Converter grid-connected control method and device, storage medium and electronic equipment

Abstract

The application relates to the technical field of power electronics, in particular to a converter grid-connected control method and device, a storage medium and an electronic device, and solves the problem that the converter cannot simultaneously meet the requirements of active power and reactive power output in related technologies. The method comprises the following steps: collecting a first voltage parameter and a first current parameter of a power grid side and a second voltage parameter and a second current parameter of a converter; obtaining a first reactive power according to the first voltage parameter and the first current parameter; obtaining a first active power according to the second voltage parameter and the second current parameter; obtaining a reactive power amplitude upper limit value of the converter according to the first active power and a rated capacity of the converter; obtaining a second reactive power according to the first reactive power; judging whether the reactive power amplitude upper limit value is greater than the second reactive power; if yes, sending a first control instruction to make the converter grid-connected according to the first control instruction; and if no, sending a second control instruction to make the converter grid-connected according to the second control instruction.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of power electronics, in particular to a grid-connected control method and device of a converter, a storage medium and an electronic device. BACKGROUND

[0002] With the development of power electronics technology, grid-connected converters are widely used in various occasions. In addition to normal active output, the converter can have reactive power compensation function, which improves the operation efficiency of the converter. However, in the related art, when using the converter, there are two modes of active power control and reactive power control, and only one of them can be selected when running, which cannot simultaneously meet the active and reactive output requirements, and in terms of power quality optimization, only the improvement of power factor is considered, without considering the demand for voltage amplitude compensation.

[0003] In the related art, when using the converter, the demand for simultaneous consideration of active power and reactive power output cannot be met, and the utilization efficiency of the converter is low. SUMMARY

[0004] To solve the above problems, the present application provides a grid-connected control method and device of a converter, a storage medium and an electronic device, which solves the technical problem that the related art cannot simultaneously meet the demand for active power and reactive power output when using the converter, and the utilization efficiency of the converter is low.

[0005] In a first aspect, the present application provides a grid-connected control method of a converter, the method comprising:

[0006] collecting a first voltage parameter and a first current parameter of a power grid side and a second voltage parameter and a second current parameter of the converter;

[0007] obtaining a first reactive power according to the first voltage parameter and the first current parameter;

[0008] obtaining a first active power according to the second voltage parameter and the second current parameter;

[0009] obtaining a reactive power amplitude upper limit value of the converter according to the first active power and a rated capacity of the converter;

[0010] obtaining a second reactive power according to the first reactive power;

[0011] determining whether the reactive power amplitude upper limit value is greater than the second reactive power;

[0012] when the reactive power amplitude upper limit value is greater than the second reactive power, sending a first control instruction to make the converter grid-connected according to the first control instruction;

[0013] When the reactive power amplitude upper limit value is less than the second reactive power, a second control instruction is sent, so that the converter performs grid connection according to the second control instruction.

[0014] According to the embodiment of the present application, optionally, in the converter grid connection control method, the first reactive power is obtained according to the first voltage parameter and the first current parameter, comprising:

[0015] The first voltage parameter is vector transformed to obtain a voltage active component and a voltage reactive component;

[0016] The first current parameter is vector transformed to obtain a current active component and a current reactive component;

[0017] The first reactive power is obtained according to the voltage active component, the voltage reactive component, the current active component, the current reactive component and the following calculation formula:

[0018] The calculation formula comprises: Q=U d1 ×I q1 -U q1 ×I d1 ,

[0019] Wherein, Q represents reactive power, U d1 represents voltage active component, I d1 represents current active component, U q1 represents voltage reactive component, I q1 represents current reactive component.

[0020] According to the embodiment of the present application, optionally, in the converter grid connection control method, the first active power is obtained according to the second voltage parameter and the second current parameter, comprising:

[0021] The second voltage parameter is vector transformed to obtain a voltage active component and a voltage reactive component;

[0022] The second current parameter is vector transformed to obtain a current active component and a current reactive component;

[0023] The first active power is obtained according to the voltage active component, the voltage reactive component, the current active component, the current reactive component and the following calculation formula:

[0024] The calculation formula comprises: P=U d2 ×I d2 +U q2 ×I q2 ,

[0025] Wherein, P represents active power, U d2 represents voltage active component, I d2 represents current active component, Uq2 represents the voltage reactive component, I q2 represents the current reactive component.

[0026] According to the embodiment of the present application, optionally, in the grid-connected control method of the converter, the reactive power upper limit value of the converter is obtained according to the first active power and the rated capacity of the converter, comprising:

[0027] The reactive power upper limit value of the converter is obtained according to the first active power, the rated capacity of the converter and the following calculation formula:

[0028] The calculation formula comprises:

[0029] Wherein, Q lim represents the reactive power upper limit value, S represents the rated capacity of the converter, and P1 represents the first active power.

[0030] According to the embodiment of the present application, optionally, in the grid-connected control method of the converter, the second reactive power is obtained according to the first reactive power, comprising:

[0031] The second reactive power is obtained according to the first reactive power and the following calculation formula:

[0032] The calculation formula comprises: Q2=Q1 / N,

[0033] Wherein, Q2 represents the second reactive power, Q1 represents the first reactive power, and N represents the number of converters.

[0034] According to the embodiment of the present application, optionally, in the grid-connected control method of the converter, further comprising: taking the negative of the second reactive power according to the first control instruction, obtaining a third current according to the second reactive power after taking the negative, and outputting.

[0035] According to the embodiment of the present application, optionally, in the grid-connected control method of the converter, further comprising: taking the negative of the reactive power upper limit value according to the second control instruction, obtaining a fourth current according to the reactive power upper limit value after taking the negative, and outputting.

[0036] In a second aspect, the present application provides a grid-connected control device of a converter, comprising:

[0037] The acquisition module is configured to acquire a first voltage parameter and a first current parameter of a power grid side, and a second voltage parameter and a second current parameter of a converter.

[0038] The first execution module is configured to obtain a first reactive power according to the first voltage parameter and the first current parameter.

[0039] a second execution module configured to obtain a first active power according to the second voltage parameter and the second current parameter;

[0040] a third execution module configured to obtain a reactive power limit upper limit value of the converter according to the first active power and a rated capacity of the converter;

[0041] a fourth execution module configured to obtain a second reactive power according to the first reactive power;

[0042] a judgment module configured to judge whether the reactive power limit upper limit value is greater than the second reactive power;

[0043] a first control module configured to send a first control instruction when the reactive power limit upper limit value is greater than the second reactive power;

[0044] a second control module configured to send a second control instruction when the reactive power limit upper limit value is less than the second reactive power.

[0045] In a third aspect, the present application provides a storage medium, which stores a computer program executable by one or more processors and used to implement the converter grid-connected control method.

[0046] In a fourth aspect, the present application provides an electronic device, which comprises a memory and a processor, the memory stores a computer program, and the memory and the processor are communicatively connected, the computer program is executed by the processor to implement the converter grid-connected control method.

[0047] The converter grid-connected control method, device, storage medium and electronic device provided by the present application have the following beneficial effects:

[0048] 1. The active power output and the reactive power output can be considered at the same time;

[0049] 2. The utilization efficiency of the converter and the response time when the converter is grid-connected are improved;

[0050] 3. The sampling rate of the related data and the accuracy of the calculation result are improved. BRIEF DESCRIPTION OF DRAWINGS

[0051] The present application will be described in more detail below based on the embodiments and with reference to the drawings:

[0052] Figure 1 A flowchart of a converter grid-connected control method provided by the embodiments of the present application is shown in the figure;

[0053] Figure 2 Another flowchart of a converter grid-connected control method provided by the embodiments of the present application is shown in the figure;

[0054] Figure 3 A connection block diagram of a grid-connected control device of a converter is provided for an embodiment of the present application.

[0055] In the drawings, the same components are designated by the same reference numerals, and the drawings are not drawn to scale. DETAILED DESCRIPTION

[0056] The embodiments of the present application will be described in detail below with reference to the drawings and embodiments, so that how the present application applies technical means to solve technical problems and achieves corresponding technical effects can be fully understood and implemented. The embodiments of the present application and various features in the embodiments can be combined with each other without conflict, and the formed technical solutions are all within the protection scope of the present application.

[0057] The present disclosure provides a converter grid-connected control method and device, a storage medium and an electronic device, which solve the technical problems that the active power and reactive power output cannot be simultaneously considered in related art when using a converter, and the utilization efficiency of the converter is low.

[0058] Example One

[0059] Figure 1 A flowchart of a converter grid-connected control method provided for an embodiment of the present application is shown in FIG. 1, and the method comprises the following steps. Figure 1

[0060] Step S110: collecting a first voltage parameter and a first current parameter of a power grid side and a second voltage parameter and a second current parameter of a converter;

[0061] Step S120: obtaining a first reactive power according to the first voltage parameter and the first current parameter;

[0062] Step S130: obtaining a first active power according to the second voltage parameter and the second current parameter;

[0063] Step S140: obtaining a reactive power limiting upper limit value of the converter according to the first active power and a rated capacity of the converter;

[0064] Step S150: obtaining a second reactive power according to the first reactive power;

[0065] Step S160: determining whether the reactive power limiting upper limit value is greater than the second reactive power;

[0066] Step S170: when the reactive power limiting upper limit value is greater than the second reactive power, sending a first control instruction to make the converter grid-connected according to the first control instruction.​

[0067] Step S180: when the reactive power amplitude upper limit value is less than the second reactive power, sending a second control instruction to make the converter grid-connected according to the second control instruction.

[0068] wherein, the first voltage parameter and the second voltage parameter can be same.

[0069] Further, the first reactive power is obtained according to the first voltage parameter and the first current parameter, comprising:

[0070] vector transforming the first voltage parameter to obtain a voltage active component and a voltage reactive component;

[0071] vector transforming the first current parameter to obtain a current active component and a current reactive component;

[0072] the first reactive power is obtained according to the voltage active component, the voltage reactive component, the current active component, the current reactive component and the following calculation formula:

[0073]

[0074] wherein, Q represents reactive power, U d1 represents voltage active component, I d1 represents current active component, U q1 represents voltage reactive component, I q1 represents current reactive component.

[0075] Further, the first active power is obtained according to the second voltage parameter and the second current parameter, comprising:

[0076] vector transforming the second voltage parameter to obtain a voltage active component and a voltage reactive component;

[0077] vector transforming the second current parameter to obtain a current active component and a current reactive component;

[0078] the first active power is obtained according to the voltage active component, the voltage reactive component, the current active component, the current reactive component and the following calculation formula:

[0079] the calculation formula comprises: P = U d2 × I d2 + U q2 × I q2 (2)

[0080] wherein, P represents active power, U d2 represents voltage active component, I d2 represents current active component, U q2 represents voltage reactive component, Iq2 This represents the reactive component of the current.

[0081] Specifically, the active and reactive voltage components obtained from the voltage parameter vector transformation include:

[0082]

[0083]

[0084] Among them, u a u b u c For three-phase voltage parameters, u α u β The three-phase voltage is equivalent to the AC voltage in a two-phase stationary coordinate system through a three-phase one-to-two-term transformation, u q U represents the reactive component of voltage. d The active component of voltage is represented by θ, which ranges from 0 to 2π.

[0085] Specifically, the active and reactive components of the current obtained by vector transformation of the current parameters include:

[0086]

[0087] Among them, I a I b I c For three-phase current parameters, I α I β For a three-phase current to be equivalently converted into a two-phase AC current in a stationary coordinate system through a three-phase one-to-two-term transformation, I q I represents the reactive component of current. d The value of θ represents the active component of the current, and the range of θ is 0 to 2π.

[0088] Furthermore, obtaining the upper limit value of the reactive power limit of the converter based on the first active power and the rated capacity of the converter includes:

[0089] The upper limit value of the reactive power limit of the converter is obtained based on the first active power, the rated capacity of the converter, and the following calculation formula;

[0090] The calculation formula includes:

[0091] Among them, Q lim This indicates the upper limit of reactive power, S represents the rated capacity of the converter, and P1 represents the first active power.

[0092] Furthermore, obtaining the second reactive power based on the first reactive power includes:

[0093] According to the first reactive power and the following calculation formula, a second reactive power is obtained;

[0094] The calculation formula includes: Q2=Q1 / N (8)

[0095] Wherein, Q2 represents the second reactive power, Q1 represents the first reactive power, and N represents the number of the converter.

[0096] For example, the energy storage converter collects the three-phase grid voltage parameters U a , U b , U c , three-phase grid current parameters I agrid , I bgrid , I cgrid , and three-phase output current parameters I apcs , I bpcs , I cpcs of the energy storage converter, wherein the voltage of the energy storage converter is the same as the three-phase grid voltage parameters of the grid side.

[0097] According to the three-phase grid voltage parameters U a , U b , U c , three-phase grid current parameters I agrid , I bgrid , I cgrid and the calculation formula (1), the reactive power Q grid of the grid side is obtained.

[0098] According to the three-phase grid voltage parameters U a , U b , U c , three-phase output current parameters I apcs , I bpcs , I cpcs and the calculation formula (2), the active power P pcs of the energy storage converter is obtained.

[0099] According to the active power P pcs of the energy storage converter, the rated capacity S N of the energy storage converter and the calculation formula (7), the upper limit value Q lim of the reactive power limit of the energy storage converter is obtained.

[0100] According to the reactive power Q grid , the number N of the energy storage converter and the calculation formula (8), the reactive power Q N of each energy storage converter is obtained.

[0101] If the upper limit value Q lim of the reactive power limit is greater than the reactive power Q N , a first control instruction is sent.

[0102] If the reactive power limit upper limit value Q lim Less than the reactive power Q N Then send the second control instruction;

[0103] If the reactive power limit upper limit value Q lin Equal to the reactive power Q B Then send the first control instruction or the second control instruction.

[0104] Wherein, the first control instruction includes taking the negative of the second reactive power, and the second control instruction includes taking the negative of the reactive power limit upper limit value.

[0105] Further, it also includes: according to the first control instruction, taking the negative of the second reactive power, obtaining the third current according to the second reactive power after taking the negative, and outputting.

[0106] Specifically, according to the first control instruction, taking the negative value -Q N According to calculation formula (1), calculation formula (5), calculation formula (6), the corresponding three-phase current is obtained and outputted.

[0107] Further, it also includes: according to the second control instruction, taking the negative of the reactive power limit upper limit value, obtaining the fourth current according to the reactive power limit upper limit value after taking the negative, and outputting.

[0108] Specifically, according to the second control instruction, taking the negative value -Q lim According to calculation formula (1), calculation formula (5), calculation formula (6), the corresponding three-phase current is obtained and outputted.

[0109] For example, Figure 2 Another flow chart of a converter grid-connected control method provided by the embodiment of the application is shown in Figure 2 The energy storage converter control system includes a signal acquisition and processing module and a device controller. The signal acquisition and processing module acquires three-phase grid voltage, three-phase grid current and three-phase output current, and calculates active power and reactive power according to the three-phase grid voltage, three-phase grid current and three-phase output current; the device controller sends a control instruction according to the first active power and the first reactive power, and the device function module outputs a current according to the control instruction, so as to realize the grid connection of the energy storage converter.

[0110] The converter grid-connected control method disclosed by the embodiment comprises: collecting a first voltage parameter, a first current parameter of a power grid side and a second voltage parameter, a second current parameter of a converter; obtaining a first reactive power according to the first voltage parameter and the first current parameter; obtaining a first active power according to the second voltage parameter and the second current parameter; obtaining a reactive power limit upper limit value of the converter according to the first active power and a rated capacity of the converter; obtaining a second reactive power according to the first reactive power; judging whether the reactive power limit upper limit value is greater than the second reactive power; when the reactive power limit upper limit value is greater than the second reactive power, sending a first control instruction; when the reactive power limit upper limit value is less than the second reactive power, sending a second control instruction. The output of the active power is considered on the basis of the output of the reactive power, and the demand of the active power and the reactive power output is considered at the same time. When the power quality is optimized, the demand of voltage amplitude compensation is considered, and the utilization efficiency of the converter and the response time of the converter grid-connected are improved.

[0111] Embodiment two

[0112] Figure 3 A connection block diagram of a converter grid-connected control device 200 provided by the embodiment is shown in the figure, the device 200 comprises: Figure 3

[0113] The collecting module 201 is used for collecting a first voltage parameter, a first current parameter of a power grid side and a second voltage parameter, a second current parameter of a converter;

[0114] The first executing module 202 is used for obtaining a first reactive power according to the first voltage parameter and the first current parameter;

[0115] The second executing module 203 is used for obtaining a first active power according to the second voltage parameter and the second current parameter;

[0116] The third executing module 204 is used for obtaining a reactive power limit upper limit value of the converter according to the first active power and a rated capacity of the converter;

[0117] The fourth executing module 205 is used for obtaining a second reactive power according to the first reactive power;

[0118] The judging module 206 is used for judging whether the reactive power limit upper limit value is greater than the second reactive power;

[0119] The first control module 207 is used for sending a first control instruction when the reactive power limit upper limit value is greater than the second reactive power, so that the converter performs grid-connected according to the first control instruction;

[0120] ​The second control module 208 is configured to send a second control instruction to make the converter grid-connected according to the first control instruction when the reactive power limit upper limit value is less than the second reactive power.

[0121] The specific embodiment process of the method steps can refer to Embodiment 1, which will not be repeated here.

[0122] Embodiment 3

[0123] The embodiment also provides a computer readable storage medium, such as a flash memory, a hard disk, a multimedia card, a card memory (for example, an SD or DX memory), a random access memory (RAM), a static random access memory (SRAM), a read-only memory (ROM), an electrically erasable programmable read-only memory (EEPROM), a programmable read-only memory (PROM), a magnetic memory, a magnetic disk, an optical disk, a server, an App application store, and the like, which stores a computer program. The computer program can implement the method steps of Embodiment 1 when executed by a processor. The embodiment will not be repeated here.

[0124] Embodiment 4

[0125] The present application provides an electronic device, comprising a memory and a processor, the memory stores a computer program, the memory and the processor are connected with each other, and the computer program is executed by the processor to perform the converter grid-connected control method in Embodiment 1.

[0126] The processor can be an application specific integrated circuit (ASIC), a digital signal processor (DSP), a digital signal processing device (DSPD), an ARM processing chip, a programmable logic device (PLD), a field programmable gate array (FPGA), a controller, a microcontroller, a microprocessor, or other electronic elements, which is used to execute the converter grid-connected control method in Embodiment 1.

[0127] The memory can be implemented by any type of volatile or nonvolatile storage devices or a combination thereof, such as static random access memory (SRAM), electrically erasable programmable read-only memory (EEPROM), erasable programmable read-only memory (EPROM), programmable read-only memory (PROM), FLASH memory chip, ferroelectric memory chip (FRAM), read-only memory (ROM), magnetic storage, flash memory, magnetic disk or optical disk.

[0128] To sum up, the application provides a converter grid-connected control method and device, a storage medium and an electronic device. The method comprises the following steps: collecting a first voltage parameter and a first current parameter of a power grid side and a second voltage parameter and a second current parameter of a converter; obtaining a first reactive power according to the first voltage parameter and the first current parameter; obtaining a first active power according to the second voltage parameter and the second current parameter; obtaining a reactive power limiting upper limit value of the converter according to the first active power and a rated capacity of the converter; obtaining a second reactive power according to the first reactive power; judging whether the reactive power limiting upper limit value is greater than the second reactive power; sending a first control instruction when the reactive power limiting upper limit value is greater than the second reactive power; and sending a second control instruction when the reactive power limiting upper limit value is less than the second reactive power.

[0129] The output of the reactive power is considered on the basis of the output of the active power, and the demand of the output of the active power and the reactive power is considered at the same time. When the power quality is optimized, the demand of voltage amplitude compensation is considered, the utilization efficiency of the converter is improved, and the response time of the converter when connected to the grid is improved. The technical problem that the demand of the output of the active power and the reactive power cannot be considered at the same time when the converter is used in the related art, and the utilization efficiency of the converter is low, is solved. The sampling and calculation of the related data by the converter reduces the deviation of the calculation result, improves the sampling rate, and improves the accuracy of the calculation result.

[0130] In the several embodiments provided in the application, it should be understood that the disclosed method can also be implemented by other means. The method embodiments described above are only illustrative.

[0131] It should be noted that, in the present document, the terms "comprises", "comprising", or any other variations thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but can also include other elements not expressly listed or inherent to such process, method, article, or apparatus. An element proceeded by "comprises a", "comprising", or "comprises" does not, without further restriction, exclude the existence of additional elements of the process, method, article, or apparatus that comprises the element.

[0132] Although the present application has been disclosed with reference to the above embodiments, the content mentioned above is only for the purpose of facilitating the understanding of the present application, and is not intended to limit the present application. Any person skilled in the art without departing from the spirit and scope of the present application can make any modification and change in the form and details of the implementation, but the patent protection scope of the present application shall be subject to the scope defined by the appended claims.

Claims

1. A grid-connected control method of a converter, characterized by, The method comprises: collecting a first voltage parameter and a first current parameter of a power grid side and a second voltage parameter and a second current parameter of a converter; obtaining a first reactive power according to the first voltage parameter and the first current parameter; obtaining a first active power according to the second voltage parameter and the second current parameter; obtaining a reactive power limit upper limit value of the converter according to the first active power and a rated capacity of the converter; obtaining a second reactive power according to the first reactive power and the following calculation formula: the calculation formula is Q2=Q1 / N, wherein Q2 represents the second reactive power, Q1 represents the first reactive power, and N represents the number of converters; wherein the second reactive power is the reactive power of each converter; judging whether the reactive power limit upper limit value is greater than the second reactive power; when the reactive power limit upper limit value is greater than the second reactive power, sending a first control instruction to make the converter grid-connected according to the first control instruction; when the reactive power limit upper limit value is less than the second reactive power, sending a second control instruction to make the converter grid-connected according to the second control instruction.

2. The method of claim 1, wherein, The method comprises: vector transforming the first voltage parameter to obtain a voltage active component and a voltage reactive component; vector transforming the first current parameter to obtain a current active component and a current reactive component; obtaining the first reactive power according to the voltage active component, the voltage reactive component, the current active component, the current reactive component and the following calculation formula; The calculation formula includes: Q = U d1 x I q1 - U q1 x I d1 , where Q represents the reactive power, U d1 represents the voltage active component, I d1 represents the current active component, U q1 represents the voltage reactive component, I q1 represents the current reactive component.

3. The method according to claim 1 or 2, characterized in that, The method comprises: vector transforming the second voltage parameter to obtain a voltage active component and a voltage reactive component; vector transforming the second current parameter to obtain a current active component and a current reactive component; obtaining the first active power according to the voltage active component, the voltage reactive component, the current active component, the current reactive component and the following calculation formula; The calculation formula includes: P = U d2 x I d2 + U q2 x I q2 , where P denotes the active power, U d2 denotes the voltage active component, I d2 denotes the current active component, U q2 denotes the voltage reactive component, I q2 denotes the current reactive component.

4. The method of claim 1, wherein, The method comprises: obtaining the reactive power limit upper limit value of the converter according to the first active power, the rated capacity of the converter and the following calculation formula; The calculation formula includes: where Q lim represents a reactive power limit upper limit value, S represents a rated capacity of the converter, and P1 represents the first active power.

5. The method of claim 1, wherein, The method further comprises: according to the first control instruction, taking the second reactive power as negative, obtaining a third current according to the second reactive power after taking negative, and outputting to realize grid-connection of the converter.

6. The method of claim 1, wherein, The method further comprises: according to the second control instruction, taking the reactive power limit upper limit value as negative, obtaining a fourth current according to the reactive power limit upper limit value after taking negative, and outputting to realize grid-connection of the converter.

7. A grid-connected control device for a power converter, characterized in that The device comprises: a collection module configured to collect a first voltage parameter and a first current parameter of a power grid side and a second voltage parameter and a second current parameter of a converter; a first execution module configured to obtain a first reactive power according to the first voltage parameter and the first current parameter; a second execution module, configured to obtain a first active power according to the second voltage parameter and the second current parameter; a third execution module, configured to obtain a reactive power limit upper limit value of the converter according to the first active power and a rated capacity of the converter; a fourth execution module, configured to obtain a second reactive power according to the first reactive power and a calculation formula Q2=Q1 / N, wherein Q2 represents the second reactive power, Q1 represents the first reactive power, and N represents the number of converters; the second reactive power is the reactive power of each converter; a judgment module, configured to judge whether the reactive power limit upper limit value is greater than the second reactive power; a first control module, configured to send a first control instruction to make the converter grid-connected according to the first control instruction when the reactive power limit upper limit value is greater than the second reactive power; a second control module, configured to send a second control instruction to make the converter grid-connected according to the second control instruction when the reactive power limit upper limit value is less than the second reactive power.

8. A storage medium, characterized by The computer program stored in the storage medium can be executed by one or more processors, and can be used to implement the converter grid-connected control method in any one of claims 1-6.

9. An electronic device, comprising: The computer program stored in the storage medium can be executed by one or more processors, and can be used to implement the converter grid-connected control method in any one of claims 1-6.

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