Event-triggered dual-mode regional interconnected grid collaborative AGC control method and system

Abstract

The application discloses an event-triggered dual-mode regional interconnected power grid cooperative AGC control method and system, which is applied to an interconnected power grid comprising multiple control regions, and the method comprises the following steps: acquiring the operation state quantity of each control region in real time, and constructing an event-triggered index; when the event-triggered index meets a preset triggering condition, and the total available reserve capacity meets a preset condition relative to a disturbance power shortage, the disturbance power shortage is distributed as an original support quantity of each control region; the original support quantity of the remaining control regions except the main disturbance region is corrected to obtain the safe support quantity of the remaining control regions, and the additional support quantity of various frequency modulation resources in the remaining control regions is determined, the local control quantity of the corresponding frequency modulation resources of the local AGC closed-loop control output of the main disturbance region is superposed, and the final control quantity of the various frequency modulation resources is generated. The application avoids interference to normal frequency regulation, does not need to change the local control structure which has been stably operated, and is easy to implement.

Description

Technical Field

[0001] This invention belongs to the field of power system technology, specifically relating to an event-triggered dual-mode regional interconnected power grid collaborative AGC control method and system. Background Technology

[0002] With the large-scale integration of new energy sources and the increasing electronic characteristics of power grids, modern interconnected power grids are exhibiting trends of low inertia, weak damping, and declining frequency response. When large-power deficit disturbances occur, such as large-capacity DC blocking or large-unit tripping, the system frequency will drop rapidly, posing a serious threat to power grid security.

[0003] Currently, interconnected power grids generally employ a hierarchical AGC (Automatic Generation Control) strategy. Each control area calculates the Area Control Error (ACE) based on its local frequency and tie-line power deviation, and uses a local PID or PI controller to drive frequency regulation resources to eliminate ACE. This traditional "local negative feedback" main closed-loop structure is clear and stable, forming the cornerstone of power grid frequency control. However, its limitations are as follows: error-driven PID control is insufficient in responding to rapid frequency drops at the initial stage of large disturbances, making it difficult to effectively suppress the lowest frequency point; each control area regulates independently within its local closed loop, lacking rapid and organized cross-regional coordinated support in emergencies, and failing to fully utilize the grid's reserve capacity; furthermore, without organized cross-regional support, the support power may cause tie-line power flow to exceed limits, triggering cascading failures.

[0004] To address the aforementioned issues, existing methods, such as proposing complex global optimization models or designing entirely new nonlinear controllers to replace the original AGC, are often difficult to promote and apply in practical engineering due to heavy computational burden, difficulty in parameter tuning, or disruption of the convergence of the original stable closed loop. Summary of the Invention

[0005] To address the aforementioned problems in the existing technology, this invention provides an event-triggered dual-mode regional interconnected power grid cooperative AGC control method and system. The technical problem to be solved by this invention is achieved through the following technical solution: In a first aspect, the present invention provides an event-triggered dual-mode regional interconnected power grid cooperative AGC control method, applied to an interconnected power grid comprising multiple control regions, the method comprising: The operating status data of each control area is acquired in real time, and event triggering indicators are constructed based on the operating status data. When the event triggering indicator meets the preset triggering condition and the total available reserve capacity meets the preset reserve condition relative to the disturbance power deficit, the disturbance power deficit is allocated as the original support amount for each of the control areas. With the safe operation of the tie line as a constraint, the original support amount of the remaining control areas outside the main disturbance area is corrected to obtain the safe support amount of the remaining control areas; the main disturbance area is the control area with a disturbance power deficit. Based on the safety support amount of the remaining control areas, determine the additional support amount of various frequency modulation resources in the remaining control areas allocated to the main disturbance area; Based on the additional support amount allocated to the main disturbance region by various frequency modulation resources in the remaining control regions and the local control amount of various frequency modulation resources in the main disturbance region, the final control amount of various frequency modulation resources in the main disturbance region is generated.

[0006] In one embodiment of the present invention, the step of acquiring the operating status quantities of each control region in real time and constructing event triggering indicators based on the operating status quantities includes: Real-time acquisition of frequency deviation, tie-line power deviation and active power output changes in each control region; The center frequency deviation of the interconnected power grid is determined based on the frequency deviation of each of the control areas; The rate of change of the center frequency is determined based on the rate of change of the center frequency deviation. The regional control error of each control region is determined based on the frequency deviation and tie-line power deviation of each control region. An event trigger index is constructed based on the center frequency deviation, the center frequency change rate, the active power output change in the main disturbance region, the regional control error of each control region, and the tie-line power deviation.

[0007] In one embodiment of the present invention, before the step of allocating the disturbance power deficit to the original support amount of each of the control regions according to a preset allocation rule when the event triggering index meets a preset triggering condition and the total available reserve capacity meets a preset reserve condition relative to the disturbance power deficit, the method further includes: Determine whether the event trigger indicator is greater than or equal to the trigger threshold; if not, output the event trigger signal. ; If so, output the event trigger signal. Furthermore, it determines whether the total available reserve capacity of the interconnected power grid is greater than or equal to the product of the disturbance power deficit and the reserve safety factor; if not, it outputs a reserve availability decision signal. If so, output a standby decision signal. .

[0008] In one embodiment of the present invention, when the event triggering indicator meets a preset triggering condition and the total available reserve capacity meets a preset reserve condition relative to the disturbance power deficit, the step of allocating the disturbance power deficit as the original support amount for each of the control regions includes: When the event trigger signal And the backup available decision signal At that time, the product of the disturbance power deficit and the first preset allocation ratio corresponding to each control region is calculated to obtain the original support amount to allocate the disturbance power deficit to each control region; wherein, the sum of the first preset allocation ratios corresponding to each control region is 1, and the first preset allocation ratio corresponding to the main disturbance region is greater than the first preset allocation ratios corresponding to the other control regions.

[0009] In one embodiment of the present invention, the step of correcting the original support amount of the remaining control areas outside the main disturbance area, with the safe operation of the tie line as a constraint, to obtain the safe support amount of the remaining control areas, includes: Calculate the power flow distribution factor of tie-line power for each remaining control area power injection variation; Based on the original support amount and power flow distribution factor of each remaining control area, predict the predicted power deviation of the tie line after the original support amount is executed; The predicted power deviation is compared with a preset safety range; When the predicted power deviation exceeds the upper limit of the preset safety range, the safety support amount is obtained by reducing the original support amount of each of the remaining control areas; when the predicted power deviation is lower than the lower limit of the preset safety range, the safety support amount is obtained by increasing the original support amount of each of the remaining control areas. When the predicted power deviation is within the preset safety range, the original support amount of the corresponding remaining control area is taken as the safety support amount of the remaining control area.

[0010] In one embodiment of the present invention, the step of determining the additional support amount allocated to the main disturbance region for various frequency modulation resources within the remaining control regions based on the safety support amount of the remaining control regions includes: The frequency difference attenuation factor is determined based on the center frequency deviation of the interconnected power grid and the preset emergency support frequency difference reference value. Multiply the safety support amount of each of the remaining control regions, the preset region support gain, and the frequency difference attenuation factor to obtain the first additional support amount of each of the remaining control regions. According to the second preset allocation ratio corresponding to various frequency regulation resources in each of the remaining control areas, as well as the ramp rate constraints and output range constraints of various frequency regulation resources, the corresponding first additional support amount is allocated to various frequency regulation resources, so as to obtain the additional support amount of various frequency regulation resources in each of the remaining control areas allocated to the main disturbance area; the frequency regulation resources include at least one of thermal power, hydropower, pumped storage and energy storage.

[0011] In one embodiment of the present invention, the step of generating the final control amount of various frequency modulation resources in the main disturbance region based on the additional support amount allocated to the main disturbance region by various frequency modulation resources in the remaining control regions and the local control amount of various frequency modulation resources in the main disturbance region includes: Local control quantities of various frequency modulation resources obtained from the local AGC closed-loop control output of the main disturbance region; The local control quantities of various frequency modulation resources within the main disturbance area are superimposed with the additional support quantities of the corresponding frequency modulation resources in the other control areas allocated to the main disturbance area to generate the final control quantities of various frequency modulation resources within the main disturbance area. The active power output of various frequency modulation resources is controlled according to the final control quantity.

[0012] In one embodiment of the present invention, before the step of obtaining the local control quantities of various frequency modulation resources of the local AGC closed-loop control output of the main disturbance region, the method further includes: The area control error of the control region is determined based on the tie-line power deviation and the frequency deviation of the control region. The regional control error is processed using a proportional-integral control law to obtain the local control quantity of the corresponding frequency modulation resource for the local AGC closed-loop control output of the control region.

[0013] Secondly, the present invention provides an event-triggered dual-mode regional interconnected power grid collaborative AGC control system, applied to an interconnected power grid containing multiple control areas, the system comprising: The indicator construction module is used to acquire the operating status quantities of each control area in real time, and construct event trigger indicators based on the operating status quantities. The original support quantity allocation module is used to allocate the disturbance power deficit as the original support quantity of each of the control areas when the event triggering index meets the preset triggering conditions and the total available reserve capacity meets the preset reserve conditions relative to the disturbance power deficit. The original support quantity correction module is used to correct the original support quantity of the remaining control areas outside the main disturbance area, with the safe operation of the tie line as a constraint, to obtain the safe support quantity of the remaining control areas; the main disturbance area is the control area with a disturbance power deficit. The additional support quantity determination module is used to determine the additional support quantity allocated to the main disturbance region by various frequency modulation resources in the other control regions based on the safety support quantity of the other control regions. The final control quantity generation module is used to generate the final control quantity of various frequency modulation resources in the main disturbance area based on the additional support quantity allocated to the main disturbance area by various frequency modulation resources in the remaining control areas and the local control quantity of various frequency modulation resources in the main disturbance area.

[0014] Thirdly, the present invention also provides a computer device, including a storage medium, a processor, and a computer program stored on the storage medium and executable on the processor, wherein the processor executes the computer program to implement the steps of the event-triggered dual-mode regional interconnected power grid cooperative AGC control method described in the first aspect.

[0015] Compared with the prior art, the beneficial effects of the present invention are as follows: 1. Based on retaining the original local AGC closed-loop control of each control area, this invention performs cross-regional collaborative support only when a large power shortage disturbance occurs and the backup is sufficient, through the dual judgment of event trigger indicators and backup availability conditions. This avoids interference with normal frequency regulation and does not require modification of the already stable local control structure. It has low engineering implementation difficulty and low deployment risk.

[0016] 2. This invention allocates the disturbance power deficit to each control area according to the priority rule of the main disturbance area, ensuring that the main disturbance area quickly receives primary power support while other control areas are supplemented. This fully utilizes the overall reserve capacity of the interconnected power grid, which is beneficial for raising the frequency minimum point after the disturbance and shortening the frequency recovery time. Simultaneously, the impact of the original support on tie-line power is predicted and corrected using the power flow distribution factor, while maintaining the original support in the main disturbance area unchanged during the correction process. This ensures that cross-regional support always remains within the safe operating boundary of the tie-line, balancing the speed of emergency frequency support with the static safety of the power grid.

[0017] 3. This invention introduces a frequency difference attenuation factor that adjusts the additional support quantity by reducing it as the center frequency deviation recovers, so that the cooperative support automatically withdraws after the frequency recovers, avoiding over-adjustment and reserve overdraft caused by the long-term action of the support quantity; the additional support quantity and the local control quantity are superimposed to form the final control quantity, and are distributed to various frequency modulation resources in proportion, giving full play to the complementary advantages of heterogeneous frequency modulation resources.

[0018] The present invention will be further described in detail below with reference to the accompanying drawings and embodiments. Attached Figure Description

[0019] Figure 1This is a flowchart illustrating an event-triggered dual-mode regional interconnected power grid collaborative AGC control method provided in an embodiment of the present invention; Figure 2 This is another flowchart illustrating the event-triggered dual-mode regional interconnected power grid collaborative AGC control method provided in this embodiment of the invention; Figure 3 This is a comparison diagram of frequencies after controlling the main disturbance region using different methods; Figure 4 This is a schematic diagram of a structure of an event-triggered dual-mode regional interconnected power grid collaborative AGC control system provided in an embodiment of the present invention; Figure 5 This is a schematic diagram of the structure of the electronic device provided in an embodiment of the present invention. Detailed Implementation

[0020] The present invention will be further described in detail below with reference to specific embodiments, but the implementation of the present invention is not limited thereto.

[0021] Figure 1 and Figure 2 This is a flowchart illustrating the event-triggered dual-mode regional interconnected power grid collaborative AGC control method provided in an embodiment of the present invention. Figures 1-2 As shown, this embodiment of the invention provides an event-triggered dual-mode regional interconnected power grid cooperative AGC control method, applied to an interconnected power grid containing multiple control regions. The method includes: S1. Acquire the operating status of each control area in real time, and construct event trigger indicators based on the operating status.

[0022] The frequency deviation, tie-line power deviation, and active power output change of each control area are collected in real time as operating status quantities. The active power output change of the control area refers to the net change of active power output of all power generation and feed-in resources in the control area, including power loss caused by unit disconnection and DC feed-in loss.

[0023] The center frequency deviation of the interconnected power grid is determined based on the frequency deviation of each control area. Specifically, the center frequency deviation is the average frequency deviation of each control area. The rate of change of the center frequency deviation is then calculated to obtain the center frequency change rate. , The center frequency deviation is used as the reference point; and based on the frequency deviation and tie-line power deviation of each control area, the area control error of each control area is determined, wherein the first... The regional control error of each control area is expressed as follows: , For the first Frequency deviation of each control region For the first Frequency deviation coefficient of each control area For tie-line power deviation, in this embodiment, frequency deviation is the difference between the actual frequency and the rated frequency, and tie-line power deviation is the difference between the actual switching power and the planned switching power of the tie-line. Both can be obtained in real time through local measurement.

[0024] Based on this, an event trigger index is constructed according to the center frequency deviation, the rate of change of center frequency, the change in active power output in the main disturbance region, the regional control error of each control region, and the tie-line power deviation. The main disturbance region is the control region where there is a power deficit in the disturbance. In one embodiment, the event triggering index can be constructed as follows: ; In the formula, , , , These are the preset center frequency deviation weight, center frequency change rate weight, and the first... The regional control error weights and active power output change weights for each control area can be set offline according to the power grid operating characteristics. The change in active power output in the main disturbance region, i.e., the unit output lost due to the disturbance in the main disturbance region. Event trigger indicator. It comprehensively reflects the frequency drop depth, frequency drop rate, tie line power impact degree and power deficit scale caused by the disturbance. The larger the index value, the more serious the disturbance.

[0025] S2. When the event triggering index meets the preset triggering conditions and the total available reserve capacity meets the preset reserve conditions relative to the disturbance power deficit, the disturbance power deficit is allocated as the original support amount for each control area.

[0026] Before executing step S2, an event trigger determination is first performed: the event trigger indicator is judged. Is it greater than or equal to the preset trigger threshold? If not, output an event trigger signal. This indicates that collaborative support is not currently required; otherwise, an event trigger signal will be output. This indicates a large disturbance in the interconnected power grid that requires coordinated support. The trigger threshold can be adjusted based on the fluctuation range of the event triggering indicator under normal operating conditions, making it higher than the normal fluctuation level to avoid false triggering.

[0027] Then, a standby availability decision is made: the current total available standby capacity of the interconnected grid is assessed. In the FM resources, the first Taking a single thermal power unit as an example, the available reserve capacity of a single thermal power unit ), For the first The maximum reserve capacity of a thermal power unit. For the first The gradient rate of the thermal power unit. This is the preset backup response time window. For the first The maximum output of the Taiwan thermal power unit For the first The current output of the Taiwan thermal power unit For the first Taiwan thermal power unit load rate The operating condition reduction factor. The total available reserve capacity is obtained by summing the available reserve capacity of various frequency regulation resources such as thermal power, hydropower, pumped storage, or energy storage. It is then determined whether the total available reserve capacity is greater than or equal to the disturbance power deficit. With backup safety factor The product of is expressed by the following formula: .

[0028] If the total available spare capacity With disturbance power deficit If the above equation is not satisfied, then output a standby decision signal. This indicates the total available spare capacity. Insufficient to provide coordinated support; conversely, if always available spare capacity With disturbance power deficit If the above formula is satisfied, then a standby decision signal will be output. Backup safety factor The value of is greater than 1, for example, 1.2, to reserve a safety margin for backup assessment. It should be noted that in the above example, the disturbance power deficit is caused by the disturbance fault (such as DC single-pole blocking, sudden load increase or power failure, external feedin interruption, etc.), and not by the thermal power unit itself providing backup support; the available backup capacity of the thermal power unit is the support resource used to cope with the above disturbances and make up for the power deficit. The disturbance power deficit can be determined based on the active power lost after the disturbance; for example, the disturbance power deficit under a DC single-pole blocking fault is approximately 200MW of lost DC feedin power.

[0029] Only when the event triggers a signal And the backup decision signal is available. At that time, the disturbance power deficit is allocated as the original support amount for each control region. Specifically, the product of the disturbance power deficit and the first preset allocation ratio corresponding to each control region is calculated to obtain the original support amount allocated to each control region, i.e. ,in, For the first The first preset allocation ratio corresponding to each control area To be allocated to the first The original support quantity for each control area; it should be noted that the sum of the first preset allocation ratios corresponding to each control area is 1, and the first preset allocation ratio corresponding to the main disturbance area is greater than the first preset allocation ratios corresponding to the other control areas, reflecting the allocation principle of "priority to this area, supplementation to other areas". Taking a two-area interconnected power grid as an example, control area 1 is the main disturbance area, and its corresponding first preset allocation ratio is The first preset allocation ratio corresponding to control area 2 is .

[0030] On the other hand, if or If the disturbance power deficit is not allocated, each control area will only be regulated by local AGC closed-loop control.

[0031] S3. Taking the safe operation of the connecting line as a constraint, the original support quantity of the remaining control areas outside the main disturbance area is modified to obtain the safe support quantity of the remaining control areas.

[0032] Specifically, the power flow distribution factor of each remaining control area on tie line power is calculated. The power flow distribution factor characterizes the amount of tie line power change caused by a unit power injection change in the control area. It can be calculated offline based on the power flow model and updated periodically.

[0033] Based on the original support quantity and corresponding power distribution factor of each remaining control area, predict the predicted power deviation of the tie line after implementing the original support quantity: ; in, The power flow distribution factor of the tie-line power is determined by the power injection variation in the first control region. For the first The original support volume of each control area This refers to the number of control areas in an interconnected power grid.

[0034] The predicted power deviation is compared with a preset safety range, which is determined by the tie-line safety upper limit. With safety lower limit Definition. When the predicted power deviation is within the preset safety range, i.e. When this occurs, it indicates that the tie line is in a safe operating state, and the first... The original support quantity of each of the remaining control areas is directly used as its safety support quantity, that is... When the predicted power deviation exceeds the upper limit of the preset safety range, i.e. At this time, reduce the original support of the remaining control areas outside the main disturbance area. The main disturbance area refers to the control area with a disturbance power deficit. For example, the support can be obtained by modifying the following formula to obtain the first... Safety support capacity for the remaining control areas: ; in, The preset correction factor. For the first The original support volume of the remaining control areas For the first The safety support capacity of the remaining control areas.

[0035] When the predicted power deviation is lower than the lower limit of the preset safety range, i.e. At that time, increase the original support of the remaining control areas outside the main disturbance area, for example, by modifying it according to the following formula to obtain the first... Safety support capacity for the remaining control areas: ; It should be noted that in both of the above correction scenarios, the original support amount of the main disturbance region remains unchanged. In other words, the original support amount of the main disturbance region is directly used as its safety support amount. Furthermore, the safety support amount of each remaining control region obtained after correction satisfies the non-negativity constraint. Maintaining the support level of the main disturbance area during correction ensures that the support strength of the main disturbance area is not weakened by the safety constraints of the tie line.

[0036] S4. Based on the safety support amount of the remaining control areas, determine the additional support amount of various frequency modulation resources in the remaining control areas allocated to the main disturbance area.

[0037] Specifically, based on the center frequency deviation of the interconnected power grid With respect to the preset emergency support frequency difference reference value Determine the frequency difference attenuation factor The frequency difference attenuation factor decreases as the center frequency deviation decreases and its value does not exceed 1, so that the coordinated support force is larger in the early stage of the disturbance and gradually decreases as the frequency recovers, thus avoiding the support command from having a long-term effect after the frequency recovers.

[0038] The first Security support capacity of other control areas Preset area support gain and frequency difference attenuation factor Multiply to get the first... The first additional support for the remaining control areas The regional support gain can be preset according to the frequency modulation capability of each control region.

[0039] Subsequently, according to the second preset allocation ratio of various frequency regulation resources in each remaining control area, the corresponding first additional support quantity is allocated to the corresponding frequency regulation resources. For example, the first additional support quantity of a certain remaining control area can be allocated according to the second preset allocation ratio of 60% for thermal power, 30% for hydropower, and 10% for energy storage. The sum of the second preset allocation ratios of various frequency regulation resources in the same remaining control area is 1. The additional support quantity allocated to various frequency regulation resources is also subject to the ramp rate constraint and output range constraint of the corresponding frequency regulation resources. The amplitude of command changes exceeding the ramp capacity is limited, and the saturation processing is performed on commands exceeding the upper and lower limits of output to ensure that the issued support commands are executable.

[0040] S5. Based on the additional support amount allocated to the main disturbance area by various frequency modulation resources in the remaining control areas and the local control amount of various frequency modulation resources in the main disturbance area, generate the final control amount of various frequency modulation resources in the main disturbance area.

[0041] It should be emphasized that in this embodiment, the local AGC closed-loop control of each control area continues to operate, forming a stable foundation for the frequency regulation of the interconnected power grid.

[0042] Specifically, for the regional control error in the main disturbance region, a proportional-integral control law is used to process it, obtaining the local control quantities of various frequency modulation resources output by the local AGC closed-loop control in the main disturbance region. These local control quantities are then used to drive the corresponding frequency modulation resources to reduce the regional control error. Next, the local control quantities of various frequency modulation resources in the main disturbance region are superimposed with the additional support quantities allocated to the main disturbance region by the corresponding frequency modulation resources in other control regions, resulting in the final control quantities of various frequency modulation resources in the main disturbance region. The active power output of various frequency modulation resources is then controlled according to these final control quantities. Thus, collaborative support is injected into the original control system in an incremental form. The regulatory role of the local AGC closed-loop control is not replaced. In the initial stage of a large disturbance, rapid power support is provided by the additional support quantities. As the frequency recovers, the additional support quantities decay to zero with the frequency difference attenuation factor, returning to the normal operating mode where only the local AGC closed-loop control regulates. This forms a dual-mode collaborative AGC control method with normal operation of the local AGC closed-loop control and event-triggered collaborative support deployed on demand.

[0043] The following section uses a typical two-region interconnected power grid as an example to illustrate the above-mentioned event-triggered dual-mode regional interconnected power grid collaborative AGC control method.

[0044] The interconnected power grid comprises Control Area 1 and Control Area 2, interconnected by tie lines. Control Area 1 is the receiving-end grid, and Control Area 2 is the sending-end grid. Control Area 1 and Control Area 2 are equipped with frequency regulation resources such as thermal power plants, hydropower plants, and pumped storage power stations. The tie line exchange power from Control Area 2 to Control Area 1 is 132MW, the system base capacity is 1000MW, and the rated frequency is 50Hz. At simulation time t=5s, a 10MW distributed hydropower unit in Control Area 1 disconnects from the grid due to protection action, resulting in an instantaneous power loss of 10MW. At simulation time t=15s, a single-pole blocking fault occurs on the high-voltage direct current transmission line feeding into Control Area 1, causing an instantaneous loss of approximately 200MW of DC feed-in power to the receiving-end grid. Since both disturbances (the 10MW unit disconnection and the 200MW DC single-pole blocking) occur in Control Area 1, Control Area 1 is the main disturbance area.

[0045] Figure 3 The diagram compares the frequency changes in control area 1 under different capacity faults using traditional AGC and the event-triggered dual-mode regional interconnected grid coordinated AGC control method provided by this invention. The vertical axis represents the frequency of control area 1 in Hz, and the horizontal axis represents time in seconds. It is evident that, regardless of whether it is a 10MW unit grid disconnection fault or a 200MW DC unipolar blocking fault, the method provided by this invention significantly raises the minimum frequency point of control area 1, significantly shortens the frequency recovery time, and ensures that the tie-line power never exceeds the safe range. This verifies the coordinated control effect of this invention, which balances rapid frequency recovery and tie-line safety under large disturbance scenarios.

[0046] Figure 4 This is a schematic diagram of a structure of an event-triggered dual-mode regional interconnected power grid collaborative AGC control system provided in an embodiment of the present invention. Figure 4 As shown, this embodiment of the invention provides an event-triggered dual-mode regional interconnected power grid collaborative AGC control system 400, applied to an interconnected power grid containing multiple control areas. The system 400 includes: The indicator construction module 401 is used to acquire the operating status of each control area in real time and construct event-triggered indicators based on the operating status. The original support quantity allocation module 402 is used to allocate the disturbance power deficit as the original support quantity of each control area when the event triggering index meets the preset triggering conditions and the total available reserve capacity meets the preset reserve conditions relative to the disturbance power deficit. The original support quantity correction module 403 is used to correct the original support quantity of the remaining control areas outside the main disturbance area, with the safe operation of the tie line as a constraint, so as to obtain the safe support quantity of the remaining control areas; the main disturbance area is the control area with disturbance power deficiency; The additional support quantity determination module 404 is used to determine the additional support quantity allocated to the main disturbance area by various frequency modulation resources in the other control areas based on the safety support quantity of the other control areas. The final control quantity generation module 405 is used to generate the final control quantity of various frequency modulation resources in the main disturbance area based on the additional support quantity allocated to the main disturbance area by various frequency modulation resources in the other control areas and the local control quantity of various frequency modulation resources in the main disturbance area.

[0047] This invention also provides an electronic device 500, such as... Figure 5 As shown, it includes a processor 501, a communication interface 502, a memory 503, and a communication bus 504, wherein the processor 501, the communication interface 502, and the memory 503 communicate with each other through the communication bus 504. Memory 503 is used to store computer programs; When processor 501 executes the program stored in memory 503, it performs the following steps: The operating status data of each control area is acquired in real time, and event triggering indicators are constructed based on the operating status data. When the event triggering indicator meets the preset triggering condition and the total available reserve capacity meets the preset reserve condition relative to the disturbance power deficit, the disturbance power deficit is allocated as the original support amount for each of the control areas. With the safe operation of the tie line as a constraint, the original support amount of the remaining control areas outside the main disturbance area is corrected to obtain the safe support amount of the remaining control areas; the main disturbance area is the control area with a disturbance power deficit. Based on the safety support amount of the remaining control areas, determine the additional support amount of various frequency modulation resources in the remaining control areas allocated to the main disturbance area; Based on the additional support amount allocated to the main disturbance region by various frequency modulation resources in the remaining control regions and the local control amount of various frequency modulation resources in the main disturbance region, the final control amount of various frequency modulation resources in the main disturbance region is generated.

[0048] The communication bus mentioned in the above electronic devices can be a Peripheral Component Interconnect (PCI) bus or an Extended Industry Standard Architecture (EISA) bus, etc. This communication bus can be divided into address bus, data bus, control bus, etc. For ease of illustration, only one thick line is used to represent it in the diagram, but this does not mean that there is only one bus or one type of bus.

[0049] The communication interface is used for communication between the aforementioned electronic devices and other devices.

[0050] The memory may include random access memory (RAM) or non-volatile memory (NVM), such as at least one disk storage device. Optionally, the memory may also be at least one storage device located remotely from the aforementioned processor.

[0051] The processors mentioned above can be general-purpose processors, including central processing units (CPUs), network processors (NPs), etc.; they can also be digital signal processors (DSPs), application-specific integrated circuits (ASICs), field-programmable gate arrays (FPGAs), or other programmable logic devices, discrete gate or transistor logic devices, or discrete hardware components.

[0052] The method provided in this invention can be applied to electronic devices. Specifically, the electronic device can be a desktop computer, a portable computer, a smart mobile terminal, a server, etc. No limitation is made herein; any electronic device that can implement this invention falls within the protection scope of this invention.

[0053] In the description of this invention, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this invention, "a plurality of" means two or more, unless otherwise explicitly specified.

[0054] The use of terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples" indicates that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. In addition, those skilled in the art can combine and integrate the different embodiments or examples described in this specification.

[0055] The above description, in conjunction with specific preferred embodiments, provides a further detailed explanation of the present invention. It should not be construed that the specific implementation of the present invention is limited to these descriptions. For those skilled in the art, various simple deductions or substitutions can be made without departing from the concept of the present invention, and all such modifications and substitutions should be considered within the scope of protection of the present invention.

Claims

1. An event-triggered dual-mode regional interconnected power grid cooperative AGC control method, characterized in that, Applied to an interconnected power grid comprising multiple control areas, the method includes: The operating status data of each control area is acquired in real time, and event triggering indicators are constructed based on the operating status data. When the event triggering indicator meets the preset triggering condition and the total available reserve capacity meets the preset reserve condition relative to the disturbance power deficit, the disturbance power deficit is allocated as the original support amount for each of the control areas. With the safe operation of the tie line as a constraint, the original support amount of the remaining control areas outside the main disturbance area is corrected to obtain the safe support amount of the remaining control areas; the main disturbance area is the control area with a disturbance power deficit. Based on the safety support amount of the remaining control areas, determine the additional support amount of various frequency modulation resources in the remaining control areas allocated to the main disturbance area; Based on the additional support amount allocated to the main disturbance region by various frequency modulation resources in the remaining control regions and the local control amount of various frequency modulation resources in the main disturbance region, the final control amount of various frequency modulation resources in the main disturbance region is generated.

2. The method according to claim 1, characterized in that, The steps of acquiring the operating status quantities of each control region in real time and constructing event triggering indicators based on the operating status quantities include: Real-time acquisition of frequency deviation, tie-line power deviation and active power output changes in each control region; The center frequency deviation of the interconnected power grid is determined based on the frequency deviation of each of the control areas; The rate of change of the center frequency is determined based on the rate of change of the center frequency deviation. The regional control error of each control region is determined based on the frequency deviation and tie-line power deviation of each control region. An event trigger index is constructed based on the center frequency deviation, the center frequency change rate, the active power output change in the main disturbance region, the regional control error of each control region, and the tie-line power deviation.

3. The method according to claim 1, characterized in that, Before the step of allocating the disturbance power deficit to the original support amount of each control region according to the preset allocation rule when the event triggering index meets the preset triggering condition and the total available reserve capacity meets the preset reserve condition relative to the disturbance power deficit, the method further includes: Determine whether the event trigger indicator is greater than or equal to the trigger threshold; if not, output the event trigger signal. ; If so, output the event trigger signal. Furthermore, it determines whether the total available reserve capacity of the interconnected power grid is greater than or equal to the product of the disturbance power deficit and the reserve safety factor; if not, it outputs a reserve availability decision signal. If so, output a standby decision signal. .

4. The method according to claim 3, characterized in that, When the event triggering indicator meets the preset triggering condition and the total available reserve capacity meets the preset reserve condition relative to the disturbance power deficit, the step of allocating the disturbance power deficit as the original support amount for each of the control regions includes: When the event trigger signal And the backup available decision signal At that time, the product of the disturbance power deficit and the first preset allocation ratio corresponding to each control region is calculated to obtain the original support amount to allocate the disturbance power deficit to each control region; wherein, the sum of the first preset allocation ratios corresponding to each control region is 1, and the first preset allocation ratio corresponding to the main disturbance region is greater than the first preset allocation ratios corresponding to the other control regions.

5. The method according to claim 1, characterized in that, The step of modifying the original support values ​​of the remaining control areas outside the main disturbance area, with the safe operation of the tie line as a constraint, to obtain the safe support values ​​of the remaining control areas, includes: Calculate the power flow distribution factor of tie-line power for each remaining control area power injection variation; Based on the original support amount and power flow distribution factor of each remaining control area, predict the predicted power deviation of the tie line after the original support amount is executed; The predicted power deviation is compared with a preset safety range; When the predicted power deviation exceeds the upper limit of the preset safety range, the safety support amount of each of the remaining control areas is obtained by reducing the original support amount of each of the remaining control areas; when the predicted power deviation is lower than the lower limit of the preset safety range, the safety support amount of each of the remaining control areas is obtained by increasing the original support amount of each of the remaining control areas. When the predicted power deviation is within the preset safety range, the original support amount of the corresponding remaining control area is taken as the safety support amount of the remaining control area.

6. The method according to claim 1, characterized in that, The step of determining the additional support amount for allocating various frequency modulation resources within the remaining control areas to the main disturbance area based on the safety support amount of the remaining control areas includes: The frequency difference attenuation factor is determined based on the center frequency deviation of the interconnected power grid and the preset emergency support frequency difference reference value. Multiply the safety support amount of each of the remaining control regions, the preset region support gain, and the frequency difference attenuation factor to obtain the first additional support amount of each of the remaining control regions. According to the second preset allocation ratio corresponding to various frequency regulation resources in each of the remaining control areas, as well as the ramp rate constraints and output range constraints of various frequency regulation resources, the corresponding first additional support amount is allocated to various frequency regulation resources, so as to obtain the additional support amount of various frequency regulation resources in each of the remaining control areas allocated to the main disturbance area; the frequency regulation resources include at least one of thermal power, hydropower, pumped storage and energy storage.

7. The method according to claim 1, characterized in that, The step of generating the final control values ​​of various frequency modulation resources in the main disturbance region based on the additional support values ​​allocated to the main disturbance region by various frequency modulation resources in the remaining control regions and the local control values ​​of various frequency modulation resources in the main disturbance region includes: Local control quantities of various frequency modulation resources obtained from the local AGC closed-loop control output of the main disturbance region; The local control quantities of various frequency modulation resources within the main disturbance area are superimposed with the additional support quantities of the corresponding frequency modulation resources in the other control areas allocated to the main disturbance area to generate the final control quantities of various frequency modulation resources within the main disturbance area. The active power output of various frequency modulation resources is controlled according to the final control quantity.

8. The method according to claim 7, characterized in that, Before the step of obtaining the local control quantities of various frequency modulation resources from the local AGC closed-loop control output of the main disturbance region, the following steps are also included: The area control error of the control area is determined based on the tie line power deviation and the frequency deviation of the control area. The regional control error is processed using a proportional-integral control law to obtain the local control quantity of the corresponding frequency modulation resource for the local AGC closed-loop control output of the control region.

9. An event-triggered dual-mode regional interconnected power grid collaborative AGC control system, characterized in that, The system, applied to an interconnected power grid comprising multiple control areas, includes: The indicator construction module is used to acquire the operating status quantities of each control area in real time, and construct event trigger indicators based on the operating status quantities. The original support quantity allocation module is used to allocate the disturbance power deficit as the original support quantity of each of the control areas when the event triggering index meets the preset triggering conditions and the total available reserve capacity meets the preset reserve conditions relative to the disturbance power deficit. The original support quantity correction module is used to correct the original support quantity of the remaining control areas outside the main disturbance area, with the safe operation of the tie line as a constraint, to obtain the safe support quantity of the remaining control areas; the main disturbance area is the control area with a disturbance power deficit. The additional support quantity determination module is used to determine the additional support quantity allocated to the main disturbance region by various frequency modulation resources in the other control regions based on the safety support quantity of the other control regions. The final control quantity generation module is used to generate the final control quantity of various frequency modulation resources in the main disturbance area based on the additional support quantity allocated to the main disturbance area by various frequency modulation resources in the remaining control areas and the local control quantity of various frequency modulation resources in the main disturbance area.

10. A computer device, comprising a storage medium, a processor, and a computer program stored on the storage medium and executable on the processor, characterized in that, When the processor executes the computer program, it implements the steps of the event-triggered dual-mode regional interconnected power grid cooperative AGC control method as described in any one of claims 1 to 8.

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