Power control method of energy storage converter, electronic device and storage medium

Abstract

The present invention discloses a power control method, electronic device and storage medium of an energy storage converter, wherein the power control method of the energy storage converter comprises: controlling and adjusting the grid-side active power and grid-side reactive power of the energy storage converter respectively through a preconfigured power outer loop to obtain the corresponding active power outer loop output current and reactive power outer loop output current; determining the current loop given current according to the active power outer loop output current and the reactive power outer loop output current; controlling and adjusting the current loop given current through a preconfigured current inner loop to obtain the drive signal of the energy storage converter. In the present invention, compared with the related prior art, there is no need to change the load phase connection relationship of the energy storage converter, the control is more convenient and the comprehensive cost is lower, and the problem of imbalance in the three-phase area of ​​the energy storage converter can be effectively solved, which is conducive to realizing fast and smooth charging and discharging mode switching of the energy storage converter.

Description

Technical Field

[0001] The present invention relates to the field of energy storage technology, and in particular to a power control method of an energy storage converter, an electronic device and a computer-readable storage medium. Background Art

[0002] At present, most energy storage converters have the problem of three-phase imbalance. The complex and changeable application scenarios, the expansion of grid-connected scale and other factors have aggravated this phenomenon. Based on this, the market changes the load phase connection relationship according to the instantaneous phase power or current, that is, the three-phase power is transferred between phases to reduce the three-phase imbalance. However, this method requires manual control of switching devices, which is more complicated and cumbersome to operate, and the overall cost is high. Summary of the invention

[0003] The present invention aims to solve at least one of the technical problems in the related art to a certain extent. To this end, the present invention proposes a power control method, electronic device and storage medium of an energy storage converter, which has a simple control method and low comprehensive cost, and can effectively solve the problem of unbalanced three-phase area of ​​the energy storage converter.

[0004] In a first aspect, an embodiment of the present invention provides a power control method for an energy storage converter, comprising:

[0005] The obtained grid-side active power and grid-side reactive power of the energy storage converter are controlled and adjusted respectively through a preconfigured power outer loop to obtain corresponding active power outer loop output current and reactive power outer loop output current;

[0006] Determining a current loop given current according to the active power outer loop output current and the reactive power outer loop output current;

[0007] The current loop given current is controlled and adjusted through a preconfigured current inner loop to obtain a driving signal for the energy storage converter.

[0008] Optionally, in one embodiment of the present invention, controlling and adjusting the acquired grid-side active power of the energy storage converter through a preconfigured power outer loop to obtain an active power outer loop output current includes:

[0009] For each single phase, inputting a first regulating component into a control unit of a preconfigured power outer loop, wherein the first regulating component is a difference between a given active power corresponding to the single phase and the grid-side active power;

[0010] After passing through the control unit of the power outer loop, the given active power corresponding to the single phase is used as the feedforward introduction amount of the power outer loop, thereby converting to obtain the active power outer loop output current.

[0011] Optionally, in one embodiment of the present invention, controlling and adjusting the acquired grid-side reactive power of the energy storage converter through a preconfigured power outer loop to obtain the reactive power outer loop output current includes:

[0012] For each single phase, inputting a second regulating component into a control unit of a preconfigured power outer loop, wherein the second regulating component is a difference between a given reactive power corresponding to the single phase and the grid-side reactive power;

[0013] After passing through the control unit of the power outer loop, the given reactive power corresponding to the single phase is used as the feedforward introduction amount of the power outer loop, thereby converting to obtain the reactive power outer loop output current.

[0014] Optionally, in one embodiment of the present invention, determining the current loop given current according to the active power outer loop output current and the reactive power outer loop output current comprises:

[0015] Substitute the active power outer loop output current and the reactive power outer loop output current into a given current calculation formula for calculation to obtain a current loop given current, wherein the given current calculation formula is as follows:

[0016]

[0017] in, for Phase current loop given current, for Phase active power outer loop output current, for Phase reactive power outer loop output current; for Phase current loop given current, for Phase active power outer loop output current, for Phase reactive power outer loop output current; for Phase current loop given current, for Phase active power outer loop output current, for Phase reactive power outer loop output current.

[0018] Optionally, in one embodiment of the present invention, the current loop given current includes Phase current loop given current, Phase current loop given current and The phase current loop given current, wherein the current loop given current is controlled and adjusted by a preconfigured current inner loop to obtain a driving signal of the energy storage converter, comprises:

[0019] Respectively Phase current loop given current, the The phase current loop given current and the The phase current loop gives the current and performs three-phase-two-phase coordinate transformation, and the corresponding grid side Axis given current, grid side Axis given current and grid side Axis given current;

[0020] The network side The shaft given current is input into the first regulating branch in the current inner loop and output to the grid side shaft drive voltage, and the grid side The shaft given current is input into the second regulating branch in the current inner loop and output to the grid side shaft drive voltage, and the grid side The shaft given current is input into the third regulating branch in the current inner loop and output to the grid side Shaft drive voltage;

[0021] On the network side Shaft drive voltage, the grid side The shaft drive voltage and the grid side The shaft driving voltage is subjected to SPWM modulation processing to obtain a driving signal of the energy storage converter.

[0022] Optionally, in one embodiment of the present invention, the network side The shaft given current is input into the first regulating branch in the current inner loop and output to the grid side Shaft drive voltage, including:

[0023] Get the network side The shaft current is determined by the grid side The difference between the shaft currents is used to obtain the third adjustment component;

[0024] The third regulating component is input into the control unit of the first regulating branch, and after passing through the control unit of the first regulating branch, the grid side The shaft voltage is used as the feedforward input of the first regulating branch, thereby outputting the grid side Shaft drive voltage.

[0025] In a second aspect, an embodiment of the present invention provides an electronic device, including:

[0026] at least one processor;

[0027] at least one memory for storing at least one program;

[0028] When at least one of the programs is executed by at least one of the processors, the power control method of the energy storage converter as described in the first aspect is implemented.

[0029] In a third aspect, an embodiment of the present invention provides a computer-readable storage medium storing a program executable by a processor, wherein the program executable by the processor is used to implement the power control method of the energy storage converter as described in the first aspect when executed by the processor.

[0030] The power control method, electronic device and storage medium of the energy storage converter proposed in the present invention respectively control and adjust the grid-side active power and grid-side reactive power of the energy storage converter through a preconfigured power outer loop to obtain the corresponding active power outer loop output current and reactive power outer loop output current, thereby realizing compensation of active power and reactive power. Furthermore, when the current loop given current is determined based on the active power outer loop output current and the reactive power outer loop output current, the current loop given current is controlled and adjusted through a preconfigured current inner loop, so that the drive signal of the energy storage converter for each power switch tube inside it can be obtained. It can be seen that compared with the relevant existing technology, there is no need to change the load phase connection relationship of the energy storage converter, but the power regulation of the energy storage converter is directly realized through the power outer loop and the current inner loop, which is more convenient to control and has lower overall cost, can effectively solve the problem of imbalance in the three-phase area of ​​the energy storage converter, and is conducive to realizing fast and smooth charging and discharging mode switching of the energy storage converter. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] Figure 1 is a flow chart of a power control method of an energy storage converter provided by an embodiment of the present invention;

[0032] Figure 2 is a circuit topology schematic diagram of an energy storage converter provided by an embodiment of the present invention;

[0033] Figure 3 is a schematic diagram of grid-side voltage phase locking provided by an embodiment of the present invention;

[0034] FIG4 (a) is a schematic diagram of analog conversion of grid-side voltage provided by an embodiment of the present invention;

[0035] FIG4( b ) is a schematic diagram of analog conversion of grid-side current provided by an embodiment of the present invention;

[0036] Figure 5 yes Figure 1A partial flow chart of the step S1000 in step “controlling and adjusting the acquired grid-side active power of the energy storage converter through the pre-configured power outer loop to obtain the active power outer loop output current”;

[0037] Figure 6 is a schematic diagram of control and regulation of a power outer loop provided by an embodiment of the present invention;

[0038] Figure 7 It is a partial flow chart of the step "controlling and adjusting the acquired grid-side reactive power of the energy storage converter through a preconfigured power outer loop to obtain the reactive power outer loop output current" in step S1000 provided in an embodiment of the present invention;

[0039] Figure 8 is a schematic diagram of control and regulation of a power outer loop provided by another embodiment of the present invention;

[0040] Fig. 9 yes Figure 1 Flowchart of step S3000 in FIG.

[0041] Fig.10 It is a schematic diagram of analog quantity conversion of a given current of a current loop provided by an embodiment of the present invention;

[0042] Fig.11 is a schematic diagram of control and regulation of a current inner loop provided by an embodiment of the present invention;

[0043] Fig.12 It is a schematic diagram of the structure of an electronic device provided by an embodiment of the present invention. DETAILED DESCRIPTION

[0044] In order to make the purpose, technical solution and advantages of the present invention more clearly understood, the present invention is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention.

[0045] It should be noted that although the functional modules are divided in the device schematic and the logical order is shown in the flowchart, in some cases, the steps shown or described may be performed in a different order than the module division in the device or the order in the flowchart.

[0046] Figure 1 This is a flow chart of a power control method for an energy storage converter provided by an embodiment of the present invention. Figure 1 As shown, the power control method of the energy storage converter may include but is not limited to steps S1000 to S3000.

[0047] Step S1000: Control and adjust the acquired grid-side active power and grid-side reactive power of the energy storage converter through the pre-configured power outer loop to obtain the corresponding active power outer loop output current and reactive power outer loop output current;

[0048] Step S2000, determining a current loop given current according to an active power outer loop output current and a reactive power outer loop output current;

[0049] Step S3000: Control and adjust the given current of the current loop through the preconfigured current inner loop to obtain a driving signal for the energy storage converter.

[0050] In this step, the grid-side active power and grid-side reactive power of the energy storage converter are controlled and adjusted respectively through the preconfigured power outer loop to obtain the corresponding active power outer loop output current and reactive power outer loop output current, thereby realizing the compensation of active power and reactive power. Then, when the current loop given current is determined based on the active power outer loop output current and the reactive power outer loop output current, the current loop given current is controlled and adjusted through the preconfigured current inner loop, so as to obtain the driving signal of the energy storage converter for each power switch tube inside it. It can be seen that, compared with the relevant existing technology, there is no need to change the load phase connection relationship of the energy storage converter, but the power regulation of the energy storage converter is directly realized through the power outer loop and the current inner loop, which is more convenient to control and has lower overall cost, can effectively solve the problem of imbalance in the three-phase area of ​​the energy storage converter, and is conducive to realizing fast and smooth charging and discharging mode switching of the energy storage converter.

[0051] It should be noted that there may be many types of energy storage converters applicable to this embodiment, and those skilled in the art may make corresponding selections based on actual application scenarios, and there is no restriction here. For example, it may be but is not limited to adopting a common DCAC topology based on an LCL filter, and this part of the topology may include but is not limited to a DC input part, a power part, and an AC filtering part, etc. In order to better illustrate the working principles of the above embodiments, a specific implementation of an energy storage converter is given below as an example for illustration, but it should not be understood as any restriction or limitation thereon.

[0052] Figure 2 This is a circuit topology schematic diagram of an energy storage converter provided by an embodiment of the present invention. Figure 2 As shown, the energy storage converter includes but is not limited to:

[0053] The DC input unit 100 includes a DC power supply V dc , positive bus capacitor C up and negative bus capacitor C dw , positive bus capacitor C up and negative bus capacitor C dwThe positive and negative bus branches are connected in series, and the positive and negative bus branches are connected to the DC power supply V dc Connected in parallel, where the positive bus capacitor C up Set on the positive bus, negative bus capacitor C dw Set on the negative bus, the positive bus capacitor C up and negative bus capacitor C dw There are many specific specifications, which can be set according to specific scenarios, and there is no restriction here;

[0054] The power unit 200 includes a power switch tube Q A1 , Q A2 , Q A3 , Q A4 , Q B1 , Q B2 , Q B3 , Q B4 , Q C1 , Q C2 , Q C3 and Q C4 , and diode D A1 , D A2 , D B1 , D B2 , D C1 , D C2 , D N1 and D N2 ;

[0055] The AC filter unit 300 includes three LCL filters, namely L A1 , C A , L A2 , L B1 , C B , L B2 , L C1 , C C and L C2 .

[0056] In application, the AC side collects the current flowing through the inductor L A1 , L B1 and L C1 The current I LA ,I LB and I LC And the capacitor C A , C B and C C Voltage V CA 、V CB and V CC , collect the grid-connected inductance L A2 , L B2 and L C2 The current I oA ,IoB and I oC , and the grid voltage V a 、V b and V c ; DC side collects positive bus capacitor C up Voltage across the terminals U up , negative bus capacitance C dw Voltage across the terminals U dw And the battery side current I Bat .

[0057] After collecting the above parameters, Figure 3 As shown, firstly, the phase is locked according to the collected grid-side voltage to obtain the phase angle θ of the grid-side voltage. Then, referring to FIG4 (a) and FIG4 (b), the collected grid-side voltage V a 、V b and V c , grid-side current I oA ,I oB and I oC After three-phase-two-phase coordinate transformation, the grid side is obtained Shaft voltage , Network side Shaft voltage , Network side Shaft current and network side Shaft current ; The following is a specific method for calculating the grid-side active power and grid-side reactive power. For example, Mutually, The calculation method of phase can refer to A similar calculation is performed, as shown below:

[0058] ;

[0059] in, for The corresponding grid-side active power is: for The corresponding grid-side reactive power is for The expression of the phase grid voltage (i.e. the grid voltage V a ), for Phase grid current, for Hysteresis The expression of the grid voltage after .

[0060] The energy storage converter and application scenario described in the embodiment of the present invention are intended to more clearly illustrate the technical solution of the embodiment of the present invention, and do not constitute a limitation on the technical solution provided by the embodiment of the present invention. Those skilled in the art can know that with the evolution of the energy storage converter and the emergence of new application scenarios, the technical solution provided by the embodiment of the present invention is also applicable to similar technical problems.

[0061] It can be understood by those skilled in the art that Figure 2 The energy storage converter shown in the figure does not constitute a limitation on the embodiments of the present invention, and may include more or fewer components than those shown in the figure, or combine certain components, or arrange the components differently.

[0062] In one embodiment of the present invention, step S2000 may include, but is not limited to, the following steps:

[0063] Step S2100: Substitute the active power outer loop output current and the reactive power outer loop output current into a given current calculation formula for calculation to obtain a current loop given current, wherein the given current calculation formula is as follows:

[0064]

[0065] in, for Phase current loop given current, for Phase active power outer loop output current, for Phase reactive power outer loop output current; for Phase current loop given current, for Phase active power outer loop output current, for Phase reactive power outer loop output current; for Phase current loop given current, for Phase active power outer loop output current, for Phase reactive power outer loop output current.

[0066] Combining the above given current calculation formula, it can be seen that The initial phase of the phase is 0, The initial phase of the phase is , The initial phase of the phase is , that is, the phase difference between each adjacent phase , the phase sum of the three phases is Of course, this is just one case. In the actual process, the phase difference of each phase may also take other specific values, which are not limited here.

[0067] like Figure 5 As shown, in one embodiment of the present invention, the steps in step S1000, controlling and adjusting the acquired grid-side active power of the energy storage converter through a preconfigured power outer loop to obtain the active power outer loop output current, may include but is not limited to the following steps:

[0068] Step S1100: for each single phase, input a first adjustment component into a control unit of a preconfigured power outer loop, wherein the first adjustment component is a difference between a given active power corresponding to the single phase and the grid-side active power;

[0069] Step S1200: After passing through the control unit of the power outer loop, the given active power corresponding to the single pair is used as the feedforward introduction amount of the power outer loop, thereby converting to obtain the active power outer loop output current.

[0070] In this step, the active power outer loop output current can be respectively: , and , which is calculated in a similar way. For example, refer to Figure 6 , first obtain (Right now The corresponding given active power) and The difference between The first adjustment component corresponding to the first adjustment component is then input into the control unit of the power outer loop, which control unit may be but is not limited to Figure 6 The PI controller shown in the figure is then output by the control unit of the power outer loop. As the feedforward introduction of the power outer loop, the corresponding power output result is obtained, and finally the power output result is processed as follows Figure 6 The current conversion shown is divided by The effective value of the phase grid voltage is obtained .

[0071] It can be seen that the corresponding active power outer loop output current can be accurately and reliably obtained through the control and adjustment of the power outer loop to achieve power compensation. The whole process does not require changing the load connection relationship of the energy storage converter, which makes control more convenient and has a lower overall cost.

[0072] like Figure 7As shown, in one embodiment of the present invention, the steps in step S1000, controlling and adjusting the acquired grid-side reactive power of the energy storage converter through a preconfigured power outer loop to obtain the reactive power outer loop output current, may include but is not limited to the following steps:

[0073] Step S1300: For each single phase, input a second adjustment component into a control unit of a preconfigured power outer loop, wherein the second adjustment component is a difference between a given reactive power corresponding to the single phase and a grid-side reactive power;

[0074] Step S1400: After passing through the control unit of the power outer loop, the given reactive power corresponding to the single signal is used as the feedforward introduction amount of the power outer loop, thereby converting to obtain the reactive power outer loop output current.

[0075] In this step, the reactive power outer loop output current can be respectively: , and , which is calculated in a similar way. For example, refer to Figure 8 , first obtain (Right now The corresponding given reactive power) and The difference between The corresponding second adjustment component is then input into the control unit of the power outer loop, which may be, but is not limited to, Figure 8 The PI controller shown in the figure is then output by the control unit of the power outer loop. As the feedforward introduction of the power outer loop, the corresponding power output result is obtained, and finally the power output result is processed as follows Figure 8 The current conversion shown is divided by The effective value of the phase grid voltage is obtained .

[0076] It can be seen that the corresponding reactive power outer loop output current can be accurately and reliably obtained through the control and adjustment of the power outer loop to achieve power compensation. The whole process does not require changing the load connection relationship of the energy storage converter, which makes control more convenient and has a lower overall cost.

[0077] like Fig. 9 As shown, in one embodiment of the present invention, when the current loop given current includes Phase current loop given current, Phase current loop given current and Phase current loop given current, step S3000 may include but is not limited to the following steps:

[0078] Step S3100: Phase current loop given current, Phase current loop given current and The phase current loop gives the current and performs three-phase-two-phase coordinate transformation, and the corresponding grid side Axis given current, grid side Axis given current and grid side Axis given current;

[0079] Step S3200: The shaft set current is input to the first regulating branch in the current inner loop and output to the grid side The shaft drive voltage, as well as the grid side The shaft set current is input to the second regulating branch in the current inner loop and output to the grid side. The shaft drive voltage, as well as the grid side The shaft given current is input to the third regulating branch in the current inner loop and output to the grid side Shaft drive voltage;

[0080] Step S3300: Network side Shaft drive voltage, grid side Shaft drive voltage and grid side The shaft drive voltage is subjected to SPWM modulation processing to obtain the drive signal of the energy storage converter.

[0081] It should be noted that the execution methods of the three steps in step S3200 are similar, and the difference lies only in the different adjustment branches involved. To avoid redundancy, only the step of "adding the network side The shaft set current is input to the first regulating branch in the current inner loop and output to the grid side Specifically, the step may include but is not limited to:

[0082] Step S3210: Get network side The shaft current is determined by the grid side The difference between the shaft currents is used to obtain the third adjustment component;

[0083] Step S3220: input the third adjustment component into the control unit of the first adjustment branch, and after passing through the control unit of the first adjustment branch, the grid side The shaft voltage is used as the feedforward input of the first regulating branch, thereby outputting the grid side Shaft drive voltage.

[0084] It can be seen that the drive signals of each power switch tube inside the energy storage converter can be accurately and reliably obtained through the control and adjustment of the inner current loop. The whole process does not require changing the load phase connection relationship of the energy storage converter. It is more convenient to control and has a lower overall cost. It can not only effectively solve the problem of imbalance in the three-phase area of ​​the energy storage converter, but also is more conducive to realizing fast and smooth charging and discharging mode switching of the energy storage converter.

[0085] Specifically, Fig.10 As shown, first , and Perform three-phase-two-phase coordinate transformation to obtain the grid side Axis given current , Network side Axis given current and network side Axis given current ; Further, refer to Fig.11 , taking the first regulating branch as an example, first obtain With the network side Shaft current The difference between the two is used to obtain the third adjustment component, and then the third adjustment component is input into the control unit of the current inner loop. The control unit may be, but is not limited to, Fig.11 The PI controller shown in the figure is then output by the control unit of the current inner loop to the grid side. Shaft voltage As the feedforward input of the current inner loop, the corresponding grid side Shaft drive voltage , and so on, we can get the network side Shaft drive voltage , Network side Shaft drive voltage , and finally , and Perform SPWM modulation processing, wherein the SPWM modulation processing may include but is not limited to: first perform a three-phase-to-two-phase coordinate inverse transformation to obtain a conversion result, and then perform SPWM modulation on the conversion result to obtain a drive signal for each power switch tube in the energy storage converter.

[0086] Fig.12 FIG. 1 is a schematic diagram of the structure of an electronic device 1000 provided by an embodiment of the present invention. Fig.12 As shown, the electronic device 1000 includes a memory 1100 and a processor 1200. The number of the memory 1100 and the processor 1200 may be one or more. Fig.12In the embodiment, a memory 1100 and a processor 1200 are taken as an example; the memory 1100 and the processor 1200 in the device may be connected via a bus or other means. Fig.12 The example of connecting through bus is taken in the following.

[0087] The memory 1100, as a computer-readable storage medium, can be used to store software programs, computer executable programs and modules, such as program instructions / modules corresponding to the power control method of the energy storage converter provided in any embodiment of the present invention. The processor 1200 implements the power control method of the energy storage converter by running the software programs, instructions and modules stored in the memory 1100.

[0088] The memory 1100 may mainly include a program storage area and a data storage area, wherein the program storage area may store an operating system and an application required for at least one function. In addition, the memory 1100 may include a high-speed random access memory, and may also include a non-volatile memory, such as at least one disk storage device, a flash memory device, or other non-volatile solid-state storage device. In some instances, the memory 1100 may further include a memory remotely arranged relative to the processor 1200, and these remote memories may be connected to the device via a network. Examples of the above-mentioned network include, but are not limited to, the Internet, an intranet, a local area network, a mobile communication network, and combinations thereof.

[0089] An embodiment of the present invention further provides a computer-readable storage medium storing computer-executable instructions, wherein the computer-executable instructions are used to execute the power control method of the energy storage converter provided in any embodiment of the present invention.

[0090] An embodiment of the present invention further provides a computer program product, including a computer program or computer instructions, wherein the computer program or computer instructions are stored in a computer-readable storage medium, a processor of a computer device reads the computer program or computer instructions from the computer-readable storage medium, and the processor executes the computer program or computer instructions, so that the computer device executes the power control method of the energy storage inverter provided in any embodiment of the present invention.

[0091] The electronic devices and application scenarios described in the embodiments of the present invention are intended to more clearly illustrate the technical solutions of the embodiments of the present invention, and do not constitute a limitation on the technical solutions provided by the embodiments of the present invention. Those skilled in the art will appreciate that with the evolution of electronic devices and the emergence of new application scenarios, the technical solutions provided by the embodiments of the present invention are equally applicable to similar technical problems.

[0092] Those skilled in the art will appreciate that all or some of the steps in the methods disclosed above, and the functional modules / units in the systems and devices may be implemented as software, firmware, hardware, or a suitable combination thereof.

[0093] In hardware implementation, the division between the functional modules / units mentioned in the above description does not necessarily correspond to the division of physical components; for example, a physical component may have multiple functions, or a function or step may be performed by several physical components in cooperation. Some or all physical components may be implemented as software executed by a processor, such as a central processing unit, a digital signal processor, or a microprocessor, or implemented as hardware, or implemented as an integrated circuit, such as an application-specific integrated circuit. Such software may be distributed on a computer-readable medium, which may include a computer storage medium (or non-transitory medium) and a communication medium (or transient medium). As is well known to those of ordinary skill in the art, the term computer storage medium includes volatile and non-volatile, removable and non-removable media implemented in any method or technology for storing information (such as computer-readable instructions, data structures, program modules, or other data). Computer storage media include, but are not limited to, RAM, ROM, EEPROM, flash memory or other memory technology, CD-ROM, digital versatile disk (DVD) or other optical disk storage, magnetic cassettes, magnetic tapes, disk storage or other magnetic storage devices, or any other medium that can be used to store desired information and can be accessed by a computer. Furthermore, it is well known to those skilled in the art that communication media typically embodies computer readable instructions, data structures, program modules, or other data in a modulated data signal such as a carrier wave or other transport mechanism, and may include any information delivery media.

[0094] The terms "component", "module", "system", etc. used in this specification are used to represent computer-related entities, hardware, firmware, a combination of hardware and software, software, or software in execution. For example, a component can be, but is not limited to, a process running on a processor, a processor, an object, an executable file, an execution thread, a program, or a computer. By way of illustration, both applications running on a computing device and a computing device can be components. One or more components may reside in a process or an execution thread, and a component may be located on a computer or distributed between two or more computers. In addition, these components may be executed from various computer-readable media having various data structures stored thereon. Components may communicate, for example, through local or remote processes based on signals having one or more data packets (e.g., data from two components interacting with another component between a local system, a distributed system, or a network, such as the Internet interacting with other systems through signals).

Claims

1. A power control method for an energy storage converter, characterized in that: include: The obtained grid-side active power and grid-side reactive power of the energy storage converter are controlled and adjusted respectively through a preconfigured power outer loop to obtain corresponding active power outer loop output current and reactive power outer loop output current; Determining a current loop given current according to the active power outer loop output current and the reactive power outer loop output current; Controlling and adjusting the given current of the current loop through a preconfigured current inner loop to obtain a driving signal of the energy storage converter; Wherein, determining the current loop given current according to the active power outer loop output current and the reactive power outer loop output current comprises: Substitute the active power outer loop output current and the reactive power outer loop output current into a given current calculation formula for calculation to obtain a current loop given current, wherein the given current calculation formula is as follows: Among them, I a_ref is the given current of phase a current loop, I a_P is the a-phase active power outer loop output current, I a_Q is the a-phase reactive power outer loop output current; I b_ref is the given current of phase b current loop, I b_P is the b-phase active power outer loop output current, I b_Q is the b-phase reactive power outer loop output current; I c_ref is the given current of phase c current loop, I c_P is the c-phase active power outer loop output current, I c_Q is the c-phase reactive power outer loop output current.

2. The power control method of the energy storage converter according to claim 1, characterized in that: The obtained grid-side active power of the energy storage converter is controlled and adjusted through the preconfigured power outer loop to obtain the active power outer loop output current, including: For each single phase, inputting a first regulating component into a control unit of a preconfigured power outer loop, wherein the first regulating component is a difference between a given active power corresponding to the single phase and the grid-side active power; After passing through the control unit of the power outer loop, the given active power corresponding to the single phase is used as the feedforward introduction amount of the power outer loop, thereby converting to obtain the active power outer loop output current.

3. The power control method of the energy storage converter according to claim 1, characterized in that: The obtained grid-side reactive power of the energy storage converter is controlled and adjusted through a preconfigured power outer loop to obtain a reactive power outer loop output current, including: For each single phase, inputting a second regulating component into a control unit of a preconfigured power outer loop, wherein the second regulating component is a difference between a given reactive power corresponding to the single phase and the grid-side reactive power; After passing through the control unit of the power outer loop, the given reactive power corresponding to the single phase is used as the feedforward introduction amount of the power outer loop, thereby converting to obtain the reactive power outer loop output current.

4. The power control method of the energy storage converter according to claim 1, characterized in that: The current loop given current includes a phase a current loop given current, a phase b current loop given current and a phase c current loop given current, and the current loop given current is controlled and adjusted by a preconfigured current inner loop to obtain a drive signal of the energy storage converter, including: Perform three-phase-to-two-phase coordinate transformation on the a-phase current loop given current, the b-phase current loop given current and the c-phase current loop given current respectively, and obtain the grid-side d-axis given current, the grid-side q-axis given current and the grid-side z-axis given current accordingly; Input the grid-side d-axis given current into the first regulating branch in the current inner loop to output a grid-side d-axis driving voltage, and input the grid-side q-axis given current into the second regulating branch in the current inner loop to output a grid-side q-axis driving voltage, and input the grid-side z-axis given current into the third regulating branch in the current inner loop to output a grid-side z-axis driving voltage; The grid-side d-axis driving voltage, the grid-side q-axis driving voltage and the grid-side z-axis driving voltage are subjected to SPWM modulation processing to obtain a driving signal of the energy storage converter.

5. The power control method of the energy storage converter according to claim 4, characterized in that: The step of inputting the grid-side d-axis given current into the first regulating branch in the current inner loop and outputting the grid-side d-axis driving voltage comprises: Obtaining a difference between the grid-side d-axis given current and a predetermined grid-side d-axis current to obtain a third adjustment component; The third regulating component is input into the control unit of the first regulating branch. After passing through the control unit of the first regulating branch, the grid-side d-axis voltage is used as the feedforward introduction amount of the first regulating branch, thereby outputting the grid-side d-axis driving voltage.

6. An electronic device, characterized in that: include: at least one processor; at least one memory for storing at least one program; When at least one of the programs is executed by at least one of the processors, the power control method for the energy storage converter as described in any one of claims 1 to 5 is implemented.

7. A computer-readable storage medium, characterized in that: A program executable by a processor is stored therein, and when the program executable by the processor is executed by the processor, it is used to implement the power control method of the energy storage converter as described in any one of claims 1 to 5.

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