Power quality simulation device and method for performing power quality simulation

Abstract

The invention relates to a power quality simulation device and a method for performing power quality simulation. The power quality simulation device is used for generating test waveform data for performing a power quality test, and comprises a waveform inversion unit configured to generate a first intermediate power supply signal based on user-defined input waveform data; a power quality standard unit configured to generate a second intermediate power supply signal based on a setting parameter input by a user; the sampling and converting unit is configured to collect and sample the first and / or second intermediate power supply signals so as to convert the first and / or second intermediate power supply signals into corresponding first and / or second waveform data; and the general control unit is configured to couple the units to realize communication among the units, control operation of the units and generate test waveform data for performing the power quality test based on the first waveform data and / or the second waveform data, and the test waveform data comprises at least one power quality disturbance.

Description

Technical Field

[0001] The present disclosure relates to the field of charging test, and in particular to a power quality simulation device, a charging test system for electric vehicles, and a method for performing power quality simulation. Background Art

[0002] In practical applications, electric vehicles need to frequently access the power grid for charging. Ideally, the power grid can provide stable and standard power supply signals for electric vehicles, but due to the incompleteness of existing power supply equipment or other reasons, the power supply signals provided by the power grid to electric vehicles will carry various power quality disturbances. Under this premise, in order to improve the charging effect of electric vehicles, it is very important to conduct comprehensive testing and research on the charging effect of electric vehicles when using power supply signals with various power quality disturbances.

[0003] However, the existing power quality simulation device can only simulate a small number of single power quality events specified in the GB / T standard (i.e., the power supply signal contains only a single power quality disturbance), and does not support the composite simulation of multiple different power quality events (i.e., the power supply signal contains multiple different power quality disturbances). For example, the existing power quality simulation devices include the standard power quality source Fluke6105A device generated by Fluke Company in the United States, the three-phase power power calibrator CX1752 i produced by CA Company in France, and the standard power quality source PQC700 a produced by Beijing Bodian Company. These devices have their own characteristics, but none of them can provide comprehensive and convenient composite simulation of all different power quality events.

[0004] Therefore, there is a need for an improved power quality simulation device and related methods to improve the efficiency and effectiveness of power quality simulation and vehicle charging testing. Summary of the invention

[0005] The object of the present disclosure is to provide an improved power quality simulation device, a charging test system for an electric vehicle, a method for performing power quality simulation, a computer-readable storage medium storing computer-readable instructions, and a computer program product including computer-readable instructions.

[0006] According to a first aspect of the present disclosure, there is provided a power quality simulation device for generating test waveform data for power quality testing, the power quality simulation device comprising: a waveform inversion unit configured to generate a first intermediate power supply signal based on user-defined input waveform data; a power quality standard unit configured to generate a second intermediate power supply signal based on setting parameters input by the user; a sampling and conversion unit configured to: collect and sample the first intermediate power supply signal, thereby converting the first intermediate power supply signal into corresponding first waveform data, and / or collect and sample the second intermediate power supply signal, thereby converting the second intermediate power supply signal into corresponding second waveform data; and a main control unit configured to: couple to the waveform inversion unit, the power quality standard unit and the sampling and conversion unit to realize communication between the units and control the operation of the units, and generate the test waveform data for power quality testing based on the first waveform data and / or the second waveform data, wherein the test waveform data includes at least one power quality disturbance.

[0007] In a preferred embodiment, the master control unit also includes: a switch, configured to: receive user-defined input waveform data to provide it to the waveform inversion unit, and control the waveform inversion unit to generate the first intermediate power supply signal, and / or receive user-input setting parameters to provide them to the power quality standard unit, and control the power quality standard unit to generate the second intermediate power supply signal; and a display device for displaying an operation interface of the power quality simulation device, wherein the operation interface enables the user to input the user-defined input waveform data or the setting parameters through a mouse, keyboard, data interface and / or touch screen.

[0008] In a preferred embodiment, generating the test waveform data for performing a power quality test based on the first waveform data and / or the second waveform data includes: analyzing, processing and / or storing the first waveform data and / or the second waveform data to generate the test waveform data for performing a power quality test, the test waveform data being stored and / or output in the form of a test file, wherein the analyzing, processing and / or storing of the first waveform data and / or the second waveform data is at least partially based on default settings or instructions input by a user.

[0009] In a preferred embodiment, the test waveform data enables the simulated power supply to generate a power supply signal containing the at least one power quality disturbance; wherein the power supply signal can be used to charge an electric vehicle; wherein the first intermediate power supply signal, the second intermediate power supply signal and / or the power supply signal include a three-phase voltage signal and / or a three-phase current signal; wherein the first waveform data and / or the second waveform data include a large number of digital data values ​​in the form of discrete points; and / or wherein the at least one power quality disturbance includes at least one or more of the following: harmonics, interharmonics, flicker, surge, voltage\current sag, voltage\current swell, and three-phase imbalance.

[0010] According to a second aspect of the present disclosure, a charging test system for an electric vehicle is provided, comprising: a power quality simulation device as described above, for generating test waveform data for performing a power quality test; a simulation power supply, configured to generate a power supply signal containing at least one power quality disturbance based on the test waveform data; and a charging pile, coupled to the simulation power supply and the electric vehicle for charging the electric vehicle based on the power supply signal.

[0011] According to a third aspect of the present disclosure, a method for performing power quality simulation is provided, for generating test waveform data for performing power quality testing, the method comprising: generating a first intermediate power supply signal based on user-defined input waveform data by a waveform inversion unit, and / or generating a second intermediate power supply signal based on user-set parameters by a power quality standard unit; performing the following operations by a sampling and conversion unit: acquiring and sampling the first intermediate power supply signal, thereby converting the first intermediate power supply signal into corresponding first waveform data, and / or acquiring and sampling the second intermediate power supply signal, thereby converting the second intermediate power supply signal into corresponding second waveform data; and generating the test waveform data for performing power quality testing based on the first waveform data and / or the second waveform data by a master control unit, the test waveform data comprising at least one power quality disturbance, wherein the master control unit is coupled to the waveform inversion unit, the power quality standard unit, and the sampling and conversion unit to realize communication between the units and control the operation of the units.

[0012] In a preferred embodiment, the master control unit includes a switch and a display device, and the method further includes: displaying an operation interface via the display device, wherein the operation interface enables a user to input the user-defined input waveform or the setting parameters through a mouse, keyboard, data interface and / or touch screen; receiving user-defined input waveform data via the switch to provide it to the waveform inversion unit; and / or receiving user-input setting parameters via the switch and providing them to the power quality standard unit.

[0013] In a preferred embodiment, generating the test waveform data for performing a power quality test based on the first waveform data and / or the second waveform data includes: analyzing, processing and / or storing the first waveform data and / or the second waveform data to generate the test waveform data for performing a power quality test, the test waveform data being stored and / or output in the form of a test file, wherein the analyzing, processing and / or storing of the first waveform data and / or the second waveform data is at least partially based on default settings or instructions input by a user.

[0014] In a preferred embodiment, the test waveform data enables the simulated power supply to generate a power supply signal containing the at least one power quality disturbance; wherein the power supply signal can be used to charge an electric vehicle; wherein the first intermediate power supply signal, the second intermediate power supply signal and / or the power supply signal include a three-phase voltage signal and / or a three-phase current signal; wherein the first waveform data and / or the second waveform data include a large number of digital data values ​​in the form of discrete points; and / or wherein the at least one power quality disturbance includes at least one or more of the following: harmonics, interharmonics, flicker, surge, voltage\current sag, voltage\current swell, and three-phase imbalance.

[0015] According to a fourth aspect of the present disclosure, a computer-readable storage medium storing computer-readable instructions is provided. When the computer-readable instructions are executed by a processor of an electronic device, the electronic device executes the method for power quality simulation as described above.

[0016] According to a fifth aspect of the present disclosure, there is provided a computer program product comprising computer-readable instructions, which, when executed by a processor of an electronic device, enables the electronic device to perform the method for power quality simulation as described above.

[0017] The charging test system for an electric vehicle, the power quality simulation device, and the method for performing power quality simulation according to the embodiments of the present disclosure can achieve many advantages.

[0018] First of all, the power quality simulation device according to the embodiment of the present disclosure integrates various components required for generating test waveform data for power quality testing, so that arbitrary test waveform data can be generated conveniently and efficiently according to user needs, thereby effectively improving test efficiency and reducing test costs.

[0019] Second, through the groundbreaking combination of the standard power quality unit and the waveform inversion unit, any type of test waveform data can be customized according to the user's needs, thereby achieving a wider range of power quality test application scenarios.

[0020] Third, in the process of generating the test waveform data, firstly, an intermediate power supply signal is generated based on the relatively ideal input waveform data and / or setting parameters, and the intermediate power supply signal is a real analog power supply signal, and therefore contains various information of the power supply signal. Then, the intermediate power supply signal is sampled to obtain test waveform data containing more comprehensive information. Compared with directly generating the test waveform data based on the input waveform data and / or setting parameters, the digital-to-analog-to-digital conversion disclosed in the present invention enables the generated test waveform data to contain more comprehensive information about the power supply signal, and thus can more realistically simulate the real power supply signal of the power grid.

[0021] Fourth, the power quality simulation device and method according to the embodiments of the present disclosure realize a human-computer interactive control mode of the entire device and method by introducing a master control module including a display device, so that the user can conveniently operate the device or execute the method through general input components (including but not limited to a mouse, keyboard, data interface and / or touch screen, etc.), thereby improving the user experience.

[0022] Other features and advantages of the present disclosure will become more apparent from the following detailed description of exemplary embodiments of the present disclosure with reference to the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] The accompanying drawings, which constitute a part of the specification, illustrate embodiments of the present disclosure and, together with the description, serve to explain the principles of the present disclosure.

[0024] The present disclosure may be more clearly understood from the following detailed description with reference to the accompanying drawings, in which:

[0025] Figure 1 A schematic diagram schematically illustrates a charging environment for an electric vehicle;

[0026] Figure 2 A schematic diagram of a charging test system for an electric vehicle according to an embodiment of the present disclosure is schematically shown;

[0027] Figure 3 The structure diagram of the power quality simulation device according to the embodiment of the present disclosure is schematically shown; and

[0028] Figure 4 An actual product diagram of a power quality simulation device according to an embodiment of the present disclosure is shown.

[0029] Figure 5The flowchart of the method for performing power quality simulation according to the embodiment of the present disclosure is schematically shown.

[0030] Note that in the embodiments described below, sometimes the same reference numerals are used in common between different drawings to represent the same parts or parts with the same functions, and their repeated descriptions are omitted. In some cases, similar numbers and letters are used to represent similar items, so once an item is defined in one drawing, it does not need to be further discussed in subsequent drawings.

[0031] For ease of understanding, the positions, sizes, and ranges of various structures shown in the drawings and the like may not represent actual positions, sizes, and ranges, etc. Therefore, the present disclosure is not limited to the positions, sizes, and ranges disclosed in the drawings and the like. DETAILED DESCRIPTION

[0032] Various exemplary embodiments of the present disclosure will be described in detail below with reference to the accompanying drawings. It should be noted that unless otherwise specifically stated, the relative arrangement of components and steps, numerical expressions and numerical values ​​set forth in these embodiments do not limit the scope of the present disclosure.

[0033] The following description of at least one exemplary embodiment is in fact merely illustrative and is in no way intended to limit the present disclosure and its application or use. That is, the structures and methods herein are shown in an exemplary manner to illustrate different embodiments of the structures and methods in the present disclosure. However, those skilled in the art will appreciate that they merely illustrate exemplary ways of the present disclosure that can be implemented, rather than exhaustive ways. In addition, the drawings need not be drawn to scale, and some features may be enlarged to illustrate the details of specific components.

[0034] Technologies, methods, and apparatus known to ordinary technicians in the relevant field may not be discussed in detail, but where appropriate, such technologies, methods, and apparatus should be considered part of the authorization specification.

[0035] In all examples shown and discussed herein, any specific values ​​should be interpreted as merely exemplary and not as limiting. Therefore, other examples of the exemplary embodiments may have different values.

[0036] Figure 1 The schematic diagram schematically shows the charging environment of an electric vehicle. Figure 1As shown in FIG, the power grid 1 is coupled to the electric vehicle 3 through the charging pile 2, thereby providing electric energy to the electric vehicle 3. Ideally, the power grid 1 will provide a supply voltage / current of, for example, 220V or 380V with a fixed frequency, but in actual applications, the supply voltage / current provided by the power grid 1 may face various power quality events, that is, the supply voltage / current may contain various power quality disturbances, which will affect the charging effect of the electric vehicle, and may even damage the electric vehicle or cause a safety accident.

[0037] To this end, it is necessary to conduct in-depth testing and research on the status of electric vehicles when facing various power quality events.

[0038] Figure 2 The structure diagram of a charging test system 10 for an electric vehicle according to an embodiment of the present disclosure is schematically shown.

[0039] like Figure 2 As shown in the figure, a charging test system 100 for an electric vehicle may include: a power quality simulation device 200, for generating test waveform data for performing a power quality test; a simulation power supply 110, configured to generate a power supply signal including at least one power quality disturbance based on the test waveform data; and a charging pile 120, coupled to the simulation power supply 110 and the electric vehicle for charging the electric vehicle based on the power supply signal.

[0040] In some embodiments of the present disclosure, the analog power supply refers to a device that can generate a power supply signal based on test waveform data, wherein the test waveform data can be, for example, digital data, and the power supply signal can be a continuous analog signal. More specifically, the power supply signal is, for example, a voltage signal or a current signal that can supply power to the device to be charged, which can be a DC signal or an AC signal.

[0041] In some embodiments according to the present disclosure, the power quality simulation device 200 can be coupled to the simulated power supply 110 to directly provide the test waveform data thereto. In other embodiments according to the present disclosure, there is no connection relationship between the power quality simulation device 200 and the simulated power supply 110, and the user can store the test waveform data generated by the power quality simulation device 200 on a removable storage medium (e.g., a mobile hard disk), and then provide the test waveform data to the simulated power supply 110 through the storage medium. In some other embodiments according to the present disclosure, the power quality simulation device 200 and the simulated power supply 110 each include a wireless communication module, so that the power quality simulation device 200 can send the generated test waveform data to the simulated power supply 110 wirelessly.

[0042] Note that although the present application uses charging of electric vehicles as the application scenario, the technology disclosed herein is not limited to this, but can be applied to any charging scenario, especially large equipment that needs to be charged, including but not limited to electric aircraft, ships, large mechanical facilities, etc.

[0043] Figure 3 The structure diagram of the power quality simulation device 200 according to the embodiment of the present disclosure is schematically shown.

[0044] The power quality simulation device 200 according to an embodiment of the present disclosure is used to generate test waveform data for performing power quality testing. Figure 3 As shown in , the power quality simulation device 200 may include a waveform inversion unit 210, a power quality standard unit 220, a sampling and conversion unit 230, and a master control unit 240. The master control unit 240 may be coupled to the waveform inversion unit 210, the power quality standard unit 220, and the sampling and conversion unit 230 to achieve communication between the various units and to control the operation of the various units.

[0045] Continue to refer Figure 3 , the waveform inversion unit 210 can be used to generate a first intermediate power supply signal based on user-defined input waveform data. The power quality standard unit 220 can be used to generate a second intermediate power supply signal based on user-set parameters. The sampling and conversion unit 230 can be used to collect and sample the first intermediate power supply signal, thereby converting the first intermediate power supply signal into corresponding first waveform data, and / or collect and sample the second intermediate power supply signal, thereby converting the second intermediate power supply signal into corresponding second waveform data. The main control unit 240 can control the operation of the waveform inversion unit 210, the power quality standard unit 220, and the sampling and conversion unit 230, so that the above three units can generate the first waveform data and / or the second waveform data. The main control unit 240 can also be used to generate test waveform data for power quality testing based on the first waveform data and / or the first waveform data, and the test waveform data contains at least one power quality disturbance.

[0046] In some embodiments according to the present disclosure, the test waveform data can enable the simulated power supply to generate a power supply signal including at least one power quality disturbance, which can be used to charge an electric vehicle. In a preferred embodiment, the at least one power quality disturbance can include at least one or more of the following: harmonics, interharmonics, flicker, surge, voltage / current sag, voltage / current swell, and three-phase unbalance.

[0047] In some embodiments according to the present disclosure, the first waveform data, the second waveform data and the test waveform data may be discrete digital data, for example, may include a large number of digital data values ​​in the form of discrete points. The power supply signal and the intermediate power supply signal are usually continuous analog signals, for example, may include a three-phase voltage signal and / or a three-phase current signal.

[0048] In some embodiments according to the present disclosure, the intermediate power supply signal is a signal similar to the power supply signal for charging a device to be charged (such as an electric vehicle), but is not used directly for charging, but is used for sampling by the sampling and conversion unit 230 to generate test waveform data. In other words, the intermediate power supply signal is a simulated or analog signal of the power supply signal, which is the same or similar to the power supply signal, but has a different purpose. The intermediate power supply signal contains almost all the characteristics of the power supply signal, especially the various characteristics of the actual power supply signal. The digital test waveform data is obtained based on the sampling of the intermediate power supply signal, which makes the generated test waveform data contain more comprehensive information, so that the real characteristics of the power supply signal can be restored more realistically, and the accuracy of the power quality simulation can be improved.

[0049] In some embodiments according to the present disclosure, the power quality standard unit 220 and the waveform inversion unit 210 are both devices for generating corresponding intermediate power supply signals based on the user's usage requirements, but there are significant differences between the two. The power quality standard unit 220 is used to generate a standard power supply signal related to power quality based on the setting parameters provided by the user, and is more suitable for simulating more common power quality events such as harmonics, interharmonics, surges, flickers, etc. The intermediate power supply signal output by it has high accuracy, so that the corresponding test waveform data also has high accuracy. The function of the waveform inversion unit 210 focuses on waveform inversion (also called waveform playback) based on the user-defined input waveform data, that is, converting the user-defined digital input waveform data into an analog electrical signal output, which has the advantage that any power quality event can be simulated according to the user's needs, providing the possibility for personalized test solutions. The power quality standard unit 220 and the waveform inversion unit 210 each have their own characteristics and complement each other, so that the power quality simulation device 200 of the present disclosure can generate any required test waveform data.

[0050] In some embodiments according to the present disclosure, the power quality standard unit 220 and the waveform inversion unit 210 may be directly connected to the sampling and conversion unit 230 to directly provide the first intermediate power supply signal and the second intermediate power supply signal to be sampled to the sampling and conversion unit 230 under the control of the main control unit 240. In other embodiments according to the present disclosure, the power quality standard unit 220 and the waveform inversion unit 210 may be coupled to the sampling and conversion unit 230 via the main control unit 240 to provide the first intermediate power supply signal and the second intermediate power supply signal to be sampled to the sampling and conversion unit 230 through the main control unit 240.

[0051] In some embodiments according to the present disclosure, the power quality standard unit 220 and the waveform inversion unit 210 are independent units, and both independently provide the corresponding first intermediate power supply signal and the second intermediate power supply signal to the sampling and conversion unit 230, and the sampling and conversion unit 230 separately samples the first intermediate power supply signal and the second intermediate power supply signal to obtain first waveform data and second waveform data, respectively.

[0052] In a preferred embodiment, the sampling and conversion unit 230 may adopt, for example, a Zhongyuan Huadian ZH-5 fault recording device, and the power quality standard unit 220 may adopt, for example, a DANDICKDKLN-1 power quality standard device.

[0053] In some embodiments according to the present disclosure, the master control unit 240 may include a switch 242 for receiving user-defined input waveform data to provide it to the waveform inversion unit 210, and controlling the waveform inversion unit 210 to generate a first intermediate power supply signal; and / or receiving user-input setting parameters to provide it to the power quality standard unit 220, and controlling the power quality standard unit 220 to generate a second intermediate power supply signal.

[0054] In general, the switch 242 in the master control unit 240 can form a communication network with the waveform inversion unit 210, the power quality standard unit 220, and the sampling and conversion unit 230, so that the master control unit 240 has powerful communication capabilities, data processing and analysis capabilities, and data storage capabilities, thereby reducing the difficulty and complexity of the user's direct operation of the device and improving the work efficiency of the test. In a preferred embodiment, the switch 242 can use a TP-LINK TL-SF1005 industrial-grade five-port 100M industrial network switch.

[0055] In a preferred embodiment, the master control unit 240 may include both a switch 242 and a personal computer (PC) to achieve more powerful communication and control functions.

[0056] Although the above embodiment of using a switch to implement the master control unit 240 is given, the present disclosure is not limited thereto. In other embodiments of the present disclosure, Figure 3 The master control unit 110 shown in the figure can be implemented using various suitable electronic devices. The aforementioned suitable electronic devices include, but are not limited to: CPU, hardware microprocessor, hardware processor, multi-core processor, single-core processor, microcontroller, application-specific integrated circuit (ASIC), DSP or other similar processing devices; various implementations of digital circuit systems, analog circuit systems or mixed signal (combination of analog and digital) circuit systems that perform functions in a computing system; and integrated circuits (ICs), parts or circuits of separate processor cores, entire processor cores, separate processors, programmable hardware devices such as field programmable gate arrays (FPGAs), and / or systems including multiple processors, etc.

[0057] In some embodiments according to the present disclosure, the master control unit 240 may further include a display device 244 for displaying an operation interface of the power quality simulation device. The operation interface enables visual operation, that is, enables the user to input user-defined input waveform data or set parameters through a mouse, keyboard, data interface and / or touch screen. The display device 244 makes the use of the entire power quality simulation device 200 more intuitive and convenient, effectively improving the test efficiency.

[0058] In an embodiment according to the present disclosure, generating test waveform data for performing a power quality test based on the first waveform data and / or the second waveform data may include analyzing, processing and / or storing the first waveform data and / or the second waveform data, thereby generating test waveform data for performing a power quality test. The test waveform data is stored and / or output in the form of a test file. In a preferred embodiment, analyzing, processing and / or storing the first waveform data and / or the second waveform data is at least partially based on a default setting or an instruction input by a user.

[0059] In a preferred embodiment, the analysis, processing and / or storage of the first waveform data and / or the second waveform data by the main control unit 240 may include combining the first waveform data and / or the second waveform data, for example, connecting multiple waveform data together in sequence so that the test waveform data contains a variety of different power quality events; it may also include modifying the format of the first waveform data and / or the second waveform data, and storing it in a file format suitable for use in a simulated power supply.

[0060] In a preferred embodiment, the test waveform data may include only processed or unprocessed first waveform data, only processed or unprocessed second waveform data, or both processed or unprocessed first waveform data and processed or unprocessed second waveform data.

[0061] The inventors of the present application have built a practical product of a power quality simulation device based on the concept of the present invention. Figure 4 FIG. 2 shows an actual product diagram of a power quality simulation device according to an embodiment of the present disclosure. Figure 4 As shown in the figure, in the cabinet of the product, from top to bottom, it includes: a master control unit with a display device, a sampling and conversion unit, a power quality standard unit, and a waveform inversion unit. Those skilled in the art will understand that Figure 4 It is merely intended to present a possible implementation of the power quality simulation device according to the embodiment of the present disclosure and is not intended to constitute any limitation.

[0062] Figure 5 The flowchart of the method 300 for performing power quality simulation according to an embodiment of the present disclosure is schematically shown.

[0063] like Figure 5 As shown, a method 300 for performing power quality simulation is provided, which is used to generate test waveform data for performing power quality testing. The method 300 may include steps S310 to S330.

[0064] At step S310 , a first intermediate power supply signal is generated by a waveform inversion unit based on input waveform data defined by a user, and / or a second intermediate power supply signal is generated by a power quality standard unit based on parameters set by a user.

[0065] At step S320, the sampling and conversion unit performs the following operations: collecting and sampling the first intermediate power supply signal, thereby converting the first intermediate power supply signal into corresponding first waveform data, and / or collecting and sampling the second intermediate power supply signal, thereby converting the second intermediate power supply signal into corresponding second waveform data.

[0066] At step S330, the master control unit generates test waveform data for power quality testing based on the first waveform data and / or the second waveform data, wherein the test waveform data includes at least one power quality disturbance. The master control unit may be coupled to the waveform inversion unit, the power quality standard unit, and the sampling and conversion unit to achieve communication between the units and control the operation of the units.

[0067] In some embodiments according to the present disclosure, the master control unit may include a switch and a display device. In this case, continue to refer to Figure 5, method 300 may also optionally include steps S302 and S304.

[0068] At step S302, an operation interface is displayed via a display device, and the operation interface enables a user to input user-defined input waveform data or set parameters through a mouse, keyboard, data interface and / or touch screen.

[0069] At step S304 , user-defined input waveform data is received via the switch and provided to the waveform inversion unit; and / or user-input setting parameters are received via the switch and provided to the power quality standard unit.

[0070] like Figure 5 As shown in , step S302 and step S304 may be performed before step S310. Those skilled in the art will appreciate that step S302 and step S304 shown in dashed boxes are preferred steps of method 300 for power quality simulation, but are not necessary steps.

[0071] In some embodiments according to the present disclosure, step S330 in the method 300 for performing power quality simulation may include, for example, the following operations: analyzing, processing and / or storing the first waveform data and / or the second waveform data, thereby generating test waveform data for performing power quality testing, and the test waveform data may be stored and / or output in the form of a test file. In a preferred embodiment, analyzing, processing and / or storing the first waveform data and / or the second waveform data is at least partially based on a default setting or an instruction input by a user.

[0072] In a preferred embodiment, the test waveform data may enable the simulated power supply to generate a power supply signal including at least one power quality disturbance.

[0073] In a preferred embodiment, the power supply signal can be used to charge an electric vehicle.

[0074] In a preferred embodiment, the first intermediate power supply signal, the second intermediate power supply signal and / or the power supply signal may include a three-phase voltage signal and / or a three-phase current signal.

[0075] In a preferred embodiment, the first waveform data and / or the second waveform data may include a large number of digital data values ​​in the form of discrete points.

[0076] In a preferred embodiment, at least one power quality disturbance may include at least one or more of the following: harmonics, interharmonics, flicker, surge, voltage / current sag, voltage / current swell, and three-phase imbalance.

[0077] In an embodiment according to the present disclosure, Figure 5 The method 300 shown may be performed by Figure 2 The charging test system 10 for electric vehicles shown in the figure can also be used Figure 3 The above-mentioned power quality simulation device 200 is used to perform the above-mentioned Figures 2 to 3 The contents described are applicable to Figure 5 Method 300 is shown.

[0078] According to another aspect of the present disclosure, a computer-readable storage medium storing computer-readable instructions may be provided. When the computer-readable instructions are executed by a processor of an electronic device, the electronic device executes the method for power quality simulation as described above.

[0079] According to another aspect of the present disclosure, a computer program product including computer-readable instructions may be provided. When the computer-readable instructions are executed by a processor of an electronic device, the electronic device executes the method for performing power quality simulation as described above.

[0080] The method according to the present disclosure may be implemented in various appropriate ways such as software, hardware, or a combination of software and hardware.

[0081] The words "front", "rear", "top", "bottom", "above", "below", etc., if present, in the specification and claims are used for descriptive purposes and are not necessarily used to describe invariant relative positions. It should be understood that the words so used are interchangeable under appropriate circumstances, such that the embodiments of the disclosure described herein, for example, are capable of operation in other orientations than those illustrated or otherwise described herein.

[0082] As used herein, the word "exemplary" means "serving as an example, instance, or illustration," rather than as a "model" to be exactly copied. Any implementation described as an example herein is not necessarily to be construed as preferred or advantageous over other implementations. Furthermore, the present disclosure is not limited by any expressed or implied theory given in the above technical field, background technology, summary of the invention, or detailed description.

[0083] As used herein, the term "substantially" is intended to include any minor variations due to design or manufacturing imperfections, device or component tolerances, environmental influences, and / or other factors. The term "substantially" also allows for deviations from a perfect or ideal condition due to parasitic effects, noise, and other practical considerations that may exist in actual implementations.

[0084] In addition, the foregoing description may have referred to elements or nodes or features that are "connected" or "coupled" together. As used herein, unless otherwise expressly stated, "connection" means that one element / node / feature is directly connected (or directly communicates) with another element / node / feature electrically, mechanically, logically or otherwise. Similarly, unless otherwise expressly stated, "coupling" means that one element / node / feature can be mechanically, electrically, logically or otherwise connected to another element / node / feature in a direct or indirect manner to allow interaction, even if the two features may not be directly connected. In other words, "coupling" is intended to include direct and indirect connections of elements or other features, including connections using one or more intermediate elements.

[0085] In addition, the terms "first", "second" and the like may also be used herein for reference purposes only, and thus are not intended to be limiting. For example, the terms "first", "second" and other such numerical terms referring to structures or elements do not imply a sequence or order unless the context clearly indicates otherwise.

[0086] It should also be understood that when the term “include / comprises” is used in this document, it indicates the presence of the specified features, integers, steps, operations, units and / or components, but does not exclude the presence or addition of one or more other features, integers, steps, operations, units and / or components and / or their combinations.

[0087] In this disclosure, the term "provide" is used in a broad sense to cover all ways of obtaining an object, and thus "providing an object" includes but is not limited to "purchasing", "preparing / manufacturing", "arranging / setting up", "installing / assembling", and / or "ordering" an object, etc.

[0088] Those skilled in the art will appreciate that the boundaries between the above operations are merely illustrative. Multiple operations can be combined into a single operation, a single operation can be distributed in additional operations, and operations can be performed at least partially overlapping in time. Moreover, alternative embodiments may include multiple instances of specific operations, and the order of operations may be changed in other various embodiments. However, other modifications, variations, and replacements are equally possible. Therefore, this specification and accompanying drawings should be considered illustrative, not restrictive.

[0089] Although some specific embodiments of the present disclosure have been described in detail by way of example, it should be understood by those skilled in the art that the above examples are for illustration only and are not intended to limit the scope of the present disclosure. The various embodiments disclosed herein may be combined in any manner without departing from the spirit and scope of the present disclosure. It should also be understood by those skilled in the art that various modifications may be made to the embodiments without departing from the scope and spirit of the present disclosure. The scope of the present disclosure is defined by the appended claims.

Claims

1. A power quality simulation device for generating test waveform data for power quality testing, characterized in that: The power quality simulation device comprises: a waveform inversion unit configured to generate a first intermediate power supply signal based on user-defined input waveform data; A power quality standard unit, configured to generate a second intermediate power supply signal based on a setting parameter input by a user; The sampling and conversion unit is configured as: collecting and sampling a first intermediate power supply signal, thereby converting the first intermediate power supply signal into corresponding first waveform data, and / or collecting and sampling the second intermediate power supply signal, thereby converting the second intermediate power supply signal into corresponding second waveform data; and The master control unit is configured as: coupled to the waveform inversion unit, the power quality standard unit, and the sampling and conversion unit to achieve communication between the units and control the operation of the units, and The test waveform data for performing a power quality test is generated based on the first waveform data and / or the second waveform data, and the test waveform data includes at least one power quality disturbance.

2. The power quality simulation device according to claim 1, characterized in that: The master control unit also includes: The switch is configured as: receiving user-defined input waveform data to provide it to the waveform inversion unit, and controlling the waveform inversion unit to generate the first intermediate power supply signal, and / or receiving a setting parameter input by a user to provide it to the power quality standard unit, and controlling the power quality standard unit to generate the second intermediate power supply signal; and A display device is used to display an operation interface of the power quality simulation device, wherein the operation interface enables a user to input the user-defined input waveform data or the setting parameters through a mouse, keyboard, data interface and / or touch screen.

3. The power quality simulation device according to claim 1, characterized in that: Generating the test waveform data for performing a power quality test based on the first waveform data and / or the second waveform data includes: Analyzing, processing and / or storing the first waveform data and / or the second waveform data to generate the test waveform data for power quality testing, wherein the test waveform data is stored and / or output in the form of a test file, Wherein, analyzing, processing and / or storing the first waveform data and / or the second waveform data is at least partially based on default settings or instructions input by a user.

4. The power quality simulation device according to claim 1, characterized in that: in, The test waveform data enables the simulated power supply to generate a power supply signal containing the at least one power quality disturbance, The power supply signal can be used to charge an electric vehicle. Wherein, the first intermediate power supply signal, the second intermediate power supply signal and / or the power supply signal include a three-phase voltage signal and / or a three-phase current signal; Wherein, the first waveform data and / or the second waveform data include a large number of digital data values ​​in the form of discrete points; and / or Among them, the at least one power quality disturbance includes at least one or more of the following: harmonics, interharmonics, flicker, surge, voltage / current sag, voltage / current swell, and three-phase imbalance.

5. A charging test system for an electric vehicle, comprising: The power quality simulation device according to any one of claims 1 to 4, used to generate test waveform data for performing power quality testing; A simulation power supply configured to generate a power supply signal including at least one power quality disturbance based on the test waveform data; as well as A charging station is coupled to the analog power source and the electric vehicle for charging the electric vehicle based on the power supply signal.

6. A method for performing power quality simulation, for generating test waveform data for performing power quality testing, characterized in that: The method comprises: Generate a first intermediate power supply signal based on user-defined input waveform data through a waveform inversion unit, and / or generate a second intermediate power supply signal based on user-set parameters through a power quality standard unit; The following operations are performed by the sampling and conversion unit: collecting and sampling a first intermediate power supply signal, thereby converting the first intermediate power supply signal into corresponding first waveform data, and / or collecting and sampling the second intermediate power supply signal, thereby converting the second intermediate power supply signal into corresponding second waveform data; and The test waveform data for performing power quality testing is generated by a main control unit based on the first waveform data and / or the second waveform data, wherein the test waveform data includes at least one power quality disturbance, wherein the main control unit is coupled to the waveform inversion unit, the power quality standard unit, and the sampling and conversion unit to achieve communication between the various units and control the operation of the various units.

7. The method according to claim 6, characterized in that The master control unit includes a switch and a display device, and the method further includes: Displaying an operation interface via a display device, wherein the operation interface enables a user to input the user-defined input waveform or the setting parameter through a mouse, a keyboard, a data interface and / or a touch screen; receiving user defined input waveform data via a switch to provide it to the waveform inversion unit; and / or The setting parameters input by the user are received via the switch and provided to the power quality standard unit.

8. The method according to claim 6, characterized in that Generating the test waveform data for performing a power quality test based on the first waveform data and / or the second waveform data includes: Analyzing, processing and / or storing the first waveform data and / or the second waveform data to generate the test waveform data for power quality testing, wherein the test waveform data is stored and / or output in the form of a test file, Wherein, analyzing, processing and / or storing the first waveform data and / or the second waveform data is at least partially based on default settings or instructions input by a user.

9. The device according to claim 6, characterized in that in, The test waveform data enables the simulated power supply to generate a power supply signal containing the at least one power quality disturbance, The power supply signal can be used to charge an electric vehicle. Wherein, the first intermediate power supply signal, the second intermediate power supply signal and / or the power supply signal include a three-phase voltage signal and / or a three-phase current signal; Wherein, the first waveform data and / or the second waveform data include a large number of digital data values ​​in the form of discrete points; and / or Among them, the at least one power quality disturbance includes at least one or more of the following: harmonics, interharmonics, flicker, surge, voltage / current sag, voltage / current swell, and three-phase imbalance.

10. A computer-readable storage medium storing computer-readable instructions, wherein when the computer-readable instructions are executed by a processor of an electronic device, the electronic device executes the method according to any one of claims 6 to 9.

11. A computer program product comprising computer-readable instructions, which, when executed by a processor of an electronic device, cause the electronic device to perform the method according to any one of claims 6 to 9.

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