Opening moment adjusting method based on rapid breaking device of ultra-high-speed circuit breaker

Abstract

The invention provides an opening moment adjusting method based on 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: obtaining a main current value fed back by a first current transformer in real time, and after a fault main current value corresponding to a short-circuit fault is detected in the main current value, adjusting the opening moment of the rapid breaking device of the ultra-high-speed circuit breaker; acquiring the zero-crossing oscillation current frequency of the end part of the modulation inductor; according to the zero-crossing oscillation current frequency and an inductive reactance value of a pre-stored modulation inductor, calculating and generating an energy storage capacitance value of a zero-crossing energy storage capacitor; according to the energy storage capacitance value and the inductive reactance value of the modulation inductor, an estimated peak resistance current is generated; generating fault current change data according to the main current value and a fault main current value corresponding to the detected short-circuit fault in the main current value; generating an opening current screening area according to the fault current change data and the estimated peak resistance current; and according to the opening current screening area, generating opening moment adjustment data of the ultra-high-speed circuit breaker.

Description

Technical Field

[0001] This invention relates to the field of circuit breaker technology, and more specifically, to a method for adjusting the opening time of a fast-breaking device based on an ultra-high-speed circuit breaker. Background Technology

[0002] With continuous economic development and the rapid increase in enterprise electricity load, various power supply equipment is also being steadily upgraded to improve power supply safety and stability. When a short-circuit fault occurs due to complex power supply conditions, ultra-high-speed circuit breakers can quickly disconnect the faulty circuit, reducing the impact of the fault on the power supply system.

[0003] In related technologies, there exists an ultra-high-speed circuit breaker breaking device such as Figure 1 As shown, the system includes an ultra-high-speed circuit breaker and an artificial zero-crossing branch connected in parallel to the circuit breaker. The artificial zero-crossing branch includes a zero-crossing energy storage capacitor, a vacuum trigger switch, and a modulation inductor connected in series. The zero-crossing energy storage unit, composed of the zero-crossing energy storage capacitor and the vacuum trigger switch, is further connected in parallel with a zinc oxide resistor. Simultaneously, a first current transformer is installed on the branch containing the ultra-high-speed circuit breaker, and a second current transformer is installed on the artificial zero-crossing branch. A voltage transformer is also installed across the zero-crossing energy storage capacitor. When a short-circuit fault is detected in the system, the vacuum trigger switch is closed. Under the combined action of the zero-crossing energy storage capacitor and the modulation inductor, a reverse current is superimposed on the ultra-high-speed circuit breaker, thereby creating an artificial zero-crossing point on the circuit breaker.

[0004] Regarding the aforementioned technologies, the applicant believes that the following problems exist: During long-term operation of the ultra-high-speed circuit breaker, the capacity of the zero-crossing energy storage capacitor may change due to factors such as aging, which may make it difficult for the zero-crossing energy storage capacitor to meet the reverse current required for the tripping of the ultra-high-speed circuit breaker. Summary of the Invention

[0005] In order to create an artificial zero-crossing point on an ultra-high-speed circuit breaker, this application provides a method for adjusting the opening time based on the fast breaking device of an ultra-high-speed circuit breaker.

[0006] Firstly, this application provides a method for adjusting the opening time of a fast-breaking device based on an ultra-high-speed circuit breaker, employing the following technical solution:

[0007] A method for adjusting the tripping time based on a fast-breaking device of an ultra-high-speed circuit breaker, the method comprising:

[0008] The main current value fed back by the first current transformer is obtained in real time, and the zero-crossing oscillation current frequency at the modulation inductor end is obtained after detecting the fault main current value corresponding to the short circuit fault in the main current value.

[0009] The energy storage capacity of the generated zero-crossing energy storage capacitor is calculated based on the zero-crossing oscillation current frequency and the inductive reactance of the pre-stored modulation inductor.

[0010] Based on the energy storage capacity and the inductive reactance of the modulation inductor, an estimated peak resistive current is generated;

[0011] Based on the main trunk current value and the fault main trunk current value corresponding to the detected short-circuit fault in the main trunk current value, fault current change data is generated;

[0012] Based on the fault current change data and the estimated peak resistance current, a tripping current screening area is generated;

[0013] Based on the tripping current screening region, the tripping time adjustment data of the ultra-high speed circuit breaker is generated.

[0014] Optionally, the formula for generating the zero-crossing energy storage capacitor's energy storage capacity is as follows:

[0015]

[0016] Where f is the zero-crossing oscillation current frequency, C is the energy storage capacity, and L is the inductive reactance of the modulation inductor.

[0017] Optionally, generating the estimated peak resistive current based on the energy storage capacity and the inductive reactance of the modulation inductor includes:

[0018] Obtain the current energy storage voltage and rated energy storage voltage of the zero-crossing energy storage capacitor;

[0019] The theoretical peak discharge current is calculated based on the current energy storage voltage and the energy storage capacity.

[0020] Based on the actual discharge peak value and the theoretical discharge current peak value monitored at the end of the adjusted inductor, an estimated error current value is calculated and generated.

[0021] The estimated peak resistance current is calculated based on the rated energy storage voltage, the energy storage capacity, and the estimated error current value.

[0022] Optionally, generating the tripping current screening region based on the fault current change data and the estimated peak withstand current includes:

[0023] Based on the estimated peak resistance current and the preset reserved estimated difference current value, the estimated resistance current is calculated and generated.

[0024] Based on the estimated resistance current, a tripping current screening region is defined within the variation period of the fault current change data.

[0025] Optionally, generating the tripping time adjustment data of the ultra-high-speed circuit breaker based on the tripping current screening region includes:

[0026] Based on the tripping current screening area, the proportion of the tripping area in the fault current change data change cycle is generated;

[0027] If the occupancy ratio of the tripping area is equal to 1, then the fault current change data change period includes the tripping time adjustment data in the full time domain.

[0028] If the proportion of the tripping area is less than 1 and greater than the preset tripping proportion threshold, then tripping time adjustment data carrying the tripping current screening area is generated.

[0029] If the proportion of the tripping area is less than or equal to the tripping proportion threshold, then tripping time adjustment data carrying an emergency supplementary adjustment flag is generated.

[0030] Optionally, the ultra-high speed circuit breaker fast breaking device also includes a redundant energy storage unit connected in parallel with the zero-crossing energy storage capacitor. The redundant energy storage unit includes a redundant energy storage capacitor and a switching transistor connected in series.

[0031] If the occupancy ratio of the tripping area is less than or equal to the tripping ratio threshold, after generating the tripping time adjustment data carrying an emergency supplementary adjustment flag, the method further includes:

[0032] Based on the redundant capacitance value and the energy storage value of the redundant energy storage capacitor, the comprehensive capacitance value is calculated and generated.

[0033] The comprehensive peak current is calculated based on the comprehensive capacitance value and the rated energy storage voltage.

[0034] The tripping time adjustment data is updated based on the combined peak current.

[0035] Secondly, this application provides a tripping timing adjustment system based on a fast-breaking device for ultra-high-speed circuit breakers, employing the following technical solution:

[0036] A tripping timing adjustment system based on a fast-breaking device for an ultra-high-speed circuit breaker, the system including a tripping control and adjustment terminal, the tripping control and adjustment terminal including:

[0037] The information acquisition module is used to acquire the main current value fed back by the first current transformer in real time, and after detecting the fault main current value corresponding to the short circuit fault in the main current value, acquire the zero-crossing oscillation current frequency at the modulation inductor end.

[0038] The calculation and processing module is used to calculate and generate the energy storage capacity of the zero-crossing energy storage capacitor based on the zero-crossing oscillation current frequency and the inductive reactance value of the pre-stored modulation inductor.

[0039] The calculation and processing module is used to generate an estimated peak resistive current based on the energy storage capacity and the inductive reactance of the modulation inductor.

[0040] The data graph construction module is used to generate fault current change data based on the main trunk current value and the fault main trunk current value corresponding to the detected short-circuit fault in the main trunk current value.

[0041] The region division processing module is used to generate a tripping current screening region based on the fault current change data and the estimated peak resistance current.

[0042] The region division processing module is used to filter regions based on the tripping current and generate tripping time adjustment data for the ultra-high-speed circuit breaker.

[0043] Thirdly, this application provides a tripping control and regulating terminal, which adopts the following technical solution:

[0044] A tripping control and adjustment terminal includes a processor and a memory. The memory stores at least one instruction, at least one program, a code set, or an instruction set. 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 tripping timing adjustment method based on the ultra-high-speed circuit breaker fast-breaking device as described in the first aspect.

[0045] Fourthly, this application provides a computer-readable storage medium, which adopts the following technical solution:

[0046] A computer-readable storage medium storing at least one instruction, at least one program, code set, or instruction set, wherein the at least one instruction, the at least one program, the code set, or the instruction set is loaded and executed by a processor to implement the method for adjusting the opening time of a fast-breaking device based on an ultra-high-speed circuit breaker as described in the first aspect.

[0047] In summary, this application includes at least one of the following beneficial technical effects:

[0048] 1. In this application, the zero-crossing oscillation current frequency is first monitored to calculate the current energy storage capacity of the zero-crossing energy storage capacitor. Then, the estimated peak resist current that can be generated is calculated based on the energy storage capacity value, so as to determine the maximum current that the zero-crossing energy storage capacitor can offset in the ultra-high speed circuit breaker. Next, the tripping current screening area is selected based on the estimated peak resist current to determine the artificial zero-crossing area that can be created on the ultra-high speed circuit breaker under the cooperation of the current zero-crossing energy storage capacitor and the modulation inductor. Then, the tripping time adjustment data is integrated through the tripping current screening area so that the reverse current required for the tripping of the ultra-high speed circuit breaker can be met by the zero-crossing energy storage capacitor within a specific time period.

[0049] 2. By calculating the estimated peak resist current, we can eliminate calculation errors caused by environmental and estimation effects. On the other hand, it is convenient to calculate the maximum oscillating current that the zero-crossing energy storage capacitor can generate under the condition of increased voltage, so as to resist the fault current flowing through the ultra-high speed circuit breaker. Attached Figure Description

[0050] To more clearly illustrate the technical solutions in the embodiments of the present invention, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0051] Figure 1 This is a circuit diagram of an ultra-high-speed circuit breaker breaking device in related technologies.

[0052] Figure 2 This is a circuit diagram of an ultra-high-speed circuit breaker breaking device provided in this application.

[0053] Figure 3 This is a flowchart illustrating a method for adjusting the opening time of a fast-breaking device based on an ultra-high-speed circuit breaker, as provided in an embodiment of this application.

[0054] Figure 4 This is a schematic diagram of a process for updating the tripping time adjustment data provided in an embodiment of this application. Detailed Implementation

[0055] To make the objectives, technical solutions, and advantages of this invention clearer, the following will be described in conjunction with the appendix. Figure 1-4 The embodiments of the present invention will be described in further detail below.

[0056] This application provides a method for adjusting the opening time of a fast-breaking device based on an ultra-high-speed circuit breaker. This method can be applied to a system for adjusting the opening time of a fast-breaking device based on an ultra-high-speed circuit breaker. The circuit diagram of the fast-breaking device in this application is shown below. Figure 2 As shown, the tripping timing adjustment system based on the ultra-high speed circuit breaker fast tripping device can be composed of a tripping control adjustment terminal, a first current transformer, a second current transformer, a voltage transformer, and the ultra-high speed circuit breaker fast tripping device. The main body executing this method can be the tripping control adjustment terminal in the tripping timing adjustment system based on the ultra-high speed circuit breaker fast tripping device, and is assisted by the first current transformer, the second current transformer, and the voltage transformer.

[0057] This application takes the creation of a zero-crossing point on an ultra-high-speed circuit breaker in a fast-breaking device for ultra-high-speed circuit breakers as an example. Other cases, such as the creation of a zero-crossing point on a fast circuit breaker in an artificial zero-crossing current limiting device, are similar and will not be described in detail.

[0058] The following will describe the specific implementation methods. Figure 3 The processing flow shown is explained in detail below:

[0059] Step S101: Obtain the main current value fed back by the first current transformer in real time, and after detecting the fault main current value corresponding to the short circuit fault in the main current value, obtain the zero-crossing oscillation current frequency at the modulation inductor end.

[0060] In implementation, the tripping control and regulating terminal receives the current value fed back from the first current transformer on the branch where the ultra-high-speed circuit breaker is located; this is referred to as the main current value. When the main current value fed back by the first current transformer by the tripping control and regulating terminal matches the current value corresponding to the short-circuit fault, the tripping control and regulating terminal then obtains the zero-crossing oscillation current frequency at the modulation inductor end in real time through an oscilloscope or CT current transformer, etc. Here, the main current value corresponding to the short-circuit fault is referred to as the fault main current value.

[0061] The detected main current value can be either an actual occurrence or a simulation by a generator, and is used to test and verify the method for adjusting the opening time of the fast-breaking device based on the ultra-high-speed circuit breaker.

[0062] Step S102: Calculate the energy storage capacity of the generated zero-crossing energy storage capacitor based on the zero-crossing oscillation current frequency and the inductive reactance of the pre-stored modulation inductor.

[0063] In implementation, the trip control regulating terminal uses the zero-crossing oscillation current frequency to solve for the energy storage capacity of the zero-crossing energy storage capacitor. The specific formula for calculating the energy storage capacity of the zero-crossing energy storage capacitor is as follows:

[0064]

[0065] Where f is the zero-crossing oscillation current frequency, C is the energy storage capacity, and L is the inductive reactance of the modulation inductor.

[0066] Step S103: Generate the estimated peak resistive current based on the energy storage capacity and the inductive reactance of the modulation inductor.

[0067] In practice, the trip control regulating terminal uses the energy storage capacity value and the inductive reactance value of the modulation inductor to solve for the peak discharge current of the zero-crossing energy storage capacitor under different voltages.

[0068] The relationship between the peak discharge current at the modulation inductor, the energy storage capacity of the zero-crossing energy storage capacitor, and the voltage across the zero-crossing energy storage capacitor can be expressed by the following formula:

[0069]

[0070] Where U is the voltage across the zero-crossing energy storage capacitor, such as the current energy storage voltage or the rated energy storage voltage across the zero-crossing energy storage capacitor, and I is the peak discharge current under different voltages, such as the theoretical peak discharge current corresponding to the current energy storage voltage, or the rated peak discharge current corresponding to the rated energy storage voltage.

[0071] Specifically, in step S103, the following processing steps also exist, and the operation flow is as follows:

[0072] Obtain the current energy storage voltage and rated energy storage voltage of the zero-crossing energy storage capacitor;

[0073] Based on the current energy storage voltage and energy storage capacity, the theoretical peak discharge current is calculated and generated.

[0074] Based on the actual discharge peak value and the theoretical discharge current peak value monitored at the end of the inductor, the estimated error current value is calculated and generated.

[0075] Based on the rated energy storage voltage, energy storage capacity, and estimated error current value, the estimated peak resistance current is calculated and generated.

[0076] In practice, the trip control regulating terminal obtains the voltage value across the zero-crossing energy storage capacitor before the fault occurred at the current moment through a voltage transformer, and calls it the current energy storage voltage. It also obtains the rated energy storage voltage of the zero-crossing energy storage capacitor.

[0077] Next, the trip control adjustment terminal calculates the corresponding peak discharge current using the above formula, combined with the current energy storage voltage, the inductive reactance of the modulation inductor, and the energy storage capacity of the zero-crossing energy storage voltage. This is referred to as the theoretical peak discharge current.

[0078] Then, the trip control adjustment terminal subtracts the theoretical discharge current peak value from the actual discharge peak value monitored at the end of the adjustment inductor, and calculates and generates an estimated error current value.

[0079] Next, the trip control adjustment terminal uses the above formula, combined with the current energy storage voltage, the inductive reactance of the modulation inductor, and the rated energy storage voltage of the zero-crossing energy storage voltage, to calculate the corresponding peak discharge current, which is referred to here as the rated peak discharge current.

[0080] Furthermore, the trip control adjustment terminal superimposes the rated discharge current peak value and the estimated error current value to calculate and generate the estimated peak resistance current.

[0081] In this application, by calculating the estimated peak resisting current, we can eliminate calculation errors caused by environmental and estimation effects. On the other hand, it is convenient to calculate the maximum oscillating current that the zero-crossing energy storage capacitor can generate under the condition of increased voltage, so as to resist the fault current flowing through the ultra-high speed circuit breaker.

[0082] Step S104: Generate fault current change data based on the main trunk current value and the fault main trunk current value corresponding to the detected short-circuit fault in the main trunk current value.

[0083] In implementation, the tripping control and regulating terminal uses the main current value fed back by the first current transformer to obtain the frequency of current change flowing through the ultra-high-speed circuit breaker. In addition, the tripping control and regulating terminal detects the fault main current value corresponding to the short-circuit fault from the main current value fed back by the first current transformer, and constructs fault current change data in which the fault current changes periodically with the frequency of current change.

[0084] Step S105: Generate the tripping current screening area based on the fault current change data and the estimated peak resistance current.

[0085] In practice, the tripping control adjustment terminal estimates the peak resistance current and divides the tripping current screening area from any current change cycle of the fault current change data.

[0086] Specifically, in step S105, the following processing steps also exist, and the operation flow is as follows:

[0087] The estimated resistance current is calculated based on the estimated peak resistance current and the preset reserved estimated difference current value.

[0088] Based on the estimated resistance current, the tripping current screening area is divided into different periods within the fault current variation data.

[0089] In practice, since the fault current in the fault current change data changes periodically, the trip control adjustment terminal will be explained using the fault main current value under any cycle as an example.

[0090] The tripping control regulating terminal first subtracts the reserved estimated difference current value from the estimated peak blocking current to generate the estimated blocking current, so as to eliminate the estimation influence of environmental differences on the peak current.

[0091] The estimated blocking current is compared with the fault trunk current value over a whole cycle, so as to divide the area where the fault trunk current value is less than the estimated blocking current within a cycle, and thus to divide the tripping current screening area in the changing cycle of fault current data.

[0092] Step S106: Based on the tripping current screening area, generate tripping time adjustment data for the ultra-high speed circuit breaker.

[0093] In practice, the tripping regulation control terminal uses the tripping current screening area to adjust the tripping time of the ultra-high speed circuit breaker and generates corresponding tripping time adjustment data.

[0094] Specifically, in step S106, the following processing steps also exist, and the operation flow is as follows:

[0095] Based on the tripping current screening area, the proportion of the tripping area in the fault current change data change cycle is generated.

[0096] If the occupancy ratio of the tripping area is equal to 1, then the fault current change data change period will include the tripping time adjustment data in the entire time domain.

[0097] If the proportion of the tripping area is less than 1 and greater than the preset tripping proportion threshold, then tripping time adjustment data carrying the tripping current screening area will be generated.

[0098] If the proportion of the tripping area is less than or equal to the tripping proportion threshold, then tripping time adjustment data carrying emergency supplementary adjustments will be generated.

[0099] In implementation, the tripping control and regulation terminal uses the tripping current to filter the area and generates a tripping area occupancy ratio based on the proportion occupied within a change cycle. Then, the tripping control and regulation terminal compares the tripping area occupancy ratio with 1 and a tripping proportion threshold, respectively. The comparison result must have at least one of the following three possible outcomes:

[0100] Case 1: If the occupancy ratio of the tripping area is equal to 1, then the fault current change data change period will include the tripping time adjustment data in the entire time domain.

[0101] Case 2: If the proportion of the tripping area is less than 1 and greater than the preset tripping proportion threshold, then tripping time adjustment data carrying the tripping current screening area will be generated.

[0102] Scenario 3: If the proportion of the tripping area is less than or equal to the tripping proportion threshold, then tripping time adjustment data with an emergency supplementary adjustment flag will be generated.

[0103] In this application, the zero-crossing oscillation current frequency is first monitored, and the energy storage capacity of the current zero-crossing energy storage capacitor is calculated. Then, the estimated peak resistive current generated by the energy storage capacity and the rated energy storage voltage of the zero-crossing energy storage capacitor is calculated, thereby determining the maximum current that the zero-crossing energy storage capacitor can offset in the ultra-high-speed circuit breaker. Next, the estimated peak resistive current is used to filter out the tripping current filtering region, in order to determine the artificial zero-crossing region that can be created on the ultra-high-speed circuit breaker under the current cooperation of the zero-crossing energy storage capacitor and the modulation inductor. Then, the tripping time adjustment data is integrated through the tripping current filtering region, so that the zero-crossing energy storage capacitor can meet the reverse current required for tripping of the ultra-high-speed circuit breaker within a specific time period.

[0104] Optionally, the ultra-high speed circuit breaker fast breaking device also includes a redundant energy storage unit connected in parallel with the zero-crossing energy storage capacitor. The redundant energy storage unit includes a redundant energy storage capacitor and a switching transistor connected in series.

[0105] After step S106, there are still cases such as Figure 4 The processing steps shown are as follows:

[0106] Step S201: Calculate and generate the comprehensive capacitance value of the redundant energy storage capacitor based on the redundant capacitance value and the energy storage capacitance value of the redundant energy storage capacitor.

[0107] In practice, the trip control and regulation terminal superimposes the capacitance value of the redundant energy storage capacitor and the energy storage capacitance value to calculate the comprehensive capacitance value.

[0108] Step S202: Calculate and generate the comprehensive peak current based on the comprehensive capacitance value and the rated energy storage voltage.

[0109] In practice, the trip control and regulation terminal calculates the comprehensive peak current using the above formula, combined with the comprehensive capacitance value, rated energy storage voltage, and inductive reactance value of the modulation inductor.

[0110] Step S203: Update the tripping time adjustment data based on the comprehensive peak current.

[0111] In practice, the tripping control adjustment terminal adds the comprehensive peak current and the estimated error current to calculate the comprehensive peak resistance current. Then, the tripping current screening area is redefined based on the comprehensive peak resistance current, and the tripping time adjustment data is updated based on the redefined tripping current screening area.

[0112] In this application, redundant energy storage capacitors are used to temporarily compensate for the problem of low capacitance value of zero-crossing energy storage capacitors. In addition, after supplementing redundant energy storage capacitors, the data adjustment at the tripping time is updated to increase the timeliness of the data.

[0113] Furthermore, when it is necessary to put the redundant energy storage capacitor into use, and after the trip control adjustment terminal detects again that the main current is the current value of the short-circuit fault, the following processing can also be performed in this application, and the operation process is as follows:

[0114] The redundant energy storage voltage across the redundant energy storage capacitor and the zero-crossing energy storage voltage across the zero-crossing energy storage capacitor are acquired in real time.

[0115] The duty cycle of the control signal for switching the control transistor is adjusted based on the redundant energy storage voltage value and the zero-crossing energy storage voltage value.

[0116] During implementation, the trip control adjustment terminal acquires the voltage value across the redundant energy storage capacitor in real time, which is referred to here as the redundant energy storage voltage value. At the same time, it acquires the voltage value across the zero-crossing energy storage capacitor in real time, which is referred to here as the zero-crossing energy storage voltage value.

[0117] Next, the redundant energy storage voltage value and the zero-crossing energy storage voltage value are compared at the trip control adjustment terminal:

[0118] When the redundant energy storage voltage value is greater than the zero-crossing energy storage voltage value, the duty cycle of the control signal of the control switch is increased by adjusting the gradient growth coefficient according to the preset duty cycle. Here, the gradient growth coefficient can be 1%, 5%, etc.

[0119] When the redundant energy storage voltage is less than the zero-crossing energy storage voltage, the duty cycle of the control signal of the control switch is reduced by adjusting the gradient growth coefficient with a preset duty cycle.

[0120] When the redundant energy storage voltage value is equal to the zero-crossing energy storage voltage value, the current control signal duty cycle is not adjusted.

[0121] It should be noted that in this application, the switching transistor is controlled by a high-frequency PWM wave, and the duty cycle is controlled by adjusting the signal to reduce the voltage difference that may occur between the zero-crossing energy storage capacitor and the redundant energy storage capacitor.

[0122] This application also discloses a tripping timing adjustment system based on a fast-breaking device for an ultra-high-speed circuit breaker. The system includes a tripping control and adjustment terminal, which includes:

[0123] The information acquisition module is used to acquire the main current value fed back by the first current transformer in real time, and after detecting the fault main current value corresponding to the short circuit fault in the main current value, acquire the zero-crossing oscillation current frequency at the modulation inductor end.

[0124] The calculation and processing module is used to calculate the energy storage capacity of the zero-crossing energy storage capacitor based on the zero-crossing oscillation current frequency and the inductive reactance value of the pre-stored modulation inductor.

[0125] The calculation and processing module is used to generate the estimated peak resistive current based on the energy storage capacity and the inductive reactance of the modulation inductor.

[0126] The data graph construction module is used to generate fault current change data based on the main trunk current value and the fault main trunk current value corresponding to the detected short-circuit fault in the main trunk current value.

[0127] The area division processing module is used to generate tripping current screening areas based on fault current change data and estimated peak resistance current.

[0128] The region segmentation processing module is used to filter regions based on the tripping current and generate tripping time adjustment data for ultra-high speed circuit breakers.

[0129] Optional, the trip control regulating terminal, specifically used for:

[0130] The information acquisition module is used to acquire the current energy storage voltage and rated energy storage voltage of the zero-crossing energy storage capacitor;

[0131] The calculation and processing module is used to calculate and generate the theoretical peak discharge current based on the current energy storage voltage and energy storage capacity.

[0132] The calculation and processing module is used to calculate and generate an estimated error current value based on the actual discharge peak value and the theoretical discharge current peak value monitored at the end of the inductor.

[0133] The calculation and processing module is used to calculate and generate the estimated peak resistive current based on the rated energy storage voltage, energy storage capacity, and estimated error current value.

[0134] Optional, the trip control regulating terminal, specifically used for:

[0135] The calculation and processing module is used to calculate and generate the estimated resistance current based on the estimated peak resistance current and the preset reserved estimated difference current value.

[0136] The region division processing module is used to divide the tripping current screening region into different periods based on the estimated resistive current and the change period of the fault current change data.

[0137] Optional, the trip control regulating terminal, specifically used for:

[0138] The calculation and processing module is used to filter regions based on the tripping current and generate the proportion of tripping regions in the fault current change data cycle.

[0139] The area division processing module generates fault current change data with the tripping time adjustment data in the entire time domain if the occupancy ratio of the tripping area is equal to 1.

[0140] If the proportion of the tripping area is less than 1 and greater than the preset tripping proportion threshold, the area division processing module generates tripping time adjustment data carrying the tripping current screening area.

[0141] If the proportion of the tripping area is less than or equal to the tripping proportion threshold, the area division processing module generates tripping time adjustment data carrying an emergency supplementary adjustment flag.

[0142] Optionally, the trip control regulating terminal can also be used for:

[0143] The calculation and processing module is used to calculate and generate the comprehensive capacitance value of the redundant energy storage capacitor based on the redundant capacitance value and the energy storage capacitance value of the redundant energy storage capacitor.

[0144] The calculation and processing module is used to calculate and generate the comprehensive peak current based on the comprehensive capacitance value and the rated energy storage voltage;

[0145] The region division processing module is used to update the tripping time adjustment data based on the comprehensive peak current.

[0146] This application provides a circuit breaker control and regulation terminal. This terminal can vary significantly depending on its configuration or performance, and may include one or more central processing units (e.g., one or more processors) and memory, and one or more storage media (e.g., one or more mass storage devices) for storing application programs or data. The memory and storage media can be short-term or long-term storage. The program stored in the storage media may include one or more modules (not shown in the figures), and each module may include a series of instruction operations on the circuit breaker control and regulation terminal.

[0147] The trip control and regulation terminal may also include one or more power supplies, one or more wired or wireless network interfaces, one or more input / output interfaces, one or more keyboards, and / or one or more operating systems.

[0148] The tripping control adjustment terminal may include a memory and one or more programs, wherein one or more programs are stored in the memory and configured to be executed by one or more processors. One or more programs include a tripping timing adjustment method for performing the above-mentioned tripping timing adjustment method based on the ultra-high speed circuit breaker fast tripping device.

[0149] Those skilled in the art will understand that all or part of the steps of the above embodiments can be implemented by hardware or by a program instructing related hardware. The program can be stored in a computer-readable storage medium, such as a read-only memory.

[0150] The above are all preferred embodiments of this application, and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.

[0151] While the present invention has been disclosed above, its scope of protection is not limited thereto. Those skilled in the art can make various changes and modifications without departing from the spirit and scope of the present invention, and all such changes and modifications will fall within the scope of protection of the present invention.

Claims

1. A method for adjusting the opening time of a fast opening device based on an ultra-high speed circuit breaker, characterized in that, The method comprises: Real-time acquisition of the trunk current value fed back by the first current transformer, and after detecting the fault trunk current value corresponding to the short-circuit fault in the trunk current value, acquisition of the zero-crossing oscillation current frequency of the modulated inductor end; According to the zero-crossing oscillation current frequency and the inductance value of the pre-stored modulated inductor, the energy storage capacity of the zero-crossing energy storage capacitor is calculated; According to the energy storage capacity and the inductance value of the modulated inductor, the estimated peak resistance current is generated; According to the trunk current value and the fault trunk current value corresponding to the short-circuit fault in the trunk current value, the fault current change data is generated; According to the fault current change data and the estimated peak resistance current, the tripping current screening area is generated; According to the tripping current screening area, the tripping time adjustment data of the ultra-high-speed circuit breaker is generated.

2. The method of claim 1, wherein, The formula for calculating the energy storage capacity of the zero-crossing energy storage capacitor is as follows: Wherein, f is the zero-crossing oscillation current frequency, C is the energy storage capacity, and L is the inductance value of the modulated inductor.

3. The method of claim 2, wherein, The estimated peak resistance current is generated according to the energy storage capacity and the inductance value of the modulated inductor, comprising: Acquisition of the current energy storage voltage and the rated energy storage voltage of the zero-crossing energy storage capacitor; According to the current energy storage voltage and the energy storage capacity, the theoretical discharge current peak value is calculated and generated; According to the actual discharge peak value monitored by the adjustment inductor end and the theoretical discharge current peak value, the estimated error current value is calculated and generated; According to the rated energy storage voltage, the energy storage capacity and the estimated error current value, the estimated peak resistance current is calculated and generated.

4. The method of claim 1, wherein, The tripping current screening area is generated according to the fault current change data and the estimated peak resistance current, comprising: According to the estimated peak resistance current and the pre-set reserved estimated difference current value, the estimated resistance current is calculated and generated; According to the estimated resistance current, the tripping current screening area is divided in the change period of the fault current change data.

5. The method of claim 4, wherein, The tripping time adjustment data of the ultra-high-speed circuit breaker is generated according to the tripping current screening area, comprising: According to the tripping current screening area, the tripping area occupancy ratio in the change period of the fault current change data is generated; If the tripping area occupancy ratio is equal to 1, the tripping time adjustment data containing the full time domain in the change period of the fault current change data is generated; If the tripping area occupancy ratio is less than 1 and greater than the pre-set tripping occupancy threshold, the tripping time adjustment data carrying the tripping current screening area is generated; If the tripping area occupancy ratio is less than or equal to the tripping occupancy threshold, the tripping time adjustment data carrying the emergency supplementary adjustment identifier is generated.

6. The method of claim 5, wherein, The ultra-high-speed circuit breaker rapid opening device further comprises a redundant energy storage unit connected in parallel with the zero-crossing energy storage capacitor, and the redundant energy storage unit comprises a redundant energy storage capacitor and a switch tube connected in series. If the tripping area occupancy ratio is less than or equal to the tripping occupancy threshold, the tripping time adjustment data carrying the emergency supplementary adjustment identifier is generated, and further comprising: According to the redundant capacitor capacity of the redundant energy storage capacitor and the energy storage capacity, the capacitor comprehensive capacity is calculated and generated; According to the comprehensive peak current, the opening time of the super-high-speed circuit breaker is adjusted. According to the comprehensive peak current, the opening time of the super-high-speed circuit breaker is adjusted.

7. A system for adjusting the opening time of a fast opening device of an ultra-high speed circuit breaker, characterized in that, The system comprises an opening control terminal, and the opening control terminal comprises: The information acquisition module is configured to acquire a main current value fed back by a first current transformer in real time, and acquire a zero-crossing oscillation current frequency of a modulated inductor end after detecting a fault main current value corresponding to a short-circuit fault in the main current value. The calculation processing module is configured to calculate a storage capacity value of a zero-crossing storage capacitor according to the zero-crossing oscillation current frequency and a reactance value of the modulated inductor pre-stored. The calculation processing module is configured to generate a predicted peak resistance current according to the storage capacity value and the reactance value of the modulated inductor. The data graph construction module is configured to generate fault current change data according to the main current value and the fault main current value corresponding to the short-circuit fault in the main current value. The region division processing module is configured to generate an opening current screening region according to the fault current change data and the predicted peak resistance current. The region division processing module is configured to generate the opening time adjustment data of the super-high-speed circuit breaker according to the opening current screening region.

8. A closing control adjustment terminal, characterized by, The opening control terminal comprises a processor and a memory, and the memory stores at least one instruction, at least one program, a code set or an instruction set.

9. A computer-readable storage medium, characterized in that, The memory medium stores at least one instruction, at least one program, a code set or an instruction set, and the processor loads and executes the at least one instruction, the at least one program, the code set or the instruction set to implement the opening time adjustment method of the super-high-speed circuit breaker fast breaking device.

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