Broadband oscillation risk control method, device, equipment and system

Abstract

The embodiment of the invention provides a broadband oscillation risk control method, device, equipment and system, and relates to the field of power grids, and the method comprises the steps: determining the sensitivity of each protected object at each oscillation frequency point based on the sensitivity of each protected object to broadband oscillation; determining a risk index of the target area based on the first oscillation information of each protected object and the sensitivity corresponding to each protected object at each oscillation frequency point; determining a hazard index generated by each controlled object based on the second oscillation information of each controlled object and the sensitivity corresponding to each protected object at each oscillation frequency point; and under the condition that the risk index of the target area exceeds a preset risk threshold, selecting and switching the controlled object based on the risk index of the target area and the preset risk threshold. The method can effectively eliminate the broadband oscillation risk and guarantee the safe operation of the power grid when the broadband oscillation problem occurs in the regional power grid.

Description

Technical Field

[0001] The present application relates to the field of power grid technology, and in particular to a method, device, equipment and system for controlling broadband oscillation risks. Background Art

[0002] Due to the intermittent, random, and volatile nature of large-scale renewable energy generation, high-proportion, high-capacity power electronic equipment carries the potential risk of inducing broadband oscillations. Broadband oscillations can easily cause widespread disconnection of renewable energy from the grid. Especially in areas with large-scale, concentrated access to renewable energy, these oscillations can lead to cascading failures across multiple power grids, seriously threatening the safe and stable operation of large power grids.

[0003] In response to the problems caused by broadband oscillations, broadband oscillation control devices have been deployed in some areas at this stage. However, the control method adopted by such devices is relatively extensive, which can easily cause excessive control and affect normal power production. Summary of the Invention

[0004] The embodiments of the present application provide a broadband oscillation risk control method, apparatus, device, and system to effectively eliminate broadband oscillation risks and ensure safe operation of the regional power grid when broadband oscillation problems occur.

[0005] In a first aspect, embodiments of the present application provide a broadband oscillation risk control method, which is applied to a target area, wherein the target area includes a protected object and a controlled object; the method comprises:

[0006] Determining the sensitivity of each protected object at each oscillation frequency based on the sensitivity of each protected object to broadband oscillation;

[0007] determining a risk index of the target area based on the first oscillation information of each protected object and the sensitivity of each protected object corresponding to each oscillation frequency point;

[0008] determining a hazard index generated by each of the controlled objects based on the second oscillation information of each of the controlled objects and the sensitivity of each of the protected objects corresponding to each oscillation frequency point;

[0009] In a case where the risk index of the target area exceeds a preset risk threshold, the controlled object is selected based on the risk index of the target area and the preset risk threshold.

[0010] In some embodiments, the first oscillation information includes a first amplitude corresponding to each first frequency point; and the step of determining the risk index of the target area includes:

[0011] For each of the protected objects, determining a risk indicator of each of the protected objects based on the first amplitude corresponding to each of the first frequency points and the sensitivity of the protected object corresponding to each of the first frequency points;

[0012] The risk index of the target area is determined based on the sum of the risk indexes of all the protected objects.

[0013] In some embodiments, the step of determining the risk indicator of each protected object includes:

[0014] multiplying the first amplitude corresponding to each first frequency point by the sensitivity of the protected object at the first frequency point to determine the risk index of the protected object at each first frequency point;

[0015] The sum of the risk indicators of the protected object at all the first frequency points is determined as the risk indicator of the protected object.

[0016] In some embodiments, the second oscillation information includes a second amplitude corresponding to each second frequency point; and the step of determining the hazard index generated by each of the controlled objects includes:

[0017] Determining the sensitivity of the target area corresponding to each oscillation frequency point based on the sum of the sensitivities of each protected object corresponding to each oscillation frequency point;

[0018] For each of the controlled objects, a hazard index generated by each of the controlled objects is determined based on the second amplitude corresponding to each of the second frequency points and the sensitivity of the target area corresponding to each of the second frequency points.

[0019] In some embodiments, determining the hazard index generated by each of the controlled objects based on the second amplitude corresponding to each of the second frequency points and the sensitivity of the target area corresponding to each of the second frequency points includes:

[0020] determining the product of the second amplitude corresponding to the second frequency point and the sensitivity of the target area corresponding to the second frequency point as the hazard index of the controlled object at the second frequency point;

[0021] The sum of the hazard indicators of the controlled object at all the second frequency points is determined as the hazard indicator generated by the controlled object.

[0022] In some embodiments, selecting the controlled object based on the risk indicator of the target area and the preset risk threshold includes:

[0023] Determining a risk indicator to be controlled based on the difference between the risk indicator of the target area and the preset risk threshold;

[0024] The controlled objects are selected in a preset order until the sum of the hazard indicators generated by the selected controlled objects exceeds the risk indicator to be controlled.

[0025] In some embodiments, the preset order includes the order of the hazard indicators generated by each of the controlled objects from large to small.

[0026] In a second aspect, an embodiment of the present application provides a broadband oscillation risk control device, which is applied to a target area, wherein the target area includes a protected object and a controlled object; the device includes:

[0027] a sensitivity evaluation module, configured to determine the sensitivity of each protected object at each oscillation frequency point based on the sensitivity of each protected object to broadband oscillation;

[0028] a regional risk calculation module, configured to determine a risk index of the target area based on the first oscillation information of each protected object and the sensitivity of each protected object at each oscillation frequency point;

[0029] an oscillation hazard calculation module, configured to determine a hazard index generated by each of the controlled objects based on the second oscillation information of each of the controlled objects and the sensitivity of each of the protected objects corresponding to each oscillation frequency point;

[0030] The oscillation risk control module is configured to select the controlled object based on the risk index of the target area and the preset risk threshold when the risk index of the target area exceeds a preset risk threshold.

[0031] In a third aspect, an embodiment of the present application provides a broadband oscillation risk control device, comprising a memory, a processor, and a computer program stored in the memory and executable on the processor; when the processor executes the computer program, the steps of the broadband oscillation risk control method as described in any one of claims 1 to 7 are implemented.

[0032] In a fourth aspect, an embodiment of the present application provides a broadband oscillation risk control system, comprising a control master station, a measuring station, and a monitoring station, wherein the measuring station and the monitoring station are respectively communicatively connected to the control master station, the measuring station is used to characterize control equipment installed in a protected substation, and the monitoring station is used to characterize control equipment installed in a controlled substation;

[0033] The control master station is used to adopt the broadband oscillation risk control method as described in any one of the first aspects, or to configure the broadband oscillation risk control device as described in the second aspect.

[0034] The broadband oscillation risk control method provided in the embodiments of the present application can quantitatively assess the broadband oscillation risk faced by the target area and the oscillation hazard of the broadband oscillation source in the area in real time. When the broadband oscillation risk has affected the safe operation of the power grid, the oscillation source is optimized and removed to eliminate the oscillation risk. Furthermore, the broadband oscillation risk is effectively eliminated through refined control to ensure the safe operation of the power grid. BRIEF DESCRIPTION OF THE DRAWINGS

[0035] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the following briefly introduces the drawings required for use in the description of the embodiments. Obviously, the drawings described below are only some embodiments of the present application. For those skilled in the art, other drawings can be obtained based on these drawings without creative work.

[0036] Figure 1 A schematic diagram of the structure of a broadband oscillation risk control system provided in an embodiment of the present application;

[0037] Figure 2 A schematic diagram of the overall process of the broadband oscillation risk control method provided in an embodiment of the present application;

[0038] Figure 3 This is an example schematic diagram of the sensitivity of the protected object corresponding to each oscillation frequency point in the embodiment of the present application;

[0039] Figure 4 This is a schematic diagram of the structure of the broadband oscillation risk control device provided in an embodiment of the present application.

[0040] Description of reference numerals:

[0041] 10-control main station; 20-measurement station; 30-monitoring station; 401-sensitivity assessment module; 402-regional risk calculation module; 403-oscillation hazard calculation module; 404-oscillation risk control module. DETAILED DESCRIPTION

[0042] The following will be combined with the drawings in the embodiments of this application to clearly and completely describe the technical solutions in the embodiments of this application. Obviously, the embodiments described are only part of the embodiments of this application, not all of the embodiments. Based on the embodiments in this application, all other embodiments obtained by those skilled in the art without making creative efforts are within the scope of protection of this application.

[0043] In the description of the present application, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present application. In addition, the terms "first" and "second" are used for descriptive purposes only and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the said features. In the description of the present application, "multiple" means two or more, unless otherwise clearly and specifically defined.

[0044] “A and / or B” includes the following three combinations: A only, B only, and a combination of A and B.

[0045] The use of "suitable for" or "configured to" in this application is intended to be open and inclusive language, and does not exclude devices that are adapted or configured to perform additional tasks or steps. In addition, the use of "based on" is intended to be open and inclusive, as a process, step, calculation, or other action that is "based on" one or more stated conditions or values ​​may, in practice, be based on additional conditions or values ​​beyond those stated.

[0046] In this application, the word "exemplary" is used to mean "serving as an example, illustration, or illustration." Any embodiment described in this application as "exemplary" is not necessarily to be construed as preferred or advantageous over other embodiments. The following description is given to enable any person skilled in the art to implement and use the present application. In the following description, details are listed for the purpose of explanation. It should be understood that one of ordinary skill in the art can recognize that the present application can be implemented without using these specific details. In other instances, well-known structures and processes are not elaborated in detail to avoid obscuring the description of the present application with unnecessary details. Therefore, the present application is not intended to be limited to the embodiments shown, but is consistent with the widest scope consistent with the principles and features disclosed in this application.

[0047] To achieve my country's carbon reduction and energy consumption goals, the proportion of new energy sources and power electronics, represented by wind power, photovoltaics, energy storage, and DC power, in my country's new power system will inevitably increase significantly. Due to the intermittent, random, and volatile nature of large-scale renewable energy generation, a high proportion of large-capacity power electronics carries the potential risk of causing broadband oscillations. Broadband oscillations can easily cause widespread disconnection of renewable energy sources. Especially in areas with large-scale, concentrated access to renewable energy, this can lead to cascading failures across multiple power grids, seriously threatening the safe and stable operation of large power grids.

[0048] To address the problems caused by broadband oscillations, broadband oscillation control devices have been deployed in some areas, but the control methods used by these devices are relatively extensive. First, the current broadband oscillation control methods usually control based on the surface characteristics of broadband oscillations. Once broadband oscillations occur in the power grid, measures are taken immediately. Control is not guided by the consequences caused by broadband oscillations, which can easily cause excessive control and affect normal power production. Second, at this stage, the different frequency points of broadband oscillations are not differentiated, and oscillation problems within all broadband bands are considered uniformly. Therefore, there is an urgent need to explore new broadband oscillation wind control methods.

[0049] In view of this, the embodiments of the present application provide a method, device, equipment and system for controlling the risk of broadband oscillation. By taking the actual hazards caused by broadband oscillation as a guide, the broadband oscillation risk is quantitatively assessed, and a refined control method is adopted to effectively eliminate the oscillation object, thereby solving at least one of the above-mentioned technical problems.

[0050] See also Figure 1 , Figure 1 A schematic structural diagram of a broadband oscillation risk control system provided in an embodiment of the present application. The broadband oscillation risk control system includes a control master station 10, a measuring station 20, and a monitoring station 30. The measuring station 20 and the monitoring station 30 are respectively connected to the control master station 10 for communication. The measuring station 20 is used to characterize the control equipment installed in the protected substation, and the monitoring station 30 is used to characterize the control equipment installed in the controlled substation. The control master station 10 is used to adopt the broadband oscillation risk control method of the embodiment of the present application, or to configure the broadband oscillation risk control device of the embodiment of the present application. The number of control master stations 10 is one, the number of measuring stations 20 is N, and the number of monitoring stations 30 is M, where M and N are both positive integers.

[0051] The following describes a method for controlling broadband oscillation risks according to an embodiment of the present application.

[0052] See also Figure 2 , Figure 2This is a schematic diagram of the overall process of the broadband oscillation risk control method provided in an embodiment of the present application. This broadband oscillation risk control method is applied to a target area, which includes protected objects and controlled objects. The target area is used to represent the scope of the defense area. This broadband oscillation risk control method specifically includes the following steps:

[0053] Step 201: Based on the sensitivity of each protected object to broadband oscillation, determine the sensitivity of each protected object at each oscillation frequency point.

[0054] See also Figure 3 , Figure 3 This is an example diagram of the sensitivity of the protected objects at various oscillation frequencies in the embodiment of the present application. Specifically, the protected objects sensitive to broadband oscillations are determined within the defense area. Based on the sensitivity of each protected object to oscillation components at different frequencies within the broadband range, a functional relationship between the oscillation frequency and sensitivity of each protected object is established, that is, the sensitivity S of each protected object at each oscillation frequency f is . i (f). The closer the oscillation frequency is to the oscillation sensitive frequency, the larger the value of the sensitivity function.

[0055] Step 202: Determine a risk index of a target area based on the first oscillation information of each protected object and the sensitivity of each protected object corresponding to each oscillation frequency point.

[0056] In some examples, the first oscillation information may include a first amplitude corresponding to each first frequency point. Specifically, the first frequency point and the corresponding first amplitude value of the broadband oscillation component in the electrical quantity of each protected object may be monitored in real time.

[0057] In some embodiments, step 202 may be implemented by:

[0058] Step 1: For each protected object, determine the risk index of each protected object based on the first amplitude corresponding to each first frequency point and the sensitivity of the protected object corresponding to each first frequency point.

[0059] The sensitivity of the protected object at each first frequency point is based on the sensitivity S of the protected object at each oscillation frequency point f. i (f) Obtain, that is, the sensitivity S corresponding to each oscillation frequency f i In (f), find the sensitivity corresponding to the first frequency point.

[0060] For example, the risk indicator of each protected object may be determined by the following steps:

[0061] In the first step, the product of the first amplitude corresponding to each first frequency point and the sensitivity of the protected object corresponding to the first frequency point is determined as the risk index of the protected object at each first frequency point.

[0062] Specifically, the first amplitude A of a single protected object at a single first frequency point is i (f1) and the sensitivity S corresponding to the first frequency point i (f1) to obtain the risk index of a single protected object at a single first frequency point.

[0063] In the second step, the sum of the risk indicators of the protected object at all first frequency points is determined as the risk indicator of the protected object.

[0064] Specifically, the risk index of all first frequency points of a single protected object is accumulated to obtain the risk index of broadband oscillation of a single protected object. i (f) can be represented by the following formula:

[0065]

[0066] Among them, f low and f high For example, if the wide-band oscillation range is 0.1Hz to 2500Hz, f low It expresses 0.1Hz, f high Indicates 2500Hz. i (f1) is the first amplitude of a single protected object at a single first frequency point, S i (f1) is the sensitivity of a single protected object at the corresponding first frequency point.

[0067] Step 2: Determine the risk index of the target area based on the sum of the risk indicators of all protected objects.

[0068] Specifically, the risk index Risk(f) of all protected objects in the defense area is accumulated to obtain the risk index of the target area.

[0069] Step 203: Determine a hazard index generated by each controlled object based on the second oscillation information of each controlled object and the sensitivity of each protected object corresponding to each oscillation frequency point.

[0070] In some examples, the second oscillation information may include a second amplitude corresponding to each second frequency point. Specifically, the second frequency point and the corresponding second amplitude value of the broadband oscillation component in the electrical quantity of each controlled object may be monitored in real time.

[0071] In some embodiments, step 203 may be implemented by:

[0072] Step 1: Based on the sum of the sensitivities of each protected object at each oscillation frequency point, the sensitivity of the target area corresponding to each oscillation frequency point is determined.

[0073] Specifically, the sensitivity functions of all protected objects in the area can be accumulated to obtain the sensitivity of the target area S total (f) can be represented by the following formula:

[0074]

[0075] Among them, S i (f) is the sensitivity of the protected object at each oscillation frequency point f, i is an integer greater than or equal to 1 and less than or equal to N, and N is the number of protected objects.

[0076] Step 2: For each controlled object, based on the second amplitude corresponding to each second frequency point and the sensitivity of the target area corresponding to each second frequency point, determine the hazard index generated by each controlled object.

[0077] For example, the hazard index generated by each controlled object can be determined by the following steps:

[0078] In the first step, the product of the second amplitude corresponding to the second frequency point and the sensitivity of the target area corresponding to the second frequency point is determined as the hazard index of the controlled object at the second frequency point.

[0079] Specifically, the sensitivity of the target area corresponding to the second frequency point f2 is based on the sensitivity S of the target area corresponding to each oscillation frequency point f. total (f) Obtain, that is, the sensitivity S of the target area corresponding to each oscillation frequency point f total (f) Find the target area sensitivity S corresponding to the second frequency point f2 total (f2). The second amplitude A corresponding to the second frequency point f2 source_i (f2) The sensitivity S of the target area corresponding to the second frequency point f2 total (f2) to calculate the hazard index of a single controlled object at a single second frequency point f2.

[0080] In the second step, the sum of the hazard indicators of the controlled object at all second frequency points is determined as the hazard indicator generated by the controlled object.

[0081] Specifically, the hazard index of all second frequency points f2 of a single controlled object is accumulated to obtain the hazard index H generated by the single controlled object. source_i , which can be specifically represented by the following formula:

[0082]

[0083] Among them, f low and f high A is the lower and upper frequency limit of the wide frequency oscillation range. source_i (f2) is the second amplitude corresponding to the second frequency point f2, S total (f2) is the sensitivity of the target area corresponding to the second frequency point f2.

[0084] Step 204: When the risk index of the target area exceeds the preset risk threshold, a controlled object is selected based on the risk index of the target area and the preset risk threshold.

[0085] Specifically, the control master station 10 may set a preset risk threshold, which may be set according to actual conditions, and the embodiment of the present application does not specifically limit this.

[0086] In some embodiments, step 204 may be implemented by:

[0087] Step 1: Determine the risk indicators that need to be controlled based on the difference between the risk indicators of the target area and the preset risk threshold.

[0088] Specifically, the risk index of the target area is subtracted from the preset risk threshold to obtain the risk index that needs to be controlled.

[0089] Step 2: Select the controlled objects in a preset order until the sum of the hazard indicators generated by the selected controlled objects exceeds the risk indicator to be controlled.

[0090] For example, the preset order may include the order of hazard indicators generated by each controlled object from largest to smallest. Specifically, if the real-time calculated risk indicator of the target area exceeds a preset risk threshold, the preset risk threshold is subtracted from the target area's risk indicator to obtain the required risk indicator. When selecting controlled objects, the selected controlled objects are selected from the order of hazard indicators generated, from largest to smallest, until the sum of the hazard indicator values ​​generated by the selected controlled objects exceeds the required risk indicator.

[0091] The controlled interval oscillation component in the target area must exceed a certain threshold before it can be included in the controllable range. After determining the controlled object to be removed, the control master station 10 will send a control command to each controlled object monitoring station 30 to enable each controlled object to execute the corresponding command.

[0092] It can be understood that the broadband oscillation risk control method of the embodiment of the present application can quantitatively evaluate the broadband oscillation risk faced by the target area and the oscillation hazard of the broadband oscillation source in the area in real time. When the broadband oscillation risk has affected the safe operation of the power grid, the oscillation source is optimized and removed to eliminate the oscillation risk, and then the broadband oscillation risk is effectively eliminated through refined control to ensure the safe operation of the power grid.

[0093] Accordingly, the embodiment of the present application also provides a broadband oscillation risk control device. Figure 4 , Figure 4 Schematic diagram of the structure of a broadband oscillation risk control device provided in an embodiment of the present application. The broadband oscillation risk control device is applied to a target area and can be configured in a control master station 10. The device includes a sensitivity assessment module 401, a regional risk calculation module 402, an oscillation hazard calculation module 403, and an oscillation risk control module 404.

[0094] The sensitivity evaluation module 401 is configured to determine the sensitivity of each protected object at each oscillation frequency point based on the sensitivity of each protected object to the broadband oscillation.

[0095] The regional risk calculation module 402 is configured to determine a risk index of a target area based on the first oscillation information of each protected object and the sensitivity of each protected object at each oscillation frequency point.

[0096] The oscillation hazard calculation module 403 is configured to determine a hazard index generated by each controlled object based on the second oscillation information of each controlled object and the sensitivity of each protected object corresponding to each oscillation frequency point.

[0097] The oscillation risk control module 404 is configured to select a controlled object based on the risk indicator of the target area and the preset risk threshold when the risk indicator of the target area exceeds the preset risk threshold.

[0098] It should be noted that the functions of each module in the embodiment of the device of the present application correspond one-to-one to the steps in the aforementioned method embodiment. For the contents not described in detail in the embodiment of the present application, please refer to the relevant introduction in the aforementioned method embodiment, and no further details will be given here.

[0099] It can be understood that the broadband oscillation risk control device of the embodiment of the present application can quantitatively evaluate the broadband oscillation risk faced by the target area and the oscillation hazard of the broadband oscillation source in the area in real time. When the broadband oscillation risk has affected the safe operation of the power grid, the oscillation source is optimized and cut off to eliminate the oscillation risk, and then the broadband oscillation risk is effectively eliminated through refined control to ensure the safe operation of the power grid.

[0100] Accordingly, embodiments of the present application also provide a broadband oscillation risk control device. The broadband oscillation risk control device includes a memory, a processor, and a computer program stored in the memory and executable by the processor. When the processor executes the computer program, the steps of the broadband oscillation risk control method of the embodiments of the present application are implemented.

[0101] The above is a detailed introduction to a broadband oscillation risk control method, device, equipment and system provided in the embodiments of the present application. Specific examples are used herein to illustrate the principles and implementation methods of the present application. The description of the above embodiments is only used to help understand the method and core ideas of the present application. At the same time, for those skilled in the art, based on the ideas of the present application, there may be changes in the specific implementation methods and application scope. In summary, the content of this specification should not be understood as limiting the present application.

Claims

1. A broadband oscillation risk control method, characterized in that: Applied to a target area, the target area includes a protected object and a controlled object; the method includes: Determining the sensitivity of each protected object at each oscillation frequency based on the sensitivity of each protected object to broadband oscillation; determining a risk index of the target area based on the first oscillation information of each protected object and the sensitivity of each protected object corresponding to each oscillation frequency point; determining a hazard index generated by each of the controlled objects based on the second oscillation information of each of the controlled objects and the sensitivity of each of the protected objects corresponding to each oscillation frequency point; In a case where the risk index of the target area exceeds a preset risk threshold, the controlled object is selected based on the risk index of the target area and the preset risk threshold.

2. The broadband oscillation risk control method according to claim 1, wherein: The first oscillation information includes a first amplitude corresponding to each first frequency point; The steps of determining the risk indicator of the target area include: For each of the protected objects, determining a risk indicator of each of the protected objects based on the first amplitude corresponding to each of the first frequency points and the sensitivity of the protected object corresponding to each of the first frequency points; The risk index of the target area is determined based on the sum of the risk indexes of all the protected objects.

3. The broadband oscillation risk control method according to claim 2, wherein: The steps of determining the risk indicator of each protected object include: multiplying the first amplitude corresponding to each first frequency point by the sensitivity of the protected object at the first frequency point to determine the risk index of the protected object at each first frequency point; The sum of the risk indicators of the protected object at all the first frequency points is determined as the risk indicator of the protected object.

4. The broadband oscillation risk control method according to claim 1, wherein: The second oscillation information includes a second amplitude corresponding to each second frequency point; The steps of determining the hazard index generated by each of the controlled objects include: Determining the sensitivity of the target area corresponding to each oscillation frequency point based on the sum of the sensitivities of each protected object corresponding to each oscillation frequency point; For each of the controlled objects, a hazard index generated by each of the controlled objects is determined based on the second amplitude corresponding to each of the second frequency points and the sensitivity of the target area corresponding to each of the second frequency points.

5. The broadband oscillation risk control method according to claim 4, characterized in that: The determining, based on the second amplitude corresponding to each second frequency point and the sensitivity of the target area corresponding to each second frequency point, a hazard index generated by each controlled object includes: determining the product of the second amplitude corresponding to the second frequency point and the sensitivity of the target area corresponding to the second frequency point as the hazard index of the controlled object at the second frequency point; The sum of the hazard indicators of the controlled object at all the second frequency points is determined as the hazard indicator generated by the controlled object.

6. The broadband oscillation risk control method according to claim 1, wherein: The selecting the controlled object based on the risk indicator of the target area and the preset risk threshold includes: Determining a risk indicator to be controlled based on the difference between the risk indicator of the target area and the preset risk threshold; The controlled objects are selected in a preset order until the sum of the hazard indicators generated by the selected controlled objects exceeds the risk indicator to be controlled.

7. The broadband oscillation risk control method according to claim 6, wherein: The preset order includes the order of the hazard indicators generated by each of the controlled objects from large to small.

8. A broadband oscillation risk control device, characterized in that: Applied to a target area, the target area includes a protected object and a controlled object; the device includes: a sensitivity evaluation module, configured to determine the sensitivity of each protected object at each oscillation frequency point based on the sensitivity of each protected object to broadband oscillation; a regional risk calculation module, configured to determine a risk index of the target area based on the first oscillation information of each protected object and the sensitivity of each protected object at each oscillation frequency point; an oscillation hazard calculation module, configured to determine a hazard index generated by each of the controlled objects based on the second oscillation information of each of the controlled objects and the sensitivity of each of the protected objects corresponding to each oscillation frequency point; The oscillation risk control module is configured to select the controlled object based on the risk index of the target area and the preset risk threshold when the risk index of the target area exceeds a preset risk threshold.

9. A broadband oscillation risk control device, characterized in that: The invention comprises a memory, a processor, and a computer program stored in the memory and executable on the processor; when the processor executes the computer program, the steps of the broadband oscillation risk control method according to any one of claims 1 to 7 are implemented.

10. A broadband oscillation risk control system, characterized in that: It includes a control master station, a measuring station and a monitoring station, wherein the measuring station and the monitoring station are respectively connected to the control master station in communication, the measuring station is used to characterize the control equipment installed in the protected substation, and the monitoring station is used to characterize the control equipment installed in the controlled substation; The control master station is used to adopt the broadband oscillation risk control method according to any one of claims 1 to 7, or to configure the broadband oscillation risk control device according to claim 8.

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