CN117154645A - Protection method for direct-current side short circuit of inverter, inverter and photovoltaic inversion system - Google Patents
Protection method for direct-current side short circuit of inverter, inverter and photovoltaic inversion system Download PDFInfo
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- CN117154645A CN117154645A CN202311079376.1A CN202311079376A CN117154645A CN 117154645 A CN117154645 A CN 117154645A CN 202311079376 A CN202311079376 A CN 202311079376A CN 117154645 A CN117154645 A CN 117154645A
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- inverter
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- short circuit
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- 238000000034 method Methods 0.000 title claims abstract description 22
- 230000004044 response Effects 0.000 claims abstract description 15
- 238000010586 diagram Methods 0.000 description 7
- 230000009471 action Effects 0.000 description 3
- 230000005611 electricity Effects 0.000 description 3
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 1
- 229910052802 copper Inorganic materials 0.000 description 1
- 239000010949 copper Substances 0.000 description 1
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Classifications
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
- H02H3/00—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition with or without subsequent reconnection ; integrated protection
- H02H3/08—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition with or without subsequent reconnection ; integrated protection responsive to excess current
- H02H3/087—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition with or without subsequent reconnection ; integrated protection responsive to excess current for dc applications
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
- H02H7/00—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions
- H02H7/10—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions for converters; for rectifiers
- H02H7/12—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions for converters; for rectifiers for static converters or rectifiers
- H02H7/122—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions for converters; for rectifiers for static converters or rectifiers for inverters, i.e. dc/ac converters
- H02H7/1225—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions for converters; for rectifiers for static converters or rectifiers for inverters, i.e. dc/ac converters responsive to internal faults, e.g. shoot-through
Abstract
The invention provides a protection method for direct-current side short circuit of an inverter, the inverter and a photovoltaic inversion system, and relates to the technical field of photovoltaics. The method comprises the following steps: judging whether each branch circuit on the direct current side has a short circuit fault by a control board in the inverter; in response to a short-circuit fault of a branch, a control board in the inverter controls breaking of direct current switches in all the junction boxes related to the inverter, wherein the direct current switches in the junction boxes are directly powered by an external control power supply. At least to solve the problems that when the dc side of the inverter has a short circuit fault, the short circuit current is usually insufficient to cause the dc side breaker to trip, and other branch currents are easy to flow backward to the short circuit branch, so as to ignite the inverter in the related art.
Description
Technical Field
The invention relates to the technical field of photovoltaics, in particular to a protection method for direct-current side short circuit of an inverter, the inverter and a photovoltaic inversion system.
Background
In a photovoltaic system, the short-circuit current of a photovoltaic cell panel is generally only 1.25 times of rated current, and when a short-circuit fault occurs on the direct-current side of an inverter, the short-circuit current is generally insufficient for enabling a circuit breaker on the direct-current side to perform tripping action; meanwhile, as most of centralized inverters are connected in parallel with multiple branches, when one branch is short-circuited, other branch currents flow backward to the short-circuited branch, and when the short-circuited current exceeds the current carrying capacity of the cable, the cable is overheated, so that the insulation of the cable fails, and further, the direct-current side positive and negative cables are ignited by arcing.
In this regard, how to avoid the above-mentioned safety problem is a problem to be solved at present.
Disclosure of Invention
The technical problem to be solved by the invention is to provide a protection method for short circuit of the DC side of an inverter, the inverter and a photovoltaic inverter system, aiming at the defects in the prior art, when the DC side of the inverter has short circuit fault, the inverter can be prevented from generating fire, and the safety of the photovoltaic inverter system is improved.
In a first aspect, the present invention provides a method for protecting a dc side short circuit of an inverter, including: judging whether each branch circuit on the direct current side has a short circuit fault by a control board in the inverter; in response to a short-circuit fault of a branch, a control board in the inverter controls breaking of direct current switches in all the junction boxes related to the inverter, wherein the direct current switches in the junction boxes are directly powered by an external control power supply.
Preferably, the control board in the inverter controls the breaking of the direct current switches in all the junction boxes related to the inverter in response to the short-circuit fault of the branch, and specifically includes: and responding to the short-circuit fault of the branch, and controlling the breaking of the direct current switches in all the busbar boxes related to the inverter by a control board in the inverter through a comprehensive display unit of the transformer, wherein the comprehensive display unit of the transformer comprises the control power supply, and the comprehensive display unit is powered by a power grid side.
Preferably, the direct current switch in the combiner box is directly powered by an external control power supply, and specifically includes: the direct current switch in the combiner box comprises a switching-off tripping coil, a control cable led out by the switching-off tripping coil is connected with an external control power supply, and the control power supply outputs alternating current or direct current.
Preferably, a control board in the inverter comprises said control power source, the control board in the inverter being supplied by the grid side. The inverter is a centralized inverter.
Preferably, the control board in the inverter determines whether each branch on the dc side has a short-circuit fault, and specifically includes: a control board in the inverter collects direct-current side voltage and each branch current; judging whether each branch circuit has short circuit fault or not according to the collected direct current side voltage and each branch circuit current.
Preferably, a control board in the inverter collects direct-current side voltage and each branch current, and specifically includes: detecting the current of each branch by a Hall sensor of each branch on the direct current side of the inverter; the control board collects the voltages of the positive bus and the negative bus at the direct current side, and collects the current of each branch detected by the Hall sensor.
Preferably, the determining whether each branch has a short circuit fault according to the collected dc side voltage and each branch current specifically includes: judging whether the branch current is negative and smaller than a first preset threshold value, and judging whether the direct-current side voltage is smaller than a second preset threshold value; and determining that the short circuit fault occurs in the branch circuit in response to the branch circuit current being negative and smaller than a first preset threshold value and the direct current side voltage being smaller than a second preset threshold value.
In a second aspect, the present invention also provides an inverter including a control board.
And the control board is used for judging whether each branch circuit on the direct current side has a short circuit fault or not, and controlling the breaking of the direct current switches in all the bus boxes related to the inverter in response to the short circuit fault of the branch circuit, wherein the direct current switches in the bus boxes are directly powered by an external control power supply.
Preferably, the control board comprises a control unit. And the control unit is used for responding to the short-circuit fault of the branch circuit, and controlling the breaking of the direct current switches in all the busbar boxes related to the inverter through the comprehensive display unit of the transformer, wherein the comprehensive display unit of the transformer comprises the control power supply, and the comprehensive display unit is powered by the power grid side.
In a third aspect, the invention further provides a photovoltaic inversion system, which comprises an inverter and at least one combiner box. An inverter connected to at least one junction box for performing a protection method of an inverter direct current side short circuit described in the first aspect.
According to the protection method for the direct-current side short circuit of the inverter, the inverter and the photovoltaic inversion system, when a short circuit fault occurs to a certain branch, the inverter directly breaks the direct-current switches in all the junction boxes related to the inverter, and when the certain branch is short-circuited, other branch currents are prevented from flowing backwards to the short-circuited branch, so that fire is caused. Meanwhile, in order to ensure that the direct current switches in all the junction boxes can be effectively disconnected, faults are effectively removed, and a control power supply outside the junction boxes directly supplies power to the direct current switches in the junction boxes, so that the faults can be prevented from being further expanded, and the safety of the photovoltaic inverter system is improved.
Drawings
Fig. 1 is a flow chart of a protection method for dc side short circuit of an inverter according to embodiment 1 of the present invention;
fig. 2 is a schematic structural diagram of a junction box according to embodiment 1 of the present invention;
fig. 3 is a schematic structural diagram of an inverter control combiner box according to embodiment 1 of the present invention;
fig. 4 is a schematic structural diagram of a control combiner box of an integrated display unit according to embodiment 1 of the present invention.
Detailed Description
In order to make the technical scheme of the present invention better understood by those skilled in the art, the following detailed description of the embodiments of the present invention will be given with reference to the accompanying drawings.
It is to be understood that the specific embodiments and figures described herein are merely illustrative of the invention, and are not limiting of the invention.
It is to be understood that the various embodiments of the invention and the features of the embodiments may be combined with each other without conflict.
It is to be understood that only the portions relevant to the present invention are shown in the drawings for convenience of description, and the portions irrelevant to the present invention are not shown in the drawings.
It should be understood that each unit and module in the embodiments of the present invention may correspond to only one physical structure, may be formed by a plurality of physical structures, or may be integrated into one physical structure.
It will be appreciated that, without conflict, the functions and steps noted in the flowcharts and block diagrams of the present invention may occur out of the order noted in the figures.
It is to be understood that the flowcharts and block diagrams of the present invention illustrate the architecture, functionality, and operation of possible implementations of systems, apparatuses, devices, methods according to various embodiments of the present invention. Where each block in the flowchart or block diagrams may represent a unit, module, segment, code, or the like, which comprises executable instructions for implementing the specified functions. Moreover, each block or combination of blocks in the block diagrams and flowchart illustrations can be implemented by hardware-based systems that perform the specified functions, or by combinations of hardware and computer instructions.
It should be understood that the units and modules related in the embodiments of the present invention may be implemented by software, or may be implemented by hardware, for example, the units and modules may be located in a processor.
Example 1:
as shown in fig. 1, the present embodiment provides a protection method for dc side short circuit of an inverter, including:
step 101, the control board in the inverter determines whether each branch on the direct current side has a short circuit fault.
Specifically, the control board in the inverter judging whether each branch on the direct current side has a short circuit fault includes: a control board in the inverter collects direct-current side voltage and each branch current; judging whether each branch circuit has short circuit fault or not according to the collected direct current side voltage and each branch circuit current.
In this embodiment, each branch on the dc side of the inverter is provided with a hall sensor, which is powered by the power grid side and is used for detecting the current of each branch, the hall sensor of each branch on the dc side of the inverter detects the current of each branch, and a control board in the inverter collects the voltages of the positive and negative bus copper bars on the dc side and the currents of each branch detected by the hall sensor. The control board in the inverter judges whether the branch current is negative and smaller than a first preset threshold value, and judges whether the direct-current side voltage is smaller than a second preset threshold value; and determining that the direct current side branch has a short circuit fault in response to the branch current being a negative value and smaller than a first preset threshold value and the direct current side voltage being smaller than a second preset threshold value.
And 102, responding to the short-circuit fault of the branch, and controlling the breaking of the direct current switches in all the junction boxes related to the inverter by a control board in the inverter, wherein the direct current switches in the junction boxes are directly powered by an external control power supply.
In this embodiment, the inverter collects the dc side voltage and the current of each branch, and determines whether a short-circuit fault occurs in a branch according to the collected result, and when the fault is confirmed, the inverter controls the dc plastic-case switch in the combiner box of each branch to be disconnected. As shown in fig. 2, a direct current plastic shell switch is installed in the combiner box, a switching-off tripping coil is installed in the direct current plastic shell switch, a control power cable of the switching-off tripping coil is led out and connected with a control power supply outside the combiner box, and the external control power supply can be alternating current or direct current. The inverter is used for judging whether each branch on the direct current side has a short circuit fault or not, and the inverter is combined to directly control the breaking of the direct current switches in all the junction boxes when the short circuit fault occurs, so that compared with the situation that whether the short circuit fault occurs or not is judged through the junction boxes, the situation that when one branch is short-circuited, the current of other branches flows backward to the short circuit branch to cause fire can be avoided. As shown in fig. 3, a plurality of junction boxes are respectively connected with an inverter, the junction boxes collect direct currents of a plurality of solar panels together, then the currents are transmitted to the inverter through cables, each junction box comprises a direct current plastic shell switch, the direct current plastic shell switch is provided with a switching-off tripping coil, the switching-off tripping coil is connected with a control board of the inverter, the control board of the inverter directly supplies power to the switching-off tripping coil of the junction box, and the control board in the inverter directly controls the breaking of the direct current switches in all junction boxes related to the inverter in response to the short circuit fault of a branch. In this embodiment, the external control power source refers to a power source component included in a control board of the inverter, that is, all the dc switches in the combiner box are directly controlled and powered by the inverter. The control panel in the inverter is supplied by the power grid side, and the inverter is a centralized inverter. The inverter of the present embodiment is a single inverter. The direct current switch power supply to the collection flow box of control panel through the dc-to-ac converter can avoid when taking place the branch road short circuit, can pull down direct current busbar voltage, leads to collection flow box power failure, and then collection flow box and the circumstances emergence of the unable reliable action of the direct current switch of collection flow box of communication interruption or collection flow box of dc-to-ac converter (can't effectively break promptly). Therefore, even if the voltage of the direct current side is reduced due to short circuit, the current collection box is controlled to lose electricity, the disconnection of the direct current switch in the current collection box can be ensured, the faults are effectively removed, and the faults are prevented from being further expanded.
Optionally, in response to the short-circuit fault occurring in the branch, the control board in the inverter controls breaking of the direct current switches in all the junction boxes related to the inverter, and specifically includes: and responding to the short-circuit fault of the branch, and controlling the breaking of the direct current switches in all the busbar boxes related to the inverter by a control board in the inverter through a comprehensive display unit of the transformer, wherein the comprehensive display unit of the transformer comprises a control power supply, and the comprehensive display unit is powered by a power grid side.
In this embodiment, as shown in fig. 4, when the inverter determines that the dc side has a short circuit fault, the control board in the inverter communicates with the integrated display unit on the transformer side, for example, the control board in the inverter communicates with the integrated display unit of the transformer through RS485, CAN bus, IO node and other communication modes, after the integrated display unit receives the fault information sent by the inverter, all the dc molded case switches in the bus box connected to the inverter are directly disconnected, the external control power refers to the power supply component included in the integrated display unit of the transformer, and the dc molded case switch opening coil in the bus box is directly powered by the integrated display unit on the transformer side, that is, all the dc switches in the bus box in this embodiment are directly controlled and powered by the integrated display unit. The direct current switch in the conflux case is directly supplied with power by the control panel of dc-to-ac converter or the comprehensive display unit of transformer, and the direct current switch is still effectively disconnected to the accessible simple power supply structure just can guarantee conflux case when losing the electricity, avoids taking place the conflagration. The inverter of this embodiment is the all-in-one, and the inverter needs to join in marriage the transformer, so has increased the block terminal, and comprehensive display unit installs in the block terminal, and the communication with the collection flow box is whole receives comprehensive display unit.
According to the protection method for the direct-current side short circuit of the inverter, when a short circuit fault occurs in a certain branch, the direct-current switches in all the junction boxes related to the inverter are directly disconnected by the inverter, so that when the certain branch is short-circuited, currents of other branches can flow backward to the short-circuited branch, and fire is caused. Meanwhile, in order to ensure that the direct current switches in all the junction boxes can be effectively disconnected, faults are effectively removed, and an external control power supply is used for directly supplying power to the direct current switches in the junction boxes, so that the faults can be prevented from being further expanded, and the safety of the photovoltaic inverter system is improved. Specifically, whether each branch on the direct current side has a short circuit fault or not is judged through the inverter, and the direct current switches in all the junction boxes are directly controlled to be disconnected when the inverter has the short circuit fault. The direct current switch power supply to the collection flow box of control panel through the dc-to-ac converter can avoid when taking place the branch road short circuit, can pull down direct current busbar voltage, leads to collection flow box power failure, and then collection flow box and the circumstances emergence of the unable reliable action of the direct current switch of collection flow box of communication interruption or collection flow box of dc-to-ac converter (can't effectively break promptly). Therefore, even if the voltage of the direct current side is reduced due to short circuit, the current collection box is controlled to lose electricity, the disconnection of the direct current switch in the current collection box can be ensured, the faults are effectively removed, and the faults are prevented from being further expanded. The direct current switch in the collection flow box is directly supplied with power by a control board of the inverter or a comprehensive display unit of the transformer, and the collection flow box can be ensured to effectively break the direct current switch when the power is lost through a simple power supply structure, so that fire disasters are avoided.
Example 2:
the embodiment provides an inverter, which comprises a control board.
And the control board is used for judging whether each branch circuit on the direct current side has a short circuit fault or not, and controlling the breaking of the direct current switches in all the bus boxes related to the inverter in response to the short circuit fault of the branch circuit, wherein the direct current switches in the bus boxes are directly powered by an external control power supply.
Optionally, the control board comprises a control unit. And the control unit is used for responding to the short-circuit fault of the branch circuit, and controlling the breaking of the direct current switches in all the busbar boxes related to the inverter through the comprehensive display unit of the transformer, wherein the comprehensive display unit of the transformer comprises a control power supply, the external control power supply can be understood to be a power supply part contained in the comprehensive display unit of the transformer, and the comprehensive display unit is powered by a power grid side. The control unit of the inverter is in communication connection with the comprehensive display unit of the transformer.
Optionally, the direct current switch in the combiner box comprises a switching-off tripping coil, and a control cable led out by the switching-off tripping coil is used for being connected with an external control power supply, wherein the control power supply is used for outputting alternating current or direct current.
Optionally, the control board in the inverter comprises a control power source, the control board in the inverter is powered by the grid side, and the inverter is a centralized inverter. The external control power supply is understood to mean the power supply components contained in the control board of the inverter.
Optionally, the control board is used for collecting direct current side voltage and current of each branch, and judging whether each branch has short circuit fault or not according to the collected direct current side voltage and current of each branch.
Optionally, the inverter includes hall sensors, the hall sensors of each branch on the dc side of the inverter are used for detecting the current of each branch, and the control board is used for collecting the voltages of the positive and negative buses on the dc side and collecting the currents of each branch detected by the hall sensors.
Optionally, the control board is used for judging whether the branch current is negative and smaller than a first preset threshold value, and judging whether the direct-current side voltage is smaller than a second preset threshold value; and determining that the branch circuit has a short circuit fault in response to the branch circuit current being negative and less than a first preset threshold and the direct current side voltage being less than a second preset threshold.
Example 3:
the embodiment provides a photovoltaic inversion system, which comprises an inverter and at least one combiner box.
An inverter connected to at least one junction box for performing a protection method of an inverter direct current side short circuit as described in embodiment 1.
As shown in fig. 3, a plurality of junction boxes are respectively connected with an inverter, the junction boxes are used for collecting direct currents of a plurality of solar panels together, then the currents are transmitted to the inverter through cables, each junction box comprises a direct current plastic shell switch, the direct current plastic shell switch is provided with a switching-off tripping coil, the switching-off tripping coil is connected with a control board of the inverter, the control board of the inverter is used for directly supplying power to the switching-off tripping coil of the junction box and directly controlling the switching-off tripping coil of the junction box, and in response to the occurrence of short-circuit faults of a branch, the control board in the inverter is used for controlling the switching-off of the direct current switches in all junction boxes related to the inverter. The control panel in the inverter comprises a control power supply, the control panel in the inverter is powered by a power grid side, and the inverter is a centralized inverter.
As shown in fig. 4, the inverter is connected with the transformer, the transformer is connected with at least one junction box, when the inverter judges that the direct current side has a short circuit fault, the control board in the inverter is communicated with the comprehensive display unit on the transformer side, for example, the control board in the inverter is communicated with the comprehensive display unit of the transformer in a communication mode of RS485, CAN bus, IO node and the like, after receiving the fault information sent by the inverter, the comprehensive display unit directly breaks all direct current plastic shell switches in the junction box connected with the inverter, and the direct current plastic shell switch-off coil in the junction box is directly powered and directly controlled by the comprehensive display unit on the transformer side.
It is to be understood that the above embodiments are merely illustrative of the application of the principles of the present invention, but not in limitation thereof. Various modifications and improvements may be made by those skilled in the art without departing from the spirit and substance of the invention, and are also considered to be within the scope of the invention.
Claims (10)
1. The protection method for the direct-current side short circuit of the inverter is characterized by comprising the following steps of:
judging whether each branch circuit on the direct current side has a short circuit fault by a control board in the inverter;
in response to a short-circuit fault of a branch, a control board in the inverter controls breaking of direct current switches in all the junction boxes related to the inverter, wherein the direct current switches in the junction boxes are directly powered by an external control power supply.
2. The method for protecting a dc side short circuit of an inverter according to claim 1, wherein the control board in the inverter controls breaking of the dc switches in all the junction boxes associated with the inverter in response to the occurrence of the short circuit fault in the branch, specifically comprising:
and responding to the short-circuit fault of the branch, and controlling the breaking of the direct current switches in all the busbar boxes related to the inverter by a control board in the inverter through a comprehensive display unit of the transformer, wherein the comprehensive display unit of the transformer comprises the control power supply, and the comprehensive display unit is powered by a power grid side.
3. The method for protecting a dc side short circuit of an inverter according to claim 2, wherein the dc switch in the combiner box is directly powered by an external control power source, specifically comprising:
the direct current switch in the combiner box comprises a switching-off tripping coil, a control cable led out by the switching-off tripping coil is connected with an external control power supply, and the control power supply outputs alternating current or direct current.
4. The method of claim 1, wherein a control board in the inverter includes the control power source, the control board in the inverter is supplied with power from a grid side,
the inverter is a centralized inverter.
5. The method for protecting a dc side short circuit of an inverter according to claim 1, wherein the control board in the inverter determines whether each branch on the dc side has a short circuit fault, specifically comprising:
a control board in the inverter collects direct-current side voltage and each branch current;
judging whether each branch circuit has short circuit fault or not according to the collected direct current side voltage and each branch circuit current.
6. The method for protecting a dc side short circuit of an inverter according to claim 5, wherein a control board in the inverter collects a dc side voltage and each branch current, and specifically comprises:
detecting the current of each branch by a Hall sensor of each branch on the direct current side of the inverter;
the control board collects the voltages of the positive bus and the negative bus at the direct current side, and collects the current of each branch detected by the Hall sensor.
7. The method for protecting a dc side short circuit of an inverter according to claim 6, wherein the determining whether each branch has a short circuit fault according to the collected dc side voltage and each branch current comprises:
judging whether the branch current is negative and smaller than a first preset threshold value, and judging whether the direct-current side voltage is smaller than a second preset threshold value;
and determining that the short circuit fault occurs in the branch circuit in response to the branch circuit current being negative and smaller than a first preset threshold value and the direct current side voltage being smaller than a second preset threshold value.
8. An inverter is characterized by comprising a control board,
and the control board is used for judging whether each branch circuit on the direct current side has a short circuit fault or not, and controlling the breaking of the direct current switches in all the bus boxes related to the inverter in response to the short circuit fault of the branch circuit, wherein the direct current switches in the bus boxes are directly powered by an external control power supply.
9. The inverter of claim 8, wherein the control board comprises a control unit,
and the control unit is used for responding to the short-circuit fault of the branch circuit, and controlling the breaking of the direct current switches in all the busbar boxes related to the inverter through the comprehensive display unit of the transformer, wherein the comprehensive display unit of the transformer comprises the control power supply, and the comprehensive display unit is powered by the power grid side.
10. A photovoltaic inversion system is characterized by comprising an inverter and at least one combiner box,
an inverter connected to at least one combiner box for performing a method of protecting dc side short circuits of an inverter according to any one of claims 1-7.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311079376.1A CN117154645A (en) | 2023-08-25 | 2023-08-25 | Protection method for direct-current side short circuit of inverter, inverter and photovoltaic inversion system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311079376.1A CN117154645A (en) | 2023-08-25 | 2023-08-25 | Protection method for direct-current side short circuit of inverter, inverter and photovoltaic inversion system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN117154645A true CN117154645A (en) | 2023-12-01 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202311079376.1A Pending CN117154645A (en) | 2023-08-25 | 2023-08-25 | Protection method for direct-current side short circuit of inverter, inverter and photovoltaic inversion system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN117154645A (en) |
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2023
- 2023-08-25 CN CN202311079376.1A patent/CN117154645A/en active Pending
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