A network configuration type control implementation method and device of an all-electronic power power system

Abstract

The application discloses a network construction type control implementation method and device of a full power electronic power system. The method comprises the following steps: generating a unified synchronous phase angle of the full power electronic power system by using a high-precision Beidou satellite timing function; constructing a virtual speed regulator, a virtual rotor structure and a virtual excitation regulator of an electronic power converter; outputting an electromotive force phase angle and an output voltage amplitude of the electronic power converter according to the virtual speed regulator, the virtual rotor structure and the virtual excitation regulator; and synthesizing an electromotive force voltage vector of the electronic power converter according to the electromotive force phase angle, the output voltage amplitude and the synchronous phase angle.

Description

Technical Field

[0001] This invention relates to the field of all-power electronic power system technology, and more specifically, to a method and apparatus for implementing grid-based control of an all-power electronic power system. Background Technology

[0002] For over a century, power systems have been built around AC synchronous generators. However, with the rapid development of new energy power generation, new semiconductor materials, and control technologies, power systems are increasingly integrating power electronic converters across their power generation, grid, load, and storage systems. Power source attributes are fundamental to the construction and stable control of power systems. New energy sources that generate electricity via converters, with their rapid dynamic response and the difficulty in autonomously controlling frequency and voltage characteristics, are gradually revolutionizing the construction and stable control technologies of traditional AC systems.

[0003] When AC synchronous generators remain the dominant power source in the system, the system's frequency and voltage are determined by the interaction of the generator units, based on voltage source characteristics and rotational inertia. However, in a fully power electronic power system where the power source is 100% renewable, the renewable energy needs to be connected to the grid via power electronic converters, which also need to provide support capabilities to the power system, such as frequency and voltage support. In this case, the system's frequency and voltage will be determined and supported by the converter-type power source, ensuring stable power supply to the load. Therefore, grid-forming (GFM) converters are required to achieve system-level networking and stable control. Furthermore, the full dynamic process after a fault in a fully power electronic system exhibits important characteristics that distinguish it from traditional synchronous AC systems, such as rapid dynamic response, multi-timescale coupling, control switching, and amplitude limiting.

[0004] The grid-based control strategy originates from the simulation of the dynamic characteristics of synchronous machines. GFM converters and grid-connected converters have different operating characteristics. Their differences lie in their response to grid disturbances. Grid-connected converters exhibit current source characteristics; when the grid connection voltage is disturbed, before the phase-locked loop (PLL) can correctly lock the phase, the grid-connected converter tends to maintain the amplitude and phase angle of the output current unchanged, but this inevitably leads to sudden changes in the output voltage, which is detrimental to maintaining voltage stability. GFM converters exhibit voltage source characteristics; when the grid connection voltage is disturbed, they tend to maintain a constant internal potential, which is beneficial for maintaining voltage stability, but will inevitably lead to sudden changes in the output current, potentially causing overcurrent and damaging the converter hardware. In summary, the stability control of all-power electronic power systems faces the challenge of lacking system-level autonomous voltage / frequency networking mechanisms and core technologies. Summary of the Invention

[0005] To address the shortcomings of existing technologies, this invention provides a method and apparatus for implementing grid-based control of an all-power electronic power system.

[0006] According to one aspect of the present invention, a method for implementing grid-based control of an all-power electronic power system is provided, comprising:

[0007] The high-precision BeiDou satellite timing function is used to generate a unified synchronization phase angle for the entire power electronic power system;

[0008] By utilizing the relationship between frequency deviation and output power to simulate the primary frequency regulation characteristics of a synchronous generator, a virtual speed controller for a power electronic converter is constructed.

[0009] Based on the rotor operation equations of the synchronous generator, a virtual rotor structure for the power electronic converter is constructed.

[0010] Based on the characteristic of the synchronous generator to adjust the stator winding terminal voltage by changing the magnitude of its excitation current, a virtual excitation regulator for the power electronic converter is constructed.

[0011] Based on the virtual speed controller, the virtual rotor structure, and the virtual excitation regulator, the electromotive force phase angle and output voltage amplitude of the power electronic converter are output;

[0012] The electromotive force voltage vector of the power electronic converter is synthesized based on the electromotive force phase angle, the output voltage amplitude, and the synchronization phase angle. The electromotive force voltage vector provides inertial support and voltage support capability for the grid connection requirements of the power electronic converter.

[0013] Optionally, the high-precision BeiDou satellite timing function is used to generate a unified synchronization phase angle for the entire power electronic power system, including:

[0014] It receives the first pulse signal from the BeiDou satellite and simultaneously acquires the second pulse signal from a high-precision temperature-controlled crystal oscillator;

[0015] The first pulse signal of 1pps is divided by the second pulse signal of predetermined Hertz to output a third pulse signal of 50Hz, and the count value of the counter is recorded.

[0016] The synchronization phase angle is calculated based on the count value of the third pulse signal in each clock cycle, wherein the converter in the all-power electronic power system ensures the normal operation of the system's AC equipment based on the synchronization phase angle.

[0017] Optionally, it further includes: connecting the 10MHz output second pulse signal of the high-precision thermostatic crystal oscillator to the allocated clock to provide a clock signal for the operation of the all-power electronic power system.

[0018] Optionally, the 1pps first pulse signal is divided by a predetermined second pulse signal of a certain hertz to output a 50Hz third pulse signal, and the counter value is recorded, including:

[0019] When the rising edge of the first pulse signal of the 1PPS Beidou satellite signal is detected, counting begins, and the second pulse signal of a predetermined hertz is counted. The counting range of the counter is 1 to M / 50, where M is the predetermined hertz.

[0020] Whenever the value of the counter is 2, the counter counts for two clock cycles, and sets the WINDOW level high at the falling edge of the first clock cycle and sets the WINDOW level low at the falling edge of the second clock cycle, generating a window signal with a period of 0.02s. The rising edge of the clock within the window signal is the rising edge of the high-precision thermostatic crystal oscillator signal.

[0021] The window signal and the second pulse signal are logically ANDed to achieve frequency division from the predetermined Hertz second pulse signal to the 50Hz third pulse signal.

[0022] Optionally, the formula for calculating the synchronization phase angle is:

[0023]

[0024] In the formula, i is the count value of the counter, 1≤i≤M / 50+1, and M is the preset Hertz. When the WINDOW level is low, the counter starts counting again from 1.

[0025] Optionally, the formula for calculating the electromotive force voltage vector is:

[0026]

[0027] In the formula, θ i =θ g -θ,θ g The phase angle is the synchronous phase angle, θ is the electromotive force phase angle, and E is the phase angle. m This represents the output voltage amplitude.

[0028] According to another aspect of the present invention, a grid-type control implementation device for an all-power electronic power system is provided, comprising:

[0029] The generation module is used to generate a unified synchronization phase angle for the entire power electronic power system using the high-precision BeiDou satellite timing function;

[0030] The first building module is used to simulate the primary frequency regulation characteristics of a synchronous generator by utilizing the relationship between the frequency deviation value and the output power, and to build a virtual speed governor for the power electronic converter.

[0031] The second construction module is used to construct the virtual rotor structure of the power electronic converter based on the rotor operation equation of the synchronous generator;

[0032] The third construction module is used to construct a virtual excitation regulator for the power electronic converter based on the characteristic that the synchronous generator can adjust the stator winding terminal voltage by changing the magnitude of its excitation current.

[0033] The output module is used to output the electromotive force phase angle and output voltage amplitude of the power electronic converter based on the virtual speed controller, the virtual rotor structure and the virtual excitation regulator;

[0034] The synthesis module is used to synthesize the electromotive force voltage vector of the power electronic converter based on the electromotive force phase angle, the output voltage amplitude, and the synchronization phase angle, wherein the electromotive force voltage vector provides inertial support and voltage support capability for the grid connection requirements of the power electronic converter.

[0035] According to another aspect of the present invention, a computer-readable storage medium is provided, the storage medium storing a computer program for performing the methods described in any of the above aspects of the present invention.

[0036] According to another aspect of the present invention, an electronic device is provided, the electronic device comprising: a processor; a memory for storing executable instructions of the processor; the processor being configured to read the executable instructions from the memory and execute the instructions to implement the method described in any of the preceding aspects of the present invention.

[0037] Therefore, this application proposes a method for implementing a grid-type control strategy for an all-power electronic power system based on high-precision satellite timing. This method unifies the frequency of the all-power electronic power system to 50Hz according to the BeiDou satellite signal and obtains the synchronization phase angle θ. g This allows new energy power generation systems based on grid-based control strategies to proactively transfer some or all of their reserve power to the system when the system frequency deviation exceeds the frequency regulation threshold, providing frequency support. It also allows for the regulation of the grid connection voltage to maintain grid stability. Furthermore, it simulates the mechanical structure of a traditional synchronous generator, controlling power electronic devices to mimic the rotor motion characteristics and achieve inertial support for the AC grid. The relationship between frequency deviation and output power is used to simulate the primary frequency regulation characteristics of a synchronous generator, adjusting the output power of the new energy source based on grid-based control to meet load power demands. The magnitude of the synchronous generator's excitation current is also simulated to regulate the terminal voltage. Finally, the unified θ-axis of the all-power electronic power system is utilized. g This enables the grid connection of power electronic converters based on grid-type control to meet grid connection requirements, providing inertia support and voltage support capabilities for all-power electronic power systems. Attached Figure Description

[0038] Exemplary embodiments of the present invention can be more fully understood by referring to the following figures:

[0039] Figure 1 This is a flowchart illustrating a grid-type control implementation method for an all-power electronic power system provided in an exemplary embodiment of the present invention;

[0040] Figure 2 This is a schematic diagram of an all-electric electronic power system provided in an exemplary embodiment of the present invention;

[0041] Figure 3 This is a flowchart of the synchronous generator operation provided by an exemplary embodiment of the present invention;

[0042] Figure 4 This is a phase angle generation diagram of the whole region unified synchronous coordinate transformation provided by an exemplary embodiment of the present invention;

[0043] Figure 5 This is a virtual rotor structure diagram of a power electronic converter provided in an exemplary embodiment of the present invention;

[0044] Figure 6 This is a structural diagram of a virtual speed controller for a power electronic converter provided in an exemplary embodiment of the present invention;

[0045] Figure 7 This is a structural diagram of a virtual excitation regulator for a power electronic converter provided in an exemplary embodiment of the present invention;

[0046] Figure 8 This is a system network control diagram based on full-area high-precision time synchronization provided by an exemplary embodiment of the present invention;

[0047] Figure 9 This is a schematic diagram of the structure of a grid-type control implementation device for an all-power electronic power system provided in an exemplary embodiment of the present invention;

[0048] Figure 10 This is the structure of an electronic device provided in an exemplary embodiment of the present invention. Detailed Implementation

[0049] Hereinafter, exemplary embodiments according to the present invention will be described in detail with reference to the accompanying drawings. Obviously, the described embodiments are merely some embodiments of the present invention, and not all embodiments of the present invention. It should be understood that the present invention is not limited to the exemplary embodiments described herein.

[0050] It should be noted that, unless otherwise specifically stated, the relative arrangement, numerical expressions, and values ​​of the components and steps described in these embodiments do not limit the scope of the invention.

[0051] Those skilled in the art will understand that the terms "first," "second," etc., in the embodiments of the present invention are only used to distinguish different steps, devices, or modules, and do not represent any specific technical meaning, nor do they indicate a necessary logical order between them.

[0052] It should also be understood that in the embodiments of the present invention, "multiple" can refer to two or more, and "at least one" can refer to one, two or more.

[0053] It should also be understood that any component, data or structure mentioned in the embodiments of the present invention can generally be understood as one or more unless explicitly defined or given contrary instructions in the context.

[0054] Furthermore, the term "and / or" in this invention is merely a description of the relationship between related objects, indicating that three relationships can exist. For example, A and / or B can represent: A existing alone, A and B existing simultaneously, or B existing alone. Additionally, the character " / " in this invention generally indicates that the preceding and following related objects have an "or" relationship.

[0055] It should also be understood that the description of the various embodiments in this invention emphasizes the differences between the various embodiments, and the similarities or similarities can be referred to each other. For the sake of brevity, they will not be described in detail.

[0056] At the same time, it should be understood that, for ease of description, the dimensions of the various parts shown in the accompanying drawings are not drawn according to actual scale.

[0057] The following description of at least one exemplary embodiment is merely illustrative and is in no way intended to limit the invention or its application or use.

[0058] Techniques, methods, and equipment known to those skilled in the art may not be discussed in detail, but where appropriate, they should be considered part of the specification.

[0059] It should be noted that similar labels and letters in the following figures indicate similar items; therefore, once an item is defined in one figure, it does not need to be discussed further in subsequent figures.

[0060] The embodiments of this invention can be applied to electronic devices such as terminal devices, computer systems, and servers, and can operate together with a wide range of other general-purpose or special-purpose computing system environments or configurations. Well-known examples of terminal devices, computing systems, environments, and / or configurations suitable for use with terminal devices, computer systems, servers, and other electronic devices include, but are not limited to: personal computer systems, server computer systems, thin clients, thick clients, handheld or laptop devices, microprocessor-based systems, set-top boxes, programmable consumer electronics, network PCs, minicomputer systems, mainframe computer systems, and distributed cloud computing environments including any of the above systems, etc.

[0061] Electronic devices such as terminal devices, computer systems, and servers can be described in the general context of computer system executable instructions (such as program modules) executed by a computer system. Typically, program modules can include routines, programs, object programs, components, logic, data structures, etc., which perform specific tasks or implement specific abstract data types. Computer systems / servers can be implemented in distributed cloud computing environments, where tasks are executed by remote processing devices linked through communication networks. In distributed cloud computing environments, program modules can reside on local or remote computing system storage media, including storage devices.

[0062] Exemplary methods

[0063] Figure 1 This is a schematic flowchart illustrating a grid-based control implementation method for an all-power electronic power system provided in an exemplary embodiment of the present invention. This embodiment can be applied to electronic devices, such as... Figure 1 As shown, the grid-based control implementation method 100 for a fully power electronic power system includes the following steps:

[0064] Step 101: Utilize the high-precision BeiDou satellite timing function to generate a unified synchronization phase angle for the entire power electronic power system;

[0065] Step 102: Using the relationship between frequency deviation and output power, the primary frequency regulation characteristics of a synchronous generator are simulated to construct a virtual speed controller for the power electronic converter.

[0066] Step 103: Construct the virtual rotor structure of the power electronic converter based on the rotor operation equation of the synchronous generator;

[0067] Step 104: Based on the characteristic that the synchronous generator can adjust the stator winding terminal voltage by changing the magnitude of its excitation current, construct the virtual excitation regulator of the power electronic converter.

[0068] Step 105: Based on the virtual speed controller, the virtual rotor structure, and the virtual excitation regulator, output the electromotive force phase angle and output voltage amplitude of the power electronic converter.

[0069] Step 106: Based on the electromotive force phase angle, the output voltage amplitude, and the synchronization phase angle, synthesize the electromotive force voltage vector of the power electronic converter, wherein the electromotive force voltage vector provides inertial support and voltage support capability for the grid connection requirements of the power electronic converter.

[0070] Specifically, a fully power electronic power system is composed of power electronic converters of different capacities and control methods, reshaping the power system through "conversion and control". When using traditional vector control strategies, the system exhibits characteristics such as near-zero inertia, no voltage / frequency mechanical support, tight coupling across multiple time scales, and dynamic response speeds at the millisecond or even microsecond level, overturning the traditional synchronous construction foundation of AC systems based on "mechanical-electromagnetic coupling".

[0071] Figure 2 This is a schematic diagram of a fully electronic power system, which consists of five parts: 100% new energy, energy storage system, electronic reactive power compensation equipment, electronic transmission network, and load.

[0072] Unlike electromagnetic conversion devices used in synchronous generators, new energy sources transmit power to the electronic power grid via power electronic converters. Their dynamic operating characteristics cannot be described by the physical process of rotor motion equations, but are dominated by the controllable process of power electronic devices.

[0073] There is a relationship between the power and torque of a synchronous generator:

[0074]

[0075] As can be seen from the above equation, the mechanical torque and electromagnetic torque of a synchronous generator can be described using the relationship between power and angular frequency.

[0076] To compare the characteristic relationships between synchronous generators and power electronic converters, we first analyze the phasor relationships of the synchronous generator and the loop equations of the main circuit of the power electronic converter, respectively. The terminal voltage of the synchronous generator... Grid-side voltage Depend on Figure 3 The second-order stator electrical equations of the synchronous generator are as follows:

[0077]

[0078] In the formula, This is the output current of the synchronous generator.

[0079] in, Figure 3 The parameters are: P m and P e These represent the mechanical power and electromagnetic power of the synchronous generator, respectively, e a e b and e c L is the magnetomotive force generated by the rotation of the excitation winding. s For synchronization reactance, R s The resistance of the three-phase stator winding of a synchronous generator, v a v b v c Synchronous generator terminal voltage, Q e The actual measured value of the reactive power output of the synchronous generator, and the terminal voltage of the synchronous generator.

[0080] The dynamic equations for the DC side of the power electronic converter can be written using KCL's law as follows:

[0081]

[0082] In the formula, C is the DC-side equivalent capacitance, IDC is the DC-side bus voltage, and IDD and IDA are the DC-side input current and output current, respectively.

[0083] By comparing equations (2) and (3), it can be seen that the mathematical models of synchronous generators and power electronic converters are basically the same. This uniformity provides a theoretical basis for power electronic converters based on GFM converter control strategies to mimic the electromagnetic power characteristics of synchronous generators.

[0084] (1) Unified synchronous coordinate transformation phase angle generation method

[0085] A method for generating phase angles through a unified synchronous coordinate transformation across the entire area of ​​a fully power electronic power system, such as... Figure 4 As shown, firstly, a digital frequency divider is used to divide the received 1Hz BeiDou satellite signal and the 10MHz high-precision temperature-controlled crystal oscillator pulse signal to obtain a 50Hz pulse signal.

[0086] The pulse signal of a high-precision cryogenic crystal oscillator within 1 second was divided into 50 parts, and each part has 2 × 10⁻⁶ pulses. 5 A pulse signal is used to obtain the synchronization phase angle θ of the all-power electronic power system. g for:

[0087]

[0088] In the formula, i is the number of pulse signals of the high-precision temperature-controlled crystal oscillator, 1≤i≤2×10 5 .

[0089] (2) Virtual rotor design

[0090] Since power electronic converters do not have the mechanical structure of synchronous generators, they cannot provide inertial support like the rotor of a synchronous generator. Therefore, power electronic converters need to simulate the rotor motion characteristics of a synchronous generator by controlling power electronic devices based on the rotor motion equation, so as to achieve inertial support for the AC power grid.

[0091] Drawing upon the rotor operating equations of synchronous generators to design the MMC virtual rotor structure, it can be seen that the virtual rotor structure of the power electronic converter is as follows: Figure 5 As shown, D P ω is the power droop coefficient, J is the rotor moment of inertia, and ω is the rotor moment of inertia. n T is the rated angular velocity of the power grid. e Electromagnetic torque.

[0092] (3) Virtual speed controller design

[0093] In designing a virtual speed governor for a power electronic converter, the relationship between frequency deviation and output power is used to mimic the primary frequency regulation characteristics of a synchronous generator. By adjusting the output power of new energy sources based on grid-connected control, the power demand of the load is met. Therefore, a structure for the virtual speed governor of the power electronic converter is proposed as follows: Figure 6 As shown, K d P is the virtual primary frequency modulation droop factor. NE The measured power.

[0094] (4) Virtual excitation regulator design

[0095] Synchronous generators can regulate the stator winding terminal voltage by changing the magnitude of their excitation current, thereby ensuring the balance of reactive power in the power system. Therefore, by simulating their characteristics, a virtual excitation regulator structure diagram of the power electronic converter is derived, as shown below. Figure 7 As shown, K q Q is the reactive power-voltage droop factor of the synchronous generator. * and Q e These represent the reference value and the actual measured value of the reactive power output of the synchronous generator, respectively, and the synchronous generator excitation current i. f , In the formula, U * U0 and U0 are the reference value and actual measured value of the effective value of the stator winding voltage of the synchronous generator, respectively, and G(s) is the excitation regulator of the synchronous generator. K q E represents the reactive power-voltage droop coefficient of the synchronous generator. m E represents the effective value of the excitation electromotive force of the synchronous generator. m =K2i f ,

[0096] From the virtual rotor, virtual speed controller, and virtual excitation regulator of the power electronic converter constructed above, reference values ​​for the electromotive force phase angle and output voltage amplitude of the power electronic converter can be obtained. A reference electromotive force voltage vector can then be synthesized, and its expression is:

[0097]

[0098] In summary, the overall control structure diagram of the GFM control strategy for power electronic converters is as follows: Figure 8 As shown.

[0099] This invention utilizes high-precision satellite timing technology to generate a unified synchronous coordinate transformation phase angle θ for the entire region of a 100% renewable energy-based all-power electronic power system. g As shown in formula (4), the entire region needs to be determined according to... Figure 4 The coordinate phase angle, based on grid-type control technology, transmits the electricity generated by new energy sources into the power electronic transmission network, and provides inertia support and voltage support to it, such as... Figure 5 As shown. Finally, based on operational requirements, it can be ensured that all power electronic components of the all-power electronic power system can operate normally.

[0100] Therefore, this application proposes a method for implementing a grid-type control strategy for an all-power electronic power system based on high-precision satellite timing. This method unifies the frequency of the all-power electronic power system to 50Hz according to the BeiDou satellite signal and obtains the synchronization phase angle θ. g This allows new energy power generation systems based on grid-based control strategies to proactively transfer some or all of their reserve power to the system when the system frequency deviation exceeds the frequency regulation threshold, providing frequency support. It also allows for the regulation of the grid connection voltage to maintain grid stability. Furthermore, it simulates the mechanical structure of a traditional synchronous generator, controlling power electronic devices to mimic the rotor motion characteristics and achieve inertial support for the AC grid. The relationship between frequency deviation and output power is used to simulate the primary frequency regulation characteristics of a synchronous generator, adjusting the output power of the new energy source based on grid-based control to meet load power demands. The magnitude of the synchronous generator's excitation current is also simulated to regulate the terminal voltage. Finally, the unified θ-axis of the all-power electronic power system is utilized. g This enables the grid connection of power electronic converters based on grid-type control to meet grid connection requirements, providing inertia support and voltage support capabilities for all-power electronic power systems.

[0101] Exemplary device

[0102] Figure 9 This is a schematic diagram of the structure of a grid-type control implementation device for a fully power electronic power system provided in an exemplary embodiment of the present invention. Figure 9 As shown, the device 900 includes:

[0103] The generation module 910 is used to generate a unified synchronization phase angle for the entire power electronic power system using the high-precision Beidou satellite timing function;

[0104] The first construction module 920 is used to simulate the primary frequency regulation characteristics of a synchronous generator by utilizing the relationship between the frequency deviation value and the output power, and to construct a virtual speed governor for the power electronic converter.

[0105] The second construction module 930 is used to construct the virtual rotor structure of the power electronic converter based on the rotor operation equation of the synchronous generator;

[0106] The third construction module 940 is used to construct a virtual excitation regulator for the power electronic converter based on the characteristic that the synchronous generator can adjust the stator winding terminal voltage by changing the magnitude of its excitation current.

[0107] Output module 950 is used to output the electromotive force phase angle and output voltage amplitude of the power electronic converter according to the virtual speed controller, the virtual rotor structure and the virtual excitation regulator;

[0108] The synthesis module 960 is used to synthesize the electromotive force voltage vector of the power electronic converter based on the electromotive force phase angle, the output voltage amplitude, and the synchronization phase angle, wherein the electromotive force voltage vector provides inertial support and voltage support capability for the grid connection requirements of the power electronic converter.

[0109] Optionally, the generation module 910 includes:

[0110] The receiving submodule is used to receive the first pulse signal of the Beidou satellite signal and simultaneously acquire the second pulse signal of the high-precision temperature-controlled crystal oscillator;

[0111] The frequency division submodule is used to divide the 1pps first pulse signal using the second pulse signal of a predetermined Hertz, output the third pulse signal of 50Hz, and record the counter value.

[0112] The calculation submodule is used to calculate the synchronization phase angle based on the count value of the third pulse signal in each clock cycle. In the all-power electronic power system, the converter ensures the normal operation of the AC equipment of the system based on the synchronization phase angle.

[0113] Optionally, the device 900 further includes a connection module for connecting a 10MHz second pulse signal output from a high-precision thermostatic crystal oscillator to an allocated clock to provide a clock signal for operation of the all-power electronic power system.

[0114] Optionally, the frequency division submodule includes:

[0115] The counting unit is used to start counting when the rising edge of the first pulse signal of the 1PPS Beidou satellite signal is detected, and to count the second pulse signal of a predetermined Hertz. The counting range of the counter is 1 to M / 50, where M is the predetermined Hertz.

[0116] The setting unit is used to set the WINDOW level high at the falling edge of the first clock cycle and set the WINDOW level low at the falling edge of the second clock cycle whenever the value of the counter is 2, generating a window signal with a period of 0.02s. The rising edge of the clock within the window signal is the rising edge of the high-precision thermostatic crystal oscillator signal.

[0117] The arithmetic unit is used to perform a logical AND operation between the window signal and the second pulse signal to achieve frequency division from the second pulse signal of a predetermined Hertz to the third pulse signal of 50Hz.

[0118] Optionally, the formula for calculating the synchronization phase angle is:

[0119]

[0120] In the formula, i is the count value of the counter, 1≤i≤M / 50+1, and M is the preset Hertz. When the WINDOW level is low, the counter starts counting again from 1.

[0121] Exemplary electronic devices

[0122] Figure 10 This is the structure of an electronic device provided in an exemplary embodiment of the present invention. For example... Figure 10 As shown, the electronic device 100 includes one or more processors 101 and memory 102.

[0123] The processor 101 may be a central processing unit (CPU) or other form of processing unit with data processing capabilities and / or instruction execution capabilities, and may control other components in the electronic device to perform desired functions.

[0124] The memory 102 may include one or more computer program products, which may include various forms of computer-readable storage media, such as volatile memory and / or non-volatile memory. The volatile memory may include, for example, random access memory (RAM) and / or cache memory. The non-volatile memory may include, for example, read-only memory (ROM), hard disk, flash memory, etc. One or more computer program instructions may be stored on the computer-readable storage medium, and the processor 101 may execute the program instructions to implement the methods of the software programs of the various embodiments of the present invention described above, and / or other desired functions. In one example, the electronic device may also include an input device 103 and an output device 104, these components being interconnected via a bus system and / or other forms of connection mechanisms (not shown).

[0125] In addition, the input device 103 may also include, for example, a keyboard, a mouse, etc.

[0126] The output device 104 can output various information to the outside. The output device 104 may include, for example, a display, a speaker, a printer, and a communication network and its connected remote output devices, etc.

[0127] Of course, for the sake of simplicity, Figure 10 Only some of the components of this electronic device relevant to the present invention are shown, omitting components such as buses, input / output interfaces, etc. In addition, the electronic device may include any other suitable components depending on the specific application.

[0128] Exemplary computer program products and computer-readable storage media

[0129] In addition to the methods and apparatus described above, embodiments of the present invention may also be computer program products, which include computer program instructions that, when executed by a processor, cause the processor to perform the steps in the methods according to various embodiments of the present invention described in the "Exemplary Methods" section above.

[0130] The computer program product can be written in any combination of one or more programming languages ​​to perform the operations of the embodiments of the present invention. The programming languages ​​include object-oriented programming languages ​​such as Java and C++, as well as conventional procedural programming languages ​​such as C or similar languages. The program code can be executed entirely on the user's computing device, partially on the user's computing device, as a standalone software package, partially on the user's computing device and partially on a remote computing device, or entirely on a remote computing device or server.

[0131] Furthermore, embodiments of the present invention may also be computer-readable storage media storing computer program instructions thereon, which, when executed by a processor, cause the processor to perform the steps of the methods according to various embodiments of the present invention described in the "Exemplary Methods" section above.

[0132] The computer-readable storage medium may be any combination of one or more readable media. A readable medium may be a readable signal medium or a readable storage medium. A readable storage medium may be, for example, an electrical, magnetic, optical, electromagnetic, infrared, or semiconductor system, device, or any combination thereof. More specific examples (a non-exhaustive list) of readable storage media include: an electrical connection having one or more wires, a portable disk, a hard disk, random access memory (RAM), read-only memory (ROM), erasable programmable read-only memory (EPROM or flash memory), optical fiber, portable compact disk read-only memory (CD-ROM), optical storage device, magnetic storage device, or any suitable combination thereof.

[0133] The basic principles of the present invention have been described above with reference to specific embodiments. However, it should be noted that the advantages, benefits, and effects mentioned in the present invention are merely examples and not limitations, and should not be considered as essential features of each embodiment of the present invention. Furthermore, the specific details disclosed above are for illustrative and facilitative purposes only, and are not limitations. These details do not limit the present invention to the necessity of employing the aforementioned specific details.

[0134] The various embodiments in this specification are described in a progressive manner, with each embodiment focusing on its differences from other embodiments. Similar or identical parts between embodiments can be referred to interchangeably. For system embodiments, since they largely correspond to method embodiments, the description is relatively simple; relevant parts can be referred to the descriptions in the method embodiments.

[0135] The block diagrams of devices, systems, devices, and systems involved in this invention are merely illustrative examples and are not intended to require or imply that they must be connected, arranged, or configured in the manner shown in the block diagrams. As those skilled in the art will recognize, these devices, systems, devices, and systems can be connected, arranged, and configured in any manner. Words such as “comprising,” “including,” “having,” etc., are open-ended terms meaning “including but not limited to,” and are used interchangeably with them. The terms “or” and “and” as used herein refer to the terms “and / or,” and are used interchangeably with them unless the context clearly indicates otherwise. The term “such as” as used herein refers to the phrase “such as but not limited to,” and is used interchangeably with it.

[0136] The methods and systems of the present invention may be implemented in many ways. For example, they may be implemented by software, hardware, firmware, or any combination of software, hardware, and firmware. The above-described order of steps for the methods is for illustrative purposes only, and the steps of the methods of the present invention are not limited to the order specifically described above unless otherwise specifically stated. Furthermore, in some embodiments, the present invention may also be implemented as a program recorded on a recording medium, the program comprising machine-readable instructions for implementing the methods according to the present invention. Thus, the present invention also covers recording media storing programs for performing the methods according to the present invention.

[0137] It should also be noted that in the systems, apparatus, and methods of the present invention, the components or steps can be disassembled and / or recombined. These disassemblies and / or recombinations should be considered equivalents of the present invention. The above description of the disclosed aspects is provided to enable any person skilled in the art to make or use the invention. Various modifications to these aspects will be readily apparent to those skilled in the art, and the general principles defined herein can be applied to other aspects without departing from the scope of the invention. Therefore, the invention is not intended to be limited to the aspects shown herein, but rather to be carried out within the widest scope consistent with the principles and novel features disclosed herein.

[0138] The above description has been given for purposes of illustration and description. Furthermore, this description is not intended to limit the embodiments of the invention to the forms disclosed herein. Although numerous exemplary aspects and embodiments have been discussed above, those skilled in the art will recognize certain variations, modifications, alterations, additions, and sub-combinations therein.

Claims

1. A method for implementing grid-based control of an all-power electronic power system, characterized in that, include: The high-precision BeiDou satellite timing function is used to generate a unified synchronization phase angle for the entire power electronic power system; By utilizing the relationship between frequency deviation and output power to simulate the primary frequency regulation characteristics of a synchronous generator, a virtual speed controller for a power electronic converter is constructed. Based on the rotor operation equations of the synchronous generator, a virtual rotor structure for the power electronic converter is constructed. Based on the characteristic of the synchronous generator to adjust the stator winding terminal voltage by changing the magnitude of its excitation current, a virtual excitation regulator for the power electronic converter is constructed. Based on the virtual speed controller, the virtual rotor structure, and the virtual excitation regulator, the electromotive force phase angle and output voltage amplitude of the power electronic converter are output; The electromotive force voltage vector of the power electronic converter is synthesized based on the electromotive force phase angle, the output voltage amplitude, and the synchronization phase angle. The electromotive force voltage vector provides inertial support and voltage support capability for the grid connection requirements of the power electronic converter. The high-precision BeiDou satellite timing function is used to generate a unified synchronization phase angle for the entire power electronic power system, including: It receives the first pulse signal from the BeiDou satellite and simultaneously acquires the second pulse signal from a high-precision temperature-controlled crystal oscillator; The first pulse signal of 1pps is divided by the second pulse signal of predetermined Hertz to output a third pulse signal of 50Hz, and the count value of the counter is recorded. Based on the count value of the third pulse signal in each clock cycle, the synchronization phase angle is calculated, wherein the converter in the all-power electronic power system ensures the normal operation of the system's AC equipment based on the synchronization phase angle; It also includes: connecting the 10 MHz output second pulse signal of the high-precision thermostatic crystal oscillator to the allocated clock to provide a clock signal for the operation of the all-power electronic power system; The first pulse signal of 1pps is divided by a second pulse signal of predetermined Hertz to output a third pulse signal of 50Hz, and the count value of the counter is recorded, including: When the rising edge of the first pulse signal of the 1 PPS Beidou satellite signal is detected, counting begins, and the second pulse signal of a predetermined Hertz is counted. The counting range of the counter is 1 to M / 50, where M is the predetermined Hertz. Whenever the value of the counter is 2, the counter counts for two clock cycles, and sets the WINDOW level high at the falling edge of the first clock cycle and sets the WINDOW level low at the falling edge of the second clock cycle, generating a window signal with a period of 0.02s. The rising edge of the clock within the window signal is the rising edge of the high-precision thermostatic crystal oscillator signal. The window signal and the second pulse signal are logically ANDed to achieve frequency division from the predetermined Hertz second pulse signal to the 50 Hz third pulse signal; The formula for calculating the synchronization phase angle is: In the formula, i The count value of the counter, 1≤ i ≤M / 50+1, where M is the predetermined Hertz. When the WINDOW level is low, the counter restarts counting from 1.

2. The method according to claim 1, characterized in that, The formula for calculating the electromotive force voltage vector is: In the formula, = - , For synchronization phase angle, The phase angle of the electromotive force. E m This represents the output voltage amplitude.

3. A grid-type control implementation device for a fully power electronic power system, used to implement the method of claim 1, characterized in that, include: The generation module is used to generate a unified synchronization phase angle for the entire power electronic power system using the high-precision BeiDou satellite timing function; The first building module is used to simulate the primary frequency regulation characteristics of a synchronous generator by utilizing the relationship between the frequency deviation value and the output power, and to build a virtual speed governor for the power electronic converter. The second construction module is used to construct the virtual rotor structure of the power electronic converter based on the rotor operation equation of the synchronous generator; The third construction module is used to construct a virtual excitation regulator for the power electronic converter based on the characteristic that the synchronous generator can adjust the stator winding terminal voltage by changing the magnitude of its excitation current. The output module is used to output the electromotive force phase angle and output voltage amplitude of the power electronic converter based on the virtual speed controller, the virtual rotor structure and the virtual excitation regulator; The synthesis module is used to synthesize the electromotive force voltage vector of the power electronic converter based on the electromotive force phase angle, the output voltage amplitude, and the synchronization phase angle, wherein the electromotive force voltage vector provides inertial support and voltage support capability for the grid connection requirements of the power electronic converter.

4. A computer-readable storage medium, characterized in that, The storage medium stores a computer program for performing the method described in any one of claims 1-2.

5. An electronic device, characterized in that, The electronic device includes: processor; Memory used to store the processor's executable instructions; The processor is configured to read the executable instructions from the memory and execute the instructions to implement the method described in any one of claims 1-2.

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