Intelligent pressure plate double-potential acquisition unit

Abstract

The utility model relates to the technical field of voltage monitoring, in particular to an intelligent pressing plate double-potential acquisition unit which comprises a non-electric-quantity intelligent pressing plate voltage acquisition unit body. The non-electric-quantity intelligent pressing plate voltage acquisition unit comprises a non-electric-quantity intelligent pressing plate voltage acquisition unit main body, an induction groove 1 and an induction groove 2, the induction groove 1 and the induction groove 2 are arranged on the non-electric-quantity intelligent pressing plate voltage acquisition unit main body side by side, a coulomb charge meter 1 and a coulomb charge meter 2 are connected in series in a discharge loop of the induction groove 1 and the induction groove 2, and the non-electric-quantity intelligent pressing plate voltage acquisition unit further comprises a mirror image electrode plate 1, a mirror image electrode plate 2, a coulomb charge meter 3 and a coulomb charge meter 4, the two sensing grooves can sense the electric fields of the two measured pressing plate pile head wires at the same time, in an actual power system, the electric fields exist around the pressing plate pile head wires, information related to the voltage can be obtained by sensing the electric fields, and the two sensing grooves are adopted to sense and measure the voltage of the upper pile head and the lower pile head of the pressing plate at the same time; the electric field information can be obtained more comprehensively and accurately, and compared with a single induction groove, the precision and reliability of voltage acquisition can be effectively improved.

Description

Technical Field

[0001] This application relates to the field of voltage monitoring technology, and in particular to an intelligent pressure plate dual-potential acquisition unit. Background Technology

[0002] In power systems, circuit breakers are indispensable key components in relay protection and automatic devices, undertaking important functions such as controlling the on / off state of protection circuits and switching operating modes. Accurate monitoring of their operating status is crucial for ensuring the safe and stable operation of the power system.

[0003] However, existing non-contact pressure plate condition monitoring devices can only measure one wire at a time, resulting in low efficiency. This project aims to develop an intelligent pressure plate dual-potential acquisition unit to solve this problem. Utility Model Content

[0004] In view of at least one of the above technical problems, this application provides an intelligent pressure plate dual-potential acquisition unit, which adopts the following technical solution to solve the problems mentioned in the background art.

[0005] According to one aspect of this application, a smart pressure plate dual-potential acquisition unit is provided, comprising:

[0006] The main body of the non-electrical quantity intelligent pressure plate voltage acquisition unit;

[0007] Sensing slot 1 and sensing slot 2 are arranged side by side on the main body of the non-electrical quantity intelligent pressure plate voltage acquisition unit, and are used to simultaneously sense the electric field of the two measured conductors, thereby realizing the measurement of the voltage of the upper and lower terminals of the pressure plate.

[0008] Preferably, a coulomb meter 1 and a coulomb meter 2 are connected in series in the discharge circuit of the induction tank 1 and the induction tank 2.

[0009] Preferably, it also includes a mirror electrode plate 1 and a mirror electrode plate 2, wherein the mirror electrode plate 1 and the mirror electrode plate 2 maintain a fixed distance from the induction groove 1 and the induction groove 2, and form a mirror electric field through electric field coupling.

[0010] Preferably, a coulomb meter 3 and a coulomb meter 4 are connected in series in the discharge circuit of the mirror electrode plate 1 and the mirror electrode plate 2.

[0011] Preferably, both the sensing slot 1 and the sensing slot 2 are connected to a ground wire.

[0012] Preferably, the sensing slot 1 and sensing slot 2 are fixed to the PCB of the main body of the non-electrical intelligent pressure plate voltage acquisition unit by insulating material.

[0013] Preferably, the sensing slot 1 and sensing slot 2 are fixed to the outer shell of the non-electrical quantity intelligent pressure plate voltage acquisition unit body by insulating material.

[0014] Preferably, both the sensing slot 1 and the sensing slot 2 are connected to the charge pump 1 and the charge pump 2 via switches K1 and K2.

[0015] Preferably, the engagement / disengagement status of the pressure plate can be intelligently determined based on the two measured voltage values.

[0016] This application has the following technical effects:

[0017] This application utilizes two induction cells to simultaneously sense the electric field of two measured pressure plate pile head conductors, which can then be converted into a precise DC voltage relative to the ground. The measurement error can be within 5%. In actual power systems, an electric field exists around the pressure plate pile head conductors, and voltage-related information can be obtained by sensing this electric field. Using two induction cells simultaneously allows for more comprehensive and accurate acquisition of electric field information, effectively improving the accuracy and reliability of voltage acquisition compared to a single induction cell.

[0018] Meanwhile, this application can intelligently determine the engagement / disengagement status of the pressure plate based on the two measured voltage values. Since the circuits of the upper and lower terminals are connected when the pressure plate is engaged, the upper and lower terminals are definitely at the same potential. After deducting relevant measurement errors, system errors, and electrical noise interference, we further relax the range to specify that when there is a voltage difference between the upper and lower terminals, and the voltage difference is greater than 30V, the pressure plate is determined to be disengaged, and when the voltage difference is less than 30V, the pressure plate is determined to be engaged. This is a huge innovation compared to a single potential acquisition unit, which cannot accurately determine the engagement / disengagement of the pressure plate or cannot determine the engagement / disengagement of the pressure plate with 100% accuracy. Attached Figure Description

[0019] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0020] Figure 1 This is a three-dimensional structural diagram of this application;

[0021] Figure 2 This is a system schematic diagram of this application;

[0022] Figure 3 This is the circuit diagram of a single-slot non-electrical quantity intelligent pressure plate voltage acquisition unit;

[0023] Figure 4 This is a schematic diagram of the live pressure plate early warning system of this application. Detailed Implementation

[0024] Please see Figures 1 to 2It should be understood that the structures, proportions, sizes, etc., illustrated in the accompanying drawings are merely for illustrative purposes to aid those skilled in the art and to facilitate understanding. They are not intended to limit the scope of this application and therefore have no substantial technical significance. Any modifications to the structure, changes in proportions, or adjustments to size, without affecting the effectiveness or purpose of this application, should still fall within the scope of the technical content disclosed herein. Furthermore, the technical terms used in this specification are merely for clarity and not intended to limit the scope of this application. Changes or adjustments to their relative relationships, without substantially altering the technical content, should also be considered within the scope of this application's implementation.

[0025] To make the above-mentioned objectives, features, and advantages of this application more apparent and understandable, the specific embodiments of this application will be described in detail below with reference to the accompanying drawings. Many specific details are set forth in the following description to provide a full understanding of this application.

[0026] In this embodiment of the application, as Figures 1-2 As shown, a smart pressure plate dual-potential acquisition unit is provided, comprising:

[0027] Non-electrical quantity intelligent pressure plate voltage acquisition unit main body 01;

[0028] The sensing slots 1 and 2 are arranged side by side on the main body 01 of the non-electrical quantity intelligent pressure plate voltage acquisition unit, and are used to simultaneously sense the electric field of the conductors of the two pressure plate piles being tested.

[0029] It should be noted that the induction slot 1 and induction slot 2 can simultaneously sense the electric field of the conductors of two tested pressure plate piles. In actual power systems, an electric field exists around the conductors of the pressure plate piles, and voltage-related information can be obtained by sensing this electric field. Using induction slot 1 and induction slot 2 simultaneously allows for more comprehensive and accurate acquisition of electric field information, effectively improving the accuracy and reliability of voltage acquisition compared to using a single induction slot 1 or induction slot 2.

[0030] In one embodiment of the present invention, a coulomb meter 1 and a coulomb meter 2 are connected in series in the discharge circuit of the induction tank 1 and the induction tank 2.

[0031] It should be noted that the coulomb charge meter 2, based on Coulomb's law, can accurately measure the amount of charge passing through it. When induction tanks 1 and 2 discharge, the charge passes through the coulomb charge meter 2. The coulomb charge meter 2 accurately records the amount of discharged charge based on the relationship between the amount of charge and time. The coulomb charge meter 2 is connected in series in the discharge circuit of induction tanks 1 and 2 to accurately measure the amount of charge during the discharge process. The charge accumulated in induction tanks 1 and 2 after the induced electric field needs to be released through the discharge circuit. By measuring the amount of discharged charge, information related to the electric field strength can be indirectly obtained, and the voltage of the conductor at the head of the tested pressure plate can be calculated, providing a charge reference value for the subsequent generation of the mirror electric field.

[0032] In one embodiment of this utility model, it further includes a mirror electrode plate 1 and a mirror electrode plate 2, which maintain a fixed distance from the induction groove 1 and the induction groove 2, and form a mirror electric field through electric field coupling.

[0033] It should be noted that there is an electric field coupling effect between mirror electrode plates 1 and 2 and induction slots 1 and 2. When the conductor of the pile head under test generates an electric field, mirror electrode plates 1 and 2 will form a mirror electric field related to the original electric field near induction slots 1 and 2. This mirror electric field interacts with the original electric field, making the electric field induced in induction slots 1 and 2 more uniform and stable, and more in line with the theoretical electric field model.

[0034] In one embodiment of this utility model, a coulomb meter 3 and a coulomb meter 4 are connected in series in the discharge circuit of the mirror electrode plate 1 and the mirror electrode plate 2.

[0035] It should be noted that the coulomb meter 3 and coulomb meter 4 are connected in series in the discharge circuit of mirror electrode plate 1 and mirror electrode plate 2 to measure the amount of charge on mirror electrode plate 1 and mirror electrode plate 2 during the discharge process. Combined with the measurement of the discharge charge in induction tank 1 and induction tank 2, comprehensive data can be provided for accurately calculating the voltage of the conductor at the head of the tested pressure plate pile.

[0036] In one embodiment of this utility model, both the sensing slot 1 and the sensing slot 2 are connected to a ground wire.

[0037] It should be noted that, for safety and electrical performance stability reasons, excess charge may accumulate in induction tanks 1 and 2 during operation. If not released promptly, this could lead to electrical malfunctions or interfere with normal electric field induction. Furthermore, connecting a ground wire helps stabilize the potential of induction tanks 1 and 2, ensuring the accuracy of their electric field induction.

[0038] In one embodiment of this utility model, the sensing slot 1 and sensing slot 2 are fixed to the PCB of the main body 01 of the non-electrical quantity intelligent pressure plate voltage acquisition unit by insulating material.

[0039] It should be noted that the use of insulating material to fix the sensing slots 1 and 2 to the PCB of the main body 01 of the non-electrical quantity intelligent pressure plate voltage acquisition unit is to ensure the electrical insulation performance between the sensing slots 1 and 2 and the PCB. The sensing slots 1 and 2 need to independently and accurately sense the electric field. If there is any unnecessary electrical connection or short circuit with the PCB, it will seriously affect their electric field sensing function and the normal operation of the entire acquisition unit.

[0040] In one embodiment of this utility model, the sensing slot 1 and sensing slot 2 are fixed to the outer shell of the main body 01 of the non-electrical quantity intelligent pressure plate voltage acquisition unit by insulating material.

[0041] It should be noted that this structure is designed to further ensure the insulation of induction slot 1 and induction slot 2, and also to make induction slot 1 and induction slot 2 more securely installed in the acquisition unit from a mechanical perspective.

[0042] In one embodiment of this utility model, the sensing slot 1 and the sensing slot 2 are both connected to the charge pump 1 and the charge pump 2 via switches K1 and K2.

[0043] Charge pump 1 and charge pump 2 can directly inject charges (positive or negative) into induction tank 1 and induction tank 2, rapidly changing the polarization state of the induction tank.

[0044] This application also includes a method for voltage acquisition, to Figure 3 Taking the circuit shown as an example, the specific steps include:

[0045] Step 1: System Initialization and Charge Clearing

[0046] Close all grounding switches: close K1, K2 (grounding induction slot 1 and induction slot 2), K3, K4 (grounding mirror electrode plate 1 and mirror electrode plate 2), K5, K6 (grounding the circuits of charge pump 1 and charge pump 2).

[0047] Residual charge discharge: The residual charge of induction tank 1 and induction tank 2 is discharged to the ground wire through K1 and K2; the charge of mirror electrode plate 1 and mirror electrode plate 2 is discharged through K3 and K4.

[0048] Coulomb meter calibration: Coulomb charge meter 1, Coulomb charge meter 2, Coulomb charge meter 3 and Coulomb charge meter 4 monitor the charge to zero, the MCU records the initial state, and the calibration is completed.

[0049] Step Two: Placement of Wires and Electric Field Induction:

[0050] Wire installation: Place the wire to be tested 1 into the induction slot 1, and the wire 2 into the induction slot 2, ensuring that the wires have no physical contact with the induction slots;

[0051] Disconnect the grounding switches: disconnect K1 and K2 (grounding of the isolation induction slot), and K3 and K4 (grounding of the isolation mirror electrode plate);

[0052] Non-contact polarization charge generation: The voltage of the conductor is coupled to induction tank 1 and induction tank 2 through the electrostatic field, generating polarization charge.

[0053] Step 3: Generation of mirror electric field and charge matching

[0054] Polarity determination: Coulomb charge meter 2 (induction slot 1 circuit) measures the charge in induction slot 1, coulomb charge meter 4 (induction slot 2 circuit) measures the charge in induction slot 2, and the MCU determines the polarity (positive / negative).

[0055] Charge pump dynamic control:

[0056] Positive polarity voltage detection: When charge pump 2 (positive voltage output) is enabled, positive charge is injected into mirror electrode plate 2 through K5; when charge pump 1 (negative voltage output) is enabled, negative charge is injected into mirror electrode plate 1 through K6.

[0057] Negative polarity voltage detection: Only charge pump 1 (negative voltage output) is enabled, injecting negative charge into mirror electrode plate 1 through K3.

[0058] Charge matching verification: Coulomb charge meter 1 (mirror electrode plate 1 circuit) monitors the injected charge (positive charge) until it equals the charge in induction tank 1;

[0059] Coulomb charge meter 3 (mirror electrode plate 2 circuit) monitors the amount of injected charge (negative charge) until it equals the amount of charge in induction tank 2.

[0060] Step 4: Voltage Calculation and Data Output

[0061] Equivalent voltage conversion: After charge matching is completed, the output voltages of charge pump 1 and charge pump 2 are the conductor voltages.

[0062] Step 5: System Reset and Protection

[0063] Switch reset: Close K1-K6, all components are grounded, residual charge is released, and the system is reset to its initial state. This process design enables continuous real-time measurement of positive and negative polarity voltages, improving the comprehensiveness and timeliness of the measurement.

[0064] This voltage acquisition method enables continuous real-time measurement of both positive and negative polarity voltages. Precise control of charge state and orderly execution of measurement steps effectively improve the accuracy and reliability of the measurement. The continuous real-time measurement function allows the system to promptly capture voltage changes, providing real-time and accurate data support for power system operation monitoring and fault diagnosis. Simultaneously, the scientific rigor and precision of this method ensure the stability and consistency of the measurement results, reducing measurement errors and uncertainties, and enhancing the performance and practicality of the entire voltage acquisition system.

[0065] The voltage acquisition method described above assumes a positive electric field. If the voltage at the pressure plate terminal is negative, for example, -110V, then the charge recorded by the coulomb counter in the above steps will also be negative. To generate a negative electric field by mirroring the electrode plates, a negative charge pump is needed. Since a single charge pump can only either boost or deboost to generate a positive or negative voltage under current technology, it cannot do both simultaneously. Therefore, we use dual charge pumps: one dedicated to generating a positive voltage and the other to generating a negative voltage. When the external electric field or voltage is negative, between steps one and four, we disconnect switch K2, shutting off charge pump 2, and open switch K1, activating charge pump 1 to participate in the cyclic measurement. The specific timing of activating charge pump 1 and charge pump 2 is determined by the polarity of the charge measured by the coulomb counter. This achieves the goal of measuring both positive and negative polarities.

[0066] The voltage acquisition method employs a non-contact measurement approach, avoiding direct contact between operators and the voltage plate. This means the induction chamber does not directly contact the conductor at the test plate's terminal; instead, voltage measurement is achieved by sensing the surrounding electric field. This method prevents operators from directly contacting the voltage plate during measurement, reducing the safety risks associated with contact with live components. The non-contact method significantly improves operator safety and reduces the probability of electric shock and other accidents. Simultaneously, it reduces equipment damage and measurement errors caused by contact. Furthermore, non-contact measurement makes the operation more convenient, eliminating the need for complex insulation measures, improving measurement efficiency, and making it suitable for various complex power environments. It provides a safe, reliable, and efficient solution for voltage measurement in power systems.

[0067] like Figure 4 As shown, this application also discloses a pressure plate live warning system, applied to a dual-slot non-electrical quantity intelligent pressure plate voltage acquisition unit, which includes:

[0068] Multiple pressure plate status acquisition units are used to collect the engagement and disengagement status of the pressure plates. In addition, this application can also intelligently determine the engagement and disengagement status of the pressure plates. Two detection methods with different principles are used for double confirmation, which can mutually verify and reliably upload the engagement and disengagement status of the pressure plates to the background system for further processing and application of the data.

[0069] The intelligent pressure plate acquisition terminal is used to transmit the acquired pressure plate deployment and deployment status and pressure plate pile head voltage to the dispatch communication backend server.

[0070] The dispatch communication backend server processes the on / off status of the pressure plates and the voltage at the pressure plate terminals, as transmitted from the intelligent pressure plate acquisition terminals. When the voltage at the pressure plate terminals reaches a preset value, it sends an early warning signal to the user. This helps avoid serious consequences such as damage to electrical equipment and power system failures caused by abnormal voltage, ensuring the safety and reliability of the power system. At the same time, timely warnings buy valuable time for fault diagnosis and repair, reducing power outage time and economic losses caused by faults.

[0071] In one embodiment of this utility model, multiple pressure plate status acquisition units are equipped with tri-color lights. When the pressure plate voltage reaches a preset value, the tri-color lights above the corresponding pressure plate will flash continuously. The tri-color lights can typically be set to represent different degrees or types of voltage anomalies, such as red for severe voltage anomalies and yellow for general voltage fluctuations. Through the flashing lights and color changes, operators can quickly and intuitively understand the abnormal voltage situation of the pressure plates; the tri-color lights make the warning information more intuitive and eye-catching. During inspections or monitoring, operators can quickly obtain voltage anomaly information through the changes in the lights without having to review complex data reports. This improves the timeliness and accuracy of fault detection, helps operators react quickly, and takes appropriate measures to handle the situation, reducing misjudgments and delays caused by untimely or unintuitive information transmission, further enhancing the operational safety and reliability of the power system.

[0072] The front of the cabinet is equipped with multiple wired pressure plate status acquisition units, each with a three-color indicator light. These units collect the engagement / disengagement status of the pressure plates. A dual-sensor slot intelligent pressure plate voltage acquisition unit on the back of the cabinet collects the voltage at the pressure plate terminals. The engagement / disengagement status and voltage at the pressure plate terminals are collected by the intelligent pressure plate acquisition terminal and then sent to the dispatch communication backend server for further processing. The system has a built-in warning function; when a pressure plate voltage reaches a preset value, such as 110V, the red light above the corresponding pressure plate will flash continuously, alerting the operator that the pressure plate is energized and caution is required. The above is merely a preferred embodiment of this application and does not constitute any limitation on the application. Any person skilled in the art can make many possible variations and modifications to the technical solution of this application, or modify it into equivalent embodiments, without departing from the scope of the technical solution. Therefore, any equivalent changes made based on the shape, structure and principle of this application that do not depart from the content of the technical solution of this application shall be covered within the protection scope of this application.

Claims

1. A smart pressure plate dual-potential acquisition unit, characterized in that, include: Non-electrical quantity intelligent pressure plate voltage acquisition unit main body (01); Sensing slot 1 and sensing slot 2 are arranged side by side on the main body (01) of the non-electrical quantity intelligent pressure plate voltage acquisition unit, and are used to simultaneously sense the electric field of the two tested wires.

2. The intelligent pressure plate dual-potential acquisition unit according to claim 1, characterized in that: Coulomb meter 1 and coulomb meter 2 are connected in series in the discharge circuits of induction tank 1 and induction tank 2.

3. The intelligent pressure plate dual-potential acquisition unit according to claim 1, characterized in that: It also includes a mirror electrode plate 1 and a mirror electrode plate 2, which maintain a fixed distance from the induction slot 1 and the induction slot 2, and form a mirror electric field through electric field coupling.

4. The intelligent pressure plate dual-potential acquisition unit according to claim 3, characterized in that: The discharge circuits of the mirror electrode plate 1 and the mirror electrode plate 2 are connected in series with a coulomb charge meter 3 and a coulomb charge meter 4.

5. The intelligent pressure plate dual-potential acquisition unit according to claim 1, characterized in that: Both the sensing slot 1 and the sensing slot 2 are connected to a ground wire.

6. The intelligent pressure plate dual-potential acquisition unit according to claim 1, characterized in that: The sensing slot 1 and sensing slot 2 are fixed to the PCB of the main body (01) of the non-electrical power intelligent pressure plate voltage acquisition unit by insulating material.

7. The intelligent pressure plate dual-potential acquisition unit according to claim 1, characterized in that: The sensing slot 1 and sensing slot 2 are fixed to the outer shell of the main body (01) of the non-electrical power intelligent pressure plate voltage acquisition unit by insulating material.

8. The intelligent pressure plate dual-potential acquisition unit according to claim 1, characterized in that: Both the induction slot 1 and the induction slot 2 are connected to the charge pump 1 and the charge pump 2 via switches K1 and K2, respectively.

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