Control method of multi-safety-guarded full-intelligent monitoring and control circuit breaker device

Abstract

The application relates to a control method of a multi-safety-protection full-intelligent monitoring control circuit breaker device, relates to the technical field of line protection, and comprises the following steps: acquiring coil induction electromotive force and temperature detection data; performing data analysis on the coil induction electromotive force to determine real-time current data and current detection data; controlling preset intelligent thyristors and preset intelligent circuit breakers to perform circuit breaking protection on preset protected circuits according to the real-time current data, the temperature detection data and the current detection data; acquiring main protection capacitor data; and controlling preset auxiliary protection capacitors and preset breakdown fuses to perform circuit breaking protection on preset protected circuits according to the main protection capacitor data. The application has the effect of optimizing circuit protection.

Description

Technical Field

[0001] This application relates to the technical field of line protection, and in particular to a control method for a fully intelligent monitoring and control circuit breaker with multiple safety protection features. Background Technology

[0002] The control of a multi-safety-protection, fully intelligent monitoring and control circuit breaker device refers to the process of controlling the circuit safety switch to cut off the protected circuit when an abnormality occurs in the output of the protected circuit by detecting the state of the protected circuit.

[0003] In related technologies, when a safety switch in a control circuit disconnects power to a protected circuit, it typically employs a passive breakdown method using a breakdown-type fuse. This involves first installing a breakdown-type fuse with a certain breakdown threshold on the protected circuit. When an abnormal operating condition occurs in the protected circuit and the supply current exceeds the breakdown threshold of the breakdown-type fuse, the fuse will be passively broken down by the abnormal current, thus protecting the protected circuit under abnormal operating conditions.

[0004] Regarding the aforementioned technologies, when protecting the circuit using a breakdown fuse, the breakdown fuse lacks an active power-off control mechanism and cannot respond instantly to high-speed transient overvoltages. This results in a long response time and delayed protection action, leading to damage to circuit components and poor circuit protection performance. There is still room for improvement. Summary of the Invention

[0005] To optimize circuit protection, this application provides a control method for a fully intelligent monitoring and control circuit breaker device with multiple safety protection features.

[0006] This application provides a control method for a multi-safety-protection, fully intelligent monitoring and control circuit breaker, adopting the following technical solution: The control method for a multi-safety-protection, fully intelligent monitoring and control circuit breaker includes: Acquire coil induced electromotive force and temperature detection data; Data analysis of the induced electromotive force of the coil is performed to determine the real-time current data and current detection data; Based on real-time current data, temperature detection data, and current detection data, the preset intelligent thyristor and preset intelligent circuit breaker are controlled to provide circuit breaking protection for the preset protected circuit. Obtain the main protection capacitor data; Based on the main protection capacitor data, the preset secondary protection capacitor and preset breakdown fuse are controlled to provide circuit breaking protection for the preset protection circuit.

[0007] Optionally, the steps of analyzing the induced electromotive force of the coil to determine the real-time current data and current detection data include: Input the coil electromotive force data into the preset current back-calculation model to determine the real-time current data; Real-time current data is extracted to determine the sliding current data; Calculate the mean of the sliding current data to determine the current detection data.

[0008] Optionally, the steps of controlling a preset intelligent thyristor and a preset intelligent circuit breaker to provide circuit protection for the protected circuit based on real-time current data, temperature detection data, and current detection data include: Determine whether the current detection data is greater than the preset safe current threshold. If the value is greater than the preset sliding mode control algorithm and real-time current data, the intelligent thyristor and intelligent circuit breaker will be controlled to perform circuit breaking protection on the protected circuit. If it is not greater than, then determine whether the temperature detection data is greater than the preset working temperature threshold. If the value is greater than the specified value, the intelligent circuit breaker will be controlled to provide circuit breaking protection for the protected circuit. If the value is not greater than the specified value, the temperature and current detection data will be continuously acquired and used for cyclical judgment.

[0009] Optionally, the steps of controlling the intelligent thyristor and intelligent circuit breaker to perform circuit breaking protection on the protected circuit according to the preset sliding mode control algorithm and real-time current data include: Obtain the equivalent inductance, equivalent resistance, and rated voltage of the circuit; The controlled loop function is constructed based on real-time current data, equivalent loop inductance, equivalent loop resistance, and rated loop voltage. A first-order stable sliding surface function is constructed based on real-time current data and a preset current safety threshold. Construct an exponentially approaching function based on the first-order stable sliding surface function; The controlled loop function, the first-order stable sliding mode surface function, and the exponential approach function are combined to determine the conduction ratio of the thyristor. The intelligent thyristor controls the circuit output based on the thyristor conduction ratio, and controls the intelligent circuit breaker to provide circuit protection for the protected circuit.

[0010] Optionally, the steps of controlling a preset secondary protection capacitor and a preset breakdown fuse to provide circuit breaking protection for a preset protection circuit based on the main protection capacitor data include: Data is extracted from the main protection capacitor data to determine the main capacitor leakage current, main capacitor body temperature, and main capacitor voltage. Calculate the quotient of the main capacitor leakage current and the preset leakage current threshold to determine the leakage current risk; Calculate the quotient of the main capacitor body temperature and the preset breakdown temperature threshold to determine the capacitor temperature risk; Calculate the quotient of the main capacitor voltage and the preset breakdown voltage threshold to determine the capacitor voltage risk; The risk of capacitor breakdown is determined by weighted summation of leakage current risk, capacitor temperature risk, and capacitor voltage risk. Determine whether the risk of capacitor breakdown is greater than the preset breakdown risk threshold; If it is not greater than, the main protection capacitor data will be continuously acquired, and the capacitor breakdown risk will be calculated and judged cyclically. If the value is greater than the specified value, the secondary protection capacitor will break down the breakdown fuse, thus providing circuit break protection for the protection circuit.

[0011] In summary, this application includes at least one of the following beneficial technical effects: 1. By analyzing the coil electromotive force data, real-time current data and current detection data are determined. Then, based on the real-time current data, temperature detection data, and current detection data, the intelligent thyristor and intelligent circuit breaker are controlled to provide circuit breaking protection for the protected circuit. Finally, the main protection capacitor data is obtained, and based on the main protection capacitor data, the secondary protection capacitor data and the breakdown fuse are controlled to provide circuit breaking protection for the protection circuit. Thus, the protected circuit is protected by the intelligent circuit breaker, and a dual-capacitor mode is adopted. When the protection circuit capacitor is at risk of breakdown, the secondary protection capacitor is controlled to break down the breakdown fuse to protect the protection circuit, thereby avoiding protection circuit failure and optimizing the circuit protection effect. 2. By back-engineering the coil electromotive force into the model using the input current, the real-time current data is determined. Then, the real-time current data is extracted through a sliding window to determine the sliding current data. The average value of the sliding current data is then calculated to determine the current detection data. This allows for the extraction of real-time current data through a sliding window and the calculation of the average value as the current detection data, thereby determining the output status of the protected circuit. This avoids protection misjudgments caused by non-fault-related instantaneous errors such as electromagnetic interference and improves the stability of the protected circuit operation. 3. By judging whether the current detection data is greater than the safe current threshold, it is determined whether there is an abnormal output in the protected circuit. When the current detection data is greater than the safe current threshold, it indicates that the protected circuit has an abnormal output. Therefore, the intelligent thyristor and intelligent circuit breaker are controlled to cut off the circuit through the sliding mode control algorithm and real-time current data. When the current detection data is not greater than the safe current threshold, it indicates that the protected circuit has no abnormal output. Therefore, it is judged whether the temperature detection data is greater than the operating temperature threshold to further determine whether the protected circuit is overheating and needs to be cut off. When the temperature detection data is greater than the operating temperature threshold, it indicates that the protected circuit is overheating. Therefore, the intelligent circuit breaker is controlled to cut off the circuit. When the temperature detection data is not greater than the operating temperature threshold, temperature detection data and current detection data are continuously acquired and cyclically judged. In this way, when the output of the protected circuit is too large, the sliding mode control algorithm is used to control the output of the protected current and protect the circuit components within the response time of the intelligent circuit breaker, thereby improving the safety of the protected circuit. Attached Figure Description

[0012] Figure 1 This is a flowchart of the control method for the multi-safety protection fully intelligent monitoring and control circuit breaker device in the embodiments of this application.

[0013] Figure 2 This is a flowchart illustrating the analysis of the induced electromotive force of the coil in this embodiment of the application to determine real-time current data and current detection data.

[0014] Figure 3 This is a flowchart illustrating how a preset intelligent thyristor and a preset intelligent circuit breaker are controlled to provide circuit protection for the protected circuit based on real-time current data, temperature detection data, and current detection data in this application embodiment.

[0015] Figure 4 This is a flowchart illustrating how a smart thyristor and a smart circuit breaker are controlled to perform circuit breaking protection on the protected circuit based on a preset sliding mode control algorithm and real-time current data in an embodiment of this application.

[0016] Figure 5 This is a flowchart illustrating how a preset secondary protection capacitor and a preset breakdown fuse are controlled to provide circuit breaking protection for a preset protection circuit based on the main protection capacitor data in this embodiment of the application. Detailed Implementation

[0017] To make the purpose, technical solution, and advantages of this application clearer, the following description is provided in conjunction with the appendix. Figures 1 to 5 The present application will be further described in detail below with reference to embodiments. It should be understood that the specific embodiments described herein are for illustrative purposes only and are not intended to limit the scope of the application.

[0018] This application discloses a control method for a multi-safety protection fully intelligent monitoring and control circuit breaker device. Specifically, it discloses a processing terminal, an intelligent thyristor, an intelligent circuit breaker, and a secondary protection capacitor. The processing terminal is communicatively connected to the intelligent thyristor, the intelligent circuit breaker, and the secondary protection capacitor to achieve information interaction and control. The processing terminal acquires coil induced electromotive force, temperature detection data, and main protection capacitor data. It analyzes the coil electromotive force data to determine real-time current data and current detection data. Based on the real-time current data, temperature detection data, and current detection data, it controls the intelligent thyristor and the intelligent circuit breaker to provide circuit breaking protection for the protected circuit. Finally, it acquires the main protection capacitor data and controls the secondary protection capacitor data and a breakdown fuse to provide circuit breaking protection for the protection circuit. Thus, the intelligent circuit breaker protects the protected circuit. A dual-capacitor mode is adopted. When the protection circuit capacitor is at risk of breakdown, the secondary protection capacitor is controlled to break down the breakdown fuse to protect the protection circuit, thereby preventing protection circuit failure and optimizing the circuit protection effect.

[0019] Reference Figure 1 This application discloses a control method for a multi-safety-protection, fully intelligent monitoring and control circuit breaker device, comprising the following steps: Step S100: Acquire coil induced electromotive force and temperature detection data.

[0020] Among them, the induced electromotive force of the coil refers to the induced electromotive force of the hollow coil connected in series in the main circuit of the protected circuit. It is determined by the processing terminal by retrieving the induced electromotive force data at both ends of the hollow coil and performing data processing such as amplification and filtering.

[0021] An air-core coil is an iron-core coil that integrates self-powering, communication, and temperature detection functions. This coil is connected in series in the main circuit of the protected circuit. Based on the principle of electromagnetic induction, it achieves self-powering through the alternating current in the main circuit of the protected circuit to supply power to the protection circuit.

[0022] Temperature detection data refers to the actual temperature measurement data of the protected circuit, which is determined by the processing terminal by retrieving the measurement data of the temperature sensor installed on the surface of the main circuit conductor of the protected circuit.

[0023] Step S101: Perform data analysis on the induced electromotive force of the coil to determine the real-time current data and current detection data.

[0024] Real-time current data refers to the instantaneous current magnitude data of the protected circuit collected by the air-core coil. Current detection data refers to the real-time current data, after being smoothed by a sliding window, used to determine whether the current in the protected circuit is abnormal. Both are determined by the processing terminal through data analysis of the induced electromotive force of the coil; the specific analysis steps are described in [reference needed]. Figure 2 The steps in the process.

[0025] Step S102: Based on real-time current data, temperature detection data, and current detection data, control the preset intelligent thyristor and preset intelligent circuit breaker to perform circuit breaking protection on the preset protected circuit.

[0026] Among them, intelligent thyristors refer to electronic switching devices connected in series in the protected circuit. By adjusting the duty cycle of the protected circuit, they can quickly suppress the output of the protected circuit. Thus, when an abnormal output occurs in the protected circuit, the output of the protected circuit is suppressed before the intelligent circuit breaker completes the circuit breaking operation, thereby reducing the risk of damage to the components in the protected circuit and improving the reliability of circuit protection.

[0027] A smart circuit breaker is a motorized circuit breaker that can be controlled by communication. This device is connected in series in the protected circuit and is used to quickly respond to the circuit breaking command when a circuit breaking signal is received to provide circuit breaking protection for the protected circuit.

[0028] The protected circuit refers to the complete power transmission loop from the power input terminal to the power load terminal, such as the municipal power supply network.

[0029] After determining the real-time current data, temperature detection data, and current detection data, the intelligent thyristor and intelligent circuit breaker are controlled to provide circuit breaking protection for the protected circuit based on these data. For specific analysis steps, refer to [reference needed]. Figure 3 The steps in the process.

[0030] Step S103: Obtain the main protection capacitor data.

[0031] Among them, the main protection capacitor data refers to the electrical data of the main protection capacitor in the protection circuit, including the leakage current, the temperature of the main capacitor body, and the voltage data of the main capacitor. The processing focus is to retrieve the measurement data of the micro-current sampling circuit, the voltage sampling circuit and the thermistor on the surface of the main protection capacitor, and then integrate the corresponding leakage current data, temperature data and voltage data to determine the data.

[0032] The main protection capacitor refers to the energy storage element in the power supply circuit of the protection circuit. The protection circuit adopts a dual-capacitor mode, setting up two capacitors: a main protection capacitor and a secondary protection capacitor. The main protection capacitor is the energy storage element in the power supply circuit, and the secondary protection capacitor is used to break down the breakdown-type fuse set in the protection circuit when the main protection capacitor is at risk of breakdown, thereby providing circuit breaking protection for the protection circuit.

[0033] Step S104: Control the preset secondary protection capacitor and the preset breakdown fuse to perform circuit breaking protection on the preset protection circuit according to the main protection capacitor data.

[0034] The secondary protection capacitor is a capacitor in the protection circuit used to release a high-voltage pulse to the breakdown fuse in response to a control command when the main protection capacitor is at risk of breakdown. This pulse breaks down the mica gap inside the breakdown fuse, thus providing circuit protection for the protection circuit. It is a safety protection mechanism of the protection circuit. The secondary protection capacitor adopts an independent charging circuit and is charged through the secondary winding of the air-core coil. It is electrically isolated from the main protection capacitor through an independent rectification and voltage regulation circuit to prevent the voltage of the secondary protection capacitor from dropping when the main protection capacitor fails. When the main protection capacitor is at risk of breakdown, the secondary protection capacitor responds to the discharge command, opens the discharge switch, and instantaneously releases high-voltage energy to break down the breakdown fuse, thereby achieving circuit protection for the protection circuit.

[0035] A breakdown fuse is a one-time circuit protection device connected in series in the main circuit of the protection circuit. The breakdown fuse has a mica micropore gap inside, which is instantly broken down when the secondary protection capacitor releases high voltage energy, forming a physical circuit break.

[0036] A protection circuit is a loop that protects the circuit being protected, including air-core coils, main protection capacitors, secondary protection capacitors, and breakdown fuses.

[0037] After determining the main protection capacitor data, the auxiliary protection capacitor and the breakdown fuse are controlled according to the main protection capacitor data to provide circuit breaking protection for the protection circuit. For specific analysis steps, please refer to [link / reference needed]. Figure 5 The steps in the process.

[0038] Reference Figure 2 The steps for analyzing the induced electromotive force of the coil to determine the real-time current data and current detection data include: Step S200: Input the coil electromotive force data into the preset current back-calculation model to determine the real-time current data.

[0039] Among them, the current inverse model refers to a formulaic model based on the principle of electromagnetic induction, which uses known coil electromotive force data to inversely deduce real-time current data. The specific model formula is as follows: .

[0040] In the formula, For real-time current data, The mutual inductance coefficient is determined by the operator through measuring the magnitude of the current and induced electromotive force in the protected circuit by connecting an air-core coil to the circuit being protected. Based on Faraday's law of electromagnetic induction, the mutual inductance coefficient is then derived. This is the electromotive force data for the coil.

[0041] The real-time current data is consistent with the real-time current data in step S101, and is determined by the processing terminal by inputting the coil electromotive force data into the current back-calculation model.

[0042] Step S201: Extract data from the real-time current data to determine the sliding current data.

[0043] Among them, sliding current data refers to real-time current data extracted and determined through a sliding window, which is determined by the processing terminal through forward truncation of the real-time current data via a sliding window.

[0044] Step S202: Calculate the mean of the sliding current data to determine the current detection data.

[0045] The current detection data is consistent with the current detection data in step S101, and is determined by the processing terminal by calculating the average value of the sliding current data.

[0046] Reference Figure 3 The steps for controlling a preset intelligent thyristor and a preset intelligent circuit breaker to provide circuit protection for the protected circuit based on real-time current data, temperature detection data, and current detection data include: Step S300: Determine whether the current detection data is greater than the preset safe current threshold.

[0047] The safe current threshold refers to the maximum current value that the protected circuit can tolerate for a long period of time during normal operation. It is determined by the operator by combining the rated current of each component in the protected circuit with the analysis of the historical operating data of the protected circuit. The critical value of the current at which the protected circuit can operate stably is the safe current threshold.

[0048] By processing the terminal to determine whether the current detection data is greater than the safe current threshold, it can be determined whether there is an abnormal output in the protected circuit. Then, when there is an abnormal output in the protected circuit, output adjustment and circuit breaking protection are performed on the protected circuit to optimize the circuit protection effect.

[0049] Step S301: If the value is greater than the preset sliding mode control algorithm and real-time current data, the intelligent thyristor and intelligent circuit breaker are controlled to perform circuit breaking protection on the protected circuit.

[0050] If the processing terminal determines that the current detection data is greater than the safe current threshold, it indicates that the protected circuit has an abnormal output and requires output adjustment and circuit breaking protection. Therefore, the output of the protected circuit is controlled according to the sliding mode control algorithm, and the protected circuit is broken through the intelligent circuit breaker for circuit breaking protection. Specific analysis steps are detailed below. Figure 4 The steps in the process.

[0051] Sliding mode control algorithm refers to a control algorithm that analyzes the abnormal output of the protected circuit and quickly adjusts the on / off state of the intelligent thyristor to force the output of the protected circuit to be controlled on a sliding mode surface.

[0052] Step S302: If it is not greater than, then determine whether the temperature detection data is greater than the preset working temperature threshold.

[0053] The operating temperature threshold refers to the maximum temperature value that the protected circuit can tolerate for a long period of time during normal operation. It is determined by the operator by combining the temperature resistance rating of the protected circuit, the maximum operating temperature of each component in the circuit, and the critical value of the maximum temperature at which the protected circuit can operate stably in historical data.

[0054] If the processing terminal determines that the current detection data is not greater than the safe current threshold, it indicates that the current output of the protected circuit is normal. Therefore, it is determined whether the temperature detection data is greater than the operating temperature threshold, thereby further determining whether there is a temperature abnormality in the protected circuit. Then, when there is a temperature abnormality in the protected circuit, the circuit is disconnected to optimize the circuit protection effect.

[0055] Step S3021: If the value is greater than the specified value, then control the intelligent circuit breaker to perform circuit breaking protection on the protected circuit.

[0056] If the processing terminal determines that the temperature detection data is greater than the operating temperature threshold, it indicates that there is an abnormal temperature in the protected circuit and circuit breaking protection is required. Therefore, the intelligent circuit breaker is controlled to break the circuit of the protected circuit.

[0057] Step S3022: If it is not greater than, continue to acquire temperature detection data and current detection data for cyclic judgment.

[0058] If the processing terminal determines that the temperature detection data is not greater than the operating temperature threshold, it indicates that the protected circuit has no temperature abnormality. Therefore, the temperature detection data and current detection data are continuously acquired and judged in a loop to monitor the operating status of the protected circuit in real time.

[0059] Reference Figure 4 The steps for controlling the intelligent thyristor and intelligent circuit breaker to perform circuit breaking protection on the protected circuit according to the preset sliding mode control algorithm and real-time current data include: Step S400: Obtain the equivalent inductance, equivalent resistance, and rated voltage of the loop.

[0060] The equivalent inductance of the circuit refers to the equivalent total inductance value of the protected circuit. The total inductance data of the circuit is calculated by the processing terminal through analysis of the topology of the protected circuit.

[0061] The equivalent resistance of a circuit refers to the equivalent total resistance value of the protected circuit. The total resistance data of the circuit is calculated by the processing terminal through analysis of the topology of the protected circuit.

[0062] The rated voltage of a circuit refers to the nominal voltage data of the protected circuit, which is determined by the processing terminal through data extraction of the rated voltage parameters of the protected circuit.

[0063] Step S401: Construct the controlled loop function based on real-time current data, equivalent loop inductance, equivalent loop resistance, and rated loop voltage.

[0064] The controlled loop function refers to the simulation function of the current change in the protected loop constructed based on Kirchhoff's current law. The specific function formula is as follows: .

[0065] In the formula, For real-time current data, The equivalent inductance of the circuit, The equivalent resistance of the circuit. The rated voltage of the circuit. The thyristor conduction ratio is the same as that in step S404, and this is the value to be derived.

[0066] Step S402: Construct a first-order stable sliding mode surface function based on real-time current data and a preset current safety threshold.

[0067] The current safety threshold is consistent with the safety current threshold in step S300.

[0068] The first-order stable sliding surface function refers to the asymptotically stable first-order sliding surface function expression constructed by linearly weighted combination using the deviation function between real-time current data and the current safety threshold as the independent variable. This function uses dynamic tracking of fault current as the control objective, driving the output of the protected circuit to converge toward the sliding surface. The specific function formula is as follows: , .

[0069] In the formula, This is a function representing the deviation between real-time current data and the current safety threshold. For real-time current data, For current safety threshold, This is a sliding mode switching function used to determine whether the currently protected circuit is located within the constructed first-order sliding surface. When the value is not 0, it will trigger the conduction rate control of the intelligent thyristor to adjust the output of the protected circuit. The sliding surface convergence coefficient is used to adjust the convergence speed of the system when it converges to the sliding surface. The processing terminal first determines and estimates an initial convergence coefficient based on the interception frequency of the protected circuit, and then adjusts the initial convergence constant according to the current waveform corresponding to common fault conditions. The convergence coefficient with no high-frequency vibration and a satisfactory response speed is then determined, which is the sliding surface convergence coefficient.

[0070] Step S403: Construct an exponentially approaching function based on the first-order stable sliding surface function.

[0071] Among them, the exponential reaching function refers to the reaching function constructed using an exponential reaching rate, which ensures that the output of the protected circuit quickly approaches the first-order stable sliding surface and reduces sliding mode jitter. The specific function formula is as follows: .

[0072] In the formula, The approach rate coefficient is used to determine the speed at which the protected circuit approaches the sliding mode surface. The operator first selects an initial value within the range of the approach rate coefficient, and then adjusts the initial value based on the current waveforms corresponding to common fault conditions to determine an approach rate coefficient that achieves the required response time without significant vibration. It is a first-order stable sliding surface function. The exponential convergence coefficient is used to exponentially smooth out residual errors and reduce jitter. The operator determines the convergence coefficient by gradually increasing the exponential convergence coefficient and observing the steady-state current fluctuation amplitude. The exponential convergence coefficient corresponding to the steady-state current with the smallest fluctuation amplitude is selected as the final result.

[0073] Step S404: Combine the controlled loop function, the first-order stable sliding surface function, and the exponential approach function to determine the thyristor conduction ratio.

[0074] The thyristor conduction ratio refers to the duty cycle of the intelligent thyristor, which is determined by the processing terminal through a combination of the controlled loop function, the first-order stable sliding mode surface function, and the exponential approach function, based on the control loop function. The derivation was performed to determine this.

[0075] Step S405: Control the intelligent thyristor to control the circuit output according to the thyristor conduction ratio, and control the intelligent circuit breaker to perform circuit breaking protection on the protected circuit.

[0076] In this process, after determining the thyristor conduction ratio, the intelligent thyristor is controlled to control the circuit output based on the thyristor conduction ratio, and the intelligent circuit breaker is controlled to provide circuit protection for the protected circuit.

[0077] Reference Figure 5The steps for controlling a preset secondary protection capacitor and a preset breakdown fuse to provide circuit breaking protection for a preset protection circuit based on the main protection capacitor data include: Step S500: Extract data from the main protection capacitor to determine the main capacitor leakage current, main capacitor body temperature, and main capacitor voltage.

[0078] Among them, the main capacitor leakage current refers to the measured value of the leakage current of the main protection capacitor. The main capacitor body temperature refers to the measured value of the body temperature of the main protection capacitor. The main capacitor voltage refers to the measured value of the voltage across the main protection capacitor. All of the above data are determined by the processing terminal through data extraction from the main protection capacitor data.

[0079] Step S501: Calculate the quotient of the main capacitor leakage current and the preset leakage current threshold to determine the leakage current risk.

[0080] Among them, the leakage current threshold refers to the critical value of leakage current when the main protection capacitor fails, that is, the maximum leakage current that the main protection capacitor can allow to operate normally, which is determined by the operator based on the maximum allowable leakage current of the main protection capacitor.

[0081] Leakage current risk refers to the quantified value of the abnormality of the leakage current data of the main protection capacitor, which is determined by the processing terminal by calculating the quotient of the leakage current of the main capacitor and the leakage current threshold.

[0082] Step S502: Calculate the quotient of the main capacitor body temperature and the preset breakdown temperature threshold to determine the capacitor temperature risk.

[0083] The breakdown temperature threshold refers to the critical temperature value of the main protection capacitor when it fails, which is the maximum body temperature that the main protection capacitor can operate normally. It is determined by the operator based on the maximum allowable operating temperature of the main protection capacitor.

[0084] Capacitor temperature risk refers to the quantified value of the degree of abnormality in the temperature data of the main protection capacitor body, which is determined by the processing terminal by calculating the quotient of the main capacitor body temperature and the breakdown temperature threshold.

[0085] Step S503: Calculate the quotient of the main capacitor voltage and the preset breakdown voltage threshold to determine the capacitor voltage risk.

[0086] The breakdown voltage threshold refers to the critical voltage value at which the main protection capacitor fails, i.e., the maximum voltage that the main protection capacitor can operate normally. It is determined by the operator based on the nominal maximum allowable operating voltage of the main protection capacitor.

[0087] Capacitor voltage risk refers to the quantified value of the degree of abnormality in the main protection capacitor voltage data, which is determined by the processing terminal by calculating the quotient of the main capacitor voltage and the breakdown voltage threshold.

[0088] Step S504: Weight the leakage current risk, capacitor temperature risk, and capacitor voltage risk to determine the capacitor breakdown risk.

[0089] Among them, capacitor breakdown risk refers to the quantitative value of the risk of the main protection capacitor being broken down. It is determined by the processing terminal by weighted summation of leakage current risk, capacitor temperature risk and capacitor voltage risk. The weighted data used in the weighted summation of leakage current risk, capacitor temperature risk and capacitor voltage risk is determined by the operator by conducting offline breakdown pre-experiment on the main protection capacitor under equivalent protection circuit parameters to determine the sensitivity of the main protection capacitor to leakage current risk, capacitor temperature risk and capacitor voltage risk when a fault occurs.

[0090] Step S505: Determine whether the capacitor breakdown risk is greater than the preset breakdown risk threshold.

[0091] Among them, the breakdown risk threshold refers to the lower limit of the capacitor breakdown risk when the main protection capacitor has a high risk of breakdown and the secondary protection capacitor needs to be controlled to break down the breakdown fuse. The operator determines the critical value of the capacitor breakdown risk when the failure rate of the main protection capacitor increases significantly by conducting offline breakdown pre-experiments on the main protection capacitor under equivalent protection circuit parameters. This is the breakdown risk threshold.

[0092] By processing the terminal to determine whether the risk of capacitor breakdown is greater than the breakdown risk threshold, it is possible to determine whether there is an abnormal risk in the protection circuit, and then determine whether the protection circuit needs to be disconnected, thereby improving the reliability of the circuit protection system.

[0093] Step S5051: If it is not greater than, continue to acquire the main protection capacitor data, calculate the capacitor breakdown risk and perform cyclic judgment.

[0094] If the processing terminal determines that the capacitor breakdown risk is not greater than the breakdown risk threshold, it indicates that there is no abnormal risk in the protection circuit at this time. Therefore, the main protection capacitor data is continuously acquired, the capacitor breakdown risk is calculated and cyclically judged, so as to monitor the working status of the protected circuit in real time.

[0095] Step S5052: If the value is greater than the specified value, the secondary protection capacitor is controlled to break down the breakdown fuse to provide circuit breaking protection for the protection circuit.

[0096] If the processing terminal determines that the risk of capacitor breakdown is greater than the breakdown risk threshold, it indicates that the protection circuit is abnormal. Therefore, the secondary protection capacitor is controlled to break down the breakdown fuse to provide circuit protection and to alert the operator.

[0097] Those skilled in the art will clearly understand that, for the sake of convenience and brevity, the above-described division of functional modules is used as an example. In practical applications, the above functions can be assigned to different functional modules as needed, that is, the internal structure of the device can be divided into different functional modules to complete all or part of the functions described above. The specific working process of the system, device, and unit described above can be referred to the corresponding process in the foregoing method embodiments, and will not be repeated here.

[0098] The above are all preferred embodiments of this application and are not intended to limit the scope of protection of this application. Any feature disclosed in this specification (including the abstract and drawings) may be replaced by other equivalent or similar features unless specifically stated otherwise. That is, unless specifically stated otherwise, each feature is only one example of a series of equivalent or similar features.

Claims

1. A control method for a multi-safety-protection, fully intelligent monitoring and control circuit breaker device, characterized in that, include: Acquire coil induced electromotive force and temperature detection data; Data analysis of the induced electromotive force of the coil is performed to determine the real-time current data and current detection data; Based on real-time current data, temperature detection data, and current detection data, the preset intelligent thyristor and preset intelligent circuit breaker are controlled to provide circuit breaking protection for the preset protected circuit. Obtain the main protection capacitor data; Based on the main protection capacitor data, the preset secondary protection capacitor and preset breakdown fuse are controlled to provide circuit breaking protection for the preset protection circuit.

2. The control method for the multi-safety protection fully intelligent monitoring and control circuit breaker device according to claim 1, characterized in that, The steps for analyzing the induced electromotive force of the coil to determine real-time current data and current detection data include: Input the coil electromotive force data into the preset current back-calculation model to determine the real-time current data; Real-time current data is extracted to determine the sliding current data; Calculate the mean of the sliding current data to determine the current detection data.

3. The control method for the multi-safety protection fully intelligent monitoring and control circuit breaker device according to claim 1, characterized in that, The steps for controlling a preset intelligent thyristor and a preset intelligent circuit breaker to provide circuit protection for the protected circuit based on real-time current data, temperature detection data, and current detection data include: Determine whether the current detection data is greater than the preset safe current threshold. If the value is greater than the preset sliding mode control algorithm and real-time current data, the intelligent thyristor and intelligent circuit breaker will be controlled to perform circuit breaking protection on the protected circuit. If it is not greater than, then determine whether the temperature detection data is greater than the preset working temperature threshold. If the value is greater than the specified value, the intelligent circuit breaker will be controlled to provide circuit breaking protection for the protected circuit. If the value is not greater than the specified value, the temperature and current detection data will be continuously acquired and used for cyclical judgment.

4. The control method for the multi-safety protection fully intelligent monitoring and control circuit breaker device according to claim 3, characterized in that, The steps for controlling the intelligent thyristor and intelligent circuit breaker to perform circuit breaking protection on the protected circuit according to the preset sliding mode control algorithm and real-time current data include: Obtain the equivalent inductance, equivalent resistance, and rated voltage of the circuit; The controlled loop function is constructed based on real-time current data, equivalent loop inductance, equivalent loop resistance, and rated loop voltage. A first-order stable sliding surface function is constructed based on real-time current data and a preset current safety threshold. Construct an exponentially approaching function based on the first-order stable sliding surface function; The controlled loop function, the first-order stable sliding mode surface function, and the exponential approach function are combined to determine the conduction ratio of the thyristor. The intelligent thyristor controls the circuit output based on the thyristor conduction ratio, and controls the intelligent circuit breaker to provide circuit protection for the protected circuit.

5. The control method for the multi-safety protection fully intelligent monitoring and control circuit breaker device according to claim 1, characterized in that, The steps for controlling the preset secondary protection capacitor and the preset breakdown fuse to provide circuit breaking protection for the preset protection circuit based on the main protection capacitor data include: Data is extracted from the main protection capacitor data to determine the main capacitor leakage current, main capacitor body temperature, and main capacitor voltage. Calculate the quotient of the main capacitor leakage current and the preset leakage current threshold to determine the leakage current risk; Calculate the quotient of the main capacitor body temperature and the preset breakdown temperature threshold to determine the capacitor temperature risk; Calculate the quotient of the main capacitor voltage and the preset breakdown voltage threshold to determine the capacitor voltage risk; The risk of capacitor breakdown is determined by weighted summation of leakage current risk, capacitor temperature risk, and capacitor voltage risk. Determine whether the risk of capacitor breakdown is greater than the preset breakdown risk threshold; If it is not greater than, the main protection capacitor data will be continuously acquired, and the capacitor breakdown risk will be calculated and judged cyclically. If the value is greater than the specified value, the secondary protection capacitor will break down the breakdown fuse, thus providing circuit break protection for the protection circuit.

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