A method and system for identifying broadband oscillation modes in power systems

Abstract

The present invention discloses a method and system for identifying broadband oscillation modes of power systems, and belongs to the technical field of power system simulation and analysis. The method of the present invention comprises: determining the sensitivity of different oscillation modes of the power system to be analyzed relative to different control parameters; screening out the sensitivity that meets the requirements, and determining whether the control parameter corresponding to the sensitivity that meets the requirements is related to the power supply; if so, determining the position and function of the control parameter corresponding to the sensitivity that meets the requirements in the power supply control or circuit to identify the broadband oscillation mode of the power system to be analyzed; if not, determining the position and function of the control parameter corresponding to the sensitivity that meets the requirements in the power grid topology of the power system to be analyzed to identify the broadband oscillation mode of the power system to be analyzed. The present invention can realize the analysis of the influence of different control parameters on different oscillation modes.

Description

Technical Field

[0001] The present invention relates to the technical field of power system simulation and analysis, and more particularly, to a method and system for identifying broadband oscillation modes in a power system. Background Art

[0002] To accelerate the implementation of the "carbon peak and carbon neutrality" goals, my country has rapidly expanded its renewable energy power generation in recent years. With the rapid integration of renewable energy sources into the grid, the stability issues faced by converter-based power sources, such as wind and photovoltaic power generation, are different from those faced by traditional synchronous generator-based systems. Connecting a large number of renewable energy sources to weak systems can lead to various oscillation issues.

[0003] Actual projects have shown that with the integration of a high proportion of converter power sources, traditional grid stability issues have become increasingly prominent, and new stability issues have also emerged, becoming the main constraint on the large-scale transmission of renewable energy. From an operational perspective, multiple broadband oscillation incidents have occurred due to the integration of renewable energy.

[0004] From the perspective of accident analysis, when broadband oscillation occurs in a system, the root cause of the oscillation is often traced back to the new energy generators or system parameters according to the frequency band in which the oscillation occurs. However, most current analysis methods rely on existing analysis results and engineering experience to determine which generators and parameters are responsible for the oscillation modes in different frequency bands, lacking a clear mechanistic explanation.

[0005] In the field of matrix analysis, extensive research has been conducted on the sensitivity of eigenvalues ​​to parameters. This calculation allows for the convenient quantitative calculation of the impact of varying parameter changes on a particular oscillation mode. In the field of electromechanical transient analysis, analysis of the relevant influencing parameters of oscillation modes has been achieved. However, due to the inherent limitations of electromechanical transient analysis methods, they can only analyze low-frequency oscillations caused by generator rotors and cannot analyze broadband oscillations caused by the widespread integration of renewable energy sources.

[0006] With the widespread integration of renewable energy sources and the wide range of control parameter values, broadband oscillations may also change. For example, low-frequency oscillations generally range from 0.1 to 2.5 Hz, primarily manifesting as power exchange between multiple generators. This is primarily caused by the relative oscillation of the synchronous generator rotors, which is strongly correlated with the rotor time constant, damping coefficient, and electrical distance. However, with the integration of grid-connected converters with virtual synchronous control, the oscillation frequency of power exchange caused by relative rotor oscillation may exceed the traditional 0.1 to 2.5 Hz range, as the adjustable range of their control parameters is much greater than the synchronous generator rotor time constant. Due to the extremely small time constant of grid-connected converters with virtual synchronous control, the oscillation frequency may fall within the subsynchronous oscillation region. In this case, relying on engineering experience and applying traditional measures to mitigate subsynchronous oscillations (such as adjusting phase-locked loop parameters) is unlikely to be effective. Summary of the Invention

[0007] To address the above problems, the present invention proposes a method for identifying broadband oscillation modes in a power system, comprising:

[0008] Determine the sensitivity of different oscillation modes of the power system to be analyzed with respect to different control parameters;

[0009] Screening out sensitivities that meet the requirements, and determining whether the control parameters corresponding to the sensitivities that meet the requirements are related to the power supply;

[0010] If so, determine the control parameter corresponding to the sensitivity that meets the requirements, the position and function of the control parameter in the power control or circuit, so as to identify the broadband oscillation mode of the power system to be analyzed;

[0011] If not, the control parameter corresponding to the sensitivity meeting the requirement is determined, and its position and function in the grid topology of the power system to be analyzed are determined to identify the broadband oscillation mode of the power system to be analyzed.

[0012] Optionally, before determining the sensitivities of different oscillation modes of the power system to be analyzed with respect to different control parameters, the method further includes:

[0013] Obtain the Jacobian matrix after electromagnetic transient modeling of the power system to be analyzed and the eigenvalues / eigenvectors of the Jacobian matrix, determine the oscillation mode to be analyzed and the control parameters to be analyzed based on the Jacobian matrix and the eigenvalues / eigenvectors of the Jacobian matrix, and use the oscillation mode to be analyzed and the control parameters to be analyzed as different oscillation modes and different control parameters, respectively.

[0014] Optionally, select the sensitivity that meets the requirements, including:

[0015] The 2-norms of the sensitivities of different oscillation modes of the power system to be analyzed relative to different control parameters are determined, and the sensitivities with 2-norms less than a preset threshold are screened out.

[0016] Optionally, determining the control parameter corresponding to the required sensitivity, the location and function thereof in the power supply control or circuit, so as to identify the broadband oscillation mode of the power system to be analyzed, includes:

[0017] Determine the control parameters corresponding to the required sensitivity, the bus number and power type where the power supply is located, and based on the bus number and power type, determine the control parameters corresponding to the required sensitivity, the position and function in the power supply control or circuit to identify the broadband oscillation mode of the power system to be analyzed.

[0018] In another aspect, the present invention further provides a system for identifying broadband oscillation modes in a power system, comprising:

[0019] An initialization unit for determining the sensitivity of different oscillation modes of the power system to be analyzed with respect to different control parameters;

[0020] A screening unit, configured to screen out sensitivities that meet the requirements, and determine whether the control parameters corresponding to the sensitivities that meet the requirements are related to the power supply;

[0021] an output unit, configured to determine, when the control parameter corresponding to the required sensitivity is related to the power supply, a location and function of the control parameter corresponding to the required sensitivity in the power supply control or circuit, so as to identify a broadband oscillation mode of the power system to be analyzed;

[0022] Used to determine the position and function of the control parameters corresponding to the required sensitivity in the power grid topology of the power system to be analyzed when the control parameters corresponding to the required sensitivity are not related to the power supply, so as to identify the broadband oscillation mode of the power system to be analyzed.

[0023] Optionally, before determining the sensitivities of different oscillation modes of the power system to be analyzed with respect to different control parameters, the method further includes:

[0024] Obtain the Jacobian matrix after electromagnetic transient modeling of the power system to be analyzed and the eigenvalues / eigenvectors of the Jacobian matrix, determine the oscillation mode to be analyzed and the control parameters to be analyzed based on the Jacobian matrix and the eigenvalues / eigenvectors of the Jacobian matrix, and use the oscillation mode to be analyzed and the control parameters to be analyzed as different oscillation modes and different control parameters, respectively.

[0025] Optionally, select the sensitivity that meets the requirements, including:

[0026] The 2-norms of the sensitivities of different oscillation modes of the power system to be analyzed relative to different control parameters are determined, and the sensitivities with 2-norms less than a preset threshold are screened out.

[0027] Optionally, determining the control parameter corresponding to the required sensitivity, the location and function thereof in the power supply control or circuit, so as to identify the broadband oscillation mode of the power system to be analyzed, includes:

[0028] Determine the control parameters corresponding to the required sensitivity, the bus number and power type where the power supply is located, and based on the bus number and power type, determine the control parameters corresponding to the required sensitivity, the position and function in the power supply control or circuit to identify the broadband oscillation mode of the power system to be analyzed.

[0029] In yet another aspect, the present invention further provides a computing device comprising: one or more processors;

[0030] a processor for executing one or more programs;

[0031] When the one or more programs are executed by the one or more processors, the above-described method is implemented.

[0032] In another aspect, the present invention further provides a computer-readable storage medium having a computer program stored thereon, wherein when the computer program is executed, the method described above is implemented.

[0033] Compared with the prior art, the present invention has the following beneficial effects:

[0034] The present invention provides a method for identifying broadband oscillation modes of an electric power system, comprising: determining the sensitivity of different oscillation modes of an electric power system to be analyzed relative to different control parameters; screening out sensitivities that meet the requirements, and determining whether the control parameters corresponding to the sensitivities that meet the requirements are related to the power supply; if so, determining the position and function of the control parameters corresponding to the sensitivities that meet the requirements in the power supply control or circuit to identify the broadband oscillation modes of the electric power system to be analyzed; if not, determining the position and function of the control parameters corresponding to the sensitivities that meet the requirements in the power grid topology of the electric power system to be analyzed to identify the broadband oscillation modes of the electric power system to be analyzed. The present invention can analyze the influence of different control parameters on different oscillation modes, further obtain the dominant parameters of different oscillation modes, and identify the oscillation properties and related factors of different modes, thereby proposing relevant analysis methods for solving broadband oscillation problems in various frequency bands. BRIEF DESCRIPTION OF THE DRAWINGS

[0035] Figure 1 is a flow chart of the method of the present invention;

[0036] Figure 2 Schematic diagram of a process example of the present invention;

[0037] Figure 3 A structural diagram of a system in an example of the method of the present invention;

[0038] Figure 4 This is a schematic diagram of the change in active power of each power supply after disturbance in an embodiment of the method of the present invention;

[0039] Figure 5 It is a structural diagram of the system of the present invention. DETAILED DESCRIPTION

[0040] Exemplary embodiments of the present invention will now be described with reference to the accompanying drawings. However, the present invention may be embodied in many different forms and is not limited to the embodiments described herein. These embodiments are provided to provide a thorough and complete disclosure of the present invention and to fully convey the scope of the present invention to those skilled in the art. The terminology used in the exemplary embodiments shown in the accompanying drawings is not intended to limit the present invention. In the accompanying drawings, identical elements are denoted by the same reference numerals.

[0041] Unless otherwise specified, the terms used herein (including technical terms) have the meanings commonly understood by those skilled in the art. In addition, it is understood that terms defined in commonly used dictionaries should be understood to have the same meanings as those in the context of the relevant fields, and should not be understood as idealized or overly formal meanings.

[0042] Example 1:

[0043] The present invention proposes a method for identifying broadband oscillation modes in power systems, such as Figure 1 As shown, including:

[0044] Step 1: Determine the sensitivity of different oscillation modes of the power system to be analyzed relative to different control parameters;

[0045] Step 2: Screen out the sensitivities that meet the requirements and determine whether the control parameters corresponding to the sensitivities that meet the requirements are related to the power supply;

[0046] Step 3: If yes, determine the control parameter corresponding to the sensitivity that meets the requirements, and its location and function in the power control or circuit to identify the broadband oscillation mode of the power system to be analyzed;

[0047] Step 4: If not, determine the control parameters corresponding to the sensitivity that meets the requirements, and their position and function in the power grid topology of the power system to be analyzed, so as to identify the broadband oscillation mode of the power system to be analyzed.

[0048] Before determining the sensitivities of different oscillation modes of the power system to be analyzed relative to different control parameters, the method further includes:

[0049] Obtain the Jacobian matrix after electromagnetic transient modeling of the power system to be analyzed and the eigenvalues / eigenvectors of the Jacobian matrix, determine the oscillation mode to be analyzed and the control parameters to be analyzed based on the Jacobian matrix and the eigenvalues / eigenvectors of the Jacobian matrix, and use the oscillation mode to be analyzed and the control parameters to be analyzed as different oscillation modes and different control parameters, respectively.

[0050] Among them, the sensitivity that meets the requirements is screened out, including:

[0051] The 2-norms of the sensitivities of different oscillation modes of the power system to be analyzed relative to different control parameters are determined, and the sensitivities with 2-norms less than a preset threshold are screened out.

[0052] Determining the control parameters corresponding to the required sensitivity, their location and function in the power supply control or circuit, and identifying the broadband oscillation mode of the power system to be analyzed, includes:

[0053] Determine the control parameters corresponding to the required sensitivity, the bus number and power type where the power supply is located, and based on the bus number and power type, determine the control parameters corresponding to the required sensitivity, the position and function in the power supply control or circuit to identify the broadband oscillation mode of the power system to be analyzed.

[0054] The present invention will be further described below in conjunction with embodiments:

[0055] The principle of the example steps is as follows Figure 2 As shown, the specific steps include:

[0056] Step 1: Obtain the Jacobian matrix, eigenvalues, and eigenvectors after electromagnetic transient modeling of the system to be analyzed;

[0057] Step 2: Determine the oscillation modes to be analyzed and the related control parameters to be analyzed, and calculate the sensitivity of different modes to different parameters;

[0058] Step 3: Determine whether the 2-norm of the sensitivity results of different modes relative to different parameters is less than the threshold.

[0059] Step 3.1: If yes, keep the parameter sensitivity;

[0060] Step 3.2: If not, discard the sensitivity of the parameter;

[0061] Step 4: Analyze the sensitivity results of different modes with respect to different parameters after data screening to determine whether each parameter is related to the power supply (synchronous machine, converter);

[0062] Step 5: If the sensitivity result is related to the power supply, locate the bus number and power supply type of the power supply corresponding to the sensitivity parameter;

[0063] Step 6: Following Step 5, analyze the location and function of the parameter in the power control or circuit.

[0064] Step 7: Following Step 4, if the sensitivity result is not related to the power supply, locate the position and role of the physical model corresponding to this parameter in the power grid topology;

[0065] Step 8: Output analysis results.

[0066] by Figure 3 Taking the system shown as an example, after achieving electromagnetic transient scale state space modeling of the entire system and obtaining the eigenvalues, the method proposed in the present invention can be applied to further analyze the specific influencing factors of the vibration modes of various physical quantities in the frequency domain after the system is disturbed.

[0067] Figure 3 In the system shown in the figure, 30#~32# and 37#~38# are grid-type converters using virtual synchronous control. The virtual inertia time constant T in the virtual synchronous control is J =0.002[s]; 33#~36# are grid-following converters; 39# is a synchronous unit, with an inertia time constant T J =10[s]. Apply disturbance to bus 16# and observe the change of active power of each power source, such as Figure 4 shown.

[0068] from Figure 4 The time-domain simulation waveforms shown clearly show that the system primarily experiences oscillations at three modes: 17.24Hz, 12.56Hz, and 1.03Hz. Applying the proposed analysis method, we first calculated the sensitivity of key parameters for the three modes observed in the time-domain simulation. The sensitivity analysis results then determined which unit was responsible for each of the three oscillation modes.

[0069] The sensitivity results are shown in Table 1 below.

[0070] Table 1

[0071]

[0072] After eliminating the results with a 2-norm less than a threshold (1e-4), the information of the three modes is represented by different colors, and the specific elements with larger 2-norm results in the parameter sensitivity are highlighted.

[0073] For the time domain simulation, an oscillation mode of 17.24 Hz is obtained. The theoretical result of the frequency domain analysis is a damping ratio of 0.0447 and an oscillation frequency of 16.8967 Hz, which is consistent with the parameters: T f33 , L C33 、T f34 , L C34 、T f35 , L C35 、T f36 , L C36 Strong correlation, little correlation with other control parameters. Figure 1 From the system topology shown in the figure, it can be seen that the control parameters strongly correlated with this mode are related to the grid-following converter. Based on engineering experience, it can be determined that this mode is a subsynchronous oscillation caused by the grid-following converter.

[0074] The oscillation mode of 1.03 Hz is obtained from the time domain simulation. The theoretical result of the frequency domain analysis is a damping ratio of 0.1318 and an oscillation frequency of 1.0427 Hz, which is consistent with the parameters: T J30 、T J31 、T J32 、T J37 、T J38 、D 39 、T J39 , L 3939 Strong correlation, little correlation with other control parameters. Figure 1 The system topology shown in Figure 1 shows that this mode is related to the rotor time constants of the grid-type converters and synchronous generators. It is also strongly correlated with the synchronous generator damping and the inductance of the synchronous generator's step-up transformer. Combining engineering experience with the oscillation frequency, it can be determined that this mode is a low-frequency oscillation caused by inertia and virtual inertia power sources, exhibiting the characteristics of power interaction.

[0075] For the time domain simulation, an oscillation mode of 12.56 Hz is obtained. The theoretical result of the frequency domain analysis is a damping ratio of 0.1063 and an oscillation frequency of 12.4011 Hz, which is consistent with the parameter: D 30 、T J30 、D 31 、T J31 、D 32 、T J32 、D 37 、T J37 、D 38 、T J38 , L 0205 , L 3002 Strong correlation, little correlation with other control parameters. Figure 1The system topology shown in the figure shows that the control parameters and electrical parameters of this mode are strongly correlated with the virtual synchronization control parameters of the grid-type converter and the external transmission lines and transformer inductance of some units. Considering the virtual time constant T of the grid-type converter J Combined with engineering experience, it can be considered that this mode is caused by the oscillation of the virtual rotor equation of the grid-type converter due to the time constant being too small. J It can be 1 to 16 [s], so the oscillation frequency that usually occurs is 0.1 to 2.5 Hz, which is a low-frequency oscillation. J The frequency is so low that the power oscillation frequency, originally occurring in the low-frequency oscillation band due to the rotor equation, enters the subsynchronous oscillation band. Without the analysis method proposed in this article, actual engineering experience would lead to the conclusion that this oscillation mode is similar to 17.24Hz and is caused by the grid-following converter, leading to an incorrect conclusion.

[0076] This embodiment and the specific calculation results verify the advancement, practicality and effectiveness of the method proposed in the present invention, and play a good auxiliary role in judging the various types of oscillations caused by the continuous connection of power electronic equipment to the power system.

[0077] Example 2:

[0078] The present invention also proposes a system 200 for identifying broadband oscillation modes in a power system, such as Figure 5 As shown, including:

[0079] An initial unit 201 is used to determine the sensitivity of different oscillation modes of the power system to be analyzed with respect to different control parameters;

[0080] A screening unit 202 is configured to screen out sensitivities that meet the requirements and determine whether the control parameters corresponding to the sensitivities that meet the requirements are related to the power supply;

[0081] an output unit 203 for determining, when the control parameter corresponding to the required sensitivity is related to the power supply, a location and function of the control parameter corresponding to the required sensitivity in the power supply control or circuit, so as to identify a broadband oscillation mode of the power system to be analyzed;

[0082] Used to determine the position and function of the control parameters corresponding to the required sensitivity in the power grid topology of the power system to be analyzed when the control parameters corresponding to the required sensitivity are not related to the power supply, so as to identify the broadband oscillation mode of the power system to be analyzed.

[0083] Before determining the sensitivities of different oscillation modes of the power system to be analyzed relative to different control parameters, the method further includes:

[0084] Obtain the Jacobian matrix after electromagnetic transient modeling of the power system to be analyzed and the eigenvalues / eigenvectors of the Jacobian matrix, determine the oscillation mode to be analyzed and the control parameters to be analyzed based on the Jacobian matrix and the eigenvalues / eigenvectors of the Jacobian matrix, and use the oscillation mode to be analyzed and the control parameters to be analyzed as different oscillation modes and different control parameters, respectively.

[0085] Among them, the sensitivity that meets the requirements is screened out, including:

[0086] The 2-norms of the sensitivities of different oscillation modes of the power system to be analyzed relative to different control parameters are determined, and the sensitivities with 2-norms less than a preset threshold are screened out.

[0087] Determining the control parameters corresponding to the required sensitivity, their location and function in the power supply control or circuit, and identifying the broadband oscillation mode of the power system to be analyzed, includes:

[0088] Determine the control parameters corresponding to the required sensitivity, the bus number and power type where the power supply is located, and based on the bus number and power type, determine the control parameters corresponding to the required sensitivity, the position and function in the power supply control or circuit to identify the broadband oscillation mode of the power system to be analyzed.

[0089] The present invention can analyze the influence of different control parameters on different oscillation modes, further obtain the dominant parameters of different oscillation modes, and identify the oscillation properties and related factors of different modes, and propose relevant analysis methods to solve the broadband oscillation problem in various frequency bands.

[0090] Example 3:

[0091] Based on the same inventive concept, the present invention also provides a computer device, which includes a processor and a memory, wherein the memory is used to store a computer program, the computer program includes program instructions, and the processor is used to execute the program instructions stored in the computer storage medium. The processor may be a central processing unit (CPU), or may be other general-purpose processors, digital signal processors (DSP), application-specific integrated circuits (ASIC), field-programmable gate arrays (FPGA) or other programmable logic devices, discrete gates or transistor logic devices, discrete hardware components, etc. It is the computing core and control core of the terminal, which is suitable for implementing one or more instructions, specifically suitable for loading and executing one or more instructions in the computer storage medium to implement the corresponding method flow or corresponding function, so as to implement the steps of the method in the above embodiment.

[0092] Example 4:

[0093] Based on the same inventive concept, the present invention also provides a storage medium, specifically a computer-readable storage medium (Memory), which is a memory device in a computer device for storing programs and data. It can be understood that the computer-readable storage medium here can include both built-in storage media in the computer device and, of course, extended storage media supported by the computer device. The computer-readable storage medium provides a storage space that stores the operating system of the terminal. In addition, one or more instructions suitable for being loaded and executed by the processor are also stored in the storage space. These instructions can be one or more computer programs (including program codes). It should be noted that the computer-readable storage medium here can be a high-speed RAM memory or a non-volatile memory, such as at least one disk memory. The processor can load and execute one or more instructions stored in the computer-readable storage medium to implement the steps of the method in the above embodiment.

[0094] It will be understood by those skilled in the art that the embodiments of the present invention may be provided as methods, systems, or computer program products. Therefore, the present invention may take the form of a complete hardware embodiment, a complete software embodiment, or an embodiment combining software and hardware. Furthermore, the present invention may take the form of a computer program product implemented on one or more computer-usable storage media (including but not limited to disk storage, CD-ROM, optical storage, etc.) containing computer-usable program code. The solutions in the embodiments of the present invention may be implemented in various computer languages, for example, the object-oriented programming language Java and the interpreted scripting language JavaScript.

[0095] The present invention is described with reference to flowcharts and / or block diagrams of methods, devices (systems), and computer program products according to embodiments of the present invention. It should be understood that each process and / or block in the flowcharts and / or block diagrams, as well as combinations of processes and / or blocks in the flowcharts and / or block diagrams, can be implemented by computer program instructions. These computer program instructions can be provided to a processor of a general-purpose computer, a special-purpose computer, an embedded processor, or other programmable data processing device to produce a machine, so that the instructions executed by the processor of the computer or other programmable data processing device generate instructions for implementing the processes in the flowcharts and / or block diagrams. Figure 1 a process or multiple processes and / or boxes Figure 1 A device that provides the functions specified in a block or multiple blocks.

[0096] These computer program instructions may also be stored in a computer readable memory that can direct a computer or other programmable data processing device to work in a specific manner, so that the instructions stored in the computer readable memory produce an article of manufacture comprising an instruction device, which implements the process Figure 1 a process or multiple processes and / or boxes Figure 1 The function specified in one or more boxes.

[0097] These computer program instructions can also be loaded onto a computer or other programmable data processing device so that a series of operational steps are executed on the computer or other programmable device to produce a computer-implemented process, thereby providing the instructions executed on the computer or other programmable device for implementing the process. Figure 1 a process or multiple processes and / or boxes Figure 1 A step that specifies a function in one or more boxes.

[0098] Although the preferred embodiments of the present invention have been described, those skilled in the art may make additional changes and modifications to these embodiments once they have learned the basic creative concept. Therefore, the appended claims are intended to be interpreted as including the preferred embodiments and all changes and modifications that fall within the scope of the present invention.

[0099] Obviously, those skilled in the art may make various changes and modifications to the present invention without departing from the spirit and scope of the present invention. Thus, if such changes and modifications fall within the scope of the claims and their equivalents, the present invention is intended to include such changes and modifications.

Claims

1. A method for identifying broadband oscillation modes in a power system, characterized in that: The method comprises: Determine the sensitivity of different oscillation modes of the power system to be analyzed with respect to different control parameters; Screening out sensitivities that meet the requirements, and determining whether the control parameters corresponding to the sensitivities that meet the requirements are related to the power supply; If so, determine the control parameter corresponding to the sensitivity that meets the requirements, the position and function of the control parameter in the power control or circuit, so as to identify the broadband oscillation mode of the power system to be analyzed; If not, determining the control parameter corresponding to the sensitivity that meets the requirements, and the position and function of the control parameter in the power grid topology of the power system to be analyzed, so as to identify the broadband oscillation mode of the power system to be analyzed; The screening out of the sensitivity that meets the requirements includes: Determine the 2-norms of the sensitivities of different oscillation modes of the power system to be analyzed relative to different control parameters, and select sensitivities whose 2-norms are less than a preset threshold; The control parameter corresponding to the required sensitivity is determined, and its position and function in the power control or circuit to identify the broadband oscillation mode of the power system to be analyzed includes: Determine the control parameters corresponding to the required sensitivity, the bus number and power type where the power supply is located, and based on the bus number and power type, determine the control parameters corresponding to the required sensitivity, the position and function in the power supply control or circuit to identify the broadband oscillation mode of the power system to be analyzed.

2. The method according to claim 1, characterized in that Before determining the sensitivities of different oscillation modes of the power system to be analyzed relative to different control parameters, the method further includes: Obtain the Jacobian matrix after electromagnetic transient modeling of the power system to be analyzed and the eigenvalues / eigenvectors of the Jacobian matrix, determine the oscillation mode to be analyzed and the control parameters to be analyzed based on the Jacobian matrix and the eigenvalues / eigenvectors of the Jacobian matrix, and use the oscillation mode to be analyzed and the control parameters to be analyzed as different oscillation modes and different control parameters, respectively.

3. A system for identifying broadband oscillation modes in power systems, characterized in that: The system comprises: An initialization unit for determining the sensitivity of different oscillation modes of the power system to be analyzed with respect to different control parameters; A screening unit, configured to screen out sensitivities that meet the requirements, and determine whether the control parameters corresponding to the sensitivities that meet the requirements are related to the power supply; an output unit, configured to determine, when the control parameter corresponding to the required sensitivity is related to the power supply, a location and function of the control parameter corresponding to the required sensitivity in the power supply control or circuit, so as to identify a broadband oscillation mode of the power system to be analyzed; for determining, when the control parameter corresponding to the required sensitivity is not related to the power supply, the position and function of the control parameter corresponding to the required sensitivity in the grid topology of the power system to be analyzed, so as to identify the broadband oscillation mode of the power system to be analyzed; The screening out of the sensitivity that meets the requirements includes: Determine the 2-norms of the sensitivities of different oscillation modes of the power system to be analyzed relative to different control parameters, and select sensitivities whose 2-norms are less than a preset threshold; The control parameter corresponding to the required sensitivity is determined, and its position and function in the power control or circuit to identify the broadband oscillation mode of the power system to be analyzed includes: Determine the control parameters corresponding to the required sensitivity, the bus number and power type where the power supply is located, and based on the bus number and power type, determine the control parameters corresponding to the required sensitivity, the position and function in the power supply control or circuit to identify the broadband oscillation mode of the power system to be analyzed.

4. The system according to claim 3, characterized in that Before determining the sensitivity of different oscillation modes of the power system to be analyzed relative to different control parameters, the initialization unit is further configured to: Obtain the Jacobian matrix after electromagnetic transient modeling of the power system to be analyzed and the eigenvalues / eigenvectors of the Jacobian matrix, determine the oscillation mode to be analyzed and the control parameters to be analyzed based on the Jacobian matrix and the eigenvalues / eigenvectors of the Jacobian matrix, and use the oscillation mode to be analyzed and the control parameters to be analyzed as different oscillation modes and different control parameters, respectively.

5. A computer device, characterized in that: include: one or more processors; a processor for executing one or more programs; When the one or more programs are executed by the one or more processors, the method according to any one of claims 1 to 2 is implemented.

6. A computer-readable storage medium, characterized in that A computer program is stored thereon, and when the computer program is executed, the method according to any one of claims 1 to 2 is implemented.

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