CN116430221A - Test data simulation method, system, medium and test system for photovoltaic grid-connected circuit breaker - Google Patents
Test data simulation method, system, medium and test system for photovoltaic grid-connected circuit breaker Download PDFInfo
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Abstract
The application provides a photovoltaic grid-connected breaker test data simulation method, a system, a medium and a test system, wherein the method comprises the following steps: outputting test current to the photovoltaic grid-connected circuit breaker; synchronously extracting the test current in real time to acquire an actual current output waveform; performing error comparison on a current setting waveform and the current actual output waveform to correct the test current according to a comparison result, so that the current setting waveform is consistent with the current actual output waveform, and simulating the test current input to the photovoltaic grid-connected circuit breaker; according to the method and the device, the output primary current is synchronously extracted in real time to obtain the actual current output waveform, and then the actual current output waveform is compared with the current setting waveform in error, so that the output test current is corrected according to comparison results, the consistency of the actual current output waveform and the current setting waveform is ensured, and the current output precision is improved.
Description
Technical Field
The application belongs to the field of photovoltaic power generation, relates to a photovoltaic grid-connected breaker testing technology, and particularly relates to a photovoltaic grid-connected breaker testing data simulation method, a system, a medium and a testing system.
Background
The hardware circuit of the existing test system transmits load side impedance to a source side in an up-flow CT impedance transmission mode, current output of the source side adopts a current feedback mode, and a high-precision high-current is obtained by driving a high-current MOS tube (power amplifier) to generate a nonlinear voltage and driving a load loop through a fast-response non-static-difference automatic feedback control circuit.
However, due to the leakage inductance of the transformer, primary high-precision current generated by the power amplifier cannot accurately flow up to one large current according to the turn ratio of the transformer.
When the load characteristics of the equipment to be tested are transferred to the source side through the transformer in the testing process, the nonlinearity in the transfer process of the transformer can influence the output precision, and when equipment of different factories is tested, the difference of the load characteristics can cause small precision difference deviation.
Disclosure of Invention
The application aims to provide a simulation method, a simulation system, a simulation medium and a simulation system for test data of a photovoltaic grid-connected circuit breaker, which are used for solving the problems pointed out in the background art.
In a first aspect, the present application provides a method for simulating test data of a photovoltaic grid-connected breaker, which is applied to a test system of the photovoltaic grid-connected breaker, and the method for simulating test data of the photovoltaic grid-connected breaker includes: outputting test current to the photovoltaic grid-connected circuit breaker; synchronously extracting the test current in real time to acquire an actual current output waveform; and comparing the error of the current setting waveform with the actual current output waveform, so as to correct the test current according to the comparison result, and enabling the current setting waveform to be consistent with the actual current output waveform, thereby realizing simulation of the test current input to the photovoltaic grid-connected circuit breaker.
In the method, the current actual output waveform is obtained by synchronously extracting the output primary current in real time, and then, the current actual output waveform is compared with the current setting waveform in error, so that the output test current is corrected according to comparison results, the consistency of the current actual output waveform and the current setting waveform is ensured, and the current output precision is further improved.
In an implementation manner of the first aspect, the correcting the test current according to the comparison result includes: obtaining compensation parameters according to the comparison result; the compensation coefficient is the difference value between the current setting waveform and the current actual output waveform; the compensation parameter is added to the test current to effect correction of the test current.
In an implementation manner of the first aspect, after the step of obtaining the compensation parameter according to the comparison result, the test data simulation method of the photovoltaic grid-connected breaker further includes: and storing the compensation parameters so as to correct the test current by utilizing the compensation parameters when the test current is output to the photovoltaic grid-connected circuit breaker next time, and outputting the corrected test current to the photovoltaic grid-connected circuit breaker.
In an implementation manner of the first aspect, the performing real-time stoping on the test current synchronization includes: and synchronously extracting the test current of a preset cycle in real time.
In the implementation mode, the actual output waveform of the current is obtained according to the preset test current of the cycle by extracting the preset test current of the cycle in real time, so that the accuracy and the reliability of the obtained actual output waveform of the current are improved.
In a second aspect, the present application provides a photovoltaic grid-connected breaker test data simulation system, applied to a photovoltaic grid-connected breaker test system, the photovoltaic grid-connected breaker test data simulation system includes: the output module is used for outputting the test current to the photovoltaic grid-connected circuit breaker; the acquisition module is used for synchronously extracting the test current in real time to acquire the actual output waveform of the current; and the correction module is used for comparing the error of the current setting waveform with the actual current output waveform so as to correct the test current according to the comparison result, so that the current setting waveform is consistent with the actual current output waveform, and the simulation of the test current input to the photovoltaic grid-connected circuit breaker is realized.
In a third aspect, the present application provides a photovoltaic grid-connected circuit breaker testing system, the photovoltaic grid-connected circuit breaker testing system comprising: a memory for storing a computer program; and the processor is used for executing the computer program stored in the memory so as to enable the photovoltaic grid-connected breaker testing system to execute the photovoltaic grid-connected breaker testing data simulation method.
In a fourth aspect, the present application provides a computer readable storage medium having stored thereon a computer program which when executed by a photovoltaic grid-tie breaker testing system implements the above-described photovoltaic grid-tie breaker test data simulation method.
In a fifth aspect, the present application provides a photovoltaic grid-connected breaker test data simulation system, the photovoltaic grid-connected breaker test data simulation system comprising: photovoltaic grid-connected circuit breaker and the photovoltaic grid-connected circuit breaker testing system; the photovoltaic grid-connected circuit breaker testing system is connected with the photovoltaic grid-connected circuit breaker and used for outputting testing current to the photovoltaic grid-connected circuit breaker.
In one implementation manner of the fifth aspect, the photovoltaic grid-connected circuit breaker is taken as a load side; the photovoltaic grid-connected breaker test data simulation system further comprises: a source side; the source side is connected with the photovoltaic grid-connected breaker testing system and used for inputting source current to the photovoltaic grid-connected breaker testing system.
As described above, the photovoltaic grid-connected circuit breaker test data simulation method, system, medium and test system have the following beneficial effects:
compared with the prior art, the method and the device have the advantages that the extraction CT is used for carrying out high-precision high-speed real-time extraction on the output primary current synchronously, error comparison is carried out on the actual output waveform of the current and the current setting waveform through calculation of a preset cycle, then the output signal is corrected, and the consistency of the output signal and the setting signal is ensured.
Drawings
Fig. 1 shows a schematic diagram of a test data simulation method for a photovoltaic grid-connected breaker according to an embodiment of the present application.
Fig. 2 is a flowchart of a test data simulation method for a photovoltaic grid-connected breaker according to an embodiment of the present application.
Fig. 3 is a flowchart illustrating the correction of the test current according to the comparison result according to the embodiment of the present application.
Fig. 4 is a schematic structural diagram of a test data simulation system of a photovoltaic grid-connected circuit breaker according to an embodiment of the present application.
Fig. 5 is a schematic structural diagram of a test data simulation system for a photovoltaic grid-connected breaker according to another embodiment of the present application.
Description of the reference numerals
Detailed Description
Other advantages and effects of the present application will become apparent to those skilled in the art from the present disclosure, when the following description of the embodiments is taken in conjunction with the accompanying drawings. The present application may be embodied or carried out in other specific embodiments, and the details of the present application may be modified or changed from various points of view and applications without departing from the spirit of the present application. It should be noted that the following embodiments and features in the embodiments may be combined with each other without conflict.
It should be noted that, the illustrations provided in the following embodiments merely illustrate the basic concepts of the application by way of illustration, and only the components related to the application are shown in the drawings and are not drawn according to the number, shape and size of the components in actual implementation, and the form, number and proportion of the components in actual implementation may be arbitrarily changed, and the layout of the components may be more complex.
See fig. 1-5. Compared with the prior art, the method and the system for simulating the test data of the photovoltaic grid-connected circuit breaker, the medium and the test system synchronously perform high-precision and high-speed real-time stoping on output primary current by using stoping CT, compare the actual output waveform of the current with the current setting waveform through calculation of a preset cycle, correct the output signal and ensure the consistency of the output signal and the setting signal.
As shown in fig. 1, in an embodiment, the method for simulating the test data of the photovoltaic grid-connected circuit breaker provided by the application is applied to the test system of the photovoltaic grid-connected circuit breaker in fig. 1.
As shown in fig. 1, the test system uses stoping CT to synchronously output primary current and perform high-precision high-speed real-time stoping, performs error comparison on an actual output waveform and a set waveform through calculation of several cycles, and then corrects an output signal, thereby ensuring consistency of the output signal and the set signal.
In this embodiment, when the test system is first output after being started, output correction is performed according to the characteristics of a load (herein referred to as a "photovoltaic grid-connected breaker") through several cycles, the compensation parameter is stored in the memory, and when the test system is second output, the compensation parameter is directly applied, so that the precision is provided when the test system is started.
It should be noted that, during waveform inversion, the degree of similarity between the output waveform and the source waveform is ensured by the hardware feedback and software feedback technology.
On the basis, the fault inversion test system presets fault scenes such as short circuit, grounding, misoperation prevention and the like, verifies fault research and judgment, processing functions and performance of the photovoltaic grid-connected circuit breaker, and is used for verifying the fault processing capacity of single equipment.
The following describes the technical solutions in the embodiments of the present application in detail with reference to the drawings in the embodiments of the present application.
As shown in fig. 2, the present embodiment provides a method for simulating test data of a photovoltaic grid-connected breaker, which is applied to a test system of the photovoltaic grid-connected breaker, and the method for simulating test data of the photovoltaic grid-connected breaker includes:
and S1, outputting test current to the photovoltaic grid-connected circuit breaker.
In an embodiment, before the step of outputting the test current to the photovoltaic grid-connected breaker, the photovoltaic grid-connected breaker test data simulation method further includes: a source current input at a source side is received.
In this embodiment, the photovoltaic grid-connected breaker is used as a load side, and the photovoltaic grid-connected breaker test system receives a source current from a source side and then outputs a test current to the photovoltaic grid-connected breaker.
The hardware circuit of the photovoltaic grid-connected breaker testing system transmits load side impedance to a source side in an up-flow CT impedance transmission mode, current output of the source side adopts a current feedback mode, and a high-precision high-current is obtained by driving a high-current MOS tube (power amplifier) to generate nonlinear voltage and driving a load loop through a fast-response non-static-difference automatic feedback control circuit.
And S2, synchronously extracting the test current in real time to acquire an actual current output waveform.
In one embodiment, the real-time stoping of the test current synchronization includes: and synchronously extracting the test current of a preset cycle in real time.
The number of the preset items is not limited to the specific number, and may be set according to the specific application scenario in practical applications.
In one embodiment, the average processing is performed on the test current of the preset cycles recovered in real time, so as to obtain the actual output waveform of the current.
And S3, comparing errors of the current setting waveform and the current actual output waveform to correct the test current according to a comparison result, so that the current setting waveform is consistent with the current actual output waveform, and simulation of the test current input to the photovoltaic grid-connected circuit breaker is realized.
In one embodiment, the current setting waveform is a waveform of the source current.
As shown in fig. 3, in an embodiment, the correcting the test current according to the comparison result includes:
and S31, acquiring compensation parameters according to the comparison result.
In one embodiment, the difference between the current setting waveform and the current actual output waveform is used as the compensation parameter.
Step S32, adding the compensation parameter to the test current to correct the test current.
The photovoltaic grid-connected breaker testing system synchronously performs high-precision and high-speed real-time stoping on the output primary test current by using stoping CT while outputting the primary current, and obtains the actual output waveform of the current through calculation of a preset cycle; and finally, correcting the test current output by the photovoltaic grid-connected breaker test system based on the comparison result, thereby ensuring the consistency of the test current output by the photovoltaic grid-connected breaker test system and the current setting waveform.
In an embodiment, after the step of obtaining the compensation parameter according to the comparison result, the test data simulation method for the photovoltaic grid-connected breaker further includes: and storing the compensation parameters so as to correct the test current by utilizing the compensation parameters when the test current is output to the photovoltaic grid-connected circuit breaker next time, and outputting the corrected test current to the photovoltaic grid-connected circuit breaker.
It should be noted that when the test current is output for the first time after the photovoltaic grid-connected breaker test system is started, output correction is performed according to the characteristics of the photovoltaic grid-connected breaker through a preset cycle, meanwhile, compensation parameters for correction are stored in the memory, when the test current is output for the second time, the compensation parameters are directly applied, and the starting output is accurate.
During waveform inversion, the high similarity of the output waveform and the source waveform is ensured by the hardware feedback and software feedback technology.
According to the simulation method for the test data of the photovoltaic grid-connected circuit breaker, the output primary current is synchronously extracted in real time to obtain the actual current output waveform, and then the actual current output waveform is subjected to error comparison with the current setting waveform, so that the output test current is corrected according to comparison results, the consistency of the actual current output waveform and the current setting waveform is ensured, and the current output precision is improved.
The protection scope of the test data simulation method for the photovoltaic grid-connected circuit breaker is not limited to the execution sequence of the steps listed in the embodiment, and all the schemes realized by step increase, step decrease and step replacement according to the prior art made by the principle of the application are included in the protection scope of the application.
The embodiment of the application also provides a photovoltaic grid-connected circuit breaker test data simulation system, which can realize the photovoltaic grid-connected circuit breaker test data simulation method, but the implementation device of the photovoltaic grid-connected circuit breaker test data simulation method comprises but is not limited to the structure of the photovoltaic grid-connected circuit breaker test data simulation system listed in the embodiment, and all the structural deformation and replacement of the prior art according to the principles of the application are included in the protection scope of the application.
As shown in fig. 4, the present embodiment provides a photovoltaic grid-connected breaker test data simulation system, which is applied to a photovoltaic grid-connected breaker test system, and the photovoltaic grid-connected breaker test data simulation system includes:
and the output module 41 is used for outputting the test current to the photovoltaic grid-connected circuit breaker.
And the acquisition module 42 is used for synchronously extracting the test current in real time to acquire the actual output waveform of the current.
And the correction module 43 is configured to perform error comparison on the current setting waveform and the current actual output waveform, so as to correct the test current according to the comparison result, so that the current setting waveform is consistent with the current actual output waveform, and simulate the test current input to the photovoltaic grid-connected circuit breaker.
It should be noted that the structures and principles of the output module 41, the obtaining module 42 and the correcting module 43 are in one-to-one correspondence with the steps (step S1 to step S3) in the above-mentioned test data simulation method of the photovoltaic grid-connected circuit breaker, and the specific working principle thereof may refer to the description of the test data simulation method of the photovoltaic grid-connected circuit breaker in the foregoing embodiment, so that the description thereof will not be repeated here.
As shown in fig. 5, the present embodiment provides a test data simulation system for a photovoltaic grid-connected breaker, where the test data simulation system for a photovoltaic grid-connected breaker includes: photovoltaic grid-tie circuit breaker 51 and photovoltaic grid-tie circuit breaker test system 52 described above.
Specifically, the photovoltaic grid-connected breaker testing system 52 is connected to the photovoltaic grid-connected breaker 51, and is configured to output a test current to the photovoltaic grid-connected breaker 51.
In one embodiment, the photovoltaic grid-connected breaker 51 is used as a load side; the photovoltaic grid-connected breaker test data simulation system further comprises: a source side 53.
Specifically, the source side 53 is connected to the photovoltaic grid-connected breaker testing system 52 for inputting a source current to the photovoltaic grid-connected breaker testing system 52.
In the several embodiments provided in this application, it should be understood that the disclosed systems, apparatuses, or methods may be implemented in other manners. For example, the apparatus embodiments described above are merely illustrative, e.g., the division of modules/units is merely a logical function division, and there may be additional divisions when actually implemented, e.g., multiple modules or units may be combined or integrated into another system, or some features may be omitted or not performed. Alternatively, the coupling or direct coupling or communication connection shown or discussed with each other may be an indirect coupling or communication connection via some interfaces, devices or modules or units, which may be in electrical, mechanical or other forms.
The modules/units illustrated as separate components may or may not be physically separate, and components shown as modules/units may or may not be physical modules, i.e., may be located in one place, or may be distributed over a plurality of network elements. Some or all of the modules/units may be selected according to actual needs to achieve the purposes of the embodiments of the present application. For example, functional modules/units in various embodiments of the present application may be integrated into one processing module, or each module/unit may exist alone physically, or two or more modules/units may be integrated into one module/unit.
Those of ordinary skill would further appreciate that the elements and algorithm steps of the examples described in connection with the embodiments disclosed herein may be embodied in electronic hardware, in computer software, or in a combination of the two, and that the elements and steps of the examples have been generally described in terms of function in the foregoing description to clearly illustrate the interchangeability of hardware and software. Whether such functionality is implemented as hardware or software depends upon the particular application and design constraints imposed on the solution. Skilled artisans may implement the described functionality in varying ways for each particular application, but such implementation decisions should not be interpreted as causing a departure from the scope of the present application.
The embodiment provides a photovoltaic grid-connected breaker test system, the photovoltaic grid-connected breaker test system includes: a memory for storing a computer program; and the processor is used for executing the computer program stored in the memory so as to enable the photovoltaic grid-connected breaker testing system to execute the photovoltaic grid-connected breaker testing data simulation method.
The present embodiment provides a computer-readable storage medium having stored thereon a computer program that, when executed by a photovoltaic grid-connected breaker testing system, implements the above-described photovoltaic grid-connected breaker test data simulation method.
Those of ordinary skill in the art will appreciate that all or part of the steps in the method implementing the above embodiments may be implemented by a program to instruct a processor, where the program may be stored in a computer readable storage medium, where the storage medium is a non-transitory (non-transitory) medium, such as a random access memory, a read only memory, a flash memory, a hard disk, a solid state disk, a magnetic tape (magnetic tape), a floppy disk (floppy disk), an optical disk (optical disk), and any combination thereof. The storage media may be any available media that can be accessed by a computer or a data storage device such as a server, data center, or the like that contains an integration of one or more available media. The usable medium may be a magnetic medium (e.g., a floppy disk, a hard disk, a magnetic tape), an optical medium (e.g., a digital video disc (digital video disc, DVD)), or a semiconductor medium (e.g., a Solid State Disk (SSD)), or the like.
The descriptions of the processes or structures corresponding to the drawings have emphasis, and the descriptions of other processes or structures may be referred to for the parts of a certain process or structure that are not described in detail.
The foregoing embodiments are merely illustrative of the principles of the present application and their effectiveness, and are not intended to limit the application. Modifications and variations may be made to the above-described embodiments by those of ordinary skill in the art without departing from the spirit and scope of the present application. Accordingly, it is intended that all equivalent modifications and variations which may be accomplished by persons skilled in the art without departing from the spirit and technical spirit of the disclosure be covered by the claims of this application.
Claims (9)
1. The test data simulation method for the photovoltaic grid-connected circuit breaker is applied to a test system of the photovoltaic grid-connected circuit breaker and is characterized by comprising the following steps of:
outputting test current to the photovoltaic grid-connected circuit breaker;
synchronously extracting the test current in real time to acquire an actual current output waveform;
and comparing the error of the current setting waveform with the actual current output waveform, so as to correct the test current according to the comparison result, and enabling the current setting waveform to be consistent with the actual current output waveform, thereby realizing simulation of the test current input to the photovoltaic grid-connected circuit breaker.
2. The method for simulating test data of a photovoltaic grid-connected circuit breaker according to claim 1, wherein the correcting the test current according to the comparison result comprises:
obtaining compensation parameters according to the comparison result; the compensation coefficient is the difference value between the current setting waveform and the current actual output waveform;
the compensation parameter is added to the test current to effect correction of the test current.
3. The method for simulating test data of a photovoltaic grid-connected circuit breaker according to claim 2, wherein after the step of acquiring compensation parameters according to the comparison result, the method for simulating test data of a photovoltaic grid-connected circuit breaker further comprises:
and storing the compensation parameters so as to correct the test current by utilizing the compensation parameters when the test current is output to the photovoltaic grid-connected circuit breaker next time, and outputting the corrected test current to the photovoltaic grid-connected circuit breaker.
4. The method for simulating test data of a photovoltaic grid-connected circuit breaker according to claim 1, wherein the step of synchronously extracting the test current in real time comprises the steps of: and synchronously extracting the test current of a preset cycle in real time.
5. The utility model provides a photovoltaic grid-connected breaker test data analog system, is applied to photovoltaic grid-connected breaker test system, its characterized in that, photovoltaic grid-connected breaker test data analog system includes:
the output module is used for outputting the test current to the photovoltaic grid-connected circuit breaker;
the acquisition module is used for synchronously extracting the test current in real time to acquire the actual output waveform of the current;
and the correction module is used for comparing the error of the current setting waveform with the actual current output waveform so as to correct the test current according to the comparison result, so that the current setting waveform is consistent with the actual current output waveform, and the simulation of the test current input to the photovoltaic grid-connected circuit breaker is realized.
6. A photovoltaic grid-tie circuit breaker testing system, the photovoltaic grid-tie circuit breaker testing system comprising:
a memory for storing a computer program;
a processor for executing the computer program stored by the memory to cause the photovoltaic grid-tie breaker testing system to perform the photovoltaic grid-tie breaker test data simulation method of any one of claims 1 to 4.
7. A computer readable storage medium having stored thereon a computer program, characterized in that the program when executed by a photovoltaic grid-connected circuit breaker testing system implements the photovoltaic grid-connected circuit breaker test data simulation method of any one of claims 1 to 4.
8. The utility model provides a photovoltaic grid-connected breaker test data simulation system which characterized in that, photovoltaic grid-connected breaker test data simulation system includes:
a photovoltaic grid-connected circuit breaker and the photovoltaic grid-connected circuit breaker test system of claim 6;
the photovoltaic grid-connected circuit breaker testing system is connected with the photovoltaic grid-connected circuit breaker and used for outputting testing current to the photovoltaic grid-connected circuit breaker.
9. The photovoltaic grid-tie circuit breaker test data simulation system of claim 8, wherein the photovoltaic grid-tie circuit breaker is a load side; the photovoltaic grid-connected breaker test data simulation system further comprises: a source side;
the source side is connected with the photovoltaic grid-connected breaker testing system and used for inputting source current to the photovoltaic grid-connected breaker testing system.
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