CN114865901A - Control method, device and medium for starting inverter - Google Patents
Control method, device and medium for starting inverter Download PDFInfo
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- CN114865901A CN114865901A CN202210446474.3A CN202210446474A CN114865901A CN 114865901 A CN114865901 A CN 114865901A CN 202210446474 A CN202210446474 A CN 202210446474A CN 114865901 A CN114865901 A CN 114865901A
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M1/00—Details of apparatus for conversion
- H02M1/36—Means for starting or stopping converters
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
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Abstract
The application discloses a control method, a device and a medium for starting an inverter, which are applied to the field of circuits. The method comprises the steps of monitoring short circuit of a circuit between a direct current power supply and a first capacitor, and starting a short-circuit protection circuit if the current in the circuit of the direct current power supply is monitored to be larger than a first threshold value. The short-circuit protection circuit is closed after a first preset time period from the start of the short-circuit protection circuit, and if the current in the circuit of the direct-current power supply is monitored to be larger than a second threshold value within a second preset time period after the short-circuit protection circuit is closed, the short-circuit protection circuit is started; and the second preset time length is less than the time length for starting the inverter. And shielding the short-circuit monitoring if the current in the circuit of the direct-current power supply is not monitored to be larger than a second threshold value within a second preset time after the short-circuit protection circuit is closed. The method provided by the application can determine whether the circuit is really short-circuited or not, and can normally start the inverter on the premise of ensuring the safety of the circuit.
Description
Technical Field
The present application relates to the field of circuits, and in particular, to a method, an apparatus, and a medium for controlling a startup inverter.
Background
The inverter is an important electrical device in the field of household energy storage application, and can invert a direct current power supply such as a battery and the like into an alternating current power supply so as to be used by various household appliances requiring the alternating current power supply. The circuit design of the inverter is usually additionally provided with large-capacity electrolytic capacitors which can be used for changing the phase difference between voltage and current and improving the output quality of electric energy, and meanwhile, the capacitors can also store a small amount of electric energy in a short time so as to be used as a starting power supply of an electronic circuit in the inverter and realize the smooth starting of the inverter, so the large-capacity capacitors on the inverter circuit play an important role in the normal operation of the inverter. Fig. 1 is a schematic diagram of a connection circuit structure between a DC power supply and a capacitor, and as shown in fig. 1, a loop in which the DC power supply DC is directly connected to the capacitor C0 is a main loop (the switch S1 is closed, the switch S2 is opened), a loop in which the DC power supply DC is connected to the capacitor C0 through the resistor R is a pre-charge loop (the switch S1 is opened, the switch S2 is closed), the main loop and the pre-charge loop can be switched with each other, and the capacitor C0 is used as a starting power supply of an electronic circuit inside an inverter. In general, the main circuit is controlled to be turned on to provide a sufficient voltage to the capacitor C0, and a large charging current is generated at the moment when the DC power source DC is connected to the capacitor C0 due to the fast charging characteristic of the capacitor C0. A general dc power supply cannot withstand a large discharge current for this brief time. After a Battery Management System (BMS) detects a current greater than a threshold, the circuit is switched to a pre-charge circuit to protect the circuit. However, when the electronic circuit inside the inverter consumes the electric energy stored in the capacitor, it needs to be switched back to the main circuit again to provide sufficient voltage. Currently, it is common to set a pre-charge circuit to switch back to the main circuit again after a preset length of time from the first detection of a short circuit, and no solution is provided for the subsequent case where a current greater than a threshold is detected again.
After the secondary pre-charging circuit is switched back to the primary circuit again, the charging between the direct-current power supply and the capacitor is triggered again, and then a short large current appears again; at this time, the circuit does not need to be protected, and the charging is normal. The BMS cannot distinguish a large current caused by charging between the dc power supply and the capacitor from a large current caused by a short circuit actually occurring in the circuit. If the BMS starts short-circuit protection under all conditions, the inverter cannot be normally started; BMS does not initiate short circuit protection under all conditions, which can lead to circuit failure.
Therefore, how to normally start the inverter on the premise of ensuring the circuit safety is an urgent problem to be solved by the technical personnel in the field.
Disclosure of Invention
The application aims to provide a control method, a control device and a control medium for starting an inverter, so that the inverter can be normally started on the premise of ensuring the circuit safety.
In order to solve the above technical problem, the present application provides a control method for starting an inverter, including:
monitoring a short circuit between a direct current power supply and a first capacitor; wherein the first capacitor is a capacitor for starting the inverter;
if the current in the circuit of the direct current power supply is monitored to be larger than a first threshold value, starting a short-circuit protection circuit; wherein the short-circuit protection circuit is a circuit that reduces current in a loop of the direct current power supply and the first capacitor;
closing the short-circuit protection circuit after a first preset time from the start of the short-circuit protection circuit; the first preset time is less than the time for the first capacitor to reach the rated voltage;
if the current in the circuit of the direct current power supply is monitored to be larger than a second threshold value within a second preset time after the short-circuit protection circuit is closed, starting the short-circuit protection circuit; the second preset time length is less than the time length for starting the inverter;
and shielding the short-circuit monitoring if the current in the circuit of the direct-current power supply is not monitored to be larger than the second threshold value within the second preset time after the short-circuit protection circuit is closed.
Preferably, after shielding the short circuit monitoring, the method further includes:
after a third preset time period from the closing of the short-circuit protection circuit, recovering the short-circuit monitoring; the third preset time is longer than the second preset time, and the third preset time is longer than the time for starting the inverter.
Preferably, the third preset time period is determined according to multiple times of historical test data.
Preferably, before determining the first preset time period, the method further includes:
acquiring a capacitance value of the first capacitor;
the determining the first preset duration includes:
determining the first preset time according to the capacitance value; wherein the capacitance value is positively correlated with the first preset time period.
Preferably, the determining the second preset time period comprises:
and determining the second preset time according to the charging time of a second capacitor in the operational amplification circuit of the BMS.
Preferably, the short-circuit protection circuit is specifically:
the direct current power supply and the first capacitor are connected through a resistor;
the start short-circuit protection circuit includes:
and switching a circuit directly connected between the direct current power supply and the first capacitor into a circuit connected through a resistor.
Preferably, after shielding the short circuit monitoring, the method further includes:
resuming the short circuit monitoring after determining that the inverter is started.
In order to solve the above technical problem, the present application further provides a control device for starting an inverter, including:
the monitoring module is used for monitoring the short circuit of the circuit between the direct-current power supply and the first capacitor; wherein the first capacitor is a capacitor for starting the inverter;
the first starting module is used for starting the short-circuit protection circuit if the current in the circuit of the direct-current power supply is monitored to be larger than a first threshold value; wherein the short-circuit protection circuit is a circuit that reduces current in a loop of the direct current power supply and the first capacitor;
the closing module is used for closing the short-circuit protection circuit after a first preset time length from the start of the short-circuit protection circuit; the first preset time is less than the time for the first capacitor to reach the rated voltage;
the second starting module is used for starting the short-circuit protection circuit if the current in the circuit of the direct-current power supply is monitored to be larger than a second threshold value within a second preset time length after the short-circuit protection circuit is closed; the second preset time length is less than the time length for starting the inverter;
and the shielding module is used for shielding the short-circuit monitoring if the current in the circuit of the direct-current power supply is not monitored to be larger than the second threshold value within the second preset time after the short-circuit protection circuit is closed.
In order to solve the above technical problem, the present application further provides a control device for starting an inverter, including: a memory for storing a computer program;
and the processor is used for realizing the steps of the control method for starting the inverter when executing the computer program.
In order to solve the above technical problem, the present application further provides a computer-readable storage medium, where a computer program is stored, and the computer program, when executed by a processor, implements the steps of the control method for starting the inverter.
According to the control method for starting the inverter, short circuit monitoring can be carried out on a circuit between the direct-current power supply and the first capacitor; the first capacitor is a capacitor for starting the inverter. If the current in the circuit of the direct current power supply is monitored to be larger than a first threshold value, starting a short-circuit protection circuit to prevent the element in the circuit from being damaged by the large current; after the short-circuit protection circuit is started, the charging of the first capacitor becomes slow, and the rated voltage can be reached in a long time. Therefore, the short-circuit protection circuit is closed after a first preset time period from the start of the short-circuit protection circuit; the first preset time is less than the time for the first capacitor to reach the rated voltage. If the current in the circuit of the direct-current power supply is monitored to be larger than a second threshold value within a second preset time after the short-circuit protection circuit is closed, the fact that a short circuit does occur in the circuit is represented, the fact that the short circuit is really short-circuited is judged, and the short-circuit protection circuit is started; and the second preset time length is less than the time length for starting the inverter. If the current in the circuit of the direct-current power supply is not monitored to be larger than the second threshold value within the second preset time after the short-circuit protection circuit is closed, the short circuit does not appear in the circuit at the moment, and the current which is larger than the second threshold value and appears before the inverter is started is not really short-circuited, the short-circuit monitoring is shielded to ignore the current which is larger than the second threshold value, and the short-circuit protection is not started. The method provided by the embodiment of the application can determine whether the circuit is really short-circuited or not, and can normally start the inverter on the premise of ensuring the safety of the circuit.
The application also provides a control device and a computer readable storage medium for starting the inverter, which correspond to the method, so the method has the same beneficial effects as the method.
Drawings
In order to more clearly illustrate the embodiments of the present application, the drawings needed for the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present application, and that other drawings can be obtained by those skilled in the art without inventive effort.
FIG. 1 is a schematic diagram of a connection circuit between a DC power supply and a capacitor;
fig. 2 is a flowchart of a control method for starting an inverter according to an embodiment of the present application;
FIG. 3 is a graph of voltage waveforms when a capacitor of a startup inverter is shorted by charging between a DC power source and the capacitor;
fig. 4 is a structural diagram of a control device for starting an inverter according to an embodiment of the present application;
fig. 5 is a structural diagram of a control device for starting an inverter according to another embodiment of the present application.
Detailed Description
The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are only a part of the embodiments of the present application, and not all the embodiments. All other embodiments obtained by a person of ordinary skill in the art based on the embodiments in the present application without any creative effort belong to the protection scope of the present application.
The core of the application is to provide a control method, a device and a medium for starting an inverter so as to normally start the inverter on the premise of ensuring the circuit safety.
In order that those skilled in the art will better understand the disclosure, the following detailed description will be given with reference to the accompanying drawings.
In the application of household energy storage, a lithium ion battery is generally used as a direct current power supply, and if the lithium ion battery is directly connected to a circuit shown in fig. 1, the lithium ion battery is likely to be damaged by instantaneous high-current discharge, so that after the BMS monitors the high current, the discharge overcurrent protection of the lithium ion battery is triggered or a short-circuit protection circuit is started. Taking fig. 1 as an example, when the DC power supply DC normally charges the capacitor C0, the switch S1 is closed, and the switch S2 is opened; after the short-circuit protection circuit is turned on, the switch S1 is opened, and the switch S2 is closed. After the BMS monitors the current larger than the threshold, the circuit is switched to the pre-charge circuit to protect the circuit, and after the secondary pre-charge circuit is switched back to the primary circuit again, the charging between the DC power supply DC and the capacitor C0 is triggered again, and a short large current occurs again; at this time, the circuit does not need to be protected, and the charging is normal. The BMS cannot distinguish whether the charging between the DC source DC and the capacitor C0 causes the current to be greater than a threshold value or whether the circuit is actually shorted causing the current to be greater than the threshold value. If the BMS starts short-circuit protection under all conditions, the inverter cannot be normally started; BMS does not initiate short circuit protection under all conditions, which can lead to circuit failure. Therefore, the embodiment of the application provides a control method for starting the inverter so as to distinguish the two situations. Fig. 2 is a flowchart of a control method for starting an inverter according to an embodiment of the present application; as shown in fig. 2, the method comprises the steps of:
s10: and monitoring the short circuit of the circuit between the direct current power supply and the first capacitor.
The first capacitor is a capacitor for starting the inverter. The embodiment of the present application takes the circuit structure in fig. 1 as an example for explanation, but the method provided by the present application is not limited to the circuit structure shown in fig. 1. As shown in fig. 1, the capacitor C0 is a first capacitor used as a starting power source for the internal electronic circuit of the inverter. Under normal conditions, when the direct current power supply DC charges the first capacitor, the switch S1 is controlled to be closed, and the switch S2 is controlled to be opened (a main loop); if a lithium ion battery or the like is used as the DC power supply DC, when the current in the circuit is larger than the threshold value, the DC power supply DC cannot bear an excessive current and is easily damaged by a large current impact, so that the protection circuit needs to be turned on, that is, the switch S1 is controlled to be turned off, and the switch S2 is turned on (pre-charging circuit).
S11: and if the current in the circuit of the direct current power supply is monitored to be larger than the first threshold value, starting the short-circuit protection circuit.
The short-circuit protection circuit is a circuit for reducing the current in a loop of the direct-current power supply and the first capacitor. At the moment that the direct current power supply DC is connected with the first capacitor, a large charging current can be generated, a first threshold value is preset, when the current between the direct current power supply DC and the loop of the first capacitor is monitored to be larger than the first threshold value, the switch S1 is controlled to be opened, the switch S2 is controlled to be closed, the resistor R is added into the loop, the current in the loop is reduced, and the direct current power supply DC can be protected. In practical applications, the short-circuit protection can be implemented by other circuits, and is not limited to the manner shown in fig. 1, for example, a variable resistor can be added to the original circuit, and when the short-circuit protection circuit is started, the resistance value of the variable resistor can be increased.
S12: and closing the short-circuit protection circuit after a first preset time from the start of the short-circuit protection circuit.
The first preset time is less than the time for the first capacitor to reach the rated voltage. After the short-circuit protection circuit is started, a resistor R is added between the DC power supply DC and the loop of the first capacitor, which may cause a long time for the voltage of the first capacitor to increase to the rated voltage, and the electronic circuit inside the inverter may consume the electric energy stored in the first capacitor, so that after a period of time, the short-circuit protection circuit needs to be turned off, i.e. the loop is switched back to the main loop to provide sufficient voltage. In general, when the voltage of the first capacitor is slightly lower than the rated voltage, the short-circuit protection circuit is turned off, the value of the first preset time is related to the rated voltage and the capacitance of the first capacitor, and in actual setting, the short-circuit protection circuit can be adjusted according to the rated voltage and the capacitance of the first capacitor.
S13: judging that the current in the circuit of the direct-current power supply is monitored to be larger than a second threshold value within a second preset time length after the short-circuit protection circuit is closed; if yes, go to step S14; if not, the process proceeds to step S15.
S14: the short-circuit protection circuit is started.
S15: and shielding short circuit monitoring.
The first preset time length, the second preset time length and the third preset time length can be timed by the timer, wherein the second preset time length is less than the time length for starting the inverter. After the timing is finished, the BMS performs corresponding operations, and the first threshold value and the second threshold value of the current may be set to the same value or different values, and are selected according to actual conditions. FIG. 3 is a graph of voltage waveforms when a capacitor of a startup inverter is shorted by charging between a DC power source and the capacitor; as shown in fig. 3, the BMS monitors for a short circuit between the DC power supply DC and the first capacitor for a long time, detects a short circuit at a point a (usually, the moment when the DC power supply DC is connected to the first capacitor), and switches to the pre-charge circuit, but in the pre-charge circuit, it takes a long time for the first capacitor to reach the rated voltage, and thus, after T1 time, reaches a point B, the main circuit is switched back, and the time T1 can be appropriately adjusted according to the capacitance of the first capacitor. After the main loop is switched back, the circuit is continuously monitored in the time T2 (the time period from the point B to the point C), if the current larger than the second threshold value appears at the time, the real short circuit appears, and the circuit is switched to a pre-charging loop; if the current larger than the second threshold value does not appear, the short circuit monitoring can be temporarily shielded, after the time of T3, the inverter is normally started by the first capacitor at the point D, at this time, a large current appears, and the purpose of shielding the short circuit monitoring is to ignore the large current. After T4 time, the short circuit monitoring is resumed at point E to keep monitoring for abnormal conditions. The duration of T4 is not limited, and is generally to allow sufficient time to start the inverter. The time lengths of T1, T2, T3 and T4 can be set according to actual conditions, wherein T1 is equivalent to a first preset time length, T2 is equivalent to a second preset time length, and T2+ T3+ T4 is equivalent to a third preset time length.
According to the control method for starting the inverter, short circuit monitoring can be carried out on a circuit between the direct-current power supply and the first capacitor; the first capacitor is a capacitor for starting the inverter. If the current in the circuit of the direct current power supply is monitored to be larger than a first threshold value, starting a short-circuit protection circuit to prevent the element in the circuit from being damaged by the large current; after the short-circuit protection circuit is started, the charging of the first capacitor becomes slow, and the rated voltage can be reached in a long time. Therefore, the short-circuit protection circuit is closed after a first preset time period from the start of the short-circuit protection circuit; the first preset time is less than the time for the first capacitor to reach the rated voltage. If the current in the circuit of the direct-current power supply is monitored to be larger than a second threshold value within a second preset time after the short-circuit protection circuit is closed, the fact that a short circuit does occur in the circuit is represented, the fact that the short circuit is really short-circuited is judged, and the short-circuit protection circuit is started; and the second preset time length is less than the time length for starting the inverter. If the current in the circuit of the direct-current power supply is not monitored to be larger than the second threshold value within the second preset time after the short-circuit protection circuit is closed, the short circuit does not appear in the circuit at the moment, and the current which is larger than the second threshold value and appears before the inverter is started is not really short-circuited, the short-circuit monitoring is shielded to ignore the current which is larger than the second threshold value, and the short-circuit protection is not started. The method provided by the embodiment of the application can determine whether the circuit is really short-circuited or not, and can normally start the inverter on the premise of ensuring the safety of the circuit.
In the above embodiment, when the short-circuit monitoring is resumed after the shield short-circuit monitoring is not limited, but in actual use, the short-circuit monitoring needs to be resumed after the inverter is normally started, and an abnormal condition in the circuit needs to be monitored. Therefore, after a third preset time period from the closing of the short-circuit protection circuit, the short-circuit monitoring is resumed; and the third preset time length is determined according to multiple times of historical test data. The third preset time is longer than the second preset time, and the third preset time is longer than the time for starting the inverter. The specific length of the third preset time period is not required, and is generally required to remain enough time to start the inverter, so that a proper value can be determined according to historical test data, the inverter can be ensured to be started normally, and the circuit can be prevented from being in an unmonitored state for a long time, so that serious circuit accidents occur. According to the scheme provided by the embodiment of the application, after the third preset time from the closing of the short-circuit protection circuit, the short-circuit monitoring is recovered, the monitoring on the circuit can be recovered after the inverter is started, and the circuit elements are prevented from being damaged by large current.
In the above embodiment, the length of the first preset duration is not limited, and a value of the first preset duration is related to a capacitance value of the first capacitor, and generally, the larger the capacitance value of the first capacitor is, the longer the time for the first capacitor to reach the rated voltage is, so before determining the first preset duration, the method further includes: acquiring a capacitance value of a first capacitor; determining the first preset duration includes: determining a first preset time length according to the capacitance value; wherein, the capacitance value is positively correlated with the first preset time. The short-circuit protection circuit generally needs to be closed when the voltage of the first capacitor is slightly lower than the rated voltage, so that the short-circuit protection circuit can be closed at a more accurate time point by determining the first preset time length according to the capacitance value of the first capacitor. Taking the circuit in fig. 1 as an example, in practice, the first predetermined duration may also be set according to the voltage at the two ends of the dc power supply and the resistance of the resistor.
During practical application, the second preset duration only needs to be slightly longer than the duration of BMS short circuit detection, and therefore, determining the second preset duration comprises: and determining a second preset time according to the charging time of a second capacitor in the operational amplification circuit of the BMS. The charging time of a second capacitor in the operational amplification circuit of the BMS is equivalent to the BMS short circuit detection time, and a second preset time can be determined according to the charging time of the second capacitor.
In the above embodiment, it is mentioned that the short circuit monitoring is resumed after the third preset time period from the time when the short circuit protection circuit is turned off, and in this scheme, the short circuit monitoring is resumed after the fixed time period is set, and generally, sufficient time needs to be reserved. The embodiment of the present application provides another scheme, after shielding the short circuit monitoring, further including: after the inverter start is determined, the short circuit monitoring is resumed. According to the scheme provided by the embodiment of the application, extra time does not need to be reserved, short circuit monitoring is directly recovered after the inverter is determined to be started, and the circuit can be prevented from being broken down.
In the above embodiments, the control method for starting the inverter is described in detail, and the present application also provides embodiments corresponding to the control device for starting the inverter. It should be noted that the present application describes the embodiments of the apparatus portion from two perspectives, one from the perspective of the function module and the other from the perspective of the hardware.
Based on the angle of the functional module, the present embodiment provides a control device for starting an inverter, fig. 4 is a structural diagram of the control device for starting an inverter provided in the embodiment of the present application, and as shown in fig. 4, the device includes:
the monitoring module 10 is used for monitoring short circuit of a circuit between the direct current power supply and the first capacitor; the first capacitor is a capacitor for starting the inverter.
The first starting module 11 is configured to start the short-circuit protection circuit if the current in the circuit of the dc power supply is monitored to be greater than a first threshold; the short-circuit protection circuit is a circuit for reducing the current in a loop of the direct-current power supply and the first capacitor.
The closing module 12 is configured to close the short-circuit protection circuit after a first preset time period from the start of the short-circuit protection circuit; the first preset time is less than the time for the first capacitor to reach the rated voltage.
The judging module 13 is configured to judge that the current in the circuit monitoring the dc power supply is greater than a second threshold within a second preset time period after the short-circuit protection circuit is turned off; if yes, triggering a second starting module 14; if not, the shielding module 15 is triggered. And the second preset time length is less than the time length for starting the inverter.
And a second starting module 14 for starting the short-circuit protection circuit.
And a shielding module 15 for shielding the short circuit monitoring.
Since the embodiments of the apparatus portion and the method portion correspond to each other, please refer to the description of the embodiments of the method portion for the embodiments of the apparatus portion, which is not repeated here.
The control device for starting the inverter provided by the embodiment corresponds to the method, so that the control device has the same beneficial effects as the method.
In terms of hardware, the present embodiment provides another control device for starting an inverter, fig. 5 is a structural diagram of the control device for starting an inverter according to another embodiment of the present application, and as shown in fig. 5, the control device for starting an inverter includes: a memory 20 for storing a computer program;
the processor 21, when executing the computer program, is configured to implement the steps of the control method for starting the inverter as mentioned in the above embodiments.
The control device for starting the inverter provided by the embodiment may include, but is not limited to, a smart phone, a tablet computer, a notebook computer, a desktop computer, or the like.
The processor 21 may include one or more processing cores, such as a 4-core processor, an 8-core processor, and the like. The Processor 21 may be implemented in hardware using at least one of a Digital Signal Processor (DSP), a Field-Programmable Gate Array (FPGA), and a Programmable Logic Array (PLA). The processor 21 may also include a main processor and a coprocessor, where the main processor is a processor for Processing data in an awake state, and is also called a Central Processing Unit (CPU); a coprocessor is a low power processor for processing data in a standby state. In some embodiments, the processor 21 may be integrated with a Graphics Processing Unit (GPU) which is responsible for rendering and drawing the content required to be displayed by the display screen. In some embodiments, the processor 21 may further include an Artificial Intelligence (AI) processor for processing computational operations related to machine learning.
The memory 20 may include one or more computer-readable storage media, which may be non-transitory. Memory 20 may also include high speed random access memory, as well as non-volatile memory, such as one or more magnetic disk storage devices, flash memory storage devices. In this embodiment, the memory 20 is at least used for storing a computer program 201, wherein after being loaded and executed by the processor 21, the computer program can implement the relevant steps of the control method for starting the inverter disclosed in any one of the foregoing embodiments. In addition, the resources stored in the memory 20 may also include an operating system 202, data 203, and the like, and the storage manner may be a transient storage manner or a permanent storage manner. Operating system 202 may include, among others, Windows, Unix, Linux, and the like. Data 203 may include, but is not limited to, data related to a control method of starting the inverter, and the like.
In some embodiments, the control device for starting the inverter may further include a display 22, an input/output interface 23, a communication interface 24, a power supply 25, and a communication bus 26.
It will be appreciated by those skilled in the art that the configuration shown in the figures does not constitute a limitation of the control means for starting the inverter and may comprise more or less components than those shown.
The control device for starting the inverter provided by the embodiment of the application comprises a memory and a processor, wherein when the processor executes a program stored in the memory, the following method can be realized: a control method for starting an inverter.
The control device for starting the inverter provided by the embodiment corresponds to the method, so that the control device has the same beneficial effects as the method.
Finally, the application also provides a corresponding embodiment of the computer readable storage medium. The computer-readable storage medium has stored thereon a computer program which, when being executed by a processor, carries out the steps as set forth in the above-mentioned method embodiments.
It is to be understood that if the method in the above embodiments is implemented in the form of software functional units and sold or used as a stand-alone product, it can be stored in a computer readable storage medium. Based on such understanding, the technical solution of the present application may be substantially or partially implemented in the form of a software product, which is stored in a storage medium and performs all or part of the steps of the methods described in the embodiments of the present application, or all or part of the technical solution. And the aforementioned storage medium includes: various media capable of storing program codes, such as a usb disk, a removable hard disk, a Read-Only Memory (ROM), a Random Access Memory (RAM), a magnetic disk, or an optical disk.
The computer-readable storage medium provided by the embodiment corresponds to the method, and therefore has the same beneficial effects as the method.
The control method, device and medium for starting the inverter provided by the present application are described in detail above. The embodiments are described in a progressive mode in the specification, the emphasis of each embodiment is on the difference from the other embodiments, and the same and similar parts among the embodiments can be referred to each other. The device disclosed by the embodiment corresponds to the method disclosed by the embodiment, so that the description is simple, and the relevant points can be referred to the method part for description. It should be noted that, for those skilled in the art, it is possible to make several improvements and modifications to the present application without departing from the principle of the present application, and such improvements and modifications also fall within the scope of the claims of the present application.
It should also be noted that, in this specification, relational terms such as first and second, and the like are used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other like elements in a process, method, article, or apparatus that comprises the same element.
Claims (10)
1. A control method for starting an inverter, comprising:
monitoring a short circuit between a direct current power supply and a first capacitor; the first capacitor is a capacitor for starting the inverter;
if the current in the circuit of the direct current power supply is monitored to be larger than a first threshold value, starting a short-circuit protection circuit; the short-circuit protection circuit is a circuit for reducing current in a loop of the direct-current power supply and the first capacitor;
closing the short-circuit protection circuit after a first preset time from the start of the short-circuit protection circuit; the first preset time is less than the time for the first capacitor to reach the rated voltage;
if the current in the circuit of the direct current power supply is monitored to be larger than a second threshold value within a second preset time after the short-circuit protection circuit is closed, starting the short-circuit protection circuit; the second preset time length is less than the time length for starting the inverter;
and shielding the short-circuit monitoring if the current in the circuit of the direct-current power supply is not monitored to be larger than the second threshold value within the second preset time after the short-circuit protection circuit is closed.
2. The method of claim 1, wherein after shielding the short circuit monitor, the method further comprises:
after a third preset time period from the closing of the short-circuit protection circuit, recovering the short-circuit monitoring; the third preset time is longer than the second preset time, and the third preset time is longer than the time for starting the inverter.
3. The control method for starting the inverter according to claim 2, wherein the third preset period is determined according to a plurality of times of historical test data.
4. The method of claim 1, wherein determining the first predetermined period of time is preceded by:
acquiring a capacitance value of the first capacitor;
the determining the first preset duration includes:
determining the first preset time according to the capacitance value; wherein the capacitance value is positively correlated to the first predetermined duration.
5. The control method for starting an inverter according to claim 1, wherein determining the second preset time period comprises:
and determining the second preset time according to the charging time of a second capacitor in the operational amplification circuit of the BMS.
6. The method according to any one of claims 1 to 5, wherein the short-circuit protection circuit is specifically:
the direct current power supply and the first capacitor are connected through a resistor;
the start short-circuit protection circuit includes:
and switching a circuit directly connected between the direct current power supply and the first capacitor into a circuit connected through a resistor.
7. The method of claim 1, wherein after shielding the short circuit monitor, the method further comprises:
resuming the short circuit monitoring after determining that the inverter is started.
8. A control device for starting an inverter, comprising:
the monitoring module is used for monitoring the short circuit of the circuit between the direct-current power supply and the first capacitor; wherein the first capacitor is a capacitor for starting the inverter;
the first starting module is used for starting the short-circuit protection circuit if the current in the circuit of the direct-current power supply is monitored to be larger than a first threshold value; wherein the short-circuit protection circuit is a circuit that reduces current in a loop of the direct current power supply and the first capacitor;
the closing module is used for closing the short-circuit protection circuit after a first preset time length from the start of the short-circuit protection circuit; the first preset time is less than the time for the first capacitor to reach the rated voltage;
the second starting module is used for starting the short-circuit protection circuit if the current in the circuit of the direct-current power supply is monitored to be larger than a second threshold value within a second preset time length after the short-circuit protection circuit is closed; the second preset time length is less than the time length for starting the inverter;
and the shielding module is used for shielding the short-circuit monitoring if the current in the circuit of the direct-current power supply is not monitored to be larger than the second threshold value within the second preset time after the short-circuit protection circuit is closed.
9. A control apparatus for starting an inverter, comprising a memory for storing a computer program;
a processor for implementing the steps of the control method of starting an inverter according to any one of claims 1 to 7 when executing said computer program.
10. A computer-readable storage medium, characterized in that a computer program is stored thereon, which computer program, when being executed by a processor, realizes the steps of the control method of starting an inverter according to any one of claims 1 to 7.
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| CN202210446474.3A CN114865901B (en) | 2022-04-26 | 2022-04-26 | Control method, device and medium for starting inverter |
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| CN202210446474.3A CN114865901B (en) | 2022-04-26 | 2022-04-26 | Control method, device and medium for starting inverter |
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| JP2005080456A (en) * | 2003-09-02 | 2005-03-24 | Toyota Motor Corp | Power supply |
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| CN112467814A (en) * | 2019-09-09 | 2021-03-09 | 宁波拓邦智能控制有限公司 | Battery pack discharge management method and system |
| CN214125146U (en) * | 2021-01-20 | 2021-09-03 | 合肥科威尔电源系统股份有限公司 | Capacitive load high-voltage starting current-impact-preventing circuit |
| CN215344037U (en) * | 2021-07-29 | 2021-12-28 | 深圳市鼎芯无限科技有限公司 | Battery driving circuit and lithium battery using same |
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2022
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| JP2005080456A (en) * | 2003-09-02 | 2005-03-24 | Toyota Motor Corp | Power supply |
| CN109787314A (en) * | 2019-02-19 | 2019-05-21 | 惠州拓邦电气技术有限公司 | A kind of method, apparatus and product of BMS short-circuit protection |
| CN112467814A (en) * | 2019-09-09 | 2021-03-09 | 宁波拓邦智能控制有限公司 | Battery pack discharge management method and system |
| CN214125146U (en) * | 2021-01-20 | 2021-09-03 | 合肥科威尔电源系统股份有限公司 | Capacitive load high-voltage starting current-impact-preventing circuit |
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| CN114865901B (en) | 2023-10-31 |
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