CN106546844A - A kind of inverter checking consistency method and system of photo-voltaic power generation station - Google Patents
A kind of inverter checking consistency method and system of photo-voltaic power generation station Download PDFInfo
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- CN106546844A CN106546844A CN201610907606.2A CN201610907606A CN106546844A CN 106546844 A CN106546844 A CN 106546844A CN 201610907606 A CN201610907606 A CN 201610907606A CN 106546844 A CN106546844 A CN 106546844A
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- 238000000034 method Methods 0.000 title claims abstract description 32
- 238000010248 power generation Methods 0.000 title abstract description 5
- 238000012360 testing method Methods 0.000 claims abstract description 98
- 238000004088 simulation Methods 0.000 claims abstract description 79
- 230000002093 peripheral effect Effects 0.000 claims abstract description 15
- 238000011179 visual inspection Methods 0.000 claims description 3
- 238000001514 detection method Methods 0.000 abstract description 2
- 238000010586 diagram Methods 0.000 description 4
- 238000012986 modification Methods 0.000 description 3
- 230000004048 modification Effects 0.000 description 3
- 230000007547 defect Effects 0.000 description 2
- 238000010998 test method Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000012790 confirmation Methods 0.000 description 1
- 238000012937 correction Methods 0.000 description 1
- 238000011156 evaluation Methods 0.000 description 1
- 230000000007 visual effect Effects 0.000 description 1
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
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Abstract
The invention provides a kind of inverter checking consistency method and system of photo-voltaic power generation station, methods described includes directly verifying inverter to be measured using ocular estimate whether consistent with the main power circuit and peripheral circuit of inverter model machine；HWIL simulation is carried out to inverter to be measured and inverter model machine respectively according to the HWIL simulation model, whether consistent the controller of the two is verified.Compared with prior art, a kind of inverter checking consistency method and system of photo-voltaic power generation station that the present invention is provided, are not required to carry out Site Detection to inverter, while HWIL simulation reduces test period and testing expense.
Description
Technical Field
The invention relates to the technical field of performance evaluation of inverters, in particular to a method and a system for checking consistency of an inverter of a photovoltaic power station.
Background
An inverter is an electronic device that converts direct current into alternating current using a high-frequency bridge circuit, and mainly includes a main power circuit and a control board. When the inverter is applied to a photovoltaic power station, the requirement of GB/T19964 and 2012 'technical regulation for connecting the photovoltaic power station to a power system' needs to be met, so that the safe operation of a power grid is ensured. The inverter needs to be subjected to a type test before being put into a photovoltaic power station, however, the existing photovoltaic power station comprises a large number of inverters, and therefore how to ensure that the performances of all the inverters in the photovoltaic power station are consistent is a problem to be solved urgently in the field of photovoltaic power generation. At present, the consistency of inverters in a photovoltaic power station is mainly checked by a field test method, but the method needs to arrange a large detection device on the field to carry out the test, and has the defects of long test period, high cost and the like.
Disclosure of Invention
In order to overcome the defects of the prior art, the invention provides a method and a system for checking the consistency of an inverter of a photovoltaic power station.
In a first aspect, a technical solution of a method for checking consistency of an inverter of a photovoltaic power plant in the present invention is:
the inverter comprises a control board and a main power circuit, wherein the control board comprises a controller and peripheral circuits thereof; the method comprises the following steps:
directly checking whether a main power circuit and a peripheral circuit of the inverter to be tested and an inverter prototype are consistent by adopting a visual inspection method;
and constructing a semi-physical simulation model, respectively carrying out semi-physical simulation on the inverter to be tested and the inverter prototype according to the semi-physical simulation model, and checking whether the controllers of the inverter to be tested and the inverter prototype are consistent.
Further, the preferred technical scheme provided by the invention is as follows: before checking whether the inverter to be tested is consistent with the inverter model machine or not, the method comprises the following steps:
and performing a type test on the inverter model machine, and judging whether the inverter model machine is qualified or not according to a type test result.
Further, the preferred technical scheme provided by the invention is as follows: the building of the semi-physical simulation model comprises the following steps: constructing a semi-physical simulation model on an RT _ LAB semi-physical simulation platform;
the semi-physical simulation model comprises a main power circuit model and a peripheral circuit model of the inverter prototype.
Further, the preferred technical scheme provided by the invention is as follows: the semi-physical simulation of the inverter prototype comprises the following steps:
and connecting a controller of the inverter prototype with a semi-physical simulation model to form a first inverter, and performing a type test on the first inverter in a test environment of the type test to obtain a type test performance parameter of the controller.
Further, the preferred technical scheme provided by the invention is as follows: the semi-physical simulation of the inverter to be tested comprises the following steps:
and connecting the controller of the inverter to be tested with a semi-physical simulation model to form a second inverter, and performing a type test on the second inverter in the test environment of the type test to obtain the type test performance parameters of the controller.
Further, the preferred technical scheme provided by the invention is as follows: the step of checking whether the controllers of the inverter to be tested and the inverter prototype are consistent comprises the following steps:
comparing the type test performance parameters of the inverter to be tested and the inverter prototype after the semi-physical simulation, and if the type test performance parameters of the inverter to be tested and the inverter prototype are consistent, determining that the inverter to be tested and the inverter prototype are consistent.
In a second aspect, a technical solution of the inverter consistency checking system for a photovoltaic power plant in the present invention is:
the system comprises:
and the semi-physical simulation platform is used for respectively carrying out semi-physical simulation on the inverter to be tested and the inverter prototype and checking whether the controllers of the inverter to be tested and the inverter prototype are consistent.
Further, the preferred technical scheme provided by the invention is as follows:
the semi-physical simulation platform comprises a main power circuit model of the inverter prototype and a peripheral circuit model of the controller of the inverter prototype.
Further, the preferred technical scheme provided by the invention is as follows: the system also comprises a test unit, a first simulation unit, a second simulation unit and a comparison unit;
the test unit is used for carrying out a type test on the inverter model machine and judging whether the inverter model machine is qualified or not according to a type test result;
the first simulation unit is used for connecting a controller of the inverter prototype with a semi-physical simulation model to form a first inverter, and performing a type test on the first inverter in a test environment of the type test to obtain a type test performance parameter of the controller;
the second simulation unit is used for connecting a controller of the inverter to be tested with a semi-physical simulation model to form a second inverter, and performing a type test on the second inverter in a test environment of the type test to obtain a type test performance parameter of the controller;
and the comparison unit is used for comparing the type test performance parameters of the inverter to be tested and the inverter prototype after the semi-physical simulation, and if the type test performance parameters of the inverter to be tested and the inverter prototype are consistent, the inverter to be tested and the inverter prototype are consistent.
Compared with the closest prior art, the invention has the beneficial effects that:
1. according to the inverter consistency checking method for the photovoltaic power station, provided by the invention, whether a main power circuit and a peripheral circuit are consistent or not is checked by adopting an eye test method, whether a controller is consistent or not is checked by adopting semi-physical simulation, the inverter does not need to be detected on site, and meanwhile, the testing period and the testing cost are reduced by adopting the semi-physical simulation;
2. according to the inverter consistency checking system of the photovoltaic power station, the consistency of the controller is checked through the semi-physical simulation platform, and the inverter consistency checking period and cost are reduced.
Drawings
FIG. 1: the implementation flow schematic diagram of the inverter consistency checking method of the photovoltaic power station in the embodiment of the invention;
FIG. 2: the implementation flow schematic diagram of the controller consistency checking method of the inverter in the embodiment of the invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
The following describes a method for checking inverter consistency of a photovoltaic power plant according to an embodiment of the present invention with reference to the accompanying drawings.
Fig. 1 is a schematic implementation flow diagram of a method for checking consistency of an inverter of a photovoltaic power plant according to an embodiment of the present invention, and as shown in the figure, the method may perform consistency checking on the inverter of the photovoltaic power plant according to the following steps, where the inverter includes a control board and a main power circuit, and the control board includes a controller and peripheral circuits thereof. The method specifically comprises the following steps:
step S101: and (3) directly checking whether the main power circuit and the peripheral circuit of the inverter to be tested are consistent with those of the inverter prototype or not by adopting a visual inspection method. In this embodiment, before checking whether the inverter to be tested is consistent with the inverter model machine, it is necessary to determine whether the inverter model machine is a qualified product, specifically, a type test is performed on the inverter model machine, and whether the inverter model machine is qualified is determined according to a type test result.
Step S102: and constructing a semi-physical simulation model, respectively carrying out semi-physical simulation on the inverter to be tested and the inverter prototype according to the semi-physical simulation model, and checking whether the controllers of the inverter to be tested and the inverter prototype are consistent. In the embodiment, a semi-physical simulation model can be constructed on the RT _ LAB semi-physical simulation platform, and comprises a main power circuit model and a peripheral circuit model of an inverter prototype.
In the embodiment, whether the main power circuit is consistent with the peripheral circuit is checked by adopting a visual method, whether the controller is consistent is checked by adopting semi-physical simulation, the inverter does not need to be detected on site, and the testing period and the testing cost are reduced by the semi-physical simulation; meanwhile, in the prior art, a large number of power devices also adopt a functional structure in which a main power circuit and a controller are combined, such as a current converter, a compensator, a current limiter, a circuit breaker, a power flow controller and the like, so that the consistency of the power devices with the above structure can be checked based on the inverter consistency checking method disclosed in this embodiment, and the consistency checking efficiency of the power devices in the power system is improved.
Further, the semi-physical simulation of the inverter prototype in this embodiment may be performed according to the following steps.
In this embodiment, a controller of an inverter prototype is connected to a semi-physical simulation model to form a first inverter, and a type test is performed on the first inverter in a test environment of the type test in step S101 to obtain a type test performance parameter of the controller.
Further, the semi-physical simulation of the inverter to be tested in this embodiment may be performed according to the following steps.
In this embodiment, a controller of the inverter to be tested is connected with the semi-physical simulation model to form a second inverter, and a type test is performed on the second inverter in the test environment of the type test in step S101 to obtain a type test performance parameter of the controller.
Further, checking whether the controllers of the inverter to be tested and the inverter model machine are consistent or not in the embodiment can be implemented according to the following steps.
In the embodiment, the type test performance parameters of the inverter to be tested and the model inverter are compared after the semi-physical simulation, and if the type test performance parameters of the inverter to be tested and the model inverter are consistent, the inverter to be tested and the model inverter are consistent. Semi-physical simulation is carried out on all inverters to be tested extracted from the photovoltaic power station, and the type test performance parameters of all the inverters to be tested are compared with the type test performance parameters of an inverter prototype, so that whether all the inverters to be tested are qualified products can be determined.
The check result of the method for checking the consistency of the inverter of the photovoltaic power plant in the embodiment can be embodied in a report mode, and the result display mode is described below with reference to the accompanying drawings.
Fig. 2 is a schematic diagram of an implementation flow of a method for checking consistency of a controller of an inverter in an embodiment of the present invention, where as shown in the figure, it is first determined whether an inverter model is a qualified product, and when the inverter model is a qualified product, semi-physical simulation is performed on the controller of the inverter model to obtain a controller test report, where the report is used to record type test performance parameters of the controller of the inverter model, and semi-physical simulation is performed on the controller of the inverter to be tested to obtain a controller test report, and the report is used to record type test performance parameters of the controller of the inverter to be tested. And then comparing whether the values of the type test performance parameters in the two test reports are the same, if the values are the same, the inverter to be tested is a qualified product, and then a consistency confirmation report can be made, and if the values are different, the inverter to be tested is a unqualified product, and then a correction report can be made.
The invention also provides a system for checking the consistency of the inverter of the photovoltaic power station, and provides a specific embodiment.
The inverter consistency checking system of the photovoltaic power station in the embodiment comprises a semi-physical simulation platform, and the semi-physical simulation platform can be used for respectively carrying out semi-physical simulation on the inverter to be tested and an inverter prototype and checking whether controllers of the inverter to be tested and the inverter prototype are consistent. The semi-physical simulation platform comprises a main power circuit model of an inverter prototype and a peripheral circuit model of a controller of the semi-physical simulation platform, and whether the inverter prototype is a qualified product needs to be detected through a test unit before the semi-physical simulation platform is built.
In the embodiment, the consistency of the controller is checked through the semi-physical simulation platform, and the inverter consistency checking period and cost are reduced.
Further, the inverter consistency check system in the present embodiment may further include the following configuration.
The inverter consistency checking system of the photovoltaic power generation station in the embodiment may further include a test unit, a first simulation unit, a second simulation unit, and a comparison unit. Wherein,
and the test unit is used for carrying out a type test on the inverter model machine and judging whether the inverter model machine is qualified or not according to a type test result.
And the first simulation unit is used for connecting the controller of the inverter prototype with the semi-physical simulation model to form a first inverter, and performing a type test on the first inverter under the test environment of the type test performed in the test unit to obtain the type test performance parameters of the controller.
And the second simulation unit is used for connecting the controller of the inverter to be tested with the semi-physical simulation model to form a second inverter, and performing a type test on the second inverter in a test environment of the type test performed in the test unit to obtain the type test performance parameters of the controller.
And the comparison unit is used for comparing the type test performance parameters of the inverter to be tested and the inverter prototype after the semi-physical simulation, and if the type test performance parameters of the inverter to be tested and the inverter prototype are consistent, the inverter to be tested and the inverter prototype are consistent.
It will be apparent to those skilled in the art that various changes and modifications may be made in the present invention without departing from the spirit and scope of the invention. Thus, if such modifications and variations of the present invention fall within the scope of the claims of the present invention and their equivalents, the present invention is also intended to include such modifications and variations.
Claims (9)
1. The inverter consistency checking method of the photovoltaic power station comprises a control board and a main power circuit, wherein the control board comprises a controller and peripheral circuits thereof; characterized in that the method comprises:
directly checking whether a main power circuit and a peripheral circuit of the inverter to be tested and an inverter prototype are consistent by adopting a visual inspection method;
and constructing a semi-physical simulation model, respectively carrying out semi-physical simulation on the inverter to be tested and the inverter prototype according to the semi-physical simulation model, and checking whether the controllers of the inverter to be tested and the inverter prototype are consistent.
2. The method for checking the consistency of the inverter of the photovoltaic power station as claimed in claim 1, wherein the step of checking whether the inverter to be tested is consistent with the model inverter comprises the following steps:
and performing a type test on the inverter model machine, and judging whether the inverter model machine is qualified or not according to a type test result.
3. The method for checking the consistency of the inverter of the photovoltaic power station as claimed in claim 1, wherein the constructing the semi-physical simulation model comprises the following steps: constructing a semi-physical simulation model on an RT _ LAB semi-physical simulation platform;
the semi-physical simulation model comprises a main power circuit model and a peripheral circuit model of the inverter prototype.
4. The method for checking the consistency of the inverter of the photovoltaic power station as claimed in claim 2, wherein the semi-physical simulation of the inverter prototype comprises the following steps:
and connecting a controller of the inverter prototype with a semi-physical simulation model to form a first inverter, and performing a type test on the first inverter in a test environment of the type test to obtain a type test performance parameter of the controller.
5. The method for checking the consistency of the inverter of the photovoltaic power station as claimed in claim 2, wherein the semi-physical simulation of the inverter to be tested comprises:
and connecting the controller of the inverter to be tested with a semi-physical simulation model to form a second inverter, and performing a type test on the second inverter in the test environment of the type test to obtain the type test performance parameters of the controller.
6. The method for checking the consistency of the inverter of the photovoltaic power station as claimed in claim 1, wherein the step of checking whether the controllers of the inverter to be tested and the inverter prototype are consistent comprises the following steps:
comparing the type test performance parameters of the inverter to be tested and the inverter prototype after the semi-physical simulation, and if the type test performance parameters of the inverter to be tested and the inverter prototype are consistent, determining that the inverter to be tested and the inverter prototype are consistent.
7. An inverter consistency check system for a photovoltaic power plant, the system comprising:
and the semi-physical simulation platform is used for respectively carrying out semi-physical simulation on the inverter to be tested and the inverter prototype and checking whether the controllers of the inverter to be tested and the inverter prototype are consistent.
8. The inverter consistency check system of a photovoltaic power plant according to claim 7,
the semi-physical simulation platform comprises a main power circuit model of the inverter prototype and a peripheral circuit model of the controller of the inverter prototype.
9. The inverter consistency checking system of the photovoltaic power plant is characterized by further comprising a test unit, a first simulation unit, a second simulation unit and a comparison unit;
the test unit is used for carrying out a type test on the inverter model machine and judging whether the inverter model machine is qualified or not according to a type test result;
the first simulation unit is used for connecting a controller of the inverter prototype with a semi-physical simulation model to form a first inverter, and performing a type test on the first inverter in a test environment of the type test to obtain a type test performance parameter of the controller;
the second simulation unit is used for connecting a controller of the inverter to be tested with a semi-physical simulation model to form a second inverter, and performing a type test on the second inverter in a test environment of the type test to obtain a type test performance parameter of the controller;
and the comparison unit is used for comparing the type test performance parameters of the inverter to be tested and the inverter prototype after the semi-physical simulation, and if the type test performance parameters of the inverter to be tested and the inverter prototype are consistent, the inverter to be tested and the inverter prototype are consistent.
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