CN115407143A - Calibration system and method for energy storage converter - Google Patents
Calibration system and method for energy storage converter Download PDFInfo
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- CN115407143A CN115407143A CN202210988609.9A CN202210988609A CN115407143A CN 115407143 A CN115407143 A CN 115407143A CN 202210988609 A CN202210988609 A CN 202210988609A CN 115407143 A CN115407143 A CN 115407143A
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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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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R19/00—Arrangements for measuring currents or voltages or for indicating presence or sign thereof
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R21/00—Arrangements for measuring electric power or power factor
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L12/00—Data switching networks
- H04L12/02—Details
Abstract
The invention relates to a calibration system and a calibration method for an energy storage converter. Wherein, the calibration system includes: the power supply is connected with the energy storage converter; the measuring instrument is connected with the energy storage converter and is used for measuring the electric power parameters of the energy storage converter and obtaining the standard values of the electric power parameters; the industrial personal computer comprises a first communication interface and a second communication interface, is connected with the measuring instrument through the first communication interface, is connected with the energy storage converter through the second communication interface, and is used for reading the standard value in the measuring instrument and sending the standard value to the energy storage converter; and the energy storage converter is configured to receive the standard value and calculate a correction parameter according to the standard value and the measured value of the power parameter provided by the energy storage converter. The calibration system and method for the energy storage converter do not need manual intervention, and the energy storage converter can be calibrated fully automatically on the premise of not increasing the cost.
Description
Technical Field
The invention mainly relates to the field of new energy, in particular to a calibration system and method for an energy storage converter.
Background
New energy sources such as photovoltaic energy, wind Power energy and the like are greatly developed, and because the new energy sources have unstable characteristics and need to be matched with an energy storage System to obtain stable load supply capacity, the energy storage System is expected to enter a high-speed development stage in the near future, and a Power Conversion System (PCS) which is a core component of the energy storage System becomes particularly important. In the production process, the energy storage converter needs higher measurement precision for measuring voltage and/or current, but due to the difference between chips and circuit devices, a machine sampling generates larger errors, and serious inconsistency exists, so that the energy storage converter produced in each step needs to be calibrated independently.
The current common scheme is that when the energy storage converter is tested, an operator is prompted on a test operation interface, and the operator reads the numerical value of the power parameter (usually including three-phase voltage, three-phase current, power and the like) on the measuring equipment and then manually inputs the numerical value into a window of the power parameter needing to be calibrated. And the industrial personal computer sends the correction parameters to the energy storage converter for storage. The scheme has some defects, on one hand, manual input is needed, a large amount of time is needed when a plurality of groups of data need to be input, and the efficiency of the whole test is seriously influenced when the yield is large; on the other hand, due to manual intervention, the risk of errors is increased, the measurement precision is not enough, the performance of the machine is influenced, the machine is seriously deviated and needs to be reworked, the production cost is increased, and the yield is reduced.
Therefore, there is a need for a calibration system and method that can be used for automatic calibration of energy storage converters.
Disclosure of Invention
The present invention is directed to solving the above problems and providing a calibration system and method for a storage converter.
In order to solve the above technical problem, the present application provides a calibration system for an energy storage converter, the calibration system comprising: the power supply is connected with the energy storage converter; the measuring instrument is connected with the energy storage converter and is used for measuring the electric parameters of the energy storage converter to obtain standard values of the electric parameters; the industrial personal computer comprises a first communication interface and a second communication interface, is connected with the measuring instrument through the first communication interface, is connected with the energy storage converter through the second communication interface, and is used for reading the standard value in the measuring instrument and sending the standard value to the energy storage converter; and the energy storage converter is configured to receive the standard value and calculate a correction parameter according to the standard value and the measured value of the power parameter provided by the energy storage converter.
In an embodiment of the present invention, the industrial personal computer is further configured to read calibration states of the energy storage converter, where the calibration states include calibrated and uncalibrated states.
In one embodiment of the invention, when the calibration state is not calibrated, the industrial personal computer sends a calibration starting instruction to the energy storage converter, and the energy storage converter starts to operate according to the calibration starting instruction; and when the calibration state is calibrated, ending the calibration.
In an embodiment of the invention, the energy storage converter is further configured to store the correction parameter and update the calibration status of the energy storage converter to be calibrated.
In an embodiment of the present invention, the standard values include a first standard value of the power parameter when the energy storage converter starts to operate and a second standard value of the power parameter when the energy storage converter stably operates, and the measured values include a first measured value of the power parameter when the energy storage converter starts to operate and a second measured value of the power parameter when the energy storage converter stably operates.
In an embodiment of the invention, the correction parameter includes a null shift correction, and calculating the null shift correction includes subtracting the first measurement value from the first standard value to obtain the null shift correction.
In an embodiment of the invention, the correction parameter comprises a ratio correction, and calculating the ratio correction comprises dividing the second standard value by the second measured value to obtain the ratio correction.
In an embodiment of the invention, the energy storage converter is further configured to obtain a calibration measurement value according to the correction parameter and the measurement value.
In an embodiment of the present invention, the industrial personal computer is further configured to read the standard value and the calibration measurement value, and determine whether an error between the standard value and the calibration measurement value is greater than a first threshold, and if so, send an erase instruction to the energy storage converter to update the calibration state of the energy storage converter to be uncalibrated.
In an embodiment of the invention, the industrial personal computer further comprises a third communication interface, and the industrial personal computer is connected with the power supply through the third communication interface.
In an embodiment of the present invention, the industrial personal computer is further configured to send a power supply startup instruction to the power supply, where the power supply startup instruction is used to control the power supply to start up.
In order to solve the above technical problem, the present application provides a calibration method for an energy storage converter, including: the control end sends a reading instruction to read the calibration state of the energy storage converter, wherein the calibration state comprises calibrated state and uncalibrated state; the control end judges whether the calibration state is calibrated or not, and if not, a calibration starting instruction is sent to the energy storage converter, wherein the calibration starting instruction is used for controlling the energy storage converter to start to operate; the control end reads a standard value of the power parameter of the energy storage converter and sends the standard value to the energy storage converter; and the energy storage converter receives the standard value and calculates a correction parameter according to the standard value and the measured value of the power parameter provided by the energy storage converter.
In an embodiment of the present invention, the method further includes the step of storing the correction parameter by the energy storage converter and updating the calibration status of the energy storage converter to be calibrated.
In an embodiment of the present invention, the energy storage converter further obtains a calibration measurement value according to the correction parameter and the measurement value.
In an embodiment of the present invention, the method further includes that the control end reads the standard value and the calibration measurement value, and determines whether an error between the standard value and the calibration measurement value is greater than a first threshold, and if so, sends an erase instruction to the energy storage converter to update the calibration state of the energy storage converter to be uncalibrated.
Compared with the prior art, the technical scheme of the application has the following beneficial effects:
the calibration system for the energy storage converter provided by the invention does not need manual intervention, realizes full-automatic calibration of the energy storage converter on the premise of not increasing the cost, improves the production efficiency and improves the reliability; the energy storage converter automatically calculates and corrects errors after obtaining the standard value and the measured value, so that the calculation efficiency is improved, and the time required by calibration is reduced.
Drawings
In order to make the aforementioned objects, features and advantages of the present invention comprehensible, embodiments accompanied with figures are described in detail below, wherein:
fig. 1 is a system block diagram of a calibration system for an energy storage converter according to an embodiment of the present invention;
fig. 2 is a flowchart of a calibration method for a power converter according to an embodiment of the invention.
Detailed Description
In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings used in the description of the embodiments will be briefly introduced below. It is obvious that the drawings in the following description are only examples or embodiments of the application, from which the application can also be applied to other similar scenarios without inventive effort for a person skilled in the art. Unless otherwise apparent from the context, or otherwise indicated, like reference numbers in the figures refer to the same structure or operation.
As used in this application and in the claims, the terms "a," "an," "the," and/or "the" are not intended to be inclusive in the singular, but rather are intended to include the plural, unless the context clearly dictates otherwise. In general, the terms "comprises" and "comprising" merely indicate that steps and elements are included which are explicitly identified, that the steps and elements do not form an exclusive list, and that a method or apparatus may include other steps or elements.
The relative arrangement of the components and steps, the numerical expressions, and numerical values set forth in these embodiments do not limit the scope of the present application unless specifically stated otherwise. Meanwhile, it should be understood that the sizes of the respective portions shown in the drawings are not drawn in an actual proportional relationship for the convenience of description. Techniques, methods, and apparatus known to one of ordinary skill in the relevant art may not be discussed in detail but are intended to be part of the specification where appropriate. In all examples shown and discussed herein, any particular value should be construed as exemplary only and not as limiting. Thus, other examples of the exemplary embodiments may have different values. It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, further discussion thereof is not required in subsequent figures.
In the description of the present application, it is to be understood that the directions or positional relationships indicated by the directional terms such as "front, rear, upper, lower, left, right", "lateral, vertical, horizontal" and "top, bottom", etc., are generally based on the directions or positional relationships shown in the drawings, and are for convenience of description and simplicity of description only, and in the case of not making a reverse description, these directional terms do not indicate and imply that the device or element being referred to must have a particular orientation or be constructed and operated in a particular orientation, and therefore should not be construed as limiting the scope of the present application; the terms "inner and outer" refer to the inner and outer relative to the profile of the respective component itself.
For ease of description, spatially relative terms such as "over 8230," "upper surface," "above," and the like may be used herein to describe the spatial positional relationship of one device or feature to other devices or features as illustrated in the figures. It will be understood that the spatially relative terms are intended to encompass different orientations of the device in use or operation in addition to the orientation depicted in the figures. For example, if a device in the figures is turned over, devices described as "above" or "on" other devices or configurations would then be oriented "below" or "under" the other devices or configurations. Thus, the exemplary terms "at 8230; \8230; 'above" may include both orientations "at 8230; \8230;' above 8230; 'at 8230;' below 8230;" above ". The device may be otherwise variously oriented (rotated 90 degrees or at other orientations) and the spatially relative descriptors used herein interpreted accordingly.
It should be noted that the terms "first", "second", and the like are used to define the components, and are only used for convenience of distinguishing the corresponding components, and the terms have no special meanings unless otherwise stated, and therefore, the scope of protection of the present application is not to be construed as being limited. Further, although the terms used in the present application are selected from publicly known and used terms, some of the terms mentioned in the specification of the present application may be selected by the applicant at his or her discretion, the detailed meanings of which are described in relevant parts of the description herein. Further, it is required that the present application is understood not only by the actual terms used but also by the meaning of each term lying within.
It will be understood that when an element is referred to as being "on," "connected to," "coupled to" or "contacting" another element, it can be directly on, connected or coupled to, or contacting the other element or intervening elements may be present. In contrast, when an element is referred to as being "directly on," "directly connected to," "directly coupled to" or "directly contacting" another element, there are no intervening elements present. Similarly, when a first component is said to be "in electrical contact with" or "electrically coupled to" a second component, there is an electrical path between the first component and the second component that allows current to flow. The electrical path may include capacitors, coupled inductors, and/or other components that allow current to flow even without direct contact between the conductive components.
Flow charts are used herein to illustrate operations performed by systems according to embodiments of the present application. It should be understood that the preceding or following operations are not necessarily performed in the exact order in which they are performed. Rather, various steps may be processed in reverse order or simultaneously. At the same time, other operations are either added to or removed from these processes.
Fig. 1 is a system block diagram of a calibration system 100 for an energy storage converter according to an embodiment of the present invention. As shown in fig. 1, a calibration system 100 for an energy storage converter includes an energy storage converter 10, a power supply 11, a measurement instrument 12, and an industrial control computer 13. The power supply 11 is connected to the energy storage converter 10 for supplying power to the energy storage converter 10. The measuring instrument 12 is connected to the storage converter 10. The measuring instrument 12 is used for measuring the standard value of the power parameter of the energy storage converter 10. The industrial personal computer 13 is respectively connected with the measuring instrument 12 and the energy storage converter 10. The industrial personal computer 13 includes a first communication interface and a second communication interface. In this embodiment, the first communication interface is an ethernet interface, and the first communication interface of the industrial personal computer 13 is connected to the energy storage converter 10 through an ethernet S1. The second communication interface is a 485 interface. And a second communication interface of the industrial personal computer 13 is connected with the measuring instrument 12 through an RS485 bus S2. The industrial personal computer 13 is used for reading the standard value of the power parameter in the measuring instrument 12 and sending the standard value to the energy storage converter 10 through the Ethernet S1. The energy storage converter 10 is configured to receive the reference values and to calculate correction parameters based on the reference values and the measured values of the electrical parameters provided by itself.
In some embodiments, the industrial personal computer 13 further comprises a third communication interface, which may be a 485 interface. As shown in fig. 1, a third communication interface of the industrial personal computer 13 is connected to the power supply 11 through an RS485 bus S3, and the industrial personal computer 13 is configured to control the power on of the power supply 11. Before the energy storage current device 10 is calibrated, the industrial personal computer 13 sends a power supply startup instruction to the power supply 11, wherein the power supply startup instruction comprises power supply parameters. After the power supply 11 is started, power is supplied to the energy storage current device 10, the energy storage current device 10 is powered on, after reasonable delay, the industrial personal computer 13 is connected with the energy storage current device 10 through the Ethernet S1, TCP communication is established, and at the moment, the energy storage current device 10 is in a standby state and does not start to operate.
In some embodiments, the energy storage converter 10 displays its calibration status through a flag bit, for example, a flag bit value of 0 indicates that the calibration status of the energy storage converter is not calibrated, and a flag bit value of 1 indicates that the calibration status of the energy storage converter is calibrated. The industrial personal computer 13 is further configured to read a calibration state of the energy storage converter 10, and when the calibration state is calibrated, the calibration is finished. When the calibration state is not calibrated, the industrial personal computer 13 sends a calibration starting instruction to the energy storage converter 10, the energy storage converter 10 starts to operate according to the calibration starting instruction, and the energy storage converter 10 stably operates after a period of time. The energy storage converter 10 records a first measured value of the power parameter at the start of operation and a second measured value of the power parameter at the steady operation, respectively. The industrial personal computer 13 respectively reads a first standard value of the power parameter when the energy storage converter 10 on the measuring instrument 12 starts to operate and a second standard value of the power parameter when the energy storage converter 10 stably operates. The industrial personal computer 13 sends the first standard value and the second standard value to the energy storage converter 10; the energy storage converter 10 receives the first standard value and the second standard value, and calculates a correction parameter according to the first standard value, the second standard value, and the first measured value and the second measured value of the power parameter provided by itself.
In some embodiments, the correction parameter comprises a null shift correction. The step of calculating the zero drift correction by the energy storage converter 10 includes subtracting the first measured value from the first standard value of the power parameter when the energy storage converter 10 starts to operate to obtain the zero drift correction. The above steps can be expressed by the following formula:
X 1 ＝S 1 –V 1
wherein X 1 For null shift correction, S 1 Is a first standard value, V 1 Is the first measurement.
In some embodiments, the correction parameter comprises a ratio correction. The step of calculating the transformation ratio correction by the energy storage converter 10 includes dividing a second standard value of the power parameter when the energy storage converter 10 is in stable operation by a second measured value to obtain the transformation ratio correction, and the step can be expressed by a formula as follows:
X 2 ＝S 2 /V 2
wherein, X 2 For ratio correction, S 2 Second standard value, V 2 Is the second measurement.
As shown in fig. 1, after the energy storage converter 10 calculates the correction parameter, it is further configured to obtain a calibration measurement value according to the correction parameter and the measurement value.
When the correction parameter comprises only a ratio correction, the step of calculating the calibration measurement may be expressed by the formula:
V c ＝X 2 *V 2
wherein, V c Is a calibration measurement value, V 2 Is a second measured value, X 2 For the ratio correction.
When the correction parameters include a ratio correction and a null shift correction, the step of calculating the calibration measurement can be expressed by the formula:
V c ＝X 2 *(V 2 +X 1 )
wherein, V c Is a calibration measurement value, V 2 Is a second measured value, X 1 For null shift correction, X 2 For ratio correction.
In some embodiments, the energy storage converter 10 is further configured to store the correction parameter and update the calibration status of the energy storage converter 10 to calibrated. The energy storage converter 10 may store the correction parameters in its own memory unit (not shown), which is a non-volatile memory.
In some embodiments, the industrial personal computer 13 is further configured to read the standard value and the calibration measurement value of the energy storage converter 10, and calculate an error of the standard value and the calibration measurement value. If the error is greater than the first threshold value, the industrial personal computer 13 sends an erasing instruction to erase the correction coefficient in the storage unit of the energy storage converter 10 and erase the value of the flag bit of the energy storage converter 10, so that the calibration state of the energy storage converter 10 is updated to be uncalibrated. The industrial personal computer 13 reads the calibration state of the energy storage converter 10 again, and since the calibration state of the energy storage converter 10 after the erasure is not calibrated, the industrial personal computer 13 restarts to calibrate the energy storage converter 10. And if the error is less than or equal to the first threshold value, ending the calibration. The value of the first threshold may be set as desired, and the present application is not limited thereto.
In some embodiments, the industrial personal computer 13 repeatedly reads N times (N > 1) the standard value of the power parameter on the measuring instrument 12 and sends the standard value to the energy storage converter 10. The energy storage converter 10 takes an average value of the standard values of N times as a final standard value, and the energy storage converter 10 calculates a correction parameter according to the final standard value and a measured value of the power parameter provided by the energy storage converter. The standard values of the power parameters are repeatedly read for N times, and the average value of the standard values for N times is taken as the final standard value, so that the precision of the calibration system is improved.
The calibration system for the energy storage converter provided by the invention does not need manual intervention, realizes full-automatic calibration of the energy storage converter on the premise of not increasing the cost, improves the production efficiency and improves the reliability; the energy storage converter automatically calculates and corrects errors after obtaining the standard value and the measured value, so that the calculation efficiency is improved, and the time required by calibration is reduced.
The present invention also provides a calibration method for an energy storage converter, which can be implemented by the calibration system 100 for an energy storage converter in the foregoing, or can be implemented by other systems or hardware devices. For a detailed description of the calibration method for the energy storage converter, reference may be made to the description of the calibration system 100 for the energy storage converter, which is not described herein again.
Fig. 2 is a flowchart of a calibration method 200 for an energy storage converter according to an embodiment of the invention. As shown in fig. 2, a calibration method 200 for a storage converter includes powering the storage converter;
step S201: and the control terminal sends a reading instruction to read the calibration state of the energy storage converter, wherein the calibration state comprises calibrated state and uncalibrated state. The control end can be an industrial personal computer of the calibration system 100 for the energy storage converter, and can also be other control equipment, and the type of the control end is not limited in the application.
Step S202: and the control end judges whether the calibration state of the energy storage converter is calibrated or not. If the calibration state of the energy storage converter is calibrated, ending the calibration; if not, go to step S203.
Step S203: and the control end sends a calibration starting instruction to the energy storage converter. The energy storage converter starts to operate after receiving the calibration starting instruction, and the energy storage converter stably operates after a period of time. The time from the beginning of operation to stable operation of energy storage converter is not restricted by this application.
Step S204: and the control end reads the standard value of the power parameter of the energy storage converter and sends the standard value to the energy storage converter. In the invention, the standard value of the power parameter of the energy storage converter can be stored at the local end or the cloud end. Correspondingly, the standard value of the power parameter of the energy storage converter can be read from the local end, the standard value of the power parameter of the energy storage converter can also be read from the cloud end, and the method for reading the standard value of the power parameter of the energy storage converter is not limited. In some embodiments, in order to make the standard value of the power parameter sent to the energy storage converter more accurate, the standard value of the power parameter is repeatedly read N times (N > 1) and sent to the energy storage converter N times. And the energy storage converter takes the average value of the standard values for N times as a final standard value, and calculates the correction parameters according to the final standard value and the measured value of the power parameter provided by the energy storage converter.
Step S205: the energy storage converter receives the standard value and calculates a correction parameter according to the standard value and the measured value of the power parameter provided by the energy storage converter. In some embodiments, the standard values comprise a first standard value when the energy storage converter starts to operate and a second standard value when the energy storage converter stably operates, and the measured values comprise a first measured value when the energy storage converter starts to operate and a second measured value when the energy storage converter stably operates. In some embodiments, the correction parameter comprises a null shift correction, and calculating the null shift correction comprises subtracting the first measurement value from the first criterion value to obtain the null shift correction. In some embodiments, the correction parameter comprises a ratio correction, and calculating the ratio correction comprises dividing the second standard value by the second measured value to obtain the ratio correction.
In some embodiments, the calibration method for the energy storage converter further comprises the energy storage converter storing the correction parameter and updating the calibration status of the energy storage converter to calibrated.
In some embodiments, the calibration method for the energy storage converter further comprises the step of obtaining a calibration measurement value by the energy storage converter according to the correction parameter and the measurement value.
In some embodiments, the calibration method for the energy storage converter further comprises the step that the control end reads the standard value and the calibration measured value, judges whether the error between the standard value and the calibration measured value is larger than a first threshold value, and if so, sends an erasing instruction to the energy storage converter to update the calibration state of the energy storage converter to be uncalibrated.
It should be understood that the above-described embodiments are illustrative only. This application uses specific words to describe embodiments of the application. Reference to "one embodiment," "an embodiment," and/or "some embodiments" means a feature, structure, or characteristic described in connection with at least one embodiment of the application. Therefore, it is emphasized and should be appreciated that two or more references to "an embodiment" or "one embodiment" or "an alternative embodiment" in various places throughout this specification are not necessarily all referring to the same embodiment. Furthermore, certain features, structures, or characteristics may be combined as suitable in one or more embodiments of the application.
Numerals describing the number of components, attributes, etc. are used in some embodiments, it being understood that such numerals used in the description of the embodiments are modified in some instances by the use of the modifier "about", "approximately" or "substantially". Unless otherwise indicated, "about", "approximately" or "substantially" indicates that the number allows a variation of ± 20%. Accordingly, in some embodiments, the numerical parameters used in the specification and claims are approximations that may vary depending upon the desired properties of the individual embodiments. In some embodiments, the numerical parameter should take into account the specified significant digits and employ a general digit-preserving approach. Notwithstanding that the numerical ranges and parameters setting forth the broad scope of the range are approximations, in the specific examples, such numerical values are set forth as precisely as possible within the scope of the application.
Having thus described the basic concept, it will be apparent to those skilled in the art that the foregoing disclosure is by way of example only, and is not intended to limit the present application. Various modifications, improvements and adaptations to the present application may occur to those skilled in the art, although not explicitly described herein. Such modifications, improvements and adaptations are proposed in the present application and thus fall within the spirit and scope of the exemplary embodiments of the present application.
Claims (15)
1. A calibration system for a power converter, comprising:
the power supply is connected with the energy storage converter;
the measuring instrument is connected with the energy storage converter and is used for measuring the electric parameters of the energy storage converter to obtain standard values of the electric parameters;
the industrial personal computer comprises a first communication interface and a second communication interface, is connected with the measuring instrument through the first communication interface, is connected with the energy storage converter through the second communication interface, and is used for reading the standard value in the measuring instrument and sending the standard value to the energy storage converter;
and the energy storage converter is configured to receive the standard value and calculate a correction parameter according to the standard value and the measured value of the power parameter provided by the energy storage converter.
2. The calibration system of claim 1, wherein the industrial personal computer is further configured to read calibration status of the energy storage converter, the calibration status including calibrated and uncalibrated.
3. The calibration system of claim 2, wherein when the calibration state is not calibrated, the industrial personal computer sends a calibration starting instruction to the energy storage converter, and the energy storage converter starts to operate according to the calibration starting instruction; and when the calibration state is calibrated, ending the calibration.
4. The calibration system of claim 2, wherein the energy storage converter is further configured to store the correction parameter and update the calibration status of the energy storage converter to calibrated.
5. The calibration system of claim 1 wherein said calibration values comprise first calibration values for said electrical parameter at a beginning of operation of said energy storage converter and second calibration values for said electrical parameter at a steady state operation of said energy storage converter and said measurement values comprise first measurement values for said electrical parameter at a beginning of operation of said energy storage converter and second measurement values for said electrical parameter at a steady state operation of said energy storage converter.
6. The calibration system of claim 5, wherein the correction parameter comprises a null shift correction, and wherein calculating the null shift correction comprises subtracting the first measurement value from the first standard value to obtain the null shift correction.
7. The calibration system of claim 5, wherein the correction parameter comprises a ratio correction, and wherein calculating the ratio correction comprises dividing the second standard value by the second measured value to obtain the ratio correction.
8. The calibration system of claim 1 wherein said energy storage converter is further configured to obtain calibration measurements based on said correction parameter and said measurements.
9. The calibration system of claim 8, wherein the industrial personal computer is further configured to read the standard value and the calibration measurement value, determine whether an error between the standard value and the calibration measurement value is greater than a first threshold value, and if so, send an erase command to the energy storage converter to update the calibration state of the energy storage converter to be uncalibrated.
10. The calibration system of claim 1, wherein the industrial computer further comprises a third communication interface, the industrial computer being connected to the power supply through the third communication interface.
11. The calibration system of claim 10, wherein the industrial personal computer is further configured to send a power-on command to the power supply, the power-on command being used to control the power supply to turn on.
12. A calibration method for a power converter, comprising:
the control end sends a reading instruction to read the calibration state of the energy storage converter, wherein the calibration state comprises calibrated state and uncalibrated state;
the control end judges whether the calibration state is calibrated or not, and if not, a calibration starting instruction is sent to the energy storage converter, wherein the calibration starting instruction is used for controlling the energy storage converter to start to operate;
the control end reads a standard value of the power parameter of the energy storage converter and sends the standard value to the energy storage converter;
and the energy storage converter receives the standard value and calculates a correction parameter according to the standard value and the measured value of the power parameter provided by the energy storage converter.
13. The calibration method of claim 12, further comprising: and the energy storage converter stores the correction parameters and updates the calibration state of the energy storage converter to be calibrated.
14. The calibration method of claim 12, further comprising: and the energy storage converter obtains a calibration measured value according to the correction parameter and the measured value.
15. The calibration method of claim 14, further comprising: and the control end reads the standard value and the calibration measured value, judges whether the error between the standard value and the calibration measured value is larger than a first threshold value or not, and sends an erasing instruction to the energy storage converter to update the calibration state of the energy storage converter to be uncalibrated if the error between the standard value and the calibration measured value is larger than the first threshold value.
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117129371A (en) * | 2023-10-27 | 2023-11-28 | 宁德时代新能源科技股份有限公司 | Calibration method and device for surface density measuring instrument and readable storage medium |
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2022
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117129371A (en) * | 2023-10-27 | 2023-11-28 | 宁德时代新能源科技股份有限公司 | Calibration method and device for surface density measuring instrument and readable storage medium |
| CN117129371B (en) * | 2023-10-27 | 2024-04-09 | 宁德时代新能源科技股份有限公司 | Calibration method and device for surface density measuring instrument and readable storage medium |
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