CN115395504A - Power grid-based low-frequency load shedding control method, device, system and medium - Google Patents

Power grid-based low-frequency load shedding control method, device, system and medium Download PDF

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Publication number
CN115395504A
CN115395504A CN202210932857.1A CN202210932857A CN115395504A CN 115395504 A CN115395504 A CN 115395504A CN 202210932857 A CN202210932857 A CN 202210932857A CN 115395504 A CN115395504 A CN 115395504A
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frequency
branch
power grid
load
low
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赵炜
杨晓东
张伟
高岩
胡文丽
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State Grid Corp of China SGCC
Baoding Power Supply Co of State Grid Hebei Electric Power Co Ltd
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State Grid Corp of China SGCC
Baoding Power Supply Co of State Grid Hebei Electric Power 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
    • 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
    • H02J3/144—Demand-response operation of the power transmission or distribution network
    • 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
    • H02J2203/00—Indexing scheme relating to details of circuit arrangements for AC mains or AC distribution networks
    • H02J2203/10—Power transmission or distribution systems management focussing at grid-level, e.g. load flow analysis, node profile computation, meshed network optimisation, active network management or spinning reserve management
    • 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
    • H02J2203/00—Indexing scheme relating to details of circuit arrangements for AC mains or AC distribution networks
    • H02J2203/20—Simulating, e g planning, reliability check, modelling or computer assisted design [CAD]
    • 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
    • H02J2310/00—The network for supplying or distributing electric power characterised by its spatial reach or by the load
    • H02J2310/50—The network for supplying or distributing electric power characterised by its spatial reach or by the load for selectively controlling the operation of the loads
    • H02J2310/56—The network for supplying or distributing electric power characterised by its spatial reach or by the load for selectively controlling the operation of the loads characterised by the condition upon which the selective controlling is based
    • H02J2310/58—The condition being electrical
    • H02J2310/60—Limiting power consumption in the network or in one section of the network, e.g. load shedding or 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
    • 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
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E10/00—Energy generation through renewable energy sources
    • Y02E10/50—Photovoltaic [PV] energy
    • Y02E10/56—Power conversion systems, e.g. maximum power point trackers
    • 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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  • Power Engineering (AREA)
  • Supply And Distribution Of Alternating Current (AREA)

Abstract

The application provides a low-frequency load shedding control method, device, system and medium based on a power grid, which comprises the following steps: when the frequency of the power grid is reduced to a preset frequency threshold value, obtaining operation data of the power grid when the low-frequency load shedding controls each branch, determining a cutting sequence according to the operation data and a preset low-frequency load shedding control model, and generating a tripping command according to the cutting sequence to cut off the corresponding branch of the power grid. The corresponding cutting sequence is determined through the operation data and a preset di Lin Jianzai control model, and the real-time load of the power grid is adjusted through the cutting sequence, so that a low-frequency load shedding mechanism can be changed along with the condition of the power grid, and the safety of the power grid is improved.

Description

Power grid-based low-frequency load shedding control method, device, system and medium
Technical Field
The application relates to the technical field of control, in particular to a low-frequency load shedding control method, device, system and medium based on a power grid.
Background
With the fact that a large amount of distributed new energy is connected into a power distribution network, the traditional power distribution network is changed from a passive network to an active network. The new energy is used as a factor influencing the load level of the whole network and indirectly acts on the low-frequency load shedding control capability. Taking distributed photovoltaic as an example, during daytime power generation, a reverse load is superimposed on a grid-connected 35kV and 10kV branch circuit, so that the actual load of the low-frequency load-shedding control branch circuit is reduced, and even the active power is transmitted to the grid side.
Disclosure of Invention
The present application is proposed to solve the above-mentioned technical problems. The embodiment of the application provides a low-frequency load shedding control method, device, system and medium based on a power grid, and solves the problem of reduction of actual load of a low-frequency load shedding control branch.
According to one aspect of the application, a control method for low-frequency load shedding based on a power grid is provided, and comprises the following steps:
when the frequency of the power grid is reduced to a preset frequency threshold value, acquiring operation data of the power grid when low-frequency load shedding controls each branch circuit;
determining a cutting sequence according to the operation data and a preset low-frequency load shedding control model; and
and generating a tripping instruction according to the cutting sequence so as to cut off the corresponding branch of the power grid.
In an embodiment, the obtaining of the operation data when the low-frequency load shedding of the power grid controls each branch includes:
acquiring operation data of each branch circuit of the low-frequency load shedding control of the power grid; wherein the operational data includes current, load, and load, voltage, and frequency of the power grid.
In an embodiment, the constructing of the preset low frequency load shedding control model includes:
acquiring operation data of a plurality of branches;
matching each of the branches with a branch pool of a different frequency according to a load property of the operating data;
forming a fixed cutting sequence for the matched multiple shunting pools according to a regional equilibrium distribution principle; and
and constructing the preset low-frequency load shedding control model according to the plurality of cutting sequences and the plurality of operation data.
In an embodiment, the forming the plurality of branch pools into the fixed excision sequence according to the principle of regional equilibrium distribution includes:
and calculating to obtain the cutting sequence according to the plurality of operation data and the proportion of the grid load cut by the target turns.
In an embodiment, said matching said each tap to a pool of taps of different frequencies according to a load property of said operational data comprises:
matching each branch with a branch pool of different frequencies according to the user property of each branch and the load property of the running data.
In an embodiment, the matching each of the branches with a pool of branches of different frequencies according to a user property of the each branch and a load property of the operation data includes:
matching each branch with a different frequency of branch pool according to the user property of each branch, the load property of the running data and the power supply area of each branch.
In one embodiment, matching the each tap with a pool of taps of different frequencies according to a load property of the operational data comprises:
matching each of the branches with a branch pool of a different frequency according to a load property of the operating data; the ratio of the total load of the branches in the branch pool on a target day to the total network supply load is not lower than the target control ratio of the corresponding frequency of the branch pool.
According to another aspect of the present application, there is provided a monitoring device for a distribution network area, including:
the acquisition module is used for acquiring operation data of each branch circuit of the low-frequency load shedding control of the power grid when the frequency of the power grid is reduced to a preset frequency threshold;
the determining module is used for determining a cutting sequence according to the operation data and a preset low-frequency load shedding control model; and
and the generating module is used for generating a tripping instruction according to the cutting sequence so as to cut off the corresponding branch.
According to another aspect of the present application, there is provided a system for detecting distribution network areas, comprising:
the detection device for the distribution network area is described above; and
and the master station server is in communication connection with the detection device and is used for controlling the detection device to work.
According to another aspect of the present application, there is provided a computer-readable storage medium storing a computer program for executing the grid-based underfrequency offloading control method described in any of the above.
The application provides a low-frequency load shedding control method, device, system and medium based on a power grid, which comprises the following steps: when the frequency of the power grid is reduced to a preset frequency threshold value, obtaining operation data of the power grid when the low-frequency load shedding controls each branch, determining a cutting sequence according to the operation data and a preset low-frequency load shedding control model, and generating a tripping command according to the cutting sequence to cut off the corresponding branch of the power grid. The corresponding cutting sequence is determined through the operation data and a preset di Lin Jianzai control model, and the real-time load of the power grid is adjusted through the cutting sequence, so that a low-frequency load shedding mechanism can be changed along with the condition of the power grid, and the safety of the power grid is improved.
Drawings
The above and other objects, features and advantages of the present application will become more apparent by describing in more detail embodiments of the present application with reference to the attached drawings. The accompanying drawings are included to provide a further understanding of the embodiments of the application and are incorporated in and constitute a part of this specification, illustrate embodiments of the application and together with the description serve to explain the principles of the application. In the drawings, like reference numbers generally represent like parts or steps.
Fig. 1 is a schematic flow chart of a control method for grid-based low-frequency load shedding according to an exemplary embodiment of the present application.
Fig. 2 is a schematic flow chart of a control method for grid-based low-frequency load shedding according to another exemplary embodiment of the present application.
Fig. 3 is a flowchart illustrating a method for constructing a preset low-frequency deloading control model according to an exemplary embodiment of the present application.
Fig. 4 is a flowchart illustrating a method for constructing a preset low-frequency deloading control model according to an exemplary embodiment of the present application.
Fig. 5 is a flowchart illustrating a method for constructing a preset low-frequency deloading control model according to an exemplary embodiment of the present application.
Fig. 6 is a schematic structural diagram of a monitoring device for a distribution network area according to an exemplary embodiment of the present application.
Fig. 7 is a schematic structural diagram of a monitoring device for a distribution network area according to another exemplary embodiment of the present application.
Fig. 8 is a block diagram of an electronic device provided in an exemplary embodiment of the present application.
Detailed Description
Hereinafter, example embodiments according to the present application will be described in detail with reference to the accompanying drawings. It should be understood that the described embodiments are only some embodiments of the present application and not all embodiments of the present application, and that the present application is not limited by the example embodiments described herein.
Fig. 1 is a schematic flow chart of a control method for grid-based low-frequency load shedding according to an exemplary embodiment of the present application. As shown in fig. 1, the control method of grid-based low-frequency load shedding includes:
step 110: and when the frequency of the power grid is reduced to a preset frequency threshold value, acquiring the operation data of the power grid when the low-frequency load shedding control is performed on each branch.
In the embodiment of the invention, real-time data of the current, load and power grid load, voltage and frequency of all 35kV and 10kV branches of the low-frequency load shedding control can be called from the low-frequency load shedding control. When the power grid encounters systematic faults and the frequency is reduced to a preset frequency threshold value, a low-frequency deloading scheme is adopted to cut off shunts to ensure safe dispatching of the power grid
Step 120: and determining a cutting sequence according to the operation data and a preset low-frequency load shedding control model.
In the embodiment of the present invention, the construction of the preset low-frequency load shedding control model includes:
(11) Obtaining operation data of a plurality of branches.
(12) Each tap is matched to a pool of taps of different frequency according to the load nature of the operating data.
(13) And forming a fixed excision sequence by the plurality of shunt pools according to a regional equilibrium distribution principle.
(14) And constructing a preset low-frequency load shedding control model according to the plurality of cutting sequences and the plurality of operation data.
The method comprises the steps of obtaining operation data of a plurality of branches of a power grid, matching each branch with branch pools with different frequencies according to load properties, and forming a fixed cutting sequence by the matched branch pools according to a regional balance distribution principle. And by the formula:
Figure BDA0003782368190000041
j represents the action constant value when the current power grid frequency reaches the j round, and j is 1, 2, 3 … …,8. When j takes 3, j is required to be calculated at equal to or less than j, namely the number of branches cut by each branch pool in the 1 st, 2 nd and 3 rd rounds.
i represents the branch to be cut in the j round, wherein n represents the total amount to be cut in the j round and is calculated by the server through the formula.
R fj The ratio of the grid load cut in the j turns specified in the low frequency load shedding scheme is shown. The factor 1.05 gives the appropriate amount of preload to ensure that the load can be cut off reliably in sufficient quantities.
S n Representing the total grid supply load of the current power grid.
A set of resected shunts for each shunt pool is generated. Each set includes a plurality of branches. For example, the first round of branch pool includes a branch, B branch and C branch, the first cut set corresponding to the first round of branch pool obtained by calculation according to the formula includes a branch and B branch, the second round of branch pool includes D branch, E branch and F branch, and the second cut set corresponding to the second round of branch pool obtained by calculation according to the formula includes E branch and F branch. And then constructing a preset low-frequency load shedding control model according to the plurality of operation data and the corresponding cutting sequences.
Step 130: and generating a tripping instruction according to the cutting sequence so as to cut off the corresponding branch of the power grid.
And dynamically judging the set of branches to be cut off in each turn according to the following formula to form a dynamic low-frequency load shedding scheme. When the power grid encounters systematic faults and the frequency is reduced to the action value of the low-frequency load shedding scheme, the low-frequency load shedding control system can dynamically make a load shedding strategy according to the current power grid frequency, the strategy comprises a shunt pool of each turn of action related to the current power grid frequency, an action tripping instruction is further sent, and the action tripping instruction is sent to each substation low-frequency load shedding device through a power communication data private network to act on tripping.
In the formula:
Figure BDA0003782368190000051
j represents the action constant value when the current power grid frequency reaches the j round, and j is 1, 2, 3 … …,8. When j is 3, j is calculated to be less than or equal to j, namely the number of branches cut by each branch pool in the 1 st, 2 nd and 3 rd rounds.
i represents the branch to be cut in the j round, wherein n represents the total amount to be cut in the j round and is calculated by the server through the formula.
R fj The ratio of the grid load cut in the j turns specified in the low frequency load shedding scheme is shown. The factor 1.05 gives the appropriate amount of preload to ensure that the load can be cut off reliably in sufficient quantities.
S n Representing the total grid supply load of the current power grid.
The application provides a low-frequency load shedding control method, device, system and medium based on a power grid, which comprises the following steps: when the frequency of the power grid is reduced to a preset frequency threshold value, acquiring operation data of the power grid when the low-frequency load shedding controls each branch circuit, determining a cutting sequence according to the operation data and a preset low-frequency load shedding control model, and generating a tripping instruction according to the cutting sequence to cut off the corresponding branch circuit of the power grid. The corresponding cutting sequence is determined through the operation data and a preset di Lin Jianzai control model, and the real-time load of the power grid is adjusted through the cutting sequence, so that a low-frequency load shedding mechanism can be changed along with the condition of the power grid, and the safety of the power grid is improved.
Fig. 2 is a schematic flow chart of a control method for grid-based low-frequency load shedding according to another exemplary embodiment of the present application. As shown in fig. 2, step 110 may include:
step 111: and acquiring operation data of the power grid when the low-frequency load shedding control is carried out on each branch, wherein the operation data comprises current, load of the power grid, voltage and frequency.
In the embodiment of the invention, real-time data of the current, load and power grid load, voltage and frequency of all 35kV and 10kV branches of the low-frequency load shedding control can be called from the low-frequency load shedding control.
Fig. 3 is a flowchart illustrating a method for constructing a preset low-frequency deloading control model according to an exemplary embodiment of the present application. As shown in fig. 3, the construction of the preset low-frequency load shedding control model includes:
step 140: obtaining operation data of a plurality of branches.
Step 150: each split is matched to a different frequency of the split pool according to the load nature of the operational data.
Step 160: and forming a fixed excision sequence by the plurality of shunt pools according to a regional equilibrium distribution principle.
Step 170: and constructing a preset low-frequency load shedding control model according to the plurality of cutting sequences and the plurality of operation data.
The method comprises the steps of obtaining operation data of a plurality of branches of a power grid, matching each branch with branch pools with different frequencies according to load properties, and forming a fixed cutting sequence by the matched branch pools according to a regional balance distribution principle. And by the formula:
Figure BDA0003782368190000061
j represents the action constant value when the current power grid frequency reaches the j round, and j is 1, 2, 3 … …,8. When j takes 3, j is required to be calculated at equal to or less than j, namely the number of branches cut by each branch pool in the 1 st, 2 nd and 3 rd rounds.
i represents the branch to be cut in the j round, wherein n represents the total amount to be cut in the j round and is calculated by the server through the formula.
R fj The ratio of the grid load cut in the j turns specified in the low frequency load shedding scheme is shown. The factor 1.05 gives the appropriate amount of preload to ensure that the load can be cut off reliably in sufficient quantities.
S n Representing the total grid supply load of the current power grid.
A set of excised branches for each branch pool is generated. Each set includes a plurality of branches. For example, the first round of branch pool includes a branch, B branch and C branch, the first cut set corresponding to the first round of branch pool obtained by calculation according to the formula includes a branch and B branch, the second round of branch pool includes D branch, E branch and F branch, and the second cut set corresponding to the second round of branch pool obtained by calculation according to the formula includes E branch and F branch. And then constructing a preset low-frequency load shedding control model according to the plurality of operation data and the corresponding cutting sequences. In addition, the shunt of each shunt pool is relatively fixed, for example, the shunt A only has a first round shunt pool and does not have a second round shunt pool. Also for example, D-shunts only have a second round shunt pool and no first round pool.
Fig. 4 is a flowchart illustrating a method for constructing a preset low-frequency deloading control model according to an exemplary embodiment of the present application. As shown in fig. 4, step 160 may include:
step 161: and calculating to obtain the cutting sequence according to the plurality of operation data and the proportion of the grid load cut by the target turns.
Wherein the formula is:
Figure BDA0003782368190000062
j represents the action constant value when the current power grid frequency reaches the j round, and j is 1, 2, 3 … …,8. When j takes 3, j is required to be calculated at equal to or less than j, namely the number of branches cut by each branch pool in the 1 st, 2 nd and 3 rd rounds.
i represents the branch needing to be cut in the j round, wherein n represents the total quantity needing to be cut in the j round, and the total quantity is calculated by the server through the formula.
R fj The ratio of the grid load cut for the j turns specified in the under-frequency load shedding scheme is shown. The factor 1.05 gives the appropriate amount of preload to ensure that the load can be cut off reliably in sufficient quantities.
U i And indicating the voltage value corresponding to the shunt circuit i needing to be cut off in the j-th turn.
I i And indicating the current value corresponding to the shunt i needing to be cut off in the j-th turn.
Fig. 5 is a flowchart illustrating a method for constructing a preset low-frequency deloading control model according to an exemplary embodiment of the present application. As shown in fig. 5, step 150 may include:
step 151: matching each branch with a pool of branches of different frequencies according to the user properties of each branch and the load properties of the operating data.
In one embodiment, step 151 may be implemented as: matching each branch with a different frequency of branch pool according to the user property of each branch, the load property of the operation data and the power supply area of each branch.
The user properties comprise civil users, industrial users, important users and the like. Each tap may be matched to a pool of taps of different frequencies depending on user performance. For example, a pool of shunts for a civilian user may be set to switch shunts for the first turn, etc. And the power supply area is a geographical position area, and each shunt is matched with shunt pools with different frequencies according to different geographical position areas. For example, the geographic location is at location a, then the split pool corresponding to location a may be set as the second round of switched split, and so on.
In one embodiment, step 150 may be implemented as: and matching each branch with a branch pool with different frequencies according to the load property of the operation data, wherein the ratio of the total load of the branches in the branch pools on a target day to the load supplied by the whole network is not lower than the target control proportion of the frequency corresponding to the branch pools.
In order to ensure that the requirement of the low-frequency load shedding control proportion can be met when the load fluctuation of the power grid is large, the ratio of the total load of all branches in each round of branch pool in typical days of winter and summer to the load supply of the whole power grid is not lower than 1.5 times of the requirement of the frequency control proportion in the low-frequency load shedding scheme.
Fig. 6 is a schematic structural diagram of a monitoring device for a distribution network area according to an exemplary embodiment of the present application. As shown in fig. 6, the monitoring device 20 for distribution network areas includes: the obtaining module 201 is configured to obtain operation data when the low-frequency load shedding of the power grid controls each shunt circuit when the frequency of the power grid is reduced to a preset frequency threshold; a determining module 202, configured to determine a resection sequence according to the operation data and a preset low-frequency load shedding control model; and a generating module 203 for generating a trip instruction to cut off the corresponding shunt according to the cutting sequence.
The application provides a controlling means of low frequency deloading based on electric wire netting includes: the obtaining module 201 obtains operation data of each branch circuit of the low-frequency load shedding control of the power grid when the frequency of the power grid is reduced to a preset frequency threshold value, the determining module 202 determines a cutting sequence according to the operation data and a preset low-frequency load shedding control model, and the generating module 203 generates a tripping instruction according to the cutting sequence to cut off the corresponding branch circuit of the power grid. The corresponding cutting sequence is determined through the operation data and a preset di Lin Jianzai control model, and the real-time load of the power grid is adjusted through the cutting sequence, so that a low-frequency load shedding mechanism can be changed along with the condition of the power grid, and the safety of the power grid is improved.
Fig. 7 is a schematic structural diagram of a monitoring device for a distribution network area according to another exemplary embodiment of the present application. As shown in fig. 7, the monitoring device 20 in the distribution network area is specifically configured to: acquiring operation data of a power grid when low-frequency load shedding controls each branch circuit; the operation data includes current, load, and load, voltage, and frequency of the power grid.
In one embodiment, as shown in fig. 7, the grid-based control of low frequency shedding may include:
a data acquisition unit 204 configured to acquire operation data of the plurality of branches;
a matching unit 205, configured to match each of the branches with a branch pool of a different frequency according to a load property of the operating data;
a fixing unit 206, configured to form a fixed excision sequence for the multiple branching pools according to a regional equilibrium distribution principle; and
the constructing unit 207 is configured to construct a preset low-frequency load shedding control model according to the plurality of cutting sequences and the plurality of operation data.
In an embodiment, the fixing unit 206 is specifically configured to: and calculating to obtain a cutting sequence according to the plurality of operation data and the proportion of the grid load cut by the target turn.
In an embodiment, the matching unit 205 is specifically configured to:
matching each branch with a pool of branches of different frequencies according to the user properties of each branch and the load properties of the operating data.
In an embodiment, the matching unit 205 is specifically configured to:
matching each branch with a different frequency of branch pool according to the user property of each branch, the load property of the operation data and the power supply area of each branch.
In an embodiment, the matching unit 205 is specifically configured to:
matching each branch with a branch pool with different frequencies according to the load property of the running data; and the ratio of the total load of the branches in the branch pool on the target day to the load supplied by the whole network is not lower than the target control ratio of the frequency corresponding to the branch pool.
The application provides a detection system who joins in marriage net platform district includes: the detection device of the network distribution platform area and the main station server are in communication connection with the detection device, and the main station server is used for controlling the detection device to work.
The application provides a control system of low frequency deloading based on electric wire netting includes: the detection device of the network distribution platform area and the main station server are in communication connection with the detection device, and the main station server is used for controlling the detection device to work. The corresponding cutting sequence is determined through the operation data and a preset di Lin Jianzai control model, and the real-time load of the power grid is adjusted through the cutting sequence, so that a low-frequency load shedding mechanism can be changed along with the condition of the power grid, and the safety of the power grid is improved.
Next, an electronic apparatus according to an embodiment of the present application is described with reference to fig. 8. The electronic device may be either or both of the first device and the second device, or a stand-alone device separate from them, which stand-alone device may communicate with the first device and the second device to receive the acquired input signals therefrom.
FIG. 8 illustrates a block diagram of an electronic device in accordance with an embodiment of the present application.
As shown in fig. 8, the electronic device 10 includes one or more processors 11 and memory 12.
The processor 11 may be a Central Processing Unit (CPU) or other form of processing unit having data processing capabilities and/or instruction execution capabilities, and may control other components in the electronic device 10 to perform desired functions.
Memory 12 may include one or more computer program products that may include various forms of computer-readable storage media, such as volatile memory and/or non-volatile memory. The volatile memory may include, for example, random Access Memory (RAM), cache memory (cache), and/or the like. The non-volatile memory may include, for example, read Only Memory (ROM), hard disk, flash memory, etc. One or more computer program instructions may be stored on the computer readable storage medium and executed by the processor 11 to implement the control method for grid-based low frequency shedding of the various embodiments of the present application described above and/or other desired functions. Various contents such as an input signal, a signal component, a noise component, etc. may also be stored in the computer-readable storage medium.
In one example, the electronic device 10 may further include: an input device 13 and an output device 14, which are interconnected by a bus system and/or other form of connection mechanism (not shown).
For example, when the electronic device is a stand-alone device, the input means 13 may be a communication network connector for receiving the acquired input signals from the first device and the second device.
The input device 13 may also include, for example, a keyboard, a mouse, and the like.
The output device 14 may output various information including the determined distance information, direction information, and the like to the outside. The output devices 14 may include, for example, a display, speakers, a printer, and a communication network and its connected remote output devices, among others.
Of course, for simplicity, only some of the components of the electronic device 10 relevant to the present application are shown in fig. 8, and components such as buses, input/output interfaces, and the like are omitted. In addition, the electronic device 10 may include any other suitable components depending on the particular application.
In addition to the above-described methods and apparatus, embodiments of the present application may also be a computer program product comprising computer program instructions which, when executed by a processor, cause the processor to perform the steps in the control method for grid-based low frequency shedding according to various embodiments of the present application described in the above-mentioned "exemplary methods" section of this specification.
The computer program product may be written with program code for performing the operations of embodiments of the present application in any combination of one or more programming languages, including an object oriented programming language such as Java, C + + or the like and conventional procedural programming languages, such as the "C" programming language or similar programming languages. The program code may execute entirely on the user's computing device, partly on the user's device, as a stand-alone software package, partly on the user's computing device and partly on a remote computing device, or entirely on the remote computing device or server.
Furthermore, embodiments of the present application may also be a computer readable storage medium having stored thereon computer program instructions which, when executed by a processor, cause the processor to perform the steps in the control method for grid based low frequency shedding according to various embodiments of the present application described in the "exemplary methods" section above in this description.
The computer-readable storage medium may take any combination of one or more readable media. The readable medium may be a readable signal medium or a readable storage medium. A readable storage medium may include, for example, but not limited to, an electronic, magnetic, optical, electromagnetic, infrared, or semiconductor system, apparatus, or device, or a combination of any of the foregoing. More specific examples (a non-exhaustive list) of the readable storage medium include: an electrical connection having one or more wires, a portable diskette, a hard disk, a Random Access Memory (RAM), a read-only memory (ROM), an erasable programmable read-only memory (EPROM or flash memory), an optical fiber, a portable compact disc read-only memory (CD-ROM), an optical storage device, a magnetic storage device, or any suitable combination of the foregoing.
The foregoing describes the general principles of the present application in conjunction with specific embodiments, however, it is noted that the advantages, effects, etc. mentioned in the present application are merely examples and are not limiting, and they should not be considered essential to the various embodiments of the present application. Furthermore, the foregoing disclosure of specific details is for the purpose of illustration and description and is not intended to be limiting, since the foregoing disclosure is not intended to be exhaustive or to limit the disclosure to the precise details disclosed.
The block diagrams of devices, apparatuses, devices, systems referred to in this application are only used as illustrative examples and are not intended to require or imply that they must be connected, arranged, or configured in the manner shown in the block diagrams. These devices, apparatuses, devices, systems may be connected, arranged, configured in any manner, as will be appreciated by those skilled in the art. Words such as "including," "comprising," "having," and the like are open-ended words that mean "including, but not limited to," and are used interchangeably therewith. The words "or" and "as used herein mean, and are used interchangeably with, the word" and/or, "unless the context clearly dictates otherwise. The word "such as" is used herein to mean, and is used interchangeably with, the phrase "such as but not limited to".
It should also be noted that in the devices, apparatuses, and methods of the present application, the components or steps may be decomposed and/or recombined. These decompositions and/or recombinations are to be considered as equivalents of the present application.
The previous description of the disclosed aspects is provided to enable any person skilled in the art to make or use the present application. Various modifications to these aspects will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other aspects without departing from the scope of the application. Thus, the present application is not intended to be limited to the aspects shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.
The foregoing description has been presented for purposes of illustration and description. Furthermore, the description is not intended to limit embodiments of the application to the form disclosed herein. While a number of example aspects and embodiments have been discussed above, those of skill in the art will recognize certain variations, modifications, alterations, additions and sub-combinations thereof.

Claims (10)

1. A low-frequency load shedding control method based on a power grid is characterized by comprising the following steps:
when the frequency of the power grid is reduced to a preset frequency threshold value, acquiring operation data of the power grid when the low-frequency load shedding controls each shunt circuit;
determining a cutting sequence according to the operation data and a preset low-frequency load shedding control model; and
and generating a tripping instruction according to the cutting sequence so as to cut off the corresponding branch of the power grid.
2. The method for controlling grid-based low-frequency load shedding according to claim 1, wherein the obtaining of the operation data when the low-frequency load shedding of the grid controls each branch comprises:
acquiring operation data of each branch circuit of the low-frequency load shedding control of the power grid; wherein the operational data includes current, load, and load, voltage, and frequency of the power grid.
3. The power grid-based low-frequency load shedding control method according to claim 1, wherein the construction of the preset low-frequency load shedding control model comprises:
acquiring operation data of a plurality of branches;
matching each of the branches with a branch pool of a different frequency according to a load property of the operating data;
forming a fixed cutting sequence for the matched multiple shunting pools according to a regional equilibrium distribution principle; and
and constructing the preset low-frequency load shedding control model according to the plurality of cutting sequences and the plurality of operation data.
4. The power grid-based low-frequency load shedding control method according to claim 3, wherein the forming of the plurality of shunt pools into a fixed shedding sequence according to a regional equilibrium distribution principle comprises:
and calculating to obtain the cutting sequence according to the plurality of operation data and the proportion of the grid load cut by the target turns.
5. A grid-based control method of underfrequency deloading according to claim 3, wherein the matching of each shunt with a pool of shunts of different frequency according to the load nature of the operational data comprises:
matching each branch with a branch pool of different frequencies according to the user property of each branch and the load property of the running data.
6. The grid-based control method of low frequency shedding according to claim 5, wherein the matching of each branch with a pool of branches of different frequencies according to the user properties of the branch and the load properties of the operational data comprises:
matching each branch with a different frequency of branch pool according to the user property of each branch, the load property of the running data and the power supply area of each branch.
7. The grid-based control method of low frequency shedding according to claim 3, wherein matching the each shunt with a shunt pool of different frequencies according to load properties of the operational data comprises:
matching each of the branches with a branch pool of a different frequency according to a load property of the operating data; the ratio of the total load of the branches in the branch pool on a target day to the total network supply load is not lower than the target control ratio of the corresponding frequency of the branch pool.
8. The utility model provides a join in marriage monitoring devices in net platform district which characterized in that includes:
the acquisition module is used for acquiring operation data of each branch circuit of the low-frequency load shedding control of the power grid when the frequency of the power grid is reduced to a preset frequency threshold;
the determining module is used for determining a cutting sequence according to the operation data and a preset low-frequency load shedding control model; and
and the generating module is used for generating a tripping instruction according to the cutting sequence so as to cut off the corresponding branch circuit.
9. The utility model provides a join in marriage detection system in net platform district which characterized in that includes:
the device for detecting distribution network areas of claim 8; and
and the master station server is in communication connection with the detection device and is used for controlling the detection device to work.
10. A computer-readable storage medium, storing a computer program for executing the grid-based low frequency shedding control method according to any one of claims 1 to 7.
CN202210932857.1A 2022-08-04 2022-08-04 Power grid-based low-frequency load shedding control method, device, system and medium Pending CN115395504A (en)

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN117895532A (en) * 2024-01-15 2024-04-16 金陵科技学院 Low-frequency load shedding method for centralized photovoltaic frequency modulation and distributed photovoltaic grid connection influence

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN117895532A (en) * 2024-01-15 2024-04-16 金陵科技学院 Low-frequency load shedding method for centralized photovoltaic frequency modulation and distributed photovoltaic grid connection influence

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