CN-121791076-B - Method, device, equipment, medium and product for eliminating arc discharge fault

CN121791076BCN 121791076 BCN121791076 BCN 121791076BCN-121791076-B

Abstract

The embodiment of the application provides a method, a device, equipment, a medium and a product for eliminating arc discharge faults, which relate to the field of photovoltaic power generation, and the method carries out arc discharge detection and type identification by acquiring a plurality of electrical characteristic data of a photovoltaic system, pre-judges potential arc discharge and specific types thereof in advance, but does not passively wait for faults to occur, realizes potential accurate pre-judgment and timely intervention before the arc discharge faults actually occur, the problem of detection response delay in the prior art is effectively avoided from the detection link, meanwhile, based on the specific arc discharge type which is identified, the corresponding exclusive processing strategy is matched and executed for targeted adjustment, the traditional unified processing mode is abandoned, indiscriminate complex operation is not required to be executed, the whole flow of arc discharge processing is simplified, the time consumption of arc discharge processing is shortened, and the processing efficiency of arc discharge faults is improved.

Inventors

QU GUINAN
ZHOU HAO
WANG XIJIAN

Assignees

青岛海尔智能科技有限公司
星能链(江苏)能源科技有限公司

Dates

Publication Date: 20260512
Application Date: 20260303

Claims (15)

1. A method of eliminating an arc discharge fault, comprising: Acquiring a plurality of pieces of electrical characteristic data of a photovoltaic system, wherein the plurality of pieces of electrical characteristic data are used for representing the current electrical state of the photovoltaic system; If the fluctuation amplitude of each piece of electrical characteristic data is smaller than a preset fluctuation threshold value and each piece of electrical characteristic data is in a preset data range, determining a detection result as that the photovoltaic system has no arc discharge fault; If any electrical characteristic data is out of a preset data range, starting an electrical state checking flow of the photovoltaic system body, acquiring the electrical characteristic data again after disconnecting the photovoltaic system from an external power grid and shielding external electromagnetic interference, and if the acquired data still exceeds the preset data range, judging that the data abnormality is caused by the electrical state of the photovoltaic system body, and determining the detection result as that the arcing fault exists in the photovoltaic system; If the detection result is that the arc discharge fault exists in the photovoltaic system, determining an arc discharge type when the arc discharge fault exists in the photovoltaic system; Acquiring a plurality of working condition characteristic data of a photovoltaic system, and generating a plurality of photovoltaic system processing strategies according to the plurality of working condition characteristic data, wherein the plurality of working condition characteristic data comprise fault causes corresponding to each historical arc discharge type in a plurality of preset historical arc discharge types, electrical characteristic abnormal rules corresponding to each historical arc discharge type, installation configuration of the photovoltaic system and operation working condition characteristics; acquiring a target photovoltaic system processing strategy corresponding to the arc discharge type from the plurality of photovoltaic system processing strategies; and adjusting the photovoltaic system according to the target photovoltaic system processing strategy so as to eliminate arc discharge faults in the photovoltaic system.
2. The method according to claim 1, wherein the plurality of electrical characteristic data includes an impedance value, an insulation resistance value, and a potential difference, the preset data range includes a current impedance data range, a resistance value data range, and a potential difference data range, and if the fluctuation amplitude of each electrical characteristic data is smaller than a preset fluctuation threshold value and each electrical characteristic data is within a preset data range, determining that the photovoltaic system has no arcing fault as a detection result includes: If the fluctuation amplitude of each piece of electrical characteristic data is smaller than a preset fluctuation threshold value, the impedance value is in the current impedance data range, the insulation resistance value is in the resistance value data range, meanwhile, the potential difference is in the potential difference data range, the detection result is determined to be that no arcing fault exists in the photovoltaic system, wherein the impedance value refers to the impedance value of a main loop of the photovoltaic system, the insulation resistance value refers to the resistance value between the photovoltaic system and the ground, and the potential difference is used for representing the voltage difference between a plurality of circuits in the photovoltaic system.
3. The method for eliminating an arc discharge fault according to claim 2, wherein if any electrical characteristic data is outside a preset data range, and any electrical characteristic data is outside the preset data range, the method is caused by an electrical state of a photovoltaic system body, and determining the detection result as that the arc discharge fault exists in the photovoltaic system comprises: And on the basis that any electrical characteristic data is out of a preset data range and is caused by the electrical state of the photovoltaic system body, if the impedance value is out of the current impedance data range, or the insulation resistance value is out of the resistance value data range, or the potential difference is out of the potential difference data range, determining that the detection result is an arc discharge fault of the photovoltaic system.
4. The method for eliminating arc discharge faults according to claim 2, wherein the arc discharge types comprise single-type arc discharge and multi-type arc discharge, and the determining the arc discharge type when the arc discharge faults exist in the photovoltaic system if the detection result is that the arc discharge faults exist in the photovoltaic system comprises: If the number of the electrical characteristic data outside the preset data range is equal to one, determining the arc discharge type as the single type arc discharge; and if the number of the electrical characteristic data outside the preset data range is greater than one, determining the arc discharge type as the multiple types of arc discharge.
5. The method for eliminating arcing faults of claim 4, wherein the single type of arcing comprises series arcing, ground arcing, and parallel arcing, and determining the type of arcing as the single type of arcing if the number of electrical characteristic data outside a predetermined data range is equal to one comprises: If the electrical characteristic data outside the preset data range is the impedance value, determining the arc discharge type as the series arc discharge; if the electrical characteristic data outside the preset data range is the insulation resistance value, determining the arc striking type as the ground arc striking; and if the electrical characteristic data outside a preset data range is the potential difference, determining the arc discharge type as the parallel arc discharge.
6. The method for eliminating arc discharge failure according to claim 5, wherein determining the arc discharge type as the multiple types of arc discharge if the number of electrical characteristic data outside the preset data range is greater than one comprises: If the electrical characteristic data outside the preset data range are the impedance value and the insulation resistance value, determining the arc striking type as a plurality of arc striking types consisting of the series arc striking and the earth arc striking; If the electrical characteristic data outside the preset data range are the impedance value and the potential difference, determining the arc striking type as a plurality of arc striking types consisting of the series arc striking and the parallel arc striking; If the electrical characteristic data outside the preset data range are the insulation resistance value and the potential difference, determining the arc striking type as a plurality of types of arc striking consisting of the ground arc striking and the parallel arc striking; And if the electrical characteristic data outside the preset data range are the impedance value, the insulation resistance value and the potential difference, determining the arc striking type as a plurality of arc striking types consisting of the series arc striking, the ground arc striking and the parallel arc striking.
7. The method of claim 5, wherein said adjusting the photovoltaic system according to the target photovoltaic system processing strategy comprises: If the single type arc discharge is the series arc discharge, cutting off a current path of a main loop of the photovoltaic system so as to isolate the photovoltaic system; If the single type arc discharge is the earth arc discharge, limiting the output current of the photovoltaic system so as to control the output current of the photovoltaic system within a preset current range; And if the single type arc discharge is the parallel arc discharge, adjusting the potential difference of the photovoltaic system so as to adjust the potential difference of the photovoltaic system to be within the potential difference data range.
8. The method of claim 2, further comprising, prior to the acquiring the plurality of electrical characteristic data of the photovoltaic system: Acquiring a plurality of current environment parameters, a plurality of historical environment parameters and a plurality of historical impedance data ranges of an environment where the photovoltaic system is located, wherein the plurality of current environment parameters are used for representing the temperature, the humidity and the illumination intensity of the environment where the photovoltaic system is located, the plurality of historical environment parameters are used for representing the temperature, the humidity and the illumination intensity of the environment where the photovoltaic system is located at a first time point, the first time point is any time point in a preset first time period, the cut-off time of the first time period is earlier than the current time, and each historical impedance data range is used for representing the loop impedance range of the photovoltaic system at the first time point; and calculating the current impedance data range according to the current environment parameters, the historical environment parameters and the historical impedance data ranges.
9. The method of claim 8, wherein said calculating said current impedance data range from said plurality of current environmental parameters, said plurality of historical environmental parameters, and said plurality of historical impedance data ranges comprises: training a prediction model by taking the plurality of historical environment parameters and the plurality of historical impedance data ranges as training samples, wherein the prediction model is used for representing the mapping relation between the plurality of historical environment parameters and the plurality of historical impedance data ranges; And inputting the plurality of current environment parameters into the prediction model to obtain the current impedance data range.
10. The method of claim 9, wherein after adjusting the photovoltaic system according to the target photovoltaic system processing strategy to eliminate the arcing fault in the photovoltaic system, further comprising: Inquiring operation and maintenance signals corresponding to the arc type from a plurality of preset operation and maintenance signals according to the arc type, and sending the operation and maintenance signals corresponding to the arc type to a preset operation and maintenance end, wherein the operation and maintenance end is used for arranging preset operation and maintenance personnel to maintain the photovoltaic system after receiving the operation and maintenance signals.
11. The method for eliminating arc discharge fault according to claim 1, wherein the obtaining the plurality of operating condition characteristic data of the photovoltaic system and generating a plurality of photovoltaic system processing strategies according to the plurality of operating condition characteristic data comprises: Constructing a correlation mapping model according to the fault cause, the electrical characteristic abnormal rule, the installed configuration and the operation condition characteristic, wherein the installed configuration of the photovoltaic system is used for representing the physical architecture and the equipment configuration condition of the photovoltaic system, the operation condition characteristic is used for representing the actual working environment and the operation scene of the photovoltaic system, and the correlation mapping model is used for generating an adaptive arc-drawing fault processing strategy of the photovoltaic system by combining the actual state matching of the photovoltaic system; Acquiring historical processing cases of each historical arc-pulling type, and carrying out iterative optimization on the associated mapping model based on the historical processing cases to obtain an optimized associated mapping model; and inputting the plurality of electrical characteristic data into the optimized association mapping model to obtain the plurality of photovoltaic system processing strategies.
12. An arc discharge fault eliminating device, comprising: The photovoltaic system comprises a first acquisition module, a second acquisition module and a control module, wherein the first acquisition module is used for acquiring a plurality of electrical characteristic data of the photovoltaic system, and the plurality of electrical characteristic data are used for representing the current electrical state of the photovoltaic system; The first determining module is used for determining a detection result as that the photovoltaic system has no arcing fault if the fluctuation amplitude of each piece of electrical characteristic data is smaller than a preset fluctuation threshold value and each piece of electrical characteristic data is in a preset data range; The second determining module is used for starting an electrical state checking flow of the photovoltaic system body if any electrical characteristic data is out of a preset data range, acquiring the electrical characteristic data again after disconnecting the photovoltaic system from an external power grid and shielding external electromagnetic interference, and determining that the data abnormality is caused by the electrical state of the photovoltaic system body if the acquired data still exceeds the preset data range, and determining the detection result as an arc discharge fault of the photovoltaic system; the third determining module is used for determining the arc discharge type when the arc discharge fault exists in the photovoltaic system if the detection result is that the arc discharge fault exists in the photovoltaic system; The photovoltaic system comprises a first acquisition module, a second acquisition module and a control module, wherein the first acquisition module is used for acquiring a plurality of working condition characteristic data of a photovoltaic system and generating a plurality of photovoltaic system processing strategies according to the working condition characteristic data, and the working condition characteristic data comprise fault causes corresponding to each historical arc discharge type in a plurality of preset historical arc discharge types, electrical characteristic abnormal rules corresponding to each historical arc discharge type, installed configuration of the photovoltaic system and operation working condition characteristics; The third acquisition module is used for acquiring a target photovoltaic system processing strategy corresponding to the arc discharge type from the plurality of photovoltaic system processing strategies; and the adjusting module is used for adjusting the photovoltaic system according to the target photovoltaic system processing strategy so as to eliminate arc discharge faults in the photovoltaic system.
13. An electronic device comprising a processor and a memory communicatively coupled to the processor; The memory stores computer-executable instructions; The processor, when executing the computer-executable instructions stored in the memory, is configured to implement the arc fault elimination method of any one of claims 1 to 11.
14. A computer readable storage medium, wherein computer executable instructions are stored in the computer readable storage medium, which when executed by a processor, are adapted to implement the method for eliminating arc discharge faults according to any of claims 1 to 11.
15. A computer program product comprising a computer program for implementing a method of eliminating a arcing fault according to any of the claims 1-11 when executed by a processor.

Description

Method, device, equipment, medium and product for eliminating arc discharge fault Technical Field The application relates to the field of photovoltaic power generation, in particular to a method, a device, equipment, a medium and a product for eliminating arc discharge faults. Background In the operation process of the photovoltaic system, the electrical connection state and the insulation performance of the photovoltaic system are easily affected by factors such as mechanical stress, environmental corrosion, line aging and the like, electric arcs are generated among a system loop, a system and the ground or among lines in the system, the electric arcs threaten the safe operation of the photovoltaic equipment, even the safety accidents such as fire disaster, equipment damage and the like can be possibly caused, and the elimination method aiming at the arc drawing fault of the photovoltaic system becomes a key for guaranteeing the safe and efficient operation of the photovoltaic system. In the prior art, by detecting electric signals such as current harmonic distortion, voltage fluctuation and the like when a photovoltaic system operates, after detecting signals matched with arc characteristics and completing identification, an inverter main control system triggers an execution action, and a current transmission path is cut off in a mode of switching off an alternating current relay and controlling an inverter to stop, so that the elimination of arc discharge faults is completed. However, the prior art has a problem of low efficiency of eliminating the arc discharge fault. The detection response of the arc discharge faults is delayed, and the operation links of follow-up treatment are more, so that the time consumption for eliminating the whole arc discharge faults is long, and the rapid and efficient treatment of the arc discharge faults is difficult to realize. Disclosure of Invention The embodiment of the application provides a method, a device, equipment, a medium and a product for eliminating an arc discharge fault, which are used for solving the problem of low arc discharge fault elimination efficiency in the prior art. In a first aspect, an embodiment of the present application provides a method for eliminating an arc discharge fault, including: Acquiring a plurality of pieces of electrical characteristic data of a photovoltaic system, wherein the plurality of pieces of electrical characteristic data are used for representing the current electrical state of the photovoltaic system; If the fluctuation amplitude of each piece of electrical characteristic data is smaller than a preset fluctuation threshold value and each piece of electrical characteristic data is in a preset data range, determining a detection result as that the photovoltaic system has no arc discharge fault; If any electrical characteristic data is out of the preset data range and any electrical characteristic data is out of the preset data range, which is caused by the electrical state of the photovoltaic system body, determining the detection result as that the arcing fault exists in the photovoltaic system; If the detection result is that the arc discharge fault exists in the photovoltaic system, determining an arc discharge type when the arc discharge fault exists in the photovoltaic system; Acquiring a plurality of working condition characteristic data of a photovoltaic system, and generating a plurality of photovoltaic system processing strategies according to the plurality of working condition characteristic data; acquiring a target photovoltaic system processing strategy corresponding to the arc discharge type from the plurality of photovoltaic system processing strategies; and adjusting the photovoltaic system according to the target photovoltaic system processing strategy so as to eliminate arc discharge faults in the photovoltaic system. In one possible design, the plurality of electrical characteristic data includes an impedance value, an insulation resistance value, and a potential difference, the preset data range includes a current impedance data range, a resistance value data range, and a potential difference data range, and if the fluctuation amplitude of each electrical characteristic data is smaller than a preset fluctuation threshold value, and each electrical characteristic data is within a preset data range, determining the detection result as that the photovoltaic system has no arcing fault, including: If the fluctuation amplitude of each piece of electrical characteristic data is smaller than a preset fluctuation threshold value, the impedance value is in the current impedance data range, the insulation resistance value is in the resistance value data range, meanwhile, the potential difference is in the potential difference data range, the detection result is determined to be that no arcing fault exists in the photovoltaic system, wherein the impedance value refers to the impedance value of a main loop of the pho