Power grid load reduction method, device, equipment, storage medium and computer program product

Abstract

The present invention discloses a power grid load shedding method, apparatus, equipment, storage medium and computer program product, including a load shedding method that, when a power grid is disturbed, first actively responds and then forcibly reduces the load according to the size of its frequency deviation value or voltage deviation value, and utilizes the voltage sensitivity of smart meter nodes and the size of the load shedding sensitivity index to execute the power grid load shedding process in a specific order, taking into account the differences in regulation characteristics between different smart meter nodes, and being able to integrate the interaction between active power and reactive power, thereby giving full play to the regulation function of the smart meter nodes themselves and reducing the cost of load shedding during the load shedding process.

Description

Technical Field

[0001] The present invention relates to the technical field of power systems, and in particular to a method, device, equipment, storage medium and computer program product for reducing load on a power grid. Background Art

[0002] When a serious fault occurs in the power system, resulting in a shortage of active power or reactive power, the frequency or voltage of the power system will drop sharply. Load shedding is required to maintain the stability of the frequency and voltage of the power system to prevent power outages.

[0003] Existing grid load shedding methods do not consider the interactive effects of voltage and frequency at smart meter nodes through active power and reactive power, and rely solely on local frequency or voltage measurements. This makes it difficult to fully account for the differences in frequency and voltage regulation characteristics between different load nodes, making it easy to over-cut when shedding the load, resulting in a high load shedding cost. 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 present invention provides a power grid load reduction method, apparatus, equipment, storage medium and computer program product, which can provide a power grid load reduction method, apparatus, computer equipment, storage medium and computer program product that can give full play to the regulatory role of the smart meter node itself to reduce the cost of load shedding.

[0007] To solve the above technical problems, the present invention provides the following technical solutions, a method for reducing power grid load, comprising:

[0008] When the power grid is disturbed, the deviation value of the power grid at the first moment is obtained;

[0009] Determine the relationship between the deviation value at the first moment and the active response threshold;

[0010] An operation corresponding to the relationship is performed according to the relationship.

[0011] As a preferred embodiment of the grid load shedding method of the present invention, the obtaining of the first-time deviation value of the grid includes, when the grid is disturbed, if the first-time deviation value of the grid exceeds a deviation range allowed for normal grid operation, determining whether the first-time deviation value is higher than an active response action threshold;

[0012] The deviation value is a frequency deviation value or a voltage deviation value;

[0013] The first moment corresponds to the moment when the power grid is disturbed.

[0014] As a preferred solution of the power grid load reduction method of the present invention, wherein: the determination of the relationship between the deviation value at the first moment and the active response threshold includes:

[0015] If the deviation value at the first moment is higher than the active response action threshold, determining the smart meter nodes whose voltage sensitivity is less than or equal to the set threshold, triggering the smart meter nodes whose voltage sensitivity is less than or equal to the set threshold, and performing active response actions in descending order of the load shedding sensitivity indicators of the smart meter nodes at the first moment;

[0016] After the smart meter node completes the active response action, obtaining a deviation value of the power grid at a second moment, and determining whether the deviation value at the second moment is higher than a load shedding action threshold;

[0017] The second moment corresponds to the moment when the smart meter node completes the active response action;

[0018] The smart meter node performs the active response action, including triggering the smart meter node to actively interrupt the interruptible load.

[0019] If the deviation value at the second moment is higher than the load shedding action condition threshold, load shedding control is performed on the smart meter nodes according to the load shedding sensitivity indicators of the smart meter nodes at the second moment in descending order.

[0020] As a preferred solution of the grid load reduction method of the present invention, before the step of determining the smart meter node whose voltage sensitivity is less than or equal to the set threshold, the method further includes:

[0021] Change the active power of the smart meter node to be requested;

[0022] Obtaining the sum of active power changes of the remaining smart meter nodes except the smart meter node to be determined;

[0023] Dividing the sum of the active power changes of the remaining smart meter nodes by the active power change of the smart meter node to be determined, and using the obtained value as the voltage sensitivity of the smart meter node to be determined;

[0024] According to the voltage operating value, frequency operating value, active power operating value and reactive power operating value of the smart meter node at the first moment, the instantaneous load-to-ground admittance of the smart meter node is calculated, and according to the instantaneous load-to-ground admittance, the load shedding sensitivity index of the smart meter node is calculated.

[0025] As a preferred embodiment of the power grid load shedding method, apparatus, device, storage medium and computer program product described in the present invention, the load shedding control on the smart meter nodes includes, for the smart meter nodes to be cut off, cutting off the load on the smart meter nodes to be cut off in order of load frequency adjustment coefficient from low to high.

[0026] As a preferred embodiment of the power grid load shedding method of the present invention, the performing load shedding control on the smart meter nodes further comprises grouping the plurality of smart meter nodes in descending order of the load shedding sensitivity indicators of the smart meter nodes at the second moment to obtain a plurality of groups;

[0027] After executing load shedding control on the smart meter nodes in a group, determining whether the deviation value at the third moment exceeds the deviation range allowed for normal operation of the power grid;

[0028] The third moment corresponds to the moment after a group of nodes are subjected to load shedding control; if the deviation value at the third moment still exceeds the deviation range allowed for normal operation of the power grid, load shedding control is performed on the smart meter nodes in the next group until the deviation value returns to the deviation range allowed for normal operation.

[0029] The present application provides a power grid load reduction device, which includes:

[0030] As a preferred solution of the power grid load reduction device of the present invention, it includes:

[0031] a disturbance detection module, configured to, when a power grid is disturbed, determine whether the deviation value of the power grid at a first moment exceeds an active response action threshold if the deviation value of the power grid at the first moment exceeds a deviation range allowed for normal power grid operation; the deviation value being a frequency deviation value or a voltage deviation value; the first moment corresponding to the moment when the power grid is disturbed;

[0032] an active response module, configured to, if the deviation value at the first moment is higher than an active response action threshold, determine a smart meter node whose voltage sensitivity is less than or equal to a set threshold, trigger the smart meter nodes whose voltage sensitivity is less than or equal to the set threshold, and perform an active response action in descending order of the load shedding sensitivity indicators of the smart meter nodes at the first moment;

[0033] The forced load shedding module is configured to obtain a deviation value of the power grid at a second moment after the smart meter node completes the active response action, and determine whether the deviation value at the second moment is higher than a load shedding action threshold; the second moment corresponds to the moment when the smart meter node completes the active response action; if the deviation value at the second moment is higher than the load shedding action condition threshold, load shedding control is performed on the smart meter node in descending order of the load shedding sensitivity indicators of the smart meter node at the second moment.

[0034] The present application provides a computer device, which includes a memory and a processor. The memory stores a computer program, and when the processor executes the computer program, the following steps are implemented:

[0035] As a preferred solution of the power grid load reduction computer device of the present invention, it includes:

[0036] When the power grid is disturbed, if the deviation value of the power grid at the first moment exceeds the deviation range allowed for normal operation of the power grid, it is determined whether the deviation value at the first moment is higher than the active response action threshold; the deviation value is a frequency deviation value or a voltage deviation value; the first moment corresponds to the moment when the power grid is disturbed;

[0037] If the deviation value at the first moment is higher than the active response action threshold, the smart meter nodes whose voltage sensitivity is less than or equal to the set threshold are determined, and the smart meter nodes whose voltage sensitivity is less than or equal to the set threshold are triggered to perform active response actions in the order of the load shedding sensitivity index of the smart meter nodes at the first moment from low to high;

[0038] After the smart meter node completes the active response action, obtaining a deviation value of the power grid at a second moment, and determining whether the deviation value at the second moment is higher than a load shedding action threshold; the second moment corresponds to the moment when the smart meter node completes the active response action;

[0039] If the deviation value at the second moment is higher than the load shedding action condition threshold, load shedding control is performed on the smart meter nodes according to the load shedding sensitivity indicators of the smart meter nodes at the second moment in descending order.

[0040] The present application provides a computer-readable storage medium having a computer program stored thereon. When the computer program is executed by a processor, the following steps are implemented:

[0041] As a preferred embodiment of the computer-readable storage medium for power grid load shedding according to the present invention, the invention includes:

[0042] When the power grid is disturbed, if the deviation value of the power grid at the first moment exceeds the deviation range allowed for normal operation of the power grid, it is determined whether the deviation value at the first moment is higher than the active response action threshold;

[0043] The deviation value is a frequency deviation value or a voltage deviation value;

[0044] The first moment corresponds to the moment when the grid is disturbed;

[0045] If the deviation value at the first moment is higher than the active response action threshold, the smart meter nodes whose voltage sensitivity is less than or equal to the set threshold are determined, and the smart meter nodes whose voltage sensitivity is less than or equal to the set threshold are triggered to perform active response actions in the order of the load shedding sensitivity index of the smart meter nodes at the first moment from low to high;

[0046] After the smart meter node completes the active response action, obtaining a deviation value of the power grid at a second moment, and determining whether the deviation value at the second moment is higher than a load shedding action threshold; the second moment corresponds to the moment when the smart meter node completes the active response action;

[0047] If the deviation value at the second moment is higher than the load shedding action condition threshold, load shedding control is performed on the smart meter nodes according to the load shedding sensitivity indicators of the smart meter nodes at the second moment in descending order.

[0048] The present application provides a computer program product having a computer program stored thereon, wherein the computer program is executed by a processor to perform the following steps:

[0049] When the power grid is disturbed, if the deviation value of the power grid at the first moment exceeds the deviation range allowed for normal operation of the power grid, it is determined whether the deviation value at the first moment is higher than the active response action threshold; the deviation value is a frequency deviation value or a voltage deviation value; the first moment corresponds to the moment when the power grid is disturbed;

[0050] If the deviation value at the first moment is higher than the active response action threshold, the smart meter nodes whose voltage sensitivity is less than or equal to the set threshold are determined, and the smart meter nodes whose voltage sensitivity is less than or equal to the set threshold are triggered to perform active response actions in the order of the load shedding sensitivity index of the smart meter nodes at the first moment from low to high;

[0051] After the smart meter node completes the active response action, obtaining a deviation value of the power grid at a second moment, and determining whether the deviation value at the second moment is higher than a load shedding action threshold; the second moment corresponds to the moment when the smart meter node completes the active response action;

[0052] If the deviation value at the second moment is higher than the load shedding action condition threshold, load shedding control is performed on the smart meter nodes according to the load shedding sensitivity indicators of the smart meter nodes at the second moment in descending order.

[0053] Beneficial effects of the present invention: The above-mentioned power grid load shedding method, device, computer equipment, storage medium and computer program product, when the power grid is disturbed, adopts a load shedding method of first actively responding and then forcibly shedding the load according to the size of its frequency deviation value or voltage deviation value, and utilizes the voltage sensitivity of the smart meter node and the size of the load shedding sensitivity index to execute the power grid load shedding process in a specific order, taking into account the differences in regulation characteristics between different smart meter nodes, and being able to integrate the interaction between active power and reactive power, thereby giving full play to the regulation role of the smart meter node itself and reducing the cost of load removal during the load shedding process. BRIEF DESCRIPTION OF THE DRAWINGS

[0054] 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:

[0055] Figure 1 A schematic flow chart of a method for reducing power grid load according to an embodiment of the present invention;

[0056] Figure 2 A flowchart illustrating steps for calculating voltage sensitivity according to an embodiment of the present invention is provided.

[0057] Figure 3 A schematic flow chart of a method for reducing power grid load provided in one embodiment of the present invention;

[0058] Figure 4 A structural block diagram of a power grid load reduction device provided by one embodiment of the present invention;

[0059] Figure 5 A diagram showing the internal structure of a computer device according to an embodiment of the present invention. DETAILED DESCRIPTION

[0060] 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.

[0061] 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.

[0062] 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.

[0063] 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.

[0064] 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.

[0065] 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.

[0066] Example 1

[0067] Reference Figure 1-5 , which is the first embodiment of the present invention, provides a power grid load reduction method, apparatus, device, storage medium, and computer program product, including:

[0068] S1: When the power grid is disturbed, if the deviation value of the power grid at the first moment exceeds the deviation range allowed for normal operation of the power grid, it is determined whether the deviation value at the first moment is higher than the active response action threshold; the deviation value is a frequency deviation value or a voltage deviation value; the first moment corresponds to the moment when the power grid is disturbed.

[0069] Specifically, when the power grid is disturbed, the grid frequency and voltage drop. If the deviation between the frequency or voltage of the power grid and the standard frequency or standard voltage exceeds the deviation range allowed for normal operation of the power grid, the deviation value at the moment the power grid is disturbed is judged to be higher than the active response action threshold to determine whether an active response is required.

[0070] If the deviation value at the first moment is higher than the active response action threshold, the smart meter nodes whose voltage sensitivity is less than or equal to the set threshold are determined, and the smart meter nodes whose voltage sensitivity is less than or equal to the set threshold are triggered, and the active response action is performed in the order of the load reduction sensitivity indicators of the smart meter nodes at the first moment from low to high.

[0071] Specifically, if the deviation value at the moment the power grid is disturbed is higher than the active response action threshold, the smart meter node will actively respond. Taking into account the interaction between active power and reactive power, it is necessary to first determine the voltage sensitivity of each smart meter node. If the voltage sensitivity of the smart meter node is too large, it means that when the load on the smart meter node is interrupted, it may cause the voltage of the smart meter node and its nearby area to rise, and then cause the active power increment of the remaining smart meter nodes to exceed the interrupted load. In other words, there is a risk of negative effects on the active response of the smart meter node. Therefore, it is determined that the smart meter nodes with a voltage sensitivity less than or equal to the set threshold participate in the active response.

[0072] To reduce the risk of negative effects, insensitive nodes are prioritized for regulation. The smart meter nodes participating in the active response will execute active response actions in ascending order of their load shedding sensitivity index at the moment of the grid disturbance. The load shedding sensitivity index is calculated based on local information from each smart meter node.

[0073] After the smart meter node completes the active response action, the deviation value of the power grid at the second moment is obtained to determine whether the deviation value at the second moment is higher than the load reduction action threshold; the second moment corresponds to the moment when the smart meter node completes the active response action.

[0074] Specifically, after the smart meter node completes its active response, if the grid frequency or voltage has not returned to normal operating range and continues to drop when disturbed, the grid's deviation value at the time of the active response is obtained to determine whether it exceeds the load shedding threshold to determine whether load shedding control is necessary. It should be noted that the load shedding threshold is higher than the active response threshold.

[0075] If the deviation value at the second moment is higher than the load shedding action condition threshold, load shedding control is performed on the smart meter nodes according to the load shedding sensitivity indicators of the smart meter nodes at the second moment in descending order.

[0076] Specifically, if the deviation value at the time a smart meter node completes its active response action exceeds the load shedding threshold, forced load shedding is initiated. The greater the load shedding sensitivity index of a smart meter node, the more beneficial it is for controlling the frequency or voltage stability of the power grid by shedding an equal amount of load at that smart meter node. Therefore, load shedding control is implemented on smart meter nodes in descending order of their load shedding sensitivity index at the time of their active response action.

[0077] S2: Change the active power of the smart meter node to be determined, obtain the sum of the active power changes of the remaining smart meter nodes except the smart meter node to be determined, divide the sum of the active power changes of the remaining smart meter nodes by the active power change of the smart meter node to be determined, and use the obtained value as the voltage sensitivity of the smart meter node to be determined.

[0078] Furthermore, in power systems, it's generally assumed that active power affects frequency, while reactive power affects voltage. However, in actual power system operation, active power affects voltage, and reactive power also affects frequency. Therefore, it's necessary to consider the interaction between active and reactive power on voltage and frequency at smart meter nodes, and to factor in active power when calculating the voltage sensitivity of each smart meter node.

[0079] For example, the voltage sensitivity of a smart meter node can be calculated as follows:

[0080]

[0081] Where ΔP UI represents the voltage sensitivity of the smart meter node i to be determined; ΔP i represents the active power change of the smart meter node i to be determined; It represents the sum of the active power changes of the smart meter nodes except the smart meter node i.

[0082] Specifically, the voltage operating value, frequency operating value, active power operating value, and reactive power operating value represent local information at the smart meter node. Based on this local information, the instantaneous load-to-ground admittance of each smart meter node can be calculated. This sensitivity, or load shedding sensitivity index, is then used to determine the sensitivity of each smart meter node to frequency fluctuations. The first moment corresponds to the moment of a power grid disturbance. Immediately after a power grid disturbance, the real-time load shedding sensitivity index for each smart meter node is obtained.

[0083] For example, the instantaneous load-to-ground admittance of the smart meter node i can be calculated as follows:

[0084]

[0085] in, P 0i and Q 0i It represents the initial active power and initial reactive power of smart meter node i under normal operation; P i (t) and Q i (t) represents the real-time active power and reactive power of smart meter node i.

[0086] For example, the load shedding sensitivity index of a smart meter node can be calculated as follows:

[0087]

[0088] S i (t)=|R i (t)| 2 =Y ref_i (t) 2 +Y imf_i (t) 2

[0089] Among them, f i (t) represents the real-time frequency of smart meter node i; f N Indicates the rated frequency of the power system; Y ref_i (t) and Y imf_i (t) represents R i The real and imaginary parts of (t); S i (t) represents the load shedding sensitivity index.

[0090] This application uses a perturbation method to sequentially calculate the voltage sensitivity of each smart meter node. This method proactively fine-tunes the active power of the smart meter node to be determined, and records the active power changes of the remaining smart meter nodes before and after the active power change of the smart meter node to be determined. The sum of the active power changes of the remaining smart meter nodes is then divided by the active power change of the smart meter node to be determined, and the resulting value is used as the voltage sensitivity of the smart meter node to be determined.

[0091] Example 2

[0092] Reference Figure 1-5 , which is an embodiment of the present invention, provides a power grid load reduction method, device, equipment, storage medium and computer program product. In order to verify the beneficial effects of the present invention, scientific demonstration is carried out through experiments.

[0093] by Figure 3As shown, the smart meter nodes are grouped, the number of smart meter nodes in each round of load shedding is controlled, and multiple rounds of load shedding are performed. After each round of load shedding, it is analyzed whether the power grid has returned to normal operation, which reduces the occurrence of over-cutting problems during load shedding and reduces the cost of load shedding. When the power grid is disturbed, the interruptible load at each smart meter node is determined, and then the voltage sensitivity of each smart meter node is determined based on the perturbation, and the load shedding sensitivity index of each smart meter node is calculated in real time.

[0094] The system determines whether the grid's frequency deviation or voltage deviation exceeds the grid's active response threshold. If so, it proceeds to the next step. If not, it repeats the above steps, continuing to calculate the load shedding sensitivity index for each load node in real time. It then selects smart meter nodes whose voltage sensitivity is less than or equal to the set threshold. These smart meter nodes then perform active response actions in ascending order of load shedding sensitivity index. If the voltage sensitivity of a smart meter node exceeds the set threshold, the smart meter node's active response is canceled. For example, the set threshold for voltage sensitivity is 1.0.

[0095] By determining whether the frequency deviation or voltage deviation of the power grid exceeds the load shedding threshold, if so, the process proceeds to the next step. If not, the process returns to the previous step and continues to calculate the load shedding sensitivity index of each load node in real time.

[0096] Load shedding control is performed on the smart meter nodes in descending order of their load shedding sensitivity indicators. This process involves dividing multiple smart meter nodes into groups, performing load shedding control on each group, and determining after each group completes load shedding whether the grid voltage or frequency deviation still exceeds the allowable deviation range for normal grid operation. The load shedding process ends when the grid returns to normal operation.

[0097] The comparison of some of the beneficial effects mentioned in the present invention with those of conventional technologies is shown in the following table:

[0098]

[0099] Figure 4 The present invention provides a power grid load reduction device, comprising a disturbance detection module, configured to, when the power grid is disturbed, determine whether the deviation value of the power grid at a first moment exceeds an allowable deviation range for normal operation of the power grid, whether the deviation value at the first moment is higher than an active response action threshold; the deviation value is a frequency deviation value or a voltage deviation value; the first moment corresponds to the moment when the power grid is disturbed;

[0100] an active response module, configured to, if the deviation value at the first moment is higher than the active response action threshold, determine the smart meter nodes whose voltage sensitivity is less than or equal to the set threshold, trigger the smart meter nodes whose voltage sensitivity is less than or equal to the set threshold, and perform active response actions in descending order of the load shedding sensitivity indicators of the smart meter nodes at the first moment;

[0101] The forced load shedding module is used to obtain the deviation value of the power grid at the second moment after the smart meter node completes the active response action, and determine whether the deviation value at the second moment is higher than the load shedding action threshold; the second moment corresponds to the moment when the smart meter node completes the active response action; if the deviation value at the second moment is higher than the load shedding action condition threshold, then load shedding control is performed on the smart meter node according to the load shedding sensitivity indicators of the smart meter node at the second moment from high to low.

[0102] In this embodiment, the device also includes a voltage sensitivity calculation module, which is used to change the active power of the smart meter node to be determined; obtain the sum of the active power changes of the remaining smart meter nodes except the smart meter node to be determined; divide the sum of the active power changes of the remaining smart meter nodes by the active power change of the smart meter node to be determined, and use the obtained value as the voltage sensitivity of the smart meter node to be determined.

[0103] In this embodiment, the device also includes a load shedding sensitive index calculation module, which is used to calculate the instantaneous load-to-ground admittance of the smart meter node based on the voltage operating value, frequency operating value, active power operating value and reactive power operating value of the smart meter node at the first moment; and calculate the load shedding sensitive index of the smart meter node based on the instantaneous load-to-ground admittance.

[0104] In this embodiment, the active response module is further used to trigger the smart meter node to actively interrupt the interruptible load.

[0105] In this embodiment, the forced load shedding module is further configured to shear off the load on the smart meter nodes to be cut off according to the order of load frequency adjustment coefficient from low to high.

[0106] In this embodiment, the forced load shedding module is further used to group multiple smart meter nodes in descending order of the load shedding sensitivity indicators of the smart meter nodes at the second moment to obtain multiple groups; after executing load shedding control on the smart meter nodes in one group, determine whether the deviation value at the third moment exceeds the deviation range allowed for normal operation of the power grid; the third moment is the moment corresponding to the group after the load shedding control is executed; if the deviation value at the third moment still exceeds the deviation range allowed for normal operation of the power grid, execute load shedding control on the smart meter nodes in the next group until the deviation value returns to the deviation range allowed for normal operation.

[0107] The specific definition of the power grid load reduction device can be found in the definition of the power grid load reduction method above and will not be repeated here. Each module in the above-mentioned power grid load reduction device can be implemented in whole or in part through software, hardware, or a combination thereof. Each of the above-mentioned modules can be embedded in or independent of a processor in a computer device in hardware form, or can be stored in a memory in the computer device in software form, so that the processor can call and execute the corresponding operations of each of the above modules.

[0108] Figure 5 The present invention provides a computer device. The computer device includes a processor, a memory, and a network interface 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, a computer program, and a database. The internal memory provides an environment for the operation of the operating system and the computer program in the non-volatile storage medium. The database of the computer device is used to store data related to the power grid load reduction method. The network interface of the computer device is used to communicate with an external terminal via a network connection. The computer device also includes an input / output interface, which is a connection circuit for exchanging information between the processor and an external device. The input / output interface is connected to the processor via a bus and is referred to as an I / O interface. When the computer program is executed by the processor, a power grid load reduction method is implemented.

[0109] Those skilled in the art will understand that Figure 5 The structure shown in the figure is only a block diagram of a part of the structure related to the solution of the present application, and does not constitute a limitation on the computer device to which the solution of the present application is applied. The specific computer device may include more or fewer components than shown in the figure, or combine certain components, or have a different component arrangement.

[0110] In this embodiment, a computer device is provided, including a memory and a processor. The memory stores a computer program, and the processor implements the steps in the above-mentioned method embodiments when executing the computer program.

[0111] In this 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 steps in the above-mentioned method embodiments are implemented.

[0112] In this embodiment, a computer program product is provided, on which a computer program is stored. The computer program is used by a processor to execute the steps in the above-mentioned method embodiments.

[0113] The present invention relates to a method, apparatus, device, storage medium and computer program product for reducing load on a power grid. When the power grid is disturbed, a load reduction method is adopted in which an active response is first performed and then a forced load reduction is performed according to the magnitude of its frequency deviation value or voltage deviation value. The power grid load reduction process is executed in a specific order by utilizing the voltage sensitivity and the magnitude of the load reduction sensitivity index of the smart meter node. The method takes into account the differences in the regulation characteristics between different smart meter nodes and can integrate the interaction between active power and reactive power, thereby giving full play to the regulation function of the smart meter node itself and reducing the cost of load removal during the load reduction process.

[0114] 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.

[0115] 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.

[0116] 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.

[0117] 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 1a process or multiple processes and / or boxes Figure 1 A device that provides the functions specified in a block or multiple blocks.

[0118] 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.

[0119] 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.

[0120] 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.

[0121] 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 reducing power grid load, characterized by: include, When the power grid is disturbed, the deviation value of the power grid at the first moment is obtained; Determine the relationship between the deviation value at the first moment and the active response threshold; Execute an operation corresponding to the relationship according to the relationship; The obtaining of the first-time deviation value of the power grid includes, when the power grid is disturbed, if the first-time deviation value of the power grid exceeds the deviation range allowed for normal operation of the power grid, determining whether the first-time deviation value is higher than an active response action threshold; The deviation value is a frequency deviation value or a voltage deviation value; The first moment corresponds to the moment when the power grid is disturbed; The determining of the relationship between the first moment deviation value and the active response threshold value includes: If the deviation value at the first moment is higher than the active response action threshold, determining the smart meter nodes whose voltage sensitivity is less than or equal to the set threshold, triggering the smart meter nodes whose voltage sensitivity is less than or equal to the set threshold, and performing active response actions in descending order of the load shedding sensitivity indicators of the smart meter nodes at the first moment; After the smart meter node completes the active response action, obtaining a deviation value of the power grid at a second moment, and determining whether the deviation value at the second moment is higher than a load shedding action threshold; The second moment corresponds to the moment when the smart meter node completes the active response action; The smart meter node performs an active response action including triggering the smart meter node to actively interrupt an interruptible load; If the deviation value at the second moment is higher than the load shedding action condition threshold, load shedding control is performed on the smart meter nodes according to the load shedding sensitivity indicators of the smart meter nodes at the second moment from high to low; Before the step of determining a smart meter node whose voltage sensitivity is less than or equal to a set threshold, the method further includes: Change the active power of the smart meter node to be requested; Obtaining the sum of active power changes of the remaining smart meter nodes except the smart meter node to be determined; Dividing the sum of the active power changes of the remaining smart meter nodes by the active power change of the smart meter node to be determined, and using the obtained value as the voltage sensitivity of the smart meter node to be determined; Calculating the instantaneous load-to-ground admittance of the smart meter node based on the voltage operating value, frequency operating value, active power operating value, and reactive power operating value of the smart meter node at the first moment, and calculating the load shedding sensitivity index of the smart meter node based on the instantaneous load-to-ground admittance; The voltage sensitivity is expressed as: Where ΔP UI represents the voltage sensitivity of the smart meter node i to be determined; ΔP i represents the active power change of the smart meter node i to be determined; represents the sum of the active power changes of the smart meter nodes except the smart meter node i; The load shedding sensitivity index is expressed as: Among them, f i (t) represents the real-time frequency of smart meter node i; f N Indicates the rated frequency of the power system; Y ref_i (t) and Y imf_i (t) represents R i The real and imaginary parts of (t); S i (t) represents the load shedding sensitivity index, Y i (t) represents the instantaneous load-to-ground admittance of smart meter node i.

2. The power grid load reduction method according to claim 1, wherein: The performing load shedding control on the smart meter nodes includes, for the smart meter nodes to be cut off, cutting off the load on the smart meter nodes to be cut off in order of load frequency adjustment coefficient from low to high.

3. The power grid load reduction method according to claim 2, wherein: The performing load shedding control on the smart meter nodes further includes grouping the plurality of smart meter nodes in descending order of the load shedding sensitivity indicators of the smart meter nodes at the second moment to obtain a plurality of groups; After executing load shedding control on the smart meter nodes in a group, determining whether the deviation value at the third moment exceeds the deviation range allowed for normal operation of the power grid; The third moment corresponds to the moment after a group of nodes are subjected to load shedding control; if the deviation value at the third moment still exceeds the deviation range allowed for normal operation of the power grid, load shedding control is performed on the smart meter nodes in the next group until the deviation value returns to the deviation range allowed for normal operation.

4. A power grid load shedding device, applying a power grid load shedding method according to any one of claims 1 to 3, characterized in that: include: a disturbance detection module, configured to, when a power grid is disturbed, determine whether the deviation value of the power grid at a first moment exceeds an active response action threshold if the deviation value of the power grid at the first moment exceeds a deviation range allowed for normal power grid operation; the deviation value being a frequency deviation value or a voltage deviation value; the first moment corresponding to the moment when the power grid is disturbed; an active response module, configured to, if the deviation value at the first moment is higher than an active response action threshold, determine a smart meter node whose voltage sensitivity is less than or equal to a set threshold, trigger the smart meter nodes whose voltage sensitivity is less than or equal to the set threshold, and perform an active response action in descending order of the load shedding sensitivity indicators of the smart meter nodes at the first moment; a forced load shedding module, configured to obtain a deviation value of the power grid at a second moment after the smart meter node completes the active response action, and determine whether the deviation value at the second moment is higher than a load shedding action threshold; The second moment corresponds to the moment when the smart meter node completes the active response action; If the deviation value at the second moment is higher than the load shedding action condition threshold, load shedding control is performed on the smart meter nodes according to the load shedding sensitivity indicators of the smart meter nodes at the second moment in descending order.

5. A computer device, characterized in that: The method comprises a memory and a processor, wherein the memory stores a computer program, and is characterized in that when the processor executes the computer program, the method according to any one of claims 1 to 3 is implemented.

6. A computer-readable storage medium, characterized in that: include, The computer-readable storage medium stores a computer program, and when the computer program is executed by a processor, the method according to any one of claims 1 to 3 is implemented.

7. A computer program product, characterized in that: The product comprises a computer program, which implements the method according to any one of claims 1 to 3 when executed by a processor.

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