical network it belongs to. According to the specific instructions given in the initial situation of the system, it is determined whether the super capacitor module is put into system operation, and the control device is determined according to the number of super capacitor modules required by the system to match the system operation requirements.

The supercapacitor module switching control scheme described above is a common scheme, which is simple and easy to implement. But it has its own problems:

1. Whether the supercapacitor module can be switched or not depends on a single condition. If a fault occurs, it will not be able to operate, causing the supercapacitor switching system to be paralyzed;

2. A set of devices can only correspond to one application scenario. When the system changes, it cannot be flexibly configured, which affects the continuity of work.

The above descriptions have problems such as single detection conditions, poor matching, and influence on normal work continuity (production efficiency).

Utility model content

The purpose of the utility model is to provide an automatic switching and control device for a supercapacitor module to solve the above problems.

In order to achieve the above object, the utility model adopts the following technical solutions:

An automatic switching and control device for a supercapacitor module, including a power conversion module, a circuit board, an analog sampling unit, a 485 communication module, a digital input module, a digital output module, a flag bit selection module and a CPU; a power conversion module , analog sampling unit, 485 communication module, digital input module, digital output module, flag bit selection module and CPU are all set on the circuit board, and the analog sampling unit, 485 communication module, digital input module, digital Both the output module and the flag selection module are connected to the CPU; the power conversion module is respectively connected to the CPU, the analog sampling unit, the 485 communication module, the digital input module, the digital output module and the flag selection module.

Further, the CPU is also connected with a status indication module, and the power conversion module is connected with the status indication module.

Further, the power conversion module is externally connected to 24V power input; the analog sampling unit is externally connected to motor terminal voltage, bus voltage, module voltage and module temperature.

Further, the 485 communication module is externally connected to the upper computer, the digital input module is externally connected to the external switch input, and the digital output module is externally connected to the external switch control output.

Further, the power conversion module includes a board power supply terminal, a first power conversion module, a second power conversion module and a third power conversion module, and the board power supply terminal, the first power conversion module, the second power conversion module and the third power supply The conversion modules are connected sequentially.

Further, the analog quantity sampling unit includes a voltage reference module, an AC voltage sampling terminal, an AC voltage sampling and conditioning module, a bus voltage sampling terminal, a bus voltage sampling and conditioning module, a module voltage sampling terminal, a module voltage sampling and conditioning module, The temperature sampling terminal and the temperature sampling and conditioning module; the AC voltage sampling terminal is connected to the AC voltage sampling and conditioning module, and the AC voltage sampling and conditioning module is connected to the CPU; the voltage reference module is connected between the first power conversion module and the AC voltage sampling and conditioning module ;The bus voltage sampling terminal is connected to the bus voltage sampling and conditioning module, and the bus voltage sampling and conditioning module is connected to the CPU; the module voltage sampling terminal is connected to the module voltage sampling and conditioning module, and the module voltage sampling and conditioning module is connected to the CPU; the temperature sampling terminal is connected to The temperature sampling and conditioning module is connected to the CPU.

Further, the flag bit selection module is a hardware flag bit generation module, which is used to input 1 or 0 level to the tag bit IO of the CPU by pulling up the resistor to 3.3V or pulling it down to GND.

Further, the 485 communication module includes a communication terminal and an isolated 485 communication module; the communication terminal is connected to the isolated 485 communication module, and the isolated 485 communication module is connected to the CPU.

Further, the digital input module includes a digital output terminal and an isolated digital output module, the digital output terminal is connected to the isolated digital output module, and the isolated digital output module is connected to the CPU.

Further, the digital output module includes a digital input interface and an isolated digital input module, the digital input interface is connected to the isolated digital input module, and the isolated digital input module is connected to the CPU.

Compared with the prior art, the utility model has the following technical effects:

The utility model patent fully considers the above situation, and proposes an automatic switching and control device for supercapacitor modules, which solves related problems by adding judgment conditions and increasing configuration flexibility. On the one hand, the program can change the threshold value and path of the relevant quantity comparison through the register in the communication configuration device, and can adapt to different system configurations without changing the hardware configuration of the device itself; on the other hand, in addition to In addition to controlling the supercapacitor module with specific switching commands, it is also possible to judge whether the system is equipped and allow the supercapacitor module to switch by detecting the motor terminal voltage. The utility model has the characteristics of flexible configuration, low cost, continuous operation of the system and the like.

The utility model can flexibly configure the setting values of the registers in the device from the upper computer according to the different application environments on the spot under the same hardware, so as to adapt to different scenarios. For example, set the number of connected modules, modulate the system overvoltage and undervoltage thresholds, and set the module temperature protection threshold, etc. This device has the characteristics of flexible configuration, low cost, and high operation and maintenance efficiency. By judging the voltage of the motor terminal, the entire system can be guaranteed to run continuously without stopping; the system is flexible in configuration, low cost, and high in operation and maintenance efficiency. features.

Description of drawings

Fig. 1 is a structural block diagram of the utility model.

Fig. 2 is a detailed connection diagram of the structure of the utility model.

Detailed ways

Below in conjunction with accompanying drawing, the utility model is further described:

Please refer to Figures 1 to 2. The innovation of this utility model is that it can automatically switch on and off through detection and communication settings according to the system adapted to the capacitor module, and implement monitoring system status and module operating status during operation. .

1. As shown in Figure 1, it is a general diagram of an automatic switching and control device for a supercapacitor module, including:

It uses the power conversion module 2 to convert the external 24V power supply through the isolated power supply module to supply CPU7, analog sampling unit 3, 485 communication module 4, digital input module 5, digital output module 6, flag bit selection module 8 and status The indicator module 9 supplies power. After the device is powered on, judge whether it needs to work through the switch state fed back by the digital input module 5. If it needs to work, judge whether the system is faulty according to the sampled analog quantity or state value. In the fault-free state, the CPU selects the module 8 according to the flag bit The input to determine whether to start the soft start by external reference or by detecting the motor terminal voltage to start the soft start. Real-time monitoring of bus voltage, module voltage, module temperature and switch status during soft start, and switch to normal operation mode after soft start. , showing the current status. During the working process, there will always be conditions for the module to be switched in and out. The whole device judges whether the module should be switched on or off based on the preset reference value, and automatically completes the switching work, and automatically switches out and gives an alarm indication when there is a fault. Its submodule functions include:

(1) Supercapacitor module automatic switching and control body device printed circuit board: as a functional carrier, gather all devices according to the design plan.

(2) Power conversion module: complete the conversion of 24V to positive and negative 15V sampling conditioning module power supply, then convert positive 15V to 5V to power the communication module, and then convert 5V to 3.3V to power the CPU and its peripheral circuits.

(3) Analog quantity detection and conditioning module: complete the three-phase voltage sampling and conditioning as the basis for judging whether the supercapacitor can be switched, complete the sampling and conditioning of the bus capacitor as the basis for the normal operation of the charging system, and complete the module voltage sampling and conditioning as The basis of the soft start process and the basis of module state judgment, and the completion of module temperature sampling and conditioning is used as the basis for module state judgment.

(4) 485 communication module: transmit the system data collected by the CPU to the upper computer or the background through the MODBUS RTU protocol, and provide an interface for the background or the upper computer to set variables for this device.

(5) Digital input conversion module: The state of the switching value in the system is input through this module through optocoupler isolation, as the basis for judging the state of the CPU model.

(6) Digital output module: According to the instructions of the CPU, it controls the type of switching device of the system through optocoupler isolation and relay output.

(7) CPU: As the control center of the device, it compares the input analog signal with the preset reference value, and comprehensively judges the system status by combining the input signal of the digital input module, and uploads the status to the The upper computer controls the digital output module according to the preset modulation to control the switching devices and power devices in the whole system.

(8) Flag bit selection module: input high and low levels for the CPU to correspond to different start-up judgment conditions by means of pull-up and pull-down resistors. 0 level represents the detection digital input flag, 1 level represents the three-phase voltage value flag on the detector side. This flag bit can also be issued by the host computer through the 485 communication module. When enabled by the host computer, the hardware selection method is invalid.

(9) Status indication module: LEDs are used to indicate the operating status of the system. Different statuses correspond to different lights and flashing modes. This status can be displayed synchronously in the background through the 485 communication module.

The layout of the supercapacitor automatic switching and control device is shown in Figure 2, which is divided into 22 functional units, and the connection between each functional unit is shown in Figure 2. The detailed working principle is described as follows:

10 is a 24V power supply, a part of which directly supplies power to the digital input terminal 29, the primary side of the optocoupler of the digital input module 30, the digital output terminal 27, and the secondary side after optocoupler isolation in the digital output module; The positive and negative 15V module 11 supplies power for the sampling, detection and conditioning modules 16, 18, 20, 22 and the 5V-to-5V power supply module 12 required by the subsequent stage. At the same time, the positive 15V is converted into a reference power supply of 3.3V through the voltage reference module 14 to provide a reference power supply for the sampling conditioning module. The 15V to 5V power supply module 12 provides power for the 5V to 3.3V power conversion module 13, and the 3.3V output provides power for the CPU module 24, the digital input module 30, the digital output module 28 and the communication module 26. The three-phase AC connection terminal 15 and the AC voltage sampling and conditioning module 16 jointly form an AC voltage sampling and conditioning channel, which is connected to the CPU 24 for condition judgment. The bus voltage sampling connection terminal 17 and the bus voltage sampling and conditioning module 18 jointly constitute a bus voltage sampling and conditioning channel, which is connected to the CPU 24 for condition judgment and status monitoring. The module voltage sampling connection terminal 19 and the module voltage sampling and conditioning module 20 together constitute a module voltage sampling and conditioning channel, which is connected to the CPU 24 for condition judgment and status monitoring. The module temperature sampling connection terminal 21 and the module temperature sampling and conditioning module 22 together constitute a module temperature sampling and conditioning channel, which is connected to the CPU 24 for condition judgment and status monitoring. The hardware flag generating module 23 is connected to the CPU 24 to provide a determined flag. The communication connection terminal 25 and the communication module 26 jointly form a 485 communication channel, which is connected to the CPU 24 to complete the upload and distribution of the host computer data. The digital input terminal 29 and the digital input module 30 jointly constitute the detection of external system status information and are connected to the CPU 24 for status monitoring and judgment. The digital output connection terminal 27 and the digital output module 28 jointly constitute a digital output channel, and the CPU 24 issues commands to control various power devices and switching devices of the external system.

(10) Board power supply terminal: provide 24V input power and IO control power for the entire board;

(11) Power conversion module 1: 24V to positive and negative 15V isolated power supply, providing power for voltage sampling detection function and 5V power supply;

(12) Power conversion module 2: 15V to 5V module, which provides power for the temperature detection module and 3.3V power supply;

(13) Power conversion module 3: 5V to 3.3V module, which provides power for the controller and its peripheral circuits;

(14) Voltage reference module: 15V to 3.3V voltage reference, providing reference power for AC sampling;

(15) AC voltage sampling terminal: provide access for AC voltage access; provide A/B/C three-phase interface;

(16) AC voltage sampling and conditioning module: through high-impedance differential sampling, scaling, and reference lifting of the connected AC voltage to the range that can be sampled by the CPU;

(17) Bus voltage sampling terminal: provide BUSP and BUSN interfaces for the bus voltage access of the system;

(18) Bus voltage sampling and conditioning module: through high-impedance differential sampling, scaling, and reference lifting of the connected DC voltage to the range that the CPU can sample (can collect negative voltage signals);

(19) Module voltage sampling terminal: provide an interface for the total voltage of the supercapacitor module and the voltage sampling access of each module, and can support at least 6 module voltage sampling;

(20) Module voltage sampling and conditioning module: the connected module voltage is sampled and scaled to the range that the CPU can sample through high-impedance differential sampling;

(21) Temperature sampling terminal: provide an interface for the module temperature sensor and the ambient temperature sensor;

(22) Temperature sampling and conditioning module; perform bridge conversion on the signal of the temperature sensor and scale it to the range that the CPU can sample; (support various NTC or PT100 temperature sensors)

(23) Hardware flag bit generation module: input 1 or 0 level to the tag bit IO of the CPU by pulling up the resistor to 3.3V or pulling it down to GND;

(24) Control CPU: Confirm the start judgment condition by the value of the port selected by the flag bit, and control the digital output control port according to the start judgment condition to guide the closing and breaking of the automatic switching device. During the operation of the whole device, the voltage, temperature, and working conditions of the module are monitored in real time, and the status feedback of each switch of the system makes the system work in the automatic switching state. Communicate with the host computer in real time to display the system status.

(25) Communication terminal: provide 485 interface for background or upper computer communication;

(26) Isolate the 485 communication module: provide a channel between the 485 differential signal and the control CPU; realize the real-time monitoring of the system status by the upper computer or the background, configure the system parameters, and realize the background setting of the software flag.

(27) Digital output terminals: provide interfaces for power devices that need to be controlled by the system;

(28) Isolated digital output module: convert the level signal output by the CPU into a signal with sufficient load capacity required by the power device; it is divided into relay output type and transistor open collector output type;

(29) Digital input interface: provide an input interface for the state feedback of the switching device in the system;

(30) Isolated digital input module: convert the state signal input by the system into a level signal that the CPU can receive through optocoupler isolation;

(31) Status indication module: different flashing modes of the LEDs represent different fault types.

Claims (10)

1. An automatic switching and control device for a super capacitor module is characterized by comprising a power supply conversion module (2), a circuit board (1), an analog quantity sampling unit (3), a 485 communication module (4), a digital quantity input module (5), a digital quantity output module (6), a zone bit selection module (8) and a CPU (7); the circuit board comprises a power supply conversion module (2), an analog quantity sampling unit (3), a 485 communication module (4), a digital quantity input module (5), a digital quantity output module (6), a flag bit selection module (8) and a CPU (7), wherein the analog quantity sampling unit (3), the 485 communication module (4), the digital quantity input module (5), the digital quantity output module (6) and the flag bit selection module (8) are all arranged on the circuit board (1), and are all connected to the CPU (7); the power supply conversion module (2) is connected with and respectively connected with the CPU (7), the analog quantity sampling unit (3), the 485 communication module (4), the digital quantity input module (5), the digital quantity output module (6) and the zone bit selection module (8).

2. The automatic switching and control device of the super capacitor module set according to claim 1, wherein the CPU (7) is further connected with a status indication module (9), and the power conversion module (2) is connected with the status indication module (9).

3. The automatic switching and control device of the super capacitor module as claimed in claim 1, wherein the power conversion module (2) is externally connected with a 24V power input; the analog quantity sampling unit (3) is connected with the voltage of the external motor terminal, the bus voltage, the module voltage and the module temperature.

4. The automatic switching and control device of the super capacitor module as claimed in claim 1, wherein the 485 communication module (4) is externally connected with an upper computer, the digital input module (5) is externally connected with an external switching value input, and the digital output module (6) is externally connected with an external switching value control output.

5. The automatic switching and control device for the super capacitor module as claimed in claim 1, wherein the power conversion module (2) comprises a board power supply terminal, a first power conversion module, a second power conversion module and a third power conversion module, and the board power supply terminal, the first power conversion module, the second power conversion module and the third power conversion module are connected in sequence.

6. The automatic switching and control device of the super capacitor module set according to claim 5, wherein the analog sampling unit (3) comprises a voltage reference module, an alternating voltage sampling terminal, an alternating voltage sampling and conditioning module, a bus voltage sampling terminal, a bus voltage sampling and conditioning module, a module voltage sampling terminal, a module voltage sampling and conditioning module, a temperature sampling terminal and a temperature sampling and conditioning module; the alternating voltage sampling terminal is connected with the alternating voltage sampling and conditioning module, and the alternating voltage sampling and conditioning module is connected with the CPU; the voltage reference module is connected between the first power supply conversion module and the alternating voltage sampling and conditioning module; the bus voltage sampling terminal is connected with the bus voltage sampling and conditioning module, and the bus voltage sampling and conditioning module is connected with the CPU; the module voltage sampling terminal is connected with the module voltage sampling and conditioning module, and the module voltage sampling and conditioning module is connected with the CPU; the temperature sampling terminal is connected with the temperature sampling and conditioning module, and the temperature sampling and conditioning module is connected with the CPU.

7. The automatic switching and control device of the super capacitor module as claimed in claim 1, wherein the flag bit selection module (8) is a hardware flag bit generation module, and is configured to input 1 or 0 level to the tag bit IO of the CPU in a manner of pulling up the resistor to 3.3V or pulling down the resistor to GND.

8. The automatic switching and control device of the super capacitor module as claimed in claim 1, wherein the 485 communication module (4) comprises a communication terminal and an isolation 485 communication module; the communication terminal is connected with the isolation 485 communication module, and the isolation 485 communication module is connected with the CPU.

9. The automatic switching and control device of the super capacitor module as claimed in claim 1, wherein the digital input module (5) comprises a digital output terminal and an isolated digital output module, the digital output terminal is connected with the isolated digital output module, and the isolated digital output module is connected with the CPU.

10. The automatic switching and control device of the super capacitor module as claimed in claim 1, wherein the digital output module (6) comprises a digital input interface and an isolated digital input module, the digital input interface is connected with the isolated digital input module, and the isolated digital input module is connected with the CPU.

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