Method and system for realizing in-situ detection of pressing plate of power secondary equipment

Abstract

The invention discloses an electric power secondary equipment pressing plate in-situ detection implementation method and system, and the method comprises the steps: applying a detection voltage to a pressing plate through an independently controlled isolation power module, converting the state of the pressing plate into an electric signal through a diode one-way conduction loop, and converting the electric signal into an internal remote signaling signal through an optical coupler isolation circuit; the controller logically judges a remote signaling hopping state, monitors whether the pressing plates are in place or not in real time, and supports time division multiplexing to detect multiple pressing plates; according to the invention, electrical interference between detection equipment and an outlet loop is effectively avoided, the circuit structure is simplified, the maintenance cost is reduced, and meanwhile, the system has the characteristics of high environmental interference resistance and high detection precision; and through a time division multiplexing strategy and an abnormity alarm mechanism, the reliability and practicability of the system are further improved, and the method is suitable for intelligent operation and maintenance scenes of power equipment such as a transformer substation.

Description

Technical Field

[0001] This invention relates to a method and system for implementation, specifically to a method and system for detecting the presence of pressure plates in secondary power equipment. Background Technology

[0002] Currently, power systems have implemented remote signaling technology for monitoring and controlling various equipment, systems, and processes, particularly in secondary equipment remote signaling, which covers information such as switch positions, environmental conditions, and device status. However, this type of remote signaling primarily monitors the operating status of primary switches and other equipment, and its monitoring of output control plates remains insufficient. Routine maintenance still mainly relies on manual operation of equipment panels to open and close control plates to verify whether the equipment is functioning correctly. These operations are not only cumbersome but also prone to human error and poor contact of the control plates, increasing maintenance costs and risks.

[0003] To improve this situation, several methods for pressure plate detection have been proposed in the existing technology. For example, by setting analog-to-digital converters at both ends of the pressure plate to convert DC voltage signals into digital signals, the controller determines the pressure plate status. Although this method can achieve detection without manual intervention, the analog-to-digital converter is susceptible to environmental factors, which may lead to sampling errors and thus affect the accuracy of the detection. In addition, a detection system using infrared transmitters and receivers combined with analog-to-digital converters improves the degree of automation, but the equipment cost is high, and the lifespan and maintenance cost of the sensors in the detection equipment are also issues. While these methods solve the problem of manual operation to some extent, they introduce more complex hardware equipment, increasing the system cost and maintenance difficulty. Summary of the Invention

[0004] Purpose of the invention: The purpose of this invention is to provide a method for detecting the position of pressure plates in secondary power equipment, thereby automatically detecting the position status of pressure plates in secondary equipment, ensuring the normal operation of the equipment, reducing human error, and lowering costs and maintenance workload. On the other hand, it also provides a system for detecting the position of pressure plates in secondary power equipment.

[0005] Technical solution: The method for detecting the in-situ pressure plate of secondary power equipment according to the present invention includes the following steps: A detection voltage is applied to the pressure plate under test through an independently controlled isolated power supply module; The pressure plate state is converted into an electrical signal using a unidirectional conduction circuit; The electrical signal is converted into an internal remote signaling signal through an optocoupler isolation circuit; The controller determines whether the pressure plate is in position based on the transition state of the remote signaling signal; An alarm signal is generated when an abnormal condition of the pressure plate is detected.

[0006] Preferably, the isolated power supply module adopts an isolated power supply with enable control, and its isolation strength is greater than or equal to the equipment outlet withstand voltage value.

[0007] Preferably, the unidirectional conduction circuit includes at least two series-connected diodes to form a unidirectional conduction path.

[0008] Preferably, the controller adopts a time-division multiplexing control strategy to sequentially detect multiple pressure plates.

[0009] Preferably, an alarm mechanism is triggered when three consecutive inconsistencies in the remote signaling status are detected.

[0010] The present invention provides a system for detecting the presence of pressure plates in secondary power equipment, comprising: An independently controlled isolated power supply module is used to provide a detection voltage isolated from the equipment power supply. It has an independent enable control terminal and supports multi-channel time-sharing power supply. A unidirectional conduction circuit, containing at least one diode; Optical isolation detection circuit, including optical coupling components; The controller has a built-in logic judgment module and a status storage unit configured to record historical detection data. in: The positive terminal of the isolation power supply is connected to the first diode, which is connected to the input terminal of the pressure plate. The second diode is connected to the input terminal of the optocoupler, which is connected to the common ground. The output terminal of the optocoupler is connected to the input terminal of the controller.

[0011] Preferably, the output terminal of the optocoupler isolation circuit is provided with a pull-up resistor to ensure that it remains at a high level when there is no signal.

[0012] Preferably, it also includes a communication module for remotely transmitting abnormal alarm information to a host computer.

[0013] Beneficial effects: Compared with the prior art, the present invention has the following significant advantages: 1. By using an independent isolated power supply module and a unidirectional conduction circuit design, the operational complexity of equipment maintenance is reduced, while accurate detection is achieved; at the same time, the detection circuit adopts optocoupler isolation, which reduces dependence on environmental conditions and ensures the stability of detection; 2. Through the above power injection detection method, the signal acquisition and processing circuit of the pressure plate can be simplified, and the long-term reliability of the pressure plate in-situ detection is improved. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the power secondary equipment pressure plate in-situ detection system of the present invention. Detailed Implementation

[0015] The technical solution of the present invention will now be described in detail with reference to the accompanying drawings.

[0016] As attached Figure 1 As shown, this embodiment provides a method for detecting the presence of pressure plates in secondary power equipment, including the following steps: A detection voltage is applied to the pressure plate under test through an independently controlled isolated power supply module; The pressure plate state is converted into an electrical signal using a unidirectional conduction circuit; The electrical signal is converted into an internal remote signaling signal through an optocoupler isolation circuit; The controller determines whether the pressure plate is in position based on the transition state of the remote signaling signal; An alarm signal is generated when an abnormal condition of the pressure plate is detected.

[0017] Specifically, an independently controlled isolated power supply module is used to generate a detection power supply that is isolated from the power supply of the device's output circuit. This power supply is connected to one end of the pressure plate through a unidirectional conductive circuit. The other end of the pressure plate is connected to an optocoupler-isolated detection circuit for sampling through a unidirectional conductive circuit. The sampled values ​​are analyzed and logically judged by the device controller.

[0018] When the device controller needs to detect whether the pressure plate under test is in place, it enables the isolated power supply to output the detection power supply by controlling the power control pin of the corresponding output to be tested, and collects the internal remote signal of the port connected to the corresponding detection circuit. Based on the change of the remote signal, it determines whether the pressure plate is in place. If the pressure plate status is consistent with the preset status, it is normal; if it does not conform to the preset status, it is abnormal, and an alarm or information can be uploaded.

[0019] In practical applications, when the system controller enables the isolation power supply 1, the positive terminal of the power supply applies a detection voltage V1+ to pin 1 of the pressure plate via diode D1.

[0020] If the pressure plate is pressed down, forming a reliable connection, the detection voltage V+ from pin 2 of the pressure plate is sent to the detection optocoupler U1 via diode D2. After isolation level conversion, the acquisition port 1 (pull-up internally) will be set to logic low, and the controller uses this to determine that the pressure plate is currently pressed down.

[0021] If the pressure plate is pulled out, there will be no detection voltage at pin 2 of the pressure plate, no input to the detection optocoupler U1, and the acquisition port 1 will remain at logic high. The controller uses this to determine that the pressure plate has been pulled out.

[0022] If the pressure plate has poor contact, the controller enables the isolation power supply 1 multiple times in a time-sharing manner according to the actual application scenario requirements of the device. The controller compares the detection result of the acquisition port 1 with the previous result. If a change occurs, it can be recorded and sent to the remote server. The server combines the device maintenance records to determine whether manual maintenance is required.

[0023] Similarly, when multiple pressure plates need to be detected at the same time, the system controller can select to enable the power supply for multiple pressure plates detection in a time-sharing or simultaneous manner according to specific needs and application scenarios, and monitor the status of each pressure plate according to the corresponding acquisition terminal signal.

[0024] This embodiment also provides a system for detecting the presence of pressure plates in secondary power equipment, including: An independently controlled isolated power supply module is used to provide a detection voltage isolated from the equipment power supply. It has an independent enable control terminal and supports multi-channel time-sharing power supply. The isolated power supply module adopts an isolated module with enable control to generate power that is isolated from the equipment power supply and is connected to the pressure plate detection circuit. Its isolation strength is designed and selected according to the equipment outlet withstand voltage requirements.

[0025] The isolated power supply module can be a digital power supply, and the power output voltage level can be dynamically set.

[0026] A unidirectional conduction circuit includes at least one diode (D1, D2). The unidirectional conduction circuit uses multiple diodes to form a detection circuit that conducts in one direction through the pressure plate to prevent the detection power supply from affecting the output circuit of the equipment itself.

[0027] The optocoupler isolation detection circuit includes an optocoupler component; the output of the optocoupler isolation circuit is equipped with a pull-up resistor to ensure that it remains at a high level when there is no signal; the detection circuit isolates the detection voltage passing through the pressure plate and converts it into an internal remote signal to be sent to the device controller.

[0028] The controller has a built-in logic judgment module and a status storage unit configured to record historical detection data. In the controller logic judgment, the device controller obtains internal remote signaling samples and determines whether the pressure plate is open or closed based on the remote signaling jump.

[0029] in: The positive terminal of the isolation power supply is connected to the first diode (D1), which is connected to the input terminal of the pressure plate. The second diode (D2) is connected to the input terminal of the optocoupler, which is connected to the common ground. The output terminal of the optocoupler is connected to the input terminal of the controller.

[0030] The system also includes a communication module for remotely transmitting abnormal alarm information to the host computer.

[0031] Those skilled in the art will understand that embodiments of this application can be provided as methods, systems, or computer program products. Therefore, this application can take the form of a completely hardware embodiment, a completely software embodiment, or an embodiment combining software and hardware aspects. Furthermore, this application can take the form of a computer program product implemented on one or more computer-usable storage media (including but not limited to disk storage, CD-ROM, optical storage, etc.) containing computer-usable program code. The solutions in the embodiments of this application can be implemented in various computer languages, such as the object-oriented programming language Java and the interpreted scripting language JavaScript.

[0032] This application is described with reference to flowchart illustrations and / or block diagrams of methods, apparatus (systems), and computer program products according to embodiments of this application. It will be understood that each block of the flowchart illustrations and / or block diagrams, and combinations of blocks in the flowchart illustrations and / or block diagrams, can be implemented by computer program instructions. These computer program instructions can be provided to a processor of a general-purpose computer, special-purpose computer, embedded processor, or other programmable data processing apparatus to produce a machine, such that the instructions, which execute via the processor of the computer or other programmable data processing apparatus, generate instructions for implementing the flowchart... Figure 1 One or more processes and / or boxes Figure 1 A device that provides the functions specified in one or more boxes.

[0033] These computer program instructions may also be stored in a computer-readable storage medium that can direct a computer or other programmable data processing device to function in a particular manner, such that the instructions stored in the computer-readable storage medium produce an article of manufacture including instruction means, which are implemented in a process Figure 1 One or more processes and / or boxes Figure 1 The function specified in one or more boxes.

[0034] These computer program instructions may also be loaded onto a computer or other programmable data processing equipment to cause a series of operational steps to be performed on the computer or other programmable equipment to produce a computer-implemented process, thereby providing instructions that execute on the computer or other programmable equipment for implementing the process. Figure 1 One or more processes and / or boxes Figure 1 The steps of the function specified in one or more boxes.

[0035] Although preferred embodiments of this application have been described, those skilled in the art, upon learning the basic inventive concept, can make other changes and modifications to these embodiments. Therefore, the appended claims are intended to be interpreted as including the preferred embodiments as well as all changes and modifications falling within the scope of this application.

[0036] Obviously, those skilled in the art can make various modifications and variations to this application without departing from the spirit and scope of this application. Therefore, if such modifications and variations fall within the scope of the claims of this application and their equivalents, this application also intends to include such modifications and variations.

Claims

1. A method for detecting the presence of pressure plates in secondary power equipment, characterized in that, Includes the following steps: A detection voltage is applied to the pressure plate under test through an independently controlled isolated power supply module; The pressure plate state is converted into an electrical signal using a unidirectional conduction circuit; The electrical signal is converted into an internal remote signaling signal through an optocoupler isolation circuit; The controller determines whether the pressure plate is in position based on the transition state of the remote signaling signal; An alarm signal is generated when an abnormal condition of the pressure plate is detected.

2. The method according to claim 1, characterized in that, The isolated power supply module uses an isolated power supply with enable control, and its isolation strength is greater than or equal to the equipment outlet withstand voltage value.

3. The method according to claim 1, characterized in that, The unidirectional conduction circuit includes at least two diodes connected in series to form a unidirectional conduction path.

4. The method according to claim 1, characterized in that, The controller employs a time-division multiplexing control strategy to sequentially detect multiple pressure plates.

5. The method according to claim 1, characterized in that, An alarm mechanism is triggered when three consecutive inconsistencies in the remote signaling status are detected.

6. A system for detecting the presence of pressure plates in secondary power equipment, characterized in that, include: An independently controlled isolated power supply module is used to provide a detection voltage isolated from the equipment power supply. It has an independent enable control terminal and supports multi-channel time-sharing power supply. A unidirectional conduction circuit, comprising at least one diode; Optical isolation detection circuit, including optical coupling components; The controller has a built-in logic judgment module and a status storage unit configured to record historical detection data. in: The positive terminal of the isolation power supply is connected to the first diode, which is connected to the input terminal of the pressure plate. The second diode is connected to the input terminal of the optocoupler, which is connected to the common ground. The output terminal of the optocoupler is connected to the input terminal of the controller.

7. The system according to claim 6, characterized in that, The output of the optocoupler isolation circuit is equipped with a pull-up resistor to ensure that it remains at a high level when there is no signal.

8. The system according to claim 6, characterized in that, It also includes a communication module for remotely transmitting abnormal alarm information to the host computer.

9. A computer-readable storage medium, characterized in that, The computer-readable storage medium stores computer instructions for causing a computer to perform the method of any one of claims 1 to 5.

10. An electronic device comprising a memory, a processor, and a computer program stored in the memory and executable on the processor, characterized in that, When the processor executes the program, it implements the method as described in any one of claims 1 to 5.

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