Method, device and equipment for testing conversion efficiency value of inverter and storage medium

Abstract

The invention provides a test method and device for a conversion efficiency value of an inverter, equipment and a storage medium. The method comprises the steps of obtaining a current target input voltage needing to be tested and target output power under the current target input voltage; determining initial input power of the photovoltaic power supply based on the current target output power, and controlling the photovoltaic power supply to output power to an inverter based on the initial input power; the active power fixed value of the inverter is controlled to be the current target output power, and the voltage of the photovoltaic power input inverter is at least adjusted based on the current target output power, so that the deviation between the voltage of the photovoltaic power input inverter and the current target input voltage is smaller than a first deviation threshold value; detecting actual test data corresponding to the current target output power; the total conversion efficiency value of the inverter is determined based on the actual test data corresponding to the current target output power, the conversion efficiency value of the inverter can be automatically tested through the photovoltaic power supply, and the conversion efficiency of the inverter can be accurately evaluated.

Description

Technical Field

[0001] The present application belongs to the technical field of inverters, and in particular, relates to a method, device, equipment and storage medium for testing the conversion efficiency value of an inverter. Background Art

[0002] The inverter conversion efficiency is a key technical indicator of the inverter product. It is the ratio of the input DC power to AC power. This ratio is usually less than 1 because there will be a certain amount of power loss during the conversion process, including heat loss and standby power consumption. By testing the conversion efficiency of the inverter, the product design can be optimized according to the results of the efficiency test, so that the conversion efficiency of the product meets higher efficiency indicators and improves the competitiveness of the product. When testing the inverter, it is necessary to test the conversion efficiency of each type of product under different voltages and different power ranges, as well as the conversion efficiency information of each type of product under multiple certification standards. In related technologies, manual testing is usually used to test the target voltage and target power directly input by the photovoltaic power supply. However, the input voltage of the photovoltaic power supply fluctuates greatly, resulting in inaccurate conversion efficiency obtained by the test, and the test efficiency is low through manual testing. Summary of the invention

[0003] The embodiments of the present application provide a method, device, equipment and storage medium for testing the conversion efficiency value of an inverter, which can automatically test the conversion efficiency value of the inverter through a photovoltaic power source and can accurately evaluate the conversion efficiency of the inverter.

[0004] In a first aspect, an embodiment of the present application provides a method for testing a conversion efficiency value of an inverter, comprising:

[0005] Obtaining a current target input voltage to be tested and a target output power under the current target input voltage;

[0006] Determining an initial input power of the photovoltaic power source based on the current target output power, and controlling the photovoltaic power source to output power to the inverter based on the initial input power;

[0007] Controlling the active power of the inverter to be fixed at the current target output power, and adjusting at least the voltage of the photovoltaic power source input to the inverter based on the current target output power, so that the deviation between the voltage of the photovoltaic power source input to the inverter and the current target input voltage is less than a first deviation threshold;

[0008] Detecting actual test data corresponding to the current target output power;

[0009] The total efficiency value of the inverter conversion is determined based on actual test data corresponding to the current target output power.

[0010] In some embodiments, adjusting at least the voltage of the photovoltaic power input inverter based on the current target output power includes:

[0011] When the deviation between the current target output power and the maximum output power of the inverter is less than a second deviation threshold, the voltage of the photovoltaic power source input to the inverter is adjusted so that the deviation between the voltage of the photovoltaic power source input to the inverter and the current target input voltage is less than a first deviation threshold.

[0012] In some embodiments, adjusting at least the voltage of the photovoltaic power input inverter based on the current target output power includes:

[0013] When the current target output power is equal to the rated output power of the inverter, adjusting the voltage of the photovoltaic power source input to the inverter so that the deviation between the voltage of the photovoltaic power source input to the inverter and the current target input voltage is less than a first deviation threshold;

[0014] When the deviation between the voltage of the input inverter and the current target input voltage is less than a first deviation threshold, the current output power of the inverter is obtained, and the fixed value of the active power of the inverter is adjusted based on the current output power and the current target output power, so that the deviation between the adjusted current output power and the current target output power is less than a third deviation threshold.

[0015] In some embodiments, adjusting at least the voltage of the photovoltaic power input inverter based on the current target output power includes:

[0016] In a case where the current target output power is less than the rated output power of the inverter, obtaining the current output power of the inverter, and adjusting the fixed value of active power of the inverter based on the current output power and the current target output power, so that the deviation between the adjusted current output power and the current target output power is less than a third deviation threshold;

[0017] When the deviation between the adjusted current output power and the current target output power is less than the third deviation threshold, the voltage of the photovoltaic power source input to the inverter is adjusted so that the deviation between the voltage of the photovoltaic power source input to the inverter and the current target input voltage is less than the first deviation threshold.

[0018] In some embodiments, determining the initial input power of the photovoltaic power source based on the current target output power corresponding to the current target input voltage includes:

[0019] Determining a magnitude relationship between the current target output power and a preset power value, wherein the preset power value is determined based on a power characteristic of the photovoltaic power source;

[0020] When the current target output power is greater than or equal to a preset power threshold, the minimum value of a first preset value and a second preset value is determined as the initial input power value, wherein the first preset value is equal to a first preset coefficient multiplied by the current target input power value, and the second preset value is equal to a second preset coefficient multiplied by the rated output power of the photovoltaic power source;

[0021] When the current target output power is less than the preset power threshold, the minimum value between the third preset value and the second preset value is determined as the initial input power value, wherein the third preset value is equal to a third preset coefficient multiplied by the current target input power value, and wherein the third preset coefficient is greater than the first preset coefficient.

[0022] In some embodiments, the actual test data includes: the actual input power and the actual output power of the inverter within a preset time period, and the determining the total efficiency value of the inverter conversion based on the actual test data corresponding to the current target output power includes:

[0023] Determine an average value of actual input power of the inverter within a preset time length, and determine an average value of actual output power of the inverter within the preset time length;

[0024] Determining a conversion efficiency value corresponding to the current target output power value based on an average value of the actual input power and an average value of the actual output power;

[0025] Determine whether all target input voltages and target output powers at each target input voltage have been traversed;

[0026] When all target input voltages and target output powers at each target input voltage are traversed, a total efficiency value of the inverter conversion is determined based on conversion efficiency values ​​corresponding to each target output power.

[0027] In some embodiments, determining the total efficiency value of the inverter conversion based on the conversion efficiency values ​​corresponding to the respective target output powers includes:

[0028] Get the target region configured by the user;

[0029] Determine a calculation formula for the total efficiency value corresponding to the target area;

[0030] The total efficiency value of the inverter conversion is calculated based on the calculation formula and the conversion efficiency values ​​corresponding to the respective target output powers.

[0031] In a second aspect, an embodiment of the present application provides a device for testing the conversion efficiency value of an inverter, comprising:

[0032] A first acquisition module, used to acquire a current target input voltage to be tested and a target output power under the current target input voltage;

[0033] A first control module, configured to determine an initial input power of the photovoltaic power source based on the current target output power, and control the photovoltaic power source to output power to the inverter based on the initial input power;

[0034] a second control module, configured to control the active power of the inverter to be fixed at the current target output power, and to adjust at least the voltage of the photovoltaic power source input to the inverter based on the current target output power, so that the deviation between the voltage of the photovoltaic power source input to the inverter and the current target input voltage is less than a first deviation threshold;

[0035] A detection module, used to detect actual test data corresponding to the current target output power;

[0036] A determination module is used to determine the total efficiency value of the inverter conversion based on actual test data corresponding to the current target output power.

[0037] In a third aspect, an embodiment of the present application provides an electronic device, comprising a memory, a processor, and a computer program stored in the memory and executable on the processor, wherein the processor implements any of the methods described above when executing the computer program.

[0038] In a fourth aspect, an embodiment of the present application provides a computer-readable storage medium, wherein the computer-readable storage medium stores a computer program, and when the computer program is executed by a processor, any of the methods described above is implemented.

[0039] In a fifth aspect, an embodiment of the present application provides a computer program product, which, when executed on a terminal device, enables the electronic device to execute any of the methods described above.

[0040] Compared with the prior art, the embodiments of the present invention have the following beneficial effects:

[0041] The test method for the conversion efficiency value of the inverter provided in the embodiment of the present application obtains the current target input voltage to be tested and the target output power under the current target input voltage; determines the initial input power of the photovoltaic power source based on the current target output power, and controls the photovoltaic power source output power to the inverter based on the initial input power; controls the active power of the inverter to be fixed at the current target output power, and adjusts at least the voltage of the photovoltaic power source input to the inverter based on the current target output power, so that the deviation between the voltage of the photovoltaic power source input to the inverter and the current target input voltage is less than a first deviation threshold; detects the actual test data corresponding to the current target output power; and determines the total efficiency value of the inverter conversion based on the actual test data corresponding to the current target output power. The conversion efficiency value of the inverter can be automatically tested through the photovoltaic power source, and the conversion efficiency of the inverter can be accurately evaluated. BRIEF DESCRIPTION OF THE DRAWINGS

[0042] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative labor.

[0043] Figure 1 A schematic diagram of the implementation flow of a method for testing the conversion efficiency value of an inverter provided for the implementation of the present application;

[0044] Figure 2 A schematic diagram of the implementation flow of another method for testing the conversion efficiency value of an inverter provided for the implementation of the present application;

[0045] Figure 3 A schematic diagram of the structure of a test device for the conversion efficiency value of an inverter provided in an embodiment of the present application;

[0046] Figure 4 A schematic diagram of the structure of an electronic device provided in an embodiment of the present application. DETAILED DESCRIPTION

[0047] In the following description, specific details such as specific system structures, technologies, etc. are provided for the purpose of illustration rather than limitation, so as to provide a thorough understanding of the embodiments of the present application. However, it should be clear to those skilled in the art that the present application may also be implemented in other embodiments without these specific details. In other cases, detailed descriptions of well-known systems, devices, circuits, and methods are omitted to prevent unnecessary details from obstructing the description of the present application.

[0048] It should be understood that when used in the present specification and the appended claims, the term "comprising" indicates the presence of described features, wholes, steps, operations, elements and / or components, but does not exclude the presence or addition of one or more other features, wholes, steps, operations, elements, components and / or combinations thereof.

[0049] It should also be understood that the term “and / or” used in the specification and appended claims refers to any and all possible combinations of one or more of the associated listed items, and includes these combinations.

[0050] As used in the specification of this application and the appended claims, the term "if" can be interpreted as "when" or "uponce" or "in response to determining" or "in response to detecting" depending on the context. Similarly, the phrases "if it is determined" or "if it is detected" can be interpreted as meaning "uponce it is determined" or "in response to determining" or "uponce detected" or "in response to detecting" depending on the context.

[0051] In addition, in the description of the present application specification and the appended claims, the terms "first", "second", "third", etc. are only used to distinguish the descriptions and cannot be understood as indicating or implying relative importance.

[0052] References to "one embodiment" or "some embodiments" etc. described in the specification of this application mean that one or more embodiments of the present application include specific features, structures or characteristics described in conjunction with the embodiment. Therefore, the phrases "in one embodiment", "in some embodiments", "in some other embodiments", "in some other embodiments", etc. appearing in different places in this specification do not necessarily refer to the same embodiment, but mean "one or more but not all embodiments", unless otherwise specifically emphasized in other ways.

[0053] Based on the problems in the related art, an embodiment of the present application provides a method for testing the conversion efficiency value of an inverter, which can be applied to electronic devices. The electronic devices may include: mobile phones, tablet computers, wearable devices, augmented reality (AR) / virtual reality (VR) devices, laptops, ultra-mobile personal computers (UMPC), netbooks, personal digital assistants (PDA), etc.

[0054] The present application provides a method for testing the conversion efficiency value of an inverter. Figure 1 A schematic diagram of the implementation flow of a method for testing the conversion efficiency value of an inverter provided for the implementation of this application is as follows: Figure 1 As shown, the test method for the conversion efficiency value of the inverter includes:

[0055] Step S101, obtaining a current target input voltage to be tested and a target output power under the current target input voltage.

[0056] In the embodiment of the present application, the current target input voltage refers to the input voltage value that the inverter is expected to receive under specific test conditions. This value is usually determined based on the design specifications and test requirements of the inverter. The target output power is the output power value that the inverter should achieve under a given current target input voltage. This value is used to evaluate the performance of the inverter under different input voltages.

[0057] In the embodiment of the present application, different inverters have different test data, and the test data includes: input voltage and output power under each input voltage. The input voltage generally includes a maximum voltage value, a minimum voltage value, and a voltage value between the maximum voltage and the minimum voltage. The voltage value between the maximum voltage and the minimum voltage can be the minimum voltage plus a preset coefficient multiplied by a voltage difference. The voltage difference is equal to the maximum voltage minus the minimum voltage. There can be multiple preset coefficients, for example, 0.3, 0.5, etc. Each input voltage corresponds to multiple output powers, and the output powers can include: 5% output rated power, 10% output rated power, 20% rated output power, 30% rated output power, 50% rated output power, 75% rated output power, and 100% rated output power.

[0058] In the implementation of the present application, the input voltage and the target output power under the input voltage in the test data can be obtained in sequence, so as to obtain the current target input voltage and the target output power under the current target input voltage. The current target output voltage can be any one of the input voltages in the test data, and the target output power can be any one of the output powers under the current target input voltage. For example, the current target input voltage is: minimum voltage, and the target output power is: 30% rated output power.

[0059] Step S102: determining the initial input power of the photovoltaic power source based on the current target output power, and controlling the photovoltaic power source to output power to the inverter based on the initial input power.

[0060] In the embodiment of the present application, the inverter is a power electronic device that can convert direct current (DC) into alternating current (AC). In a photovoltaic system, an inverter is usually used to convert the direct current generated by a photovoltaic power source (PV) into an alternating current suitable for use by a power grid or a load. Since the voltage and current curve of a photovoltaic power source is usually a nonlinear curve, its shape is affected by many factors, including the characteristics of photovoltaic materials, the structure of the battery, the light intensity, the temperature, etc. In a photovoltaic system, the main input of the inverter is a photovoltaic power source. Therefore, in order to test the conversion efficiency of the inverter in the photovoltaic system, a photovoltaic power source is required.

[0061] In the embodiment of the present application, the initial input power that the photovoltaic power source should provide when starting the test can be calculated based on the current target output power. This initial input power is used to ensure that the inverter can obtain sufficient input power to achieve the target output power.

[0062] In the embodiment of the present application, the initial input power is the power input from the photovoltaic power source to the inverter.

[0063] Step S103, controlling the active power of the inverter to be fixed at the current target output power, and adjusting at least the voltage of the photovoltaic power input inverter based on the current target output power, so that the deviation between the voltage of the photovoltaic power input inverter and the current target input voltage is less than a first deviation threshold.

[0064] In the embodiment of the present application, the fixed value of active power is the actual power value output by the inverter. The first deviation threshold is an allowable voltage deviation range, which is used to ensure the accuracy of the input inverter voltage. When the deviation between the voltage of the photovoltaic power input inverter and the target input voltage is less than this threshold, it can be considered that the voltage of the input inverter is close to the target input voltage.

[0065] In the embodiment of the present application, the electronic device can be connected to the control system of the inverter in communication, and the active power of the inverter can be set to the current target output power value through the control system of the inverter to ensure that the actual power output by the inverter matches the current target output power.

[0066] In an embodiment of the present application, the electronic device can be communicatively connected to the photovoltaic power source. While keeping the active power of the inverter fixed at the current target output power, the electronic device can control the photovoltaic power source to adjust the voltage of the photovoltaic power source input inverter.

[0067] In the embodiment of the present application, the electronic device can monitor the change of the input voltage in real time and compare it with the current target input voltage. If the deviation between the input voltage and the current target voltage exceeds the first deviation threshold, the voltage of the photovoltaic power input inverter can be adjusted so that the deviation between the voltage of the photovoltaic power input inverter and the current target input voltage is less than the first deviation threshold. When the deviation between the voltage of the photovoltaic power input inverter and the current target input voltage is less than the first deviation threshold, it can be considered that the voltage of the input inverter is close to the current target input voltage.

[0068] Step S104: detecting actual test data corresponding to the current target output power.

[0069] In the embodiment of the present application, the electronic device can be connected to the detection device for communication, and the actual test data corresponding to the current target output power can be obtained through the detection device. The actual test data can include: the actual input power and the actual output power of the inverter. The detection device can include: a power splitter, a current detection device, a voltage detection device, etc.

[0070] In the embodiment of the present application, the actual test data may be the actual input power and the actual output power of the inverter within a preset time period.

[0071] Step S105 , determining a total efficiency value of the inverter conversion based on actual test data corresponding to the current target output power.

[0072] In the embodiment of the present application, after testing the current target input voltage and the target output power at the current target input voltage, the next target input voltage and the target output power at the target input voltage are continuously tested until there is no input voltage and output power at the input voltage that need to be tested. Thus, the actual test data corresponding to each target output power is obtained, and the total efficiency value of the inverter conversion is determined based on the actual test number corresponding to each target output power.

[0073] In the embodiment of the present application, the conversion efficiency value of the inverter during the entire test process can be calculated based on actual test data using a specific formula or algorithm. This value reflects the energy conversion performance of the inverter under specific test conditions.

[0074] The test method for the conversion efficiency value of the inverter provided in the embodiment of the present application obtains the current target input voltage to be tested and the target output power under the current target input voltage; determines the initial input power of the photovoltaic power source based on the current target output power, and controls the photovoltaic power source output power to the inverter based on the initial input power; controls the active power of the inverter to be fixed at the current target output power, and adjusts at least the voltage of the photovoltaic power source input to the inverter based on the current target output power, so that the deviation between the voltage of the photovoltaic power source input to the inverter and the current target input voltage is less than a first deviation threshold; detects the actual test data corresponding to the current target output power; and determines the total efficiency value of the inverter conversion based on the actual test data corresponding to the current target output power. The conversion efficiency value of the inverter can be automatically tested through the photovoltaic power source, and the conversion efficiency of the inverter can be accurately evaluated.

[0075] In some embodiments, step S103, adjusting at least the voltage of the photovoltaic power source input inverter based on the current target output power, includes:

[0076] Step S1031, when the deviation between the current target output power and the maximum output power of the inverter is less than the second deviation threshold, the voltage of the photovoltaic power input inverter is adjusted so that the deviation between the voltage of the photovoltaic power input inverter and the current target input voltage is less than the first deviation threshold.

[0077] In the embodiment of the present application, the second deviation threshold and the first deviation threshold can be configured, and the second deviation threshold and the first deviation threshold can be 0 or a smaller number.

[0078] In the embodiment of the present application, the second deviation threshold is an allowable power deviation range, which is used to ensure that the deviation between the current target output power and the maximum output power of the inverter is small. When the deviation between the current target output power and the maximum output power of the inverter is less than the second deviation threshold value, it can be considered that the current target output power at this time is close to or equal to the maximum output power. Since the current target output power is close to or equal to the maximum output power, the output power of the inverter can no longer be adjusted. Therefore, at this time, only the voltage of the photovoltaic power input inverter is adjusted.

[0079] In the embodiment of the present application, the voltage of the input inverter can be adjusted to the current target input voltage so that the voltage of the input inverter is equal to the current target input voltage.

[0080] Exemplarily, the current target output power is expressed as: dst_pmp. When dst_pmp=maximum output power, the voltage of the input inverter of the PV source is adjusted to be the target input voltage.

[0081] The method provided in the embodiment of the present application can ensure that the voltage of the input inverter is maintained at the current target input voltage while the active power of the inverter is kept fixed by adjusting the voltage of the photovoltaic power input inverter, thereby achieving accurate testing.

[0082] In some embodiments, step S103, adjusting at least the voltage of the photovoltaic power source input inverter based on the current target output power, includes:

[0083] Step S1032, when the current target output power is equal to the rated output power of the inverter, adjusting the voltage of the photovoltaic power input inverter so that the deviation between the voltage of the photovoltaic power input inverter and the current target input voltage is less than a first deviation threshold.

[0084] In the embodiment of the present application, the rated output power is the maximum power value that the inverter can continuously output under standard test conditions (such as specific input voltage, temperature and light intensity).

[0085] In the embodiment of the present application, when the current target output power is equal to the rated output power of the inverter, the voltage of the photovoltaic power input inverter is adjusted. The purpose of the adjustment is to make the deviation between the voltage of the photovoltaic power input inverter and the current target input voltage less than the first deviation threshold.

[0086] Step S1033, when the deviation between the voltage of the input inverter and the current target input voltage is less than the first deviation threshold, obtain the current output power of the inverter, and adjust the fixed value of the active power of the inverter based on the current output power and the current target output power so that the deviation between the adjusted current output power and the current target output power is less than the third deviation threshold.

[0087] In the embodiment of the present application, the third deviation threshold can be configured, and the third deviation threshold can be 0 or a smaller number, so that the deviation between the current output power and the current target input power is smaller.

[0088] In the embodiment of the present application, the current output power can be detected and the fixed value of the active power of the inverter can be adjusted so that the output power of the inverter is consistent with the current target output power.

[0089] The method provided in the embodiment of the present application can ensure that the output power of the inverter approaches or reaches the current target output power while maintaining a stable input voltage by adjusting the voltage of the photovoltaic power input inverter and the fixed value of the active power of the inverter, so as to achieve accurate testing and meet testing requirements.

[0090] In some embodiments, step S103, adjusting at least the voltage of the photovoltaic power source input inverter based on the current target output power, includes:

[0091] Step S1034, when the current target output power is less than the rated output power of the inverter, obtain the current output power of the inverter, and adjust the fixed value of the active power of the inverter based on the current output power and the current target output power, so that the deviation between the adjusted current output power and the current target output power is less than the third deviation threshold.

[0092] In an embodiment of the present application, when the current target output power is less than the rated output power of the inverter, the current output power of the inverter is first obtained. Then, based on the current output power and the current target output power, the fixed value of the active power of the inverter is adjusted. The purpose of the adjustment is to make the deviation between the adjusted current output power and the current target output power less than the third deviation threshold. This ensures that the inverter can operate as close to the current target output power as possible without exceeding its rated output power.

[0093] Step S1035, when the deviation between the adjusted current output power and the current target output power is less than the third deviation threshold, adjust the voltage of the photovoltaic power input inverter so that the deviation between the voltage of the photovoltaic power input inverter and the current target input voltage is less than the first deviation threshold.

[0094] In the embodiment of the present application, when the deviation between the adjusted current output power and the current target output power is less than the third deviation threshold, the voltage of the photovoltaic power input inverter is adjusted next. The purpose of the adjustment is to make the deviation between the voltage of the photovoltaic power input inverter and the current target input voltage less than the first deviation threshold.

[0095] In the embodiment of the present application, the active power fixed value is first adjusted to ensure that the output power is close to the target value, and then the input voltage is adjusted to ensure that the voltage is close to the current target input voltage. This adjustment sequence helps to reduce system fluctuations and improve control accuracy and efficiency.

[0096] In the embodiment of the present application, when adjusting the voltage of the input inverter, the adjustment step can be set, and the judgment is made again after each adjustment. If the adjustment times reach the preset times and the deviation between the adjusted input voltage and the current target input voltage is not less than the first deviation threshold, the adjustment will be stopped. The preset times can be configured, and illustratively, it can be configured to 5 times.

[0097] In some embodiments, step S102, determining the initial input power of the photovoltaic power source based on the current target output power corresponding to the current target input voltage, includes:

[0098] Step S1021, determining the magnitude relationship between the current target output power and a preset power value, wherein the preset power value is determined based on the power characteristics of the photovoltaic power source.

[0099] In the embodiment of the present application, different photovoltaic power sources have different power characteristics. The preset power value can be a change point of the power output by the photovoltaic power source. Before the preset power value, the power usually shows an increasing trend, and after the preset power value, the power shows a decreasing trend. Therefore, it is necessary to determine the preset power value by the power characteristics of the photovoltaic power source. For example, the preset power value is 2500W.

[0100] In the embodiment of the present application, by determining the magnitude relationship between the current target output power and the preset power value, it is possible to determine whether the current target output power has reached a specific level, thereby determining the subsequent calculation method.

[0101] Step S1022, when the current target output power is greater than or equal to the preset power threshold, the minimum value between the first preset value and the second preset value is determined as the initial input power value, wherein the first preset value is equal to the first preset coefficient multiplied by the current target input power value, and the second preset value is equal to the second preset coefficient multiplied by the rated output power of the photovoltaic power source.

[0102] In the embodiment of the present application, if the current target output power is greater than or equal to the preset power threshold, it means that the photovoltaic power supply needs to output a larger power. At this time, the minimum value between the first preset value and the second preset value is determined as the initial input power value. This is to ensure that the photovoltaic power supply operates as close to the target output power as possible without exceeding its rated output power. The first preset value reflects the impact of the current target input power (or related value) on the initial input power, while the second preset value takes into account the rated output power of the photovoltaic power supply.

[0103] In the embodiment of the present application, the first preset coefficient and the second preset coefficient can be obtained according to experiments. Following the above example, the first preset coefficient is 1.2, the second preset coefficient is 1.2, and the calculation formula of the initial input power value can be expressed as:

[0104] The current target output power is ≥ 2500W, and the initial input power value pmp = min(1.2*dst_pmp, 1.2*pn), where pn is the rated output power and dst_pmp is the current target input power value.

[0105] Step S1023, when the current target output power is less than the preset power threshold, the minimum value between the third preset value and the second preset value is determined as the initial input power value, wherein the third preset value is equal to the third preset coefficient multiplied by the current target input power value, wherein the third preset coefficient is greater than the first preset coefficient.

[0106] In an embodiment of the present application, if the current target output power is less than the preset power threshold, it means that the power that the photovoltaic power source needs to output is small. At this time, the smallest value of the third preset value and the second preset value is determined as the initial input power value. In an embodiment of the present application, the third preset coefficient can be obtained according to experimental data, and the third preset coefficient can be 2. Continuing with the above example, the calculation formula for the initial input power value can be expressed as: current target output power <2500W, initial input power value pmp=min(2*dst_pmp,1.2*pn).

[0107] The embodiment of the present application can ensure, through the above calculation process, that the photovoltaic power source has a reasonable input power value during initial operation, which value will not exceed the rated output power of the photovoltaic power source and can be as close to the target output power as possible.

[0108] In some embodiments, the actual test data includes: the actual input power and the actual output power of the inverter within a preset time period. Step S105 determines the total efficiency value of the inverter conversion based on the actual test data corresponding to the current target output power, including:

[0109] Step S1051, determining an average value of actual input power of the inverter within a preset time length, and determining an average value of actual output power of the inverter within the preset time length.

[0110] In the embodiment of the present application, the preset duration can be configured, and for example, can be configured to 1 minute, 2 minutes, etc.

[0111] In the embodiment of the present application, by calculating the average value of the actual input power and the actual output power of the inverter within a preset time period, the influence of data fluctuation on the conversion efficiency calculation can be reduced, thereby obtaining a more accurate efficiency value.

[0112] Step S1052: determining a conversion efficiency value corresponding to the current target output power value based on the average value of the actual input power and the average value of the actual output power.

[0113] In the embodiment of the present application, the conversion efficiency value can be obtained by dividing the average value of the actual output power by the average value of the actual input power.

[0114] Step S1053, determining whether all target input voltages and target output powers at each target input voltage have been traversed.

[0115] In the embodiment of the present application, it is determined whether all target input voltages and target output powers at each target input voltage have been traversed to ensure that the test covers all possible conditions, thereby obtaining a comprehensive efficiency evaluation.

[0116] Step S1054: after traversing all target input voltages and the target output powers at each target input voltage, determine a total efficiency value of the inverter conversion based on the conversion efficiency values ​​corresponding to each target output power.

[0117] In the embodiment of the present application, after traversing all target input voltages and the target output powers at each target input voltage, the total efficiency value of the inverter conversion is determined based on the conversion efficiency values ​​corresponding to each target output power.

[0118] In an embodiment of the present application, a target area configured by a user may be obtained; a calculation formula for a total efficiency value corresponding to the target area may be determined; and a total efficiency value of the inverter conversion may be calculated based on the calculation formula and conversion efficiency values ​​corresponding to each target output power.

[0119] In the embodiment of the present application, different target areas may correspond to different calculation formulas for total efficiency values. By acquiring the configured target area, the calculation formula may be obtained, and then the total efficiency value may be calculated based on the calculation formula. The calculation formula may be a weighted calculation formula. The weighting coefficients corresponding to the conversion efficiency values ​​under different test conditions may be different.

[0120] For example, taking area A as an example, the calculation formula for area A is: 0.02*η(5%)+0.03*η(10%)+0.06*η(20%)+0.12η(30%)+0.25*η(50%)+0.37*η(75%)+

[0121] 0.15*η(100%). By inputting each conversion efficiency value into the calculation formula, the total efficiency value of the inverter conversion can be obtained. For another example, the calculation formula for area B is: 0.03*η(5%)+0.06*η(10%)+0.13*η(20%)+0.10η(30%)+0.48*η(50%)+0.20*η(100%). If the target area is area B, the calculation formula corresponding to area B is used for calculation.

[0122] The method provided in the embodiment of the present application determines the average value of the actual input power of the inverter within a preset time length, and determines the average value of the actual output power of the inverter within the preset time length; determines the conversion efficiency value corresponding to the current target output power value based on the average value of the actual input power and the average value of the actual output power; determines whether all target input voltages and the target output power at each target input voltage have been traversed; after traversing all target input voltages and the target output power at each target input voltage, determines the total efficiency value of the inverter conversion based on the conversion efficiency values ​​corresponding to each target output power, and can accurately obtain the total efficiency value of the inverter conversion.

[0123] Based on the test methods for the conversion efficiency value of the inverter provided in the above-mentioned embodiments, the embodiment of the present application further provides a test method for the conversion efficiency value of the inverter. Figure 2 A flow chart of a method for testing the conversion efficiency value of an inverter provided in an embodiment of the present application is shown in FIG. Figure 2 As shown, including:

[0124] Step S201, sequentially obtaining input voltage values ​​to be tested and target output power at each input voltage.

[0125] Step S202, determining whether all input voltages have been tested.

[0126] In the embodiment of the present application, if no, execute step S203, and if yes, execute step S204.

[0127] Step S203, sequentially obtaining target output power values ​​under the current target input voltage.

[0128] After step S203, step S205 is executed.

[0129] Step S204, read the configured target area, obtain the calculation formula corresponding to the target area, and calculate the average weighted total efficiency value.

[0130] After step S204, the process ends.

[0131] Step S205, determining whether the target output power value under the current target input voltage has been tested.

[0132] If yes, continue to execute step S201, if no, execute step S206.

[0133] Step S206, calculating the power required to be input by the photovoltaic power source according to the target output power value, and setting it as the initial input power of the photovoltaic power source.

[0134] In the embodiment of the present application, the calculation formula is: target output power value <2500W: pmp=min(2*dst_pmp,1.2*pn), target output power value ≥2500W: pmp=min(1.2*dst_pmp,1.2*pn).

[0135] Step S207, setting the fixed value of the inverter active power to the target output power value, and waiting for the power to stabilize.

[0136] Step S208, determining whether the target output power value is equal to the maximum output power.

[0137] In the embodiment of the present application, if yes, execute step S209, and if no, execute step S210.

[0138] Step S209, adjusting the voltage of the photovoltaic power source input inverter to a target voltage value, with a maximum adjustment number of 5 times.

[0139] Step S210, determining whether the target output power value is equal to the rated power.

[0140] In the embodiment of the present application, if yes, execute step S211, and if no, execute step S212.

[0141] Step S211, adjusting the voltage of the photovoltaic power input inverter to make it a target voltage value, with a maximum adjustment number of 5 times.

[0142] After step S211, execute step S213.

[0143] Step S213, adjusting the fixed value of active power to the target output power value.

[0144] Step S212, adjusting the fixed value of active power to the target output power value.

[0145] After step S212, execute step S214.

[0146] Step S214, adjusting the voltage of the photovoltaic power input inverter to a target voltage value, with a maximum adjustment number of 5 times.

[0147] In the embodiment of the present application, after step S214, step S213 and step S209, step S215 is executed.

[0148] Step S215, recording actual test data within a preset time period.

[0149] Step S216, calculating the efficiency value according to the statistical average value.

[0150] In the embodiment of the present application, the average value can be calculated based on the actual test data, and the efficiency value can be calculated by the product average value.

[0151] After step S216, step S203 is executed.

[0152] The method provided in the embodiment of the present application uses an automated way to perform testing, freeing up human resources and equipment resources, making full use of nighttime resources, and shortening the duration. By adjusting the voltage of the photovoltaic power input inverter and adjusting the output power of the inverter, the deviation from the target input voltage and target output power is small, thereby obtaining more accurate efficiency data. By configuring different national standards, the average weighted total efficiency data of the standard is automatically calculated, and the test log is used to record the test process, and the csv file is used to record the basic data of each efficiency test, so that the test process can be traced back.

[0153] In the embodiment of the present application, according to the different target output power sizes, by adjusting the fixed value of the inverter's active power and adjusting the voltage of the PV source input inverter, the voltage of the input inverter and the output power of the inverter for testing the conversion efficiency are more accurate, and the efficiency value is more accurate.

[0154] It should be understood that the size of the serial numbers of the steps in the above embodiments does not mean the order of execution. The execution order of each process should be determined by its function and internal logic, and should not constitute any limitation on the implementation process of the embodiments of the present application.

[0155] According to the aforementioned embodiments, the embodiments of the present application provide a testing device for the conversion efficiency value of an inverter. The modules included in the device and the units included in the modules can be implemented by a processor in a computer device; of course, they can also be implemented by a specific logic circuit; in the implementation process, the processor can be a central processing unit (CPU), a microprocessor (MPU), a digital signal processor (DSP) or a field programmable gate array (FPGA), etc.

[0156] The present invention provides a device for testing the conversion efficiency of an inverter. Figure 3 A schematic diagram of a test device for the conversion efficiency of an inverter provided in an embodiment of the present application is shown in FIG. Figure 3 As shown, the test device 300 for the conversion efficiency value of the inverter includes:

[0157] The first acquisition module 301 is used to acquire the current target input voltage to be tested and the target output power under the current target input voltage;

[0158] A first control module 302, configured to determine an initial input power of the photovoltaic power source based on the current target output power, and control the photovoltaic power source to output power to the inverter based on the initial input power;

[0159] A second control module 303 is used to control the active power of the inverter to be fixed at the current target output power, and to adjust at least the voltage of the photovoltaic power input to the inverter based on the current target output power, so that the deviation between the voltage of the photovoltaic power input to the inverter and the current target input voltage is less than a first deviation threshold;

[0160] A detection module 304 is used to detect actual test data corresponding to the current target output power;

[0161] The determination module 305 is used to determine the total efficiency value of the inverter conversion based on the actual test data corresponding to the current target output power.

[0162] In some embodiments, the second control module includes:

[0163] A first control unit is used to adjust the voltage of the photovoltaic power input to the inverter when the deviation between the current target output power and the maximum output power of the inverter is less than a second deviation threshold, so that the deviation between the voltage of the photovoltaic power input to the inverter and the current target input voltage is less than the first deviation threshold.

[0164] In some embodiments, the second control module includes:

[0165] a second control unit, configured to adjust the voltage of the photovoltaic power source input to the inverter when the current target output power is equal to the rated output power of the inverter, so that a deviation between the voltage of the photovoltaic power source input to the inverter and the current target input voltage is less than a first deviation threshold;

[0166] A third control unit is used to obtain the current output power of the inverter when the deviation between the voltage of the input inverter and the current target input voltage is less than a first deviation threshold, and adjust the fixed value of the active power of the inverter based on the current output power and the current target output power so that the deviation between the adjusted current output power and the current target output power is less than a third deviation threshold.

[0167] In some embodiments, the second control module includes:

[0168] a fourth control unit, configured to, when the current target output power is less than the rated output power of the inverter, obtain the current output power of the inverter, and adjust the fixed value of active power of the inverter based on the current output power and the current target output power, so that a deviation between the adjusted current output power and the current target output power is less than a third deviation threshold;

[0169] a fifth control unit, for adjusting the voltage of the photovoltaic power source input to the inverter when the deviation between the adjusted current output power and the current target output power is less than the third deviation threshold, so that the deviation between the voltage of the photovoltaic power source input to the inverter and the current target input voltage is less than the first deviation threshold.

[0170] In some embodiments, the first control module includes:

[0171] A first determining unit, configured to determine a magnitude relationship between the current target output power and a preset power value, wherein the preset power value is determined based on a power characteristic of the photovoltaic power source;

[0172] A second determining unit is used to determine the minimum value of a first preset value and a second preset value as the initial input power value when the current target output power is greater than or equal to a preset power threshold, wherein the first preset value is equal to a first preset coefficient multiplied by the current target input power value, and the second preset value is equal to a second preset coefficient multiplied by the rated output power of the photovoltaic power source;

[0173] A third determination unit is used to determine the minimum value between a third preset value and a second preset value as the initial input power value when the current target output power is less than a preset power threshold, wherein the third preset value is equal to a third preset coefficient multiplied by the current target input power value, and wherein the third preset coefficient is greater than the first preset coefficient.

[0174] In some embodiments, the actual test data includes: the actual input power and the actual output power of the inverter within a preset time period, and the determination module includes:

[0175] a fourth determining unit, configured to determine an average value of actual input power of the inverter within a preset time period, and to determine an average value of actual output power of the inverter within the preset time period;

[0176] a fifth determining unit, configured to determine a conversion efficiency value corresponding to the current target output power value based on an average value of the actual input power and an average value of the actual output power;

[0177] a sixth determining unit, configured to determine whether all target input voltages and target output powers at each target input voltage have been traversed;

[0178] The seventh determination unit is used to determine the total efficiency value of the inverter conversion based on the conversion efficiency values ​​corresponding to each target output power after traversing all target input voltages and the target output power at each target input voltage.

[0179] In some embodiments, the seventh determining unit includes:

[0180] Get sub-hope, used to get the target area configured by the user;

[0181] A determination subunit, used to determine a calculation formula for a total efficiency value corresponding to the target area;

[0182] The calculation subunit is used to calculate the total efficiency value of the inverter conversion based on the calculation formula and the conversion efficiency values ​​corresponding to each target output power.

[0183] It should be noted that the information interaction, execution process, etc. between the above-mentioned devices / units are based on the same concept as the method embodiment of the present application. Their specific functions and technical effects can be found in the method embodiment part and will not be repeated here.

[0184] in addition, Figure 3 The test device for the conversion efficiency value of the inverter shown may be a software unit, a hardware unit, or a unit combining software and hardware, or may be integrated into the electronic device as an independent pendant, or may exist as an independent terminal device.

[0185] The technicians in the relevant field can clearly understand that for the convenience and simplicity of description, only the division of the above-mentioned functional units and modules is used as an example for illustration. In practical applications, the above-mentioned function allocation can be completed by different functional units and modules as needed, that is, the internal structure of the device can be divided into different functional units or modules to complete all or part of the functions described above. The functional units and modules in the embodiment can be integrated in a processing unit, or each unit can exist physically separately, or two or more units can be integrated in one unit. The above-mentioned integrated unit can be implemented in the form of hardware or in the form of software functional units. In addition, the specific names of the functional units and modules are only for the convenience of distinguishing each other, and are not used to limit the scope of protection of this application. The specific working process of the units and modules in the above-mentioned system can refer to the corresponding process in the aforementioned method embodiment, which will not be repeated here.

[0186] Figure 4 This is a schematic diagram of the structure of an electronic device provided in an embodiment of the present application. Figure 4 As shown, the electronic device 3 of this embodiment may include: at least one processor 30 ( Figure 4 Only one processor 30 is shown in the figure), a memory 31, and a computer program 32 stored in the memory 31 and executable on at least one processor 30. When the processor 30 executes the computer program 32, the steps in any of the above-mentioned method embodiments are implemented; or, when the processor 30 executes the computer program 32, the functions of the modules / units in the above-mentioned device embodiments are implemented.

[0187] Exemplarily, the computer program 32 may be divided into one or more modules / units, one or more modules / units are stored in the memory 31, and are executed by the processor 30 to complete the present application. One or more modules / units may be a series of computer program 32 instruction segments capable of completing specific functions, and the instruction segments are used to describe the execution process of the computer program 32 in the electronic device 3.

[0188] The embodiment of the present application further provides a computer-readable storage medium, which stores a computer program 32. When the computer program 32 is executed by the processor 30, the steps in the above-mentioned method embodiments can be implemented.

[0189] An embodiment of the present application provides a computer program product. When the computer program product runs on an electronic device, the electronic device can implement the steps in the above-mentioned method embodiments when executing the computer program product.

[0190] If the integrated unit is implemented in the form of a software functional unit and sold or used as an independent product, it can be stored in a computer-readable storage medium. According to this understanding, the present application implements all or part of the processes in the above-mentioned embodiment method, which can be completed by instructing the relevant hardware through a computer program 32, and the computer program 32 can be stored in a computer-readable storage medium, and the computer program 32 can implement the steps of the above-mentioned various method embodiments when executed by the processor 30. Among them, the computer program 32 includes computer program code, and the computer program code can be in source code form, object code form, executable file or some intermediate form. The computer-readable medium may at least include: any entity or device capable of carrying the computer program code to the terminal, a recording medium, a computer memory, a read-only memory (ROM, Read-Only Memory), a random access memory (RAM, Random Access Memory), an electric carrier signal, a telecommunication signal, and a software distribution medium. For example, a USB flash drive, a mobile hard disk, a magnetic disk or an optical disk. In some jurisdictions, according to legislation and patent practice, computer-readable media cannot be electric carrier signals and telecommunication signals.

[0191] In the above embodiments, the description of each embodiment has its own emphasis. For parts that are not described or recorded in detail in a certain embodiment, reference can be made to the relevant descriptions of other embodiments.

[0192] Those of ordinary skill in the art will appreciate that the units and algorithm steps of each example described in conjunction with the embodiments disclosed herein can be implemented in electronic hardware, or a combination of computer software and electronic hardware. Whether these functions are performed in hardware or software depends on the specific application and design constraints of the technical solution. Professional and technical personnel can use different methods to implement the described functions for each specific application, but such implementation should not be considered to be beyond the scope of this application.

[0193] In the embodiments provided in the present application, it should be understood that the disclosed devices / network equipment and methods can be implemented in other ways. For example, the device / network equipment embodiments described above are merely schematic. For example, the division of the modules or units is only a logical function division. There may be other division methods in actual implementation, such as multiple units or components can be combined or integrated into another system, or some features can be ignored or not executed. Another point is that the mutual coupling or direct coupling or communication connection shown or discussed can be through some interfaces, indirect coupling or communication connection of devices or units, which can be electrical, mechanical or other forms.

[0194] The units described as separate components may or may not be physically separated, and the components shown as units may or may not be physical units, that is, they may be located in one place or distributed on multiple network units. Some or all of the units may be selected according to actual needs to achieve the purpose of the solution of this embodiment.

[0195] The embodiments described above are only used to illustrate the technical solutions of the present application, rather than to limit them. Although the present application has been described in detail with reference to the aforementioned embodiments, a person skilled in the art should understand that the technical solutions described in the aforementioned embodiments may still be modified, or some of the technical features may be replaced by equivalents. Such modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the embodiments of the present application, and should all be included in the protection scope of the present application.

Claims

1. A method for testing the conversion efficiency value of an inverter, characterized in that: include: Obtaining a current target input voltage to be tested and a target output power under the current target input voltage; Determining an initial input power of the photovoltaic power source based on the current target output power, and controlling the photovoltaic power source to output power to the inverter based on the initial input power; Controlling the active power of the inverter to be fixed at the current target output power, and adjusting at least the voltage of the photovoltaic power source input to the inverter based on the current target output power, so that the deviation between the voltage of the photovoltaic power source input to the inverter and the current target input voltage is less than a first deviation threshold; Detecting actual test data corresponding to the current target output power; The total efficiency value of the inverter conversion is determined based on actual test data corresponding to the current target output power.

2. The method according to claim 1, characterized in that The step of adjusting at least the voltage of the photovoltaic power supply input inverter based on the current target output power includes: When the deviation between the current target output power and the maximum output power of the inverter is less than a second deviation threshold, the voltage of the photovoltaic power source input to the inverter is adjusted so that the deviation between the voltage of the photovoltaic power source input to the inverter and the current target input voltage is less than a first deviation threshold.

3. The method according to claim 1, characterized in that The step of adjusting at least the voltage of the photovoltaic power supply input inverter based on the current target output power includes: When the current target output power is equal to the rated output power of the inverter, adjusting the voltage of the photovoltaic power source input to the inverter so that the deviation between the voltage of the photovoltaic power source input to the inverter and the current target input voltage is less than a first deviation threshold; When the deviation between the voltage of the input inverter and the current target input voltage is less than a first deviation threshold, the current output power of the inverter is obtained, and the fixed value of the active power of the inverter is adjusted based on the current output power and the current target output power, so that the deviation between the adjusted current output power and the current target output power is less than a third deviation threshold.

4. The method according to claim 1, characterized in that: The step of adjusting at least the voltage of the photovoltaic power supply input inverter based on the current target output power includes: When the current target output power is less than the rated output power of the inverter, the current output power of the inverter is acquired, and the fixed value of active power of the inverter is adjusted based on the current output power and the current target output power, so that the deviation between the adjusted current output power and the current target output power is less than a third deviation threshold; When the deviation between the adjusted current output power and the current target output power is less than the third deviation threshold, the voltage of the photovoltaic power source input to the inverter is adjusted so that the deviation between the voltage of the photovoltaic power source input to the inverter and the current target input voltage is less than the first deviation threshold.

5. The method according to claim 1, characterized in that The determining of the initial input power of the photovoltaic power source based on the current target output power corresponding to the current target input voltage includes: Determining a magnitude relationship between the current target output power and a preset power value, wherein the preset power value is determined based on a power characteristic of the photovoltaic power source; When the current target output power is greater than or equal to a preset power threshold, the minimum value of a first preset value and a second preset value is determined as the initial input power value, wherein the first preset value is equal to a first preset coefficient multiplied by the current target input power value, and the second preset value is equal to a second preset coefficient multiplied by the rated output power of the photovoltaic power source; When the current target output power is less than the preset power threshold, the minimum value between the third preset value and the second preset value is determined as the initial input power value, wherein the third preset value is equal to a third preset coefficient multiplied by the current target input power value, and wherein the third preset coefficient is greater than the first preset coefficient.

6. The method according to claim 1, characterized in that The actual test data includes: the actual input power and the actual output power of the inverter within a preset time period, and the total efficiency value of the inverter conversion is determined based on the actual test data corresponding to the current target output power, including: Determine an average value of actual input power of the inverter within a preset time length, and determine an average value of actual output power of the inverter within the preset time length; Determining a conversion efficiency value corresponding to the current target output power value based on an average value of the actual input power and an average value of the actual output power; Determine whether all target input voltages and target output powers at each target input voltage have been traversed; When all target input voltages and target output powers at each target input voltage are traversed, a total efficiency value of the inverter conversion is determined based on conversion efficiency values ​​corresponding to each target output power.

7. The method according to claim 6, characterized in that The determining the total efficiency value of the inverter conversion based on the conversion efficiency values ​​corresponding to the respective target output powers comprises: Get the target region configured by the user; Determine a calculation formula for the total efficiency value corresponding to the target area; The total efficiency value of the inverter conversion is calculated based on the calculation formula and the conversion efficiency values ​​corresponding to the respective target output powers.

8. A test device for the conversion efficiency value of an inverter, characterized in that: include: A first acquisition module, used to acquire a current target input voltage to be tested and a target output power under the current target input voltage; A first control module, configured to determine an initial input power of the photovoltaic power source based on the current target output power, and control the photovoltaic power source to output power to the inverter based on the initial input power; a second control module, configured to control the active power of the inverter to be fixed at the current target output power, and to adjust at least the voltage of the photovoltaic power source input to the inverter based on the current target output power, so that the deviation between the voltage of the photovoltaic power source input to the inverter and the current target input voltage is less than a first deviation threshold; A detection module, used to detect actual test data corresponding to the current target output power; A determination module is used to determine the total efficiency value of the inverter conversion based on actual test data corresponding to the current target output power.

9. An electronic device comprising a memory, a processor, and a computer program stored in the memory and executable on the processor, characterized in that: When the processor executes the computer program, the method according to any one of claims 1 to 7 is implemented.

10. A computer-readable storage medium storing a computer program, characterized in that: When the computer program is executed by a processor, the method according to any one of claims 1 to 7 is implemented.

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