An energy storage device suitable for electromagnetic repulsion fast circuit breaker

Abstract

The present invention provides an energy storage device suitable for an electromagnetic repulsion fast circuit breaker, including an information monitoring module, a controller, an energy storage capacitor module and a fast switch, wherein the information monitoring module is used to monitor line information, capacitor operation information and position information of the fast switch; the energy storage capacitor module is provided with several groups of opening energy storage capacitors and closing energy storage capacitors, which are used to discharge the corresponding energy storage capacitors according to the control instructions of the controller, thereby controlling the opening and closing of the fast switch; the controller is used to rotate and judge the energy storage capacitors that meet the set conditions from several groups of energy storage capacitors according to the line information and operation information and issue corresponding discharge control instructions; and is also used to judge whether the fast switch has an opening and closing fault according to the position information. The present invention realizes multiple opening and closing operations of the electromagnetic repulsion fast circuit breaker in a short time by setting multiple groups of energy storage capacitors and rotating and judging the capacitors that meet the conditions according to their operation information.

Description

Technical Field

[0001] The invention belongs to the technical field of fast switches, and in particular relates to an energy storage device suitable for an electromagnetic repulsion fast circuit breaker. Background Art

[0002] With the continuous expansion of the capacity of the power system, the short-circuit current is generally more than ten times the rated current when a short circuit occurs in the system. There are problems such as insufficient breaking capacity of the load-side vacuum circuit breaker and insufficient design of the transformer's ability to resist short-circuit current impact, which seriously threaten the safe operation of the power system. To solve the above problems, there are currently two solutions. One is to use a high-impedance transformer to limit the system short-circuit current, which will cause active and reactive power losses and increase investment costs; the other is to use a zero-loss deep current limiting device, which can achieve the goal of zero loss and zero voltage drop, and has good economic and social benefits of energy saving and consumption reduction.

[0003] The fast switch in the zero-loss deep current limiting device controls the opening and closing of the circuit breaker by discharging the energy storage capacitor. After the opening and closing operation of the fast switch, the energy storage capacitor needs time to re-store energy. Before the energy storage is completed, the fast switch cannot be opened or closed. That is, the fast switch can only be opened or closed once in a short period of time, and cannot be opened or closed multiple times, which does not meet the needs of multiple opening and closing operations in a short period of time. Summary of the invention

[0004] In view of this, the present invention aims to solve the problem that the fast switch in the existing zero-loss deep current limiting device can only be opened and closed once in a short period of time, cannot be opened and closed multiple times, and cannot meet the needs of multiple opening and closing in a short period of time.

[0005] In order to solve the above technical problems, the present invention provides the following technical solutions:

[0006] The present invention provides an energy storage device suitable for an electromagnetic repulsion fast circuit breaker, comprising: an information monitoring module, a controller, an energy storage capacitor module and a fast switch;

[0007] The information monitoring module is used to monitor the line information, the operation information of the energy storage capacitor module and the position information of the fast switch and send them to the controller;

[0008] The energy storage capacitor module is provided with several groups of opening energy storage capacitors and closing energy storage capacitors, which are used to discharge the corresponding energy storage capacitors according to the control instructions of the controller, thereby controlling the opening and closing of the fast switch;

[0009] The controller is used to judge whether there is an energy storage capacitor that meets the set conditions from several groups of energy storage capacitors according to line information and operation information, and send corresponding discharge control instructions to the energy storage capacitors that meet the conditions; it is also used to judge whether the fast switch after the energy storage capacitor module is actuated has an opening and closing fault according to the position information.

[0010] Furthermore, the information monitoring module specifically includes: a fault current monitoring module, a capacitor voltage monitoring module, a capacitor discharge times counting module and a switch position monitoring module;

[0011] The fault current monitoring module is used to monitor the fault current of the line and transmit the detection data to the controller in real time;

[0012] The capacitor voltage monitoring module is used to monitor the voltage across each closing energy storage capacitor and opening energy storage capacitor in the energy storage capacitor module, and transmit the detection data to the controller in real time;

[0013] The capacitor discharge times counting module is used to monitor the discharge times of each closing energy storage capacitor and opening energy storage capacitor in the energy storage capacitor module, and transmit the detection data to the controller in real time;

[0014] The switch position monitoring module is used to monitor the opening and closing positions of the fast switch and transmit the detection data to the controller in real time.

[0015] Furthermore, the controller is provided with a fault current setting value, and judging whether there is an energy storage capacitor that meets the set conditions from a plurality of groups of energy storage capacitors in rotation according to the line information and the operation information specifically includes:

[0016] When the fault current is not less than the fault current setting value, it is judged whether there is a disconnecting energy storage capacitor that meets the set conditions from among several groups of disconnecting energy storage capacitors according to the operation information, so as to issue a discharge control instruction to the disconnecting energy storage capacitor that meets the conditions;

[0017] When the fault current is less than the fault current setting value, it is determined whether there is a closing energy storage capacitor that meets the set conditions from among several combined closing energy storage capacitors according to the operation information, so as to send a discharge control instruction to the closing energy storage capacitor that meets the conditions.

[0018] Furthermore, the controller is also provided with a capacitor voltage lockout value and a capacitor discharge count value within a set time, and the setting conditions are specifically:

[0019] The voltage across the energy storage capacitor is greater than the capacitor voltage lock value and the discharge times of the energy storage capacitor are less than the capacitor discharge times within the set time.

[0020] Furthermore, the capacitor switching timing of the plurality of groups of switching energy storage capacitors and closing energy storage capacitors when multiple faults occur in the line specifically includes:

[0021] When a transient fault occurs in the line, the energy storage capacitor that meets the set conditions for opening is discharged, the switch is opened quickly, and the current limiting device is put into operation. After a delay, the energy storage capacitor that meets the set conditions for closing is discharged, the switch is closed quickly, and the current limiting device is shut down. The switch is stored and the reclosing is charged to prepare for the next fault.

[0022] When a permanent fault occurs in the line, the opening energy storage capacitor that meets the set conditions is discharged, the rapid switch is opened, and the current limiting device is put into operation. After a delay, the closing energy storage capacitor that meets the set conditions is discharged, the rapid switch is closed, and the current limiting device is shut down. The reclosing operation is carried out, the line recloses to the fault, the opening energy storage capacitor that meets the set conditions is discharged, the rapid switch is opened, the current limiting device is put into operation, the faulty line is accelerated to trip, and after a delay, the closing energy storage capacitor that meets the set conditions is discharged, the rapid switch is closed, the current limiting device is shut down, and the switch energy storage and reclosing charging are carried out to prepare for the next fault.

[0023] Furthermore, the controller is also used for:

[0024] When several groups of energy storage capacitors do not meet the set conditions, the opening and closing of the fast switch is locked and a fault message is issued.

[0025] Furthermore, the controller is also used for:

[0026] Displays real-time current value, capacitor voltage value, capacitor discharge times and device fault information.

[0027] Furthermore, when the controller detects device failure information, the controller sends an alarm signal and uploads the alarm signal to the monitoring center.

[0028] In summary, the present invention provides an energy storage device suitable for an electromagnetic repulsion fast circuit breaker, including an information monitoring module, a controller, an energy storage capacitor module and a fast switch, wherein the information monitoring module is used to monitor line information, capacitor operation information and position information of the fast switch; the energy storage capacitor module is provided with several groups of opening energy storage capacitors and closing energy storage capacitors, which are used to discharge the corresponding energy storage capacitors according to the control instructions of the controller, thereby controlling the opening and closing of the fast switch; the controller is used to rotate and judge the energy storage capacitors that meet the set conditions from several groups of energy storage capacitors according to the line information and operation information and issue corresponding discharge control instructions; and is also used to judge whether the fast switch has an opening and closing fault according to the position information. The present invention realizes multiple opening and closing operations of the electromagnetic repulsion fast circuit breaker in a short time by setting multiple groups of energy storage capacitors and rotating and judging the capacitors that meet the conditions according to their operation information. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative labor.

[0030] Figure 1A structural block diagram of an energy storage device suitable for an electromagnetic repulsion fast circuit breaker provided in an embodiment of the present invention;

[0031] Figure 2 An operation flow chart of an energy storage device suitable for an electromagnetic repulsion fast circuit breaker provided in an embodiment of the present invention;

[0032] Figure 3 A timing diagram of capacitor insertion and withdrawal during multiple instantaneous faults provided by an embodiment of the present invention;

[0033] Figure 4 The present invention provides a timing diagram of capacitor switching on and off during transient faults and permanent faults. DETAILED DESCRIPTION

[0034] In order to make the purpose, features and advantages of the present invention more obvious and easy to understand, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the embodiments described below are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0035] With the continuous expansion of the capacity of the power system, the short-circuit current is generally more than ten times the rated current when a short circuit occurs in the system. There are problems such as insufficient breaking capacity of the load-side vacuum circuit breaker and insufficient design of the transformer's ability to resist short-circuit current impact, which seriously threaten the safe operation of the power system. To solve the above problems, there are currently two solutions. One is to use a high-impedance transformer to limit the system short-circuit current, which will cause active and reactive power losses and increase investment costs; the other is to use a zero-loss deep current limiting device, which can achieve the goal of zero loss and zero voltage drop, and has good economic and social benefits of energy saving and consumption reduction.

[0036] The fast switch in the zero-loss deep current limiting device controls the opening and closing of the circuit breaker by discharging the energy storage capacitor. After the opening and closing operation of the fast switch, the energy storage capacitor needs time to re-store energy. Before the energy storage is completed, the fast switch cannot be opened or closed. That is, the fast switch can only be opened or closed once in a short period of time, and cannot be opened or closed multiple times, which does not meet the needs of multiple opening and closing operations in a short period of time.

[0037] Based on this, the present invention provides an energy storage device suitable for an electromagnetic repulsion fast circuit breaker.

[0038] An embodiment of an energy storage device suitable for an electromagnetic repulsion fast circuit breaker of the present invention is described in detail below.

[0039] See also Figure 1This embodiment provides an energy storage device suitable for an electromagnetic repulsion fast circuit breaker, including an information monitoring module, a controller, an energy storage capacitor module and a fast switch.

[0040] In this embodiment, the information monitoring module is used to monitor the line information, the operation information of the energy storage capacitor module and the position information of the fast switch and send them to the controller.

[0041] Specifically, the information monitoring module includes a fault current monitoring module, a capacitor voltage monitoring module, a capacitor discharge times counting module and a switch position monitoring module. The specific settings of each module are as follows:

[0042] The fault current monitoring module is used to monitor the fault current of the line and transmit the detection data to the controller in real time;

[0043] The capacitor voltage monitoring module is used to monitor the voltage across each closing energy storage capacitor and opening energy storage capacitor in the energy storage capacitor module, and transmit the detection data to the controller in real time;

[0044] The capacitor discharge times counting module is used to monitor the discharge times of each closing energy storage capacitor and opening energy storage capacitor in the energy storage capacitor module, and transmit the detection data to the controller in real time;

[0045] The switch position monitoring module is used to monitor the opening and closing positions of the fast switch and transmit the detection data to the controller in real time.

[0046] In this embodiment, the energy storage capacitor module is provided with several groups of opening energy storage capacitors and closing energy storage capacitors, which are used to discharge the corresponding energy storage capacitors according to the control instructions of the controller, thereby controlling the opening and closing of the fast switch.

[0047] It should be noted that in the actual implementation process, from the perspective of economy and practicality, the energy storage capacitor module preferably sets three groups of gate energy storage capacitors C 11 , C 12 , C 13 And three-combination gate energy storage capacitor C 21 , C 22 , C 23 .

[0048] In this embodiment, the controller is used to determine whether there is an energy storage capacitor that meets the set conditions from among several groups of energy storage capacitors according to line information and operation information, and to issue corresponding discharge control instructions to the energy storage capacitors that meet the conditions; it is also used to determine whether the fast switch after the energy storage capacitor module is actuated has a fault of opening and closing according to the position information.

[0049] Specifically, the controller controls the discharge of the open energy storage capacitor or the closed energy storage capacitor according to the circuit fault situation. The specific judgment is as follows:

[0050] When the fault current is not less than the fault current setting value, it is judged whether there is a disconnection energy storage capacitor that meets the set conditions from several groups of disconnection energy storage capacitors according to the operation information, so as to send a discharge control instruction to the disconnection energy storage capacitor that meets the conditions. That is, when the line fault current is greater than or equal to the fault current setting value, the disconnection energy storage capacitor is discharged, and the disconnection coil is energized to control the fast switch disconnection.

[0051] When the fault current is less than the fault current setting value, it is judged whether there is a closing energy storage capacitor that meets the set conditions from a number of combined switch energy storage capacitors according to the operation information, so as to send a discharge control instruction to the closing energy storage capacitor that meets the conditions. That is, when the line fault current is less than the fault current setting value, the closing energy storage capacitor discharges, and the closing coil is energized to control the fast switch to close.

[0052] Furthermore, the controller is also provided with a capacitor voltage lock-in value and a capacitor discharge count value within a set time, and the setting conditions are specifically: the voltage across the energy storage capacitor is greater than the capacitor voltage lock-in value and the number of discharges of the energy storage capacitor is less than the capacitor discharge count value within the set time. That is, when the capacitor voltage monitoring value is less than the capacitor voltage lock-in value, the group of energy storage capacitors does not participate in the fast switch opening and closing control; when the capacitor discharge count value is greater than the capacitor discharge count value, the group of energy storage capacitors does not participate in the fast switch opening and closing control.

[0053] See also Figure 2 , the following uses the energy storage capacitor module to set up three groups of gate energy storage capacitors C 11 , C 12 , C 13 And three-combination gate energy storage capacitor C 21 , C 22 , C 23 Take as an example to illustrate the operation logic of the energy storage device of this embodiment.

[0054] Before the device is operated, the controller sets the fault current constant I s , capacitor voltage lock value U s 、N is the constant value of the number of capacitor discharges in a certain period of time s , where N s Does not change over time.

[0055] The fast switch opening control logic is that when the fault current is greater than the fault current setting value I s If the opening energy storage capacitor C 11 The voltage across the capacitor is greater than the capacitor voltage lock value U s , and the number of discharges is less than the fixed value N of the number of capacitor discharges in a certain period of time s When the gate is opened, the energy storage capacitor C 11 Discharge, thereby controlling the rapid switch opening; otherwise, when the opening energy storage capacitor C 12The voltage across the capacitor is greater than the capacitor voltage lock value U s , and the number of discharges is less than the fixed value N of the number of capacitor discharges in a certain period of time s When the gate is opened, the energy storage capacitor C 12 Discharge, thereby controlling the rapid switch opening; otherwise, when the opening energy storage capacitor C 13 The voltage across the capacitor is greater than the capacitor voltage lock value U s , and the number of discharges is less than the fixed value N of the number of capacitor discharges in a certain period of time s When the gate is opened, the energy storage capacitor C 13 Discharge, thereby controlling the rapid switch to open, otherwise a fault will be displayed in the background.

[0056] The fast switch closing control logic is the delay time t after the fast switch opens. s , when the closing energy storage capacitor C 21 The voltage across the capacitor is greater than the capacitor voltage lock value U s , and the number of discharges is less than the fixed value N of the number of capacitor discharges in a certain period of time s When the energy storage capacitor C is closed 21 Discharge, thereby controlling the fast switch closing; otherwise, when the closing energy storage capacitor C 22 The voltage across the capacitor is greater than the capacitor voltage lock value U s , and the number of discharges is less than the fixed value N of the number of capacitor discharges in a certain period of time s When the energy storage capacitor C is closed 22 Discharge, thereby controlling the fast switch closing; otherwise, when the closing energy storage capacitor C 23 The voltage across the capacitor is greater than the capacitor voltage lock value U s , and the number of discharges is less than the fixed value N of the number of capacitor discharges in a certain period of time s When the energy storage capacitor C is closed 23 Discharge, thereby controlling the rapid switch closing, otherwise a fault will be displayed in the background.

[0057] It should be noted that when the three groups of gate energy storage capacitors C 11 , C 12 , C 13 The voltage at both ends is less than or equal to the capacitor voltage lock value U s , the number of discharges is greater than or equal to the fixed value N of the number of capacitor discharges in a certain time s When the fast switch is locked and opened, the background displays a fault; when the three-group switch energy storage capacitor C 21 , C 22 , C 23 The voltage at both ends is less than or equal to the capacitor voltage lock value U s , the number of discharges is greater than or equal to the fixed value N of the number of capacitor discharges in a certain time s The fast switch is locked and closed, and a fault is displayed in the background.

[0058] In addition, the energy storage device of this embodiment has a specific timing sequence of switching on and off of the energy storage capacitor when multiple faults occur in the line:

[0059] When a transient fault occurs in the line, the energy storage capacitor that meets the set conditions for opening is discharged, the switch is opened quickly, and the current limiting device is put into operation. After a delay, the energy storage capacitor that meets the set conditions for closing is discharged, the switch is closed quickly, and the current limiting device is shut down. The switch is stored and the reclosing is charged to prepare for the next fault.

[0060] When a permanent fault occurs in the line, the opening energy storage capacitor that meets the set conditions is discharged, the rapid switch is opened, and the current limiting device is put into operation. After a delay, the closing energy storage capacitor that meets the set conditions is discharged, the rapid switch is closed, and the current limiting device is shut down. The reclosing operation is carried out, the line recloses to the fault, the opening energy storage capacitor that meets the set conditions is discharged, the rapid switch is opened, the current limiting device is put into operation, the faulty line is accelerated to trip, and after a delay, the closing energy storage capacitor that meets the set conditions is discharged, the rapid switch is closed, the current limiting device is shut down, and the switch energy storage and reclosing charging are carried out to prepare for the next fault.

[0061] In this regard, three groups of combined switch energy storage capacitors are also used as an example for explanation.

[0062] For the first case, when multiple instantaneous faults occur on the line. Figure 3 To explain, the first line fault is a transient fault, and the energy storage capacitor C 11 Discharge, quick switch opening, current limiting device put into operation, delay t s Closing energy storage capacitor C 21 Discharge, fast switch closing, current limiting device out of operation; the second line fault is instantaneous, open the energy storage capacitor C 12 Discharge, quick switch opening, current limiting device put into operation, delay t s Closing energy storage capacitor C 22 Discharge, fast switch closing; the third line fault is a transient fault, open the energy storage capacitor C 13 Discharge, quick switch opening, current limiting device put into operation, delay t s Closing energy storage capacitor C 23 Discharge and close the switch quickly.

[0063] For the second case, there are transient faults and permanent faults in the line. Figure 4 The first line fault is a transient fault, and the energy storage capacitor C 11 Discharge, quick switch opening, current limiting device put into operation, delay t s Closing energy storage capacitor C 21Discharge, fast switch closing, current limiting device out of operation; the second line is a permanent fault, open the energy storage capacitor C 12 Discharge, quick switch opening, current limiting device put into operation, delay t s Closing energy storage capacitor C 22 Discharge, fast switch closing, line overlaps with fault, open energy storage capacitor C 13 Discharge, quick switch opening, current limiting device put into operation, delay t s Closing energy storage capacitor C 23 Discharge and close the switch quickly.

[0064] For the first two situations, after the first fault of the line, the reclosing switch will close the circuit. When the second fault time is less than t3-t2 or t7-t5, it is judged as a permanent fault; when the second fault time is greater than or equal to t3-t2 or t7-t5, it is judged as a transient fault.

[0065] In addition, the controller can also display real-time information about the energy storage device of the electromagnetic repulsion fast circuit breaker, such as current value, capacitor voltage value, capacitor discharge times, "device failure", etc. When the controller detects abnormal information of "device failure", it will immediately send out an alarm signal and upload the alarm signal to the monitoring center to notify the operation and maintenance personnel for repair in time.

[0066] The present embodiment provides an energy storage device suitable for an electromagnetic repulsion fast circuit breaker, including an information monitoring module, a controller, an energy storage capacitor module and a fast switch, wherein the information monitoring module is used to monitor line information, capacitor operation information and position information of the fast switch; the energy storage capacitor module is provided with several groups of opening energy storage capacitors and closing energy storage capacitors, and is used to discharge the corresponding energy storage capacitors according to the control instructions of the controller, thereby controlling the opening and closing of the fast switch; the controller is used to rotate and determine the energy storage capacitors that meet the set conditions from several groups of energy storage capacitors according to the line information and operation information and issue corresponding discharge control instructions; and is also used to determine whether the fast switch has an opening and closing fault according to the position information.

[0067] The energy storage system of this embodiment controls the fast switch through multiple groups of energy storage capacitors, determines the operating status of the energy storage device of the electromagnetic repulsion fast circuit breaker by monitoring the capacitor voltage, the number of capacitor discharges, and the switch position, and promptly sends a signal to notify the operation and maintenance personnel to repair in case of a fault. The capacitor with insufficient capacity is automatically avoided and locked through energy storage capacitor voltage monitoring, and the operating status of the fast switch is monitored by the fast switch position. Thus, multiple opening and closing operations of the electromagnetic repulsion fast circuit breaker can be achieved in a short period of time, which solves the technical problem of capacitor insertion and withdrawal after multiple faults in a short period of time and improves the operating reliability of the power grid.

[0068] The above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit the same. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that the technical solutions described in the aforementioned embodiments may still be modified, or some of the technical features may be replaced by equivalents. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. An energy storage device suitable for an electromagnetic repulsion fast circuit breaker, characterized in that: include: Information monitoring module, controller, energy storage capacitor module and fast switch; The information monitoring module is used to monitor the line information, the operation information of the energy storage capacitor module and the position information of the fast switch and send them to the controller; The energy storage capacitor module is provided with a plurality of groups of opening energy storage capacitors and closing energy storage capacitors, which are used to discharge the corresponding energy storage capacitors according to the control instructions of the controller, thereby controlling the opening and closing of the fast switch; The controller is used to judge whether there is an energy storage capacitor that meets the set conditions from among a plurality of groups of energy storage capacitors in rotation according to the line information and the operation information, and to issue a corresponding discharge control instruction to the energy storage capacitor that meets the conditions; It is also used to determine whether the fast switch after the energy storage capacitor module is actuated has an opening and closing fault according to the position information; The information monitoring module specifically includes: a fault current monitoring module, a capacitor voltage monitoring module, a capacitor discharge times counting module and a switch position monitoring module; The fault current monitoring module is used to monitor the fault current of the line and transmit the detection data to the controller in real time; The capacitor voltage monitoring module is used to monitor the voltage across each closing energy storage capacitor and opening energy storage capacitor in the energy storage capacitor module, and transmit the detection data to the controller in real time; The capacitor discharge times counting module is used to monitor the discharge times of each closing energy storage capacitor and opening energy storage capacitor in the energy storage capacitor module, and transmit the detection data to the controller in real time; The switch position monitoring module is used to monitor the opening and closing positions of the fast switch and transmit the detection data to the controller in real time; The controller is provided with a fault current setting value, and judging whether there is an energy storage capacitor that meets the set conditions from a plurality of groups of energy storage capacitors in rotation according to the line information and the operation information specifically includes: When the fault current is not less than the fault current set value, judging in rotation whether there is a switch-off energy storage capacitor that meets the set conditions from among the plurality of switch-off energy storage capacitors according to the operation information, so as to issue a discharge control instruction to the switch-off energy storage capacitor that meets the conditions; When the fault current is less than the fault current set value, it is determined whether there is a closing energy storage capacitor that meets the set conditions from among a plurality of combined closing energy storage capacitors according to the operation information, so as to issue a discharge control instruction to the closing energy storage capacitor that meets the conditions.

2. The energy storage device suitable for electromagnetic repulsion fast circuit breaker according to claim 1, characterized in that: The controller is also provided with a capacitor voltage lockout value and a capacitor discharge count value within a set time, and the set conditions are specifically: The voltage across the energy storage capacitor is greater than the capacitor voltage lock-in fixed value and the discharge times of the energy storage capacitor are less than the capacitor discharge times set value within the set time.

3. The energy storage device suitable for electromagnetic repulsion fast circuit breaker according to claim 1, characterized in that: The capacitor switching-in and switching-out timing sequences of several groups of switching energy storage capacitors and closing energy storage capacitors when multiple faults occur on the line specifically include: When a transient fault occurs in the line, the opening energy storage capacitor that meets the set conditions is discharged, the fast switch is opened, and the current limiting device is put into operation. After a delay, the closing energy storage capacitor that meets the set conditions is discharged, the fast switch is closed, and the current limiting device is stopped. The switch is stored and the reclosing is charged to prepare for the next fault; When a permanent fault occurs in the line, the opening energy storage capacitor that meets the set conditions is discharged, the fast switch is opened, and the current limiting device is put into operation. After a delay, the closing energy storage capacitor that meets the set conditions is discharged, the fast switch is closed, and the current limiting device is shut down. The reclosing action is performed, the line recloses to the fault, the opening energy storage capacitor that meets the set conditions is discharged, the fast switch is opened, the current limiting device is put into operation, the faulty line is accelerated to trip, and after a delay, the closing energy storage capacitor that meets the set conditions is discharged, the fast switch is closed, the current limiting device is shut down, and the switch energy storage and reclosing charging are performed to prepare for the next fault.

4. The energy storage device suitable for electromagnetic repulsion fast circuit breaker according to claim 1, characterized in that: The controller is also used for: When the plurality of energy storage capacitors do not meet the set conditions, the opening and closing of the fast switch is locked and a fault message is issued.

5. The energy storage device suitable for electromagnetic repulsion fast circuit breaker according to claim 1, characterized in that: The controller is also used for: Displays real-time current value, capacitor voltage value, capacitor discharge times and device fault information.

6. The energy storage device suitable for electromagnetic repulsion fast circuit breaker according to claim 5, characterized in that: When the controller detects the device failure information, the controller sends out an alarm signal and uploads the alarm signal to the monitoring center.

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