Device detection and maintenance method and system for rapid breaking device of ultra-high-speed circuit breaker

Abstract

The invention provides a device detection and maintenance method and system for a rapid breaking device of an ultra-high-speed circuit breaker, and relates to the technical field of circuit breakers, and the method comprises the steps: transmitting an experiment detection instruction to AC power supply simulation equipment; receiving the energy storage branch current fed back by the first current transformer, the main branch current fed back by the second current transformer and the energy storage capacitor voltage at the two ends of the zero-crossing energy storage capacitor fed back by the voltage transformer in real time; energy storage capacitor capacity is calculated and generated according to the multiple energy storage branch currents and the multiple energy storage capacitor voltages; according to the capacity of the energy storage capacitor and a preset aging capacitor capacity threshold value, the estimated service life of the zero-crossing energy storage capacitor is calculated and generated. According to the application, the fault model signal is sent to the rapid breaking device of the ultra-high-speed circuit breaker through the alternating current power supply simulation equipment, so that the rapid breaking device of the ultra-high-speed circuit breaker acts, and the rapid breaking device of the ultra-high-speed circuit breaker can be inspected and maintained conveniently.

Description

Technical Field

[0001] The present invention relates to the technical field of circuit breakers, and in particular to a device detection and maintenance method and system based on an ultra-high-speed circuit breaker fast-breaking device. Background Art

[0002] With the continuous development of the economy, the electricity load of enterprises has increased dramatically. When a fault occurs in the power supply circuit of the power grid, it will cause great harm to the electrical equipment and even the entire power supply network. The goal is to quickly remove the fault and reduce the impact of the fault on the power supply system.

[0003] like Figure 1 As shown in the related art, there is an ultra-high-speed circuit breaker breaking device, including an ultra-high-speed circuit breaker and an artificial zero-crossing branch connected in parallel to the ultra-high-speed circuit breaker. The artificial zero-crossing branch includes a zero-crossing energy storage capacitor, a first vacuum trigger switch and a modulation inductor connected in series in sequence. A zinc oxide resistor is also connected in parallel to the zero-crossing energy storage unit composed of the zero-crossing energy storage capacitor and the first vacuum trigger switch.

[0004] At the same time, a first current transformer is installed between the zero-crossing energy storage capacitor and the first vacuum trigger switch, a second current transformer is installed on the branch where the ultra-high-speed circuit breaker is located, and a voltage transformer is installed at both ends of the zero-crossing energy storage capacitor. When a system short-circuit fault is detected, the first vacuum trigger switch is controlled to close. The combined action of the zero-crossing energy storage capacitor and the modulation inductor will superimpose a reverse current on the ultra-high-speed circuit breaker, creating an artificial zero-crossing point in the ultra-high-speed circuit breaker.

[0005] However, during the long-term use of the ultra-high-speed circuit breaker switching device, or during the production and inspection of the ultra-high-speed circuit breaker switching device, the device may age or there may be production differences, so inspection and maintenance management are required. Summary of the Invention

[0006] In order to facilitate the detection, maintenance and management of ultra-high-speed circuit breaker switching devices, the present application provides a device detection and maintenance method and system based on an ultra-high-speed circuit breaker fast-breaking device.

[0007] In a first aspect, the present application provides a device detection and maintenance method based on an ultra-high-speed circuit breaker rapid-breaking device, which adopts the following technical solution: A device detection and maintenance method based on an ultra-high-speed circuit breaker rapid-breaking device, the method comprising: Sending experimental detection instructions to the AC power simulation device; Receive in real time the energy storage branch current fed back by the first current transformer, the main branch current fed back by the second current transformer, and the energy storage capacitor voltage at both ends of the zero-crossing energy storage capacitor fed back by the voltage transformer; Calculating and generating the energy storage capacitor capacity according to the multiple energy storage branch currents and the multiple energy storage capacitor voltages; An estimated service life of the zero-crossing energy storage capacitor is calculated based on the energy storage capacitor capacity and a preset aging capacitor capacity threshold.

[0008] Optionally, calculating and generating the energy storage capacitor capacity according to the multiple energy storage branch currents and the multiple energy storage capacitor voltages includes: Among the multiple energy storage capacitor voltages, capturing the initial energy storage voltage and the discharge termination voltage of the zero-crossing energy storage capacitor, and calculating and generating the energy storage voltage difference; The energy storage capacitor capacity is calculated and generated according to the multiple energy storage branch currents, the times corresponding to the multiple energy storage branch currents, and the energy storage voltage difference.

[0009] Optionally, a reference energy storage unit is connected in parallel to the zero-crossing energy storage unit, wherein the reference energy storage unit includes a reference energy storage capacitor group and a second vacuum trigger switch connected in series; After the experimental detection instruction is sent to the AC power simulation device, the method further includes: Obtaining a frequency of change in a test current at an end of the modulated inductor away from the first vacuum triggered switch; After calculating and generating the energy storage capacitor capacity according to the plurality of energy storage branch currents and the plurality of energy storage capacitor voltages, the method further includes: Adjusting the reference capacitance capacity of the reference energy storage capacitor group according to the energy storage capacitor capacity; Sending a control detection instruction to the AC power supply simulation device, and sending a closing instruction to the second vacuum trigger switch after detecting the fault current; Obtaining a reference current variation frequency of the modulated inductor away from an end of the second vacuum triggered switch, and generating a capacitance estimation error value based on the reference current variation frequency and the test current variation frequency; The energy storage capacitor capacity is updated according to the reference capacitor capacity and the capacitance estimation error value.

[0010] Optionally, generating a capacitance estimation error value according to the control current change frequency and the test current change frequency includes: Calculating and generating a first estimated capacity according to the test current variation frequency and a pre-stored inductive reactance value of the modulation inductor; Calculating and generating a second estimated capacity according to the reference current variation frequency and the inductive reactance value of the modulation inductor; A capacitance estimation error value is calculated and generated according to a difference between the second estimated capacity and the first estimated capacity.

[0011] Optionally, the updating the energy storage capacitor capacity according to the comparison capacitor capacity and the capacitance estimation error value comprises: If the capacitance estimation error value is greater than a preset capacitance calculation error threshold, a comparison adjustment capacitor capacity is calculated according to the capacitance estimation error value and the comparison capacitor capacity, and the energy storage capacitor capacity is updated according to the comparison adjustment capacitor capacity; If the capacitance estimation error value is less than or equal to the capacitance calculation error threshold, the energy storage capacitor capacity is updated according to the comparison capacitor capacity.

[0012] Optionally, the calculating the estimated service life of the zero-crossing energy storage capacitor according to the energy storage capacitor capacity and the preset aging capacitor capacity threshold comprises: Obtaining a current environmental temperature of the ultra-high-speed circuit breaker fast breaking device; According to the preset environmental temperature influence data and the current environmental temperature, a current temperature influence coefficient is generated, and the environmental temperature influence data comprises a plurality of temperature influence coefficients and a plurality of corresponding temperature values; According to the energy storage capacitor capacity and the current temperature influence coefficient, a current differential exclusion capacitor capacity is calculated; According to the pre-stored capacitor aging curve data, the aging capacitor capacity threshold and the current differential exclusion capacitor capacity, an estimated service life is calculated.

[0013] Optionally, the calculating the estimated service life according to the pre-stored capacitor aging curve data, the aging capacitor capacity threshold and the current differential exclusion capacitor capacity comprises: Obtaining historical environmental temperature information of the working environment of the ultra-high-speed circuit breaker fast breaking device, and screening a historical peak environmental temperature from the historical environmental temperature information; According to the historical peak environmental temperature and the environmental temperature influence data, a peak temperature influence coefficient is generated; According to the peak temperature influence coefficient and the aging capacitor capacity threshold, a peak differential exclusion capacitor capacity is calculated; According to the current differential exclusion capacitor capacity, the peak differential exclusion capacitor capacity and the capacitor aging curve data, an estimated service life is generated.

[0014] In a second aspect, the application provides a device detection and maintenance system based on an ultra-high-speed circuit breaker fast breaking device, which adopts the following technical scheme: A device detection and maintenance system based on an ultra-high-speed circuit breaker fast breaking device, the system comprising an alternating current power supply simulation device and a detection and maintenance processing terminal, the detection and maintenance processing terminal comprising: The control instruction sending module is configured to send an experiment detection instruction to the AC power supply simulation device. The information receiving module is configured to receive in real time the energy storage branch current fed back by the first current transformer, the main trunk branch current fed back by the second current transformer, and the energy storage capacitor voltage across the zero-crossing energy storage capacitor fed back by the voltage transformer. The capacitor capacity calculation processing module is configured to calculate the energy storage capacitor capacity according to the plurality of energy storage branch currents and the plurality of energy storage capacitor voltages. The capacitor life estimation module is configured to calculate the estimated service life of the zero-crossing energy storage capacitor according to the energy storage capacitor capacity and a preset aged capacitor capacity threshold.

[0015] In a third aspect, the present application provides a detection and maintenance processing terminal, which adopts the technical scheme as follows: A detection and maintenance processing terminal, comprising a processor and a memory, wherein the memory stores at least one instruction, at least one program, a code set or an instruction set, and the at least one instruction, the at least one program, the code set or the instruction set is loaded and executed by the processor to realize the device detection and maintenance method based on the ultra-high-speed circuit breaker fast breaking device as described in the first aspect.

[0016] In a fourth aspect, the present application provides a computer-readable storage medium, which adopts the technical scheme as follows: A computer-readable storage medium, wherein the storage medium stores at least one instruction, at least one program, a code set or an instruction set, and the at least one instruction, the at least one program, the code set or the instruction set is loaded and executed by the processor to realize the device detection and maintenance method based on the ultra-high-speed circuit breaker fast breaking device as described in the first aspect.

[0017] In summary, the present application includes at least one of the following beneficial technical effects: In the present application, first, the AC power supply simulation device sends a fault model signal to the ultra-high-speed circuit breaker fast breaking device, so that the ultra-high-speed circuit breaker fast breaking device acts, thereby facilitating the inspection and maintenance of the ultra-high-speed circuit breaker fast breaking device; By the discharge process of the zero-crossing energy storage capacitor during the action of the ultra-high-speed circuit breaker fast breaking device, the estimated service life of the zero-crossing energy storage capacitor is calculated, thereby reducing the possibility of abnormal operation of the ultra-high-speed circuit breaker fast breaking device; In the present application, first, the discharge current of the zero-crossing energy storage capacitor and the voltage difference before and after discharge are calculated to calculate the energy storage capacitor capacity, and then the error value of the capacity value between the zero-crossing energy storage capacitor and the control energy storage capacitor group is calculated by setting the control energy storage capacitor group, thereby reducing the measurement and calculation errors that may be caused by data acquisition and device aging. BRIEF DESCRIPTION OF DRAWINGS

[0018] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings needed to be used in the embodiments will be briefly introduced. Obviously, the drawings in the following description are only some embodiments of the present application, and other drawings can be obtained by those skilled in the art without any creative effort based on these drawings.

[0019] Figure 1 is a circuit schematic diagram of a related art ultra-high speed circuit breaker opening device.

[0020] Figure 2 is a circuit schematic diagram of an ultra-high speed circuit breaker fast opening device and an alternating current power supply simulation device provided by the embodiments of the present application.

[0021] Figure 3 is a flowchart of a device detection and maintenance method based on the ultra-high speed circuit breaker fast opening device provided by the embodiments of the present application.

[0022] Figure 4 is a flowchart of updating the capacity of an energy storage capacitor provided by the embodiments of the present application.

[0023] Figure 5 is a flowchart of calculating the estimated service life of a zero-crossing energy storage capacitor provided by the embodiments of the present application. DETAILED DESCRIPTION

[0024] In order to make the objects, technical solutions and advantages of the present application more clear, the following will combine the attached drawings to make a further detailed description. Figures 2-5 The embodiments of the present application will be further described in detail.

[0025] The present application provides an ultra-high speed circuit breaker fast opening device, as shown in the figure, which comprises an ultra-high speed circuit breaker and an artificial zero-crossing branch connected in parallel to the ultra-high speed circuit breaker. Figure 2

[0026] The artificial zero-crossing branch comprises a zero-crossing energy storage capacitor, a first vacuum trigger switch and a modulation inductor connected in series.

[0027] The zero-crossing energy storage unit is connected in parallel with a zinc oxide resistor, and the zero-crossing energy storage unit is also connected in parallel with a contrast energy storage unit.

[0028] ​In addition, a first current transformer is arranged between the zero-crossing energy storage capacitor and the first vacuum trigger switch, a third current transformer is arranged between the contrast energy storage capacitor group and the second vacuum trigger switch, a second current transformer is arranged on the branch of the ultra-high speed circuit breaker, and a voltage transformer is arranged at both ends of the zero-crossing energy storage capacitor.

[0029] The embodiment of the present application also provides a device detection and maintenance method based on the ultra-high speed circuit breaker fast breaking device, which can be applied to a device detection and maintenance system based on the ultra-high speed circuit breaker fast breaking device, wherein the device detection and maintenance system based on the ultra-high speed circuit breaker fast breaking device is composed of an alternating current power supply simulation device, a detection and maintenance processing terminal and the ultra-high speed breaking device, and a circuit schematic diagram of the ultra-high speed circuit breaker fast breaking device and the alternating current power supply simulation device can be as shown in Figure 2

[0030] The output end of the alternating current power supply simulation device is connected with the ultra-high speed circuit breaker, one control end of the detection and maintenance processing terminal is electrically connected with the control end of the alternating current power supply simulation device, a plurality of input ends of the detection and maintenance processing terminal are also respectively electrically connected with the output ends of the first current transformer, the second current transformer, the third current transformer and the voltage transformer, and one input end of the detection and maintenance processing terminal is also electrically connected with the modulated inductor away from the first vacuum trigger switch.

[0031] The execution subject of the method can be the detection and maintenance processing terminal in the device detection and maintenance system based on the ultra-high speed circuit breaker fast breaking device, and the method is realized with the aid of the alternating current power supply simulation device.

[0032] The processing flow shown in Figure 3 will be described in detail below in combination with a specific embodiment, and the content can be as follows: Step S101, sending an experimental detection instruction to the alternating current power supply simulation device.

[0033] In implementation, the detection and maintenance processing terminal sends an experimental detection instruction to the alternating current power supply simulation device, the alternating current simulation device is an alternating current generator, and the alternating current simulation device provides alternating current power for the ultra-high speed circuit breaker fast breaking device in the manner of first supplying stable alternating current and then simulating single-phase grounding fault current.

[0034] Step S102, real-time receiving of the energy storage branch current fed back by the first current transformer, the main trunk branch current fed back by the second current transformer and the energy storage capacitor voltage at both ends of the zero-crossing energy storage capacitor fed back by the voltage transformer.

[0035] In implementation, the detection and maintenance processing terminal real-time receives the data fed back by the first current transformer, the second current transformer and the voltage transformer after sending the experimental detection instruction to the alternating current power supply simulation device. ​

[0036] Wherein, the current value fed back by the first current transformer can be called the energy storage branch current, the current value fed back by the second current transformer can be called the main branch current, and the voltage value fed back by the voltage transformer chain can be called the energy storage capacitor voltage.

[0037] Step S103, calculating the energy storage capacitor capacity according to the plurality of energy storage branch currents and the plurality of energy storage capacitor voltages.

[0038] In implementation, the detection and maintenance processing terminal calculates the energy storage capacitor capacity according to the plurality of energy storage branch currents and the energy storage capacitor voltages monitored in real time.

[0039] Specifically, the step of calculating the energy storage capacitor capacity is as follows: Among the plurality of energy storage capacitor voltages, the initial energy storage voltage and the discharge termination voltage of the zero-crossing energy storage capacitor are captured, and the energy storage voltage difference is calculated.

[0040] In implementation, the detection and maintenance processing terminal captures the initial energy storage voltage of the zero-crossing energy storage capacitor in the initial stage of discharge and the discharge termination voltage of the zero-crossing energy storage capacitor after the discharge is completed among the plurality of energy storage capacitor voltages, and further, the detection and maintenance processing terminal subtracts the initial energy storage voltage from the discharge termination voltage to calculate the energy storage voltage difference.

[0041] In this application, after the detection and maintenance processing terminal sends the experimental detection instruction to the alternating current power supply simulation device, and detects the fault current through the main branch current fed back by the second current transformer, the first vacuum trigger switch is controlled to close, at which time the zero-crossing energy storage capacitor starts to discharge. Then, under the joint action of the zero-crossing energy storage capacitor and the modulated inductor, a high-frequency resonant current is forced to be superimposed on the ultra-high-speed circuit breaker, a zero-crossing point is artificially created, and the current zero-crossing arc-extinguishing chamber of the ultra-high-speed circuit breaker is forced to extinguish. After the ultra-high-speed circuit breaker is opened at the artificially created zero-crossing point, the first vacuum trigger switch is controlled to open, and the discharge of the zero-crossing energy storage capacitor ends.

[0042] It should be noted that since the voltage directions and current directions before and after the initial energy storage voltage and the discharge termination voltage discharge may be different, the positive and negative values can be carried to facilitate calculation and processing, and the absolute value of the calculated energy storage capacitor capacity is taken as the calculation result.

[0043] According to the plurality of energy storage branch currents, the time corresponding to the plurality of energy storage branch currents, and the energy storage voltage difference, the energy storage capacitor capacity is calculated.

[0044] In implementation, the detection and maintenance processing terminal first calculates the discharge charge of the zero-crossing energy storage capacitor according to the plurality of energy storage branch currents and the discharge time of the zero-crossing energy storage capacitor, and the specific formula is as follows: ; wherein, is the discharge charge amount of the capacitor, and are the start time and the end time of the discharge of the zero-crossing energy storage capacitor, is the capacitor energy consumption current flowing through the capacitor energy consumption branch.

[0045] Then the maintenance processing terminal detects the discharge charge amount of the zero-crossing energy storage capacitor and the energy storage voltage difference, and calculates the energy storage capacitor capacity. The specific formula is as follows: ; wherein, is the energy storage capacitor capacity, is the voltage change value.

[0046] In step S104, the estimated service life of the zero-crossing energy storage capacitor is calculated according to the energy storage capacitor capacity and the preset aging capacitor capacity threshold.

[0047] In implementation, the capacitor aging curve data is also pre-stored in the detection and maintenance processing terminal, wherein the capacitor aging curve data is used to reflect the corresponding relationship between the use time and the capacitor capacity of the capacitor of the same model as the zero-crossing energy storage capacitor.

[0048] The detection and maintenance processing terminal matches the corresponding use time in the capacitor aging curve data according to the preset aging capacitor capacity threshold and the energy storage capacitor capacity, and calculates the estimated service life of the zero-crossing energy storage capacitor according to the difference between the two matched use times.

[0049] In the present application, the fault model signal is sent to the ultra-high-speed circuit breaker fast breaking device through the alternating current power supply simulation device, so that the ultra-high-speed circuit breaker fast breaking device acts, thereby facilitating the inspection and maintenance of the ultra-high-speed circuit breaker fast breaking device. In addition, the estimated service life of the zero-crossing energy storage capacitor is calculated through the discharge process of the zero-crossing energy storage capacitor during the action of the ultra-high-speed circuit breaker fast breaking device, thereby reducing the possibility of abnormal work of the ultra-high-speed circuit breaker fast breaking device.

[0050] Optionally, after step S101, there is a process as shown in Figure 4 The specific process flow is as follows: In step S201, the inspection current change frequency of the modulated inductor away from the end of the first vacuum trigger switch is obtained.

[0051] In implementation, the detection maintenance processing terminal acquires the current variation frequency of the modulation inductance away from the end of the first vacuum trigger switch, and the current variation frequency acquired here is the current variation frequency acquired when the first vacuum trigger switch is in the closing stage after the detection maintenance processing terminal sends the experimental detection instruction to the alternating current power supply simulation device, and the current variation frequency acquired here is referred to as the test current variation frequency.

[0052] In addition, after step S103, there is also the processing as shown in Figure 4 The specific processing flow is as follows: Step S202, adjust the reference capacitor capacity of the reference energy storage capacitor group according to the energy storage capacitor capacity.

[0053] In implementation, the detection maintenance processing terminal adjusts the reference capacitor capacity of the reference energy storage capacitor group according to the energy storage capacitor capacity, so as to further verify the reference experiment through the reference energy storage capacitor group.

[0054] Step S203, send a reference detection instruction to the alternating current power supply simulation device, and send a closing instruction to the second vacuum trigger switch after detecting a fault current.

[0055] In implementation, the detection maintenance processing terminal sends a reference detection instruction to the alternating current simulation device. After the alternating current simulation device receives the reference detection instruction, the reference energy storage unit is the same as the zero-crossing energy storage unit, so that the reference energy storage unit experiences a discharge process.

[0056] Specifically, after the detection maintenance processing terminal sends a reference detection instruction to the alternating current power supply simulation device, and after detecting a fault current through the main branch current feedback by the second current transformer, the second vacuum trigger switch is controlled to be closed, at which time the reference energy storage capacitor group starts to discharge. Then under the joint action of the reference energy storage capacitor group and the modulation inductance, a high-frequency resonant current is forced to be superimposed on the ultra-high-speed circuit breaker, a zero-crossing point is artificially manufactured, and the current zero-crossing arc extinguishing chamber of the ultra-high-speed circuit breaker is forced to be extinguished. After the ultra-high-speed circuit breaker is opened at the artificially manufactured zero-crossing point, the second vacuum trigger switch is controlled to be opened, and the discharge of the reference energy storage capacitor group ends.

[0057] In addition, the detection maintenance processing terminal receives the current value fed back by the first current transformer in real time, and the fed back current value is referred to as the reference main current.

[0058] Step S204, acquire the reference current variation frequency of the modulation inductance away from the end of the second vacuum trigger switch, and generate a capacity estimation error value according to the reference current variation frequency and the test current variation frequency.

[0059] In implementation, the detection maintenance processing terminal acquires the current change frequency of the modulation inductance away from the end of the second vacuum trigger switch, and the current change frequency collected here is the current change frequency collected when the second vacuum trigger switch is in the closing stage after the detection maintenance processing terminal sends the contrast detection instruction to the alternating current power supply simulation device, and the current change frequency collected here is called the contrast current change frequency.

[0060] Further, the detection maintenance processing terminal calculates the capacitance value estimation error value between the contrast storage capacitor group and the zero-crossing storage capacitor through the contrast current change frequency and the test current change frequency.

[0061] Specifically, the processing steps for calculating the capacitance value estimation error value are as follows: According to the test current change frequency and the inductance value of the modulation inductance stored in advance, a first estimated capacitance is calculated; According to the contrast current change frequency and the inductance value of the modulation inductance, a second estimated capacitance is calculated; According to the difference between the second estimated capacitance and the first estimated capacitance, a capacitance value estimation error value is calculated.

[0062] In implementation, the detection maintenance processing terminal has the inductance value of the modulation inductance stored in advance.

[0063] The detection maintenance processing terminal calculates the first estimated capacitance value through the following formula: ; Wherein, the test current change frequency, the first estimated capacitance value, the inductance value of the modulation inductance.

[0064] The detection maintenance processing terminal calculates the second estimated capacitance value through the following formula: ; Wherein, the contrast current change frequency, the second estimated capacitance value.

[0065] Then the detection maintenance processing terminal generates a capacitance value estimation error value from the difference between the second estimated capacitance and the first estimated capacitance.

[0066] Step S205, update the storage capacitor capacitance according to the contrast capacitor capacitance and the capacitance value estimation error value.

[0067] In implementation, the detection maintenance processing terminal updates the storage capacitor capacitance by superimposing the contrast capacitor capacitance and the capacitance value estimation error value.

[0068] Specifically, the processing steps for updating the storage capacitor capacitance are as follows: If the capacitance estimation error value is greater than the preset capacitance calculation error threshold, a reference adjustment capacitance capacity is generated based on the capacitance estimation error value and the reference capacitance capacity, and the energy storage capacitance capacity is updated based on the reference adjustment capacitance capacity; If the capacitance estimation error value is less than or equal to the capacitance calculation error threshold, the energy storage capacitor capacity is updated according to the comparison capacitor capacity.

[0069] During implementation, the detection and maintenance processing terminal compares the capacitance estimation error value with the capacitance calculation error threshold. The comparison results are as follows: Case 1: The capacitance estimation error is greater than the capacitance calculation error threshold, and the first estimated capacity is greater than the second estimated capacity. The detection and maintenance processing terminal superimposes the capacitance estimation error and the reference capacitance to calculate a reference adjusted capacitance, and then updates the energy storage capacitance with the calculated reference adjusted capacitance. Case 1: The capacitance estimation error is greater than the capacitance calculation error threshold, and the first estimated capacity is less than the second estimated capacity. The detection and maintenance processing terminal subtracts the capacitance estimation error from the reference capacitance to calculate a reference adjusted capacitance, and then updates the energy storage capacitance with the calculated reference adjusted capacitance. Case 2: If the capacitance estimation error is less than or equal to the capacitance calculation error threshold, the energy storage capacitor capacity is updated based on the comparison capacitor capacity.

[0070] In this application, the discharge current of the zero-crossing energy storage capacitor and the voltage difference before and after discharge are calculated to generate the energy storage capacitor capacity. Then, by establishing a reference energy storage capacitor group, the capacitance error between the zero-crossing energy storage capacitor and the reference energy storage capacitor group is estimated, thereby reducing the measurement and calculation errors that may be caused by data acquisition and device aging.

[0071] Optionally, in step S104, there is also the following Figure 5 The specific operation process is as follows: Step S301: obtaining the current ambient temperature of the ultra-high-speed circuit breaker fast-breaking device.

[0072] During implementation, the detection and maintenance processing terminal can obtain the current ambient temperature of the ultra-high-speed circuit breaker rapid-breaking device in its current working environment through a temperature sensor.

[0073] Step S302: generating a current temperature influence coefficient according to preset ambient temperature influence data and the current ambient temperature, wherein the ambient temperature influence data includes a plurality of temperature influence coefficients and a plurality of corresponding temperature values.

[0074] In implementation, the detection maintenance processing terminal has preset environmental temperature influence data, the environmental temperature influence data includes a plurality of temperature influence coefficients and corresponding plurality of temperature values, the environmental temperature influence data here can be obtained from experiments in the laboratory, wherein the temperature influence coefficient is used to reflect the proportion of the capacity value of the zero-crossing energy storage capacitor changing with the environment. It should be noted that, in order to facilitate understanding, a standard environmental temperature can be set, and the temperature influence coefficient at this temperature is 1.

[0075] The detection maintenance processing terminal matches the corresponding temperature influence coefficient in the environmental temperature influence data through the current environmental temperature, and the matched temperature influence coefficient is called the current temperature influence coefficient.

[0076] In step S303, the current differentiated exclusion capacitor capacity is calculated according to the energy storage capacitor capacity and the current temperature influence coefficient.

[0077] In implementation, the detection maintenance processing terminal multiplies the updated energy storage capacitor capacity and the current temperature influence coefficient to calculate the current differentiated exclusion capacitor capacity.

[0078] In step S304, the estimated service life is calculated according to the pre-stored capacitor aging curve data, the aging capacitor capacity threshold and the current differentiated exclusion capacitor capacity.

[0079] In implementation, the detection maintenance processing terminal has pre-stored capacitor aging curve data, which is used to reflect the corresponding relationship between the capacity value and the use time during the aging process of the zero-crossing energy storage capacitor.

[0080] The detection maintenance processing terminal matches two use times in the capacitor aging curve data through the aging capacitor capacity threshold and the current differentiated exclusion capacitor capacity, and then calculates the estimated service life according to the difference between the two use times.

[0081] The detection maintenance processing terminal excludes the influence of temperature on the estimation of the estimated service life by collecting the current environmental temperature.

[0082] Optionally, in step S304, the following processing mode also exists, and the specific operation process is as follows: The historical environmental temperature information of the working environment of the ultra-high-speed circuit breaker fast breaking device is obtained, and the historical peak environmental temperature is selected from the historical environmental temperature information.

[0083] In implementation, the detection maintenance processing terminal obtains the historical environmental temperature information of the working environment of the ultra-high-speed circuit breaker fast breaking device, and the historical environmental temperature information here can be a plurality of historical temperature values in a year.

[0084] Then, the highest historical environment temperature value in the historical environment temperature information of the maintenance processing terminal is screened out, and the highest historical environment temperature value is referred to as a historical peak environment temperature.

[0085] According to the historical peak environment temperature and the environment temperature influence data, a peak temperature influence coefficient is generated.

[0086] In implementation, the maintenance processing terminal matches the corresponding temperature influence coefficient in the environment temperature influence data according to the historical peak environment temperature, and the matched temperature influence coefficient is referred to as a peak temperature influence coefficient.

[0087] According to the peak temperature influence coefficient and the aging capacitor threshold, a peak differential exclusion capacitor capacity is calculated and generated.

[0088] In implementation, the maintenance processing terminal generates a peak differential exclusion capacitor threshold by dividing the aging capacitor threshold by the peak temperature influence coefficient.

[0089] It can be understood that, under the historical peak environment temperature, if the actual capacitor value of the zero-crossing energy storage capacitor reaches the aging capacitor threshold, the zero-crossing energy storage capacitor is placed again at the corresponding capacitor value under the standard environment temperature, which can be referred to as a peak differential exclusion capacitor threshold.

[0090] According to the current differential exclusion capacitor capacity, the peak differential exclusion capacitor capacity, and the capacitor aging curve data, an estimated service life is generated.

[0091] In implementation, the maintenance processing terminal matches two service life lengths in the capacitor aging curve data according to the current differential exclusion capacitor capacity and the peak differential exclusion capacitor capacity, respectively, and then calculates and generates the estimated service life according to the difference between the two service life lengths, so as to further exclude the error caused by temperature on the estimated service life estimation.

[0092] The application also discloses a device detection and maintenance system based on a super-high-speed circuit breaker fast breaking device, which comprises an alternating current power supply simulation device, a detection and maintenance processing terminal, and a super-high-speed breaking device. The control instruction sending module is configured to send an experimental detection instruction to the alternating current power supply simulation device. The information receiving module is configured to receive, in real time, the energy storage branch current fed back by the first current transformer, the main branch current fed back by the second current transformer, and the energy storage capacitor voltage across the zero-crossing energy storage capacitor fed back by the voltage transformer. The capacitor threshold calculation processing module is configured to calculate and generate the energy storage capacitor capacity according to the plurality of energy storage branch currents and the plurality of energy storage capacitor voltages. The capacitor life estimation module is configured to calculate the estimated service life of the zero-crossing energy storage capacitor according to the energy storage capacitor capacity and a preset aged capacitor capacity threshold.

[0093] Optionally, the capacitor capacity calculation processing module is specifically configured to: Among the plurality of energy storage capacitor voltages, the initial energy storage voltage and the discharge termination voltage of the zero-crossing energy storage capacitor are captured, and an energy storage voltage difference is calculated and generated; According to the plurality of energy storage branch currents, the time corresponding to the plurality of energy storage branch currents, and the energy storage voltage difference, the energy storage capacitor capacity is calculated and generated.

[0094] Optionally, the detection and maintenance processing terminal can further include: The capacitor capacity updating module is configured to obtain a test current frequency variation of the modulation inductor away from the end portion of the first vacuum trigger switch; According to the energy storage capacitor capacity, the reference capacitor capacity of the reference energy storage capacitor group is adjusted; The detection and maintenance processing terminal sends a reference detection instruction to the alternating current power supply simulation device, and sends a closing instruction to the second vacuum trigger switch after detecting a fault current; The detection and maintenance processing terminal obtains a reference current frequency variation of the modulation inductor away from the end portion of the second vacuum trigger switch, and generates a capacity estimation error value according to the reference current frequency variation and the test current frequency variation; According to the reference capacitor capacity and the capacity estimation error value, the energy storage capacitor capacity is updated.

[0095] Optionally, the capacitor capacity calculation processing module can be further configured to: According to the test current frequency variation and the inductive reactance value of the modulation inductor stored in advance, a first estimated capacity is calculated and generated; According to the reference current frequency variation and the inductive reactance value of the modulation inductor, a second estimated capacity is calculated and generated; According to the difference between the second estimated capacity and the first estimated capacity, a capacity estimation error value is calculated and generated.

[0096] Optionally, the capacitor capacity updating module can be further configured to: If the capacity estimation error value is greater than a preset capacity calculation error threshold, a reference adjustment capacitor capacity is calculated and generated according to the capacity estimation error value and the reference capacitor capacity, and the energy storage capacitor capacity is updated according to the reference adjustment capacitor capacity; If the capacity estimation error value is less than or equal to the capacity calculation error threshold, the energy storage capacitor capacity is updated according to the reference capacitor capacity.

[0097] Optionally, the capacitor capacity calculation processing module is specifically configured to: The current environmental temperature of the ultra-high-speed circuit breaker fast breaking device is obtained; According to the preset ambient temperature influence data and the current ambient temperature, a current temperature influence coefficient is generated, and the ambient temperature influence data includes a plurality of temperature influence coefficients and a plurality of corresponding temperature values; According to the energy storage capacitor capacity and the current temperature influence coefficient, a current differentiated exclusion capacitor capacity is generated by calculation; According to the pre-stored capacitor aging curve data, the aging capacitor capacity threshold and the current differentiated exclusion capacitor capacity, an estimated service life is generated by calculation.

[0098] Optionally, the capacitor capacity calculation processing module can also be used for: Obtaining historical ambient temperature information of the working environment of the ultra-high-speed circuit breaker fast breaking device, and screening a historical peak ambient temperature from the historical ambient temperature information; According to the historical peak ambient temperature and the ambient temperature influence data, a peak temperature influence coefficient is generated; According to the peak temperature influence coefficient and the aging capacitor capacity threshold, a peak differentiated exclusion capacitor capacity is generated by calculation; According to the current differentiated exclusion capacitor capacity, the peak differentiated exclusion capacitor capacity and the capacitor aging curve data, an estimated service life is generated.

[0099] The detection and maintenance processing terminal provided in the embodiments of the present application can have great differences due to different configurations or performances, and can include one or more central processing units (for example, one or more processors) and memories, and one or more storage media (for example, one or more mass storage devices) for storing application programs or data. The memories and the storage media can be temporary storage or persistent storage. The programs stored in the storage media can include one or more modules (not shown in the figure), and each module can include a series of instruction operations in the detection and maintenance processing terminal.

[0100] The detection and maintenance processing terminal can also include one or more power supplies, one or more wired or wireless network interfaces, one or more input and output interfaces, one or more keyboards, and / or one or more operating systems.

[0101] The detection and maintenance processing terminal can include a memory and one or more programs, wherein the one or more programs are stored in the memory and are configured to be executed by the one or more processors. The one or more programs include processing of the detection and maintenance processing terminal in the above-mentioned device detection and maintenance method based on the ultra-high-speed circuit breaker fast breaking device.

[0102] Those skilled in the art can understand that all or part of the steps of the above-mentioned embodiments can be completed by hardware, or can be instructed by programs to complete the related hardware, and the programs can be stored in a computer readable storage medium, such as a read-only memory.

[0103] The above are preferred embodiments of the present application, and are not intended to limit the protection scope of the present application, so: all equivalent changes made according to the structure, shape, principle of the present application should be covered within the protection scope of the present application.

[0104] Although the present application is disclosed as above, the protection scope of the present application is not limited to this. Those skilled in the art can make various changes and modifications without departing from the spirit and scope of the present application, and these changes and modifications will fall within the protection scope of the present application.

Claims

1. A device detection and maintenance method based on an ultra-high-speed circuit breaker rapid breaking device, characterized in that: The method comprises: Sending experimental detection instructions to the AC power simulation device; Receive in real time the energy storage branch current fed back by the first current transformer, the main branch current fed back by the second current transformer, and the energy storage capacitor voltage at both ends of the zero-crossing energy storage capacitor fed back by the voltage transformer; Calculating and generating the energy storage capacitor capacity according to the multiple energy storage branch currents and the multiple energy storage capacitor voltages; An estimated service life of the zero-crossing energy storage capacitor is calculated based on the energy storage capacitor capacity and a preset aging capacitor capacity threshold.

2. The method according to claim 1, characterized in that The calculating and generating the energy storage capacitor capacity according to the plurality of energy storage branch currents and the plurality of energy storage capacitor voltages comprises: Among the multiple energy storage capacitor voltages, capturing the initial energy storage voltage and the discharge termination voltage of the zero-crossing energy storage capacitor, and calculating and generating the energy storage voltage difference; The energy storage capacitor capacity is calculated and generated according to the multiple energy storage branch currents, the times corresponding to the multiple energy storage branch currents, and the energy storage voltage difference.

3. The method according to claim 2, characterized in that A reference energy storage unit is connected in parallel to the zero-crossing energy storage unit in the ultra-high-speed circuit breaker fast-breaking device, wherein the reference energy storage unit includes a reference energy storage capacitor group and a second vacuum trigger switch connected in series; After the experimental detection instruction is sent to the AC power simulation device, the method further includes: Obtaining a frequency of change in a test current at an end of the modulated inductor away from the first vacuum triggered switch; After calculating and generating the energy storage capacitor capacity according to the plurality of energy storage branch currents and the plurality of energy storage capacitor voltages, the method further includes: Adjusting the reference capacitance capacity of the reference energy storage capacitor group according to the energy storage capacitor capacity; Sending a control detection instruction to the AC power supply simulation device, and sending a closing instruction to the second vacuum trigger switch after detecting the fault current; Obtaining a reference current variation frequency of the modulated inductor away from an end of the second vacuum triggered switch, and generating a capacitance estimation error value based on the reference current variation frequency and the test current variation frequency; The energy storage capacitor capacity is updated according to the reference capacitor capacity and the capacitance estimation error value.

4. The method according to claim 3, characterized in that Generating a capacitance estimation error value according to the control current change frequency and the test current change frequency includes: Calculating and generating a first estimated capacity according to the test current variation frequency and a pre-stored inductive reactance value of the modulation inductor; Calculating and generating a second estimated capacity according to the reference current variation frequency and the inductive reactance value of the modulation inductor; A capacitance estimation error value is calculated and generated according to a difference between the second estimated capacity and the first estimated capacity.

5. The method according to claim 4, characterized in that The updating of the energy storage capacitor capacity according to the comparison capacitor capacity and the capacitance estimation error value includes: If the capacitance estimation error value is greater than a preset capacitance calculation error threshold, calculating and generating a reference adjustment capacitance capacity according to the capacitance estimation error value and the reference capacitance capacity, and updating the energy storage capacitance capacity according to the reference adjustment capacitance capacity; If the capacitance estimation error value is less than or equal to the capacitance calculation error threshold, the energy storage capacitor capacity is updated according to the comparison capacitor capacity.

6. The method according to claim 4, characterized in that The calculating and generating the estimated service life of the zero-crossing energy storage capacitor according to the energy storage capacitor capacity and the preset aging capacitor capacity threshold comprises: Get the current ambient temperature of the ultra-high-speed circuit breaker fast-breaking device; generating a current temperature influence coefficient according to preset ambient temperature influence data and the current ambient temperature, wherein the ambient temperature influence data includes a plurality of temperature influence coefficients and a plurality of corresponding temperature values; Calculating and generating a current differentiated exclusion capacitance capacity according to the energy storage capacitance and the current temperature influence coefficient; An estimated service life is calculated based on pre-stored capacitor aging curve data, the aging capacitor capacity threshold, and the current differentiated exclusion capacitor capacity.

7. The method according to claim 6, characterized in that The calculating and generating the estimated service life according to the pre-stored capacitor aging curve data, the aging capacitor capacity threshold, and the current differentiated exclusion capacitor capacity includes: Acquire historical ambient temperature information of the working environment of the ultra-high-speed circuit breaker rapid-opening device, and filter out historical peak ambient temperatures from the historical ambient temperature information; generating a peak temperature impact coefficient according to the historical peak ambient temperature and the ambient temperature impact data; Calculating and generating a peak differential exclusion capacitance capacity according to the peak temperature influence coefficient and the aging capacitance threshold; An estimated service life is generated according to the current differentiated exclusion capacitance, the peak differentiated exclusion capacitance, and the capacitance aging curve data.

8. A device detection and maintenance system based on an ultra-high-speed circuit breaker rapid opening device, characterized in that: The system includes an AC power supply simulation device and a detection and maintenance processing terminal, wherein the detection and maintenance processing terminal includes: A control instruction sending module is used to send experimental detection instructions to the AC power simulation device; An information receiving module is used to receive in real time the energy storage branch current fed back by the first current transformer, the main branch current fed back by the second current transformer, and the energy storage capacitor voltage at both ends of the zero-crossing energy storage capacitor fed back by the voltage transformer; a capacitance value calculation processing module, configured to calculate and generate the energy storage capacitor capacity based on the plurality of energy storage branch currents and the plurality of energy storage capacitor voltages; The capacitor life estimation module is used to calculate and generate the estimated service life of the zero-crossing energy storage capacitor based on the energy storage capacitor capacity and a preset aging capacitor capacity threshold.

9. A detection, maintenance and processing terminal, characterized in that: The detection and maintenance processing terminal includes a processor and a memory, wherein the memory stores at least one instruction, at least one program, a code set, or an instruction set, and the at least one instruction, the at least one program, the code set, or the instruction set is loaded and executed by the processor to implement the device detection and maintenance method based on the ultra-high-speed circuit breaker fast-breaking device as described in any one of claims 1 to 7.

10. A computer-readable storage medium, characterized in that The storage medium stores at least one instruction, at least one program, a code set, or an instruction set, and the at least one instruction, the at least one program, the code set, or the instruction set is loaded and executed by the processor to implement the device detection and maintenance method based on the ultra-high-speed circuit breaker fast-breaking device as described in any one of claims 1 to 7.

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