CN115642608B - Power grid load reduction method, device, equipment, storage medium and computer program product - Google Patents
Power grid load reduction method, device, equipment, storage medium and computer program productInfo
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- CN115642608B CN115642608B CN202211327338.9A CN202211327338A CN115642608B CN 115642608 B CN115642608 B CN 115642608B CN 202211327338 A CN202211327338 A CN 202211327338A CN 115642608 B CN115642608 B CN 115642608B
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B70/00—Technologies for an efficient end-user side electric power management and consumption
- Y02B70/30—Systems integrating technologies related to power network operation and communication or information technologies for improving the carbon footprint of the management of residential or tertiary loads, i.e. smart grids as climate change mitigation technology in the buildings sector, including also the last stages of power distribution and the control, monitoring or operating management systems at local level
- Y02B70/3225—Demand response systems, e.g. load shedding, peak shaving
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y04—INFORMATION OR COMMUNICATION TECHNOLOGIES HAVING AN IMPACT ON OTHER TECHNOLOGY AREAS
- Y04S—SYSTEMS INTEGRATING TECHNOLOGIES RELATED TO POWER NETWORK OPERATION, COMMUNICATION OR INFORMATION TECHNOLOGIES FOR IMPROVING THE ELECTRICAL POWER GENERATION, TRANSMISSION, DISTRIBUTION, MANAGEMENT OR USAGE, i.e. SMART GRIDS
- Y04S20/00—Management or operation of end-user stationary applications or the last stages of power distribution; Controlling, monitoring or operating thereof
- Y04S20/20—End-user application control systems
- Y04S20/222—Demand response systems, e.g. load shedding, peak shaving
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Abstract
本发明公开了电网减载方法、装置、设备、存储介质和计算机程序产品包括，在电网受到扰动时，根据其频率偏差值或电压偏差值的大小，采取先进行主动响应再进行强制减载的减载方法，并利用智能表计节点的电压灵敏度和减载敏感指标的大小，按特定的顺序执行电网减载过程，计及了不同智能表计节点间的调节特性差异，并能够综合有功功率和无功功率之间的交互影响，从而更多地发挥智能表计节点自身的调节作用，降低了减载过程中的切除负荷代价。
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
The present invention relates to the technical field of power systems, and in particular to a method, an apparatus, a device, a storage medium and a computer program product for grid load shedding, an apparatus, a computer device, a storage medium and a computer program product.
Background
When the power system has serious faults and has the problems of insufficient work or reactive power, the frequency or the voltage of the power system can be severely reduced, and the load shedding treatment is needed to keep the frequency and the voltage of the power system stable so as to prevent the power failure accident of the power system.
The existing power grid load shedding method does not consider the interaction effect of the voltage and the frequency at the nodes of the intelligent meter through the active power and the reactive power, only depends on local frequency or voltage measurement, and is difficult to fully account the difference between different load nodes on the frequency adjustment characteristic and the voltage adjustment characteristic, the situation of overstock is easy to occur when load shedding occurs, and larger load shedding cost is generated.
Disclosure of Invention
This section is intended to outline some aspects of embodiments of the application and to briefly introduce some preferred embodiments. Some simplifications or omissions may be made in this section as well as in the description of the application and in the title of the application, which may not be used to limit the scope of the application.
The present invention has been made in view of the above-described problems occurring in the prior art.
Accordingly, the present invention provides a power grid load shedding method, apparatus, device, storage medium and computer program product, capable of exerting the adjustment function of the smart meter node itself to reduce the load shedding cost.
In order to solve the technical problems, the invention provides a power grid load shedding method, which comprises the following steps:
When the power grid is disturbed, acquiring a first moment deviation value of the power grid;
judging the relation between the first moment deviation value and the active response threshold value;
and executing the operation corresponding to the relation according to the relation.
The method for reducing the load of the power grid comprises the steps that when the power grid is disturbed, if the deviation value of the power grid at the first moment exceeds the deviation range allowed by the normal operation of the power grid, whether the deviation value at the first moment is higher than an active response action threshold value is judged;
the deviation value is a frequency deviation value or a voltage deviation value;
the first time corresponds to a time when the grid is disturbed.
As a preferable scheme of the power grid load shedding method, the relation between the first moment deviation value and the active response threshold value is judged to comprise,
If the deviation value of the first moment is higher than the active response action threshold, determining an intelligent meter node with voltage sensitivity smaller than or equal to a set threshold, triggering the intelligent meter node with voltage sensitivity smaller than or equal to the set threshold, and executing the active response action according to the order of the load shedding sensitivity index of the intelligent meter node at the first moment from low to high;
after the intelligent meter node executes the active response action, acquiring a deviation value of the power grid at a second moment, and judging whether the deviation value at the second moment is higher than a load shedding action threshold value or not;
the second moment corresponds to the moment when the intelligent meter node finishes the active response action;
the intelligent meter node performing the active response action includes triggering the intelligent meter node to actively interrupt the interruptible load.
And if the deviation value of the second moment is higher than the load shedding action condition threshold value, executing load shedding control on the intelligent meter node according to the order of the load shedding sensitivity index of the intelligent meter node at the second moment from high to low.
As a preferred embodiment of the power grid load shedding method according to the present invention, before the step of determining the smart meter node having the voltage sensitivity less than or equal to the set threshold, the method further comprises,
Changing the active power of the node of the intelligent meter to be solved;
Acquiring the sum of active power variation amounts of other intelligent meter nodes except the intelligent meter node to be solved;
dividing the sum of the active power variation of the rest intelligent meter nodes by the active power variation of the intelligent meter node to be calculated, and taking the calculated value as the voltage sensitivity of the intelligent meter node to be calculated;
Calculating the instantaneous load admittance to the ground of the intelligent meter node according to the voltage operation value, the frequency operation value, the active power operation value and the reactive power operation value of the intelligent meter node at the first moment, and calculating the load shedding sensitivity index of the intelligent meter node according to the instantaneous load admittance to the ground.
The method, the device, the equipment, the storage medium and the computer program product for reducing load of the power grid are used for reducing load of the power grid, wherein the step of executing load reduction control on the intelligent meter nodes comprises the step of aiming at the intelligent meter nodes to be cut, and cutting off the load on the intelligent meter nodes to be cut according to the order of the load frequency adjustment coefficients from low to high.
The method for carrying out load shedding control on the intelligent meter nodes further comprises the steps of grouping a plurality of intelligent meter nodes according to the order of load shedding sensitive indexes of the intelligent meter nodes at a second moment from high to low to obtain a plurality of groups;
After load shedding control is carried out on the intelligent meter nodes in a group, judging whether the deviation value at the third moment exceeds the deviation range allowed by normal operation of the power grid;
and if the deviation value of the third moment still exceeds the deviation range allowed by the normal operation of the power grid, the load shedding control is executed on the intelligent meter nodes in the lower group until the deviation value is restored to be within the deviation range allowed by the normal operation.
The application provides a power grid load shedding device, which comprises:
as a preferable scheme of the power grid load shedding device, the invention comprises that,
The disturbance detection module is used for judging whether the deviation value of the power grid at the first moment is higher than an active response action threshold value or not if the deviation value of the power grid at the first moment exceeds the deviation range allowed by the normal operation of the power grid when the power grid is disturbed, wherein the deviation value is a frequency deviation value or a voltage deviation value;
The active response module is used for determining an intelligent meter node with voltage sensitivity smaller than or equal to a set threshold value if the deviation value of the first moment is higher than an active response action threshold value, triggering the intelligent meter node with voltage sensitivity smaller than or equal to the set threshold value, and executing an active response action according to the order of the load shedding sensitivity index of the intelligent meter node at the first moment from low to high;
The forced load shedding module is used for acquiring a deviation value of the power grid at a second moment after the intelligent meter node executes the active response action, judging whether the deviation value at the second moment is higher than a load shedding action threshold value, wherein the second moment corresponds to the moment when the intelligent meter node executes the active response action, and executing load shedding control on the intelligent meter node according to the order of the load shedding sensitive index of the intelligent meter node at the second moment from high to low if the deviation value at the second moment is higher than the load shedding action condition threshold value.
The application provides a computer device comprising a memory and a processor, the memory storing a computer program, the processor executing the computer program to perform the steps of:
as a preferred embodiment of the grid load shedding computer device according to the invention, the method comprises the steps of,
When the power grid is disturbed, if the deviation value of the power grid at the first moment exceeds the deviation range allowed by the normal operation of the power grid, judging whether the deviation value at the first moment is higher than an active response action threshold value or not;
If the deviation value of the first moment is higher than the active response action threshold, determining an intelligent meter node with voltage sensitivity smaller than or equal to the set threshold, triggering the intelligent meter node with voltage sensitivity smaller than or equal to the set threshold, and executing the active response action according to the order of the load shedding sensitivity index of the intelligent meter node at the first moment from low to high;
after the intelligent meter node performs the active response action, acquiring a deviation value of the power grid at a second moment, and judging whether the deviation value at the second moment is higher than a load shedding action threshold value or not;
And if the deviation value of the second moment is higher than the load shedding action condition threshold value, executing load shedding control on the intelligent meter node according to the order of the load shedding sensitive index of the intelligent meter node at the second moment from high to low.
The present application provides a computer readable storage medium having stored thereon a computer program which when executed by a processor performs the steps of:
As a preferred embodiment of the grid load shedding computer readable storage medium according to the present invention, the method comprises,
When the power grid is disturbed, if the deviation value of the power grid at the first moment exceeds the deviation range allowed by the normal operation of the power grid, judging whether the deviation value at the first moment is higher than an active response action threshold value or not;
the deviation value is a frequency deviation value or a voltage deviation value;
The first time corresponds to a time when the power grid is disturbed;
If the deviation value of the first moment is higher than the active response action threshold, determining an intelligent meter node with voltage sensitivity smaller than or equal to the set threshold, triggering the intelligent meter node with voltage sensitivity smaller than or equal to the set threshold, and executing the active response action according to the order of the load shedding sensitivity index of the intelligent meter node at the first moment from low to high;
after the intelligent meter node performs the active response action, acquiring a deviation value of the power grid at a second moment, and judging whether the deviation value at the second moment is higher than a load shedding action threshold value or not;
And if the deviation value of the second moment is higher than the load shedding action condition threshold value, executing load shedding control on the intelligent meter node according to the order of the load shedding sensitive index of the intelligent meter node at the second moment from high to low.
The present application provides a computer program product having a computer program stored thereon, the computer program being executed by a processor to:
when the power grid is disturbed, if the deviation value of the power grid at the first moment exceeds the deviation range allowed by the normal operation of the power grid, judging whether the deviation value at the first moment is higher than an active response action threshold value or not;
If the deviation value of the first moment is higher than the active response action threshold, determining an intelligent meter node with voltage sensitivity smaller than or equal to the set threshold, triggering the intelligent meter node with voltage sensitivity smaller than or equal to the set threshold, and executing the active response action according to the order of the load shedding sensitivity index of the intelligent meter node at the first moment from low to high;
after the intelligent meter node performs the active response action, acquiring a deviation value of the power grid at a second moment, and judging whether the deviation value at the second moment is higher than a load shedding action threshold value or not;
And if the deviation value of the second moment is higher than the load shedding action condition threshold value, executing load shedding control on the intelligent meter node according to the order of the load shedding sensitive index of the intelligent meter node at the second moment from high to low.
The method, the device, the computer equipment, the storage medium and the computer program product for reducing the load of the power grid have the beneficial effects that when the power grid is disturbed, the method for reducing the load by performing active response and then forced load reduction is adopted according to the frequency deviation value or the voltage deviation value of the power grid, the voltage sensitivity and the load reduction sensitivity index of the intelligent meter nodes are utilized to execute the load reduction process of the power grid according to a specific sequence, the adjustment characteristic difference among different intelligent meter nodes is considered, and the interaction effect between active power and reactive power can be synthesized, so that the self-regulation effect of the intelligent meter nodes is exerted more, and the load shedding cost in the load reduction process is reduced.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings that are needed in the description of the embodiments will be briefly described below, it being obvious that the drawings in the following description are only some embodiments of the present invention, and that other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art. Wherein:
Fig. 1 is a schematic flow chart of a power grid load shedding method according to an embodiment of the present invention;
fig. 2 is a flowchart illustrating steps for calculating voltage sensitivity according to an embodiment of the present invention.
Fig. 3 is a flow chart of a power grid load shedding method according to an embodiment of the present invention;
fig. 4 is a block diagram of a power grid load shedding device according to an embodiment of the present invention;
Fig. 5 is an internal structural diagram of a computer device according to an embodiment of the present invention.
Detailed Description
So that the manner in which the above recited objects, features and advantages of the present invention can be understood in detail, a more particular description of the invention, briefly summarized above, may be had by reference to the embodiments, some of which are illustrated in the appended drawings. All other embodiments, which can be made by one of ordinary skill in the art based on the embodiments of the present invention without making any inventive effort, shall fall within the scope of the present invention.
In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention, but the present invention may be practiced in other ways other than those described herein, and persons skilled in the art will readily appreciate that the present invention is not limited to the specific embodiments disclosed below.
Further, reference herein to "one embodiment" or "an embodiment" means that a particular feature, structure, or characteristic can be included in at least one implementation of the invention. The appearances of the phrase "in one embodiment" in various places in the specification are not necessarily all referring to the same embodiment, nor are separate or alternative embodiments mutually exclusive of other embodiments.
While the embodiments of the present invention have been illustrated and described in detail in the drawings, the cross-sectional view of the device structure is not to scale in the general sense for ease of illustration, and the drawings are merely exemplary and should not be construed as limiting the scope of the invention. In addition, the three-dimensional dimensions of length, width and depth should be included in actual fabrication.
Also in the description of the present invention, it should be noted that the orientation or positional relationship indicated by the terms "upper, lower, inner and outer", etc. are based on the orientation or positional relationship shown in the drawings, are merely for convenience of describing the present invention and simplifying the description, and do not indicate or imply that the apparatus or elements referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as limiting the present invention. Furthermore, the terms "first, second, or third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.
The terms "mounted, connected, and coupled" as used herein, unless otherwise specifically indicated and defined, shall be construed broadly and include, for example, fixed, removable, or integral, as well as mechanical, electrical, or direct, as well as indirect via intermediaries, or communication between two elements. The specific meaning of the above terms in the present invention will be understood in specific cases by those of ordinary skill in the art.
Example 1
Referring to fig. 1-5, a first embodiment of the present invention provides a grid load shedding method, apparatus, device, storage medium, and computer program product, comprising:
s1, when the power grid is disturbed, if the deviation value of the power grid at the first moment exceeds the deviation range allowed by the normal operation of the power grid, judging whether the deviation value at the first moment is higher than an active response action threshold value, wherein the deviation value is a frequency deviation value or a voltage deviation value, and the first moment corresponds to the disturbed moment of the power grid.
Specifically, when the power grid is disturbed, the frequency and the voltage of the power grid drop, if the deviation value between the frequency or the voltage of the power grid and the standard frequency or the standard voltage exceeds the deviation range allowed by the normal operation of the power grid, whether the power grid is higher than an active response action threshold value or not is judged according to the deviation value of the power grid at the disturbance moment so as to determine whether the active response is needed or not.
If the deviation value of the first moment is higher than the active response action threshold, determining an intelligent meter node with voltage sensitivity smaller than or equal to the set threshold, triggering the intelligent meter node with voltage sensitivity smaller than or equal to the set threshold, and executing the active response action according to the order of the load shedding sensitivity index of the intelligent meter node at the first moment from low to high.
Specifically, if the deviation value of the disturbance moment of the power grid is higher than the active response action threshold, the intelligent meter node will perform active response. Considering the interaction between active 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 high, it indicates that when the load on the smart meter node is interrupted, the voltage of the smart meter node and the near area thereof may be raised, so that the active power increment of the remaining smart meter nodes exceeds the interrupted load amount, i.e. the active response of the smart meter node has a negative effect risk. Thus, the smart meter node that determines that the voltage sensitivity is less than or equal to the set threshold participates in the active response.
In order to reduce the risk of negative effects, the insensitive nodes are preferentially regulated, and then the intelligent meter nodes participating in the active response execute the active response action according to the order of the load shedding sensitivity indexes from low to high at the moment that the power grid is disturbed. The load shedding sensitive index is calculated according to the on-site information of each intelligent meter node.
After the intelligent meter node finishes the active response action, acquiring a deviation value of the power grid at a second moment, and judging whether the deviation value at the second moment is higher than a load shedding action threshold value, wherein the second moment corresponds to the moment when the intelligent meter node finishes the active response action.
Specifically, after the intelligent meter node completes the active response, if the frequency or the voltage of the power grid is not restored to the normal operation range and falls down when being disturbed, the deviation value of the power grid at the moment when the active response action is executed is obtained, and whether the deviation value is higher than the load shedding action threshold value is judged to determine whether the load shedding control is needed to be executed. The load shedding action threshold is higher than the active response action threshold.
And if the deviation value of the second moment is higher than the load shedding action condition threshold value, executing load shedding control on the intelligent meter node according to the order of the load shedding sensitive index of the intelligent meter node at the second moment from high to low.
Specifically, if the deviation value of the moment when the intelligent meter node finishes executing the active response action is higher than the load shedding action threshold value, forced load shedding is performed. The greater the load shedding sensitivity index of the smart meter node, the more advantageous it is to cut off the equivalent load at the smart meter node to control the stability of the frequency or voltage of the power grid. Therefore, the load shedding control is performed on the intelligent meter node according to the order of the load shedding sensitive indexes of the intelligent meter node from high to low at the moment when the active response action is performed.
S2, changing the active power of the intelligent meter node to be solved, obtaining the sum of the active power variation of the other intelligent meter nodes except the intelligent meter node to be solved, dividing the sum of the active power variation of the other intelligent meter nodes by the active power variation of the intelligent meter node to be solved, and taking the obtained value as the voltage sensitivity of the intelligent meter node to be solved.
Further, in an electrical power system, it is generally considered that active power affects frequency and reactive power affects voltage. In the actual working process of the power system, the active power can influence the voltage, and the reactive power can influence the frequency. Thus, it is desirable to consider the voltage and frequency at the smart meter nodes through the interaction between active and reactive power, which is also taken into account when calculating the voltage sensitivity of each smart meter node.
Illustratively, the voltage sensitivity of a smart meter node can be calculated by:
Wherein, deltaP UI represents the voltage sensitivity of the node i of the intelligent meter to be calculated, deltaP i represents the active power variation of the node i of the intelligent meter to be calculated; And the sum of the active power variation amounts of the rest intelligent meter nodes except the intelligent meter node i is represented.
Specifically, the voltage operating value, the frequency operating value, the active power operating value and the reactive power operating value are in-situ information at the nodes of the intelligent meter. According to the on-site information of each intelligent meter node, the instantaneous load earth admittance of each intelligent meter node can be calculated, and according to the instantaneous load earth admittance of each intelligent meter node, the sensitivity of each intelligent meter node in the frequency change, namely the load shedding sensitivity index, is obtained. Wherein the first time corresponds to a time when the grid is disturbed. And immediately acquiring real-time load shedding sensitive indexes of each intelligent meter node after the power grid is disturbed.
Illustratively, the instantaneous load-to-ground admittance of the smart meter node i may be calculated by:
Wherein, the P 0i and Q 0i represent the initial active power and the initial reactive power of the smart meter node i under normal operation, and P i (t) and Q i (t) represent the real-time active power and the reactive power of the smart meter node i.
Illustratively, the load shedding sensitivity index of a smart meter node may be calculated by:
Si(t)＝|Ri(t)|2＝Yref_i(t)2+Yimf_i(t)2
Wherein f i (t) represents the real-time frequency of the intelligent meter node i, f N represents the rated frequency of the power system, Y ref_i (t) and Y imf_i (t) respectively represent the real part and the imaginary part of R i (t), and S i (t) represents the load shedding sensitivity index.
According to the application, the voltage sensitivity of each intelligent meter node is calculated and obtained in sequence based on a perturbation method, active power on the intelligent meter node to be calculated is subjected to active fine adjustment, and the active power variation of the other intelligent meter nodes before and after the active power on the intelligent meter node to be calculated is recorded. And dividing the sum of the active power variation amounts of the rest intelligent meter nodes by the active power variation amount of the intelligent meter node to be calculated, and taking the calculated value as the voltage sensitivity of the intelligent meter node to be calculated.
Example 2
Referring to fig. 1-5, for one embodiment of the present invention, a grid load shedding method, apparatus, device, storage medium, and computer program product are provided, scientifically demonstrated through experimentation in order to verify the benefits of the present invention.
The intelligent meter nodes are grouped according to the method shown in fig. 3, the number of the intelligent meter nodes is controlled to be reduced in each round, the load reduction is carried out for multiple rounds, whether the power grid is restored to a normal operation state is analyzed after the load reduction is carried out in each round, the occurrence of over-cut problems in the load reduction is reduced, the cost of load shedding is reduced, when the power grid is disturbed, the interruptible load at each intelligent meter node is determined, then the voltage sensitivity of each intelligent meter node is determined based on perturbation, and the load reduction sensitivity index of each intelligent meter node is calculated in real time.
And judging whether the frequency deviation value or the voltage deviation value of the power grid is higher than the active response action threshold value of the power grid, and if so, entering the next step. If the load sensitivity index is not exceeded, repeating the steps, continuously calculating the load shedding sensitivity index of each load node in real time, screening out intelligent meter nodes with voltage sensitivity smaller than or equal to a set threshold, and executing active response actions by the intelligent meter nodes according to the order of the load shedding sensitivity index from low to high. And if the voltage sensitivity of the intelligent meter node is greater than the set threshold, cancelling the active response of the intelligent meter node. Illustratively, the set threshold for voltage sensitivity is 1.0.
And judging whether the frequency deviation value or the voltage deviation value of the power grid is higher than a load shedding action threshold value of the power grid, and if so, entering the next step. If the load shedding sensitivity index of each load node is not exceeded, returning to the previous step, and continuously calculating the load shedding sensitivity index of each load node in real time.
And performing load shedding control on the intelligent meter nodes according to the order of the load shedding sensitive indexes of the intelligent meter nodes from high to low. The load shedding control process comprises the steps of dividing a plurality of intelligent meter nodes into a plurality of groups, executing load shedding control on each group of intelligent meter nodes, judging whether the deviation value of the voltage or the frequency of the power grid still exceeds the deviation range allowed by the normal operation of the power grid after each group of load shedding is completed, and ending the load shedding process until the power grid is restored to the normal operation state.
The comparison of some of the beneficial effects mentioned in the present invention with the effects of the conventional art is shown in the following table:
Fig. 4 is a schematic diagram of a power grid load shedding device, which includes a disturbance detection module, configured to determine, when a power grid is disturbed, if a deviation value of the power grid at a first moment exceeds a deviation range allowed by normal operation of the power grid, whether the deviation value at the first moment is higher than an active response action threshold;
The active response module is used for determining an intelligent meter node with voltage sensitivity smaller than or equal to a set threshold value if the deviation value of the first moment is higher than the active response action threshold value, triggering the intelligent meter node with voltage sensitivity smaller than or equal to the set threshold value, and executing the active response action according to the order of the load shedding sensitivity index of the intelligent meter node at the first moment from low to high;
The forced load shedding module is used for acquiring the deviation value of the power grid at a second moment after the intelligent meter node executes the active response action, judging whether the deviation value at the second moment is higher than a load shedding action threshold value, wherein the second moment corresponds to the moment when the intelligent meter node executes the active response action, and executing load shedding control on the intelligent meter node according to the order of the load shedding sensitive index of the intelligent meter node at the second moment from high to low if the deviation value at the second moment is higher than the load shedding action condition threshold value.
In the embodiment, the device further comprises a voltage sensitivity calculation module, wherein the voltage sensitivity calculation module is used for changing the active power of the intelligent meter node to be calculated, obtaining the sum of the active power variation of all the intelligent meter nodes except the intelligent meter node to be calculated, dividing the sum of the active power variation of all the intelligent meter nodes by the active power variation of the intelligent meter node to be calculated, and taking the calculated value as the voltage sensitivity of the intelligent meter node to be calculated.
In this embodiment, the device further includes a load shedding sensitive index calculation module, configured to calculate an instantaneous load to ground admittance of the intelligent meter node according to the voltage operation value, the frequency operation value, the active power operation value, and the reactive power operation value of the intelligent meter node at the first moment, and calculate a load shedding sensitive index of the intelligent meter node according to the instantaneous load to ground admittance.
In this embodiment, the active response module is further configured to trigger the smart meter node to actively interrupt the interruptible load.
In this embodiment, the forced load shedding module is further configured to cut loads on the node of the to-be-cut intelligent meter according to the order of the load frequency adjustment coefficients from low to high, with respect to the node of the to-be-cut intelligent meter.
In this embodiment, the forced load shedding module is further configured to group the plurality of smart meter nodes according to a order of load shedding sensitivity indexes of the smart meter nodes from high to low at a second time, to obtain a plurality of groups, determine, after executing load shedding control on the smart meter nodes in a group, whether a deviation value at a third time exceeds a deviation range allowed by normal operation of the power grid, where the third time is a time corresponding to the group after executing the load shedding control, and if the deviation value at the third time still exceeds the deviation range allowed by normal operation of the power grid, execute load shedding control on the smart meter nodes in a lower group until the deviation value is restored to be within the deviation range allowed by normal operation.
For specific limitations of the grid load shedding device, reference may be made to the above limitation of the grid load shedding method, and no further description is given here. The modules in the grid load shedding device can be realized in whole or in part by software, hardware and a combination thereof. The above modules may be embedded in hardware or may be independent of a processor in the computer device, or may be stored in software in a memory in the computer device, so that the processor may call and execute operations corresponding to the above modules.
Fig. 5 shows a computer device provided by the present invention. The computer device includes a processor, a memory, and a network interface connected by a system bus. Wherein the processor of the computer device is configured 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, computer programs, and a database. The internal memory provides an environment for the operation of the operating system and computer programs in the non-volatile storage media. The database of the computer device is used for storing data related to the grid load shedding method. The network interface of the computer device is used for communicating with an external terminal through a network connection. The computer equipment also comprises an input/output interface, wherein the input/output interface is a connecting circuit for exchanging information between the processor and the external equipment, and the input/output interface is connected with the processor through a bus and is called as an I/O interface for short. The computer program is executed by a processor to implement a grid load shedding method.
It will be appreciated by those skilled in the art that the structure shown in FIG. 5 is merely a block diagram of some of the structures associated with the present inventive arrangements and is not limiting of the computer device to which the present inventive arrangements may be applied, and that a particular computer device may include more or fewer components than shown, or may combine some of the components, or have a different arrangement of components.
In this embodiment, a computer device is provided, including a memory storing a computer program and a processor implementing the steps of the method embodiments described above when the processor executes the computer program.
In this embodiment, a computer-readable storage medium is provided, on which a computer program is stored which, when executed by a processor, implements the steps of the respective method embodiments described above.
In this embodiment, a computer program product is provided, on which a computer program is stored, which computer program is executed by a processor to perform the steps of the respective method embodiments described above.
The invention relates to a power grid load shedding method, a device, equipment, a storage medium and a computer program product, when a power grid is disturbed, the power grid load shedding method is adopted according to the frequency deviation value or the voltage deviation value of the power grid, active response is firstly carried out, then forced load shedding is carried out, the voltage sensitivity of intelligent meter nodes and the size of load shedding sensitive indexes are utilized, the power grid load shedding process is carried out according to a specific sequence, the adjustment characteristic difference among different intelligent meter nodes is considered, and the interaction influence between active power and reactive power can be integrated, so that the self adjustment effect of the intelligent meter nodes is exerted more, and the load shedding cost in the load shedding process is reduced.
It should be noted that the above embodiments are only for illustrating the technical solution of the present invention and not for limiting the same, and although the present invention has been described in detail with reference to the preferred embodiments, it should be understood by those skilled in the art that the technical solution of the present invention may be modified or substituted without departing from the spirit and scope of the technical solution of the present invention, which is intended to be covered in the scope of the claims of the present invention.
It should be noted that the above embodiments are only for illustrating the technical solution of the present invention and not for limiting the same, and although the present invention has been described in detail with reference to the preferred embodiments, it should be understood by those skilled in the art that the technical solution of the present invention may be modified or substituted without departing from the spirit and scope of the technical solution of the present invention, which is intended to be covered in the scope of the claims of the present invention.
It will be appreciated by those skilled in the art that embodiments of the present application may be provided as a method, system, or computer program product. Accordingly, the present application may take the form of an entirely hardware embodiment, an entirely software embodiment or an embodiment combining software and hardware aspects. Furthermore, the present application may take the form of a computer program product embodied on one or more computer-usable storage media (including, but not limited to, disk storage, CD-ROM, optical storage, and the like) having computer-usable program code embodied therein. The scheme in the embodiment of the application can be realized by adopting various computer languages, such as object-oriented programming language Java, an transliteration script language JavaScript and the like.
The present application is described with reference to flowchart illustrations and/or block diagrams of methods, apparatus (systems) and computer program products according to embodiments of the application. It will be understood that each flow and/or block of the flowchart illustrations and/or block diagrams, and combinations of flows and/or blocks in the flowchart illustrations and/or block diagrams, can be implemented by computer program instructions. These computer program instructions may 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, create means for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.
These computer program instructions may also be stored in a computer-readable memory that can direct a computer or other programmable data processing apparatus to function in a particular manner, such that the instructions stored in the computer-readable memory produce an article of manufacture including instruction means which implement the function specified in the flowchart flow or flows and/or block diagram block or blocks.
These computer program instructions may also be loaded onto a computer or other programmable data processing apparatus to cause a series of operational steps to be performed on the computer or other programmable apparatus to produce a computer implemented process such that the instructions which execute on the computer or other programmable apparatus provide steps for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.
While preferred embodiments of the present application have been described, additional variations and modifications in those embodiments may occur to those skilled in the art once they learn of the basic inventive concepts. It is therefore intended that the following claims be interpreted as including the preferred embodiments and all such alterations and modifications as fall within the scope of the application.
It will be apparent to those skilled in the art that various modifications and variations can be made to the present application without departing from the spirit or scope of the application. Thus, it is intended that the present application also include such modifications and alterations insofar as they come within the scope of the appended claims or the equivalents thereof.
Claims (7)
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