CN112419088A - Load shedding method, system, device, computer equipment and storage medium - Google Patents
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Abstract
The application relates to a load shedding method, a system, a device, a computer device and a storage medium. The method comprises the following steps: under the condition that the power distribution station is overloaded, the power distribution station control module acquires operation data of all substations in the power distribution station topological network, determines a plurality of candidate load shedding strategies according to the operation data of all the substations and the preset priority sequence of all the substations, determines a target load shedding strategy from all the candidate load shedding strategies according to a preset optimization target, and executes load shedding operation according to the target load shedding strategy. In the method, the priority sequence of the transformer substations is used for representing the importance degree of the transformer substations in the topological network, and the target load shedding strategy is determined according to the operation data, the priority sequence and the preset optimization target of each transformer substation, so that the reserved transformer substations with higher importance degree can ensure the minimum actual load shedding amount and reduce the consumption cost on the premise of normal operation of the transformer substations in the topological network.
Description
Technical Field
The present application relates to the field of power technologies, and in particular, to a load shedding method, system, apparatus, computer device, and storage medium.
Background
The society increasingly demands for power supply, and whether a power system is safe and stable affects the reliability of power supply. In a topological network comprising a distribution substation and a plurality of substations, the distribution substation determines the load condition of each substation based on the safety and stability control device of each substation and monitors the whole load condition of the topological network by installing the safety and stability control device in the plurality of substations.
In the prior art, under the condition of overload of a load, a distribution substation generally sends a stability control command to corresponding substations according to the distance sequence of the substations in a topological network or randomly, so that the substations execute load shedding operation according to the stability control command to prevent large-area power failure and power grid breakdown.
However, the indiscriminate load shedding operation, such as the sequential load shedding operation or the random load shedding operation, in the above-described technique results in a high cutting cost.
Disclosure of Invention
In view of the above, it is necessary to provide a load shedding method, system, apparatus, computer device, and storage medium that reduce the load shedding cost.
In a first aspect, a load shedding method is provided, the method comprising:
under the condition that the power distribution station is overloaded, acquiring operation data of all substations in a power distribution station topological network;
determining a plurality of candidate load shedding strategies according to the operation data of each transformer substation and the preset priority sequence of each transformer substation; the priority order of the transformer substations is used for representing the importance degree of the transformer substations in the topological network;
and determining a target load shedding strategy from all candidate load shedding strategies according to a preset optimization target, and executing load shedding operation according to the target load shedding strategy.
In one embodiment, the determining a plurality of candidate load shedding policies according to the operation data of each substation and the preset priority order of each substation includes:
determining the load shedding amount of each transformer substation according to the operation data of each transformer substation;
and determining a plurality of candidate load shedding strategies according to the priority order of each transformer substation and the load shedding amount of each transformer substation.
In one embodiment, the determining a plurality of candidate load shedding strategies according to the priority order of each substation and the load shedding amount of each substation includes:
executing load shedding operation according to the current overload amount;
recalculating the overload amount, returning to execute the step of executing load shedding operation according to the current overload amount until the load of the power distribution station is normal, and determining the current shedding process as a candidate load shedding strategy;
wherein the load shedding operation comprises:
according to the priority sequence of each transformer substation, determining the transformer substations to be cut off;
determining the load shedding amount of the transformer substation according to the operation data of the transformer substation;
and executing load shedding operation according to the load shedding amount.
In one embodiment, the determining the target load shedding policy from all the candidate load shedding policies according to the preset optimization target includes:
carrying out simulation calculation on each candidate load shedding strategy, and determining the number of the remaining substations and the total load shedding number of each candidate load shedding strategy;
and determining a target load shedding strategy according to the number of the remaining substations of each candidate load shedding strategy, the total load shedding number and the optimization target.
In one embodiment, the determining the target load shedding policy according to the number of remaining substations, the total number of load shedding and the optimization target of each candidate load shedding policy includes:
calculating the sum of the weights of the remaining substations in each candidate load shedding strategy according to the number of the remaining substations of each candidate load shedding strategy and the preset weight corresponding to the priority order of each substation;
and determining a target load shedding strategy by taking the maximum weight sum and the minimum load shedding total number of the remaining transformer substations as optimization targets.
In one embodiment, the executing the load shedding operation according to the target load shedding policy includes:
sending a load shedding operation instruction to each transformer substation control module to enable each transformer substation to execute load shedding operation; the load shedding operation instruction comprises a load shedding number and a substation identifier.
In a second aspect, there is provided a load shedding system, the system comprising: a distribution station control module and a plurality of substation control modules in the topology network;
a distribution station control module, configured to perform the load shedding method provided in the first aspect;
and the transformer substation control module is used for sending the operation data of each transformer substation to the distribution station control module and executing load shedding operation according to the load shedding operation instruction sent by the distribution station control module.
In a third aspect, there is provided a load shedding apparatus, the apparatus comprising:
the acquisition module is used for acquiring the operation data of all substations in the topological network of the power distribution station under the condition that the power distribution station is overloaded;
the determining module is used for determining a plurality of candidate load shedding strategies according to the operation data of each transformer substation and the preset priority sequence of each transformer substation; the priority order of the transformer substations is used for representing the importance degree of the transformer substations in the topological network;
and the execution module is used for determining a target load shedding strategy from all the candidate load shedding strategies according to a preset optimization target and executing load shedding operation according to the target load shedding strategy.
In a fourth aspect, there is provided a computer device comprising a memory and a processor, the memory storing a computer program, the processor implementing the load shedding method according to any one of the first aspect when executing the computer program.
In a fifth aspect, there is provided a computer readable storage medium having stored thereon a computer program which, when executed by a processor, implements the load shedding method of any of the first aspects described above.
According to the load shedding method, the system, the device, the computer equipment and the storage medium, under the condition that the distribution substation is overloaded, the distribution substation control module obtains the operation data of all substations in the distribution substation topological network, determines a plurality of candidate load shedding strategies according to the operation data of all the substations and the preset priority order of all the substations, determines a target load shedding strategy from all the candidate load shedding strategies according to a preset optimization target, and executes load shedding operation according to the target load shedding strategy. In the method, the priority sequence of the transformer substations is used for representing the importance degree of the transformer substations in the topological network, and the target load shedding strategy is determined according to the operation data, the priority sequence and the preset optimization target of each transformer substation, so that the reserved transformer substations with higher importance degree can ensure the minimum actual load shedding amount and reduce the consumption cost on the premise of normal operation of the transformer substations in the topological network.
Drawings
FIG. 1 is a diagram of an exemplary load shedding methodology;
FIG. 2 is a schematic flow chart of a load shedding method in one embodiment;
FIG. 3 is a flow diagram illustrating a load shedding method according to one embodiment;
FIG. 4 is a schematic flow chart diagram illustrating a load shedding methodology in one embodiment;
FIG. 5 is a flow diagram illustrating a load shedding method according to one embodiment;
FIG. 6 is a flow diagram illustrating a load shedding method according to one embodiment;
FIG. 7 is a flow diagram illustrating a load shedding method according to one embodiment;
FIG. 8 is a flow diagram illustrating a load shedding method according to one embodiment;
FIG. 9 is a block diagram showing the structure of a load shedding apparatus according to an embodiment;
FIG. 10 is a diagram showing an internal structure of a computer device according to an embodiment.
Detailed Description
In order to make the objects, technical solutions and advantages of the present application more apparent, the present application is described in further detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present application and are not intended to limit the present application.
The load shedding method provided by the application can be applied to the application environment shown in fig. 1. Wherein, fig. 1 shows a schematic structural diagram of a load shedding system, which includes: the system comprises a distribution station control module 1 and a plurality of transformer substation control modules 2, wherein the distribution station control module 1 is communicated with each transformer substation control module 2 through a network.
The following describes in detail the technical solutions of the present application and how the technical solutions of the present application solve the above technical problems by embodiments and with reference to the drawings. The following several specific embodiments may be combined with each other, and details of the same or similar concepts or processes may not be repeated in some embodiments. It should be noted that, in the load shedding method provided in the embodiments of fig. 2 to fig. 8 of the present application, the execution main body is the substation control module, and may also be a load shedding device, where the load shedding device may be a part or all of the substation control module by software, hardware, or a combination of software and hardware. In the following method embodiments, the execution subject is a substation control module as an example.
In one embodiment, as shown in fig. 2, a load shedding method is provided, which relates to a process that in the case of overload of a distribution substation, a distribution substation control module determines a plurality of candidate load shedding strategies according to operation data of each substation and a preset priority order of each substation, determines a target load shedding strategy from all candidate load shedding strategies according to a preset optimization target, and performs load shedding operation according to the target load shedding strategy, and includes the following steps:
s201, acquiring operation data of all substations in the topological network of the power distribution station under the condition that the power distribution station is overloaded.
The operation data of the transformer substation comprises data of output voltage, output current, output power, current load, maximum load carrying capacity, maximum load shedding capacity and the like of the transformer substation.
In this embodiment, the substation control module acquires the operation data of each substation under the condition of overload, and optionally, the substation control module may send a data acquisition instruction to each substation control module, so that each substation returns corresponding data to the substation control module after receiving the data acquisition instruction, which is not limited in this embodiment.
S202, determining a plurality of candidate load shedding strategies according to the operation data of each transformer substation and the preset priority sequence of each transformer substation; the priority order of the substations is used to characterize how important the substations are in the topological network.
The priority order of each substation refers to the importance degree of the substation in the topological network, for example, the importance degree of the substations located in a dense population place is higher, and the importance degree of the substations located in a sparse population place is lower; the importance of substations with more surrounding industrial parks is higher, and the importance of substations with fewer surrounding industrial parks is lower.
In this embodiment, after the substation control module acquires the operation data of each substation, it determines the maximum load amount that each substation can be cut off, and determines the candidate load shedding policy according to the overload amount of the current load and the priority order of each substation. For example, the overload amount of the current load is 50MW, the maximum load shedding amount of each substation is 10MW, the first candidate load shedding policy is that the substation 1 with the priority level 1 sheds 10MW, the substation 2 with the priority level 2 sheds 10MW, the substation 3 with the priority level 3 sheds 10MW, the substation 4 with the priority level 4 sheds 10MW, and the substation 5 with the priority level 5 sheds 10MW, which is not limited in this embodiment.
S203, according to a preset optimization target, determining a target load shedding strategy from all candidate load shedding strategies, and executing load shedding operation according to the target load shedding strategy.
The preset optimization target is determined according to actual requirements, optionally, in consideration of the removal cost, the optimization target may be the minimum actual load shedding amount, or the optimization target may also be the maximum number of substations with higher retention priority, and the like.
In this embodiment, a target load shedding policy is determined according to a preset optimization target. For example, if the current optimization target is the actual load shedding amount which is the minimum, the substation control module obtains the actual load shedding amounts of all candidate load shedding strategies, and determines the candidate load shedding strategy with the minimum actual load shedding amount as the target load shedding strategy. Optionally, the optimization target may also be multiple optimization targets, and at this time, the target load shedding policy is determined according to the set weight corresponding to each target and the results of all candidate load shedding policies. After determining the target load shedding strategy, the substation control module may send a load shedding operation to the relevant substation control module, so that the corresponding substation control module performs the load shedding operation; or, the substation control module may also directly perform load shedding operation on the relevant substation, which is not limited in this embodiment.
According to the load shedding method, under the condition that the distribution substation is overloaded, the distribution substation control module acquires the operation data of all substations in the distribution substation topological network, determines a plurality of candidate load shedding strategies according to the operation data of all the substations and the preset priority sequence of all the substations, determines a target load shedding strategy from all the candidate load shedding strategies according to a preset optimization target, and executes load shedding operation according to the target load shedding strategy. In the method, the priority sequence of the transformer substations is used for representing the importance degree of the transformer substations in the topological network, and the target load shedding strategy is determined according to the operation data, the priority sequence and the preset optimization target of each transformer substation, so that the reserved transformer substations with higher importance degree can ensure the minimum actual load shedding amount and reduce the consumption cost on the premise of normal operation of the transformer substations in the topological network.
In an embodiment, as shown in fig. 3, the determining a plurality of candidate load shedding policies according to the operation data of each substation and a preset priority order of each substation includes:
s301, determining the load shedding amount of each transformer substation according to the operation data of each transformer substation.
In this embodiment, after the substation control module acquires the operation data of each substation, the substation control module determines the maximum load that can be removed by each substation according to the operation data of each substation.
S302, determining a plurality of candidate load shedding strategies according to the priority order of each transformer substation and the load shedding amount of each transformer substation.
In the embodiment, the distribution substation control module determines the candidate load shedding strategy according to the overload amount of the current load and the priority order of each substation. For example, the overload amount of the current load is 50MW, the maximum load shedding amount of each substation is 10MW, and the first candidate load shedding policy is that the substation 1 with the priority 1 cuts 10MW, the substation 2 with the priority 2 cuts 10MW, the substation 3 with the priority 3 cuts 10MW, the substation 4 with the priority 4 cuts 10MW, and the substation 5 with the priority 5 cuts 10 MW. In practical situations, after the load shedding operation is performed on the first substation, the overall load overload may be dynamically adjusted, that is, after the load shedding operation of the substation 1 with priority 1 is performed, the current load overload is not 40MW, and by means of dynamic shunting, the current load overload may be 30MW, and in consideration of this situation, when determining the candidate load shedding strategy, after the load shedding operation is performed, it is necessary to wait for a period of time to keep the load stable, and then perform the second load shedding operation. Therefore, other candidate load shedding policies may also include: the transformer substation 1 firstly cuts off 10MW, the transformer substations 2-5 delay the action for 1s, and the transformer substations 2-5 cut off 30MW after the power flow is redistributed; the transformer substation 2 firstly cuts off 10MW, the transformer substations 1 and 3-5 delay the action for 1s, and the transformer substations 1 and 3-5 cut off 35MW after the tidal current is redistributed; the substation 3 cuts 10MW first, the substations 1, 2, 4, 5 delay the action for 1s, and the substations 1, 2, 4, 5 cut 25MW after the tidal current is redistributed, and the like.
In the embodiment, a plurality of candidate load shedding strategies are determined according to the priority order of each transformer substation and the actual maximum load shedding amount of each transformer substation, the importance degree and the actual load shedding amount of each transformer substation are comprehensively considered, and the load shedding cost is reduced to a certain degree.
In an embodiment, as shown in fig. 4, the determining a plurality of candidate load shedding policies according to the priority order of each substation and the load shedding amount of each substation includes:
and S401, executing load shedding operation according to the current overload capacity.
In this embodiment, the substation control module performs a load shedding operation according to the current load overload amount.
Optionally, the load shedding operation comprises:
s501, determining the transformer substations to be cut off according to the priority sequence of the transformer substations.
In this embodiment, the substation control module determines the substation to be cut off currently according to the priority order of each substation, for example, the substation control module determines that the substation in priority order 1 is the substation to be cut off, where priority order 1 indicates the lowest importance level.
And S502, determining the load shedding amount of the transformer substation according to the operation data of the transformer substation.
In this embodiment, after determining that the substation 1 is a substation to be cut off, the substation control module determines the maximum switchable load capacity of the substation 1 according to the operation data of the substation 1.
And S503, executing load shedding operation according to the load shedding amount.
In the present embodiment, the substation control module performs the load shedding operation according to the maximum load shedding amount of the substation 1.
S402, recalculating the overload amount, returning to the step of executing load shedding operation according to the current overload amount until the load of the power distribution station is normal, and determining that the current shedding process is a candidate load shedding strategy.
In this embodiment, after the distribution substation control module performs one load shedding operation, the load in the topology network may change, at this time, it needs to wait for a period of time to redistribute the load flow in the topology network, after redistribution, recalculate the current load overload amount, and perform the next load shedding operation according to the current load overload amount until the load in the topology network is in a normal state.
In the embodiment, the power distribution station control module executes one load shedding operation, so that once load shedding redistribution is executed, and further, the next load shedding operation is executed according to the current load overload capacity, so that the result of the load shedding operation is more accurate, and the load shedding cost is reduced to a certain extent.
In an embodiment, as shown in fig. 6, the determining the target load shedding policy from all the candidate load shedding policies according to the preset optimization target includes:
s601, carrying out simulation calculation on each candidate load shedding strategy, and determining the number of the remaining substations and the total load shedding number of each candidate load shedding strategy.
In this embodiment, each candidate load shedding strategy is substituted into a preset simulation tool for simulation, and the number of the remaining substations and the total load shedding number corresponding to each candidate load shedding strategy after the load shedding operation is performed are determined.
S602, determining a target load shedding strategy according to the number of the remaining substations, the total load shedding amount and the optimization target of each candidate load shedding strategy.
In this embodiment, after the distribution station control module performs simulation calculation on each load shedding policy, the priority order weight corresponding to each substation is determined according to the remaining substation data in the topology structure corresponding to each load shedding policy, and the target load shedding policy is determined according to the priority order weight corresponding to each substation, the actual load shedding amount, and the preset optimization target. Optionally, the substation control module may substitute the priority order weight and the actual load shedding amount corresponding to each substation into a preset optimization objective function, and determine a target load shedding policy according to an output result of the optimization objective function, which is not limited in this embodiment.
In the embodiment, the power distribution station control module constructs an optimization objective function according to actual requirements, determines a target load shedding strategy according to the optimization objective, and executes load shedding operation according to the target load shedding strategy, so that user requirements are met, and the load shedding cost is reduced.
In an embodiment, as shown in fig. 7, the determining the target load shedding policy according to the number of remaining substations, the total number of load shedding, and the optimization target of each candidate load shedding policy includes:
s701, calculating the sum of the weights of the remaining substations in each candidate load shedding strategy according to the number of the remaining substations of each candidate load shedding strategy and the preset weight corresponding to the priority order of each substation.
And the transformer substation configures corresponding weight values according to the corresponding priority order.
In this embodiment, after the distribution substation control module performs simulation calculation on each load shedding policy, the total weight of the remaining substations in each candidate load shedding policy is calculated according to the number of substations of each load shedding policy and the priority order weight corresponding to each substation. Exemplarily, 5 substations remain in the topological network of the ith candidate load shedding strategy, which are respectively the substation 6, and the corresponding priority order weight is 3; the substation 7 has a corresponding priority order weight of 4, and the substation 8 has a corresponding priority order weight of 5; the substation 9 has a corresponding priority order weight of 6; if the corresponding priority order weight of the substation 10 is 7, the sum of the weights of the ith candidate load shedding strategies is 25, which is not limited in this embodiment.
S702, determining a target load shedding strategy by taking the maximum weight sum and the minimum load shedding total number of the remaining substations as optimization targets.
In this embodiment, the distribution station control module calculates the sum of weights corresponding to the plurality of candidate load shedding strategies and the actual load shedding amount. Illustratively, the sum of the weights corresponding to the 1 st candidate load shedding strategy is 25, and the actual load shedding amount is 35 MW; the sum of the weights corresponding to the 1 st candidate load shedding strategy is 26, and the actual load shedding amount is 40 MW; the sum of the weights corresponding to the 1 st candidate load shedding strategy is 22, and the actual load shedding amount is 40 MW. Substituting the sum of the weights corresponding to the multiple candidate load shedding strategies and the actual load shedding amount into the optimization objective function, and determining that the candidate load shedding strategy with the largest sum of the weights and the smallest actual load shedding amount is the target load shedding strategy, which is not limited in this embodiment.
In this embodiment, the substation control module constructs an optimization objective function according to actual requirements, determines a target load shedding policy according to the optimization objective, and executes load shedding operation according to the target load shedding policy, so that the actual load shedding operation certainly meets the optimization objective, that is, the actual load shedding amount is met to the minimum in this embodiment, and the load shedding cost is reduced.
In an embodiment, the performing the load shedding operation according to the target load shedding policy includes:
sending a load shedding operation instruction to each transformer substation control module to enable each transformer substation to execute load shedding operation; the load shedding operation instruction comprises a load shedding number and a substation identifier.
In this embodiment, after determining the target load shedding policy, the substation control module may send a load shedding operation to the relevant substation control module, so that the corresponding substation control module performs the load shedding operation, which is not limited in this embodiment.
In this embodiment, the distribution substation control module may send a corresponding load shedding operation instruction to the corresponding substation control module according to the target load shedding policy, and the scheme simply and effectively achieves the purpose of load shedding of each substation.
To better explain the above method, as shown in fig. 8, the present embodiment provides a load shedding method, which specifically includes:
s101, acquiring operation data of all substations in a topological network of the power distribution station under the condition that the power distribution station is overloaded;
s102, determining load shedding amount of each transformer substation according to the operation data of each transformer substation;
s103, determining the transformer substations to be cut off according to the priority sequence of the transformer substations;
s104, determining the load shedding amount of the transformer substation according to the operation data of the transformer substation;
s105, executing load shedding operation according to the load shedding amount;
s106, calculating the current load amount, and judging whether an overload condition exists or not; if yes, returning to execute the step S103; if not, go to step S107;
s107, carrying out simulation calculation on each candidate load shedding strategy, and determining the number of the remaining substations and the total load shedding number of each candidate load shedding strategy;
s108, calculating the sum of the weights of the remaining substations in each candidate load shedding strategy according to the number of the remaining substations of each candidate load shedding strategy and the preset weight corresponding to the priority order of each substation;
s109, determining a target load shedding strategy by taking the maximum weight sum and the minimum load shedding total number of the remaining transformer substations as optimization targets;
and S110, sending a load shedding operation instruction to each substation control module to enable each substation to execute load shedding operation.
In this embodiment, because the priority order of the substations is used to represent the importance degree of the substations in the topological network, and the target load shedding policy is determined according to the operation data, the priority order, and the preset optimization target of each substation, the substation with higher importance degree is kept, so that the actual load shedding amount is minimum on the premise of ensuring the normal operation of the substations in the topological network, and the consumption cost is reduced.
The load shedding method provided by the above embodiment has the similar implementation principle and technical effect as those of the above method embodiment, and is not described herein again.
It should be understood that although the various steps in the flow charts of fig. 2-8 are shown in order as indicated by the arrows, the steps are not necessarily performed in order as indicated by the arrows. The steps are not performed in the exact order shown and described, and may be performed in other orders, unless explicitly stated otherwise. Moreover, at least some of the steps in fig. 2-8 may include multiple steps or multiple stages, which are not necessarily performed at the same time, but may be performed at different times, which are not necessarily performed in sequence, but may be performed in turn or alternately with other steps or at least some of the other steps.
In one embodiment, as shown in fig. 1, there is provided a load shedding system, the system comprising: a distribution substation control module 1 and a plurality of substation control modules 2 in the topology network;
a distribution substation control module 1 for performing the load shedding method provided in the above-described embodiments of fig. 2-8;
and the transformer substation control module 2 is used for sending the operation data of each transformer substation to the distribution station control module and executing load shedding operation according to the load shedding operation instruction sent by the distribution station control module.
The load shedding system provided in the above embodiment has the similar implementation principle and technical effect to those of the load shedding method embodiment, and is not described herein again.
In one embodiment, as shown in fig. 9, there is provided a load shedding apparatus, including: an obtaining module 01, a determining module 02 and a determining module 03, wherein:
the acquisition module 01 is used for acquiring the operation data of all substations in the topological network of the power distribution station under the condition that the power distribution station is overloaded;
the determining module 02 is used for determining a plurality of candidate load shedding strategies according to the operation data of each transformer substation and the preset priority order of each transformer substation; the priority order of the transformer substations is used for representing the importance degree of the transformer substations in the topological network;
and the executing module 03 is configured to determine a target load shedding policy from all candidate load shedding policies according to a preset optimization target, and execute load shedding operation according to the target load shedding policy.
In an embodiment, the determining module 02 is configured to determine a load shedding amount of each substation according to the operation data of each substation; and determining a plurality of candidate load shedding strategies according to the priority order of each transformer substation and the load shedding amount of each transformer substation.
In one embodiment, the determining module 02 is configured to perform load shedding according to the current overload amount; recalculating the overload amount, returning to execute the step of executing load shedding operation according to the current overload amount until the load of the power distribution station is normal, and determining the current shedding process as a candidate load shedding strategy;
wherein the load shedding operation comprises:
according to the priority sequence of each transformer substation, determining the transformer substations to be cut off; determining the load shedding amount of the transformer substation according to the operation data of the transformer substation; and executing load shedding operation according to the load shedding amount.
In an embodiment, the executing module 03 is configured to perform simulation calculation on each candidate load shedding policy, and determine the number of remaining substations and the total number of shedding loads of each candidate load shedding policy; and determining a target load shedding strategy according to the number of the remaining substations of each candidate load shedding strategy, the total load shedding number and the optimization target.
In an embodiment, the executing module 03 is configured to calculate a sum of weights of the remaining substations in each candidate load shedding policy according to the number of the remaining substations of each candidate load shedding policy and a preset weight corresponding to a priority order of each substation; and determining a target load shedding strategy by taking the maximum weight sum and the minimum load shedding total number of the remaining transformer substations as optimization targets.
In an embodiment, the executing module 03 is configured to send a load shedding operation instruction to each substation control module, so that each substation performs a load shedding operation; the load shedding operation instruction comprises a load shedding number and a substation identifier.
For the specific definition of the load shedding device, reference may be made to the above definition of the load shedding method, which is not described herein again. The modules in the load shedding device can be wholly or partially realized by software, hardware and a combination thereof. The modules can be embedded in a hardware form or independent from a processor in the computer device, and can also be stored in a memory in the computer device in a software form, so that the processor can call and execute operations corresponding to the modules.
In one embodiment, a computer device is provided, which may be a server, and its internal structure diagram may be as shown in fig. 10. The computer device includes a processor, a memory, a communication interface, a display screen, and an input device connected by a system bus. Wherein the processor of the computer device is configured to provide computing and control capabilities. The memory of the computer device comprises a nonvolatile storage medium and an internal memory. The non-volatile storage medium stores an operating system and a computer program. The internal memory provides an environment for the operation of an operating system and computer programs in the non-volatile storage medium. The communication interface of the computer device is used for carrying out wired or wireless communication with an external terminal, and the wireless communication can be realized through WIFI, an operator network, NFC (near field communication) or other technologies. The computer program is executed by a processor to implement a load shedding method. The display screen of the computer equipment can be a liquid crystal display screen or an electronic ink display screen, and the input device of the computer equipment can be a touch layer covered on the display screen, a key, a track ball or a touch pad arranged on the shell of the computer equipment, an external keyboard, a touch pad or a mouse and the like.
Those skilled in the art will appreciate that the architecture shown in fig. 10 is merely a block diagram of some of the structures associated with the disclosed aspects and is not intended to limit the computing devices to which the disclosed aspects apply, as particular computing devices may include more or less components than those shown, or may combine certain components, or have a different arrangement of components.
In one embodiment, a computer device is provided, comprising a memory and a processor, the memory having a computer program stored therein, the processor implementing the following steps when executing the computer program:
under the condition that the power distribution station is overloaded, acquiring operation data of all substations in a power distribution station topological network;
determining a plurality of candidate load shedding strategies according to the operation data of each transformer substation and the preset priority sequence of each transformer substation; the priority order of the transformer substations is used for representing the importance degree of the transformer substations in the topological network;
and determining a target load shedding strategy from all candidate load shedding strategies according to a preset optimization target, and executing load shedding operation according to the target load shedding strategy.
The implementation principle and technical effect of the computer device provided by the above embodiment are similar to those of the above method embodiment, and are not described herein again.
In one embodiment, a computer-readable storage medium is provided, having a computer program stored thereon, which when executed by a processor, performs the steps of:
under the condition that the power distribution station is overloaded, acquiring operation data of all substations in a power distribution station topological network;
determining a plurality of candidate load shedding strategies according to the operation data of each transformer substation and the preset priority sequence of each transformer substation; the priority order of the transformer substations is used for representing the importance degree of the transformer substations in the topological network;
and determining a target load shedding strategy from all candidate load shedding strategies according to a preset optimization target, and executing load shedding operation according to the target load shedding strategy.
The implementation principle and technical effect of the computer-readable storage medium provided by the above embodiments are similar to those of the above method embodiments, and are not described herein again.
It will be understood by those skilled in the art that all or part of the processes of the methods of the embodiments described above can be implemented by hardware instructions of a computer program, which can be stored in a non-volatile computer-readable storage medium, and when executed, can include the processes of the embodiments of the methods described above. Any reference to memory, storage, database or other medium used in the embodiments provided herein can include at least one of non-volatile and volatile memory. Non-volatile Memory may include Read-Only Memory (ROM), magnetic tape, floppy disk, flash Memory, optical storage, or the like. Volatile Memory can include Random Access Memory (RAM) or external cache Memory. By way of illustration and not limitation, RAM can take many forms, such as Static Random Access Memory (SRAM) or Dynamic Random Access Memory (DRAM), among others.
The technical features of the above embodiments can be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features in the above embodiments are not described, but should be considered as the scope of the present specification as long as there is no contradiction between the combinations of the technical features.
The above-mentioned embodiments only express several embodiments of the present application, and the description thereof is more specific and detailed, but not construed as limiting the scope of the invention. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the concept of the present application, which falls within the scope of protection of the present application. Therefore, the protection scope of the present patent shall be subject to the appended claims.
Claims (10)
1. A method of shedding load, the method comprising:
under the condition that a distribution station is overloaded, acquiring operation data of all substations in a distribution station topological network;
determining a plurality of candidate load shedding strategies according to the operation data of each transformer substation and the preset priority sequence of each transformer substation; the priority order of the transformer substations is used for representing the importance degree of the transformer substations in the topological network;
and according to a preset optimization target, determining a target load shedding strategy from all the candidate load shedding strategies, and executing load shedding operation according to the target load shedding strategy.
2. The method of claim 1, wherein the determining a plurality of candidate load shedding strategies according to the operation data of the substations and the preset priority order of the substations comprises:
determining load shedding amount of each transformer substation according to the operation data of each transformer substation;
and determining a plurality of candidate load shedding strategies according to the priority order of each transformer substation and the load shedding amount of each transformer substation.
3. The method of claim 2, wherein determining a plurality of candidate load shedding strategies according to the priority order of the substations and the load shedding amount of the substations comprises:
executing load shedding operation according to the current overload amount;
recalculating the overload amount, returning to execute the step of executing load shedding operation according to the current overload amount until the load of the power distribution station is normal, and determining that the current shedding process is a candidate load shedding strategy;
wherein the load shedding operation comprises:
according to the priority sequence of each transformer substation, determining the transformer substation to be cut off;
determining the load shedding amount of the transformer substation according to the operation data of the transformer substation;
and executing load shedding operation according to the load shedding amount.
4. The method according to claim 1, wherein the determining a target load shedding policy from all the candidate load shedding policies according to a preset optimization goal comprises:
carrying out simulation calculation on each candidate load shedding strategy, and determining the number of the remaining substations and the total load shedding number of each candidate load shedding strategy;
and determining a target load shedding strategy according to the number of the remaining substations of each candidate load shedding strategy, the total load shedding number and the optimization target.
5. The method of claim 4, wherein determining a target load shedding strategy according to the number of remaining substations, the total number of loads shed and the optimization goal of each of the candidate load shedding strategies comprises:
calculating the sum of the weights of the remaining substations in each candidate load shedding strategy according to the number of the remaining substations of each candidate load shedding strategy and the preset weight corresponding to the priority order of each substation;
and determining a target load shedding strategy by taking the maximum weight sum of the remaining substations and the minimum load shedding total number as optimization targets.
6. The method according to any one of claims 1 to 5, wherein the performing load shedding operations according to the target load shedding policy comprises:
sending a load shedding operation instruction to each transformer substation control module so that each transformer substation executes load shedding operation; the load shedding operation instruction comprises a load shedding number and a substation identifier.
7. A load shedding system, characterized in that the system comprises a distribution substation control module and a plurality of substation control modules in a topological network;
the substation control module, configured to perform the load shedding method according to any one of claims 1 to 6;
and the transformer substation control module is used for sending the operation data of each transformer substation to the distribution station control module and executing load shedding operation according to the load shedding operation instruction sent by the distribution station control module.
8. A load shedding apparatus, the apparatus comprising:
the acquisition module is used for acquiring the operation data of all substations in the distribution substation topological network under the condition that the distribution substation is overloaded;
the determining module is used for determining a plurality of candidate load shedding strategies according to the operation data of each transformer substation and the preset priority sequence of each transformer substation; the priority order of the transformer substations is used for representing the importance degree of the transformer substations in the topological network;
and the execution module is used for determining a target load shedding strategy from all the candidate load shedding strategies according to a preset optimization target and executing load shedding operation according to the target load shedding strategy.
9. A computer device comprising a memory and a processor, the memory storing a computer program, characterized in that the processor, when executing the computer program, implements the steps of the method of any of claims 1 to 6.
10. A computer-readable storage medium, on which a computer program is stored, which, when being executed by a processor, carries out the steps of the method of any one of claims 1 to 6.
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