Coupling power system stability control strategy collaborative control method and related equipment thereof

Abstract

The application provides a coupling power system stability control strategy collaborative control method, device, equipment and readable storage medium, which can be used for a stability control master station of a power system, especially a wide-area collaborative stability control master station. When multiple coupling stability control strategies exist in the power system, such as a stability control strategy triggered locally by the power system and a strategy for processing a remote control command simultaneously or sequentially exporting an action command in a short time and acting on the same group of controlled objects, the collaborative control of the multiple stability control strategies can be realized through a coordination mechanism independent of the stability control strategies, without changing the related strategies or changing other strategies after the partial strategies are updated, so as to reduce the under-tripping and over-tripping risks of the stability control master station of the power system when the coupling strategies exist, reduce the design difficulty of the stability control strategy collaborative control, reduce the mutual influence of the strategy and device updating, effectively realize that the total control amount result is controlled reasonably, and neither cause over-control nor cause loss of control, which harms the stability of the power system.

Description

Technical Field

[0001] This application relates to the field of power system control technology, and in particular to a method, apparatus, equipment and readable storage medium for coordinated control of coupled power system stability control strategies. Background Technology

[0002] In practical applications, the power system control system is generally summarized as a "three-line defense" safety and stability control system. The second line of defense refers to the implementation of control measures such as generator tripping, load shedding, and partial disconnection according to predetermined control strategies, based on pre-considered fault types and operating modes, to prevent system instability. In recent years, the development of stability control system technology has shown two distinct trends: First, wide-area collaboration, reshaping the three-line defense system; second, standardization and modularization of strategies and devices. Under these development trends, the complexity of stability control strategies at control master stations, especially wide-area coordinated control master stations, has increased. They require coordination of heterogeneous control resources across a wide area and responses to various fault disturbances or multiple, multi-level control demands. Coupled scenarios where multiple local or remote control measures need to issue control commands to the same or the same group of controlled objects are becoming increasingly common.

[0003] If multiple local or remote control policies need to issue control commands to the same or the same group of controlled objects within a short period of time, a unified and standardized coordination mechanism, independent of the initiating control policy, is required to form the most advantageous overall control measure. This necessitates that the final output control command of the coordinating master station ensures that the control needs of multiple local or remote policies are met; and on this basis, it is desirable to minimize the final control volume. Secondly, it is desirable that the coordination mechanism achieving the above effect is through a unified and standardized interface, internally independent of the local or remote policies.

[0004] In practical applications, each stability control strategy action signifies a second-level disturbance. When multiple strategies take effect, the traditional second line of defense in the power system is exceeded. However, when controlled objects overlap, the final action command must be clearly defined to ensure the controllability and rationality of the control quantity. Often, a wide-area collaborative master station possesses the information needed to infer the optimal comprehensive control quantity after multiple second-level faults occur. Furthermore, the three-line defense system itself is evolving. Therefore, researching coupling strategy coordination mechanisms is essential. However, current engineering practice lacks dedicated coupling strategy coordination functions. The most common solution to coupling problems is to consider simultaneous or sequential concurrent scenarios when designing the aforementioned "multiple local or remote strategies" to eliminate the risk of mutual conflicts or unreasonable uncoordinated control quantities. Clearly, such a solution cannot meet the technical requirements of the aforementioned industry development trends. Summary of the Invention

[0005] This application aims to at least address one of the aforementioned technical deficiencies. In view of this, this application provides a method, apparatus, device, and readable storage medium for coordinated control of coupled power system stability control strategies, which addresses the technical deficiency in the prior art of making it difficult to coordinate control of safety and stability control strategies for coupled power systems.

[0006] A coordinated control method for coupled power system stability control strategies includes:

[0007] Determine the comprehensive cumulative demand control quantity of the first target controlled object of the target coupled power system's stability control master station at the current strategy exit moment;

[0008] Determine the control priority of the first target controlled object at the current policy exit time;

[0009] Based on the comprehensive cumulative demand control quantity and control priority of the first target controlled object, determine the action object and action quantity corresponding to the target exit strategy;

[0010] Based on the action object and action quantity corresponding to the target exit strategy, the target exit strategy is executed to achieve stable control of the target coupled power system.

[0011] Preferably, determining the comprehensive cumulative demand control quantity of the first target controlled object of the target coupled power system's stability control master station at the current strategy exit time includes:

[0012] Based on the control strategies of each target controlled object of the target coupled power system's stability control master station at the current strategy exit time, determine the cumulative control demand sequence of the entire strategy function group of the first target controlled object;

[0013] Based on the cumulative control demand sequence of the policy function group of the first target controlled object, determine the set of demand policies of the first target controlled object up to the current policy exit time;

[0014] Based on the cumulative control demand sequence of the first target controlled object's strategy function group, the preset orthogonal set partitioning rules, and the demand strategy set of the first target controlled object, the strategy grouping of the first target controlled object is determined.

[0015] Based on the strategy grouping of the first target controlled object, determine the comprehensive cumulative demand control amount of the first target controlled object.

[0016] Preferably, determining the control priority of the first target controlled object at the current policy exit time includes:

[0017] Based on the current exit time of the strategy, determine the latest control strategy received by the first target controlled object;

[0018] The control priority of the latest control policy received by the first target controlled object is determined as the control priority of the first target controlled object at the current policy exit time.

[0019] Preferably, determining the action object and action quantity corresponding to the target exit strategy based on the comprehensive cumulative demand control quantity and control priority of the first target controlled object includes:

[0020] Based on the control priority of the first target controlled object, determine the action object corresponding to the target exit strategy;

[0021] Based on the comprehensive cumulative control quantity and control priority of the first target controlled object and the action object corresponding to the target exit strategy, the action quantity corresponding to the target exit strategy is determined.

[0022] Preferably, determining the action quantity corresponding to the target exit strategy based on the comprehensive cumulative control quantity and control priority of the first target controlled object and the action object corresponding to the target exit strategy includes:

[0023] Determine whether the state of the first target controlled object is uncuttable at a preset time before the target exit strategy time;

[0024] If, at a preset time before the target exit policy time, there is a controlled object in the first target controlled object whose state is uncuttable, then the controlled object in the first target controlled object whose state is uncuttable at the preset time before the target exit policy time will be deleted to obtain the second target controlled object.

[0025] Based on the difference between the comprehensive cumulative control quantity of the first target controlled object and the control quantity completed before the target exit strategy time, the new demand control quantity of the second target controlled object is determined as the action quantity corresponding to the target exit strategy.

[0026] Preferably, the step of partitioning according to a preset orthogonal set rule includes:

[0027] The stability problems solved by the strategies for each control requirement of the first target controlled object in the preset orthogonal set up up to the current strategy exit time have no overlap.

[0028] The preset orthogonal set is included in the demand strategy set of the first target controlled object.

[0029] Preferably, the preset time point is the time point corresponding to the target exit strategy time up to the 200th millisecond before the target exit strategy time.

[0030] A coupled power system stability control strategy collaborative control device, comprising:

[0031] The first demand control quantity determination unit is used to determine the comprehensive cumulative demand control quantity of the first target controlled object of the target coupled power system's stability control master station at the current strategy exit time.

[0032] The first control priority determination unit is used to determine the control priority of the first target controlled object at the current policy exit time.

[0033] The target exit strategy determination unit is used to determine the action object and action quantity corresponding to the target exit strategy based on the comprehensive cumulative demand control quantity of the first target controlled object and its control priority.

[0034] An execution unit is used to execute the target exit strategy according to the action object and action quantity corresponding to the target exit strategy in order to achieve stable control of the target coupled power system.

[0035] A coupled power system stability control strategy collaborative control device includes: one or more processors, and a memory;

[0036] The memory stores computer-readable instructions, which, when executed by the one or more processors, implement the steps of the coordinated control method for the coupled power system stability control strategy as described above.

[0037] A readable storage medium storing computer-readable instructions, which, when executed by one or more processors, cause the one or more processors to implement the steps of the coordinated control method for the coupled power system stability control strategy as described in any of the foregoing descriptions.

[0038] As can be seen from the technical solutions described above, when it is necessary to coordinate the control of various safety and stability control strategies of a coupled power system, the method provided in this application embodiment can determine the comprehensive cumulative demand control quantity of the first target controlled object of the stability control master station of the target coupled power system at the current strategy exit time; and determine the control priority of the first target controlled object at the current strategy exit time; so that the action object and action quantity corresponding to the target exit strategy can be determined based on the comprehensive cumulative demand control quantity and control priority of the first target controlled object; so that the target exit strategy can be executed based on the action object and action quantity corresponding to the target exit strategy to achieve stable control of the target coupled power system.

[0039] The method provided in this application can be used in the power system's stability control master station, especially in the wide-area collaborative stability control master station of the power system. When there are multiple coupled stability control strategies in the power system, such as the local triggering stability control strategy and the strategy for processing remote control commands, when they simultaneously and in short-term succession output action commands and act on the same group of controlled objects, the method provided in this application can achieve collaborative control of multiple stability control strategies through a coordination mechanism independent of these stability control strategies, without significantly changing the relevant strategies, or without changing other strategies after some strategies are updated. This reduces the risk of under-cutting and over-cutting when there are coupled strategies in the power system's stability control master station, reduces the design difficulty of collaborative control of stability control strategies, reduces the mutual influence of strategy and device updates, and effectively ensures that the overall control result is reasonably controlled, neither leading to excessive stability control of the power system nor causing the power system to run out of control and endanger the stability of the power system. Attached Figure Description

[0040] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0041] Figure 1 A flowchart illustrating a method for coordinated control of a coupled power system stability control strategy is provided in this application embodiment.

[0042] Figure 2 This application provides a schematic diagram illustrating the principle of solving the stability problem of coupled power systems in an embodiment of the present application.

[0043] Figure 3 This is a schematic diagram illustrating the structure of a coupled power system stability control strategy collaborative control device, as exemplified by an embodiment of this application.

[0044] Figure 4 This is a hardware structure block diagram of a coupled power system stability control strategy collaborative control device disclosed in an embodiment of this application. Detailed Implementation

[0045] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0046] Given that most current coupled power system stability control strategy collaborative control schemes are ill-suited to complex and ever-changing business requirements, this applicant has researched a coupled power system stability control strategy collaborative control scheme. This method can be used in power system stability control master stations, especially in wide-area collaborative stability control master stations. When multiple coupled stability control strategies exist in the power system, such as locally triggered stability control strategies and strategies for processing remote control commands, and when these strategies simultaneously and sequentially issue action commands and act on the same group of controlled objects, the method provided in this application can achieve collaborative control of multiple stability control strategies through a coordination mechanism independent of these strategies. This is possible without significantly altering the relevant strategies, or without changing other strategies after some strategies are updated. This reduces the risk of under-cutting and over-cutting when coupled strategies exist in the power system stability control master station, lowers the design difficulty of coordinated stability control, reduces the mutual influence of strategy and device updates, and effectively ensures that the overall control result is reasonably controlled, meaning that there will be no over-control or power system runaway, thus protecting the stability of the power system.

[0047] The methods provided in this application can be used in a variety of general-purpose or special-purpose computing device environments or configurations. For example: personal computers, server computers, handheld or portable devices, tablet devices, multiprocessor devices, distributed computing environments including any of the above devices, etc.

[0048] This application provides a method for coordinated control of a coupled power system stability control strategy. This method can be applied to various power systems and to various computer terminals or smart terminals. The executing entity can be the processor or server of the computer terminal or smart terminal.

[0049] The following is combined Figure 1 This paper introduces the flowchart of the coordinated control method for coupled power system stability control strategies provided in the embodiments of this application, such as... Figure 1 As shown, the process may include the following steps:

[0050] Step S101: Determine the comprehensive cumulative demand control quantity of the first target controlled object of the target coupled power system's stability control master station at the current strategy exit time.

[0051] Specifically, in practical applications, after decades of theoretical exploration and experience accumulation in the operation of interconnected large power grids, the relevant normative system of power system safety and stability guidelines has gradually matured, and the power system has gradually formed a safety and stability control system summarized as "three lines of defense".

[0052] in,

[0053] The second line of defense for the power system mainly targets the pre-considered fault types and operating modes. According to the predetermined control strategy, it adopts a safe and stable control system or safe and stable control device to implement control measures such as generator tripping, load shedding, and partial disconnection to prevent the power system from losing stability.

[0054] In recent years, the development of power system stability control technology has shown two main trends:

[0055] First, the power system's stability control strategy has gradually shifted towards wide-area coordinated regulation, reshaping the power system's three-line defense system.

[0056] As of 2021, some countries have established system protection for multiple regional power grids, integrated regional stability control resources, and provided coordinated control for serious faults such as cross-regional large DC blocking. Event triggering and state triggering technologies are no longer confined to the second and third lines of defense. The rapid control and protection functions of DC and other power electronic control devices have a significant impact on the system, breaking the traditional timing assumption of sequential action between the three lines of defense.

[0057] A regional power grid has also established a multi-DC coordinated stability control system for the sending end to a certain location and a multi-DC coordinated stability control system for the receiving end of the Greater Bay Area.

[0058] Under this development trend, the stability control strategy of the main control station of the power system stability control system, especially the wide-area coordinated control station, is becoming more complex. It needs to coordinate wide-area heterogeneous control resources and respond to various fault disturbances or multiple and multi-level control requirements. The coupled scenario of stability control strategy where multiple local or remote control measures need to issue control commands to the same or the same group of controlled objects is becoming increasingly common.

[0059] Second, the safety and stability control strategies and control devices of power systems are gradually becoming standardized and modularized.

[0060] Traditional stability control systems are typically highly customized to address localized problems.

[0061] After the new project is put into operation or the annual operation mode and the power system stability control strategy are studied, the power system stability control strategy needs to be designed or revised according to the specific operation conditions, and the power system stability control device and the power system stability control system should be newly built or upgraded accordingly.

[0062] Under the aforementioned trend of wide-area coordinated development, the overall area of ​​the power system's stability control system has become larger. Highly customized stability control strategies and devices are not conducive to unified design and local updates, and the cost of upgrading and transformation is also relatively high, making it difficult to adapt to the highly variable operating environment under the rapid development of new energy.

[0063] Therefore, there is an increasing demand for the standardization and modularization of power system safety and stability control strategies and devices. The overall hardware and software framework of the control master station of the power system safety and stability system should support "plug and play" of strategy functions as much as possible, and support the independent definition and flexible expansion of the coupling relationship of strategy functions.

[0064] Both of the above technological development trends point to a specific technological need: if multiple local or remote control strategies need to issue control commands to the same or the same group of controlled objects within the local control range in a short period of time, then a coordination mechanism that is standardized and independent of the control strategy that initiates the control command is needed to form the most advantageous overall control measures.

[0065] Among them, the remote control strategy is mainly the control strategy for the control master station of the power system's stability control system.

[0066] For example, multiple local or remote control strategies may require the power system's stabilization and control devices to be activated simultaneously or sequentially over a short period of time.

[0067] First, the final output control command of the power system stability control coordination master station should be able to ensure that the control requirements of multiple local or remote strategies are met; and on this basis, the final control quantity of the power system stability control coordination master station should be as small as possible.

[0068] Secondly, the coordination mechanism to achieve the above effects is through the unified standard interface of the power system's stability control coordination master station and the internal opposition between local or remote strategies.

[0069] It is worth noting that in practical applications, each action of a power system stability control strategy means that a second-level disturbance has occurred. When multiple strategy exit actions are taken, it exceeds the protection range of the traditional second line of defense. However, in practical applications, it is not required that the second line of defense of the power system can "prevent" such complex faults.

[0070] However, when the controlled objects of the power system's stability control coordination master station overlap, the control master station of the power system's stability control system or stability control device must make a clear definition of the final action command to ensure that the control quantity is controllable and reasonable.

[0071] In many cases, the wide-area collaborative master station has the information needed to infer the comprehensive optimal control quantity after multiple level-two faults occur.

[0072] With the development of technology, the three-tiered defense system of the power system is also gradually evolving.

[0073] Therefore, it is essential to study the coordination mechanism of coupling strategies in power systems.

[0074] However, in practical applications, there is basically no dedicated coupling strategy coordination function in current engineering practice. The most common solution to the coupling problem in power systems is to consider simultaneous or successive concurrent scenarios when designing the above-mentioned "multiple local or remote strategies" to eliminate the risk of mutual conflict or unreasonable uncoordinated control quantities. Alternatively, when there is no significant conflict and the impact is not significant, the coordination problem is ignored, and it is assumed that each strategy can run in parallel without conflict, allowing each strategy to execute independently.

[0075] Clearly, such a solution cannot meet the technical requirements under the aforementioned industry development trends: when multiple control strategies are triggered simultaneously or in succession within a short period of time, it cannot guarantee that the final control amount will neither exceed nor fall short; the coordination mechanism lacks independence, and if one strategy changes, multiple strategies coupled with it may need to respond and adjust.

[0076] Therefore, in order to solve this problem, when it is necessary to coordinate and control the safety and stability control strategy of the coupled power system, the comprehensive cumulative demand control quantity of the first target controlled object of the stability control master station of the target coupled power system can be determined at the current strategy exit time.

[0077] in,

[0078] The target coupled power system is a power system in which the control objects of the stability control strategy overlap.

[0079] The comprehensive cumulative demand control quantity of the first target controlled object of the stability control master station of the target coupled power system can be fed back at the current strategy exit time, which includes the controlled object and specific control command information of the first target controlled object of the stability control master station of the target coupled power system.

[0080] Determining the comprehensive cumulative demand control quantity of the first target controlled object of the target coupled power system's stabilization control master station at the current strategy exit time can help to better coordinate the various stabilization strategies of the target coupled power system's stabilization control master station based on the comprehensive cumulative demand control quantity of the first target controlled object of the target coupled power system's stabilization control master station at the current strategy exit time.

[0081] Step S102: Determine the control priority of the first target controlled object at the current policy exit time.

[0082] Specifically, as described above, the method provided in this application embodiment can determine the comprehensive cumulative demand control quantity of the first target controlled object of the target coupled power system's stability control master station at the current strategy exit time.

[0083] Different stabilization strategies have different priorities.

[0084] The different priorities indicate that some stabilization strategies are more urgent and need to be dealt with, while others are not so urgent and can be temporarily ignored.

[0085] Therefore, after determining the comprehensive cumulative demand control quantity of the first target controlled object at the current strategy exit time of the target coupled power system's stability control master station, the control priority of the first target controlled object at the current strategy exit time can be further determined. This allows for the determination of which stability control strategies need to be prioritized based on the priority of each stability control strategy for the first target controlled object.

[0086] Step S103: Based on the comprehensive cumulative demand control quantity and control priority of the first target controlled object, determine the action object and action quantity corresponding to the target exit strategy.

[0087] Specifically, as can be seen from the above description, the method provided in this application embodiment can, after determining the comprehensive cumulative demand control quantity of the first target controlled object of the stability control master station of the target coupled power system at the current policy exit time, further determine the control priority of the first target controlled object at the current policy exit time.

[0088] Once the control priority of the controlled object is determined, it can be determined which stability control strategies need to be processed first and which stability control strategies can be temporarily ignored. Therefore, after determining the comprehensive cumulative demand control amount of the first target controlled object of the stability control master station of the target coupled power system at the current strategy exit time, the action object and action amount corresponding to the target exit strategy can be further determined based on the comprehensive cumulative demand control amount of the first target controlled object and its control priority.

[0089] This allows for the priority mobilization of the action objects and action quantities corresponding to the target exit strategy, thereby maintaining the safety and stability of the target coupled power system.

[0090] in,

[0091] The target exit strategy is the stability control strategy that needs to be implemented at the current moment.

[0092] Step S104: Based on the action object and action quantity corresponding to the target exit strategy, execute the target exit strategy to achieve stable control of the target coupled power system.

[0093] Specifically, as described above, the method provided in this application embodiment can, after determining the comprehensive cumulative demand control amount of the first target controlled object of the target coupled power system's stability control master station at the current strategy exit time, further determine the action object and action amount corresponding to the target exit strategy based on the comprehensive cumulative demand control amount of the first target controlled object and its control priority.

[0094] The target exit strategy is determined, which may include the action object and information related to the amount of action to be performed by the action object.

[0095] Based on the target exit strategy, the corresponding action object can be invoked to execute the stability control strategy of the target coupled power system.

[0096] Therefore, after determining the action object and action quantity corresponding to the target exit strategy, the target exit strategy can be executed according to the action object and action quantity to achieve stable control of the target coupled power system, so as to ensure the safety and stability of the target coupled power system.

[0097] As can be seen from the above-described technical solutions, the method provided in this application embodiment can be used in the power system's stability control master station, especially in the wide-area collaborative stability control master station of the power system. When there are multiple coupled stability control strategies in the power system, such as the local triggering stability control strategy and the strategy for processing remote control commands, when they simultaneously and in a short period of time output action commands and act on the same group of controlled objects, the method provided in this application embodiment can achieve collaborative control of multiple stability control strategies through a coordination mechanism independent of these stability control strategies, without significantly changing the relevant strategies, or without changing other strategies after some strategies are updated. This reduces the risk of under-cutting and over-cutting when there are coupled strategies in the power system's stability control master station, reduces the design difficulty of collaborative control of stability control strategies, reduces the mutual influence of strategy and device updates, and effectively ensures that the overall control result is reasonably controlled, neither leading to excessive stability control of the power system nor causing the power system to run out of control and endanger the stability of the power system.

[0098] As described above, when it is necessary to coordinate the control of the stability control strategy of the target coupled power system, the method provided in this application embodiment can determine the comprehensive cumulative demand control quantity of the first target controlled object of the stability control master station of the target coupled power system at the current strategy exit time. The process is described below, which may include the following steps:

[0099] Step S201: Based on the control strategies of the target controlled objects of the target coupled power system's stability control master station at the current strategy exit time, determine the cumulative control demand sequence of the strategy function group of the first target controlled object.

[0100] Specifically, in practical applications, the stability control master station of the target coupled power system may have many controlled objects, and each controlled object may have multiple control strategies. Since the various control strategies may be coupled, that is, the controlled objects of multiple control strategies may overlap within the same time period.

[0101] When multiple control strategies are coupled, it is necessary to cut off each of the stability control strategies of the power system's stability control master station. To avoid excessive cutting off of each stability control strategy, the cumulative control demand sequence of the first target controlled object can be determined based on the control strategies of the target controlled object of the stability control master station of the target coupled power system at the current strategy exit time.

[0102] This allows for the determination of whether to coordinate and adjust various stabilization strategies based on the cumulative control demand sequence of the first target controlled object's strategy function group at the current strategy exit time.

[0103] Step S202: Based on the cumulative control demand sequence of the policy function group of the first target controlled object, determine the demand policy set of the first target controlled object up to the current policy exit time.

[0104] Specifically, as described above, the method provided in this application embodiment can determine the cumulative control demand sequence of the entire policy function group of the first target controlled object based on the various control policies of the target controlled object at the current policy exit time of the target coupled power system's stability control master station.

[0105] in,

[0106] The cumulative control demand sequence of the policy function of the first target controlled object can provide feedback on the relevant information of each controlled object in the first target controlled object regarding each demand policy.

[0107] Therefore, after determining the cumulative control demand sequence of the entire policy function group of the first target controlled object, the set of demand policies of the first target controlled object up to the current policy exit time can be further determined based on the cumulative control demand sequence of the entire policy function group of the first target controlled object.

[0108] This allows the strategy grouping of the first target controlled object to be determined based on its required strategy set, which helps to coordinate and control each stability control strategy according to the required strategy set of the first target controlled object.

[0109] Step S203: Based on the cumulative control demand sequence of the first target controlled object's strategy function group, the preset orthogonal set partitioning rules, and the demand strategy set of the first target controlled object, determine the strategy grouping of the first target controlled object.

[0110] Specifically, as described above, the method provided in this application embodiment can determine the cumulative control demand sequence of the entire policy function group of the first target controlled object based on the various control strategies of the target controlled object at the current policy exit time of the stability control master station of the target coupled power system. Furthermore, it can determine the set of demand policies for the first target controlled object up to the current policy exit time based on the cumulative control demand sequence of the entire policy function group of the first target controlled object.

[0111] in,

[0112] The set of demand strategies for the first target controlled object can provide feedback on the relevant information of each controlled object in the first target controlled object regarding each demand strategy.

[0113] The cumulative control demand sequence of the first target controlled object's strategy function can reflect the total control demand of the first target controlled object's strategy function within the same time period.

[0114] Understanding all the control requirements of the first target controlled object's strategy functions within the same time period helps to coordinate and control the various stabilization strategies of the first target controlled object, so as to avoid power system loss of control due to excessive disconnection of stabilization strategies.

[0115] To better coordinate various stability control strategies, after determining the cumulative control demand sequence of the strategy function group of the first target controlled object, the strategy grouping of the first target controlled object can be further determined based on the cumulative control demand sequence of the strategy function group of the first target controlled object, the preset orthogonal set partitioning rules, and the demand strategy set of the first target controlled object.

[0116] in,

[0117] The pre-defined orthogonal set partitioning rule may include the following:

[0118] The stability problems solved by the strategies for each control requirement of the first target controlled object in the preset orthogonal set up up to the current strategy exit time have no overlap.

[0119] The preset orthogonal set may be included in the demand strategy set of the first target controlled object.

[0120] This allows for coordinated control of various stability control strategies based on the strategy grouping of the first target controlled object.

[0121] Step S204: Determine the comprehensive cumulative demand control amount of the first target controlled object based on the strategy grouping of the first target controlled object.

[0122] Specifically, as described above, the method provided in this application embodiment can determine the set of demand strategies for the first target controlled object up to the current policy exit time.

[0123] in,

[0124] The set of demand strategies for the first target controlled object includes at least one stabilization strategy for the demand of the first target controlled object.

[0125] After determining the set of demand strategies for the first target controlled object up to the current policy exit time, the policy grouping of the first target controlled object can be further analyzed to determine the comprehensive cumulative demand control amount of the first target controlled object.

[0126] In practical applications, the comprehensive cumulative demand control quantity of the first target controlled object can be determined by referring to the stability control requirements of the target coupled power system and combining the strategy grouping of the first target controlled object.

[0127] As can be seen from the above-described technical solutions, the method provided in this application embodiment can determine the comprehensive cumulative demand control quantity of the first target controlled object of the stability control master station of the target coupled power system at the current strategy exit time when it is necessary to coordinate the control of the stability control strategy of the target coupled power system. This allows for coordinated control of various stability control strategies based on the comprehensive cumulative demand control quantity of the first target controlled object of the stability control master station of the target coupled power system, thereby ensuring the stability of the target coupled power system.

[0128] As described above, when it is necessary to coordinate the control strategy of a target coupled power system, the method provided in this application embodiment can determine the control priority of the first target controlled object at the current strategy exit time. The process is described below, and it may include the following steps:

[0129] Step S301: Determine the latest control policy received by the first target controlled object based on the current policy exit time.

[0130] Specifically, in practical applications, the active control of power system stability can include multiple controlled objects, and each controlled object can receive demand information from multiple stability control strategies.

[0131] Each stabilization strategy has its own priority, and the execution priority of different stabilization strategies varies at different times.

[0132] The latest control strategy received by the first target controlled object should be the most urgent stabilization strategy that the first target controlled object needs to handle.

[0133] Therefore, in order to determine the control priority of the first target controlled object, the latest control policy received by the first target controlled object can be determined based on the current policy exit time.

[0134] Step S302: Determine the control priority of the latest control policy received by the first target controlled object as the control priority of the first target controlled object at the current policy exit time.

[0135] Specifically, as described above, the method provided in this application embodiment can determine the latest control policy received by the first target controlled object based on the current policy exit time.

[0136] The latest control strategy received by the first target controlled object is generally the stabilization strategy that the first target controlled object needs to process at the current exit strategy time.

[0137] Therefore, after determining the latest control policy received by the first target controlled object based on the current policy exit time, the control priority of the latest control policy received by the first target controlled object can be further determined as the control priority of the first target controlled object at the current policy exit time.

[0138] As can be seen from the technical solutions described above, the method provided in this application, after determining the latest control policy received by the first target controlled object based on the current policy exit time, can further determine the control priority of the latest control policy received by the first target controlled object as the control priority of the first target controlled object at the current policy exit time. This allows for coordinated control of various stability control strategies based on the control priority of the first target controlled object at the current policy exit time, thereby ensuring the stability of the target coupled power system.

[0139] As described above, when it is necessary to coordinate the control of the stability control strategy of the target coupled power system, the method provided in this application embodiment can determine the action object and action quantity corresponding to the target exit strategy based on the comprehensive cumulative demand control quantity and control priority of the first target controlled object. The process is described below, and it may include the following steps:

[0140] Step S401: Determine the action object corresponding to the target exit strategy based on the control priority of the first target controlled object.

[0141] Specifically, in practical applications, the controlled object can receive multiple stabilization strategies, and each stabilization strategy can include multiple action objects.

[0142] Therefore, in order to determine the action object and action amount corresponding to the target exit strategy at the current exit strategy moment, the action object corresponding to the target exit strategy can be determined based on the control priority of the first target controlled object.

[0143] This allows the corresponding action object to be invoked to execute the corresponding action amount based on the action object corresponding to the target exit strategy, thereby ensuring the stability of the target coupled power system.

[0144] Step S402: Based on the comprehensive cumulative control quantity and control priority of the first target controlled object and the action object corresponding to the target exit strategy, determine the action quantity corresponding to the target exit strategy.

[0145] Specifically, as can be seen from the above description, the method provided in this application embodiment can determine the action object corresponding to the target exit strategy based on the control priority of the first target controlled object.

[0146] In practical applications, after determining the action object corresponding to the target exit strategy, it is also necessary to determine the amount of action that the action object corresponding to the target exit strategy needs to perform.

[0147] As can be seen from the above description, the method provided in this application embodiment can determine the comprehensive cumulative control quantity and control priority of the first target controlled object. Therefore, after determining the action object corresponding to the target exit strategy, the action quantity corresponding to the target exit strategy can be further determined based on the comprehensive cumulative control quantity and control priority of the first target controlled object and the action object corresponding to the target exit strategy.

[0148] This allows the action object corresponding to the target exit strategy to be activated based on the comprehensive cumulative control quantity and control priority of the first target controlled object, and the action quantity corresponding to the target exit strategy to be executed, so as to ensure the stability of the target coupled power system.

[0149] As can be seen from the technical solutions described above, the method provided in this application embodiment can determine the action object and action quantity corresponding to the target exit strategy based on the comprehensive cumulative demand control quantity and control priority of the first target controlled object, so as to mobilize the action object corresponding to the target exit strategy and execute the action quantity corresponding to the target exit strategy based on the comprehensive cumulative control quantity and control priority of the first target controlled object, thereby ensuring the stability of the target coupled power system.

[0150] As described above, when it is necessary to coordinate the control of the stability control strategy of the target coupled power system, the method provided in this application embodiment can determine the action quantity corresponding to the target exit strategy based on the comprehensive cumulative control quantity and control priority of the first target controlled object and the action object corresponding to the target exit strategy. The process is described below, and it may include the following steps:

[0151] Step S501: Determine whether the state of the first target controlled object is uncuttable at a preset time before the target exit strategy time.

[0152] Specifically, in practical applications, although the target exit strategy at the time of the target exit strategy has been determined, for safety reasons and to avoid accidentally switching each stabilization strategy, it is possible to further determine whether the state of the first target controlled object is unswitching at a preset time before the time of the target exit strategy.

[0153] If, at a preset time before the target exit policy time, there is a controlled object in the first target controlled object whose state is uncuttable, it means that at the preset time before the target exit policy time, there is a controlled object in the first target controlled object whose state is uncuttable and cannot be controlled, and it needs to be deleted. Then step S502 can be executed.

[0154] Step S502: At a preset time before the target exit strategy time, delete the controlled object in the first target controlled object whose state is uncuttable to obtain the second target controlled object.

[0155] Specifically, as described above, the method provided in this application embodiment can determine whether there is a controlled object in the first target controlled object with an uncuttable state at a preset time before the target exit policy time. If there is a controlled object in the first target controlled object with an uncuttable state at the preset time before the target exit policy time, it means that there is a controlled object in the first target controlled object with an uncuttable state that needs to be deleted at the preset time before the target exit policy time. Therefore, the controlled object in the first target controlled object with an uncuttable state at the preset time before the target exit policy time can be deleted, thereby obtaining the second target controlled object.

[0156] in,

[0157] To avoid fluctuations in the controllable state during power system faults, the controllable quantities of each object in the priority sequence of controlled objects can be taken as the time segment value corresponding to the first 200ms before the device starts up.

[0158] The preset timing can be set in conjunction with the stability control status of the target coupled power system's main control station;

[0159] For example, the preset time can be set to any time between the target exit strategy time and 200 milliseconds before the target exit strategy time.

[0160] For example,

[0161] The time segment 200ms before the target exit strategy action can be taken to monitor the switchable state of the first target controlled object. Controlled objects in the first target controlled object whose state is unswitchable can be deleted from the control priority sequence without consideration.

[0162] Step S503: Based on the difference between the comprehensive cumulative control quantity of the first target controlled object and the control quantity completed before the target exit strategy time, determine the new demand control quantity of the second target controlled object as the action quantity corresponding to the target exit strategy.

[0163] Specifically, as described above, the method provided in this application embodiment can delete the controlled object in the first target controlled object whose state is uncuttable at a preset time before the target exit strategy time, and obtain the second target controlled object.

[0164] The second target controlled object can be a controlled object that needs to be adjusted.

[0165] After identifying the second controlled object, the new demand control quantity of the second controlled object can be determined as the action quantity corresponding to the target exit strategy based on the difference between the comprehensive cumulative control quantity of the first target controlled object and the control quantity completed before the target exit strategy time.

[0166] Once the comprehensive cumulative control amount of the second target controlled object is determined, various stability control strategies can be coordinated based on the comprehensive cumulative control amount of the second target controlled object.

[0167] As can be seen from the technical solutions described above, the method provided in this application embodiment can determine the action quantity corresponding to the target exit strategy based on the comprehensive cumulative control quantity and control priority of the first target controlled object and the action object corresponding to the target exit strategy, so as to execute the corresponding stability control strategy based on the action quantity corresponding to the target exit strategy, thereby ensuring the stability of the target coupled power system.

[0168] The following example illustrates the implementation method of this application.

[0169] Assuming that, up to the current policy exit time, multiple policies of a power system's stability control master station collectively form a sequence of cumulative control demand for the same group of controlled objects:

[0170]

[0171] in,

[0172] S k This can represent the cumulative control demand sequence of the entire group of policy functions for the same group of controlled objects, formed by multiple strategies of the power system's stability control master station.

[0173] i can represent the sequence number of the control request made by the power system's main control station to the controlled objects in the entire time period;

[0174] C i It can represent a demander strategy flag, indicating which strategy the i-th control demand for the group of controlled objects comes from;

[0175] DP i c This can represent the strategy function C. i The cumulative control quantity of the entire group of functions proposed by the power system's stability control master station in the i-th control requirement of the group of controlled objects;

[0176] k represents the number of times the power system's stability control master station has made control requests to the controlled objects within the entire time frame up to the current strategy exit time.

[0177] For example:

[0178] S2 = {{(300MW, DC blockade load shedding), (100MW, load shedding due to a certain N-2 AC fault)},

[0179] (Load shedding due to an N-2 AC fault), (100MW, multiple DC coordinated turbine shedding)

[0180] Step 1: Determine the comprehensive cumulative demand control quantity of the same group of controlled objects at the current strategy exit time of the power system's stability control master station.

[0181] Let DP k This represents the total cumulative control amount of the entire control group of the power system's stability control master station when it makes the k-th control request for the group of controlled objects.

[0182] Therefore, the comprehensive cumulative demand control quantity of the controlled objects at the power system's stability control master station can be represented as a mapping:

[0183]

[0184] in,

[0185] The comprehensive cumulative demand control quantity of the controlled objects at the g1 power system's stability control master station, together with the multiple strategies of the power system's stability control master station, forms a mapping relationship for the entire cumulative control demand sequence of the strategy functions for the same group of controlled objects.

[0186] To simplify the problem, based on the actual situation in most applications, we can make two assumptions:

[0187] First, DP k It only relates to the strategy with the largest cumulative cut amount proposed multiple times for each relevant strategy;

[0188] Second, DP k It is independent of the order in which the strategies within the group make control requests to the controlled objects in that group.

[0189] Under the above assumptions, the input information structure of the coordination mechanism can be simplified.

[0190] Multiple strategies at the power system's stability control master station can be combined to form a sequence of cumulative control demand for the same group of controlled objects, as detailed below:

[0191]

[0192] in,

[0193] Ω k S can be represented k The simplified form;

[0194] in,

[0195] DP k,j It can represent the strategy that forms a control demand for the group of controlled objects. Up to the current strategy exit time, that is, the time when the power system's main control station makes the kth control demand for the group of controlled objects within the whole time, it is the largest of the cumulative demand made within the whole group.

[0196] N c It can represent the number of strategies within the group that have control requirements for the controlled objects in the group up to the current strategy exit time.

[0197] Therefore, a mapping of the comprehensive cumulative demand control quantity of the controlled object at the power system's stability control master station can be represented by f1, which satisfies the following:

[0198] f1(Ω k )=g1(S k ) = DP k (4)

[0199] To better coordinate various stability control strategies, the mapping relationship of the comprehensive cumulative demand control quantity of the controlled object of the power system stability control master station proposed in this application embodiment is a mapping relationship based on the orthogonality between strategies.

[0200] make:

[0201]

[0202] in,

[0203] C k It can represent the set of the aforementioned demander strategies up to the current exit point of the strategy;

[0204] k, N c j can be defined as before;

[0205] C k,j It can represent the j-th strategy that, up to the current exit time, creates a control requirement for this group of controlled objects.

[0206] For set A,

[0207]

[0208] If each of C in set A k,j If the corresponding strategies solve no common stable problems, then set A is called an orthogonal set.

[0209] You can set a set ζ k It is set C k The set C is a subset family consisting of all orthogonal subsets of . kAll orthogonal subsets include the empty set.

[0210] C can be defined k nonnegative weight function W on k :C k →R + The following conditions must be met:

[0211]

[0212] Therefore, M can be used k =(C k ,ξ k W k ), represents the input and internal structure of the mapping relationship of the comprehensive cumulative demand control quantity of the controlled objects of the power system's stability control master station.

[0213] For example,

[0214] Set A = {strategies for solving the power angle stability problem of a power plant, strategies for solving the overload problem of a certain line} is an orthogonal set;

[0215] The set A = {lock-in switching strategies for solving frequency problems, high-frequency triggered switching strategies} is not an orthogonal set;

[0216] but:

[0217] A = {Strategies for solving the power angle stability problem of power plant a and the overload problem of line m, and strategies for solving the power angle stability problem of power plant a and the overload problem of line n} is not an orthogonal set;

[0218] set up It is for C k A division,

[0219] in,

[0220] It is an orthogonal set;

[0221] m is the number of subsets in the partition.

[0222] Assume that:

[0223]

[0224] in,

[0225] It can be a pair of f1 and p k The relevant feasible solutions.

[0226] In other words, a feasible solution for f1 first divides all demander strategies into several groups, ensuring that the strategies within each group are orthogonal. Then, after taking the largest cumulative control demand within each group, the sum of the strategies across all groups is used as the output DP. k ;

[0227] One grouping method corresponds to one feasible solution.

[0228] The underlying assumption is:

[0229] If two strategies addressing completely different problems simultaneously issue control requests to the same set of controlled objects, the same control amount can satisfy both control objectives at the same time. However, if the two strategies solve overlapping problems and are triggered simultaneously, a conservative approach is to superimpose the control amounts to resolve the stability issues arising from the overlap. This principle can be applied to... Figure 2 illustrate.

[0230] like Figure 2 As shown:

[0231] Assumption:

[0232] The effect of fault 1 on the decrease in stability index is represented by vector d1;

[0233] The effect of fault 2 on the decrease in stability index is represented by vector d2;

[0234] The effect of two faults occurring simultaneously and successively within the group is represented by the vector d.

[0235] Stability control strategy 1 is triggered by fault 1. In order to correct d1, one or a group of controlled objects need to act. Its correction effect is represented by vector c1. Vector correction means that d1+c1 falls in the first quadrant.

[0236] Stability control strategy 2 is triggered by fault 2. To correct d2, it requires the same or a group of controlled objects to act, and its corrective effect is represented by vector c2. The dashed arrow is the vector after rotating the solid arrow of the same color by 180 degrees.

[0237] exist Figure 2 In the left-hand diagram, strategies 1 and 2 are orthogonal. Therefore, the larger of c1 and c2, i.e., c2, can simultaneously correct d1 and d2. That is, the comprehensive control quantity is the larger of the control quantities required by the two strategies.

[0238] exist Figure 2 In the diagram on the right, strategies 1 and 2 are not orthogonal. In extreme cases, they are completely in the same direction. To correct d1 and d2, a correction action c = c1 + c1 needs to be applied, which is the sum of the demand control quantities of the two strategies based on the comprehensive control quantity.

[0239] The angles d1, d2, c1, and c2 in the figure are for illustrative purposes only and are not actually defined quantitatively.

[0240] Figure 2 The diagram on the right shows the extreme case when it is not orthogonal. In the case of non-orthogonality, we should conservatively consider the comprehensive control quantity based on this extreme case, that is, it is better to exceed than to fall short.

[0241] Therefore, f1 in the coupling strategy function control requirement coordination mechanism can be taken as It can satisfy:

[0242]

[0243] In other words, the choice makes The smallest partition p in the middle k* The minimum value is used as the comprehensive cumulative control quantity DP. k .

[0244] The above optimization problem can be modeled as an integer programming problem, in C k When the number of stabilization strategies is not too large, the solution is not difficult.

[0245] Step 2: Determine the control priority of the same group of controlled objects at the power system's stability control master station;

[0246] Different strategies may have different control priorities for a set of controlled objects. In this experiment, the overall control priority scheme is: the control priority of the current exit action strategy.

[0247] Step 3: Determine the target and amount of the current output action of the power system's stability control master station.

[0248] Step 2 has determined the control priority of the same group of controlled objects at the power system's stability control master station. Taking the 200ms time segment before this strategy action, the switchable status of the same group of controlled objects at the power system's stability control master station is monitored, and unswitchable controlled objects are removed from the control priority sequence.

[0249] Comprehensive cumulative demand control quantity DP k Subtracting the control quantities already implemented within the entire group yields the new action quantities required for this actual situation. To avoid fluctuations in the controllable state during a fault, the controllable quantities of each controlled object in the priority sequence are taken as the time segment value of the power system's stability control device 200ms before the entire group is started.

[0250] The advantages of obtaining comprehensive demand control quantities through online optimization will be explained next with an example.

[0251] set up

[0252]

[0253] There are three feasible partitions that satisfy the above formula (6):

[0254] p1 k ={{Strategy 1, Strategy 3},{Strategy 2}}

[0255] p2 k ={{strategy1},{strategy2, strategy3}}

[0256] p3 k ={{strategy1},{strategy2, strategy3}}

[0257] Then the expression for f1 can be:

[0258] f 1，1 (Ω k ) = DP k,1 +DP k,2 +DP k,3

[0259] f 1,2 (Ω k ) = DP k,1 +DP k,2 +DP k,3 ;

[0260] f 1，3 (Ω k ) = DP k,1 +max{DP k,2 ,DP k,3}

[0261] f 1，1 (Ω k The value is always the largest, and without utilizing orthogonality, offline analysis will not choose f. 1，1 As F1.

[0262] Regardless of whether offline analysis is selected f 1,2 or f 1，3 All of these are reasonable and feasible, but for the variable Ω k None of these methods can guarantee that the cutting amount will be minimized under reasonable conditions.

[0263] For example when Ω k When f = {200, 50, 100}, we have f 1,2 (Ω k )<f 1，3 (Ω k );

[0264] And when Ω k When f = {50, 200, 100}, we have f 1,2 (Ω k )>f 1，3 (Ω k ).

[0265] Step 4: Based on the target and amount of the current output action of the power system's stability control master station, execute the current output strategy to achieve stable control of the power system.

[0266] The following describes the coupled power system stability control strategy collaborative control device provided in the embodiments of this application. The coupled power system stability control strategy collaborative control device described below and the coupled power system stability control strategy collaborative control method described above can be referred to in correspondence.

[0267] See Figure 3 , Figure 3 This is a schematic diagram of a coupled power system stability control strategy collaborative control device disclosed in an embodiment of this application.

[0268] like Figure 3 As shown, the coupled power system stability control strategy collaborative control device may include:

[0269] The first demand control quantity determination unit 101 is used to determine the comprehensive cumulative demand control quantity of the first target controlled object of the target coupled power system stability control master station at the current strategy exit time.

[0270] The first control priority determination unit 102 is used to determine the control priority of the first target controlled object at the current policy exit time.

[0271] The target exit strategy determination unit 103 is used to determine the action object and action quantity corresponding to the target exit strategy based on the comprehensive cumulative demand control quantity of the first target controlled object and its control priority.

[0272] The execution unit 104 is used to execute the target exit strategy according to the action object and action amount corresponding to the target exit strategy in order to achieve stable control of the target coupled power system.

[0273] As can be seen from the above-described technical solutions, when it is necessary to coordinate the control of various safety and stability control strategies of a coupled power system, the device provided in this application embodiment can determine the comprehensive cumulative demand control quantity of the first target controlled object of the target coupled power system's stability control master station at the current strategy exit time; and determine the control priority of the first target controlled object at the current strategy exit time; so that the action object and action quantity corresponding to the target exit strategy can be determined based on the comprehensive cumulative demand control quantity and control priority of the first target controlled object; so that the target exit strategy can be executed based on the action object and action quantity corresponding to the target exit strategy to achieve stable control of the target coupled power system.

[0274] The device provided in this application embodiment can be used in the power system stability control master station, especially in the wide-area collaborative stability control master station of the power system. When there are multiple coupled stability control strategies in the power system, such as the local triggering stability control strategy and the strategy for processing remote control commands, when they simultaneously and in a short period of time output action commands and act on the same group of controlled objects, the method provided in this application embodiment can achieve the collaborative control of multiple stability control strategies through a coordination mechanism independent of these stability control strategies, without changing the relevant strategies or without changing other strategies after some strategies are updated. This reduces the risk of under-cutting and over-cutting when there are coupled strategies in the power system stability control master station, reduces the design difficulty of collaborative control of stability control strategies, reduces the mutual influence of strategy and device updates, and effectively ensures that the overall control result is controlled and reasonable, neither leading to excessive stability control of the power system nor causing the power system to run out of control and endanger the stability of the power system.

[0275] Further optionally, the first demand control quantity determination unit 101 may include:

[0276] The first determining unit is used to determine the cumulative control demand sequence of the strategy function group of the first target controlled object based on the various control strategies of the target controlled object of the stability control master station of the target coupled power system at the current strategy exit time.

[0277] The second determining unit is used to determine the set of demand strategies for the first target controlled object up to the current strategy exit time, based on the cumulative control demand sequence of the strategy function group of the first target controlled object.

[0278] The third determining unit is used to determine the strategy grouping of the first target controlled object based on the cumulative control demand sequence of the strategy function group of the first target controlled object, the preset orthogonal set partitioning rules, and the demand strategy set of the first target controlled object.

[0279] The fourth determining unit is used to determine the comprehensive cumulative demand control amount of the first target controlled object based on the strategy grouping situation of the first target controlled object.

[0280] Further optionally, the aforementioned first control priority determination unit 102 may include:

[0281] The fifth determining unit is used to determine the latest control policy received by the first target controlled object based on the current policy exit time;

[0282] The sixth determining unit is used to determine the control priority of the latest control policy received by the first target controlled object as the control priority of the first target controlled object at the current policy exit time.

[0283] Further optionally, the aforementioned target export strategy determination unit 103 may include:

[0284] The seventh determining unit is used to determine the action object corresponding to the target exit strategy based on the control priority of the first target controlled object;

[0285] The eighth determining unit is used to determine the action quantity corresponding to the target exit strategy based on the comprehensive cumulative control quantity and control priority of the first target controlled object and the action object corresponding to the target exit strategy.

[0286] Further optionally, the eighth determining unit mentioned above may include:

[0287] The judgment unit is used to determine whether the state of the first target controlled object is uncuttable at a preset time before the target exit strategy time.

[0288] The cut-off unit is used to delete the controllable object in the first target controlled object whose state is uncuttable at a preset time before the target exit policy time when the execution result of the judgment unit is determined to be that there is a controllable object in the first target controlled object whose state is uncuttable at the preset time before the target exit policy time, so as to obtain the second target controlled object.

[0289] The ninth determining unit is used to determine the new demand control quantity of the second target controlled object as the action quantity corresponding to the target exit strategy based on the difference between the comprehensive cumulative control quantity of the first target controlled object and the control quantity completed before the target exit strategy time.

[0290] Further optionally, the fourth determining unit described above, based on a preset orthogonal set partitioning rule, may include:

[0291] The stability problems solved by the strategies for each control requirement of the first target controlled object in the preset orthogonal set up up to the current strategy exit time have no overlap.

[0292] The preset orthogonal set is included in the demand strategy set of the first target controlled object.

[0293] Further, optionally, the preset time mentioned above is the time corresponding to the target exit strategy time up to the 200th millisecond before the target exit strategy time.

[0294] The specific processing flow of each unit included in the above-mentioned coupled power system stability control strategy collaborative control device can be referred to the relevant introduction in the section on coupled power system stability control strategy collaborative control method above, and will not be repeated here.

[0295] The coupled power system stability control strategy collaborative control device provided in this application embodiment can be applied to coupled power system stability control strategy collaborative control equipment, such as terminals: mobile phones, computers, etc. Optionally, Figure 4 The hardware structure block diagram of the coordinated control device for the stability control strategy of coupled power systems is shown. (Refer to...) Figure 4 The hardware structure of the coupled power system stability control strategy collaborative control device may include: at least one processor 1, at least one communication interface 2, at least one memory 3, and at least one communication bus 4.

[0296] In this embodiment, the number of processor 1, communication interface 2, memory 3, and communication bus 4 is at least one, and processor 1, communication interface 2, and memory 3 communicate with each other through communication bus 4.

[0297] Processor 1 may be a central processing unit (CPU), an application-specific integrated circuit (ASIC), or one or more integrated circuits configured to implement the embodiments of this application.

[0298] Memory 3 may include high-speed RAM, and may also include non-volatile memory, such as at least one disk storage device;

[0299] The memory stores a program, which the processor can call. The program is used to implement the various processing flows in the aforementioned terminal-coupled power system stability control strategy collaborative control scheme.

[0300] This application embodiment also provides a readable storage medium that can store a program suitable for processor execution, the program being used to: implement the various processing flows of the aforementioned terminal in the coordinated control scheme of the coupled power system stability control strategy.

[0301] Finally, it should be noted that in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.

[0302] The various embodiments in this specification are described in a progressive manner, with each embodiment focusing on the differences from other embodiments. The same or similar parts between the various embodiments can be referred to each other.

[0303] The above description of the disclosed embodiments enables those skilled in the art to make or use this application. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of this application. Various embodiments can be combined with each other. Therefore, this application is not to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A coordinated control method for a coupled power system stability control strategy, characterized in that, include: Determine the comprehensive cumulative demand control quantity of the first target controlled object of the target coupled power system's stability control master station at the current strategy exit moment; Determine the control priority of the first target controlled object at the current policy exit time; Based on the comprehensive cumulative demand control quantity and control priority of the first target controlled object, determine the action object and action quantity corresponding to the target exit strategy; Based on the action object and action quantity corresponding to the target exit strategy, the target exit strategy is executed to achieve stable control of the target coupled power system; The determination of the comprehensive cumulative demand control quantity of the first target controlled object of the target coupled power system's stability control master station at the current strategy exit moment includes: Based on the control strategies of each target controlled object of the target coupled power system's stability control master station at the current strategy exit time, determine the cumulative control demand sequence of the entire strategy function group of the first target controlled object; Based on the cumulative control demand sequence of the policy function group of the first target controlled object, determine the set of demand policies of the first target controlled object up to the current policy exit time; Based on the cumulative control demand sequence of the first target controlled object's strategy function group, the preset orthogonal set partitioning rules, and the demand strategy set of the first target controlled object, the strategy grouping of the first target controlled object is determined. Based on the strategy grouping of the first target controlled object, determine the comprehensive cumulative demand control amount of the first target controlled object.

2. The method according to claim 1, characterized in that, Determining the control priority of the first target controlled object at the current policy exit time includes: Based on the current policy exit time, determine the latest control policy received by the first target controlled object; The control priority of the latest control policy received by the first target controlled object is determined as the control priority of the first target controlled object at the current policy exit time.

3. The method according to claim 1, characterized in that, The step of determining the action object and action quantity corresponding to the target exit strategy based on the comprehensive cumulative demand control quantity and control priority of the first target controlled object includes: Based on the control priority of the first target controlled object, determine the action object corresponding to the target exit strategy; Based on the comprehensive cumulative control quantity and control priority of the first target controlled object and the action object corresponding to the target exit strategy, the action quantity corresponding to the target exit strategy is determined.

4. The method according to claim 3, characterized in that, The step of determining the action quantity corresponding to the target exit strategy based on the comprehensive cumulative control quantity and control priority of the first target controlled object and the action object corresponding to the target exit strategy includes: Determine whether the state of the first target controlled object is uncuttable at a preset time before the target exit strategy time; If, at a preset time before the target exit policy time, there is a controlled object in the first target controlled object whose state is uncuttable, then the controlled object in the first target controlled object whose state is uncuttable at the preset time before the target exit policy time will be deleted to obtain the second target controlled object. Based on the difference between the comprehensive cumulative control quantity of the first target controlled object and the control quantity completed before the target exit strategy time, the new demand control quantity of the second target controlled object is determined as the action quantity corresponding to the target exit strategy.

5. The method according to claim 1, characterized in that, The method of partitioning according to a preset orthogonal set rule includes: The stability problems solved by the strategies for each control requirement of the first target controlled object in the preset orthogonal set up up to the current strategy exit time have no overlap. The preset orthogonal set is included in the demand strategy set of the first target controlled object.

6. The method according to claim 4, characterized in that, The preset time is the time corresponding to the target exit strategy time up to the 200th millisecond before the target exit strategy time.

7. A coordinated control device for a coupled power system stability control strategy, characterized in that, include: The first demand control quantity determination unit is used to determine the comprehensive cumulative demand control quantity of the first target controlled object of the target coupled power system's stability control master station at the current strategy exit time. The first control priority determination unit is used to determine the control priority of the first target controlled object at the current policy exit time. The target exit strategy determination unit is used to determine the action object and action quantity corresponding to the target exit strategy based on the comprehensive cumulative demand control quantity of the first target controlled object and its control priority. An execution unit is used to execute the target exit strategy according to the action object and action quantity corresponding to the target exit strategy in order to achieve stable control of the target coupled power system. The first demand control quantity determination unit is specifically used to determine the cumulative control demand sequence of the strategy function group of the first target controlled object based on the various control strategies of the target controlled object of the target coupled power system's stability control master station at the current strategy exit time. Based on the cumulative control demand sequence of the policy function group of the first target controlled object, determine the set of demand policies of the first target controlled object up to the current policy exit time; Based on the cumulative control demand sequence of the first target controlled object's strategy function group, the preset orthogonal set partitioning rules, and the demand strategy set of the first target controlled object, the strategy grouping of the first target controlled object is determined. Based on the strategy grouping of the first target controlled object, determine the comprehensive cumulative demand control amount of the first target controlled object.

8. A coordinated control device for a coupled power system stability control strategy, characterized in that, include: One or more processors, and memory; The memory stores computer-readable instructions, which, when executed by the one or more processors, implement the steps of the coordinated control method for the coupled power system stability control strategy as described in any one of claims 1 to 6.

9. A readable storage medium, characterized in that: The readable storage medium stores computer-readable instructions, which, when executed by one or more processors, cause the one or more processors to implement the steps of the coordinated control method for the coupled power system stability control strategy as described in any one of claims 1 to 6.

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