CN117913741A - Energy storage equipment overcurrent protection method and device - Google Patents
Energy storage equipment overcurrent protection method and device Download PDFInfo
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Abstract
The invention provides an energy storage equipment overcurrent protection method and device, wherein the energy storage equipment overcurrent protection device comprises the following steps: the device comprises energy storage equipment, a controller, a first contactor, a current limiting inductor and a first circuit breaker, wherein the output anode of the energy storage equipment is connected with one end of the first contactor; the other end of the first contactor is connected with one end of the current-limiting inductor; the other end of the current-limiting inductor is connected with one end of the first circuit breaker; the other end of the first circuit breaker is connected with one end of an external capacitive load; the output cathode of the energy storage device is connected with the other end of the external capacitive load; the controller is connected with the energy storage device, the first contactor and the first breaker respectively. To improve the operational reliability of the energy storage device.
Description
Technical Field
The invention relates to the technical field of circuit protection, in particular to an energy storage device overcurrent protection method and device.
Background
Along with the enlargement of the energy storage equipment, the number of contained electrical parameters is increased, the arrangement of components in the energy storage equipment is also more and more complex, so that parasitic capacitance and stray inductance among the components are increased, thereby leading to the increase of short-circuit current and impact current and reducing the working reliability of the energy storage equipment.
Disclosure of Invention
In view of the above, the present invention is directed to providing an energy storage device over-current protection method and apparatus to improve the working reliability of the energy storage device.
In a first aspect, an embodiment of the present invention provides an energy storage device overcurrent protection apparatus, including: the energy storage device, the controller, the first contactor, the current limiting inductor and the first circuit breaker, wherein,
The output positive electrode of the energy storage device is connected with one end of the first contactor;
the other end of the first contactor is connected with one end of the current-limiting inductor;
The other end of the current-limiting inductor is connected with one end of the first circuit breaker;
The other end of the first circuit breaker is connected with one end of an external capacitive load;
the output cathode of the energy storage device is connected with the other end of the external capacitive load;
the controller is connected with the energy storage device, the first contactor and the first breaker respectively.
With reference to the first aspect, an embodiment of the present invention provides a first possible implementation manner of the first aspect, where after the controller monitors that the energy storage device is started, the controller outputs a circuit breaking start closing signal to the first circuit breaker, so that the first circuit breaker closes according to the circuit breaking start closing signal; after the first circuit breaker is switched on, a circuit breaking starting and switching-on response signal is returned to the controller, after the controller receives the circuit breaking starting and switching-on response signal, a starting signal is output to the first contactor, the first contactor is closed according to the starting signal, and a starting response signal is returned to the controller.
With reference to the first aspect, the embodiment of the present invention provides a second possible implementation manner of the first aspect, where the method further includes:
And one end of the second circuit breaker is connected with the output negative electrode of the energy storage device, and the other end of the second circuit breaker is connected with the other end of the external capacitive load.
With reference to the second possible implementation manner of the first aspect, an embodiment of the present invention provides a third possible implementation manner of the first aspect, where the method further includes:
and one end of the second contactor is connected with the output negative electrode of the energy storage device, and the other end of the second contactor is connected with one end of the second breaker.
With reference to the third possible implementation manner of the first aspect, an embodiment of the present invention provides a fourth possible implementation manner of the first aspect, where the method further includes: a shunt, a first fuse, and a triac, wherein,
One end of the shunt is connected with the output negative electrode of the energy storage device, and the other end of the shunt is connected with one end of the second contactor;
One end of the first fuse is connected with the output positive electrode of the energy accumulator, and the other end of the first fuse is connected with one end of the first contactor;
the other end of the bidirectional controllable thyristor is connected with the other end of the first contactor;
The controller is also connected with the shunt, the first fuse and the bidirectional controllable thyristor respectively.
With reference to the third possible implementation manner of the first aspect, an embodiment of the present invention provides a fifth possible implementation manner of the first aspect, where the method further includes:
one end of the second fuse is connected with the other end of the second contactor, and the other end of the second fuse is respectively connected with one end of the bidirectional controllable thyristor and one end of the second breaker;
the controller is also connected to the second fuse.
With reference to the first aspect, the first possible implementation manner of the first aspect, and any one of the first possible implementation manner to the fifth possible implementation manner of the first aspect, the present embodiment provides a sixth possible implementation manner of the first aspect, where the first contactor includes: switches, metal-oxide semiconductor field effect transistors.
In a second aspect, an embodiment of the present invention further provides an energy storage device over-current protection method, including:
After the energy storage equipment is monitored to be started, outputting a breaking starting closing signal to a first breaker in an overcurrent starting circuit, wherein the overcurrent starting circuit comprises the energy storage equipment, a first contactor, a current limiting inductor, the first breaker and an external capacitive load;
receiving a circuit breaking starting and closing response signal returned by the first circuit breaker after closing according to the circuit breaking starting and closing signal, and outputting a starting signal to the first contactor;
and receiving a starting response signal returned by the first contactor after the starting signal is closed, and determining that the loop is closed.
In a third aspect, an embodiment of the present application provides a computer device, including a memory, a processor, and a computer program stored on the memory and executable on the processor, where the processor implements the steps of the method described above when executing the computer program.
In a fourth aspect, embodiments of the present application provide a computer readable storage medium having stored thereon a computer program which, when executed by a processor, performs the steps of the method described above.
The embodiment of the invention provides an energy storage equipment overcurrent protection method and device, wherein the device comprises the following steps: the device comprises energy storage equipment, a controller, a first contactor, a current limiting inductor and a first circuit breaker, wherein the output anode of the energy storage equipment is connected with one end of the first contactor; the other end of the first contactor is connected with one end of the current-limiting inductor; the other end of the current-limiting inductor is connected with one end of the first circuit breaker; the other end of the first circuit breaker is connected with one end of an external capacitive load; the output cathode of the energy storage device is connected with the other end of the external capacitive load; the controller is connected with the energy storage device, the first contactor and the first breaker respectively. Therefore, the impact current of the energy storage equipment during starting is limited by closing the first circuit breaker and then closing the first contactor and utilizing the current limiting inductor at the end of the first contactor, so that the reliability of the energy storage equipment is improved.
In order to make the above objects, features and advantages of the present invention more comprehensible, preferred embodiments accompanied with figures are described in detail below.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings that are needed in the embodiments will be briefly described below, it being understood that the following drawings only illustrate some embodiments of the present invention and therefore should not be considered as limiting the scope, and other related drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
Fig. 1 shows a schematic structural diagram of an overcurrent protection device for an energy storage device according to an embodiment of the present invention;
fig. 2 is a schematic flow chart of an over-current protection method of an energy storage device according to an embodiment of the present invention;
Fig. 3 is a schematic structural diagram of a computer device 300 according to an embodiment of the present application.
Detailed Description
For the purpose of making the objects, technical solutions and advantages of the embodiments of the present invention more apparent, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention, and it is apparent that the described embodiments are only some embodiments of the present invention, not all embodiments. The components of the embodiments of the present invention generally described and illustrated in the figures herein may be arranged and designed in a wide variety of different configurations. Thus, the following detailed description of the embodiments of the invention, as presented in the figures, is not intended to limit the scope of the invention, as claimed, but is merely representative of selected embodiments of the invention. All other embodiments, which can be made by a person skilled in the art without making any inventive effort, are intended to be within the scope of the present invention.
The embodiment of the invention provides an energy storage device overcurrent protection method and device, and the method and device are described below through the embodiment.
Fig. 1 shows a schematic structural diagram of an over-current protection device for an energy storage device according to an embodiment of the present invention. As shown in fig. 1, the energy storage device overcurrent protection device includes: an energy storage device 101, a controller 102, a first contactor 103, a current limiting inductance 104, a first circuit breaker 105, wherein,
The output anode of the energy storage device 101 is connected with one end of the first contactor 103;
The other end of the first contactor 103 is connected with one end of a current-limiting inductor 104;
the other end of the current limiting inductor 104 is connected with one end of a first circuit breaker 105;
the other end of the first circuit breaker 105 is connected to one end of an external capacitive load;
the output cathode of the energy storage device 101 is connected with the other end of the external capacitive load;
The controller 102 is connected to the energy storage device 101, the first contactor 103 and the first circuit breaker 105, respectively.
In the embodiment of the application, after the controller monitors that the energy storage equipment is started, outputting a breaking starting closing signal to the first circuit breaker so that the first circuit breaker closes according to the breaking starting closing signal; after the first circuit breaker is switched on, a circuit breaking starting and switching-on response signal is returned to the controller, after the controller receives the circuit breaking starting and switching-on response signal, a starting signal is output to the first contactor, the first contactor is closed according to the starting signal, and a starting response signal is returned to the controller, so that energy supply of the energy storage equipment to an external capacitive load is realized.
In the implementation of the invention, after the first contactor is closed, the current limiting inductance at the end of the first contactor can be used for limiting the impact current when the energy storage equipment is started, so that the output current is in a bearable range, and the components in the energy storage equipment are protected, thereby improving the reliability of the energy storage equipment.
In an embodiment of the present invention, as an alternative embodiment, the capacitive load is an inverter.
In an embodiment of the present invention, as an optional embodiment, the method further includes:
And one end of the second circuit breaker 106 is connected with the output cathode of the energy storage device 101, and the other end of the second circuit breaker is connected with the other end of the external capacitive load.
In the embodiment of the invention, the reliability of the circuit can be improved by arranging the first circuit breaker on the output positive circuit and the second circuit breaker on the output negative circuit of the energy accumulator.
In an embodiment of the present invention, as another optional embodiment, the method further includes:
And one end of the second contactor 107 is connected with the output negative electrode of the energy storage device 101, and the other end of the second contactor is connected with one end of the second circuit breaker 106.
In the embodiment of the application, after the controller monitors that the energy storage equipment is started, a circuit breaking starting and closing signal is output to the first circuit breaker and the second circuit breaker, so that the first circuit breaker and the second circuit breaker respectively perform closing according to the circuit breaking starting and closing signal; after the first circuit breaker and the second circuit breaker are switched on, a circuit breaking starting and switching-on response signal is returned to the controller, after the controller receives the circuit breaking starting and switching-on response signals of the first circuit breaker and the second circuit breaker, a second starting signal is output to the second contactor, the second contactor is closed according to the second starting signal, a second starting response signal is returned to the controller, after the controller receives the second starting response signal, a first starting signal is output to the first contactor, and the first contactor is closed according to the first starting signal, so that the energy storage equipment supplies energy to an external capacitive load.
In an embodiment of the present invention, as an alternative embodiment, taking the first contactor as an example, the first contactor includes but is not limited to: switches, metal-oxide semiconductor field effect transistors.
In an embodiment of the present invention, as a further alternative embodiment, the method further includes: a shunt 108, a first fuse 109, and a triac 110, wherein,
A shunt 108, one end of which is connected to the output negative electrode of the energy storage device 101, and the other end of which is connected to one end of the second contactor 107;
A first fuse 109 having one end connected to the positive output electrode of the accumulator 101 and the other end connected to one end of the first contactor 103;
A bidirectional thyristor 110, one end of which is connected to the other end of the second contactor 107, and the other end of which is connected to the other end of the first contactor 103;
The controller 102 is also connected to a shunt 108, a first fuse 109 and a triac 110, respectively.
In an embodiment of the present invention, as a further alternative embodiment, the method further includes:
A second fuse 111 having one end connected to the other end of the second contactor 107 and the other end connected to one end of the triac 110 and one end of the second circuit breaker 106, respectively;
the controller 102 is also connected to a second fuse 111.
In the embodiment of the invention, the second fuse is used for fusing when the current on the capacitive load side is larger due to the abnormality of the capacitive load, so that the energy storage equipment respectively forms a current loop on two sides of the second fuse by using the bidirectional controllable thyristors, thereby reducing the current in the current loop on the energy storage equipment side and protecting components in the energy storage equipment.
In the embodiment of the invention, the current is detected by the current divider, the detected current value is reported to the controller, and the controller controls a circuit formed by the overcurrent protection device of the energy storage equipment according to the detected current value and preset current thresholds.
In the embodiment of the present invention, as an optional embodiment, the current divider detects and obtains a current value in a circuit formed by the overcurrent protection device of the energy storage device, outputs the detected current value to the controller, and the controller determines whether the current value is smaller than a set recoverable fault current threshold value: if the controller determines that the reported current value is greater than the preset rated current value and less than the preset recoverable fault current threshold, indicating that the circuit formed by the energy storage device overcurrent protection device is faulty, and if the fault is a recoverable fault, executing preset overcurrent protection logic: the controller outputs a fault conduction signal to the bidirectional controllable thyristor, the bidirectional controllable thyristor is conducted according to the received fault conduction signal, timing is carried out, a fault conduction response signal is returned to the controller, the controller receives the fault conduction response signal, a contact disconnection signal is output to the first contactor and the second contactor, and the first contactor and the second contactor are disconnected according to the received contact disconnection signal respectively;
After timing reaches a preset timing threshold, the bidirectional controllable thyristor is turned off, and a fault turn-off signal is output to the controller, so that the controller restarts the energy storage device according to the received fault turn-off signal.
In the embodiment of the invention, after the bidirectional thyristor is conducted, the bidirectional thyristor, the current limiting inductor, the first circuit breaker, the external capacitive load and the second circuit breaker form a fault current return circuit, the current is larger, and the energy storage equipment, the first fuse, the first contactor, the bidirectional thyristor, the second fuse, the second contactor and the shunt form another current loop with smaller current. In this way, under the condition that the current value exceeds the rated current value but is smaller than the threshold value of the recoverable fault current, the follow current of the current-limiting inductor passes through the controllable thyristor, so that components in the energy storage device are protected.
In the embodiment of the invention, after the bidirectional controllable thyristor is conducted, the controller receives the fault conduction response signal and outputs the disconnection signal to the first contactor and the second contactor, so that the service lives of the first contactor and the second contactor can be effectively prolonged.
In the embodiment of the invention, after the bidirectional thyristor is turned on, a preset timing threshold is passed, for example, after 3 minutes, the controller starts the operation logic, that is, restarts the energy storage device, and slightly different is that when restarting, the first circuit breaker and the second circuit breaker are in a closed state.
In the embodiment of the invention, if the controller determines that the reported current value is smaller than or equal to the preset rated current value, the controller determines that the circuit is not abnormal and continues to normally operate.
In the embodiment of the present invention, as another optional embodiment, the controller determines that the current value is greater than or equal to the recoverable fault current value, which indicates that the energy storage device has a high current fault, and the energy storage device enters the unrecoverable protection logic:
If the controller determines that the current value is larger than or equal to the recoverable fault current value and smaller than a preset short-circuit current threshold, outputting a tripping signal to the first circuit breaker and the second circuit breaker;
The first circuit breaker and the second circuit breaker are respectively disconnected according to the received tripping signals, and after the disconnection, tripping response signals are respectively returned to the controller;
The controller receives the tripping response signal and outputs a fault disconnection signal to the first contactor and the second contactor;
The first contactor and the second contactor are respectively disconnected according to the received fault disconnection signals, and after disconnection, fault disconnection response signals are respectively returned to the controller.
In the embodiment of the invention, after the energy storage equipment has a high-current fault, the controller firstly opens the first breaker and the second breaker, and then opens the first contactor and the second contactor, thereby realizing high-current fault protection logic.
In the embodiment of the present invention, as an optional embodiment, the controller is further configured to send alarm information to a preset terminal device after determining that the current value is greater than or equal to the recoverable fault current value, so that maintenance personnel corresponding to the terminal device that receives the alarm information perform timely maintenance.
In an embodiment of the present invention, as another optional embodiment, the controller is further configured to send a status report instruction to the bidirectional thyristor, the first circuit breaker, the second circuit breaker, the energy storage device, the first fuse, the first contactor, the second fuse, the second contactor, and the shunt after determining that the current value is greater than or equal to the recoverable fault current value, so that each component receiving the status report instruction reports a status parameter of the current operation, where different components set the reported status parameter may be different, and specifically, the reported status parameter information and the number may be set according to the fault diagnosis requirement of each component, and send the status parameter to a terminal device set in advance after receiving the reported status parameter of the current operation, so that a maintainer corresponding to the terminal device analyzes according to the status parameter of each component, and determines the fault source.
In the embodiment of the present invention, as a further alternative embodiment, the controller determines that the current value is greater than or equal to the short-circuit current threshold, and the first fuse and the second fuse implement fusing in a microsecond level of time, which indicates that the energy storage device has a short-circuit fault:
if the controller determines that the current value is greater than or equal to a preset short-circuit current threshold value, the controller receives fusing signals output by the first fuse and the second fuse after fusing, and sends breaker opening signals to the first breaker and the second breaker;
the first circuit breaker and the second circuit breaker are subjected to brake opening according to the received brake opening signals of the circuit breakers, and after the brake opening, a brake opening completion signal of the circuit breaker is returned;
the controller receives a breaker opening completion signal and outputs a contactor opening signal to the first contactor and the second contactor;
the first contactor and the second contactor are subjected to brake separation according to the received contactor brake separation signals, and after brake separation is completed, a contactor brake separation completion signal is returned to the controller.
In the embodiment of the invention, under the condition that the short-circuit current is larger than the set short-circuit current threshold value, the protection of the circuit is finished due to the fusing of the fuse, and in order to prevent the current impact caused by the fact that the circuit breaker and the contactor are not turned off after the energy storage equipment is started, the circuit breaker and the contactor are turned off in sequence, so that the protection logic of the short-circuit current is finished. Further, after determining that the short circuit occurs, the controller also performs wave recording and recording.
In the embodiment of the invention, the active protection is carried out based on the current value and the set threshold value, so that the current for triggering the protection can be effectively reduced, the protection interval is expanded, the service life of the loaded cut-off of the contactor can be prolonged, and the adhesion of the contactor is prevented. Meanwhile, by arranging the slow start circuit, components in the energy storage equipment can be protected from being damaged by impact current. Further, the current limiting inductor can slow down the rising speed of current, so that the size of cut-off current is reduced when fusing, and each component is protected. Moreover, the fuse has strong breaking capacity and quick protection characteristics of the circuit breaker, can protect a short circuit section which cannot be protected by the circuit breaker, can protect large overcurrent, and can break small overcurrent and can recover.
Fig. 2 shows a schematic flow chart of an over-current protection method for an energy storage device according to an embodiment of the present invention. As shown in fig. 2, the controller applied to the overcurrent protection device of the energy storage device shown in fig. 1 includes:
Step 201, after the energy storage device is monitored to be started, outputting a breaking start closing signal to a first breaker in an overcurrent starting circuit, wherein the overcurrent starting circuit comprises the energy storage device, a first contactor, a current limiting inductor, the first breaker and an external capacitive load;
Step 202, receiving a circuit breaking starting closing response signal returned by a first circuit breaker after closing according to the circuit breaking starting closing signal, and outputting a starting signal to a first contactor;
And 203, receiving a starting response signal returned by the first contactor according to the closing of the starting signal, and determining that the loop is closed.
In an embodiment of the present invention, as an optional embodiment, the loop further includes: the second circuit breaker, the second contactor, the shunt, the first fuse, the second fuse and the bidirectional controllable thyristor, wherein,
One end of the second circuit breaker is connected with the output negative electrode of the energy storage device, and the other end of the second circuit breaker is connected with the other end of the external capacitive load;
One end of the second contactor is connected with the output negative electrode of the energy storage device, and the other end of the second contactor is connected with one end of the second breaker;
one end of the shunt is connected with the output negative electrode of the energy storage device, and the other end of the shunt is connected with one end of the second contactor;
One end of the first fuse is connected with the output positive electrode of the energy accumulator, and the other end of the first fuse is connected with one end of the first contactor;
the other end of the bidirectional controllable thyristor is connected with the other end of the first contactor;
one end of the second fuse is connected with the other end of the second contactor, and the other end of the second fuse is respectively connected with one end of the bidirectional controllable thyristor and one end of the second breaker;
The controller is also connected with the second circuit breaker, the second contactor, the shunt, the first fuse, the second fuse and the bidirectional controllable thyristor respectively.
In an embodiment of the present invention, as an optional embodiment, the method further includes:
Acquiring a current value detected by a shunt in the loop;
if the current value is smaller than or equal to the preset rated current value, executing the step of acquiring the current value of the current divider in the loop according to the preset current detection period;
If the current value is determined to be larger than the preset rated current value and smaller than the recoverable fault current threshold, outputting a fault conduction signal to the bidirectional controllable thyristor so as to conduct the bidirectional controllable thyristor according to the received fault conduction signal, timing the bidirectional controllable thyristor, returning a fault conduction response signal to the controller, and turning off the bidirectional controllable thyristor after timing to the preset timing threshold and outputting a fault turn-off signal to the controller;
receiving a fault conduction response signal, and outputting a contact disconnection signal to the first contactor and the second contactor so that the first contactor and the second contactor are disconnected according to the received contact disconnection signal respectively;
And restarting the energy storage device according to the received fault shutdown signal.
In an embodiment of the present invention, as another optional embodiment, the method further includes:
If the current value is determined to be greater than or equal to the restorable fault current threshold and less than the preset short-circuit current threshold, outputting a tripping signal to the first circuit breaker and the second circuit breaker, so that the first circuit breaker and the second circuit breaker are disconnected according to the received tripping signals respectively, and after disconnection, returning tripping response signals to the controller respectively;
And receiving a tripping response signal, outputting fault disconnection signals to the first contactor and the second contactor so that the first contactor and the second contactor are disconnected according to the received fault disconnection signals respectively, and returning the fault disconnection response signals to the controller after disconnection.
In an embodiment of the present invention, as a further alternative embodiment, the method further includes:
If a fusing signal output by the first fuse and the second fuse after fusing is received, issuing a breaker opening signal to the first breaker and the second breaker so that the first breaker and the second breaker can open according to the received breaker opening signal, and returning a breaker opening completion signal after opening;
receiving a breaker opening completion signal, outputting a contactor opening signal to the first contactor and the second contactor, so that the first contactor and the second contactor carry out opening according to the received contactor opening signal, and returning the contactor opening completion signal to the controller after opening is completed.
In the embodiment of the invention, if the current value is greater than or equal to the short-circuit current threshold, the first fuse and the second fuse are fused, and after fusing, a fusing signal is output to the controller.
In the embodiment of the present invention, as an optional embodiment, it is determined whether the first contactor, the second contactor, the first circuit breaker, and the second circuit breaker complete switching on (conducting, closing) or trip (switching off ), by detecting the voltage of the corresponding components, for example, the voltage of the two ends of the first contactor, if the voltage of the two ends of the components is less than a preset switching-on voltage threshold, for example, 0.5V, then it is determined that switching-on is successful; if the voltage at the two ends of the component is larger than the preset opening voltage threshold value, the successful opening is determined.
As shown in fig. 3, an embodiment of the present application provides a computer device 300 for performing the method for protecting an energy storage device from overcurrent in fig. 2, where the device includes a memory 301, a processor 302 connected to the memory 301 through a bus, and a computer program stored on the memory 301 and capable of running on the processor 302, where the steps of the method for protecting an energy storage device from overcurrent are implemented when the processor 302 executes the computer program.
Specifically, the memory 301 and the processor 302 can be general-purpose memories and processors, which are not limited herein, and the energy storage device overcurrent protection method can be executed when the processor 302 runs a computer program stored in the memory 301.
Corresponding to the energy storage device over-current protection method in fig. 2, the embodiment of the application further provides a computer readable storage medium, on which a computer program is stored, which when being executed by a processor, performs the steps of the energy storage device over-current protection method.
In particular, the storage medium can be a general-purpose storage medium, such as a mobile magnetic disk, a hard disk, etc., and the computer program on the storage medium can execute the above-mentioned energy storage device overcurrent protection method when being executed.
In the embodiments provided herein, it should be understood that the disclosed systems and methods may be implemented in other ways. The system embodiments described above are merely illustrative, e.g., the division of the elements is merely a logical functional division, and there may be additional divisions in actual implementation, and e.g., multiple elements or components may be combined or integrated into another system, or some features may be omitted, or not performed. Alternatively, the coupling or direct coupling or communication connection shown or discussed with each other may be through some communication interface, system or unit indirect coupling or communication connection, which may be in electrical, mechanical or other form.
The units described as separate units may or may not be physically separate, and units shown as units may or may not be physical units, may be located in one place, or may be distributed on a plurality of network units. Some or all of the units may be selected according to actual needs to achieve the purpose of the solution of this embodiment.
In addition, each functional unit in the embodiments provided in the present application may be integrated in one processing unit, or each unit may exist alone physically, or two or more units may be integrated in one unit.
The functions, if implemented in the form of software functional units and sold or used as a stand-alone product, may be stored in a computer-readable storage medium. Based on this understanding, the technical solution of the present application may be embodied essentially or in a part contributing to the prior art or in a part of the technical solution, in the form of a software product stored in a storage medium, comprising several instructions for causing a computer device (which may be a personal computer, a server, a network device, etc.) to perform all or part of the steps of the method according to the embodiments of the present application. And the aforementioned storage medium includes: a U-disk, a removable hard disk, a read-only memory (ROM), a random access memory (Random Access Memory, RAM), a magnetic disk, or an optical disk, or other various media capable of storing program codes.
It should be noted that: like reference numerals and letters in the following figures denote like items, and thus once an item is defined in one figure, no further definition or explanation of it is required in the following figures, and furthermore, the terms "first," "second," "third," etc. are used merely to distinguish one description from another and are not to be construed as indicating or implying relative importance.
Finally, it should be noted that: the above examples are only specific embodiments of the present application, and are not intended to limit the scope of the present application, but it should be understood by those skilled in the art that the present application is not limited thereto, and that the present application is described in detail with reference to the foregoing examples: any person skilled in the art may modify or easily conceive of the technical solution described in the foregoing embodiments, or perform equivalent substitution of some of the technical features, while remaining within the technical scope of the present disclosure; such modifications, changes or substitutions do not depart from the spirit and scope of the corresponding technical solutions. Are intended to be encompassed within the scope of the present application. Therefore, the protection scope of the present application shall be subject to the protection scope of the claims.
Claims (10)
1. An energy storage device overcurrent protection apparatus, comprising: the energy storage device, the controller, the first contactor, the current limiting inductor and the first circuit breaker, wherein,
The output positive electrode of the energy storage device is connected with one end of the first contactor;
the other end of the first contactor is connected with one end of the current-limiting inductor;
The other end of the current-limiting inductor is connected with one end of the first circuit breaker;
The other end of the first circuit breaker is connected with one end of an external capacitive load;
the output cathode of the energy storage device is connected with the other end of the external capacitive load;
the controller is connected with the energy storage device, the first contactor and the first breaker respectively.
2. The energy storage device overcurrent protection apparatus according to claim 1, wherein the controller outputs a circuit breaking start closing signal to the first circuit breaker after monitoring that the energy storage device is started, so that the first circuit breaker performs closing according to the circuit breaking start closing signal; after the first circuit breaker is switched on, a circuit breaking starting and switching-on response signal is returned to the controller, after the controller receives the circuit breaking starting and switching-on response signal, a starting signal is output to the first contactor, the first contactor is closed according to the starting signal, and a starting response signal is returned to the controller.
3. The energy storage device over-current protection apparatus of claim 1, further comprising:
And one end of the second circuit breaker is connected with the output negative electrode of the energy storage device, and the other end of the second circuit breaker is connected with the other end of the external capacitive load.
4. The energy storage device over-current protection apparatus of claim 3, further comprising:
and one end of the second contactor is connected with the output negative electrode of the energy storage device, and the other end of the second contactor is connected with one end of the second breaker.
5. The energy storage device over-current protection apparatus of claim 4, further comprising: a shunt, a first fuse, and a triac, wherein,
One end of the shunt is connected with the output negative electrode of the energy storage device, and the other end of the shunt is connected with one end of the second contactor;
One end of the first fuse is connected with the output positive electrode of the energy accumulator, and the other end of the first fuse is connected with one end of the first contactor;
the other end of the bidirectional controllable thyristor is connected with the other end of the first contactor;
The controller is also connected with the shunt, the first fuse and the bidirectional controllable thyristor respectively.
6. The energy storage device over-current protection apparatus of claim 5, further comprising:
one end of the second fuse is connected with the other end of the second contactor, and the other end of the second fuse is respectively connected with one end of the bidirectional controllable thyristor and one end of the second breaker;
the controller is also connected to the second fuse.
7. The energy storage device over-current protection apparatus of any one of claims 1 to 6, wherein the first contactor comprises: switches, metal-oxide semiconductor field effect transistors.
8. An energy storage device overcurrent protection method is characterized by comprising the following steps:
After the energy storage equipment is monitored to be started, outputting a breaking starting closing signal to a first breaker in an overcurrent starting circuit, wherein the overcurrent starting circuit comprises the energy storage equipment, a first contactor, a current limiting inductor, the first breaker and an external capacitive load;
receiving a circuit breaking starting and closing response signal returned by the first circuit breaker after closing according to the circuit breaking starting and closing signal, and outputting a starting signal to the first contactor;
and receiving a starting response signal returned by the first contactor after the starting signal is closed, and determining that the loop is closed.
9. A computer device, comprising: a processor, a memory and a bus, the memory storing machine-readable instructions executable by the processor, the processor and the memory in communication via the bus when the computer device is running, the machine-readable instructions when executed by the processor performing the steps of the energy storage device over-current protection method of claim 8.
10. A computer readable storage medium, characterized in that the computer readable storage medium has stored thereon a computer program which, when run by a processor, performs the steps of the energy storage device over-current protection method according to claim 8.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211240626.0A CN117913741A (en) | 2022-10-11 | 2022-10-11 | Energy storage equipment overcurrent protection method and device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211240626.0A CN117913741A (en) | 2022-10-11 | 2022-10-11 | Energy storage equipment overcurrent protection method and device |
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| Publication Number | Publication Date |
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| CN117913741A true CN117913741A (en) | 2024-04-19 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202211240626.0A Pending CN117913741A (en) | 2022-10-11 | 2022-10-11 | Energy storage equipment overcurrent protection method and device |
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| Country | Link |
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| CN (1) | CN117913741A (en) |
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2022
- 2022-10-11 CN CN202211240626.0A patent/CN117913741A/en active Pending
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