A flexible load active management strategy verification method and system

Abstract

The present invention discloses a method and system for verifying a flexible load active management strategy, including: classifying and grading electric flexible loads based on historical data of power grid operation status detection results; obtaining the influence of electric flexible loads of different levels and groups on the change of power grid voltage and frequency according to the classifying and grading; setting power grid disturbance according to the influence, performing disturbance simulation on the power grid, and obtaining the relationship between the flexible load active management strategy and anti-disturbance. The present invention determines whether the power grid can withstand the disturbance generated in the process of changing from the power grid operation state before the basic control strategy verification test to the test target power grid operation state through simulation verification, and can more intuitively verify whether the flexible load active management strategy can increase the anti-disturbance of the power grid, which has the advantage of conveniently verifying whether the power grid can operate normally under different conditions.

Description

Technical Field

[0001] The present invention relates to the technical field of flexible load management strategy verification, and in particular to a flexible load active management strategy verification method and system. Background Art

[0002] The increasing demand for electricity in society's production and daily life has led to a peak in power operations, negative growth in power companies, and a significant impact on the power system. Flexible loads are a crucial component of power operations, supplementing power dispatch and becoming a key focus for my country's power operators. Effective flexible load dispatching promotes the efficient development of power companies, reduces operational pressure, and improves operational efficiency and quality. Distributed power sources and loads are characterized by intermittency and uncertainty, and the increase in new loads and distributed energy sources poses numerous challenges to the stable control of microgrids. Maintaining supply and demand balance and maintaining frequency and voltage stability in microgrids are key factors affecting the safe operation of active distribution networks.

[0003] With the increasing application of flexible AC transmission systems and the increasing capacity of components, whether the flexible AC transmission system can operate correctly according to the preset conditions and logic of the control strategy has an important impact on the safe and stable operation of the power system. Summary of the Invention

[0004] The purpose of this section is to summarize some aspects of the embodiments of the present invention and briefly introduce some preferred embodiments. Some simplifications or omissions may be made in this section and the abstract and title of this application to avoid obscuring the purpose of this section, the abstract and the title of the invention, and such simplifications or omissions should not be used to limit the scope of the present invention.

[0005] In view of the above existing problems, the present invention is proposed.

[0006] Therefore, the technical problem solved by the present invention is that the existing technology is easily affected by grid disturbances when verifying the effectiveness of the flexible load active management strategy, which makes the verification of the flexible load active management strategy more difficult; the existing flexible load active management strategy verification method and system verification method are relatively simple, and it is difficult to simulate the changes in the impact of charge changes on the grid under different circumstances, and the test results are relatively poor in comparability.

[0007] To solve the above technical problems, the present invention provides the following technical solution: a method for verifying a flexible load active management strategy, comprising:

[0008] Based on the historical data of the power grid operation status detection results, the flexible power loads are classified and graded;

[0009] According to the category grouping and level division, the influence of the electric power flexible loads of different levels and groups on the voltage and frequency of the power grid is obtained;

[0010] According to the impact, the power grid disturbance is set, the power grid disturbance simulation is performed, and the relationship between the flexible load active management strategy and the anti-disturbance performance is obtained.

[0011] As a preferred solution of the flexible load active management strategy verification method of the present invention, the category grouping and level division include:

[0012] The category grouping includes industrial user flexible load, commercial user flexible load and residential user flexible load;

[0013] The level classification includes first-level industrial user flexible load, second-level industrial user flexible load, first-level commercial user flexible load, second-level commercial user flexible load, first-level residential user flexible load, and second-level residential user flexible load.

[0014] As a preferred solution of the flexible load active management strategy verification method of the present invention, wherein: the power grid disturbance setting includes a small disturbance setting and a large disturbance setting,

[0015] The small disturbance setting disturbs the power grid through current power and flow control, transformer tap adjustment and irregular fluctuation of tie line power;

[0016] The large disturbance setting causes a disturbance of large power or impedance change to the power grid by switching the circuit breaker to test the anti-disturbance capability of the power grid;

[0017] When the grid load is the first-level residential user flexible load and the second-level residential user flexible load, the small disturbance setting is used. When the grid load is the first-level industrial user flexible load, the second-level industrial user flexible load, the first-level commercial user flexible load and the second-level commercial user flexible load, the large disturbance setting is used.

[0018] As a preferred solution of the flexible load active management strategy verification method of the present invention, wherein: the status detection result historical data includes:

[0019] Obtain the total active and reactive power output data of the power grid and the total active and reactive power demand data of the load, and determine whether a balance is achieved. If a balance is achieved, no data is recorded. If an imbalance occurs, it indicates a fault change, and the current data, voltage data, power data, power factor, and power data at this time are recorded.

[0020] Obtain the voltage and frequency of each bus in the power grid, and determine whether the voltage and frequency of each bus in the power grid are within the allowable deviation range for normal operation. If they are within the deviation range, no data is recorded; if they are not within the deviation range, the voltage and frequency data of each bus at this time are recorded;

[0021] Obtain the limits of each power supply device and power transmission and transformation equipment, and determine whether the limits of each power supply device and power transmission and transformation equipment are operating within the specified limits. If the limits are within the limits, no data is recorded. If the limits are not within the limits, the current limit data is recorded.

[0022] As a preferred solution of the flexible load active management strategy verification method of the present invention, wherein: the disturbance simulation includes:

[0023] Power load rated power operation control simulation verification, the power load rated power operation control simulation verification is carried out by controlling the load power of the power grid within the operating range of ±20% of the rated power, simulating fluctuations with a step size of 2% of the rated power, and recording the corresponding rated power;

[0024] The simulation verification of the active response control of the power load considering the importance level is carried out by controlling the power load power of the power grid under the condition of three-level power load to test the increase and decrease of the active power consumed by the power grid, and record the corresponding active power value;

[0025] The power load does not distinguish between levels of active response control simulation to perform simulation verification. The power load does not distinguish between levels of active response control simulation tests whether the power grid is in normal operation when the power grid load power is greater than the third level power load, and tests whether the supply and demand of the power grid system is balanced;

[0026] The electric load rated power operation control simulation verification is a small disturbance setting, and the electric load active response control simulation verification considering the importance level and the electric load active response control simulation verification without distinguishing levels are large disturbance settings.

[0027] As a preferred solution of the flexible load active management strategy verification method of the present invention, wherein: the acquisition of the relationship between the flexible load active management strategy and the anti-disturbance performance includes:

[0028] When performing disturbance simulation on the power grid, disturbance simulation is used for different levels of loads;

[0029] The first-level industrial user flexible load and the second-level industrial user flexible load are simulated and verified using the power load active response control simulation without distinguishing levels, the first-level commercial user flexible load and the second-level commercial user flexible load are simulated and verified using the power load active response control simulation considering the importance level, and the first-level residential user flexible load and the second-level residential user flexible load are simulated and verified using the power load rated power operation control simulation.

[0030] As a preferred solution of the flexible load active management strategy verification method of the present invention, wherein: the level division also includes:

[0031] If a power grid failure occurs, and the failure results in economic losses of at least RMB 5 million, the emergency situation cannot be controlled, and the fault repair takes more than 3 days, then the power supply load of the power grid will be a first-level industrial user flexible load;

[0032] If a power grid operation failure occurs, and the failure results in economic losses of no more than 5 million yuan and at least 1 million yuan, the emergency situation is under control but the accident continues to change, and the fault repair takes more than 1 day and less than 3 days, then the power supply load of the power grid is a second-level industrial user flexible load;

[0033] If a power grid operation failure occurs, and the failure results in economic losses of no more than RMB 1 million and at least RMB 500,000, the emergency situation is under control and the accident does not continue to change, and the fault repair takes more than 12 hours and less than 1 day, then the power supply load of the power grid is a first-level commercial user flexible load;

[0034] If a power grid operation failure occurs, and the failure results in economic losses of no more than RMB 500,000 and at least RMB 100,000, the emergency situation is under control and the accident remains unchanged, and the fault repair takes more than 4 hours and less than 12 hours, then the power supply load of the power grid is classified as a second-tier commercial user flexible load;

[0035] If a power grid operation failure occurs, and the failure results in economic losses of no more than 100,000 yuan and at least 50,000 yuan, the emergency state is under control and the accident does not change, and the fault repair takes more than 1 hour and less than 4 hours, then the power supply load of the power grid is the first-level residential user flexible load;

[0036] If a power grid operation failure occurs, and the failure results in economic losses of up to RMB 50,000, the emergency situation is under control and the accident does not change, and the fault repair takes less than 1 hour, then the power supply load of the power grid is a second-level residential user flexible load.

[0037] A flexible load active management strategy verification system, characterized by comprising a classification module, a parameter change acquisition module and a simulation evaluation module,

[0038] A classification module, which is used to classify and grade the flexible power loads based on historical data of power grid operation status detection results;

[0039] A parameter change acquisition module, the parameter change acquisition module is used to obtain the impact of different levels and groups of electric flexible loads on the grid voltage and frequency according to the category grouping and level division;

[0040] A simulation evaluation module is used to set power grid disturbance according to the impact, perform disturbance simulation on the power grid, and obtain the relationship between the flexible load active management strategy and anti-disturbance performance.

[0041] A computer device includes a memory and a processor, wherein the memory stores a computer program, and wherein the processor implements the steps of the above method when executing the computer program.

[0042] A computer-readable storage medium stores a computer program thereon, wherein the computer program implements the steps of the method described above when executed by a processor.

[0043] Beneficial effects of the present invention: The present invention provides a flexible load active management strategy verification method and system. Through the interaction of the grid operation status detection step and the power flexible load parameter setting and grading step, the flexible load parameters of the grid are set, and the power electronic flexible loads are graded according to their importance and degree of influence. This realizes the whole process control from the initial operation state of the grid to the test target operation state, and facilitates the comparison of the effectiveness of the flexible load management strategy. By simulation verification, it is determined whether the grid can withstand the disturbances generated in the process of changing from the grid operation state before the basic control strategy verification test to the test target grid operation state. It can more intuitively verify whether the flexible load active management strategy can increase the anti-disturbance ability of the grid, and has the advantage of conveniently verifying whether the grid can operate normally under different circumstances. BRIEF DESCRIPTION OF THE DRAWINGS

[0044] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following briefly introduces the drawings required for describing the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. Those skilled in the art can also derive other drawings based on these drawings without inventive effort. Among them:

[0045] Figure 1 A flowchart of a method and system for verifying a flexible load active management strategy provided by one embodiment of the present invention;

[0046] Figure 2This is a diagram of the internal structure of a computer device in a method and system for verifying a flexible load active management strategy provided by one embodiment of the present invention. DETAILED DESCRIPTION

[0047] To make the above-mentioned objects, features, and advantages of the present invention more clearly understood, the following detailed description of the specific embodiments of the present invention is given in conjunction with the accompanying drawings. It is obvious that the described embodiments are only part of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by ordinary persons in this field without creative work should fall within the scope of protection of the present invention.

[0048] In the following description, many specific details are set forth to facilitate a full understanding of the present invention. However, the present invention may also be implemented in other ways different from those described herein. Those skilled in the art may make similar generalizations without violating the connotation of the present invention. Therefore, the present invention is not limited to the specific embodiments disclosed below.

[0049] Secondly, the term "one embodiment" or "embodiment" herein refers to a specific feature, structure, or characteristic that may be included in at least one implementation of the present invention. The phrase "in one embodiment" appearing in various places throughout this specification does not necessarily refer to the same embodiment, nor does it refer to a separate or selective embodiment that is mutually exclusive of other embodiments.

[0050] The present invention is described in detail with reference to schematic diagrams. For ease of illustration, cross-sectional views of device structures may be partially enlarged and not to scale when describing embodiments of the present invention. Furthermore, the schematic diagrams are merely illustrative and should not limit the scope of the present invention. Furthermore, in actual production, the three-dimensional dimensions of length, width, and depth should be included.

[0051] In the description of the present invention, it should be noted that the terms "upper, lower, inner, and outer" and other references to orientations or positional relationships are based on the orientations or positional relationships shown in the accompanying drawings and are intended solely to facilitate and simplify the description of the present invention. They are not intended to indicate or imply that the devices or components referred to must have, be constructed, or operate in a specific orientation, and therefore should not be construed as limitations on the present invention. Furthermore, the terms "first, second, or third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0052] In this disclosure, unless otherwise specified or limited, the terms "mounted," "connected," and "connected" should be interpreted broadly. For example, they may refer to fixed, removable, or integral connections. They may also refer to mechanical, electrical, or direct connections, indirect connections through an intermediary, or internal communication between two components. Those skilled in the art will understand the specific meanings of these terms in this disclosure.

[0053] Example 1

[0054] Reference Figure 1-2 , which is the first embodiment of the present invention, provides a method and system for verifying a flexible load active management strategy, including:

[0055] Step 102: Based on the historical data of the power grid operation status detection results, the flexible power loads are grouped and graded;

[0056] The category grouping and level division include: the category grouping includes industrial user flexible load, commercial user flexible load and residential user flexible load;

[0057] Specifically, the level division includes first-level industrial user flexible load, second-level industrial user flexible load, first-level commercial user flexible load, second-level commercial user flexible load, first-level residential user flexible load, and second-level residential user flexible load.

[0058] Furthermore, the classification also includes that if a power grid operation failure occurs, and the failure results in economic losses of at least 5 million yuan, the emergency situation cannot be controlled, and the fault repair takes more than 3 days, then the power supply load of the power grid is classified as a first-level industrial user flexible load;

[0059] Furthermore, if a power grid operation failure occurs, and the failure results in economic losses of no more than 5 million yuan and at least 1 million yuan, the emergency situation is under control but the accident continues to change, and the fault repair takes more than 1 day and less than 3 days, then the power supply load of the power grid is a second-level industrial user flexible load;

[0060] Furthermore, if a power grid operation failure occurs, and the failure results in economic losses of no more than RMB 1 million and at least RMB 500,000, the emergency situation is under control and the accident does not continue to change, and the fault repair takes more than 12 hours and less than 1 day, then the power supply load of the power grid is classified as a first-level commercial user flexible load;

[0061] Furthermore, if a power grid operation failure occurs, and the failure results in economic losses of no more than RMB 500,000 and at least RMB 100,000, the emergency situation is under control and the incident remains unchanged, and the fault repair takes more than 4 hours and less than 12 hours, then the power supply load of the power grid is classified as a second-tier commercial user flexible load;

[0062] Furthermore, if a power grid operation failure occurs, and the failure results in economic losses of no more than 100,000 yuan and at least 50,000 yuan, the emergency state is controlled and the accident does not change, and the fault repair takes more than 1 hour and less than 4 hours, then the power supply load of the power grid is the first-level residential user flexible load;

[0063] Furthermore, if a failure occurs in the operation of the power grid, and the failure results in economic losses of up to RMB 50,000, the emergency state is controlled and the accident does not change, and the fault repair takes less than 1 hour, then the power supply load of the power grid is a flexible load for second-level residential users.

[0064] Furthermore, the operation status detection includes detecting whether the total active and reactive power output in the power grid is balanced with the total active and reactive power demand of the load, whether the voltage and frequency of each bus in the power grid are within the allowable deviation range of normal operation, whether each power supply equipment and transmission and transformation equipment are operating within the prescribed limits, whether the power system has sufficient rotating reserve and emergency reserve and the necessary adjustment measures to enable the power grid to withstand normal interference.

[0065] It should be noted that normal disturbances include the disconnection of a generator or a line without any fault.

[0066] Furthermore, the power flexible load parameters are set and graded, including setting the flexible load parameters of the power grid and grading the power electronic flexible loads according to their importance and degree of impact.

[0067] Step 104: Obtaining the impact of power flexible loads of different levels and groups on grid voltage and frequency based on the category grouping and level division;

[0068] The historical data of the status detection results includes obtaining the total active and reactive power output data of the power grid and the total active and reactive power demand data of the load, and judging whether a balance is achieved. If a balance is achieved, no data is recorded. If an imbalance occurs, it indicates a fault change, and the current data, voltage data, power data, power factor, and power data at this time are recorded.

[0069] It should be noted that the voltage and frequency of each bus in the power grid are obtained, and it is determined whether the voltage and frequency of each bus in the power grid are within the allowable deviation range for normal operation. If they are within the deviation range, no data is recorded; if they are not within the deviation range, the voltage and frequency data of each bus at this time are recorded;

[0070] Furthermore, the limits of each power supply device and power transmission and transformation equipment are obtained, and it is determined whether the limits of each power supply device and power transmission and transformation equipment are operating within the specified limits. If the limits are within the limits, no data is recorded; if the limits are not within the limits, the current limit data is recorded.

[0071] It should be noted that the test is about the impact of changes in power flexible load on grid voltage and frequency.

[0072] It should be noted that by testing the power supply side's ability to withstand frequency and voltage, and changing the power supply side's voltage and frequency, the grid load reduction potential itself is tested.

[0073] Step 106 : Performing grid disturbance settings according to the impact, performing disturbance simulation on the grid, and obtaining a relationship between the flexible load active management strategy and anti-disturbance performance.

[0074] The power grid disturbance setting includes a small disturbance setting and a large disturbance setting.

[0075] Furthermore, the small disturbance setting disturbs the power grid through current power and flow control, transformer tap adjustment and irregular fluctuation of tie line power;

[0076] Furthermore, the large disturbance setting causes a disturbance of large power or impedance change to the power grid by switching the circuit breaker to test the anti-disturbance capability of the power grid;

[0077] It should be noted that when the grid load is the first-level residential user flexible load and the second-level residential user flexible load, the small disturbance setting is used; when the grid load is the first-level industrial user flexible load, the second-level industrial user flexible load, the first-level commercial user flexible load and the second-level commercial user flexible load, the large disturbance setting is used.

[0078] Furthermore, the disturbance simulation includes a power load rated power operation control simulation verification, wherein the power load rated power operation control simulation verification controls the load power of the power grid within the operating range of ±20% of the rated power, performs fluctuation simulation with a step size of 2% of the rated power, and records the corresponding rated power;

[0079] Furthermore, the power load active response control simulation verification considering the importance level is carried out. The power load active response control simulation verification considering the importance level tests the increase and decrease of the active power consumed by the power grid under the condition of three-level power load by controlling the power grid load power and records the corresponding active power value.

[0080] Furthermore, the power load does not distinguish between levels of active response control simulation is simulated and verified. The power load does not distinguish between levels of active response control simulation tests whether the power grid is in normal operation when the power grid load power is greater than the third level power load, and tests whether the supply and demand of the power grid system is balanced.

[0081] It should be noted that the power load rated power operation control simulation verification is a small disturbance setting, and the power load active response control simulation verification considering the important level and the power load active response control simulation verification without distinguishing levels are large disturbance settings.

[0082] Furthermore, the acquisition of the relationship between the flexible load active management strategy and the anti-disturbance performance includes:

[0083] When performing disturbance simulation on the power grid, disturbance simulation is used for different levels of loads;

[0084] It should be noted that the first-level industrial user flexible load and the second-level industrial user flexible load are simulated and verified using the power load active response control simulation without distinguishing levels, the first-level commercial user flexible load and the second-level commercial user flexible load are simulated and verified using the power load active response control simulation considering the importance level, and the first-level residential user flexible load and the second-level residential user flexible load are simulated and verified using the power load rated power operation control simulation.

[0085] A flexible load active management strategy verification system, characterized by comprising a classification module, a parameter change acquisition module and a simulation evaluation module,

[0086] A classification module, which is used to classify and grade the flexible power loads based on historical data of power grid operation status detection results;

[0087] A parameter change acquisition module, the parameter change acquisition module is used to obtain the impact of different levels and groups of electric flexible loads on the grid voltage and frequency according to the category grouping and level division;

[0088] A simulation evaluation module is used to set power grid disturbance according to the impact, perform disturbance simulation on the power grid, and obtain the relationship between the flexible load active management strategy and anti-disturbance performance.

[0089] The above-mentioned unit modules can be embedded in or independent of the processor in the computer device in the form of hardware, or can be stored in the memory of the computer device in the form of software, so that the processor can call and execute the corresponding operations of the above-mentioned modules.

[0090] In one embodiment, a computer device is provided. The computer device may be a terminal, and its internal structure diagram may be as follows: Figure 2As shown. The computer device includes a processor, a memory, a communication interface, a display screen and an input device connected via a system bus. The processor of the computer device is used to provide computing and control capabilities. The memory of the computer device includes a non-volatile storage medium and an internal memory. The non-volatile storage medium stores an operating system and a computer program. The internal memory provides an environment for the operation of the operating system and the computer program in the non-volatile storage medium. The communication interface of the computer device is used to communicate with an external terminal in a wired or wireless manner, and the wireless manner can be achieved through WIFI, an operator network, NFC (near field communication) or other technologies. When the computer program is executed by the processor, a method and system for verifying a flexible load active management strategy is implemented. The display screen of the computer device can be a liquid crystal display screen or an electronic ink display screen, and the input device of the computer device can be a touch layer covering the display screen, or a button, trackball or touchpad provided on the computer device housing, or an external keyboard, touchpad or mouse.

[0091] In one embodiment, a computer-readable storage medium is provided, on which a computer program is stored. When the computer program is executed by a processor, the following steps are implemented:

[0092] Based on the historical data of the power grid operation status detection results, the flexible power loads are classified and graded;

[0093] According to the category grouping and level division, the influence of the electric power flexible loads of different levels and groups on the voltage and frequency of the power grid is obtained;

[0094] According to the impact, the power grid disturbance is set, the power grid disturbance simulation is performed, and the relationship between the flexible load active management strategy and the anti-disturbance performance is obtained.

[0095] Example 2

[0096] Reference Figure 1-2 , which is an embodiment of the present invention, provides a flexible load active management strategy verification method and system. In order to verify the beneficial effects of the present invention, scientific demonstration is carried out through comparative experiments.

[0097] Table 1 Effects of disturbances on different types of characteristic loads

[0098] Load type Disturbance type Adjustable capacity Adjustable capacity First-tier industrial user flexible load Large disturbance setting 20％ -20％ Second-tier industrial user flexible load Large disturbance setting 15％ -15％ First-tier commercial user flexible load Large disturbance setting 10％ -10％ Second-tier commercial user flexible load Large disturbance setting 8％ -8％ First-level residential user flexible load Small perturbation settings 6％ -6％ Second-level residential user flexible load Small perturbation settings 5％ -5％

[0099] It can be seen from Table 1 that when the flexible load of the first-level industrial user is set to a large disturbance, when the capacity change exceeds 20%, the flexible load active management strategy has no effect; when the flexible load of the second-level industrial user is set to a large disturbance, when the capacity change exceeds 15%, the flexible load active management strategy has no effect; when the flexible load of the first-level commercial user is set to a large disturbance, when the capacity change exceeds 10%, the flexible load active management strategy has no effect; when the flexible load of the second-level commercial user is set to a large disturbance, when the capacity change exceeds 8%, the flexible load active management strategy has no effect; when the flexible load of the first-level residential user is set to a small disturbance, when the capacity change exceeds 10%, the flexible load active management strategy has no effect; when the flexible load of the second-level residential user is set to a small disturbance, when the capacity change exceeds 8%, the flexible load active management strategy has no effect.

[0100] It should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and are not intended to limit the present invention. Although the present invention has been described in detail with reference to the preferred embodiments, those skilled in the art should understand that the technical solutions of the present invention may be modified or replaced by equivalents without departing from the spirit and scope of the technical solutions of the present invention, which should all be included in the scope of the claims of the present invention.

[0101] Those skilled in the art will appreciate that the embodiments of the present application can be provided as methods, systems, or computer program products. Therefore, the application can adopt the form of a complete hardware embodiment, a complete software embodiment, or an embodiment in combination with software and hardware. Moreover, the application can adopt the form of a computer program product implemented on one or more computer-usable storage media (including but not limited to disk storage, CD-ROM, optical storage, etc.) that contain computer-usable program code. The scheme in the embodiment of the present application can be implemented in various computer languages, for example, object-oriented programming language Java and literal translation scripting language JavaScript, etc.

[0102] The present application is described with reference to the flowcharts and / or block diagrams of the methods, devices (systems), and computer program products according to the embodiments of the present application. It should be understood that each process and / or box in the flowchart and / or block diagram, as well as the combination of the processes and / or boxes in the flowchart and / or block diagram, can be implemented by computer program instructions. These computer program instructions can be provided to a processor of a general-purpose computer, a special-purpose computer, an embedded processor, or other programmable data processing device to produce a machine, so that the instructions executed by the processor of the computer or other programmable data processing device generate instructions for implementing the steps in the process. Figure 1 a process or multiple processes and / or boxes Figure 1 A device that provides the functions specified in a block or multiple blocks.

[0103] These computer program instructions may also be stored in a computer readable memory that can direct a computer or other programmable data processing device to work in a specific manner, so that the instructions stored in the computer readable memory produce an article of manufacture comprising an instruction device, which implements the process Figure 1 a process or multiple processes and / or boxes Figure 1 The function specified in one or more boxes.

[0104] These computer program instructions can also be loaded onto a computer or other programmable data processing device so that a series of operational steps are executed on the computer or other programmable device to produce a computer-implemented process, thereby providing the instructions executed on the computer or other programmable device for implementing the process. Figure 1 a process or multiple processes and / or boxes Figure 1 A step that specifies a function in one or more boxes.

[0105] Although the preferred embodiments of the present application have been described, those skilled in the art may make additional changes and modifications to these embodiments once they have learned the basic creative concept. Therefore, the appended claims are intended to be interpreted as including the preferred embodiments and all changes and modifications that fall within the scope of the present application.

[0106] Obviously, those skilled in the art may make various changes and modifications to this application without departing from the spirit and scope of this application. Thus, if these modifications and variations of this application fall within the scope of the claims of this application and their equivalents, this application is intended to include these modifications and variations.

Claims

1. A method for verifying a flexible load active management strategy, characterized by: include, Based on the historical data of the power grid operation status detection results, the flexible power loads are classified and graded; According to the category grouping and level division, the influence of the electric power flexible loads of different levels and groups on the voltage and frequency of the power grid is obtained; According to the impact, a grid disturbance is set, a grid disturbance simulation is performed, and the relationship between the flexible load active management strategy and the anti-disturbance performance is obtained; The power grid disturbance setting includes a small disturbance setting and a large disturbance setting. The small disturbance setting disturbs the power grid through current power and flow control, transformer tap adjustment and irregular fluctuation of tie line power; The large disturbance setting causes a disturbance of large power or impedance change to the power grid by switching the circuit breaker to test the anti-disturbance capability of the power grid; When the grid load is the flexible load of first-tier residential users and second-tier residential users, the small disturbance setting is used; when the grid load is the flexible load of first-tier industrial users, second-tier industrial users, first-tier commercial users and second-tier commercial users, the large disturbance setting is used; The disturbance simulation includes: Power load rated power operation control simulation verification, the power load rated power operation control simulation verification is carried out by controlling the load power of the power grid within the operating range of ±20% of the rated power, simulating fluctuations with a step size of 2% of the rated power, and recording the corresponding rated power; The simulation verification of the active response control of the power load considering the importance level is carried out by controlling the power load power of the power grid under the condition of three-level power load to test the increase and decrease of the active power consumed by the power grid, and record the corresponding active power value; The power load does not distinguish between levels of active response control simulation to perform simulation verification. The power load does not distinguish between levels of active response control simulation tests whether the power grid is in normal operation when the power grid load power is greater than the third level power load, and tests whether the supply and demand of the power grid system is balanced; The rated power operation control simulation verification of the electric load is a small disturbance setting, and the active response control simulation verification of the electric load considering the importance level and the active response control simulation verification of the electric load without distinguishing the level are large disturbance settings; The acquisition of the relationship between the flexible load active management strategy and the anti-disturbance performance includes: When performing disturbance simulation on the power grid, disturbance simulation is used for different levels of loads; The first-level industrial user flexible load and the second-level industrial user flexible load are simulated and verified using the power load active response control simulation without distinguishing levels, the first-level commercial user flexible load and the second-level commercial user flexible load are simulated and verified using the power load active response control simulation considering the importance level, and the first-level residential user flexible load and the second-level residential user flexible load are simulated and verified using the power load rated power operation control simulation.

2. The method for verifying the flexible load active management strategy according to claim 1, wherein: The category grouping and grade division include: The category grouping includes industrial user flexible load, commercial user flexible load and residential user flexible load; The level classification includes first-level industrial user flexible load, second-level industrial user flexible load, first-level commercial user flexible load, second-level commercial user flexible load, first-level residential user flexible load, and second-level residential user flexible load.

3. The method for verifying the flexible load active management strategy according to claim 2, wherein: The status detection result historical data includes: Obtain the total active and reactive power output data of the power grid and the total active and reactive power demand data of the load, and determine whether a balance is achieved. If a balance is achieved, no data is recorded. If an imbalance occurs, it indicates a fault change, and the current data, voltage data, power data, power factor, and power data at this time are recorded. Obtain the voltage and frequency of each bus in the power grid, and determine whether the voltage and frequency of each bus in the power grid are within the allowable deviation range for normal operation. If they are within the deviation range, no data is recorded; if they are not within the deviation range, the voltage and frequency data of each bus at this time are recorded; Obtain the limits of each power supply device and power transmission and transformation equipment, and determine whether the limits of each power supply device and power transmission and transformation equipment are operating within the specified limits. If the limits are within the limits, no data is recorded. If the limits are not within the limits, the current limit data is recorded.

4. The method for verifying the flexible load active management strategy according to claim 3, wherein: The classification also includes: If a power grid failure occurs, and the failure results in economic losses of at least RMB 5 million, the emergency situation cannot be controlled, and the fault repair takes more than 3 days, then the power supply load of the power grid will be a first-level industrial user flexible load; If a power grid operation failure occurs, and the failure results in economic losses of no more than 5 million yuan and at least 1 million yuan, the emergency situation is under control but the accident continues to change, and the fault repair takes more than 1 day and less than 3 days, then the power supply load of the power grid is a second-level industrial user flexible load; If a power grid operation failure occurs, and the failure results in economic losses of no more than RMB 1 million and at least RMB 500,000, the emergency situation is under control and the accident does not continue to change, and the fault repair takes more than 12 hours and less than 1 day, then the power supply load of the power grid is a first-level commercial user flexible load; If a power grid operation failure occurs, and the failure results in economic losses of no more than RMB 500,000 and at least RMB 100,000, the emergency situation is under control and the accident remains unchanged, and the fault repair takes more than 4 hours and less than 12 hours, then the power supply load of the power grid is classified as a second-tier commercial user flexible load; If a power grid operation failure occurs, and the failure results in economic losses of no more than 100,000 yuan and at least 50,000 yuan, the emergency state is under control and the accident does not change, and the fault repair takes more than 1 hour and less than 4 hours, then the power supply load of the power grid is the first-level residential user flexible load; If a power grid operation failure occurs, and the failure results in economic losses of up to RMB 50,000, the emergency situation is under control and the accident does not change, and the fault repair takes less than 1 hour, then the power supply load of the power grid is a second-level residential user flexible load.

5. A flexible load active management strategy verification system using the method of claim 1, characterized in that: Including classification module, parameter change acquisition module and simulation evaluation module, A classification module, which is used to classify and grade the flexible power loads based on historical data of power grid operation status detection results; A parameter change acquisition module, the parameter change acquisition module is used to obtain the impact of different levels and groups of electric flexible loads on the grid voltage and frequency according to the category grouping and level division; A simulation evaluation module is used to set power grid disturbance according to the impact, perform disturbance simulation on the power grid, and obtain the relationship between the flexible load active management strategy and anti-disturbance performance.

6. A computer device comprising a memory and a processor, wherein the memory stores a computer program, wherein: When the processor executes the computer program, the steps of the method according to any one of claims 1 to 4 are implemented.

7. A computer-readable storage medium having a computer program stored thereon, characterized in that: When the computer program is executed by a processor, the steps of the method according to any one of claims 1 to 4 are implemented.

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