CN110601208A - Accurate load control method and system based on multi-dimensional load attributes - Google Patents

Accurate load control method and system based on multi-dimensional load attributes Download PDF

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Publication number
CN110601208A
CN110601208A CN201910862694.2A CN201910862694A CN110601208A CN 110601208 A CN110601208 A CN 110601208A CN 201910862694 A CN201910862694 A CN 201910862694A CN 110601208 A CN110601208 A CN 110601208A
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load
control
loads
substation
sequence
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CN110601208B (en
Inventor
程维杰
程韧俐
范伟松
黄双
吴新
刘东洋
朱传宏
徐捷
王娟
熊峰
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Shenzhen Power Supply Bureau Co Ltd
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Shenzhen Power Supply Bureau Co Ltd
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    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J3/00—Circuit arrangements for ac mains or ac distribution networks
    • H02J3/12—Circuit arrangements for ac mains or ac distribution networks for adjusting voltage in ac networks by changing a characteristic of the network load
    • H02J3/14—Circuit arrangements for ac mains or ac distribution networks for adjusting voltage in ac networks by changing a characteristic of the network load by switching loads on to, or off from, network, e.g. progressively balanced loading
    • 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
    • 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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  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Supply And Distribution Of Alternating Current (AREA)
  • Remote Monitoring And Control Of Power-Distribution Networks (AREA)

Abstract

The invention provides a multi-dimensional load attribute-based accurate load control method, which comprises the steps of determining an evaluation index and endowing the evaluation index with a corresponding weight value; obtaining the scores of all the evaluation indexes, calculating the comprehensive score of the load controlled by the load control terminal according to the weight value of each evaluation index, and obtaining the priority cutting sequence of the load; obtaining the theoretical total amount of the load-cuttable of the stable control substation, and obtaining the preferential cutting sequence of each load control terminal in the same stable control substation according to the comprehensive score of the load; and acquiring the total amount of the controllable load of the stable control main station when the main network connection line or the extra-high voltage direct current fails, distributing the total amount to the corresponding stable control substations, and sequentially cutting off the controlled loads of all the load control terminals with the actual controllable load amount not being 0 according to the preferential cutting-off sequence of all the load control terminals and the controlled loads in the same stable control substation. By implementing the method, the problem that a large amount of over-cutting is easily caused due to overlarge granularity of the basic load cutting unit in the prior art can be solved, the load cutting precision is improved, and the guarantee is provided for the safe operation of a power grid.

Description

Accurate load control method and system based on multi-dimensional load attributes
Technical Field
The invention relates to the technical field of power load control, in particular to a multi-dimensional load attribute-based accurate load control method and system.
Background
The safety and stability control system (hereinafter referred to as stability control system) is a system formed by two or more safety and stability control devices (hereinafter referred to as stability control devices) of a plant station through communication equipment, realizes the stability control of an electric power system in an area or a larger range, and ensures the safe and stable operation of the electric power system by taking measures such as generator tripping, load shedding and the like.
When the receiving end power grid fails, the stability control device mainly maintains the stability of the power grid through a control measure of concentrated load shedding or dispersed load reduction. When an extra-high voltage direct current lock or other serious faults occur, if the voltage of the power grid frequency or the bus voltage of the junction station is reduced to a preset safety value, the power system enters an emergency state. Unbalanced power in the power system is reduced through millisecond-level or second-level load control, and rapid dropping of system frequency under large-scale power shortage can be effectively restrained.
For emergency load shedding control under power grid faults, when a conventional stability control system acts to directly shed 110kV outgoing lines, a large amount of excess shedding is easily caused due to overlarge granularity of a basic load shedding unit, if a 110kV station is directly shed, a large amount of users are likely to have power failure, the problem that part of important users are cut off cannot be avoided, and therefore the problems of high control cost, low user acceptance and the like are solved.
Disclosure of Invention
The technical problem to be solved by the embodiments of the present invention is to provide a method and a system for controlling an accurate load based on a multidimensional load attribute, which can overcome the problem that a large number of excessive load shedding are easily caused by an excessively large granularity of a basic load shedding unit in the prior art, improve the load shedding accuracy, and provide a guarantee for the safe operation of a power grid.
In order to solve the technical problem, an embodiment of the present invention provides a method for controlling a precise load based on a multidimensional load attribute, which is used for a three-level tree network formed by a stability control master station, a plurality of stability control substations and a plurality of load control terminals; each stable control substation is connected with the stable control main station and is also correspondingly connected with a plurality of load control terminals; the method comprises the following steps:
determining a common dimension attribute of a load controlled by each load control terminal, taking the obtained common dimension attribute as an evaluation index, and further endowing each evaluation index with a corresponding weight value;
obtaining scores of all evaluation indexes of the load controlled by each load control terminal, giving a corresponding weight value according to each evaluation index and the obtained scores of all evaluation indexes of the load controlled by each load control terminal, calculating the comprehensive score of the load controlled by each load control terminal, and further obtaining a priority cutting sequence of the load controlled by each load control terminal according to the calculated comprehensive score of the load controlled by each load control terminal;
summarizing the switchable load quantity of each load control terminal in each stable control substation to obtain the theoretical total switchable load quantity of each stable control substation, and obtaining the preferential switching-off sequence of each load control terminal in the same stable control substation according to the calculated comprehensive score of the controlled load of each load control terminal;
the method comprises the steps of obtaining the total amount of the switchable load of the stable control main station when a main network connection line or an extra-high voltage direct current fault occurs, distributing the total amount of the switchable load of the stable control main station to the corresponding stable control substations according to a preset switching weight value of each stable control substation and the obtained theoretical total amount of the switchable load of each stable control substation, obtaining the actual amount of the switchable load of each stable control substation and the actual switchable load of each load control terminal correspondingly connected with the actual amount of the switchable load of each stable control substation, and further sequentially switching off the loads controlled by the load control terminals of which the actual switchable load total amount is not 0 in each stable control substation according to the obtained preferential switching-off sequence of the load control terminals in the same stable control substation and the preferential switching-off sequence of the loads controlled by each load control terminal.
Wherein the common dimensional attributes include outage loss, affiliated power usage, sensitivity, and electrical distance.
The priority cutting sequence of the load controlled by each load control terminal is obtained by arranging the comprehensive scores of the loads controlled by the same load control terminal from large to small.
The priority cutting sequence of each negative control terminal in the same stable control substation is obtained by adding and averaging the comprehensive scores of the loads controlled by each negative control terminal in the same stable control substation and then arranging the average values from large to small.
The specific steps of obtaining the total amount of the switchable loads of the stable control main station during the main network connection line or the extra-high voltage direct current fault, distributing the total amount of the switchable loads of the stable control main station to the corresponding stable control substations according to the preset switching weight value of each stable control substation and the obtained theoretical total amount of the switchable loads of each stable control substation, obtaining the actual amount of the switchable loads of each stable control substation and the actual switchable loads of the load control terminals connected with the stable control substation correspondingly, and further sequentially switching off the loads controlled by the load control terminals of which the actual switchable loads are not 0 in each stable control substation whose actual switchable loads are not 0 according to the obtained priority switching-off sequence of the load control terminals in the same stable control substation and the priority switching-off sequence of the loads controlled by each load control terminal include:
acquiring the total amount of the switchable loads of the stable control main station when a main network connection line or an extra-high voltage direct current fault occurs, and determining the distribution sequence of the total amount of the switchable loads of the stable control main station according to the preset cutting weight value of each stable control substation;
in the distribution sequence, determining the first k +1 stable control substations which are used for distributing the total amount of the switchable loads of the stable control main station; the sum of the theoretical total amount of the cutable loads of the first k stabilized control substations in the distribution sequence is less than the total amount of the cutable loads of the stabilized control main station; the sum of the addition of the theoretical total amount of the load-cuttable of the first k +1 stabilized control substations in the distribution sequence is more than or equal to the total amount of the load-cuttable of the stabilized control main station; k is a positive integer;
correspondingly setting the theoretical total amount of the switchable loads of the first k stabilized control substations in the distribution sequence as the actual total amount of the switchable loads of the respective stabilized control substations, setting the difference value of the sum of the total amount of the switchable loads of the stabilized control master station and the theoretical total amount of the switchable loads of the first k stabilized control substations in the distribution sequence as the actual total amount of the switchable loads of the kth +1 stabilized control substation in the distribution sequence, and setting 0 as the actual total amount of the switchable loads of the stabilized control substations after the kth +1 stabilized control substation in the distribution sequence;
sequentially and progressively forming an initial load shedding set by the loads controlled by the load control terminals in all the stable control substations layer by layer according to the distribution sequence, the obtained priority shedding sequence of the load control terminals in the stable control substations and the priority shedding sequence of the loads controlled by each load control terminal;
obtaining a preferential cutting sequence of each load control terminal in the (k + 1) th stabilized control substation in the distribution sequence, determining the first m +1 load control terminals used for the total practical total amount of the switchable loads of the (k + 1) th stabilized control substation in the preferential cutting sequence of each load control terminal in the (k + 1) th stabilized control substation, and further determining the first n +1 loads to be cut in the (m + 1) th load control terminal according to the preferential cutting sequence of the loads controlled by the (m + 1) th load control terminal; the sum of the addition of the switchable load quantities of the first m load control terminals in the preferential switching-off sequence of the (k + 1) th stabilized control substation is less than the actual switchable load quantity of the (k + 1) th stabilized control substation; the sum of the addition of the switchable load quantities of the first m +1 load control terminals in the preferential switching-off sequence of the (k + 1) th stable control substation is more than or equal to the actual switchable load quantity of the (k + 1) th stable control substation; the sum of the load quantities of the first n loads in the priority cutting sequence of the load controlled by the (m + 1) th load control terminal in the (k + 1) th stable control substation is less than the total load quantity distributed by the (m + 1) th load control terminal in the (k + 1) th stable control substation; the sum of the load quantities of the first n +1 loads in the priority cutting sequence of the loads controlled by the (m + 1) th load control terminal in the (k + 1) th stable control substation is more than or equal to the total load quantity distributed by the (m + 1) th load control terminal in the (k + 1) th stable control substation; m and n are positive integers;
in the initial load shedding set, deleting the loads controlled by all the load control terminals in the stabilized control substations of which the actual total amount of the loads capable of being shed is 0, further deleting the loads controlled by the load control terminals after the (m + 1) th load control terminal corresponding to the preferential shedding sequence of all the load control terminals in the (k + 1) th stabilized control substation and deleting the loads after the (n + 1) th load control terminal corresponding to the preferential shedding sequence of the (m + 1) th load control terminal in the (k + 1) th stabilized control substation, and updating to obtain a final load shedding set;
and sequentially cutting off the loads in the obtained final load cutting set according to the obtained final load cutting set.
The embodiment of the invention also provides a multi-dimensional load attribute-based precise load control system, which is used for a three-level tree network formed by a stable control main station, a plurality of stable control substations and a plurality of load control terminals; each steady accuse sub-station all connects the steady accuse master station, and each steady accuse sub-station still corresponds respectively and is connected with a plurality of burden accuse terminals, includes:
the assignment unit is used for determining a common dimension attribute of the load controlled by each load control terminal, taking the obtained common dimension attribute as an evaluation index, and further endowing each evaluation index with a corresponding weight value;
a load priority removal sequence acquisition unit, configured to acquire scores of evaluation indexes of the load controlled by each negative control terminal, and to assign a corresponding weight value to each evaluation index and the acquired score of each evaluation index of the load controlled by each negative control terminal, to calculate a comprehensive score of the load controlled by each negative control terminal, and further to obtain a priority removal sequence of the load controlled by each negative control terminal according to the calculated comprehensive score of the load controlled by each negative control terminal;
the load control terminal priority cutting sequence acquisition unit is used for summarizing the switchable load capacity of each load control terminal in each stable control substation to obtain the switchable load theoretical total amount of each stable control substation, and obtaining the priority cutting sequence of each load control terminal in the same stable control substation according to the calculated comprehensive score of the controlled load of each load control terminal;
and the load accurate cutting unit is used for acquiring the total amount of the switchable loads of the stable control main station when the main network connection line or the extra-high voltage direct current fails, distributing all the total amount of the switchable loads of the stable control main station to the corresponding stable control substations according to a preset cutting weight value of each stable control substation and the obtained theoretical total amount of the switchable loads of each stable control substation, obtaining the actual amount of the switchable loads of each stable control substation and the actual switchable loads of the load terminals correspondingly connected with the stable control substation, and further cutting the loads of the load terminals of which the actual switchable loads are not 0 in each stable control substation of which the actual amounts of the switchable loads are not 0 in sequence according to the obtained preferential cutting sequence of the load terminals in the same stable control substation and the preferential cutting sequence of the loads controlled by each load terminal.
Wherein the common dimensional attributes include outage loss, affiliated power usage, sensitivity, and electrical distance.
The priority cutting sequence of the load controlled by each load control terminal is obtained by arranging the comprehensive scores of the loads controlled by the same load control terminal from large to small.
The priority cutting sequence of each negative control terminal in the same stable control substation is obtained by adding and averaging the comprehensive scores of the loads controlled by each negative control terminal in the same stable control substation and then arranging the average values from large to small.
Wherein the load accurate cutting unit includes:
the main station load distribution sequence acquisition module is used for acquiring the total amount of the switchable loads of the stable control main station when a main network connection line or an extra-high voltage direct current fault occurs, and determining the distribution sequence of the total amount of the switchable loads of the stable control main station according to the preset cutting weight value of each stable control substation;
the substation screening module is used for determining the first k +1 stable control substations for allocating the total amount of the switchable loads of the stable control main station in the allocation sequence; the sum of the theoretical total amount of the cutable loads of the first k stabilized control substations in the distribution sequence is less than the total amount of the cutable loads of the stabilized control main station; the sum of the addition of the theoretical total amount of the load-cuttable of the first k +1 stabilized control substations in the distribution sequence is more than or equal to the total amount of the load-cuttable of the stabilized control main station; k is a positive integer;
the substation load acquisition module is used for correspondingly setting the switchable load theoretical total amount of the first k stabilized control substations in the distribution sequence as respective switchable load actual total amount, setting the difference value of the sum of the switchable load total amount of the stabilized control master station and the switchable load theoretical total amount of the first k stabilized control substations in the distribution sequence as the switchable load actual total amount of the kth +1 stabilized control substation in the distribution sequence, and setting 0 as the switchable load actual total amount of the stabilized control substations after the kth +1 stabilized control substation in the distribution sequence;
the load shedding set initial module is used for sequentially progressing loads controlled by the load control terminals in all the stable control substations layer by layer to form an initial load shedding set according to the distribution sequence, the obtained priority shedding sequence of the load control terminals in all the stable control substations and the priority shedding sequence of the load controlled by each load control terminal;
the load precision determination module is used for acquiring a priority cutting sequence of each load control terminal in a (k + 1) th stable control substation in the distribution sequence, determining the first m +1 load control terminals used for distributing the practical total amount of the load to be cut of the (k + 1) th stable control substation in the priority cutting sequence of each load control terminal in the (k + 1) th stable control substation, and further determining the first n +1 loads to be cut in the (m + 1) th load control terminal according to the priority cutting sequence of the load controlled by the (m + 1) th load control terminal; the sum of the addition of the switchable load quantities of the first m load control terminals in the preferential switching-off sequence of the (k + 1) th stabilized control substation is less than the actual switchable load quantity of the (k + 1) th stabilized control substation; the sum of the addition of the switchable load quantities of the first m +1 load control terminals in the preferential switching-off sequence of the (k + 1) th stable control substation is more than or equal to the actual switchable load quantity of the (k + 1) th stable control substation; the sum of the load quantities of the first n loads in the priority cutting sequence of the load controlled by the (m + 1) th load control terminal in the (k + 1) th stable control substation is less than the total load quantity distributed by the (m + 1) th load control terminal in the (k + 1) th stable control substation; the sum of the load quantities of the first n +1 loads in the priority cutting sequence of the loads controlled by the (m + 1) th load control terminal in the (k + 1) th stable control substation is more than or equal to the total load quantity distributed by the (m + 1) th load control terminal in the (k + 1) th stable control substation; m and n are positive integers;
a load shedding set final module, configured to delete, in the initial load shedding set, loads controlled by all negative control terminals in the stabilized control substations of which the actual total amount of the cutable loads is 0, further delete loads controlled by the m +1 th negative control terminal after the preferential shedding order of each negative control terminal in the (k + 1) th stabilized control substation corresponds to, delete loads after the n +1 th load after the preferential shedding order of the m +1 th negative control terminal in the (k + 1) th stabilized control substation corresponds to, and update to obtain a final load shedding set;
and the load precise removal module is used for sequentially removing the loads in the obtained final load removal set according to the obtained final load removal set.
The embodiment of the invention has the following beneficial effects:
the invention carries out hierarchical cutting on large-scale interruptible loads in the power grid according to the important grade priority principle, when the last layer of loads meeting the total required cutting amount are cut, the interruptible loads on a shunt switch of a user are sequentially selected and cut according to the priority order of the load control terminal until the total cutting amount is met, the maximum error is the interruptible load amount, the problem that the granularity of a basic cutting load unit is too large and a large amount of excessive cutting is easily caused in the prior art can be solved, the cutting load precision is improved, the hierarchical accurate load control is realized, and the guarantee is provided for the safe operation of the power grid.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is within the scope of the present invention for those skilled in the art to obtain other drawings based on the drawings without inventive exercise.
Fig. 1 is a flowchart of a method for controlling a precision load based on a multidimensional load attribute according to an embodiment of the present invention;
fig. 2 is a schematic diagram of a topological structure of a three-level tree network in an accurate load control method based on a multidimensional load attribute according to an embodiment of the present invention;
fig. 3 is a schematic structural diagram of a precision load control system based on multi-dimensional load attributes according to an embodiment of the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention will be described in further detail with reference to the accompanying drawings.
As shown in fig. 1, a method for controlling a precise load based on a multidimensional load attribute provided in an embodiment of the present invention is used in a three-level tree network (as shown in fig. 2) formed by a stability control master station, a plurality of stability control substations, and a plurality of load control terminals; each stable control substation is connected with the stable control main station and is also correspondingly connected with a plurality of load control terminals; the method comprises the following steps:
step S1, common dimension attributes of the loads controlled by each load control terminal are determined, the obtained common dimension attributes are used as evaluation indexes, and each evaluation index is further endowed with a corresponding weight value;
the specific process is that the common dimensional attributes including the interruption loss, the affiliated power utilization department, the sensitivity, the electrical distance and other dimensional attributes are determined and used as evaluation indexes, and a weight value is distributed to each evaluation index.
In one embodiment, the evaluation indicators and the assigned weight values for each load are determined as shown in table 1 below.
TABLE 1
Serial number Load evaluation index (i) Weight (Ri)
1 Loss of interruption 0.6
2 Electric department 0.2
3 Sensitivity of the probe 0.1
4 Electrical distance 0.1
Step S2, obtaining scores of each evaluation index of the load controlled by each load control terminal, giving a corresponding weight value according to each evaluation index and the obtained scores of each evaluation index of the load controlled by each load control terminal, calculating a comprehensive score of the load controlled by each load control terminal, and further obtaining a priority cutting sequence of the load controlled by each load control terminal according to the calculated comprehensive score of the load controlled by each load control terminal;
the specific process is that firstly, the score of each evaluation index of the load controlled by each load control terminal is obtained, and the score can be automatically calculated by a system or scored by an expert and then stored in a computer; secondly, multiplying each evaluation index score of the load by the weight of the evaluation index score to obtain a weighted comprehensive score of each load; and finally, sequencing the same load control terminal according to the scores of the loads, thereby determining the level fixed value of the load connected with each terminal, namely the priority cutting sequence of the load controlled by each load control terminal is obtained by arranging the comprehensive scores of the loads controlled in the same load control terminal from large to small.
In one embodiment, the composite score of the load controlled by the load control terminal is shown in table 2 below.
TABLE 2
Load evaluation index Load 1 Load 2 Load n
Loss of interruption X11 X12 X1n
Electric department X21 X22 X2n
Sensitivity of the probe X31 X32 X3n
Electrical distance X41 X42 X4n
Composite score X1 X2 Xn
Wherein, the weighted comprehensive score calculation formula is shown as formula (1):
in the formula, XnThe composite score of the nth load; riThe weighted value of the ith evaluation index; xinThe score of the ith index for the nth load.
Step S3, collecting the load-cutting quantity of each load control terminal in each stability control substation to obtain the theoretical total load-cutting quantity of each stability control substation, and obtaining the preferential cutting sequence of each load control terminal in the same stability control substation according to the calculated comprehensive score of the load controlled by each load control terminal;
the method comprises the specific process that the switchable load capacity of each load control terminal in each stable control substation is collected to obtain the theoretical total switchable load capacity of each stable control substation and is used as the basis of subsequent distribution, and the priority cutting sequence of each load control terminal in the same stable control substation is set at the same time, namely, the comprehensive scores of the loads controlled by each load control terminal in the same stable control substation are added to obtain an average value and then are arranged from large to small.
Wherein, the average value calculation formula of each negative control terminal is shown as formula (2):
in the formula, YmAnd the average value of all the load comprehensive scores of the mth load control terminal.
And S4, acquiring the total amount of the controllable loads of the stable control master station when the main network connection line or the extra-high voltage direct current fails, distributing the total amount of the controllable loads of the stable control master station to the corresponding stable control substations according to a preset cutting weight value of each stable control substation and the acquired theoretical total amount of the controllable loads of each stable control substation, acquiring the actual amount of the controllable loads of each stable control substation and the actual controllable loads of the load terminals correspondingly connected with the stable control substation, and further cutting the loads controlled by the load terminals of which the actual controllable loads are not 0 in each stable control substation of which the actual controllable loads are not 0 in sequence according to the acquired preferential cutting sequence of the load terminals in the same stable control substation and the preferential cutting sequence of the controlled loads of each load terminal.
The method comprises the specific processes that firstly, the total amount of the switchable loads of a stable control main station during a main network connection line or an extra-high voltage direct current fault is obtained, and the distribution sequence of the total amount of the switchable loads of the stable control main station is determined according to the preset switching off weight value of each stable control substation (namely, the priority of the substation is determined); if the cutting weight values of the stability control substations are arranged from large to small;
secondly, determining the first k +1 stable control substations for allocating the total amount of the switchable loads of the stable control main station in the allocation sequence; the sum of the theoretical total amount of the cutable loads of the first k stabilized control substations in the distribution sequence is less than the total amount of the cutable loads of the stabilized control main station; the sum of the theoretical total amount of the cutable loads of the first k +1 stabilized control substations in the distribution sequence is more than or equal to the total amount of the cutable loads of the stabilized control main station; k is a positive integer; it can be understood that the total amount of the switchable loads of the stable control master station is (sum of the theoretical total amounts of the switchable loads of 1-k stable control substations, sum of the theoretical total amounts of the switchable loads of 1-k +1 stable control substations ];
setting the theoretical total amount of the switchable loads of the first k stabilized control substations in the distribution sequence correspondingly as the actual total amount of the switchable loads of the first k stabilized control substations, setting the difference value of the sum of the total amount of the switchable loads of the stabilized control master station and the theoretical total amount of the switchable loads of the first k stabilized control substations in the distribution sequence as the actual total amount of the switchable loads of the kth +1 stabilized control substation in the distribution sequence, and setting 0 as the actual total amount of the switchable loads of the stabilized control substations after the kth +1 stabilized control substation in the distribution sequence; it can be understood that the value obtained by subtracting the sum of the theoretical total amount of the cutable loads of the 1-k stabilized control substations from the total amount of the cutable loads of the stabilized control master station is given to the (k + 1) th stabilized control substation in the distribution sequence as the actual total amount of the cutable loads, and the actual total amounts of the cutable loads of the subsequent (k + 2) th stabilized control substations, the (k + 3) th stabilized control substation, the (… …) and the like in the distribution sequence are all 0;
thirdly, sequentially and progressively forming an initial load shedding set by the loads controlled by the negative control terminals in all the stable control substations layer by layer according to the distribution sequence, the obtained priority shedding sequence of the negative control terminals in all the stable control substations and the priority shedding sequence of the loads controlled by each negative control terminal; for example, in one embodiment, the allocation order corresponds to the stability control substations a1, a2, …, a 5; the stability control substation A1 corresponds to load control terminals B11 and B12; the stability control substation A2 corresponds to load control terminals B21, B22 and B23; the stability control substation A3 corresponds to a load control terminal B31; the stability control substation A4 corresponds to load control terminals B41, B42, B43 and B44; the stability control substation A5 corresponds to load control terminals B51 and B52; the resulting initial load shedding set is { B11, B12; b21, B22, B23; b31; b41, B42, B43, B44; b51, B52 };
then, obtaining a preferential cutting sequence of each negative control terminal in the (k + 1) th stable control substation in the distribution sequence, determining the first m +1 negative control terminals used for the (k + 1) th stable control substation for distributing the practical total amount of the switchable load in the preferential cutting sequence of each negative control terminal in the (k + 1) th stable control substation, and further determining the first n +1 loads to be cut in the (m + 1) th negative control terminal according to the preferential cutting sequence of the loads controlled by the (m + 1) th negative control terminal; the sum of the addition of the switchable load quantities of the first m load control terminals in the preferential switching-off sequence of the (k + 1) th stabilized control substation is less than the actual switchable load quantity of the (k + 1) th stabilized control substation; the sum of the addition of the switchable load quantities of the first m +1 load control terminals in the preferential switching-off sequence of the (k + 1) th stable control substation is greater than or equal to the actual switchable load quantity of the (k + 1) th stable control substation; the sum of the load quantities of the first n loads in the priority cutting sequence of the load controlled by the (m + 1) th load control terminal in the (k + 1) th stable control substation is less than the total load quantity distributed by the (m + 1) th load control terminal in the (k + 1) th stable control substation; the sum of the load quantities of the first n +1 loads in the priority cutting sequence of the loads controlled by the (m + 1) th load control terminal in the (k + 1) th stable control substation is more than or equal to the total load quantity distributed by the (m + 1) th load control terminal in the (k + 1) th stable control substation; m and n are positive integers; it should be noted that, for the determination of the first n +1 loads to be cut out in the (m + 1) th load control terminal, the principle is the same as that of the (k + 1) th stable control substation, and the layer-by-layer propulsion mode is adopted to distribute the actual total amount of the cut-out loads of the (k + 1) th stable control substation to specific loads;
then, in the initial load shedding set, deleting the loads controlled by all the load control terminals in all the stabilized control substations of which the actual total amount of the load to be cut is 0, further deleting the loads controlled by the load control terminals after the (m + 1) th load control terminal corresponding to the preferential shedding sequence of all the load control terminals in the (k + 1) th stabilized control substation and deleting the loads after the (n + 1) th load control terminal corresponding to the preferential shedding sequence of the (m + 1) th load control terminal in the (k + 1) th stabilized control substation, and updating to obtain a final load shedding set, namely deleting all the loads which are not distributed to the load to be cut in the initial load shedding set, so that the selected load amount is accurately matched with the load amount required to be cut by the system;
and finally, sequentially cutting the loads in the obtained final load cutting set according to the obtained final load cutting set, namely executing the tripping operation of the corresponding load switch.
As shown in fig. 3, a multi-dimensional load attribute-based precise load control system provided in the embodiment of the present invention is used in a three-level tree network (as shown in fig. 2) formed by a stable control master station, a plurality of stable control substations, and a plurality of negative control terminals; each steady accuse sub-station all connects the steady accuse master station, and each steady accuse sub-station still corresponds respectively and is connected with a plurality of burden accuse terminals, includes:
the assignment unit 10 is configured to determine a common dimension attribute of a load controlled by each negative control terminal, use the obtained common dimension attribute as an evaluation index, and further assign a corresponding weight value to each evaluation index;
a load priority removal order obtaining unit 20, configured to obtain scores of each evaluation index of the load controlled by each negative control terminal, and assign a corresponding weight value to each evaluation index and the obtained score of each evaluation index of the load controlled by each negative control terminal, to calculate a comprehensive score of the load controlled by each negative control terminal, and further obtain a priority removal order of the load controlled by each negative control terminal according to the calculated comprehensive score of the load controlled by each negative control terminal;
a load control terminal preferential excision sequence acquisition unit 30, configured to collect the amount of the load that can be cut by each load control terminal in each stability control substation, to obtain a theoretical total amount of the load that can be cut by each stability control substation, and to obtain a preferential excision sequence of each load control terminal in the same stability control substation according to the calculated comprehensive score of the load controlled by each load control terminal;
and the load accurate removal unit 40 is configured to obtain the total amount of the switchable loads of the stable control master station when the main network interconnection line or the extra-high voltage direct current fails, allocate all the total amount of the switchable loads of the stable control master station to the corresponding stable control slave stations according to a preset removal weight value of each stable control slave station and the obtained theoretical total amount of the switchable loads of each stable control slave station, obtain the actual total amount of the switchable loads of each stable control slave station and the actual switchable loads of the load control terminals connected to the stable control slave stations correspondingly, and sequentially remove the loads controlled by the load control terminals of which the actual switchable loads are not 0 in each stable control slave station of which the actual amounts of the switchable loads are not 0 according to the obtained preferential removal sequence of the load control terminals in the same stable control slave station and the preferential removal sequence of the loads controlled by the load control terminals.
Wherein the common dimensional attributes include outage loss, affiliated power usage, sensitivity, and electrical distance.
The priority cutting sequence of the load controlled by each load control terminal is obtained by arranging the comprehensive scores of the loads controlled by the same load control terminal from large to small.
The priority cutting sequence of each negative control terminal in the same stable control substation is obtained by adding and averaging the comprehensive scores of the loads controlled by each negative control terminal in the same stable control substation and then arranging the average values from large to small.
Wherein the load accurate cutting unit 40 includes:
a main station load distribution sequence acquisition module 401, configured to acquire the total amount of the switchable loads of the stable control main station when a main network interconnection line or an extra-high voltage direct current fault occurs, and determine a distribution sequence of the total amount of the switchable loads of the stable control main station according to the preset cutoff weight value of each stable control substation;
a substation screening module 402, configured to determine, in the allocation sequence, the first k +1 stable control substations used for allocating the total amount of the switchable loads of the stable control master station; the sum of the theoretical total amount of the cutable loads of the first k stabilized control substations in the distribution sequence is less than the total amount of the cutable loads of the stabilized control main station; the sum of the addition of the theoretical total amount of the load-cuttable of the first k +1 stabilized control substations in the distribution sequence is more than or equal to the total amount of the load-cuttable of the stabilized control main station; k is a positive integer;
a substation load obtaining module 403, configured to correspondingly set the total switchable load theoretical amounts of the first k stabilized control substations in the distribution sequence as respective actual switchable load amounts, set a difference value between a sum of the total switchable load amount of the stabilized control master station and the theoretical switchable load amounts of the first k stabilized control substations in the distribution sequence as an actual switchable load amount of the kth +1 stabilized control substation in the distribution sequence, and set 0 as an actual switchable load amount of the kth +1 stabilized control substation in the distribution sequence;
a load shedding set initial module 404, configured to sequentially and layer by layer progressively form an initial load shedding set for the loads controlled by the negative control terminals in all the stable control substations according to the distribution sequence, the obtained priority shedding sequence of the negative control terminals in the stable control substations, and the priority shedding sequence of the load controlled by each negative control terminal;
a load precision determination module 405, configured to obtain a priority removal sequence of each load control terminal in the (k + 1) th stable control substation in the distribution sequence, determine the first m +1 load control terminals used for all distribution of the actual total amount of the load that can be switched of the (k + 1) th stable control substation in the priority removal sequence of each load control terminal in the (k + 1) th stable control substation, and further determine the first n +1 loads to be removed in the (m + 1) th load control terminal according to the priority removal sequence of the load controlled by the (m + 1) th load control terminal; the sum of the addition of the switchable load quantities of the first m load control terminals in the preferential switching-off sequence of the (k + 1) th stabilized control substation is less than the actual switchable load quantity of the (k + 1) th stabilized control substation; the sum of the addition of the switchable load quantities of the first m +1 load control terminals in the preferential switching-off sequence of the (k + 1) th stable control substation is more than or equal to the actual switchable load quantity of the (k + 1) th stable control substation; the sum of the load quantities of the first n loads in the priority cutting sequence of the load controlled by the (m + 1) th load control terminal in the (k + 1) th stable control substation is less than the total load quantity distributed by the (m + 1) th load control terminal in the (k + 1) th stable control substation; the sum of the load quantities of the first n +1 loads in the priority cutting sequence of the loads controlled by the (m + 1) th load control terminal in the (k + 1) th stable control substation is more than or equal to the total load quantity distributed by the (m + 1) th load control terminal in the (k + 1) th stable control substation; m and n are positive integers;
a load shedding set final module 406, configured to delete, in the initial load shedding set, loads controlled by all negative control terminals in the stability control substation of which the actual total amount of the switchable loads is 0, further delete loads controlled by the m +1 th negative control terminal after the preferential shedding order of each negative control terminal in the (k + 1) th stability control substation corresponds to, delete loads after the n +1 th negative control terminal corresponding to the preferential shedding order of the m +1 th negative control terminal in the (k + 1) th stability control substation, and update to obtain a final load shedding set;
and a load precise removal module 407, configured to sequentially remove loads in the obtained final load removal set according to the obtained final load removal set.
The embodiment of the invention has the following beneficial effects:
the invention carries out hierarchical cutting on large-scale interruptible loads in the power grid according to the important grade priority principle, when the last layer of loads meeting the total required cutting amount are cut, the interruptible loads on a shunt switch of a user are sequentially selected and cut according to the priority order of the load control terminal until the total cutting amount is met, the maximum error is the interruptible load amount, the problem that the granularity of a basic cutting load unit is too large and a large amount of excessive cutting is easily caused in the prior art can be solved, the cutting load precision is improved, the hierarchical accurate load control is realized, and the guarantee is provided for the safe operation of the power grid.
It should be noted that, in the above system embodiment, each included unit is only divided according to functional logic, but is not limited to the above division as long as the corresponding function can be implemented; in addition, specific names of the functional units are only for convenience of distinguishing from each other, and are not used for limiting the protection scope of the present invention.
It will be understood by those skilled in the art that all or part of the steps in the method for implementing the above embodiments may be implemented by relevant hardware instructed by a program, and the program may be stored in a computer-readable storage medium, such as ROM/RAM, magnetic disk, optical disk, etc.
The above disclosure is only for the purpose of illustrating the preferred embodiments of the present invention, and it is therefore to be understood that the invention is not limited by the scope of the appended claims.

Claims (10)

1. A precise load control method based on multi-dimensional load attributes is used on a three-level tree network formed by a stable control main station, a plurality of stable control substations and a plurality of load control terminals; each stable control substation is connected with the stable control main station and is also correspondingly connected with a plurality of load control terminals; characterized in that the method comprises the following steps:
determining a common dimension attribute of a load controlled by each load control terminal, taking the obtained common dimension attribute as an evaluation index, and further endowing each evaluation index with a corresponding weight value;
obtaining scores of all evaluation indexes of the load controlled by each load control terminal, giving a corresponding weight value according to each evaluation index and the obtained scores of all evaluation indexes of the load controlled by each load control terminal, calculating the comprehensive score of the load controlled by each load control terminal, and further obtaining a priority cutting sequence of the load controlled by each load control terminal according to the calculated comprehensive score of the load controlled by each load control terminal;
summarizing the switchable load quantity of each load control terminal in each stable control substation to obtain the theoretical total switchable load quantity of each stable control substation, and obtaining the preferential switching-off sequence of each load control terminal in the same stable control substation according to the calculated comprehensive score of the controlled load of each load control terminal;
the method comprises the steps of obtaining the total amount of the switchable load of the stable control main station when a main network connection line or an extra-high voltage direct current fault occurs, distributing the total amount of the switchable load of the stable control main station to the corresponding stable control substations according to a preset switching weight value of each stable control substation and the obtained theoretical total amount of the switchable load of each stable control substation, obtaining the actual amount of the switchable load of each stable control substation and the actual switchable load of each load control terminal correspondingly connected with the actual amount of the switchable load of each stable control substation, and further sequentially switching off the loads controlled by the load control terminals of which the actual switchable load total amount is not 0 in each stable control substation according to the obtained preferential switching-off sequence of the load control terminals in the same stable control substation and the preferential switching-off sequence of the loads controlled by each load control terminal.
2. The method of claim 1, wherein the common dimensional attributes include outage loss, associated power usage, sensitivity, and electrical distance.
3. The method for controlling the precision load based on the multidimensional load attribute as claimed in claim 1, wherein the priority cutting order of the loads controlled by each load control terminal is obtained by arranging the composite scores of the loads controlled by the same load control terminal from large to small.
4. The method for controlling the precision load based on the multidimensional load attribute of claim 1, wherein the priority cut-off sequence of the negative control terminals in the same stable control substation is obtained by adding and averaging the comprehensive scores of the loads controlled by the negative control terminals in the same stable control substation and then arranging the average values from large to small.
5. The method for fine load control based on multi-dimensional load attributes as claimed in claim 1, the total amount of the switchable load of the stability control main station is obtained when the main network connection line or the extra-high voltage direct current fault occurs, and according to the preset cutting weight value of each stable control substation and the obtained theoretical total amount of the cutting load of each stable control substation, the total amount of the cutting load of the stable control main station is completely distributed to the corresponding stable control substation to obtain the actual total amount of the cutting load of each stable control substation and the actual cutting load of each load control terminal correspondingly connected with the stable control substation, and further according to the obtained priority cutting-off sequence of each load control terminal in the same stable control substation and the priority cutting-off sequence of the load controlled by each load control terminal, the specific steps of sequentially cutting off the loads controlled by each load control terminal with the actual switchable load amount not 0 in each stable control substation with the actual switchable load amount not 0 comprise:
acquiring the total amount of the switchable loads of the stable control main station when a main network connection line or an extra-high voltage direct current fault occurs, and determining the distribution sequence of the total amount of the switchable loads of the stable control main station according to the preset cutting weight value of each stable control substation;
in the distribution sequence, determining the first k +1 stable control substations which are used for distributing the total amount of the switchable loads of the stable control main station; the sum of the theoretical total amount of the cutable loads of the first k stabilized control substations in the distribution sequence is less than the total amount of the cutable loads of the stabilized control main station; the sum of the addition of the theoretical total amount of the load-cuttable of the first k +1 stabilized control substations in the distribution sequence is more than or equal to the total amount of the load-cuttable of the stabilized control main station; k is a positive integer;
correspondingly setting the theoretical total amount of the switchable loads of the first k stabilized control substations in the distribution sequence as the actual total amount of the switchable loads of the respective stabilized control substations, setting the difference value of the sum of the total amount of the switchable loads of the stabilized control master station and the theoretical total amount of the switchable loads of the first k stabilized control substations in the distribution sequence as the actual total amount of the switchable loads of the kth +1 stabilized control substation in the distribution sequence, and setting 0 as the actual total amount of the switchable loads of the stabilized control substations after the kth +1 stabilized control substation in the distribution sequence;
sequentially and progressively forming an initial load shedding set by the loads controlled by the load control terminals in all the stable control substations layer by layer according to the distribution sequence, the obtained priority shedding sequence of the load control terminals in the stable control substations and the priority shedding sequence of the loads controlled by each load control terminal;
obtaining a preferential cutting sequence of each load control terminal in the (k + 1) th stabilized control substation in the distribution sequence, determining the first m +1 load control terminals used for the total practical total amount of the switchable loads of the (k + 1) th stabilized control substation in the preferential cutting sequence of each load control terminal in the (k + 1) th stabilized control substation, and further determining the first n +1 loads to be cut in the (m + 1) th load control terminal according to the preferential cutting sequence of the loads controlled by the (m + 1) th load control terminal; the sum of the addition of the switchable load quantities of the first m load control terminals in the preferential switching-off sequence of the (k + 1) th stabilized control substation is less than the actual switchable load quantity of the (k + 1) th stabilized control substation; the sum of the addition of the switchable load quantities of the first m +1 load control terminals in the preferential switching-off sequence of the (k + 1) th stable control substation is more than or equal to the actual switchable load quantity of the (k + 1) th stable control substation; the sum of the load quantities of the first n loads in the priority cutting sequence of the load controlled by the (m + 1) th load control terminal in the (k + 1) th stable control substation is less than the total load quantity distributed by the (m + 1) th load control terminal in the (k + 1) th stable control substation; the sum of the load quantities of the first n +1 loads in the priority cutting sequence of the loads controlled by the (m + 1) th load control terminal in the (k + 1) th stable control substation is more than or equal to the total load quantity distributed by the (m + 1) th load control terminal in the (k + 1) th stable control substation; m and n are positive integers;
in the initial load shedding set, deleting the loads controlled by all the load control terminals in the stabilized control substations of which the actual total amount of the loads capable of being shed is 0, further deleting the loads controlled by the load control terminals after the (m + 1) th load control terminal corresponding to the preferential shedding sequence of all the load control terminals in the (k + 1) th stabilized control substation and deleting the loads after the (n + 1) th load control terminal corresponding to the preferential shedding sequence of the (m + 1) th load control terminal in the (k + 1) th stabilized control substation, and updating to obtain a final load shedding set;
and sequentially cutting off the loads in the obtained final load cutting set according to the obtained final load cutting set.
6. A precise load control system based on multi-dimensional load attributes is used for a three-level tree network formed by a stable control main station, a plurality of stable control substations and a plurality of load control terminals; each steady accuse sub-station all connects the steady accuse master station, just each steady accuse sub-station still corresponds respectively and is connected with a plurality of burden accuse terminals, its characterized in that includes:
the assignment unit is used for determining a common dimension attribute of the load controlled by each load control terminal, taking the obtained common dimension attribute as an evaluation index, and further endowing each evaluation index with a corresponding weight value;
a load priority removal sequence acquisition unit, configured to acquire scores of evaluation indexes of the load controlled by each negative control terminal, and to assign a corresponding weight value to each evaluation index and the acquired score of each evaluation index of the load controlled by each negative control terminal, to calculate a comprehensive score of the load controlled by each negative control terminal, and further to obtain a priority removal sequence of the load controlled by each negative control terminal according to the calculated comprehensive score of the load controlled by each negative control terminal;
the load control terminal priority cutting sequence acquisition unit is used for summarizing the switchable load capacity of each load control terminal in each stable control substation to obtain the switchable load theoretical total amount of each stable control substation, and obtaining the priority cutting sequence of each load control terminal in the same stable control substation according to the calculated comprehensive score of the controlled load of each load control terminal;
and the load accurate cutting unit is used for acquiring the total amount of the switchable loads of the stable control main station when the main network connection line or the extra-high voltage direct current fails, distributing all the total amount of the switchable loads of the stable control main station to the corresponding stable control substations according to a preset cutting weight value of each stable control substation and the obtained theoretical total amount of the switchable loads of each stable control substation, obtaining the actual amount of the switchable loads of each stable control substation and the actual switchable loads of the load terminals correspondingly connected with the stable control substation, and further cutting the loads of the load terminals of which the actual switchable loads are not 0 in each stable control substation of which the actual amounts of the switchable loads are not 0 in sequence according to the obtained preferential cutting sequence of the load terminals in the same stable control substation and the preferential cutting sequence of the loads controlled by each load terminal.
7. The multi-dimensional load attribute-based precision load control system of claim 6, wherein the common dimensional attributes include outage loss, belonging electricity sector, sensitivity, and electrical distance.
8. The system of claim 6, wherein the order of preferential removal of the controlled loads of each load control terminal is obtained by arranging the composite scores of the controlled loads in the same load control terminal from large to small.
9. The system for precision load control based on multidimensional load attributes according to claim 6, wherein the priority cut-off sequence of the negative control terminals in the same stable control substation is obtained by adding and averaging the comprehensive scores of the loads controlled by the negative control terminals in the same stable control substation and then arranging the average values from large to small.
10. The multi-dimensional load attribute-based precision load control system according to claim 6, wherein the load accurate shedding unit comprises:
the main station load distribution sequence acquisition module is used for acquiring the total amount of the switchable loads of the stable control main station when a main network connection line or an extra-high voltage direct current fault occurs, and determining the distribution sequence of the total amount of the switchable loads of the stable control main station according to the preset cutting weight value of each stable control substation;
the substation screening module is used for determining the first k +1 stable control substations for allocating the total amount of the switchable loads of the stable control main station in the allocation sequence; the sum of the theoretical total amount of the cutable loads of the first k stabilized control substations in the distribution sequence is less than the total amount of the cutable loads of the stabilized control main station; the sum of the addition of the theoretical total amount of the load-cuttable of the first k +1 stabilized control substations in the distribution sequence is more than or equal to the total amount of the load-cuttable of the stabilized control main station; k is a positive integer;
the substation load acquisition module is used for correspondingly setting the switchable load theoretical total amount of the first k stabilized control substations in the distribution sequence as respective switchable load actual total amount, setting the difference value of the sum of the switchable load total amount of the stabilized control master station and the switchable load theoretical total amount of the first k stabilized control substations in the distribution sequence as the switchable load actual total amount of the kth +1 stabilized control substation in the distribution sequence, and setting 0 as the switchable load actual total amount of the stabilized control substations after the kth +1 stabilized control substation in the distribution sequence;
the load shedding set initial module is used for sequentially progressing loads controlled by the load control terminals in all the stable control substations layer by layer to form an initial load shedding set according to the distribution sequence, the obtained priority shedding sequence of the load control terminals in all the stable control substations and the priority shedding sequence of the load controlled by each load control terminal;
the load precision determination module is used for acquiring a priority cutting sequence of each load control terminal in a (k + 1) th stable control substation in the distribution sequence, determining the first m +1 load control terminals used for distributing the practical total amount of the load to be cut of the (k + 1) th stable control substation in the priority cutting sequence of each load control terminal in the (k + 1) th stable control substation, and further determining the first n +1 loads to be cut in the (m + 1) th load control terminal according to the priority cutting sequence of the load controlled by the (m + 1) th load control terminal; the sum of the addition of the switchable load quantities of the first m load control terminals in the preferential switching-off sequence of the (k + 1) th stabilized control substation is less than the actual switchable load quantity of the (k + 1) th stabilized control substation; the sum of the addition of the switchable load quantities of the first m +1 load control terminals in the preferential switching-off sequence of the (k + 1) th stable control substation is more than or equal to the actual switchable load quantity of the (k + 1) th stable control substation; the sum of the load quantities of the first n loads in the priority cutting sequence of the load controlled by the (m + 1) th load control terminal in the (k + 1) th stable control substation is less than the total load quantity distributed by the (m + 1) th load control terminal in the (k + 1) th stable control substation; the sum of the load quantities of the first n +1 loads in the priority cutting sequence of the loads controlled by the (m + 1) th load control terminal in the (k + 1) th stable control substation is more than or equal to the total load quantity distributed by the (m + 1) th load control terminal in the (k + 1) th stable control substation; m and n are positive integers;
a load shedding set final module, configured to delete, in the initial load shedding set, loads controlled by all negative control terminals in the stabilized control substations of which the actual total amount of the cutable loads is 0, further delete loads controlled by the m +1 th negative control terminal after the preferential shedding order of each negative control terminal in the (k + 1) th stabilized control substation corresponds to, delete loads after the n +1 th load after the preferential shedding order of the m +1 th negative control terminal in the (k + 1) th stabilized control substation corresponds to, and update to obtain a final load shedding set;
and the load precise removal module is used for sequentially removing the loads in the obtained final load removal set according to the obtained final load removal set.
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CN113657032A (en) * 2021-08-12 2021-11-16 国网安徽省电力有限公司 Low-frequency load shedding method and system for pre-centralized coordination and real-time distributed control
CN113657032B (en) * 2021-08-12 2023-11-24 国网安徽省电力有限公司 Low-frequency load shedding method and system for pre-centralized coordination real-time distribution control

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