Method and device for suppressing high-frequency oscillation and computer program product

Abstract

The invention discloses a high-frequency oscillation suppression method and device and a computer program product, and relates to the field of electric power systems, the high-frequency oscillation suppression method is applied to the high-frequency oscillation suppression device, the high-frequency oscillation suppression device is connected with a sending-out bus of an electric power system, and the electric power system is used for conveying energy supplied by a new energy station. The new energy station is connected with a sending-out bus of a power system through a modular multilevel converter, and the method comprises the following steps: monitoring a high-frequency oscillation component in the power system to obtain a current oscillation component; target parameters of an active suppressor of the high-frequency oscillation suppression device are determined according to the current oscillation component, the target parameters are used for determining electrical parameters of the active suppressor, and the active suppressor is used for adjusting damping of the high-frequency oscillation suppression device; and adjusting the electrical parameters of the active suppressor according to the target parameters to suppress the high-frequency oscillation component. By adopting the technical scheme, the problem of how to reduce the high-frequency oscillation risk of the power system is solved.

Description

Technical Field

[0001] The present application relates to the field of power systems, and more specifically, to a method, device and computer program product for suppressing high-frequency oscillations. Background Art

[0002] MMC-HVDC (Modular Multilevel Converter-High Voltage Direct Current) is an advanced power electronics technology used to achieve high-voltage DC power transmission. This technology has the advantages of low harmonic content and high reliability, and is widely used in the fields of asynchronous interconnection between power grids and new energy grid connection. However, factors such as control link delay, voltage feedforward control, bridge arm parameters and distributed parameter characteristics of AC lines in the MMC-HVDC system will have a negative impact on the high-frequency stability of the system.

[0003] In the prior art, high-frequency oscillation suppression strategies for MMC-HVDC systems can be divided into active damping and passive damping suppression strategies. The existing passive damping suppression strategy mainly changes the system parameters by connecting a reactance parallel passive filter to achieve the purpose of suppressing high-frequency oscillations. However, the component parameters of the passive filter are fixed, and the frequency characteristics of the filter circuit cannot be changed. When the power system parameters change and the oscillation frequency shifts, the suppression effect of the passive filter will be greatly reduced, and there is even a risk of aggravating the oscillation. The existing active damping suppression strategy cannot completely eliminate the negative damping of the modular multilevel converter. When the grid impedance changes, the system may still face new high-frequency oscillation risks.

[0004] Therefore, in the related art, there is a problem of how to reduce the risk of high-frequency oscillation in the power system.

[0005] Regarding the problem of how to reduce the risk of high-frequency oscillation in power systems in related technologies, no effective solution has been proposed so far.

[0006] Therefore, it is necessary to improve the related technology to overcome the above-mentioned defects in the related technology. Summary of the invention

[0007] The embodiments of the present application provide a method, device and computer program product for suppressing high-frequency oscillations, so as to at least solve the problem in the related art of how to reduce the risk of high-frequency oscillations in a power system.

[0008] According to one aspect of an embodiment of the present application, a method for suppressing high-frequency oscillation is provided, which is applied to a device for suppressing high-frequency oscillation, wherein the device for suppressing high-frequency oscillation is connected to a transmission bus of an electric power system, and the electric power system is used to transmit energy supplied by a new energy station, and the new energy station is connected to the transmission bus of the electric power system through a modular multilevel converter, comprising: monitoring a high-frequency oscillation component in the electric power system to obtain a current oscillation component; determining target parameters of an active suppressor of the device for suppressing high-frequency oscillation according to the current oscillation component, wherein the target parameters are used to determine electrical parameters of the active suppressor, and the active suppressor is used to adjust the damping of the device for suppressing high-frequency oscillation; and adjusting the electrical parameters of the active suppressor according to the target parameters to suppress the high-frequency oscillation component.

[0009] In an exemplary embodiment, the method further includes: providing a connecting capacitor in the high-frequency oscillation suppression device to reduce the high-frequency impedance of the high-frequency oscillation suppression device and increase the damping of the high-frequency oscillation suppression device, wherein a first end of the connecting capacitor is connected to the transmission bus, and a second end of the connecting capacitor is connected to the first end of the active suppressor; and / or, providing the connecting capacitor in the high-frequency oscillation suppression device to balance the reactive power of the high-frequency oscillation suppression device.

[0010] In an exemplary embodiment, the method further includes: setting a fundamental frequency resonance circuit in the high-frequency oscillation suppression device, wherein the fundamental frequency resonance circuit includes a fundamental frequency resonance capacitor and a fundamental frequency resonance reactance, a first end of the fundamental frequency resonance capacitor is connected to the second end of the connection capacitor, a second end of the fundamental frequency resonance capacitor is connected to the first end of the fundamental frequency resonance reactance, and a second end of the fundamental frequency resonance reactance is connected to the second end of the active suppressor; reducing the fundamental frequency current passing through the active suppressor through the fundamental frequency resonance circuit to reduce the fundamental frequency active loss of the high-frequency oscillation suppression device, wherein the fundamental frequency resonance circuit is composed of the fundamental frequency resonance capacitor and the fundamental frequency resonance reactance.

[0011] In an exemplary embodiment, the target parameters include a target amplitude and a target phase of the AC current or the AC voltage, and the electrical parameters of the active suppressor are adjusted according to the target parameters to suppress the high-frequency oscillation component, including: converting a DC power supply into an AC current or an AC voltage through a power electronic converter of the active suppressor, wherein a first end of the power electronic converter is connected to a second end of the fundamental frequency resonant reactance; adjusting the amplitude and the phase of the AC current or the AC voltage through the power electronic converter to control the amplitude and the phase of the AC current or the AC voltage to meet the target parameters; and outputting an electrical quantity opposite to the current oscillation component through the active suppressor to suppress the high-frequency oscillation component.

[0012] In an exemplary embodiment, the method further includes: reducing the high-frequency noise of the active suppressor by setting a connection reactance in the active suppressor, wherein a first end of the connection reactance is connected to a second end of the connection capacitor, and a second end of the connection reactance is connected to a second end of the power electronic converter; and / or controlling the rate of change of the output current of the power electronic converter by setting the connection reactance in the active suppressor.

[0013] In an exemplary embodiment, the method further includes: driving the power electronic converter by the DC current or the DC voltage output by the auxiliary DC power supply of the power electronic converter; inverting the DC current or the DC voltage into the AC current or the AC voltage through the valve body of the power electronic converter, wherein the first end of the valve body is connected to the second end of the connecting inductor, and the second end of the valve body is connected to the second end of the fundamental frequency resonant inductor.

[0014] According to another aspect of the embodiment of the present application, a high-frequency oscillation suppression device is further provided, comprising: a connection capacitor for reducing the high-frequency impedance of the high-frequency oscillation suppression device, increasing the damping of the high-frequency oscillation suppression device, and balancing the reactive power of the high-frequency oscillation suppression device; an active suppressor for adjusting the damping of the high-frequency oscillation suppression device; and a fundamental frequency resonant circuit for reducing the fundamental frequency current passing through the active suppressor to reduce the fundamental frequency active power loss of the high-frequency oscillation suppression device. The fundamental frequency current passing through the active suppressor is reduced to reduce the fundamental frequency active power loss of the high-frequency oscillation suppression device.

[0015] According to another aspect of the embodiments of the present application, a computer-readable storage medium is provided, in which a computer program is stored, wherein the computer program is configured to execute the above-mentioned method for suppressing high-frequency oscillation when running.

[0016] According to another aspect of the embodiments of the present application, an electronic device is provided, including a memory, a processor, and a computer program stored in the memory and executable on the processor, wherein the processor executes the method for suppressing high-frequency oscillation through the computer program.

[0017] According to another aspect of the embodiments of the present application, a computer program product is provided, including a computer program, and when the computer program is executed by a processor, the steps of the method described in each embodiment of the present application are implemented.

[0018] Through the present application, the high-frequency oscillation component in the power system can be monitored to obtain the current oscillation component, and then the target parameters of the active suppressor of the high-frequency oscillation suppression device can be determined according to the current oscillation component, and the electrical parameters of the active suppressor can be adjusted according to the target parameters to change the damping of the high-frequency oscillation suppression device to achieve the purpose of suppressing the high-frequency oscillation component. This solves the problem of how to reduce the high-frequency oscillation risk of the power system in the related art and achieves the effect of reducing the high-frequency oscillation risk of the power system. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the present application and, together with the description, serve to explain the principles of the present application.

[0020] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, for ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative labor.

[0021] Figure 1 It is a hardware structure block diagram of a computer terminal of a high-frequency oscillation suppression method according to an embodiment of the present application;

[0022] Figure 2 is a flow chart of a method for suppressing high-frequency oscillation according to an embodiment of the present application;

[0023] Figure 3 is a circuit diagram of a high-frequency oscillation suppression device according to an embodiment of the present application;

[0024] Figure 4 is a circuit diagram of an active suppressor according to an embodiment of the present application;

[0025] Figure 5 It is a structural block diagram of a high-frequency oscillation suppression device according to an embodiment of the present application. DETAILED DESCRIPTION

[0026] In order to enable those skilled in the art to better understand the solution of the present application, the technical solution in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work should fall within the scope of protection of the present application.

[0027] It should be noted that the terms "first", "second", etc. in the specification and claims of the present application and the above-mentioned drawings are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequence. It should be understood that the data used in this way can be interchangeable where appropriate, so that the embodiments of the present application described herein can be implemented in an order other than those illustrated or described herein. In addition, the terms "including" and "having" and any of their variations are intended to cover non-exclusive inclusions, for example, a process, method, system, product or device comprising a series of steps or units is not necessarily limited to those steps or units clearly listed, but may include other steps or units that are not clearly listed or inherent to these processes, methods, products or devices.

[0028] The method embodiments provided in the embodiments of the present application can be executed in a computer terminal or a similar computing device. Taking running on a computer terminal as an example, Figure 1 1 is a hardware structure block diagram of a computer terminal of a high-frequency oscillation suppression method according to an embodiment of the present application. Figure 1 As shown, the computer terminal may include one or more ( Figure 1 Only one is shown in the figure) a processor 102 (the processor 102 may include but is not limited to a processing device such as a microprocessor (Central Processing Unit, MCU) or a programmable logic device (Field Programmable Gate Array, FPGA)) and a memory 104 for storing data, wherein the above-mentioned computer terminal may also include a transmission device 106 for data transmission and an input and output device 108. It can be understood by those skilled in the art that Figure 1 The structure shown is only for illustration and does not limit the structure of the above-mentioned computer terminal. Figure 1 More or fewer components as shown, or with Figure 1 Different configurations are shown.

[0029] The memory 104 can be used to store computer programs, for example, software programs and modules of application software, such as the computer program corresponding to the high-frequency oscillation suppression method in the embodiment of the present application. The processor 102 executes various functional applications and data processing by running the computer program stored in the memory 104, that is, to implement the above method. The memory 104 may include a high-speed random access memory, and may also include a non-volatile memory, such as one or more magnetic storage devices, flash memory, or other non-volatile solid-state memory.

[0030] In this embodiment, a high-frequency oscillation suppression method is provided, which is applied to a high-frequency oscillation suppression device, wherein the high-frequency oscillation suppression device is connected to a transmission bus of a power system, wherein the power system is used to transmit energy supplied by a new energy station, and the new energy station is connected to the transmission bus of the power system through a modular multilevel converter. Figure 2 is a flow chart of a method for suppressing high-frequency oscillation according to an embodiment of the present application, such as Figure 2 As shown, the process includes the following steps:

[0031] Step S202, monitoring the high-frequency oscillation component in the power system to obtain the current oscillation component;

[0032] Optionally, in the above step S202, the oscillation component in the system may be obtained by detection filtering.

[0033] Step S204, determining target parameters of an active suppressor of the high-frequency oscillation suppression device according to the current oscillation component, wherein the target parameters are used to determine electrical parameters of the active suppressor, and the active suppressor is used to adjust the damping of the high-frequency oscillation suppression device;

[0034] Optionally, in the above step S204, for example, the damping of the high-frequency oscillation suppression device is adjusted by an active suppressor to generate a current with an oscillation frequency proportional to the voltage oscillation component and injected into the power system, thereby damping the oscillation of the wind farm.

[0035] Step S206: adjusting the electrical parameters of the active suppressor according to the target parameters to suppress the high-frequency oscillation component.

[0036] Through the above steps, the high-frequency oscillation component in the power system can be monitored to obtain the current oscillation component, and then the target parameters of the active suppressor of the high-frequency oscillation suppression device can be determined according to the current oscillation component, and the electrical parameters of the active suppressor can be adjusted according to the target parameters to change the damping of the high-frequency oscillation suppression device to achieve the purpose of suppressing the high-frequency oscillation component. This solves the problem of how to reduce the high-frequency oscillation risk of the power system in the related art and achieves the effect of reducing the high-frequency oscillation risk of the power system.

[0037] In an optional embodiment, the circuit connection relationship between the high-frequency oscillation suppression device, the new energy station and the power system is as follows: Figure 3 As shown, the new energy station is connected to the transmission bus of the power system through a modular multilevel converter. New energy stations such as wind farms and photovoltaic power stations provide clean and sustainable energy supply for the power system by converting renewable energy such as wind energy and solar energy into electrical energy.

[0038] MMC-HVDC is an advanced high-voltage direct current transmission technology that uses modular multilevel converters (MMC) as core equipment and has the advantages of low harmonic content and high reliability. MMC-HVDC can effectively transmit the electricity generated by new energy stations to distant load centers. Through MMC-HVDC technology, efficient and stable energy exchange between new energy stations and power systems can be achieved.

[0039] In an exemplary embodiment, the method further includes: providing a connecting capacitor in the high-frequency oscillation suppression device to reduce the high-frequency impedance of the high-frequency oscillation suppression device and increase the damping of the high-frequency oscillation suppression device, wherein a first end of the connecting capacitor is connected to the transmission bus, and a second end of the connecting capacitor is connected to the first end of the active suppressor; and / or, providing the connecting capacitor in the high-frequency oscillation suppression device to balance the reactive power of the high-frequency oscillation suppression device.

[0040] In an exemplary embodiment, the method further includes: setting a fundamental frequency resonance circuit in the high-frequency oscillation suppression device, wherein the fundamental frequency resonance circuit includes a fundamental frequency resonance capacitor and a fundamental frequency resonance reactance, a first end of the fundamental frequency resonance capacitor is connected to the second end of the connection capacitor, a second end of the fundamental frequency resonance capacitor is connected to the first end of the fundamental frequency resonance reactance, and a second end of the fundamental frequency resonance reactance is connected to the second end of the active suppressor; reducing the fundamental frequency current passing through the active suppressor through the fundamental frequency resonance circuit to reduce the fundamental frequency active loss of the high-frequency oscillation suppression device, wherein the fundamental frequency resonance circuit is composed of the fundamental frequency resonance capacitor and the fundamental frequency resonance reactance.

[0041] In an optional embodiment, if Figure 3 As shown, C Z Equivalent to the above connection capacitance, C d Equivalent to the fundamental frequency resonant capacitor, L d Equivalent to the above fundamental frequency resonant reactance, fundamental frequency resonant capacitor C d and fundamental frequency resonant reactance L d Form a fundamental frequency resonant circuit and connect capacitor C ZOne end is connected to the output bus of the power system. The other end is connected to the active suppressor and the fundamental frequency resonant capacitor C d Connect the active suppressor to the fundamental frequency resonant reactance L d connect.

[0042] Among them, the connected capacitor C Z Mainly related to reactive power compensation, C Z Increasing the impedance of the high frequency band of the suppression device will reduce the high frequency oscillation, so that more current in this frequency band flows into the suppression device, thereby increasing the positive damping of the suppression device, but C Z Too large a value will also lead to greater reactive power compensation. In the fundamental frequency resonant circuit, the fundamental frequency resonant reactance L d The increase in L will cause more current to flow through the active suppressor, increasing the positive damping provided by the active suppressor, but as L d As the value increases, its influence gradually weakens. Therefore, it is necessary to adjust the active suppressor so that the positive damping provided by the high-frequency oscillation suppression device can completely offset the negative damping of the MMC to ensure the stable operation of the power system.

[0043] In an exemplary embodiment, the target parameters include a target amplitude and a target phase of the AC current or the AC voltage, and the electrical parameters of the active suppressor are adjusted according to the target parameters to suppress the high-frequency oscillation component, including: converting a DC power supply into an AC current or an AC voltage through a power electronic converter of the active suppressor, wherein a first end of the power electronic converter is connected to a second end of the fundamental frequency resonant reactance; adjusting the amplitude and the phase of the AC current or the AC voltage through the power electronic converter to control the amplitude and the phase of the AC current or the AC voltage to meet the target parameters; and outputting an electrical quantity opposite to the current oscillation component through the active suppressor to suppress the high-frequency oscillation component.

[0044] In an exemplary embodiment, the method further includes: reducing the high-frequency noise of the active suppressor by setting a connection reactance in the active suppressor, wherein a first end of the connection reactance is connected to a second end of the connection capacitor, and a second end of the connection reactance is connected to a second end of the power electronic converter; and / or controlling the rate of change of the output current of the power electronic converter by setting the connection reactance in the active suppressor.

[0045] In an optional embodiment, if Figure 3 As shown, the active suppressor consists of connecting the reactance L APF and power electronic converter, connected to the reactance L APF Connect to power electronic converter and connect reactance L APF The other end is connected to capacitor C ZThe other end of the power electronic converter is connected to the fundamental frequency resonant reactance L d connect.

[0046] Among them, the power electronic converter is responsible for converting the DC power supply into an AC current or voltage, which can be in phase or anti-phase with the oscillating component in the system to achieve oscillation cancellation or suppression. The power electronic converter can also respond quickly to changes in the system and dynamically adjust its output to adapt to different oscillation conditions and system requirements. The connected reactance limits the rate of change of the output current of the power electronic converter, protecting the converter from damage caused by sudden current changes. It also helps to reduce high-frequency noise and unnecessary harmonics, and improve the electromagnetic compatibility of the system.

[0047] In practical applications, the combination of power electronic converters and connected reactances can achieve effective suppression of high-frequency oscillations in power systems. The power electronic converter provides the necessary dynamic response and control capabilities, while the connected reactance ensures the stability and safety of the system. The design of this active suppressor enables it to adapt to the changing conditions in the power system, providing flexible and effective oscillation control.

[0048] In an exemplary embodiment, the method further includes: driving the power electronic converter by the DC current or the DC voltage output by the auxiliary DC power supply of the power electronic converter; inverting the DC current or the DC voltage into the AC current or the AC voltage through the valve body of the power electronic converter, wherein the first end of the valve body is connected to the second end of the connecting inductor, and the second end of the valve body is connected to the second end of the fundamental frequency resonant inductor.

[0049] In an optional embodiment, if Figure 4 As shown, the power electronic converter includes an auxiliary DC power supply and a valve body, wherein the auxiliary DC power supply provides a stable DC voltage or current as the energy input of the power electronic converter, and the valve body refers to a power switching device in the power electronic converter, such as a thyristor, an insulated gate bipolar transistor, a metal oxide semiconductor field effect transistor, etc., which is responsible for controlling the on and off of the current, thereby converting the electric energy of the DC power supply into the required AC electric energy form. For example, in this embodiment, the DC power can be inverted and output into a high-frequency suppression current through the valve body, and finally connected to the capacitor C Z injected into the power system.

[0050] Through the above embodiments, a strategy combining active suppression and passive suppression can be adopted, with the passive filter bearing high voltage and the active filter bearing low voltage, so as to reduce the cost and realize automatic tracking and suppression of the oscillation frequency.

[0051] Through the description of the above implementation methods, those skilled in the art can clearly understand that the method according to the above embodiment can be implemented by means of software plus a necessary general hardware platform, and of course by hardware, but in many cases the former is a better implementation method. Based on such an understanding, the technical solution of the present application, or the part that contributes to the prior art, can be embodied in the form of a software product, which is stored in a storage medium (such as ROM / RAM, magnetic disk, optical disk), and includes a number of instructions for a terminal device (which can be a mobile phone, computer, server, or network device, etc.) to execute the methods of each embodiment of the present application.

[0052] In this embodiment, a high-frequency oscillation suppression device is also provided, which is used to implement the above-mentioned embodiments and preferred embodiments, and the descriptions that have been made will not be repeated. As used below, the term "module" can implement a combination of software and / or hardware of a predetermined function. Although the devices described in the following embodiments are preferably implemented in software, the implementation of hardware, or a combination of software and hardware, is also possible and conceivable.

[0053] Figure 5 : is a structural block diagram of a high-frequency oscillation suppression device according to an embodiment of the present application, the device comprising:

[0054] A connecting capacitor 52 is used to reduce the high-frequency impedance of the high-frequency oscillation suppression device, increase the damping of the high-frequency oscillation suppression device, and balance the reactive power of the high-frequency oscillation suppression device;

[0055] an active suppressor 54 for adjusting the damping of the suppressing device for the high frequency oscillation;

[0056] The fundamental frequency resonant circuit 56 is used to reduce the fundamental frequency current passing through the active suppressor to reduce the fundamental frequency active power loss of the high frequency oscillation suppression device. The fundamental frequency current passing through the active suppressor to reduce the fundamental frequency active power loss of the high frequency oscillation suppression device.

[0057] Through the above device, the high-frequency oscillation component in the power system can be monitored to obtain the current oscillation component, and then the target parameters of the active suppressor of the high-frequency oscillation suppression device can be determined according to the current oscillation component, and the electrical parameters of the active suppressor can be adjusted according to the target parameters to change the damping of the high-frequency oscillation suppression device to achieve the purpose of suppressing the high-frequency oscillation component. This solves the problem of how to reduce the high-frequency oscillation risk of the power system in the related art and achieves the effect of reducing the high-frequency oscillation risk of the power system.

[0058] In an exemplary embodiment, the device is also used to: reduce the high-frequency impedance of the high-frequency oscillation suppression device and increase the damping of the high-frequency oscillation suppression device by arranging a connecting capacitor in the high-frequency oscillation suppression device, wherein the first end of the connecting capacitor is connected to the transmission bus, and the second end of the connecting capacitor is connected to the first end of the active suppressor; and / or, balance the reactive power of the high-frequency oscillation suppression device by arranging the connecting capacitor in the high-frequency oscillation suppression device.

[0059] In an exemplary embodiment, the device is also used to: set a fundamental frequency resonance circuit in the high-frequency oscillation suppression device, wherein the fundamental frequency resonance circuit includes a fundamental frequency resonance capacitor and a fundamental frequency resonance reactance, a first end of the fundamental frequency resonance capacitor is connected to the second end of the connection capacitor, a second end of the fundamental frequency resonance capacitor is connected to the first end of the fundamental frequency resonance reactance, and a second end of the fundamental frequency resonance reactance is connected to the second end of the active suppressor; reduce the fundamental frequency current passing through the active suppressor through the fundamental frequency resonance circuit to reduce the fundamental frequency active loss of the high-frequency oscillation suppression device, wherein the fundamental frequency resonance circuit is composed of the fundamental frequency resonance capacitor and the fundamental frequency resonance reactance.

[0060] In an exemplary embodiment, the target parameters include a target amplitude and a target phase of the AC current or the AC voltage, and the device is further used to: convert a DC power supply into an AC current or an AC voltage through a power electronic converter of the active suppressor, wherein a first end of the power electronic converter is connected to a second end of the fundamental frequency resonant reactance; adjust the amplitude and the phase of the AC current or the AC voltage through the power electronic converter to control the amplitude and the phase of the AC current or the AC voltage to meet the target parameters; and output an electrical quantity opposite to the current oscillation component through the active suppressor to suppress the high-frequency oscillation component.

[0061] In an exemplary embodiment, the device is also used to: reduce the high-frequency noise of the active suppressor by setting a connection reactance in the active suppressor, wherein a first end of the connection reactance is connected to a second end of the connection capacitor, and a second end of the connection reactance is connected to a second end of the power electronic converter; and / or control the rate of change of the output current of the power electronic converter by setting the connection reactance in the active suppressor.

[0062] In an exemplary embodiment, the device is also used to: drive the power electronic converter by the DC current or the DC voltage output by the auxiliary DC power supply of the power electronic converter; invert the DC current or the DC voltage into the AC current or the AC voltage through the valve body of the power electronic converter, wherein the first end of the valve body is connected to the second end of the connecting inductor, and the second end of the valve body is connected to the second end of the fundamental frequency resonant inductor.

[0063] An embodiment of the present application further provides a computer-readable storage medium, in which a computer program is stored, wherein the computer program is configured to execute the steps of any of the above method embodiments when running.

[0064] Optionally, in this embodiment, the storage medium may be configured to store a computer program for performing the following steps:

[0065] S1, monitoring the high-frequency oscillation component in the power system to obtain the current oscillation component;

[0066] S2, determining target parameters of an active suppressor of the high-frequency oscillation suppression device according to the current oscillation component, wherein the target parameters are used to determine electrical parameters of the active suppressor, and the active suppressor is used to adjust the damping of the high-frequency oscillation suppression device;

[0067] S3, adjusting the electrical parameters of the active suppressor according to the target parameters to suppress the high-frequency oscillation component.

[0068] In an exemplary embodiment, the computer-readable storage medium may include, but is not limited to, various media that can store computer programs, such as a USB flash drive, a read-only memory (ROM), a random access memory (RAM), a mobile hard disk, a magnetic disk or an optical disk.

[0069] For specific examples in this embodiment, reference may be made to the examples described in the above embodiments and exemplary implementation modes, and this embodiment will not be described in detail herein.

[0070] An embodiment of the present application further provides an electronic device, including a memory and a processor, wherein a computer program is stored in the memory, and the processor is configured to run the computer program to execute the steps in any one of the above method embodiments.

[0071] Optionally, in this embodiment, the processor may be configured to perform the following steps through a computer program:

[0072] S1, monitoring the high-frequency oscillation component in the power system to obtain the current oscillation component;

[0073] S2, determining target parameters of an active suppressor of the high-frequency oscillation suppression device according to the current oscillation component, wherein the target parameters are used to determine electrical parameters of the active suppressor, and the active suppressor is used to adjust the damping of the high-frequency oscillation suppression device;

[0074] S3, adjusting the electrical parameters of the active suppressor according to the target parameters to suppress the high-frequency oscillation component.

[0075] An embodiment of the present application further provides a computer program product, comprising a non-volatile computer-readable storage medium, wherein the non-volatile computer-readable storage medium stores a computer program product, and when the computer program is executed by a processor, the steps of the method described in each embodiment of the present application are implemented.

[0076] Optionally, in this embodiment, the above computer program may be configured to implement the following steps when executed by a processor:

[0077] S1, monitoring the high-frequency oscillation component in the power system to obtain the current oscillation component;

[0078] S2, determining target parameters of an active suppressor of the high-frequency oscillation suppression device according to the current oscillation component, wherein the target parameters are used to determine electrical parameters of the active suppressor, and the active suppressor is used to adjust the damping of the high-frequency oscillation suppression device;

[0079] S3, adjusting the electrical parameters of the active suppressor according to the target parameters to suppress the high-frequency oscillation component.

[0080] For specific examples in this embodiment, reference may be made to the examples described in the above embodiments and exemplary implementation modes, and this embodiment will not be described in detail herein.

[0081] Obviously, those skilled in the art should understand that the above modules or steps of the present application can be implemented by a general computing device, they can be concentrated on a single computing device, or distributed on a network composed of multiple computing devices, they can be implemented by a program code executable by a computing device, so that they can be stored in a storage device and executed by the computing device, and in some cases, the steps shown or described can be executed in a different order from that herein, or they can be made into individual integrated circuit modules, or multiple modules or steps therein can be made into a single integrated circuit module for implementation. Thus, the present application is not limited to any specific combination of hardware and software.

[0082] The above is only a preferred implementation of the present application. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the principles of the present application. These improvements and modifications should also be regarded as the scope of protection of the present application.

Claims

1. A method for suppressing high frequency oscillation, characterized in that: A device for suppressing high-frequency oscillations, the device for suppressing high-frequency oscillations being connected to a transmission bus of a power system, the power system being used to transmit energy supplied by a new energy station, the new energy station being connected to the transmission bus of the power system through a modular multilevel converter, comprising: Monitoring the high-frequency oscillation component in the power system to obtain the current oscillation component; Determining target parameters of an active suppressor of the high-frequency oscillation suppression device according to the current oscillation component, wherein the target parameters are used to determine electrical parameters of the active suppressor, and the active suppressor is used to adjust the damping of the high-frequency oscillation suppression device; The electrical parameters of the active suppressor are adjusted according to the target parameters to suppress the high-frequency oscillation component.

2. The method according to claim 1, characterized in that The method further comprises: By arranging a connection capacitor in the high-frequency oscillation suppression device, the high-frequency impedance of the high-frequency oscillation suppression device is reduced and the damping of the high-frequency oscillation suppression device is increased, wherein the first end of the connection capacitor is connected to the transmission bus, and the second end of the connection capacitor is connected to the first end of the active suppressor; And / or, by providing the connection capacitor in the high-frequency oscillation suppression device, the reactive power of the high-frequency oscillation suppression device is balanced.

3. The method according to claim 2, characterized in that The method further comprises: A fundamental frequency resonance circuit is arranged in the high frequency oscillation suppression device, wherein the fundamental frequency resonance circuit comprises a fundamental frequency resonance capacitor and a fundamental frequency resonance reactance, a first end of the fundamental frequency resonance capacitor is connected to a second end of the connection capacitor, a second end of the fundamental frequency resonance capacitor is connected to a first end of the fundamental frequency resonance reactance, and a second end of the fundamental frequency resonance reactance is connected to a second end of the active suppressor; The fundamental frequency current passing through the active suppressor is reduced by the fundamental frequency resonant circuit to reduce the fundamental frequency active power loss of the high frequency oscillation suppression device, wherein the fundamental frequency resonant circuit is composed of the fundamental frequency resonant capacitor and the fundamental frequency resonant reactance.

4. The method according to claim 3, characterized in that: The target parameters include a target amplitude and a target phase of an AC current or an AC voltage, and the electrical parameters of the active suppressor are adjusted according to the target parameters to suppress the high-frequency oscillation component, including: Converting a DC power source into an AC current or an AC voltage by means of a power electronic converter of the active suppressor, wherein a first end of the power electronic converter is connected to a second end of the fundamental frequency resonant reactance; adjusting the amplitude and phase of the AC current or the AC voltage by the power electronic converter to control the amplitude and phase of the AC current or the AC voltage to meet the target parameters; The active suppressor outputs an electrical quantity opposite to the current oscillation component to suppress the high-frequency oscillation component.

5. The method according to claim 4, characterized in that The method further comprises: By setting a connection reactance in the active suppressor, the high-frequency noise of the active suppressor is reduced, wherein the first end of the connection reactance is connected to the second end of the connection capacitor, and the second end of the connection reactance is connected to the second end of the power electronic converter; And / or, the connection reactance is set in the active suppressor to control the rate of change of the output current of the power electronic converter.

6. The method according to claim 5, characterized in that The method further comprises: The power electronic converter is driven by the DC current or the DC voltage output by the auxiliary DC power supply of the power electronic converter; The DC current or the DC voltage is inverted and output as the AC current or the AC voltage through the valve body of the power electronic converter, wherein the first end of the valve body is connected to the second end of the connecting inductor, and the second end of the valve body is connected to the second end of the fundamental frequency resonant inductor.

7. A high frequency oscillation suppression device, characterized in that: include: A connecting capacitor is used to reduce the high-frequency impedance of the high-frequency oscillation suppression device, increase the damping of the high-frequency oscillation suppression device, and balance the reactive power of the high-frequency oscillation suppression device; an active suppressor for adjusting the damping of the suppressing device for the high frequency oscillations; The fundamental frequency resonant circuit is used to reduce the fundamental frequency current passing through the active suppressor to reduce the fundamental frequency active power loss of the high frequency oscillation suppression device. The fundamental frequency current passing through the active suppressor is reduced to reduce the fundamental frequency active power loss of the high frequency oscillation suppression device.

8. A computer-readable storage medium, characterized in that: The computer-readable storage medium includes a stored program, wherein the program executes the method according to any one of claims 1 to 6 when executed.

9. An electronic device comprising a memory and a processor, characterized in that: A computer program is stored in the memory, and the processor is configured to execute the method according to any one of claims 1 to 6 through the computer program.

10. A computer program product, comprising a computer program, characterized in that When the computer program is executed by a processor, the steps of the method according to any one of claims 1 to 6 are implemented.

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