Photovoltaic inverter fault ride-through current control parameter determination method, device and electronic equipment

Abstract

The present invention provides a method, device, and electronic device for determining fault ride-through current control parameters for a photovoltaic inverter. The method comprises: determining, for each of multiple test conditions, a first tolerance interval for reactive current simulation results and a second tolerance interval for active current simulation results under the test condition based on fault ride-through test data of the photovoltaic inverter; determining a reactive current control parameter based on the multiple first tolerance intervals; determining an active current control mode based on the multiple second tolerance intervals; and determining a target current control parameter corresponding to the photovoltaic inverter based on the reactive current control parameter and the active current control mode. This method eliminates the need for extensive iterative calculations, simplifies the process for determining the target current control parameter corresponding to the photovoltaic inverter, effectively shortens the parameter determination time, and effectively improves the efficiency of determining the photovoltaic inverter control parameters while ensuring the accuracy of the target current control parameter.

Description

Technical Field

[0001] The present invention relates to the technical field of photovoltaic power generation, and in particular to a method, device and electronic equipment for determining fault ride-through current control parameters of a photovoltaic inverter. Background Art

[0002] In recent years, the installed capacity of photovoltaic power generation systems has continued to increase, gradually becoming one of the main power sources for the power grid. The photovoltaic inverter is the core device of the photovoltaic power generation system and a key component of the new power system. Establishing an accurate photovoltaic inverter model is a key foundation for the simulation and analysis of the new power system. Currently, most photovoltaic inverter manufacturers only provide a package model of the photovoltaic inverter. The control parameters of this package model are unknown, especially the mode and parameters during fault ride-through. Therefore, it is necessary to determine the control parameters of the photovoltaic inverter during fault ride-through.

[0003] PV inverter fault ride-through testing requires consideration of the initial power level, fault type, and voltage dip or rise depth, resulting in a wide range of test conditions. Existing methods for determining PV inverter fault ride-through current control parameters rely on parameter optimization algorithms, requiring multiple iterative calculations for each test condition. This complex and time-consuming process results in inefficient determination of PV inverter control parameters. Summary of the Invention

[0004] The present invention provides a method, device and electronic equipment for determining the fault ride-through current control parameters of a photovoltaic inverter, which are used to solve the defect that the existing method for determining the fault ride-through current control parameters of a photovoltaic inverter requires multiple iterative calculations for each test condition through a parameter optimization algorithm, and the calculation process is complex and time-consuming, resulting in low efficiency in determining the photovoltaic inverter control parameters. The method does not require a large number of iterative calculations, simplifies the process of determining the target current control parameters corresponding to the photovoltaic inverter, effectively shortens the parameter determination time, and effectively improves the efficiency of determining the photovoltaic inverter control parameters while ensuring the accuracy of the target current control parameters.

[0005] The present invention provides a method for determining fault ride-through current control parameters of a photovoltaic inverter, comprising:

[0006] S1. For each test condition in a plurality of test conditions, determining, based on fault ride-through test data of a photovoltaic inverter, a first allowable deviation interval corresponding to a reactive current simulation result and a second allowable deviation interval corresponding to an active current simulation result under the test condition;

[0007] S2. Determine reactive current control parameters according to a plurality of first deviation allowable intervals;

[0008] S3. Determine an active current control mode according to a plurality of second deviation allowable intervals;

[0009] S4. Determine a target current control parameter corresponding to the photovoltaic inverter according to the reactive current control parameter and the active current control mode.

[0010] According to a method for determining fault-crossing current control parameters of a photovoltaic inverter provided by the present invention, the target current control parameters corresponding to the photovoltaic inverter are determined according to the reactive current control parameters and the active current control mode, including: S41, determining the reactive current simulation deviation according to the reactive current control parameters; and determining the active current simulation deviation according to the active current control mode; S42, when the reactive current simulation deviation does not meet the requirements of the first regulation, reducing the multiple first deviation allowable intervals according to a preset ratio to obtain multiple third deviation allowable intervals, using the multiple third deviation allowable intervals as new multiple first deviation allowable intervals, and repeating the above step S2 until the reactive current simulation deviation finally determined meets the requirements of the first regulation. Meet the requirements of the first procedure; S43. When the active current simulation deviation does not meet the requirements of the second procedure, reduce the multiple second deviation allowable intervals according to the preset ratio to obtain multiple fourth deviation allowable intervals, use the multiple fourth deviation allowable intervals as the new multiple second deviation allowable intervals, and repeat the above step S3 until the active current simulation deviation finally determined meets the requirements of the second procedure, and the first procedure requirements and the second procedure requirements both belong to the preset test procedures; S44. Determine the reactive current control parameters corresponding to the reactive current simulation deviation that meets the requirements of the first procedure, and the active current control parameters corresponding to the active current simulation deviation that meets the requirements of the second procedure as the target current control parameters.

[0011] According to a method for determining fault ride-through current control parameters of a photovoltaic inverter provided by the present invention, the method determines, based on fault ride-through test data of the photovoltaic inverter, a first deviation allowable interval corresponding to a reactive current simulation result under a test condition and a second deviation allowable interval corresponding to an active current simulation result, including: determining the electrical quantity characteristics of the photovoltaic inverter based on the fault ride-through test data; determining, based on the electrical quantity characteristics, a first average value of the reactive current test result data and a second average value of the active current test result data under the test condition; determining the first deviation allowable interval based on the first average value and a preset deviation allowable value; and determining the second deviation allowable interval based on the second average value and the preset deviation allowable value.

[0012] According to a method for determining fault ride-through current control parameters of a photovoltaic inverter provided by the present invention, the multiple test conditions include multiple low-voltage fault ride-through conditions and multiple high-voltage fault ride-through conditions, and the determining of the reactive current control parameter based on multiple first deviation allowable intervals includes: determining, from the multiple first deviation allowable intervals, low ride-through sub-intervals corresponding to each of the multiple low-voltage fault ride-through conditions, and high ride-through sub-intervals corresponding to each of the multiple high-voltage fault ride-through conditions; determining low ride-through control parameters based on the multiple low ride-through sub-intervals; and determining high ride-through control parameters based on the multiple high ride-through sub-intervals; and determining the reactive current control parameter based on the low ride-through control parameter and the high ride-through control parameter.

[0013] According to a method for determining fault ride-through current control parameters of a photovoltaic inverter provided by the present invention, the method determines the low-ride-through control parameters based on multiple low-ride-through sub-intervals, including: determining a first low-ride-through sub-interval corresponding to the current lowest voltage nominal value and a second low-ride-through sub-interval corresponding to the current highest voltage nominal value from the multiple low-ride-through sub-intervals; determining a first minimum value and a first maximum value of a reactive current droop coefficient based on the first low-ride-through sub-interval and the second low-ride-through sub-interval; determining a second maximum value of a reactive current equivalent intercept based on the first low-ride-through sub-interval and the first minimum value; and determining a second minimum value of the reactive current equivalent intercept based on the first low-ride-through sub-interval and the first maximum value; and determining the first minimum value, the first maximum value, the second maximum value, and the second minimum value as the low-ride-through control parameters.

[0014] According to a method for determining fault ride-through current control parameters of a photovoltaic inverter provided by the present invention, the electrical quantity characteristics include a fault starting time and a fault clearing time, and determining a first average value of reactive current test result data and a second average value of active current test result data under the test condition based on the electrical quantity characteristics, including: determining a first starting point of the reactive current test result data and a second starting point of the active current test result data under the test condition based on the fault starting time; determining a first ending point of the reactive current test result data and a second ending point of the active current test result data under the test condition based on the fault clearing time; determining the first average value based on the first starting point and the first ending point; and determining the second average value based on the second starting point and the second ending point.

[0015] According to a method for determining fault ride-through current control parameters of a photovoltaic inverter provided by the present invention, determining the active current control mode based on multiple second deviation allowable intervals includes: determining the active current standard deviation based on the multiple second deviation allowable intervals; determining the active current control mode based on the active current standard deviation; wherein the active current standard deviation includes a first active current standard deviation and a second active current standard deviation.

[0016] The present invention also provides a device for determining a photovoltaic inverter fault ride-through current control parameter, comprising:

[0017] The deviation allowable interval determination module is used for S1, for each test condition in multiple test conditions, determining, based on the fault ride-through test data of the photovoltaic inverter, a first deviation allowable interval corresponding to the reactive current simulation result under the test condition and a second deviation allowable interval corresponding to the active current simulation result;

[0018] The current control parameter determination module is used for S2, determining the reactive current control parameter according to multiple first deviation allowable intervals; S3, determining the active current control mode according to multiple second deviation allowable intervals; S4, determining the target current control parameter corresponding to the photovoltaic inverter according to the reactive current control parameter and the active current control mode.

[0019] The present invention also provides an electronic device, comprising a memory, a processor, and a computer program stored in the memory and executable on the processor. When the processor executes the program, the method for determining the fault ride-through current control parameters of a photovoltaic inverter as described in any one of the above is implemented.

[0020] The present invention also provides a non-transitory computer-readable storage medium having a computer program stored thereon. When the computer program is executed by a processor, the method for determining the fault ride-through current control parameters of a photovoltaic inverter as described in any one of the above is implemented.

[0021] The present invention also provides a computer program product, comprising a computer program, wherein when the computer program is executed by a processor, the method for determining the fault ride-through current control parameters of a photovoltaic inverter as described in any one of the above is implemented.

[0022] The present invention provides a method, device, and electronic device for determining fault ride-through current control parameters for a photovoltaic inverter. The method determines, for each of multiple test conditions, a first tolerance interval for reactive current simulation results and a second tolerance interval for active current simulation results based on fault ride-through test data of the photovoltaic inverter; determines reactive current control parameters based on the multiple first tolerance intervals; determines active current control modes based on the multiple second tolerance intervals; and determines target current control parameters corresponding to the photovoltaic inverter based on the reactive current control parameters and the active current control modes. This method eliminates the need for extensive iterative calculations, simplifies the process for determining the target current control parameters corresponding to the photovoltaic inverter, effectively shortens the parameter determination time, and effectively improves the efficiency of determining photovoltaic inverter control parameters while ensuring the accuracy of the target current control parameters. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] In order to more clearly illustrate the technical solutions in the present invention or the prior art, a brief introduction is given below to the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0024] Figure 1 It is a flow chart of a method for determining fault ride-through current control parameters of a photovoltaic inverter provided by the present invention;

[0025] Figure 2 is a schematic diagram of the electrical quantity characteristics provided by the present invention;

[0026] Figure 3 Schematic diagram of the allowable deviation range provided by the present invention;

[0027] Figure 4 Schematic diagram of a scenario for determining a distribution interval of reactive current control parameters provided by the present invention;

[0028] Figure 5 It is a schematic diagram of the specific results of the deviation allowance range provided by the present invention;

[0029] Figure 6 It is a schematic diagram of comparing simulation results and measured results provided by the present invention;

[0030] Figure 7 It is a structural schematic diagram of a device for determining fault ride-through current control parameters of a photovoltaic inverter provided by the present invention;

[0031] Figure 8 It is a structural schematic diagram of the electronic device provided by the present invention. DETAILED DESCRIPTION

[0032] To make the objectives, technical solutions, and advantages of the present invention more clear, the technical solutions of the present invention will be clearly and completely described below in conjunction with the accompanying drawings. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, many other embodiments obtained by ordinary technicians in this field without making creative efforts are all within the scope of protection of the present invention.

[0033] It should be noted that the voltage characteristics of a photovoltaic power generation system during a fault ride-through period depend on the system impedance, fault impedance, and fault duration. These characteristics can be achieved in a simulation system by properly setting the relevant system parameters. The fault voltage data obtained through simulation typically closely matches the test results, with various deviations far below regulatory requirements and essentially negligible. Therefore, determining the reactive and active current control parameters is sufficient.

[0034] It should be noted that the execution subject involved in the embodiment of the present invention can be a photovoltaic inverter fault ride-through current control parameter determination device or an electronic device. Optionally, the electronic device can include: a computer and a mobile terminal.

[0035] The embodiment of the present invention will be further described below by taking an electronic device as an example.

[0036] like Figure 1 FIG. 1 is a flow chart of a method for determining a photovoltaic inverter fault ride-through current control parameter provided by the present invention, which may include:

[0037] 101. For each test condition in a plurality of test conditions, determine, based on fault ride-through test data of the photovoltaic inverter, a first allowable deviation interval corresponding to a reactive current simulation result and a second allowable deviation interval corresponding to an active current simulation result under the test condition.

[0038] Among them, the test condition is used to characterize the fault ride-through period.

[0039] Fault ride-through test data refers to a set of fault ride-through test data, covering multiple test conditions, which may include multiple low-voltage fault ride-through conditions and multiple high-voltage fault ride-through conditions.

[0040] Optionally, the fault ride-through test data may include voltage test data, active current test data, reactive current test data, and the like.

[0041] For each test condition in multiple test conditions, after obtaining the fault ride-through test data of the photovoltaic inverter, the electronic device can determine the first allowable deviation range corresponding to the reactive current simulation result under the test condition and the second allowable deviation range corresponding to the active current simulation result under the test condition based on the fault ride-through test data, so as to subsequently determine the reactive current control parameters and the active current control mode.

[0042] In some embodiments, the electronic device determines a first allowable deviation interval corresponding to a reactive current simulation result and a second allowable deviation interval corresponding to an active current simulation result under a test condition based on fault ride-through test data of the photovoltaic inverter, which may include: the electronic device determines the electrical quantity characteristics of the photovoltaic inverter based on the fault ride-through test data; the electronic device determines a first average value of the reactive current test result data and a second average value of the active current test result data under the test condition based on the electrical quantity characteristics; the electronic device determines a first allowable deviation interval based on the first average value and a preset allowable deviation value; and determines a second allowable deviation interval based on the second average value and the preset allowable deviation value.

[0043] The preset allowable deviation value refers to the allowable deviation value specified in the preset test procedure.

[0044] For example, the preset test procedure may be the recommended national standard (GB / T) 32892 Photovoltaic Power Generation System Model and Parameter Test Procedure.

[0045] Optionally, the electrical quantity characteristics may include fault voltage characteristics, active current characteristics, reactive current characteristics, etc.

[0046] Optionally, the fault voltage characteristics may include: pre-fault voltage, fault voltage drop depth, post-fault voltage, fault start time, fault clearing time, fault duration, etc.

[0047] Optionally, the active current characteristics may include: active current before the fault, active current during the fault, active current recovery rate after the fault ends, and active current after system recovery, etc.

[0048] Optionally, the reactive current characteristics may include reactive current before the fault, reactive current during the fault, and reactive current after the fault ends.

[0049] The electronic device determines the electrical quantity characteristics of the photovoltaic inverter based on the fault ride-through test data. Specifically, the electronic device determines the fault voltage characteristics based on the voltage test data; determines the active current characteristics based on the active current test data; and determines the reactive current characteristics based on the reactive current test data. The process of the electronic device determining the fault voltage characteristics, active current characteristics, and reactive current characteristics is well known in the prior art and will not be described in detail here. For example, Figure 2, which is a schematic diagram of the electrical quantity characteristics provided by the present invention.

[0050] After determining the electrical quantity characteristics of the photovoltaic inverter based on the fault ride-through test data, the electronic device can determine the first average value of the reactive current test result data under the test condition and the second average value of the active current test result data under the test condition based on the electrical quantity characteristics; then, the electronic device can determine the first deviation allowable range based on the first average value and the preset deviation allowable value, and determine the second deviation allowable range based on the second average value and the preset deviation allowable value.

[0051] In some embodiments, the electrical quantity characteristics include the fault start time and the fault clearing time, and the electronic device determines the first average value of the reactive current test result data and the second average value of the active current test result data under the test condition based on the electrical quantity characteristics, which may include: the electronic device determines the first starting point of the reactive current test result data and the second starting point of the active current test result data under the test condition based on the fault start time; the electronic device determines the first ending point of the reactive current test result data and the second ending point of the active current test result data under the test condition based on the fault clearing time; the electronic device determines the first average value based on the first starting point and the first ending point; the electronic device determines the second average value based on the second starting point and the second ending point.

[0052] It should be noted that the electronic device is not limited to the timing for determining the first average value and the second average value.

[0053] Example 1: Assuming that the current test condition corresponds to the jth (j≥1) fault ride-through period, the first average value of the reactive current test result data of the PV inverter during the jth fault ride-through period is And the second average value of active current test result data The calculation formulas are:

[0054]

[0055]

[0056] Among them, j can be understood as the fault test number; i represents the number of the reactive current test result data; K start Indicates the first starting point; K end Indicates the first end point; I qm_j (i) represents the i-th reactive current test result data during the j-th fault ride-through period; i′ represents the number of the active current test result data; K start Indicates the second starting point; K end Indicates the second end point; I dm_j(i′) represents the i′th active current test result data during the jth fault ride-through period.

[0057] Optional, K start and K start Can be the same or different; K end and K end They can be the same or different and are not specifically limited here.

[0058] The electronic device can determine the fault duration according to the fault start time and the fault clearing time. Within the fault duration, the first starting point of the reactive current test result data and the second starting point of the active current test result data under the test condition are determined with the fault start time as the starting limit; the first ending point of the reactive current test result data and the second ending point of the active current test result data under the test condition are determined with the fault clearing time as the ending limit; then, the electronic device can determine the first average value of the reactive current test result data under the test condition according to the first starting point and the first ending point using the above formula (1). At the same time, the electronic device can determine the second average value of the active current test result data under the test condition according to the second starting point and the second ending point using the above formula (2). In order to subsequently determine the first deviation allowable interval and the second deviation allowable interval.

[0059] Combined with Example 1 and Example 2, during the jth fault ride-through period of the photovoltaic inverter, the calculation formulas for the first allowable deviation range corresponding to the reactive current simulation result and the second allowable deviation range corresponding to the active current simulation result are respectively:

[0060]

[0061]

[0062] Wherein, σ1 represents the preset deviation allowable value; I qs (j) represents the reactive current simulation result of the PV inverter during the jth fault ride-through period; I ds (j) represents the simulation results of the active current of the PV inverter during the jth fault ride-through.

[0063] For example, Figure 3 , which is a schematic diagram of the deviation allowable range provided by the present invention. Figure 3 In FIG, fault test number j = 1, 2, ..., 8, corresponding to 8 test conditions respectively. The first 5 test conditions are all low voltage fault ride-through conditions, and the last 3 test conditions are all high voltage fault ride-through conditions.

[0064] 102. Determine reactive current control parameters according to multiple first deviation allowable intervals.

[0065] After determining a plurality of first allowable deviation intervals, the electronic device may determine a reactive current control parameter according to the plurality of first allowable deviation intervals, so as to subsequently determine a target current control parameter corresponding to the photovoltaic inverter.

[0066] In some embodiments, the multiple test conditions include multiple low-voltage fault ride-through conditions and multiple high-voltage fault ride-through conditions, and the electronic device determines the reactive current control parameter based on multiple first deviation allowable intervals, which may include: the electronic device determines, from the multiple first deviation allowable intervals, low-ride-through sub-intervals corresponding to the multiple low-voltage fault ride-through conditions and high-ride-through sub-intervals corresponding to the multiple high-voltage fault ride-through conditions; the electronic device determines the low-ride-through control parameter based on the multiple low-ride-through sub-intervals; and determines the high-ride-through control parameter based on the multiple high-ride-through sub-intervals; the electronic device determines the reactive current control parameter based on the low-ride-through control parameter and the high-ride-through control parameter.

[0067] Among them, the low voltage fault ride-through condition is used to characterize that the photovoltaic inverter is in the low voltage fault ride-through period at this time; the high voltage fault ride-through condition is used to characterize that the photovoltaic inverter is in the high voltage fault ride-through period at this time.

[0068] by Figure 3 For example, the electronic device determines the low-voltage fault ride-through sub-intervals corresponding to the five low-voltage fault ride-through conditions from the eight first deviation allowable intervals, which can be expressed as: The high voltage fault ride-through sub-intervals corresponding to the three high voltage fault ride-through conditions are determined, which can be expressed as:

[0069]

[0070] Next, the electronic device may determine the low-pass control parameter according to the multiple low-pass sub-intervals, and may determine the high-pass control parameter according to the multiple high-pass sub-intervals, and further determine the reactive current control parameter.

[0071] In some embodiments, the electronic device determines the low-through control parameters based on multiple low-through sub-intervals, which may include: the electronic device determines the first low-through sub-interval corresponding to the current lowest voltage nominal value and the second low-through sub-interval corresponding to the current highest voltage nominal value from the multiple low-through sub-intervals; the electronic device determines the first minimum value and the first maximum value of the reactive current droop coefficient based on the first low-through sub-interval and the second low-through sub-interval; the electronic device determines the second maximum value of the reactive current equivalent intercept based on the first low-through sub-interval and the first minimum value; and determines the second minimum value of the reactive current equivalent intercept based on the first low-through sub-interval and the first maximum value; the electronic device determines the first minimum value, the first maximum value, the second maximum value and the second minimum value as the low-through control parameters.

[0072] by Figure 3For example, the electronic device determines the current lowest voltage nominal value U from the 5 low-pass sub-intervals. t1 The corresponding first low-penetrating interval is And determine the current maximum voltage nominal value U t5 The corresponding second low penetration interval is

[0073]

[0074] Then, after determining the first low-passing sub-interval and the second low-passing sub-interval, the electronic device can And the lower limit of the second low penetration interval Determine the first minimum value k2 of the reactive current droop coefficient; at the same time, the electronic device can be based on the lower limit value of the first low-pass sub-interval And the upper limit of the second lowest penetration interval A first maximum value k1 of the reactive current droop factor is determined.

[0075] The calculation formulas for the first minimum value k2 and the first maximum value k1 are:

[0076]

[0077]

[0078] Then, the electronic device can be configured to detect the upper limit of the first low-pass interval. and the first minimum value k2, determine the second maximum value I of the reactive current equivalent intercept qset2 ; and according to the lower limit of the first low-crossing sub-interval and the first maximum value k1, determine the second minimum value I of the reactive current equivalent intercept qset1 .

[0079] Among them, the second maximum value I qset2 and the second minimum value I qset1 The calculation formulas are:

[0080]

[0081]

[0082] Then, the electronic device sets the first minimum value k2, the first maximum value k1, and the second maximum value I qset2 and the second minimum value I qset1 , determined as the low penetration control parameter.

[0083] It should be noted that the above k2, k1, I qset2 and I qset1This can form a distribution interval for the reactive current control parameters of the PV inverter during low-voltage fault ride-through. That is, during low-voltage fault ride-through, as long as the reactive current droop coefficient and reactive current equivalent intercept of the PV inverter fall within this distribution interval, the reactive current simulation results can meet the requirements of the preset test procedures.

[0084] Optionally, the electronic device determines the high-penetration control parameters based on multiple high-penetration sub-intervals, which may include: the electronic device determines the first high-penetration sub-interval corresponding to the current lowest voltage nominal value, and the second high-penetration sub-interval corresponding to the current highest voltage nominal value from the multiple high-penetration sub-intervals; the electronic device determines the third minimum value and the third maximum value of the reactive current droop coefficient based on the first high-penetration sub-interval and the second high-penetration sub-interval; the electronic device determines the fourth maximum value of the reactive current equivalent intercept based on the first high-penetration sub-interval and the third minimum value; and determines the fourth minimum value of the reactive current equivalent intercept based on the first high-penetration sub-interval and the third maximum value; the electronic device determines the third minimum value, the third maximum value, the fourth maximum value and the fourth minimum value as the high-penetration control parameters.

[0085] by Figure 3 For example, the electronic device determines the current lowest voltage nominal value U from the three high-voltage sub-intervals. t6 The corresponding first high-penetrating interval is And determine the current maximum voltage nominal value U t8 The corresponding second highest penetration interval is

[0086]

[0087] Then, after determining the first high penetration sub-interval and the second high penetration sub-interval, the electronic device can And the lower limit of the second highest penetration interval Determine the third minimum value k4 of the reactive current droop coefficient; at the same time, the electronic device can be based on the lower limit value of the first high-pass sub-interval And the upper limit of the second highest penetration interval A third maximum value k3 of the reactive current droop factor is determined.

[0088] The calculation formulas for the third minimum value k4 and the third maximum value k3 are respectively:

[0089]

[0090]

[0091] Then, the electronic device can be configured to receive the upper limit value of the first high-pass sub-interval. and the third minimum value k4, determine the fourth maximum value I of the reactive current equivalent intercept qset4; and according to the lower limit of the first high penetration interval and the third maximum value k3, determine the fourth minimum value I of the reactive current equivalent intercept qset3 .

[0092] Among them, the fourth maximum value I qset4 and the fourth minimum value I qset3 The calculation formulas are:

[0093]

[0094]

[0095] Then, the electronic device sets the third minimum value k4, the third maximum value k3, and the fourth maximum value k4 to the maximum value k3. qset4 and the fourth minimum value I qset3 , determined as the high penetration control parameter.

[0096] It should be noted that the above k4, k3, I qset4 and I qset3 This can form a distribution interval for the reactive current control parameters of the PV inverter during high-voltage fault ride-through. That is, during high-voltage fault ride-through, as long as the reactive current droop coefficient and reactive current equivalent intercept of the PV inverter fall within this distribution interval, the reactive current simulation results can meet the requirements of the preset test procedures.

[0097] For example, Figure 4 , which is a schematic diagram of a scenario for determining the distribution interval of reactive current control parameters provided by the present invention. Figure 4 In the figure, for the low-voltage fault ride-through period of the photovoltaic inverter: A1~A4 respectively represent the four measured values ​​of the reactive current, B1~B4 and C1~C4 are the eight deviation allowable boundary values ​​of the reactive current obtained by the electronic equipment based on multiple low-voltage ride-through sub-intervals, and these eight deviation allowable boundary values ​​can constitute the reactive current deviation allowable region during the low-voltage fault ride-through period. Furthermore, the electronic equipment can determine the distribution range of the reactive current control parameter during the low-voltage fault ride-through period; for the high-voltage fault ride-through period of the photovoltaic inverter: A5~A7 respectively represent the three measured values ​​of the reactive current, B5~B7 and C5~C7 are the six deviation allowable boundary values ​​of the reactive current obtained by the electronic equipment based on multiple high-voltage ride-through sub-intervals. These six deviation allowable boundary values ​​can constitute the reactive current deviation allowable region during the high-voltage fault ride-through period. Furthermore, the electronic equipment can determine the distribution range of the reactive current control parameter during the high-voltage fault ride-through period.

[0098] Optionally, the electronic device determines the reactive current control parameter based on the low-voltage fault ride-through control parameter and the high-voltage fault ride-through control parameter, which may include: during the low-voltage fault ride-through period, the electronic device determines the first average value of the reactive current droop coefficient based on the first minimum value and the first maximum value; and determines the second average value of the reactive current equivalent intercept based on the second maximum value and the second minimum value; during the high-voltage fault ride-through period, the electronic device determines the third average value of the reactive current droop coefficient based on the third minimum value and the third maximum value; and determines the fourth average value of the reactive current equivalent intercept based on the fourth maximum value and the fourth minimum value; the electronic device determines the first average value, the second average value, the third average value and the fourth average value as the reactive current control parameter.

[0099] Exemplarily, during the low voltage fault ride-through period, the calculation formula for the first average value of the reactive current droop coefficient is:

[0100]

[0101] During low voltage fault ride-through, the second average value of the reactive current equivalent intercept is calculated as:

[0102]

[0103] During high voltage fault ride-through, the third average value of the reactive current droop coefficient is calculated as follows:

[0104]

[0105] During high voltage fault ride-through, the fourth average value of the reactive current equivalent intercept is calculated as:

[0106]

[0107] In this way, the electronic device can use the first average value k LVRT , the second average value I qset_LVRT , the third average k HVRT and the fourth average value I qset_HVRT , determined as the reactive current control parameter.

[0108] 103. Determine an active current control mode according to a plurality of second deviation allowable intervals.

[0109] After determining the plurality of second allowable deviation intervals, the electronic device may determine an active current control mode according to the plurality of second allowable deviation intervals, so as to subsequently determine a target current control parameter corresponding to the photovoltaic inverter.

[0110] In some embodiments, the electronic device determines the active current control mode based on multiple second deviation allowable intervals, which may include: the electronic device determines the active current standard deviation based on multiple second deviation allowable intervals; the electronic device determines the active current control mode based on the active current standard deviation; wherein the active current standard deviation includes a first active current standard deviation and a second active current standard deviation.

[0111] It should be noted that the active current standard deviation refers to the active current standard deviation during the low voltage fault ride-through period.

[0112] Generally, the active current control mode of the photovoltaic inverter during fault ride-through is mainly divided into two modes: active current constant control mode and reactive current priority output control mode, which can be determined according to the active current standard deviation.

[0113] by Figure 3 For example, the electronic device determines the low-voltage fault ride-through sub-intervals corresponding to the first five low-voltage fault ride-through conditions from the eight second deviation allowable intervals, and then obtains the average active current I during the low-voltage fault ride-through period. dm_ave , I dm_ave The calculation formula is:

[0114]

[0115] Then, the calculation formula for the first active current standard deviation is:

[0116]

[0117] If the first active current standard deviation satisfies σ Id1 ≤0.1, indicating that the PV inverter adopts the active current constant control mode during the low voltage fault ride-through period. The active current I d Equal to the active current before the fault I d0 , that is I d =I d0 ; If the first active current standard deviation satisfies σ Id1 >0.1, it means that the photovoltaic inverter may adopt the reactive current priority output control mode. Id1 When >0.1, calculate the second active current standard deviation.

[0118] The electronic device obtains the second active current standard deviation σ based on the 5 low-through sub-intervals in the 8 second deviation allowable intervals and the 5 low-through sub-intervals in the 8 first deviation allowable intervals. Id2 The calculation formula is:

[0119]

[0120] Among them, I maxIndicates the maximum allowable current value of the photovoltaic inverter.

[0121] If the second active current standard deviation satisfies σ Id2 ≤0.1, it means that the photovoltaic inverter adopts the reactive current priority output control mode during the low voltage fault ride-through period; if the second active current standard deviation meets σ Id2 >0.1, indicating that the photovoltaic inverter does not adopt the reactive current priority output control mode or the active current constant control mode during the low voltage fault ride-through period, and may adopt other active current control modes. At this time, it is necessary to determine the active current control parameter. The electronic device determines the active current control parameter based on the multiple second deviation allowable intervals. The process of the electronic device determining the active current control parameter is similar to the process of the electronic device determining the reactive current control parameter, and is not described in detail here.

[0122] 104. Determine a target current control parameter corresponding to the photovoltaic inverter according to the reactive current control parameter and the active current control mode.

[0123] After determining the reactive current control parameters and active current control mode, the electronic device can determine the target current control parameters for the PV inverter. This eliminates the need for extensive iterative calculations, simplifying the process and effectively shortening the parameter determination process. This ensures the accuracy of the target current control parameters while improving the efficiency of determining the PV inverter's control parameters.

[0124] In some embodiments, the electronic device determines the target current control parameters corresponding to the photovoltaic inverter based on the reactive current control parameters and the active current control mode, which may include: 1041. The electronic device determines the reactive current simulation deviation based on the reactive current control parameters; and determines the active current simulation deviation based on the active current control mode; 1042. When the reactive current simulation deviation does not meet the requirements of the first regulation, the electronic device reduces the multiple first deviation allowable intervals according to a preset ratio to obtain multiple third deviation allowable intervals, uses the multiple third deviation allowable intervals as new multiple first deviation allowable intervals, and repeats the above step 102 until the reactive current simulation deviation finally determined meets the requirements of the first regulation. ; 1043. When the active current simulation deviation does not meet the requirements of the second regulation, the electronic device reduces the multiple second deviation allowable intervals according to a preset ratio to obtain multiple fourth deviation allowable intervals, uses the multiple fourth deviation allowable intervals as new multiple second deviation allowable intervals, and repeats the above step 103 until the active current simulation deviation finally determined meets the requirements of the second regulation, and the first regulation requirements and the second regulation requirements both belong to the preset test regulations; 1044. The electronic device determines the reactive current control parameters corresponding to the reactive current simulation deviation that meets the requirements of the first regulation, and the active current control parameters corresponding to the active current simulation deviation that meets the requirements of the second regulation as the target current control parameters.

[0125] Among them, the first regulation requirement is the regulation requirement for reactive current simulation deviation in the preset test procedure; the second regulation requirement is the regulation requirement for active current simulation deviation in the preset test procedure.

[0126] For example, the preset ratio may be 10%.

[0127] In the process of determining the target current control parameters, the electronic device sets the simulation conditions one by one according to the actual test conditions based on the reactive current control parameters, and performs simulation calculations, and evaluates the photovoltaic inverter model deviation according to the preset test procedures to obtain the reactive current simulation deviation; at the same time, the electronic device sets the simulation conditions one by one according to the actual test conditions based on the active current control mode, and performs simulation calculations, and evaluates the photovoltaic inverter model deviation according to the preset test procedures to obtain the active current simulation deviation.

[0128] If the reactive current simulation deviation does not meet the requirements of the first regulation, the electronic device will reduce the multiple first deviation allowable intervals according to a preset ratio to obtain multiple third deviation allowable intervals, use the multiple third deviation allowable intervals as new multiple first deviation allowable intervals, and repeat the above step 102 until the reactive current simulation deviation finally determined meets the requirements of the first regulation.

[0129] If the active current simulation deviation does not meet the requirements of the second regulation, the electronic device will reduce the multiple second deviation allowable intervals according to a preset ratio to obtain multiple fourth deviation allowable intervals, use the multiple fourth deviation allowable intervals as new multiple second deviation allowable intervals, and repeat the above step 103 until the active current simulation deviation finally determined meets the requirements of the second regulation.

[0130] The electronic device determines the reactive current control parameter corresponding to the reactive current simulation deviation that meets the requirements of the first regulation and the active current control parameter corresponding to the active current simulation deviation that meets the requirements of the second regulation as the target current control parameter.

[0131] In an embodiment of the present invention, for each of multiple test conditions, based on the fault ride-through test data of the photovoltaic inverter, a first deviation allowable interval corresponding to the reactive current simulation result and a second deviation allowable interval corresponding to the active current simulation result under the test condition are determined; based on the multiple first deviation allowable intervals, a reactive current control parameter is determined; based on the multiple second deviation allowable intervals, an active current control mode is determined; and based on the reactive current control parameter and the active current control mode, a target current control parameter corresponding to the photovoltaic inverter is determined. This method does not require a large number of iterative calculations, simplifies the process of determining the target current control parameter corresponding to the photovoltaic inverter, effectively shortens the parameter determination time, and effectively improves the efficiency of determining the photovoltaic inverter control parameter while ensuring the accuracy of the target current control parameter.

[0132] The embodiments of the present invention are further described with reference to the following examples:

[0133] Taking a photovoltaic inverter with a rated voltage of 0.69 kilovolts (kV) and a capacity of 3.2 megavolt-amperes (MVA) as an example, the specific steps for determining the photovoltaic inverter's fault ride-through current control parameters are as follows:

[0134] Step 1: The electronic equipment determines the electrical characteristics of the photovoltaic inverter based on the fault ride-through test data.

[0135] Step 2: Use the formula (1) and formula (2) mentioned above to determine the first average value and the second average value respectively. The specific result of the first average value corresponds to Figure 2 The specific result of the second average value corresponds to the data in the column where the reactive current is located during the fault period. Figure 2 Then, using the formula (3) and formula (4) mentioned above, the first deviation allowable interval and the second deviation allowable interval are determined respectively. For example, Figure 5 , which is a schematic diagram of the specific results of the deviation allowable range provided by the present invention.

[0136] Step 3: Figure 5For example, based on the above formulas (5) to (8), the first minimum value, the first maximum value, the second maximum value and the second minimum value are determined respectively. It should be noted that, Figure 5 It can be seen that the fifth test condition did not enter the low voltage fault ride-through condition, which means that among the eight test conditions, the first four test conditions are all low voltage fault ride-through conditions, and the last three test conditions are all high voltage fault ride-through conditions.

[0137] At this time, the first minimum

[0138] First maximum value

[0139] The second maximum

[0140] Second minimum

[0141] At the same time, the third minimum value, the third maximum value, the fourth maximum value and the fourth minimum value are determined respectively using the above-mentioned formulas (9) to (12).

[0142] Specifically, the third minimum

[0143] The third maximum

[0144] The fourth maximum

[0145] Fourth minimum

[0146] Next, the first average value, the second average value, the third average value, and the fourth average value are determined respectively using the above-mentioned formulas (13) to (16).

[0147] Specifically, the first average

[0148] Second average

[0149] The third average

[0150] Fourth average

[0151] In this way, the electronic device can use the first average value k LVRT , the second average value I qset_LVRT , the third average k HVRT and the fourth average value I qset_HVRT , determined as the reactive current control parameter.

[0152] Step 4: Using the above formula (17) and formula (18), determine the average value of the active current and the first standard deviation of the active current during the low voltage fault ride-through period, respectively.

[0153] Specifically, the average active current

[0154] The first active current standard deviation It can be seen that the first active current standard deviation satisfies σ Id1 ≤0.1, indicating that the PV inverter adopts the active current constant control mode during the low voltage fault ride-through period, then I d =I d0 .

[0155] Step 5: Determine the target current control parameter corresponding to the photovoltaic inverter based on the reactive current control parameter and the active current control mode. The specific steps are the same as those in step 104 above and will not be described in detail here.

[0156] For example, as shown in Table 1, it is a performance comparison table provided by the present invention.

[0157] Table 1:

[0158]

[0159] As can be seen from Table 1, compared with the prior art, although the maximum deviation of the reactive current of the method proposed in the present invention is larger, it does not require a large number of iterative calculations, simplifies the process of determining the target current control parameters corresponding to the photovoltaic inverter, effectively shortens the parameter determination time, and effectively improves the efficiency of determining the photovoltaic inverter control parameters while ensuring the accuracy of the target current control parameters.

[0160] For example, Figure 6 The figure shows a schematic diagram of the comparison between the simulation results and the measured results provided by the present invention. Figure 6 It can be seen from the figure that under typical working conditions, the photovoltaic inverter model simulation is performed based on the relatively accurate target current control parameters determined by the method proposed in the present invention, and the obtained simulation results have a smaller error than the measured results.

[0161] The photovoltaic inverter fault ride-through current control parameter determination device provided by the present invention is described below. The photovoltaic inverter fault ride-through current control parameter determination device described below and the photovoltaic inverter fault ride-through current control parameter determination method described above can refer to each other.

[0162] like Figure 7 FIG. 1 is a schematic diagram of a structure of a device for determining a photovoltaic inverter fault ride-through current control parameter provided by the present invention, which may include:

[0163] The deviation allowable interval determination module 701 is used to determine, for each test condition in a plurality of test conditions, a first deviation allowable interval corresponding to a reactive current simulation result and a second deviation allowable interval corresponding to an active current simulation result under the test condition based on fault ride-through test data of the photovoltaic inverter;

[0164] The current control parameter determination module 702 is used for S2, determining the reactive current control parameter based on multiple first deviation allowable intervals; S3, determining the active current control mode based on multiple second deviation allowable intervals; S4, determining the target current control parameter corresponding to the photovoltaic inverter based on the reactive current control parameter and the active current control mode.

[0165] Optionally, the current control parameter determination module 702 is specifically used for S41, determining the reactive current simulation deviation according to the reactive current control parameter; and determining the active current simulation deviation according to the active current control mode; S42, when the reactive current simulation deviation does not meet the requirements of the first regulation, reducing the multiple first deviation allowable intervals according to a preset ratio to obtain multiple third deviation allowable intervals, using the multiple third deviation allowable intervals as new multiple first deviation allowable intervals, and repeating the above step S2 until the reactive current simulation deviation finally determined meets the requirements of the first regulation; S43, when the active current simulation deviation does not meet the requirements of the first regulation Under the requirements of the second procedure, the multiple second deviation allowable intervals are reduced according to the preset ratio to obtain multiple fourth deviation allowable intervals, and the multiple fourth deviation allowable intervals are used as the new multiple second deviation allowable intervals, and the above step S3 is repeated until the active current simulation deviation finally determined meets the requirements of the second procedure, and the first procedure requirements and the second procedure requirements both belong to the preset test procedures; S44, the reactive current control parameters corresponding to the reactive current simulation deviation that meets the requirements of the first procedure, and the active current control parameters corresponding to the active current simulation deviation that meets the requirements of the second procedure, are determined as the target current control parameters.

[0166] Optionally, the deviation allowable interval determination module 701 is specifically used to determine the electrical quantity characteristics of the photovoltaic inverter based on the fault ride-through test data; determine the first average value of the reactive current test result data and the second average value of the active current test result data under the test condition based on the electrical quantity characteristics; determine the first deviation allowable interval based on the first average value and the preset deviation allowable value; and determine the second deviation allowable interval based on the second average value and the preset deviation allowable value.

[0167] Optionally, the multiple test conditions include multiple low-voltage fault ride-through conditions and multiple high-voltage fault ride-through conditions, and the current control parameter determination module 702 is specifically used to determine the low-ride-through sub-intervals corresponding to the multiple low-voltage fault ride-through conditions and the high-ride-through sub-intervals corresponding to the multiple high-voltage fault ride-through conditions from the multiple first deviation allowable intervals; determine the low-ride-through control parameters based on the multiple low-ride-through sub-intervals; and determine the high-ride-through control parameters based on the multiple high-ride-through sub-intervals; and determine the reactive current control parameters based on the low-ride-through control parameters and the high-ride-through control parameters.

[0168] Optionally, the current control parameter determination module 702 is specifically used to determine, from the multiple low-penetration sub-intervals, a first low-penetration sub-interval corresponding to the current lowest voltage nominal value, and a second low-penetration sub-interval corresponding to the current highest voltage nominal value; determine a first minimum value and a first maximum value of the reactive current droop coefficient based on the first low-penetration sub-interval and the second low-penetration sub-interval; determine a second maximum value of the reactive current equivalent intercept based on the first low-penetration sub-interval and the first minimum value; and determine a second minimum value of the reactive current equivalent intercept based on the first low-penetration sub-interval and the first maximum value; and determine the first minimum value, the first maximum value, the second maximum value and the second minimum value as the low-penetration control parameter.

[0169] Optionally, the electrical quantity characteristics include the fault start time and the fault clearing time, and the deviation allowable interval determination module 701 is specifically used to determine the first starting point of the reactive current test result data and the second starting point of the active current test result data under the test condition according to the fault start time; determine the first ending point of the reactive current test result data and the second ending point of the active current test result data under the test condition according to the fault clearing time; determine the first average value according to the first starting point and the first ending point; and determine the second average value according to the second starting point and the second ending point.

[0170] Optionally, the current control parameter determination module 702 is specifically used to determine the active current standard deviation based on the multiple second deviation allowable intervals; determine the active current control mode based on the active current standard deviation; wherein the active current standard deviation includes a first active current standard deviation and a second active current standard deviation.

[0171] like Figure 8, is a schematic structural diagram of an electronic device provided by the present invention, which may include: a processor 810, a communication interface 820, a memory 830, and a communication bus 840, wherein the processor 810, the communication interface 820, and the memory 830 communicate with each other via the communication bus 840. The processor 810 may call logic instructions in the memory 830 to execute a method for determining fault ride-through current control parameters for a photovoltaic inverter, the method comprising: S1, for each of a plurality of test conditions, determining, based on fault ride-through test data of the photovoltaic inverter, a first allowable deviation interval corresponding to a reactive current simulation result under the test condition and a second allowable deviation interval corresponding to an active current simulation result; S2, determining a reactive current control parameter based on the plurality of first allowable deviation intervals; S3, determining an active current control mode based on the plurality of second allowable deviation intervals; and S4, determining a target current control parameter corresponding to the photovoltaic inverter based on the reactive current control parameter and the active current control mode.

[0172] In addition, the logic instructions in the above-mentioned memory 830 can be implemented in the form of a software functional unit and can be stored in a computer-readable storage medium when sold or used as an independent product. Based on this understanding, the technical solution of the present invention, or the part that contributes to the prior art, or the part of the technical solution, can be embodied in the form of a software product. The computer software product is stored in a storage medium and includes several instructions for enabling a computer device (which can be a personal computer, server, or network device, etc.) to perform all or part of the steps of the method described in each embodiment of the present invention. The aforementioned storage medium includes: U disk, mobile hard disk, read-only memory (ROM), random access memory (RAM), disk or optical disk, and other media that can store program code.

[0173] On the other hand, the present invention also provides a computer program product, which includes a computer program, and the computer program can be stored on a non-transitory computer-readable storage medium. When the computer program is executed by a processor, the computer can execute the photovoltaic inverter fault ride-through current control parameter determination method provided by the above methods, the method including: S1, for each test condition in a plurality of test conditions, according to the fault ride-through test data of the photovoltaic inverter, determining the first deviation allowable interval corresponding to the reactive current simulation result under the test condition and the second deviation allowable interval corresponding to the active current simulation result; S2, determining the reactive current control parameter based on the plurality of first deviation allowable intervals; S3, determining the active current control mode based on the plurality of second deviation allowable intervals; S4, determining the target current control parameter corresponding to the photovoltaic inverter based on the reactive current control parameter and the active current control mode.

[0174] On the other hand, the present invention also provides a non-transitory computer-readable storage medium having a computer program stored thereon, which, when executed by a processor, is implemented to execute the photovoltaic inverter fault ride-through current control parameter determination method provided by the above-mentioned methods, the method comprising: S1, for each test condition in a plurality of test conditions, determining, according to the fault ride-through test data of the photovoltaic inverter, a first deviation allowable interval corresponding to the reactive current simulation result under the test condition and a second deviation allowable interval corresponding to the active current simulation result; S2, determining the reactive current control parameter according to the plurality of first deviation allowable intervals; S3, determining the active current control mode according to the plurality of second deviation allowable intervals; S4, determining the target current control parameter corresponding to the photovoltaic inverter according to the reactive current control parameter and the active current control mode.

[0175] The device embodiments described above are merely illustrative. The units described as separate components may or may not be physically separate, and the components shown as units may or may not be physical units, i.e., they may be located in one location or distributed across multiple network units. Some or all of the modules may be selected based on actual needs to achieve the objectives of the present embodiment. Persons of ordinary skill in the art will be able to understand and implement the present invention without inventive effort.

[0176] Through the description of the above embodiments, those skilled in the art can clearly understand that each embodiment can be implemented by means of software plus a necessary general hardware platform, or of course, by hardware. Based on this understanding, the essence of the above technical solution or the part that contributes to the existing technology can be embodied in the form of a software product. The computer software product can be stored in a computer-readable storage medium, such as ROM / RAM, a magnetic disk, an optical disk, etc., and includes a number of instructions for enabling a computer device (which can be a personal computer, a server, or a network device, etc.) to execute the methods described in each embodiment or certain parts of the embodiments.

[0177] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the various embodiments of the present invention.

Claims

1. A method for determining fault ride-through current control parameters of a photovoltaic inverter, characterized in that: include: S1. For each test condition in a plurality of test conditions, determining, based on fault ride-through test data of a photovoltaic inverter, a first allowable deviation interval corresponding to a reactive current simulation result and a second allowable deviation interval corresponding to an active current simulation result under the test condition; S2. Determine reactive current control parameters according to a plurality of first deviation allowable intervals; S3. Determine an active current control mode according to a plurality of second deviation allowable intervals; S4. Determining a target current control parameter corresponding to the photovoltaic inverter according to the reactive current control parameter and the active current control mode; The determining, based on the fault ride-through test data of the photovoltaic inverter, a first allowable deviation interval corresponding to the reactive current simulation result and a second allowable deviation interval corresponding to the active current simulation result under the test condition includes: determining the electrical quantity characteristics of the photovoltaic inverter based on the fault ride-through test data; determining a first average value of the reactive current test result data and a second average value of the active current test result data under the test condition based on the electrical quantity characteristics; determining the first allowable deviation interval based on the first average value and a preset allowable deviation value; and determining the second allowable deviation interval based on the second average value and the preset allowable deviation value; The multiple test conditions include multiple low voltage fault ride-through conditions and multiple high voltage fault ride-through conditions, and determining the reactive current control parameter according to the multiple first allowable deviation intervals includes: determining, from the multiple first allowable deviation intervals, low-fault ride-through sub-intervals corresponding to the multiple low voltage fault ride-through conditions and high-fault ride-through sub-intervals corresponding to the multiple high voltage fault ride-through conditions; determining a low-fault ride-through control parameter according to the multiple low-fault ride-through sub-intervals; and determining a high-fault ride-through control parameter according to the multiple high-fault ride-through sub-intervals; and determining the reactive current control parameter according to the low-fault ride-through control parameter and the high-fault ride control parameter. Determining the active current control mode according to the plurality of second deviation allowable intervals includes: determining an active current standard deviation according to the plurality of second deviation allowable intervals; determining the active current control mode according to the active current standard deviation; wherein the active current standard deviation includes a first active current standard deviation and a second active current standard deviation; and the active current control mode includes an active current constant control mode and a reactive current priority output control mode; The target current control parameter corresponding to the photovoltaic inverter is determined according to the reactive current control parameter and the active current control mode, including: S41, determining the reactive current simulation deviation according to the reactive current control parameter; and determining the active current simulation deviation according to the active current control mode; S42, when the reactive current simulation deviation does not meet the requirements of the first regulation, reducing the multiple first deviation allowable intervals according to a preset ratio to obtain multiple third deviation allowable intervals, using the multiple third deviation allowable intervals as new multiple first deviation allowable intervals, and repeating the above S2 until the reactive current simulation deviation finally determined meets the requirements of the first regulation; S43, in When the active current simulation deviation does not meet the requirements of the second procedure, the multiple second deviation allowable intervals are reduced according to the preset ratio to obtain multiple fourth deviation allowable intervals, and the multiple fourth deviation allowable intervals are used as the new multiple second deviation allowable intervals, and the above S3 is repeatedly executed until the active current simulation deviation finally determined meets the requirements of the second procedure, and the first procedure requirements and the second procedure requirements both belong to the preset test procedures; S44, the reactive current control parameters corresponding to the reactive current simulation deviation that meets the requirements of the first procedure, and the active current control parameters corresponding to the active current simulation deviation that meets the requirements of the second procedure, are determined as the target current control parameters.

2. The method according to claim 1, characterized in that Determining the low penetration control parameters according to the multiple low penetration sub-intervals includes: Determine, from the plurality of low-penetration sub-intervals, a first low-penetration sub-interval corresponding to the current lowest voltage nominal value, and a second low-penetration sub-interval corresponding to the current highest voltage nominal value; Determining a first minimum value and a first maximum value of a reactive current droop coefficient according to the first low-pass sub-interval and the second low-pass sub-interval; determining a second maximum value of the reactive current equivalent intercept based on the first low-pass sub-interval and the first minimum value; and determining a second minimum value of the reactive current equivalent intercept based on the first low-pass sub-interval and the first maximum value; The first minimum value, the first maximum value, the second maximum value, and the second minimum value are determined as the low-through control parameters.

3. The method according to claim 1, characterized in that The electrical quantity characteristics include a fault start time and a fault clearing time, and determining a first average value of reactive current test result data and a second average value of active current test result data under the test condition based on the electrical quantity characteristics includes: Determining a first starting point of reactive current test result data and a second starting point of active current test result data under the test condition according to the fault starting time; Determining, according to the fault clearing moment, a first end point of the reactive current test result data and a second end point of the active current test result data under the test condition; determining the first average value according to the first starting point and the first ending point; The second average value is determined according to the second starting point and the second ending point.

4. A photovoltaic inverter fault ride-through current control parameter determination device for implementing the photovoltaic inverter fault ride-through current control parameter determination method according to claim 1, characterized in that: include: a deviation allowable interval determination module for determining, for each of a plurality of test conditions, a first deviation allowable interval corresponding to a reactive current simulation result and a second deviation allowable interval corresponding to an active current simulation result under the test condition based on fault ride-through test data of the photovoltaic inverter; a current control parameter determination module, configured to determine a reactive current control parameter according to a plurality of first deviation allowable intervals; An active current control mode is determined according to a plurality of second deviation allowable intervals; and a target current control parameter corresponding to the photovoltaic inverter is determined according to the reactive current control parameter and the active current control mode.

5. An electronic device comprising a memory, a processor, and a computer program stored in the memory and executable on the processor, wherein: When the processor executes the program, the method for determining the photovoltaic inverter fault ride-through current control parameter according to any one of claims 1 to 3 is implemented.

6. A non-transitory computer-readable storage medium having a computer program stored thereon, characterized in that: When the computer program is executed by a processor, the method for determining the fault ride-through current control parameters of a photovoltaic inverter according to any one of claims 1 to 3 is implemented.

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