CN115833256A - Control method and device suitable for inertia support of grid-connected power electronic converter - Google Patents
Control method and device suitable for inertia support of grid-connected power electronic converter Download PDFInfo
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Abstract
The control method suitable for the inertia support of the grid-connected power electronic converter is used for processing the acquired frequency data and frequency reference data of a grid-connected point of the power electronic converter to obtain inertia compensation data, the inertia compensation data is used as compensation quantity of the power electronic converter to obtain current inner ring reference data, and the operation of the power electronic converter is controlled according to the current inner ring reference data and second current data, so that the power electronic converter has inertia support, a grid-following type control strategy of the grid-connected converter does not need to be transformed into a grid-forming type control strategy, and the method is simple and practical; the technical problems that the existing grid-connected power electronic converter of the new energy distributed power generation system needs to realize an inertia supporting function, needs to be modified, and is high in modification cost are solved.
Description
Technical Field
The application relates to the technical field of power grids, in particular to a control method, a device and equipment suitable for inertia support of a grid-connected power electronic converter.
Background
Under the background that high-proportion renewable energy and high-proportion power electronic equipment are connected to the network, the characteristics of inertia and damping reduction of the power grid occur. The new energy distributed power generation system is mainly connected to a power grid through a grid-connected converter, and the control mode of a power electronic converter determines the characteristics of the power grid, so that the inertia provided by the converter is limited compared with that of a traditional thermal power generating unit. For example: taking the field of electric vehicle charging piles as an example, with the development of electric vehicles and quick charging technologies, the power of the direct-current charging and discharging piles is gradually increased, and the high-power charging pile is used as an impact load, so that the inertia and damping characteristics of a local microgrid of the new energy distributed power generation system can be further reduced.
In addition, in recent years, new energy grid-connected converters mainly including photovoltaic inverters, wind power converters and energy storage converters have gradually increased network access proportion, but most of the traditional grid-connected converters are grid-following type control strategies, the grid-following type control strategies have no inertia support function, and the research on the inertia support method of the grid-connected power electronic converter is attractive. The conditions required by inertia support require an energy source capable of performing rapid power control. The network following type control strategy refers to that the dq conversion angle sent into the voltage and current double-loop control unit is obtained from the voltage of a grid-connected point measured by a phase-locked loop, and therefore the network following type control strategy is called as a network following type.
A grid-connected converter in a traditional power generation system is generally connected to a relatively stable power grid environment, and a grid-forming strategy is not needed. At present, a new energy distributed power generation system adopts a network-forming control strategy to realize an inertia support function, but the equipment transformation difficulty of the network-forming control strategy is high, the network-forming control technology is not mature, and the transformation cost of the whole control strategy is high simply for enabling a grid-connected converter to have the inertia support function.
Disclosure of Invention
The embodiment of the application provides a control method, a control device and control equipment suitable for inertia support of a grid-connected power electronic converter, which are applied to a new energy distributed power generation system and used for solving the technical problems that the inertia support function of the grid-connected power electronic converter of the existing new energy distributed power generation system needs to be realized, the system equipment needs to be modified and the modification cost is high.
In order to achieve the above object, the embodiments of the present application provide the following technical solutions:
the control method suitable for the inertia support of the grid-connected power electronic converter is applied to a new energy distributed power generation system, the new energy distributed power generation system comprises an alternating current port, a power electronic converter and a direct current port which are sequentially connected, the power electronic converter comprises an alternating current converter, an intermediate capacitor and a direct current converter which are sequentially connected, and the control method suitable for the inertia support of the grid-connected power electronic converter comprises the following steps:
acquiring frequency data, reactive power measurement data, frequency reference data and reactive power reference data of a grid-connected point of the power electronic converter, and acquiring a direct-current voltage reference value and a direct-current voltage measured value of an intermediate capacitor;
determining inertia compensation data according to the frequency data and the frequency reference data; obtaining first current data and second current data by adopting voltage and current double-loop control according to the reactive power reference data, the reactive power measurement data, the direct current voltage reference value and the direct current voltage measurement value;
compensating the first current data by adopting the inertia compensation data to obtain current inner ring reference data;
and generating a PWM signal through a current inner loop control and modulation link according to the current inner loop reference data and the second current data, and controlling the operation of the grid-connected power electronic converter by adopting the PWM signal so as to realize the inertia support of the grid-connected power electronic converter.
Preferably, determining inertia compensation data from the frequency data and the frequency reference data comprises: calculating according to the frequency data and the frequency reference data to obtain a frequency parameter; and performing gain link and integral link processing on the frequency parameters to obtain inertia compensation data.
Preferably, calculating a frequency parameter from the frequency data and the frequency reference data comprises: and calculating the difference between the frequency data and the frequency reference data to obtain a frequency parameter.
Preferably, the compensating the first current data by using the inertia compensation data to obtain current inner loop reference data includes: and adding the inertia compensation data and the first current data to obtain current inner loop reference data.
The application also provides a control device suitable for the inertia support of the grid-connected power electronic converter, which is applied to a new energy distributed power generation system, wherein the new energy distributed power generation system comprises an alternating current port, a power electronic converter and a direct current port which are sequentially connected, the power electronic converter comprises an alternating current converter, an intermediate capacitor and a direct current converter which are sequentially connected, and the control device suitable for the inertia support of the grid-connected power electronic converter comprises a data acquisition module, a data processing module, a data compensation module and a control module;
the data acquisition module is used for acquiring frequency data, reactive power measurement data, frequency reference data and reactive power reference data of a grid-connected point of the power electronic converter, and acquiring a direct-current voltage reference value and a direct-current voltage measurement value of the intermediate capacitor;
the data processing module is used for determining inertia compensation data according to the frequency data and the frequency reference data; obtaining first current data and second current data by adopting voltage and current double-loop control according to the reactive power reference data, the reactive power measurement data, the direct current voltage reference value and the direct current voltage measurement value;
the data compensation module is used for compensating the first current data by adopting the inertia compensation data to obtain current inner ring reference data;
and the control module is used for generating PWM signals through a current inner ring control and modulation link according to the current inner ring reference data and the second current data, and controlling the operation of the grid-connected power electronic converter by adopting the PWM signals so as to realize the inertia support of the grid-connected power electronic converter.
Preferably, the data processing module is further configured to calculate according to the frequency data and the frequency reference data to obtain a frequency parameter; and performing gain link and integral link processing on the frequency parameters to obtain inertia compensation data.
Preferably, the data processing module is further configured to perform difference calculation on the frequency data and the frequency reference data to obtain a frequency parameter.
Preferably, the data compensation module is further configured to add the inertia compensation data and the first current data to obtain current inner loop reference data.
The present application also provides a storage device having stored therein a plurality of program codes adapted to be loaded and run by a processor to perform the above-described control method adapted for grid-connected power electronic converter inertia support.
The application also provides a terminal device, which comprises a processor and a memory;
the memory is used for storing program codes and transmitting the program codes to the processor;
the processor is used for executing the control method suitable for the inertia support of the grid-connected power electronic converter according to the instructions in the program codes.
According to the technical scheme, the embodiment of the application has the following advantages: the control method, the device and the equipment suitable for the inertia support of the grid-connected power electronic converter are applied to a new energy distributed power generation system, and the method comprises the steps of obtaining frequency data, reactive power measurement data, frequency reference data and reactive power reference data of a grid-connected point of the power electronic converter, and obtaining a direct current voltage reference value and a direct current voltage measurement value of an intermediate capacitor; determining inertia compensation data according to the frequency data and the frequency reference data; obtaining first current data and second current data by adopting voltage and current double-loop control according to the reactive power reference data, the reactive power measurement data, the direct current voltage reference value and the direct current voltage measurement value; compensating the first current data by adopting inertia compensation data to obtain current inner loop reference data; and generating a PWM signal through a current inner ring control and modulation link according to the current inner ring reference data and the second current data, and controlling the operation of the grid-connected power electronic converter by adopting the PWM signal so as to realize the inertia support of the grid-connected power electronic converter. The control method suitable for the inertia support of the grid-connected power electronic converter processes the acquired frequency data and frequency reference data of the grid-connected point of the power electronic converter to obtain inertia compensation data, the inertia compensation data is used as compensation quantity of the power electronic converter to obtain current inner ring reference data, and the operation of the power electronic converter is controlled according to the current inner ring reference data and second current data, so that the power electronic converter has inertia support, a grid following type control strategy of the grid-connected converter does not need to be transformed into a grid forming type control strategy, and the method is simple and practical; the technical problems that the existing grid-connected power electronic converter of the new energy distributed power generation system needs to realize an inertia supporting function, the system equipment needs to be modified, and the modification cost is high are solved.
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In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings needed to be used in the description of the embodiments or the prior art will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present application, and it is obvious for those skilled in the art that other drawings can be obtained according to the drawings without inventive exercise.
Fig. 1 is a flowchart illustrating steps of a control method for an inertia support of a grid-connected power electronic converter according to an embodiment of the present application;
fig. 2 is an electrical framework diagram of a new energy distributed power generation system in the control method for inertia support of a grid-connected power electronic converter according to the embodiment of the present application;
fig. 3 is a block diagram of a control device suitable for an inertia support of a grid-connected power electronic converter according to an embodiment of the present application.
Detailed Description
In order to make the objects, features and advantages of the present invention more apparent and understandable, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present application, and it is apparent that the embodiments described below are only a part of the embodiments of the present application, and not all of the embodiments. 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 application.
The embodiment of the application provides a control method, a control device and control equipment suitable for inertia support of a grid-connected power electronic converter, which are applied to a new energy distributed power generation system and used for solving the technical problems that the inertia support function of the grid-connected power electronic converter of the existing new energy distributed power generation system needs to be realized, the system equipment needs to be modified and the modification cost is high. The control method, the device and the equipment suitable for the inertia support of the grid-connected power electronic converter can also be suitable for an energy storage converter or a V2G charging and discharging pile.
The first embodiment is as follows:
fig. 1 is a flowchart of steps of a control method suitable for an inertia support of a grid-connected power electronic converter according to an embodiment of the present disclosure, and fig. 2 is an electrical framework diagram of a new energy distributed power generation system in the control method suitable for the inertia support of the grid-connected power electronic converter according to the embodiment of the present disclosure.
As shown in fig. 2, an embodiment of the present application provides a control method suitable for an inertia support of a grid-connected power electronic converter, and the control method is applied to a new energy distributed power generation system, where the new energy distributed power generation system includes an ac port, a power electronic converter, and a dc port that are connected in sequence, and the power electronic converter includes an ac converter, an intermediate capacitor, and a dc converter that are connected in sequence.
A grid-connected point of the power electronic converter is provided between the ac port and the ac converter. The AC converter may be an AC/DC converter and the DC converter may be a DC/DC converter.
As shown in fig. 1, the control method suitable for the inertia support of the grid-connected power electronic converter includes the following steps:
s1, acquiring frequency data, reactive power measurement data, frequency reference data and reactive power reference data of a grid-connected point of the power electronic converter, and acquiring a direct current voltage reference value and a direct current voltage measured value of the intermediate capacitor.
In step S1, acquiring power parameters of the power electronic converter, that is, acquiring frequency data f _ pll, reactive power measurement data Q _ measure, frequency reference data f _ ref, and reactive power reference data Q _ ref of a grid-connected point of the power electronic converter through a phase-locked loop; and secondly, acquiring a direct-current voltage reference value Udc _ ref and a direct-current voltage measured value Udc _ measure of an intermediate capacitor Cdc in the power electronic converter. In the present embodiment, in the power system, the operation of the power electronic converter adopts voltage-current dual-loop control.
S2, determining inertia compensation data according to the frequency data and the frequency reference data; and obtaining first current data and second current data by adopting voltage and current double-loop control according to the reactive power reference data, the reactive power measurement data, the direct current voltage reference value and the direct current voltage measurement value.
In step S2, firstly, frequency data of power parameters in the power electronic converter and frequency reference data are processed to obtain inertia compensation data; and secondly, processing reactive power reference data, reactive power measurement data, direct current voltage reference values and direct current voltage measurement values of power parameters in the power electronic converter to obtain first current data and second current data. In this embodiment, the reactive power reference data and the reactive power measurement data are processed by the PI controller through the power outer loop to obtain second current data; and processing the direct current voltage reference value and the direct current voltage measured value through a voltage outer ring by a PI controller to obtain first current data. Among them, it is a mature technology in the field of power system (for example, CN106058861 a) that the power outer loop processes data through the PI controller and the voltage outer loop processes data through the PI controller to obtain current data, and the detailed description is omitted here.
Further, determining the inertia compensation data from the frequency data and the frequency reference data comprises: calculating according to the frequency data and the frequency reference data to obtain a frequency parameter; and performing gain link and integral link processing on the frequency parameters to obtain inertia compensation data. Wherein calculating the frequency parameter from the frequency data and the frequency reference data comprises: and performing difference calculation on the frequency data and the frequency reference data to obtain a frequency parameter.
It should be noted that the inertia compensation data is a frequency parameter obtained from a difference between the frequency data and the frequency reference data, and the inertia compensation data is obtained by processing the frequency parameter through a gain element and an integration element.
In the embodiment of the present application, determining the gain factor in the gain element processing includes:
acquiring electrical parameters of the power electronic converter, wherein the electrical parameters comprise a voltage rated value of a grid-connected point of the power electronic converter, a rated modulation ratio of the power electronic converter, a rated voltage of an intermediate capacitor and a reactance of an alternating-current side filter of the alternating-current converter;
and calculating by adopting a gain calculation formula according to the electrical parameters to obtain a gain coefficient.
It should be noted that the gain calculation formula is:
wherein k is a gain coefficient, e pcc0 For voltage rating of grid-connected points of power electronic converters, m 0 Is the rated modulation ratio, U, of the power electronic converter 0 Is the rated voltage of the intermediate capacitor, X f Is a.c. transformerReactance of the ac side filter of the converter.
And S3, compensating the first current data by adopting the inertia compensation data to obtain current inner ring reference data.
In step S3, the inertia compensation data and the first current data are added to obtain current inner loop reference data.
And S4, generating a PWM signal through a current inner ring control and modulation link according to the current inner ring reference data and the second current data, and controlling the operation of the grid-connected power electronic converter by adopting the PWM signal so as to realize the inertia support of the grid-connected power electronic converter.
It should be noted that, in step S4, the generation of the PWM signal by the data processing of the current inner loop control and modulation link is a mature technology in the field of power systems, and the generation of the PWM signal by the data processing of the current inner loop control and modulation link is explained in the book "power electronics technology" of Xu Dehong, or "power electronics technology" of Wang Zhaoan, or "power electronics technology" of Ruan Xinbo in southern aviation, and so on, which refer to the book of Zhejiang, where the book describes that the data processing of the current inner loop control and modulation link is related to the generation of the PWM signal, and therefore, the details thereof are not described herein.
The control method is applied to a new energy distributed power generation system and comprises the steps of obtaining frequency data, reactive power measurement data, frequency reference data and reactive power reference data of a grid-connected point of a power electronic converter, and obtaining a direct current voltage reference value and a direct current voltage measurement value of an intermediate capacitor; determining inertia compensation data according to the frequency data and the frequency reference data; obtaining first current data and second current data by adopting voltage and current double-loop control according to the reactive power reference data, the reactive power measurement data, the direct current voltage reference value and the direct current voltage measurement value; compensating the first current data by adopting inertia compensation data to obtain current inner loop reference data; and generating a PWM signal through a current inner ring control and modulation link according to the current inner ring reference data and the second current data, and controlling the operation of the grid-connected power electronic converter by adopting the PWM signal so as to realize the inertia support of the grid-connected power electronic converter. The control method suitable for the inertia support of the grid-connected power electronic converter is used for processing the acquired frequency data and frequency reference data of the grid-connected point of the power electronic converter to obtain inertia compensation data, the inertia compensation data is used as compensation quantity of the power electronic converter to obtain current inner ring reference data, and the operation of the power electronic converter is controlled according to the current inner ring reference data and the second current data, so that the power electronic converter has the inertia support, a grid following type control strategy of the grid-connected converter does not need to be transformed into a grid forming type control strategy, and the method is simple and practical; the technical problems that the existing grid-connected power electronic converter of the new energy distributed power generation system needs to realize an inertia supporting function, needs to be modified, and is high in modification cost are solved.
Example two:
fig. 3 is a block diagram of a control device suitable for an inertia support of a grid-connected power electronic converter according to an embodiment of the present application.
As shown in fig. 3, an embodiment of the present application further provides a control device suitable for an inertia support of a grid-connected power electronic converter, which is applied to a new energy distributed power generation system, where the new energy distributed power generation system includes an ac port, a power electronic converter, and a dc port, the power electronic converter includes an ac converter, an intermediate capacitor, and a dc converter, which are connected in sequence, and the control device suitable for an inertia support of a grid-connected power electronic converter includes a data acquisition module 10, a data processing module 20, a data compensation module 30, and a control module 40;
the data acquisition module 10 is configured to acquire frequency data, reactive power measurement data, frequency reference data, and reactive power reference data of a grid-connected point of the power electronic converter, and acquire a dc voltage reference value and a dc voltage measurement value of the intermediate capacitor;
a data processing module 20, configured to determine inertia compensation data according to the frequency data and the frequency reference data; obtaining first current data and second current data by adopting voltage and current double-loop control according to the reactive power reference data, the reactive power measurement data, the direct current voltage reference value and the direct current voltage measurement value;
the data compensation module 30 is configured to compensate the first current data by using the inertia compensation data to obtain current inner loop reference data;
and the control module 40 is used for generating a PWM signal through a current inner ring control and modulation link according to the current inner ring reference data and the second current data, and controlling the operation of the grid-connected power electronic converter by adopting the PWM signal so as to realize the inertia support of the grid-connected power electronic converter.
In the embodiment of the present application, the data processing module 20 is further configured to calculate according to the frequency data and the frequency reference data to obtain a frequency parameter; and performing gain link and integral link processing on the frequency parameters to obtain inertia compensation data.
In this embodiment, the data processing module 20 is further configured to perform difference calculation on the frequency data and the frequency reference data to obtain a frequency parameter.
In this embodiment, the data compensation module 30 is further configured to add the inertia compensation data and the first current data to obtain current inner loop reference data.
It should be noted that, the modules in the second embodiment of the present invention correspond to the steps in the first embodiment of the present invention, and the contents of the control method suitable for supporting the inertia of the grid-connected power electronic converter are already described in detail in the first embodiment, and the contents of the modules in the second embodiment of the present invention are not described in detail in this second embodiment.
Example three:
the embodiment of the application provides a storage device, wherein a plurality of program codes are stored, and the program codes are suitable for being loaded and executed by a processor to execute the control method suitable for the inertia support of the grid-connected power electronic converter.
Example four:
the embodiment of the application provides terminal equipment, which comprises a processor and a memory;
a memory for storing the program code and transmitting the program code to the processor;
and the processor is used for executing the control method suitable for the inertia support of the grid-connected power electronic converter according to the instructions in the program codes.
It should be noted that the processor is configured to execute the steps in the above embodiment of the control method for the inertia support of the grid-connected power electronic converter according to the instructions in the program code. Alternatively, the processor, when executing the computer program, implements the functions of each module/unit in each system/apparatus embodiment described above.
Illustratively, a computer program may be partitioned into one or more modules/units, which are stored in a memory and executed by a processor to accomplish the present application. One or more modules/units may be a series of computer program instruction segments capable of performing specific functions, which are used to describe the execution of a computer program in a terminal device.
The terminal device may be a desktop computer, a notebook, a palm computer, a cloud server, or other computing devices. The terminal device may include, but is not limited to, a processor, a memory. Those skilled in the art will appreciate that the terminal device is not limited and may include more or fewer components than those shown, or some components may be combined, or different components, e.g., the terminal device may also include input output devices, network access devices, buses, etc.
The Processor may be a Central Processing Unit (CPU), other general purpose Processor, a Digital Signal Processor (DSP), an Application Specific Integrated Circuit (ASIC), an off-the-shelf Programmable Gate Array (FPGA) or other Programmable logic device, discrete Gate or transistor logic, discrete hardware components, etc. A general purpose processor may be a microprocessor or the processor may be any conventional processor or the like.
The storage may be an internal storage unit of the terminal device, such as a hard disk or a memory of the terminal device. The memory may also be an external storage device of the terminal device, such as a plug-in hard disk, a Smart Media Card (SMC), a Secure Digital (SD) Card, a Flash memory Card (Flash Card), and the like provided on the terminal device. Further, the memory may also include both an internal storage unit of the terminal device and an external storage device. The memory is used for storing computer programs and other programs and data required by the terminal device. The memory may also be used to temporarily store data that has been output or is to be output.
It is clear to those skilled in the art that, for convenience and brevity of description, the specific working processes of the above-described systems, apparatuses and units may refer to the corresponding processes in the foregoing method embodiments, and are not described herein again.
In the several embodiments provided in the present application, it should be understood that the disclosed system, apparatus and method may be implemented in other manners. For example, the above-described apparatus embodiments are merely illustrative, and for example, the division of the units is only one type of logical functional division, and other divisions may be realized in practice, for example, multiple units or components may be combined or integrated into another system, or some features may be omitted, or not executed. In addition, the shown or discussed mutual coupling or direct coupling or communication connection may be an indirect coupling or communication connection through some interfaces, devices or units, and may be in an electrical, mechanical or other form.
The units described as separate parts may or may not be physically separate, and parts displayed as units may or may not be physical units, may be located in one position, or may be distributed on multiple network units. Some or all of the units can be selected according to actual needs to achieve the purpose of the solution of the embodiment.
In addition, functional units in the embodiments of the present application may be integrated into one processing unit, or each unit may exist alone physically, or two or more units are integrated into one unit. The integrated unit can be realized in a form of hardware, and can also be realized in a form of a software functional unit.
The integrated unit, if implemented in the form of a software functional unit and sold or used as a stand-alone product, may be stored in a computer readable storage medium. Based on such understanding, the technical solution of the present application may be substantially implemented or contributed to by the prior art, or all or part of the technical solution may be embodied in a software product, which is stored in a storage medium and includes instructions for causing a computer device (which may be a personal computer, a server, or a network device) to execute all or part of the steps of the method according to the embodiments of the present application. And the aforementioned storage medium includes: a U-disk, a removable hard disk, a Read-Only Memory (ROM), a Random Access Memory (RAM), a magnetic disk or an optical disk, and other various media capable of storing program codes.
The above embodiments are only used for illustrating the technical solutions of the present application, and not for limiting the same; although the present application has been described in detail with reference to the foregoing embodiments, it should be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; and such modifications or substitutions do not depart from the spirit and scope of the corresponding technical solutions in the embodiments of the present application.
Claims (10)
1. A control method suitable for inertia support of a grid-connected power electronic converter is applied to a new energy distributed power generation system, the new energy distributed power generation system comprises an alternating current port, a power electronic converter and a direct current port which are sequentially connected, the power electronic converter comprises an alternating current converter, an intermediate capacitor and a direct current converter which are sequentially connected, and the control method suitable for inertia support of the grid-connected power electronic converter is characterized by comprising the following steps of:
acquiring frequency data, reactive power measurement data, frequency reference data and reactive power reference data of a grid-connected point of the power electronic converter, and acquiring a direct-current voltage reference value and a direct-current voltage measured value of an intermediate capacitor;
determining inertia compensation data according to the frequency data and the frequency reference data; obtaining first current data and second current data by adopting voltage and current double-loop control according to the reactive power reference data, the reactive power measurement data, the direct current voltage reference value and the direct current voltage measurement value;
compensating the first current data by adopting the inertia compensation data to obtain current inner ring reference data;
and generating a PWM signal through a current inner loop control and modulation link according to the current inner loop reference data and the second current data, and controlling the operation of the grid-connected power electronic converter by adopting the PWM signal so as to realize the inertia support of the grid-connected power electronic converter.
2. The control method suitable for the grid-connected power electronic converter inertia support according to claim 1, wherein determining inertia compensation data from the frequency data and the frequency reference data comprises: calculating according to the frequency data and the frequency reference data to obtain a frequency parameter; and performing gain link and integral link processing on the frequency parameters to obtain inertia compensation data.
3. The control method suitable for the grid-connected power electronic converter inertia support according to claim 2, wherein calculating the frequency parameter from the frequency data and the frequency reference data comprises: and calculating the difference between the frequency data and the frequency reference data to obtain a frequency parameter.
4. The control method suitable for the inertia support of the grid-connected power electronic converter according to claim 1, wherein the compensating the first current data by using the inertia compensation data to obtain the current inner loop reference data comprises: and adding the inertia compensation data and the first current data to obtain current inner loop reference data.
5. A control device suitable for inertia support of a grid-connected power electronic converter is applied to a new energy distributed power generation system, the new energy distributed power generation system comprises an alternating current port, a power electronic converter and a direct current port which are sequentially connected, and the power electronic converter comprises an alternating current converter, an intermediate capacitor and a direct current converter which are sequentially connected;
the data acquisition module is used for acquiring frequency data, reactive power measurement data, frequency reference data and reactive power reference data of a grid-connected point of the power electronic converter, and acquiring a direct-current voltage reference value and a direct-current voltage measurement value of the intermediate capacitor;
the data processing module is used for determining inertia compensation data according to the frequency data and the frequency reference data; obtaining first current data and second current data by adopting voltage and current double-loop control according to the reactive power reference data, the reactive power measurement data, the direct current voltage reference value and the direct current voltage measurement value;
the data compensation module is used for compensating the first current data by adopting the inertia compensation data to obtain current inner ring reference data;
and the control module is used for generating PWM signals through a current inner ring control and modulation link according to the current inner ring reference data and the second current data, and controlling the operation of the grid-connected power electronic converter by adopting the PWM signals so as to realize the inertia support of the grid-connected power electronic converter.
6. The control device suitable for the inertia support of the grid-connected power electronic converter according to claim 5, wherein the data processing module is further configured to calculate according to the frequency data and the frequency reference data to obtain a frequency parameter; and performing gain link and integral link processing on the frequency parameters to obtain inertia compensation data.
7. The control device suitable for the inertia support of the grid-connected power electronic converter according to claim 6, wherein the data processing module is further configured to perform difference calculation on the frequency data and the frequency reference data to obtain a frequency parameter.
8. The control device suitable for the grid-connected power electronic converter inertia support according to claim 5, wherein the data compensation module is further configured to add the inertia compensation data and the first current data to obtain current inner loop reference data.
9. A storage device having a plurality of program codes stored therein, wherein the program codes are adapted to be loaded and executed by a processor to perform a control method adapted for use in a grid-connected power electronic converter inertia support according to any of claims 1 to 4.
10. A terminal device comprising a processor and a memory;
the memory is used for storing program codes and transmitting the program codes to the processor;
the processor is configured to execute the control method for the inertia support of the grid-connected power electronic converter according to any one of claims 1 to 4 according to instructions in the program code.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211502127.4A CN115833256A (en) | 2022-11-28 | 2022-11-28 | Control method and device suitable for inertia support of grid-connected power electronic converter |
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| CN116388253A (en) * | 2023-06-07 | 2023-07-04 | 南方电网科学研究院有限责任公司 | Bidirectional charging module control method and system based on inertia support |
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| CN116388253A (en) * | 2023-06-07 | 2023-07-04 | 南方电网科学研究院有限责任公司 | Bidirectional charging module control method and system based on inertia support |
| CN116388253B (en) * | 2023-06-07 | 2023-08-18 | 南方电网科学研究院有限责任公司 | Bidirectional charging module control method and system based on inertia support |
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