CN116540578A - STM32 singlechip-based fault disconnection protection outlet logic detection device and detection method thereof - Google Patents

Abstract

The invention discloses a fault disconnection protection outlet logic detection device based on an STM32 singlechip, which comprises the STM32 singlechip, a voltage analog quantity signal input module, a digital quantity signal output module, a keyboard input module, a liquid crystal display module and a power supply input module, wherein the voltage analog quantity signal input module is used for acquiring bus voltage amplitude and frequency signals under the fault simulation condition, the digital quantity signal input module is used for acquiring switching value signals of a fault disconnection protection trip outlet relay at the closing moment, the digital quantity signal output module is used for outputting high-low level signals, a display is used for parameter display and setting, and the keyboard input module is used for modifying internal logic parameters of the device and switching a display interface. The invention also provides a detection method of the detection device. The invention can detect and display the action delay of each outlet relay, reduce the power consumption and rapidly judge the fault type corresponding to the action of the outlet relay.

Description

A logic detection device based on STM32 single-chip microcomputer fault decommissioning protection exit and Its detection method

technical field

The invention relates to the technical field of power system safety, in particular to an STM32 single-chip microcomputer-based logic detection device and a detection method for an outlet of fault decommissioning protection.

Background technique

With the continuous expansion of the grid-connected scale of green energy such as wind power and photovoltaic power generation, higher requirements are put forward for the development of the power system. As a kind of equipment to ensure the stable operation of the power system, the fault separation device is becoming more and more important. When the system voltage and frequency decrease, the fault unloading device can cut off some feeder circuit breakers in an orderly manner, so as to stabilize the system voltage and ensure the power consumption of users.

Generally, the fault release device is equipped with 20 outlet circuits. At present, a multimeter is commonly used to measure the potential change of the outlet circuit. It needs to repeatedly simulate 20 protection faults to detect one by one. The work process is cumbersome, time-consuming and labor-intensive, and the safety risk is high. If a fault-disconnect protection logic verification device is used, all tripping outlets can be detected through one test, but the device cannot measure the action delay of each outlet relay, and the outlet monitoring circuit wiring is very error-prone, so the designed Many holding relays have high power consumption and cannot distinguish the action of the outlet relay caused by voltage or frequency failure.

Contents of the invention

In order to overcome the deficiency that the existing logic verification device for fault separation protection cannot detect the action delay of each outlet relay, the present invention provides a logic detection device for fault separation protection exit based on STM32 single-chip microcomputer and its detection method. It can not only detect and display the action delay of each exit relay, but also optimize the wiring mode of the exit monitoring circuit, significantly reduce power consumption, and quickly determine the type of fault corresponding to the action of the exit relay.

A kind of STM32 single-chip microcomputer-based failure decommissioning protection exit logic detection device provided by the present invention includes STM32 single-chip microcomputer, and a voltage analog signal input module connected thereto, a digital signal input module, a digital signal output module, a keyboard input module, A liquid crystal display module and a power input module, the voltage analog signal input module, the digital signal input module and the keyboard input module transmit signals to the STM32 single-chip microcomputer, and the STM32 single-chip microcomputer transmits signals to the liquid crystal display module and the digital signal output module; The voltage analog signal input module is used to collect the bus voltage amplitude and frequency signal in the case of fault simulation, and the digital signal input module is used to collect the switch signal at the moment when the relay of the trip outlet of the fault disassembly protection is closed. The quantity signal output module is used to output high and low level signals, including 20 energy-saving indicator lights, which indicate whether the trip outlet relay is closed by controlling the conduction of the circuit where it is located. The display is used to display the collected trip exit relay closing signal, closed Delay time and internal logic parameter setting, the keyboard input module is used to modify the internal logic parameters of the device and switch the display interface.

Further, the STM32 microcontroller adopts STM32H750VBT6.

Further, the voltage analog signal input module includes a voltage sensor.

Further, the voltage sensor adopts ZMPT01B voltage sensor.

Further, the digital signal input module adopts a 21-core aviation plug.

The present invention also provides a detection method based on the STM32 single-chip microcomputer fault decommissioning protection exit logic detection device, including:

The first step is to modify and set the internal voltage and frequency start-up value according to the protection setting value in the detected fault de-loading device through the keyboard input module;

In the second step, the bus voltage amplitude and frequency signal under fault simulation are collected through the voltage analog signal input module. When the collected voltage amplitude or frequency value is less than the internal logic parameters of the device, the detection device starts to start continuous timing;

In the third step, the digital signal input module monitors and collects the closing signals of the 20 tripping export relays for fault protection. When detecting the instantaneous closing signals of several relays, the detection device stops timing, and calculates and displays the action delay of these export relays respectively. hour;

In the fourth step, the detection device outputs high-level digital signals at the same time. The digital signal output module contains 20 energy-saving indicator lights. The indicator lights corresponding to the activated export relays will be lit and keep on. Both the set parameters and the actual measured parameters are displayed on the LCD screen.

Beneficial technical effect of the present invention is as follows:

1. The logic detection device for the protection outlet of the fault disassembly protection of the present invention can detect 20 relay outlets at the same time, and the measurement accuracy is high, which meets the protection detection technical regulations;

2. The previous method of testing relay time one by one is improved to one-time detection, the test time is reduced by 95%, and the safety risk is significantly reduced;

3. According to the protection setting value in the detected fault disassembly device, the internal voltage and frequency starting value of the detection device of the present invention can be modified and set, and the adaptability is wide;

4. It is easy to connect with ordinary LCD screen and 4*4 matrix keyboard, which is convenient for display and parameter setting of the delayed sampling process;

5. The 21-pin aviation plug is used to realize 20 digital signal inputs, which is well integrated and convenient for test wiring.

Description of drawings

Fig. 1 is a system block diagram of the detection device of the present invention.

Fig. 2 is the main flowchart of the single-chip microcomputer of the present invention.

Detailed ways

In order to facilitate the understanding of the present invention, the present invention will be described more fully and in detail below in conjunction with the accompanying drawings and preferred embodiments, but the protection scope of the present invention is not limited to the following specific embodiments.

As shown in Figure 1, a kind of STM32 single-chip microcomputer-based failure decommissioning protection exit logic detection device of this embodiment includes a STM32 single-chip microcomputer, and a voltage analog signal input module, a digital signal input module, and a digital signal output module connected to it. module, a keyboard input module, a liquid crystal display module and a power input module, the voltage analog signal input module, digital signal input module and keyboard input module transmit signals to the STM32 single-chip microcomputer, and the STM32 single-chip microcomputer transmits signals to the liquid crystal display module and digital Quantity signal output module; The voltage analog signal input module is used to collect the bus voltage amplitude and frequency signal under the fault simulation situation, and the digital signal input module is used to collect the switch at the moment of closing of the trip outlet relay of the fault disassembly protection The digital signal output module is used to output high and low level signals, including 20 energy-saving indicator lights, which indicate whether the trip outlet relay is closed by controlling the conduction of the circuit where it is located, and the display is used to display the collected trip The closing signal of the exit relay, the closing delay time and the setting of internal logic parameters, the keyboard input module is used to modify the internal logic parameters of the device and switch the display interface.

In this embodiment, the STM32 microcontroller uses STM32H750VBT6, the voltage analog signal input module uses a ZMPT01B voltage sensor, and the digital signal input module uses a 21-core aviation plug.

The STM32 single-chip microcomputer-based failure logic detection device for the exit of the protection is mainly used for detecting whether the exit relay of the protection for failure is closed and the closing action delay. When the voltage or frequency drops below the protection fixed value at a speed less than the slip lock value respectively, the fault trip protection outlet relay will be closed, as shown in Figure 2, a fault solution based on the STM32 microcontroller of the present invention The detection method of the exit logic detection device of column protection, including:

The first step is to modify and set the internal voltage and frequency start-up value according to the protection setting value in the detected fault de-loading device through the keyboard input module;

In the second step, the bus voltage amplitude and frequency signal under fault simulation are collected through the voltage analog signal input module. When the collected voltage amplitude or frequency value is less than the internal logic parameters of the device, the detection device starts to start continuous timing;

In the third step, the digital signal input module adopts a 21-core aviation plug, which can monitor and collect the closing signals of 20 tripping exit relays for fault protection. The action delay of these export relays;

In the fourth step, the detection device outputs high-level digital signals at the same time. The digital signal output module contains 20 energy-saving indicator lights. The indicator lights corresponding to the activated export relays will be lit and keep on. It needs to be reset through the reset button on the keyboard, and the action result can be judged intuitively. Both the set parameters and the actual measured parameters are displayed on the LCD screen.

Those skilled in the art should recognize that the above descriptions are only specific implementations of the present invention, and are not intended to limit the protection scope of the present invention. As long as within the spirit and principles of the present invention, any modification , Variations all do not go beyond the scope of protection of the present invention.

Claims (6)

1. A logic detection device based on STM32 single-chip fault de-listing protection exit, characterized in that: comprise STM32 single-chip, and a voltage analog signal input module connected thereto, a digital signal input module, a digital signal output module, a keyboard input Module, liquid crystal display module and power input module, the voltage analog signal input module, digital signal input module and keyboard input module transmit signals to the STM32 single-chip microcomputer, and the STM32 single-chip microcomputer transmits signals to the liquid crystal display module and digital signal output module The voltage analog signal input module is used to collect the bus voltage amplitude and frequency signal under the fault simulation situation, and the digital signal input module is used to collect the switching signal at the moment when the relay of the tripping outlet of the fault decoupling protection is closed, so The digital signal output module is used to output high and low level signals, including 20 energy-saving indicator lights, which indicate whether the tripping exit relay is closed by controlling the conduction of the circuit where it is located, and the display is used to display the collected closing signal of the tripping exit relay , Closing delay time and internal logic parameter setting, the keyboard input module is used to modify the internal logic parameters of the device and switch the display interface. 2. A kind of STM32 single-chip microcomputer-based failure decommissioning protection exit logic detection device as claimed in claim 1, characterized in that: said STM32 single-chip microcomputer adopts STM32H750VBT6. 3 . A logic detection device for fault decommissioning protection exit based on STM32 microcontroller according to claim 1 , wherein the voltage analog signal input module includes a voltage sensor. 4 . 4. A kind of STM32 single-chip microcomputer-based failure decommissioning protection exit logic detection device as claimed in claim 3, characterized in that: said voltage sensor adopts ZMPT01B voltage sensor. 5. A kind of STM32 single-chip microcomputer-based fault disassembly protection exit logic detection device as claimed in claim 1, characterized in that: said digital signal input module adopts a 21-core aviation plug. 6. the detection method of a kind of fault disassembly protection exit logic detection device based on STM32 single-chip microcomputer described in any one of claim 1-5, it is characterized in that, comprising: The first step is to modify and set the internal voltage and frequency start-up value according to the protection setting value in the detected fault de-loading device through the keyboard input module; In the second step, the bus voltage amplitude and frequency signal under fault simulation are collected through the voltage analog signal input module. When the collected voltage amplitude or frequency value is less than the internal logic parameters of the device, the detection device starts to start continuous timing; In the third step, the digital signal input module monitors and collects the closing signals of the 20 tripping export relays for fault protection. When detecting the instantaneous closing signals of several relays, the detection device stops timing, and calculates and displays the action delay of these export relays respectively. hour; In the fourth step, the detection device outputs high-level digital signals at the same time. The digital signal output module contains 20 energy-saving indicator lights. The indicator lights corresponding to the activated export relays will be lit and keep on. Both the set parameters and the actual measured parameters are displayed on the LCD screen.