Dynamic correction and control method and system for low-frequency low-voltage load reduction configuration scheme

Abstract

The invention discloses a low-frequency low-voltage load reduction configuration scheme dynamic correction and control method and system, and the method comprises the steps: building a low-frequency low-voltage load reduction device and a strategy model, and collecting the real-time power of a load and the state information of the device; according to the load real-time power, an outlet soft pressing plate of the active feeder line is automatically quitted; according to the established device and strategy model and the real-time acquisition information, considering the state information of the device and whether the load is an active feeder line, and calculating the commissioning load cutting amount of each round in the region; and comparing the commissioning load shedding amount with a target value in the load reduction scheme, and according to a comparison result, scheduling the master station to automatically switch on and off the load outlet soft pressing plate, thereby realizing dynamic correction and automatic control of the load reduction scheme. According to the technical scheme, through automatic switching of the outlet soft pressing plate, accurate control over the load switching amount in operation is achieved, and over-switching and under-switching of the load are avoided.

Description

Technical Field

[0001] This invention belongs to the field of power grid safety and stability control, specifically relating to a dynamic correction and control method and system for low-frequency, low-voltage load reduction configuration schemes. Background Technology

[0002] Low-frequency and low-voltage load shedding devices are an important part of the third line of defense in the power system. Their function is to cut off part of the load according to plan when the frequency / voltage of the power system drops due to active / reactive power deficit, so that the frequency / voltage of the power system returns to the allowable range.

[0003] In recent years, with the increasing penetration rate of new energy sources such as wind power and photovoltaics, and the emergence of new loads such as electric vehicles, the power grid structure has become increasingly complex. Existing research and applications of low-frequency, low-voltage load shedding schemes have the following problems: 1) Most current research lacks a unified and clear model for low-frequency, low-voltage load shedding devices and strategies; 2) It does not consider the real-time switching between load lines and active power lines under the current high penetration rate of new energy sources, and the load shedding scheme cannot be automatically corrected in a timely manner; 3) Load shedding statistics are calculated based on the premise that all low-frequency, low-voltage load shedding devices are executed correctly, but the actual operating status of the devices and the activation / deactivation status of the soft / hard load shedding plates will affect the execution of the load shedding scheme, which may result in inconsistencies between the activated load shedding amount and the target value of the load shedding scheme; 4) Currently, no research has provided automatic correction and control methods, relying on manual adjustment of the load shedding scheme, which is labor-intensive and has low timeliness.

[0004] Based on this, this case arises. Summary of the Invention

[0005] The purpose of this invention is to provide a dynamic correction and control method and system for low-frequency, low-voltage load reduction schemes. By automatically engaging and disengaging the soft pressure plate at the outlet, the method achieves precise control of the load shedding amount, thereby avoiding over-shearing and under-shearing of the load.

[0006] To achieve the above objectives, the solution of the present invention is:

[0007] A dynamic correction and control method for a low-frequency, low-voltage load shearing configuration scheme includes,

[0008] Establish a model for low-frequency, low-voltage load shearing devices and strategies;

[0009] Collect real-time load power and device status information. The device status information includes device operating status, cycle function activation / deactivation settings or pressure plate status, and load reduction outlet soft and hard pressure plate status.

[0010] Based on the real-time load power, determine whether it is an active feeder. The dispatching master station automatically disconnects the outlet soft pressure plate of the active feeder through remote control function to ensure that the active feeder is not disconnected when the load reduction plan is executed.

[0011] Based on the established device and strategy model and real-time collected information, taking into account device status information and whether the load has an active feeder, the commissioning and load shedding volume of each round in the region is calculated.

[0012] The load shedding amount is compared with the target value in the load reduction plan. Based on the comparison results, the main dispatch station automatically activates and deactivates the soft pressure plate at the load outlet to achieve dynamic correction and automatic control of the load reduction plan.

[0013] Among them, the establishment of low-frequency and low-voltage load reduction device and strategy model includes the establishment of low-frequency and low-voltage load reduction device model, device setpoint model, device pressure plate model, low-frequency and low-voltage cycle model, cycle item model and regional cycle configuration model.

[0014] The low-frequency, low-voltage load shedding device model includes the dispatching agency, the substation, and the device's operating status; the device setting model includes the device, setting type, setting function type, and setting value; the device pressure plate model includes the device, pressure plate type, pressure plate function type, and pressure plate status; the low-frequency, low-voltage cycle model includes the device, cycle type, cycle function type, cycle number, action setting value, action delay setting value, cycle activation / deactivation setting value, and cycle activation / deactivation pressure plate; the cycle item model includes the cycle, associated equipment, load type, feeder switch, switch status, whether there is an active feeder, outlet soft pressure plate, and outlet hard pressure plate; the regional cycle configuration model includes the cycle type, cycle function type, cycle number, grid, required shedding ratio, required shedding amount, activated load shedding amount, cycle action setting value, and action delay setting value.

[0015] Among them, the automatic disconnection soft pressure plate of the active feeder at the dispatch master station includes...

[0016] Based on the real-time measured power of the load feeder, the inflow to the busbar is defined as negative and the outflow to the busbar as positive. By traversing all cycle data, if the load power associated with the cycle is negative, it is an active feeder. The outlet soft pressure plate of the corresponding load feeder is automatically deactivated through the remote control function to ensure that the active feeder is not disconnected.

[0017] The calculation includes the commissioning and load shedding volume for each round within the calculation area, including:

[0018] First, iterate through all round data items one by one. Based on the round to which the round item belongs, the unit to which the round belongs, and the plant to which the unit belongs, determine the load reduction set L for each round in this region layer by layer. set0_turn(i) , where i represents the round;

[0019] Then, calculate the commissioning load shedding for each round within this region:

[0020]

[0021] Where, kdev_run This is the operating status coefficient of the device to which the round item belongs. When the device is operating normally, this coefficient is 1; otherwise, it is 0. turn_on This is the function input / output coefficient for the round to which the round item belongs. When the function of the round is pressed down or a fixed value is input, this coefficient is 1; otherwise, it is 0. out_soft The output soft pressure plate coefficient is the load factor associated with the cycle item. This coefficient is 1 when the soft pressure plate is in operation, and 0 otherwise; k out_hard This is the outlet hard plate coefficient for the load associated with the cycle item. The coefficient is 1 when the hard plate is in operation, and 0 otherwise; k notactive This is the active feeder coefficient. When the load associated with the round item is an active feeder, this coefficient is 0; otherwise, it is 1. i represents the i-th round; n is the initial load reduction set L for the i-th round. set0_turn(i) Total number of intermediate rounds; p item(j),turn(i) L represents the load reduction set in the i-th round. set0_turn(i) The active power of the load associated with the j-th round term.

[0022] Among them, the automatic load reduction and deactivation soft pressure plate at the dispatch master station enables dynamic correction and automatic control of the load reduction scheme, including:

[0023] According to formula K turn(i) =P judge,turn(i) / P require,turn(i) Calculate the commissioning completion rate for each round, where P judge,turn(i) P is the calculated load shedding amount for the i-th round of operation. require,turn(i) K represents the load shedding amount for the i-th round in the load reduction scheme. turn(i) Let be the commissioning completion rate for the i-th round;

[0024] When the commissioning completion rate K turn(i) When the load exceeds the upper limit of the load reduction plan, the operating loads are prioritized according to their importance, and the outlet soft pressure plates of loads with higher load importance are removed first, so that the outlet soft pressure plate coefficient k of the corresponding load item is reduced. out_soft The value is set to 0, thereby reducing the load shedding amount P in the i-th round. judge,turn(i) Ultimately, this led to the completion of round K of commissioning. turn(i) Maintain within the target range;

[0025] When the commissioning completion rate K turn(i) When the load is below the target lower limit of the load reduction scheme, some of the standby load shedding outlet soft pressure plates need to be activated so that K turn(i) Maintain within the target range, where the standby load shedding meets the following conditions:

[0026] 1) The equipment to which the round item belongs is in operation, that is, the operation status coefficient k of the equipment to which the round item belongs. dev_run =1;

[0027] 2) The function input or fixed value input of the round to which the round item belongs, i.e., the function input / output coefficient k of the round to which the round item belongs. turn_on =1;

[0028] 3) The outlet soft pressure plate status of the load associated with the cycle item is "out", that is, the outlet soft pressure plate coefficient k of the load associated with the cycle item is "out". out_soft =0;

[0029] 4) The outlet hard plate state of the load associated with the cycle item is in operation, that is, the outlet hard plate coefficient k of the load associated with the cycle item. out_hard =1;

[0030] 5) The load associated with the cycle item is not an active feeder, i.e., is there an active feeder coefficient k? notactive =1;

[0031] 6) The round number belongs to the i-th round;

[0032] Among the standby load shedding loads that meet the above conditions, they are prioritized according to their importance. The outlet soft pressure plate for standby load shedding loads with lower importance is activated first, ensuring that the outlet soft pressure plate coefficient k of the corresponding load in the relevant cycle is optimized. out_soft The value is 1, thereby increasing the commissioning load P in the i-th round. judge,turn(i) Ultimately, this resulted in a commissioning completion rate K. turn(i) Maintain within the target range; if there is no standby load that meets the above conditions, an alarm will be issued, indicating an insufficient load shedding alarm.

[0033] A dynamic correction and control system for a low-frequency, low-voltage load reduction configuration scheme includes,

[0034] The low-frequency low-voltage load shedding device and strategy modeling module is configured to establish a low-frequency low-voltage load shedding device and strategy model.

[0035] The real-time data acquisition module is configured to collect real-time load power and device status information. The device status information includes device operating status, cycle function activation / deactivation settings or pressure plate status, and load reduction outlet soft and hard pressure plate status.

[0036] The dynamic correction module is configured to determine whether the feeder is active based on the real-time load power. The dispatch master station can automatically disconnect the outlet soft pressure plate of the active feeder through remote control to ensure that the active feeder is not disconnected when the load reduction plan is executed.

[0037] The commissioning load shedding calculation module is configured to calculate the commissioning load shedding for each cycle within a given area, based on the established device and strategy model and real-time acquired information, taking into account device status information and whether the load has an active feeder; and,

[0038] The automatic control module is configured to compare the load shedding amount with the target value in the load reduction plan. Based on the comparison result, the main station automatically activates or deactivates the load outlet soft pressure plate to realize the dynamic correction and automatic control of the load reduction plan.

[0039] A computer device includes a memory, a processor, and a computer program stored in the memory and executable on the processor; when the processor executes the computer program, it implements the steps of the dynamic correction and control method for low-frequency, low-voltage load shedding configuration scheme as described above.

[0040] A computer-readable storage medium storing a computer program; when executed by a processor, the computer program implements the steps of the dynamic correction and control method for low-frequency, low-voltage load shearing configuration scheme as described above.

[0041] After adopting the above scheme, this invention first establishes a low-frequency, low-voltage device and strategy model based on the basic elements and operational logic of the low-frequency, low-voltage load reduction strategy. Considering the real-time switching between grid load feeders and active feeders, it automatically deactivates the soft pressure plate at the output of the active feeder, ensuring that the active feeder is not disconnected during the load reduction scheme. Based on the strategy model, the real-time operating status of the device, and the real-time power of the load lines, it determines whether the load shedding amount in each round within the region meets the target requirements. If the load shedding amount is lower than the target lower limit, the soft pressure plate at the output of the standby load in that round is automatically activated according to load priority. If the load shedding amount is higher than the target upper limit, the soft pressure plate at the output of the activated load is automatically deactivated according to load priority. This invention takes into account the operating conditions of the device and the influence of load characteristics, dynamically adjusts the low-frequency, low-voltage load reduction scheme, achieves precise control of the load shedding amount, improves the automation management level of the third line of defense, and provides a solid foundation for the safe and stable operation of the power grid. Attached Figure Description

[0042] Figure 1 This is a flowchart of a dynamic correction and control method for a low-frequency, low-voltage load reduction configuration scheme according to the present invention;

[0043] Figure 2 This is a structural diagram of the low-frequency, low-voltage load reduction device and strategy model of the present invention. Detailed Implementation

[0044] The technical solution and beneficial effects of the present invention will be described in detail below with reference to the accompanying drawings.

[0045] This invention provides a dynamic correction and control method for low-frequency, low-voltage load shearing configuration schemes, including:

[0046] Establish a model for low-frequency, low-voltage load shearing devices and strategies;

[0047] Collect real-time load power and device status information. The device status information includes device operating status, cycle function activation / deactivation settings or pressure plate status, and load reduction outlet soft and hard pressure plate status.

[0048] Based on the real-time load power, determine whether it is an active feeder. The dispatching master station automatically disconnects the outlet soft pressure plate of the active feeder through remote control function to ensure that the active feeder is not disconnected when the load reduction plan is executed.

[0049] Based on the established device and strategy model and real-time collected information, taking into account device status information and whether the load has an active feeder, the commissioning and load shedding volume of each round in the region is calculated.

[0050] The load shedding amount is compared with the target value in the load reduction plan. Based on the comparison results, the main dispatch station automatically activates or deactivates the load outlet soft pressure plate, thereby realizing dynamic correction and automatic control of the load reduction plan.

[0051] Furthermore, the low-frequency, low-voltage load shedding device and strategy model include:

[0052] The models include: low-frequency low-voltage load shedding device model, device setpoint model, device pressure plate model, low-frequency low-voltage cycle model, cycle item model, and regional cycle configuration model. The model structure diagram is shown below. Figure 2 As shown.

[0053] Furthermore, the low-frequency, low-voltage load shedding device model includes: the dispatching agency, the plant / station, and the device's operating status. The device's operating status includes: in operation, decommissioned, standby, and planned.

[0054] Furthermore, the device setting model includes: the device to which it belongs, the setting type, the setting function type, and the setting value. Among them, the setting type includes: floating point, logic, integer, and character; the setting function type includes: low-frequency cycle action setting value, low-frequency cycle delay setting value, low-voltage cycle action setting value, low-voltage cycle delay setting value, and cycle activation / deactivation setting value.

[0055] Furthermore, the device pressure plate model includes: the device to which it belongs, pressure plate type, pressure plate function type, and pressure plate status. Among them, the pressure plate type includes: soft pressure plate and hard pressure plate; the pressure plate function type includes: remote control pressure plate, outlet pressure plate, maintenance pressure plate, low frequency load reduction function pressure plate, low voltage load reduction function pressure plate, and cycle commissioning / decommissioning pressure plate.

[0056] Furthermore, the low-frequency, low-voltage wheel model includes: the device to which it belongs, wheel type, wheel function type, wheel number, action setpoint, action delay setpoint, wheel engagement / disengagement setpoint, and wheel engagement / disengagement pressure plate. Wheel types include: basic wheel, acceleration wheel, and special wheel; wheel function types include: low-frequency load reduction and low-voltage load reduction; wheel numbers are 1, 2, 3… and so on.

[0057] Furthermore, the round-of-cycle model includes: the round to which it belongs, associated equipment, load type, feeder switch, switch status, whether there is an active feeder, outlet soft switch, and outlet hard switch. Among them, load type includes: high-risk users, important users, high proportion of residential load, medium proportion of residential load, low proportion of residential load, industrial load, commercial load, and agricultural load.

[0058] Furthermore, the regional load allocation model includes: load type, load function type, load number, grid to which it belongs, load shedding ratio, load shedding amount, load shedding amount put into operation, load action setting value, and action delay setting value. Among them, the load shedding amount is the load shedding target value issued by the control center; the load shedding ratio = load shedding amount / total load in the region.

[0059] Furthermore, the automatic disconnection of the active feeder outlet soft pressure plate by the dispatch master station includes:

[0060] Based on the real-time measured power of the load feeder, the input busbar is defined as negative and the output busbar as positive. By iterating through all cycle data, if the associated load power of a cycle is negative, it is an active feeder. The corresponding load feeder's output soft pressure plate is automatically deactivated via remote control, ensuring that the active feeder is not disconnected.

[0061] Furthermore, the calculation of the load shedding amount for each round of operation includes:

[0062] First, iterate through all round data items one by one. Based on the round to which the round item belongs, the unit to which the round belongs, and the plant to which the unit belongs, determine the load reduction set L for each round in this region layer by layer. set0_turn(i) , where i represents the round;

[0063] Then, calculate the commissioning load shedding for each round within this region:

[0064]

[0065] Where, k dev_run This is the operating status coefficient of the device to which the round item belongs. When the device is operating normally, this coefficient is 1; otherwise, it is 0. turn_on This is the function input / output coefficient for the round to which the round item belongs. When the function of the round is pressed down or a fixed value is input, this coefficient is 1; otherwise, it is 0. out_soft The output soft pressure plate coefficient is the load factor associated with the cycle item. This coefficient is 1 when the soft pressure plate is in operation, and 0 otherwise; k out_hard This is the outlet hard plate coefficient for the load associated with the cycle item. The coefficient is 1 when the hard plate is in operation, and 0 otherwise; k notactive This is the active feeder coefficient. When the load associated with the round item is an active feeder, this coefficient is 0; otherwise, it is 1. i represents the i-th round; n is the initial load reduction set L for the i-th round. set0_turn(i)Total number of intermediate rounds; p item(j),turn(i) L represents the load reduction set in the i-th round. set0_turn(i) The active power of the load associated with the j-th round term.

[0066] Furthermore, the method by which the dispatch master station dynamically corrects the load reduction scheme through automatic load outlet soft pressure plates includes:

[0067] According to formula K turn(i) =P judge,turn(i) / P require,turn(i) Calculate the commissioning completion rate for each round, where P judge,turn(i) P is the calculated load shedding amount for the i-th round of operation. require,turn(i) K represents the load shedding amount for the i-th round in the load reduction scheme. turn(i) Let be the commissioning completion rate for the i-th round.

[0068] When the commissioning completion rate K turn(i) When the load exceeds the upper limit of the load reduction plan, the operating loads are prioritized according to their importance, and the outlet soft pressure plates of loads with higher load importance are removed first, so that the outlet soft pressure plate coefficient k of the corresponding load item is reduced. out_soft The value is set to 0, thereby reducing the load shedding amount P in the i-th round. judge,turn(i) Ultimately, this led to the completion of round K of commissioning. turn(i) Maintain within the target range.

[0069] When the commissioning completion rate K turn(i) When the load is below the target lower limit of the load reduction scheme, some of the standby load shedding outlet soft pressure plates need to be activated so that K turn(i) Maintain within the target range. The standby load shedding must meet the following conditions:

[0070] 1) The equipment to which the round item belongs is in operation, that is, the operation status coefficient k of the equipment to which the round item belongs. dev_run =1;

[0071] 2) The function input or fixed value input of the round to which the round item belongs, i.e., the function input / output coefficient k of the round to which the round item belongs. turn_on =1;

[0072] 3) The outlet soft pressure plate status of the load associated with the cycle item is "out", that is, the outlet soft pressure plate coefficient k of the load associated with the cycle item is "out". out_soft =0;

[0073] 4) The outlet hard plate state of the load associated with the cycle item is in operation, that is, the outlet hard plate coefficient k of the load associated with the cycle item. out_hard =1;

[0074] 5) The load associated with the cycle item is not an active feeder, i.e., is there an active feeder coefficient k? notactive =1;

[0075] 6) The round number belongs to the i-th round;

[0076] Among the standby load shedding loads that meet the above conditions, they are prioritized according to their importance. The outlet soft pressure plate for standby load shedding loads with lower importance is activated first, ensuring that the outlet soft pressure plate coefficient k of the corresponding load in the relevant cycle is optimized. out_soft The value is 1, thereby increasing the commissioning load P in the i-th round. judge,turn(i) Ultimately, this resulted in a commissioning completion rate K. turn(i) Maintain within the target range. If there is no standby load that meets the above conditions, an alarm will be issued, indicating insufficient load shedding capacity.

[0077] This invention also provides a dynamic correction and control system for a low-frequency, low-voltage load reduction configuration scheme, comprising the following modules:

[0078] Low-frequency and low-voltage load reduction device and strategy modeling module: Based on the basic elements and action logic of the low-frequency and low-voltage load reduction strategy, establish the low-frequency and low-voltage load reduction device model, device setpoint model, device pressure plate model, low-frequency and low-voltage cycle model, cycle item model, and regional cycle configuration model.

[0079] Real-time data acquisition module: Based on the established low-frequency low-voltage load reduction device and strategy model, it collects data including real-time load power, device operating status, cycle function activation / deactivation settings or pressure plate status, and the status of soft and hard pressure plates at the load reduction outlet.

[0080] Dynamic correction module: Based on the real-time power of the load associated with the cycle item, determine whether the load is an active feeder. If it is an active feeder, automatically exit the soft pressure plate of the output of the load associated with that cycle item to ensure that the active feeder will not be cut off when the load reduction scheme is executed.

[0081] The commissioning load shedding calculation module considers the operating status of the device to which the cycle item belongs, the cycle function activation / deactivation setting or pressure plate status, the soft and hard pressure plate status of the cycle item outlet, and whether the load feeder associated with the cycle item is an active feeder, to calculate the commissioning load shedding for each cycle.

[0082] Automatic control module: Calculates the commissioning completion rate for each round. When the commissioning completion rate is higher than the target upper limit, it automatically deactivates the soft pressure plate at the outlet of the load with relatively high load importance in the commissioning load shedding of that round. When the commissioning completion rate is lower than the target lower limit, it automatically activates some soft pressure plates at the outlet of the load with relatively low importance in the standby load shedding, thereby realizing dynamic correction and automatic control of the commissioning load shedding.

[0083] This invention also provides another computer device, including a processor and a memory configured to store a computer program capable of running on the processor; wherein, when the processor is configured to run the computer program, it performs the method steps described in the foregoing embodiments.

[0084] In practical applications, the aforementioned processor includes a Field-Programmable Gate Array (FPGA), and the processor can be a Central Processing Unit (CPU) or a Digital Signal Processor (DSP). It is understood that for different devices, the electronic devices used to implement the functions of the aforementioned processor can also be other types, and this embodiment of the invention does not impose specific limitations.

[0085] The aforementioned memory can be volatile memory, such as random-access memory (RAM); or non-volatile memory, such as read-only memory (ROM), flash memory, hard disk drive (HDD), or solid-state drive (SSD); or a combination of the above types of memory, and provides instructions and data to the processor.

[0086] In an exemplary embodiment, the present invention also provides a computer-readable storage medium for storing a computer program.

[0087] Optionally, the computer-readable storage medium can be applied to any of the methods in the embodiments of the present invention, and the computer program causes the computer to execute the corresponding processes implemented by the processor in the various methods of the embodiments of the present invention. For the sake of brevity, these will not be described in detail here.

[0088] In the several embodiments provided by this invention, it should be understood that the disclosed devices and methods can be implemented in other ways. The device embodiments described above are merely illustrative. For example, the division of units is only a logical functional division, and in actual implementation, there may be other division methods, such as: multiple units or components can be combined, or integrated into another system, or some features can be ignored or not executed. In addition, the coupling, direct coupling, or communication connection between the various components shown or discussed can be through some interfaces, and the indirect coupling or communication connection between devices or units can be electrical, mechanical, or other forms.

[0089] Those skilled in the art will understand that embodiments of the present invention can be provided as methods, systems, or computer program products. Therefore, the present invention can take the form of a completely hardware embodiment, a completely software embodiment, or an embodiment combining software and hardware aspects. Furthermore, the present invention can take the form of a computer program product implemented on one or more computer-usable storage media (including but not limited to disk storage, CD-ROM, optical storage, etc.) containing computer-usable program code. The solutions in the embodiments of the present invention can be implemented using various computer languages, such as the object-oriented programming language Java and the interpreted scripting language JavaScript.

[0090] This invention is described with reference to flowchart illustrations and / or block diagrams of methods, apparatus (systems), and computer program products according to embodiments of the invention. It will be understood that each block of the flowchart illustrations and / or block diagrams, and combinations of blocks in the flowchart illustrations and / or block diagrams, can be implemented by computer program instructions. These computer program instructions can be provided to a processor of a general-purpose computer, special-purpose computer, embedded processor, or other programmable data processing apparatus to produce a machine, such that the instructions, which execute via the processor of the computer or other programmable data processing apparatus, generate instructions for implementing the flowchart illustrations and / or block diagrams. Figure 1 One or more processes and / or boxes Figure 1 A device that provides the functions specified in one or more boxes.

[0091] These computer program instructions may also be stored in a computer-readable storage medium that can direct a computer or other programmable data processing device to function in a particular manner, such that the instructions stored in the computer-readable storage medium produce an article of manufacture including instruction means, which are implemented in a process Figure 1 One or more processes and / or boxes Figure 1 The function specified in one or more boxes.

[0092] These computer program instructions may also be loaded onto a computer or other programmable data processing equipment to cause a series of operational steps to be performed on the computer or other programmable equipment to produce a computer-implemented process, thereby providing instructions that execute on the computer or other programmable equipment for implementing the process. Figure 1 One or more processes and / or boxes Figure 1 The steps of the function specified in one or more boxes.

[0093] Although preferred embodiments of the invention have been described, those skilled in the art, upon learning the basic inventive concept, can make other changes and modifications to these embodiments. Therefore, the appended claims are intended to be interpreted as including both the preferred embodiments and all changes and modifications falling within the scope of the invention.

[0094] Obviously, those skilled in the art can make various modifications and variations to this invention without departing from its spirit and scope. Therefore, if these modifications and variations fall within the scope of the claims of this invention and their equivalents, this invention also intends to include these modifications and variations.

Claims

1. A dynamic correction and control method for a low-frequency, low-voltage load shearing configuration scheme, characterized in that: include, Establish a model for low-frequency, low-voltage load shearing devices and strategies; Collect real-time load power and device status information. The device status information includes device operating status, cycle function activation / deactivation settings or pressure plate status, and load reduction outlet soft and hard pressure plate status. Based on the real-time load power, determine whether it is an active feeder, and disconnect the outlet soft pressure plate of the active feeder to ensure that the active feeder will not be disconnected when the load reduction plan is executed. Based on the established device and strategy model and real-time collected information, taking into account device status information and whether the load has an active feeder, the commissioning and load shedding volume of each round in the region is calculated. The load shedding amount is compared with the target value in the load reduction plan. Based on the comparison results, the main dispatch station automatically activates and deactivates the soft pressure plate at the load outlet to achieve dynamic correction and automatic control of the load reduction plan.

2. The method as described in claim 1, characterized in that: Establish a low-frequency and low-voltage load reduction device and strategy model, including establishing a low-frequency and low-voltage load reduction device model, device setpoint model, device pressure plate model, low-frequency and low-voltage cycle model, cycle item model, and regional cycle configuration model. The low-frequency, low-voltage load shedding device model includes the dispatching agency, the substation, and the device's operating status; the device setting model includes the device, setting type, setting function type, and setting value; the device pressure plate model includes the device, pressure plate type, pressure plate function type, and pressure plate status; the low-frequency, low-voltage cycle model includes the device, cycle type, cycle function type, cycle number, action setting value, action delay setting value, cycle activation / deactivation setting value, and cycle activation / deactivation pressure plate; the cycle item model includes the cycle, associated equipment, load type, feeder switch, switch status, whether there is an active feeder, outlet soft pressure plate, and outlet hard pressure plate; the regional cycle configuration model includes the cycle type, cycle function type, cycle number, grid, required shedding ratio, required shedding amount, activated load shedding amount, cycle action setting value, and action delay setting value.

3. The method as described in claim 1, characterized in that: The dispatch master station automatically disconnects the output soft pressure plate of the active feeder, including: Based on the real-time measured power of the load feeder, the inflow to the busbar is defined as negative and the outflow to the busbar as positive. By traversing all cycle data, if the load power associated with the cycle is negative, it is an active feeder. The outlet soft pressure plate of the corresponding load feeder is automatically deactivated through the remote control function to ensure that the active feeder is not disconnected.

4. The method as described in claim 1, characterized in that: Calculate the commissioning and load shedding volume for each round within the region. include, First, iterate through all round data items one by one. Based on the round to which the round item belongs, the unit to which the round belongs, and the plant to which the unit belongs, determine the load reduction set L for each round in this region layer by layer. set0_turn(i) , where i represents the round; Then, calculate the commissioning load shedding for each round within this region: Where, k dev_run This is the operating status coefficient of the device to which the round item belongs. When the device is operating normally, this coefficient is 1; otherwise, it is 0. turn_on This is the function input / output coefficient for the round to which the round item belongs. When the function of the round is pressed down or a fixed value is input, this coefficient is 1; otherwise, it is 0. out_soft The output soft pressure plate coefficient is the load factor associated with the cycle item. This coefficient is 1 when the soft pressure plate is in operation, and 0 otherwise; k out_hard This is the outlet hard plate coefficient for the load associated with the cycle item. The coefficient is 1 when the hard plate is in operation, and 0 otherwise; k notactive This is the active feeder coefficient. When the load associated with the round item is an active feeder, this coefficient is 0; otherwise, it is 1. i represents the i-th round; n is the initial load reduction set L for the i-th round. set0_turn(i) Total number of intermediate rounds; p item(j),turn(i) L represents the load reduction set in the i-th round. set0_turn(i) The active power of the load associated with the j-th round term.

5. The method as described in claim 1, characterized in that: The dispatching master station automatically switches on and off load outlet soft pressure plates to achieve dynamic correction and automatic control of load reduction schemes, including: According to formula K turn(i) =P judge,turn(i) / P require,turn(i) Calculate the commissioning completion rate for each round, where P judge,turn(i) P is the calculated load shedding amount for the i-th round of operation. require,turn(i) K represents the load shedding amount for the i-th round in the load reduction scheme. turn(i) Let be the commissioning completion rate for the i-th round; When the commissioning completion rate K turn(i) When the load exceeds the upper limit of the load reduction plan, the operating loads are prioritized according to their importance, and the outlet soft pressure plates of loads with higher load importance are removed first, so that the outlet soft pressure plate coefficient k of the corresponding load item is reduced. out_soft The value is set to 0, thereby reducing the load shedding amount P in the i-th round. judge,turn(i) Ultimately, this led to the completion of round K of commissioning. turn(i) Maintain within the target range; When the commissioning completion rate K turn(i) When the load is below the target lower limit of the load reduction scheme, some of the standby load shedding outlet soft pressure plates need to be activated so that K turn(i) Maintain within the target range, where the standby load shedding meets the following conditions: 1) The equipment to which the round item belongs is in operation, that is, the operation status coefficient k of the equipment to which the round item belongs. dev_run =1; 2) The function input or fixed value input of the round to which the round item belongs, i.e., the function input / output coefficient k of the round to which the round item belongs. turn_on =1; 3) The outlet soft pressure plate status of the load associated with the cycle item is "out", that is, the outlet soft pressure plate coefficient k of the load associated with the cycle item is "out". out_soft =0; 4) The outlet hard plate state of the load associated with the cycle item is in operation, that is, the outlet hard plate coefficient k of the load associated with the cycle item. out_hard =1; 5) The load associated with the cycle item is not an active feeder, i.e., is there an active feeder coefficient k? notactive =1; 6) The round number belongs to the i-th round; Among the standby load shedding loads that meet the above conditions, they are prioritized according to their importance. The outlet soft pressure plate for standby load shedding loads with lower importance is activated first, ensuring that the outlet soft pressure plate coefficient k of the corresponding load in the relevant cycle is optimized. out_soft The value is 1, thereby increasing the commissioning load P in the i-th round. judge,turn(i) Ultimately, this resulted in a commissioning completion rate K. turn(i) Maintain within the target range; if there is no standby load that meets the above conditions, an alarm will be issued, indicating an insufficient load shedding alarm.

6. A dynamic correction and control system for a low-frequency, low-voltage load reduction configuration scheme, characterized in that: include, The low-frequency low-voltage load shedding device and strategy modeling module is configured to establish a low-frequency low-voltage load shedding device and strategy model. The real-time data acquisition module is configured to collect real-time load power and device status information. The device status information includes device operating status, cycle function activation / deactivation settings or pressure plate status, and load reduction outlet soft and hard pressure plate status. The dynamic correction module is configured to determine whether the feeder is active based on the real-time load power. The dispatch master station can automatically disconnect the outlet soft pressure plate of the active feeder through remote control to ensure that the active feeder is not disconnected when the load reduction plan is executed. The commissioning load shedding calculation module is configured to calculate the commissioning load shedding for each round within the region based on the established device and strategy model and real-time acquired information, taking into account device status information and whether the load has an active feeder; and, The automatic control module is configured to compare the load shedding amount with the target value in the load reduction plan. Based on the comparison result, the main station automatically activates or deactivates the load outlet soft pressure plate to realize the dynamic correction and automatic control of the load reduction plan.

7. A computer device, comprising a memory, a processor, and a computer program stored in the memory and executable on the processor; characterized in that: When the processor executes the computer program, it implements the steps of the dynamic correction and control method for low-frequency, low-voltage load reduction configuration scheme as described in any one of claims 1 to 5.

8. A computer-readable storage medium storing a computer program; characterized in that: When the computer program is executed by the processor, it implements the steps of the dynamic correction and control method for low-frequency, low-voltage load reduction configuration scheme as described in any one of claims 1 to 5.

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