CN111753442A - Distribution transformer replacement decision method and device - Google Patents

Abstract

The embodiment of the invention discloses a method and a device for switching decision of a distribution transformer. The switching decision method of the distribution transformer comprises the following steps: determining a heavy overload distribution transformer and a standby distribution transformer of a target area; formulating a replacement strategy of the heavy overload distribution transformer; establishing a strategy target value for evaluating the exchange strategy; arranging and combining different exchange strategies to obtain an exchange strategy group comprising different ordered exchange strategies, and simulating and exchanging the heavy overload distribution transformer according to the exchange strategy group; and calculating strategy target values corresponding to the exchange strategy groups with different sequences, determining the optimal sequence of the exchange strategies according to the strategy target values, and determining the optimal sequence as the optimal decision scheme for exchanging the overload distribution transformer. The technical scheme of the invention considers the aspects of solving the problem of heavy overload distribution transformer, improving the utilization rate of the standby distribution transformer, improving the comprehensive power failure index of a target area and improving the working efficiency of distribution transformer exchange so as to optimize the decision scheme to realize the exchange of the heavy overload distribution transformer.

Description

Distribution transformer replacement decision method and device

Technical Field

The embodiment of the invention relates to the technical field of power distribution, in particular to a method and a device for changing a distribution transformer.

Background

The replacement of the distribution transformer mainly solves the running risk that part of the transformers are overloaded during the peak-meeting summer, holidays or power-supply-guaranteeing period. The scheme of changing distribution transformer at present mainly makes through artifical collection, contrast, arrangement data back, can't realize resource optimization distribution, and some distribution transformer still have overload operation phenomenon after the change, influence power equipment's safety and stability operation.

Disclosure of Invention

The embodiment of the invention provides a distribution transformer exchange decision method and a distribution transformer exchange decision device, which are used for realizing exchange of a heavy overload distribution transformer by an optimized decision scheme.

In a first aspect, an embodiment of the present invention provides a method for deciding replacement of a distribution transformer, including:

determining a heavy overload distribution transformer and a standby distribution transformer of a target area;

formulating a replacement strategy of the heavy overload distribution transformer, wherein the replacement strategy comprises replacing the heavy overload distribution transformer and the heavy overload distribution transformer with the standby distribution transformer;

establishing a strategy target value for evaluating the exchange strategy, wherein the strategy target value comprises exchange frequency, exchange completion rate, distribution transformer exchange outage rate and standby exchange distribution transformer utilization rate;

arranging and combining different exchange strategies to obtain an exchange strategy group comprising the exchange strategies in different orders, and simulating and exchanging the heavy overload distribution transformer according to the exchange strategy group;

and calculating the strategy target values corresponding to the exchange strategy groups with different sequences, determining the optimal sequence of the exchange strategies according to the strategy target values, and determining the optimal sequence as the optimal decision scheme for exchanging the heavy overload distribution transformer.

Optionally, the standby distribution transformer comprises at least an inventory distribution transformer and a light load distribution transformer;

through it changes to be equipped with distribution transformer changes heavily transship distribution transformer includes: exchanging the heavy overload distribution transformer through the inventory distribution transformer, exchanging the heavy overload distribution transformer through the light load distribution transformer, and solving the heavy overload distribution transformer by standing;

the heavy overload distribution transformer is a distribution transformer with a load rate larger than or equal to a first load rate, and the light overload distribution transformer is a distribution transformer with a load rate smaller than or equal to a second load rate.

Optionally, the policy target value is represented as:

wherein Y is the strategy target value, f is the exchange frequency, R is the exchange completion rate, S is the power distribution transformation exchange outage rate, and T is the standby transformation power distribution transformation utilization rate.

Optionally, the heavy overload distribution transformer is interchanged, including:

sorting the heavily overloaded distribution transformers according to the capacity and the load rate of the distribution transformers;

judging whether the heavily overloaded distribution transformer in the first order can be exchanged with the heavily overloaded distribution transformer in the second order;

if the heavy overload distribution transformer in the first sequence can be exchanged with the heavy overload distribution transformer in the second sequence, exchanging is carried out, and whether the heavy overload distribution transformer in the second sequence can be exchanged with the heavy overload distribution transformer in the third sequence or not is continuously judged;

if the heavy overload distribution transformer sorted in the first order cannot be exchanged, the heavy overload distribution transformer sorted in the second order is switched to a distribution and transformation set which cannot be exchanged, and whether the heavy overload distribution transformer sorted in the first order can be exchanged or not is continuously judged;

and exchanging the heavy overload distribution transformers one by one, transferring the last exchanged heavy overload distribution transformer into inventory, and outputting and sequencing a distribution transformer set which cannot be exchanged.

Optionally, determining a heavily overloaded distribution transformer and a replacement distribution transformer for the target area includes:

acquiring distribution transformer data of a target area, wherein the distribution transformer data comprises the name, the capacity, the model and the maximum load of a distribution transformer;

obtaining heavy overload distribution transformer data and light overload distribution transformer data according to the distribution transformer data;

inventory distribution transformer data is obtained, wherein the inventory distribution transformer data includes a name, a capacity, and a model of a distribution transformer.

Optionally, exchanging the heavily overloaded distribution transformer through the inventory distribution transformer comprises:

sorting the heavily overloaded distribution transformer and the inventory distribution transformer respectively according to the capacity and the load rate of the distribution transformer;

judging whether the inventory distribution transformers can exchange the heavily overloaded distribution transformer with the first in sequence one by one according to the sequence of the inventory distribution transformers;

if the first heavily overloaded distribution transformer in the sequence can be exchanged, the replacement is carried out, the first heavily overloaded distribution transformer in the sequence is transferred into the inventory, and the sequence of the inventory distribution transformer is updated;

if the inventory distribution transformer can not be exchanged and the first heavily overloaded distribution transformer can not be exchanged, the heavily overloaded distribution transformer which is ordered first is transferred into a distribution and transformation set which can not be exchanged, and whether the inventory distribution transformer can be exchanged and the second heavily overloaded distribution transformer can be continuously judged one by one according to the ordering of the inventory distribution transformer;

and (4) replacing the heavy overload distribution transformers one by one, and outputting and sequencing distribution transformer sets which cannot be replaced.

Optionally, exchanging the heavy overload distribution transformer through the light load distribution transformer includes:

respectively sequencing the heavy overload distribution transformer and the light overload distribution transformer according to the capacity and the load rate of the distribution transformer;

judging whether the light-load distribution transformers can be exchanged with the heavy-load distribution transformers in the first sequence one by one according to the sequence of the light-load distribution transformers;

if the light-load distribution transformer can exchange the heavy-overload distribution transformer sequenced first, the light-load distribution transformer and the heavy-overload distribution transformer sequenced first are exchanged;

if the light-load distribution transformers can not be exchanged and the first heavy-load distribution transformers in the sequence are not exchanged, the heavy-load distribution transformers in the sequence are transferred into a distribution and transformation set which can not be exchanged, and whether the light-load distribution transformers can be exchanged and the second heavy-load distribution transformers in the sequence are continuously judged one by one according to the sequence of the light-load distribution transformers;

and replacing the heavy overload distribution transformer and the light overload distribution transformer one by one, and outputting and sequencing a distribution transformer set which cannot be replaced.

Optionally, the different exchange strategies are arranged and combined to obtain an exchange strategy group including the exchange strategies in different orders, and the replacement of the heavy overload distribution transformer is simulated according to the exchange strategy group, including:

exchanging the heavy overload distribution transformers, exchanging the heavy overload distribution transformers through the inventory distribution transformers, exchanging the heavy overload distribution transformers through the light load distribution transformers, and solving four exchange strategies of the heavy overload distribution transformers according to terms to be arranged and combined so as to obtain exchange strategy groups of the exchange strategies with different sequences;

executing each ordered set of switching strategies to perform simulated switching of the heavily overloaded distribution transformer.

Optionally, whether the distribution transformer is exchangeable with the heavy overload distribution transformer is determined according to whether the distribution transformer is the same as the heavy overload distribution transformer in type, and whether the corresponding load rate is less than a preset load rate when the distribution transformer simulates and exchanges the heavy overload distribution transformer.

In a second aspect, an embodiment of the present invention further provides a device for deciding replacement of a distribution transformer, including:

the distribution transformer determining module is used for determining a heavy overload distribution transformer and a standby distribution transformer in a target area;

the exchange strategy making module is used for making an exchange strategy of the heavy overload distribution transformer, wherein the exchange strategy comprises exchanging the heavy overload distribution transformer and the heavy overload distribution transformer through the standby exchange distribution transformer;

the strategy target value establishing module is used for establishing a strategy target value for evaluating the exchange strategy, wherein the strategy target value comprises exchange frequency, exchange completion rate, distribution transformer exchange outage rate and standby exchange distribution transformer utilization rate;

the distribution transformer simulation exchange module is used for carrying out permutation and combination on different exchange strategies to obtain an exchange strategy group comprising the exchange strategies in different sequences, and simulating and exchanging the heavy overload distribution transformer according to the exchange strategy group;

and the optimal decision scheme determining module is used for calculating the strategy target values corresponding to the exchange strategy groups with different sequences, determining the optimal sequence of the exchange strategies according to the strategy target values, and determining the optimal sequence as the optimal decision scheme for exchanging the heavy overload distribution transformer.

The technical scheme of the invention is that a heavy overload distribution transformer and a standby distribution transformer in a target area are determined, a switching strategy of the heavy overload distribution transformer is formulated, a strategy target value for evaluating the switching strategy is established, different switching strategies are arranged and combined to obtain a switching strategy group comprising different sequencing switching strategies, the heavy overload distribution transformer is simulated and switched according to the switching strategy group, strategy target values corresponding to the different sequencing switching strategies are calculated, the optimal sequencing of the switching strategies is determined according to the strategy target value, and the optimal sequencing is determined as the optimal decision scheme for switching the heavy overload distribution transformer. The technical scheme of the invention solves the problems that the efficiency of manually formulating a distribution transformer exchange strategy is low, the optimal allocation of resources cannot be realized, and the safe and stable operation of power equipment is influenced. The scheme determines the optimal strategy sequence for exchanging the heavy overload distribution transformer according to the strategy target value so as to ensure the optimization of the exchange strategy, and achieves the aspects of solving the heavy overload distribution transformer, improving the utilization rate of the standby exchange distribution transformer, improving the comprehensive power failure index of a target area and improving the work efficiency for exchanging the distribution transformer, so that the exchange of the heavy overload distribution transformer is realized by the optimized decision scheme.

Drawings

Fig. 1 is a schematic flow chart of a distribution transformer exchange decision method according to an embodiment of the present invention;

fig. 2 is a schematic flow chart illustrating a replacement strategy of a heavy-overload distribution transformer according to an embodiment of the present invention;

fig. 3 is a schematic flow chart of another replacement strategy for heavy-duty distribution transformers according to an embodiment of the present invention;

fig. 4 is a schematic flow chart of another replacement strategy for heavy-duty distribution transformers according to an embodiment of the present invention;

fig. 5 is a schematic flow chart of another replacement strategy for heavy-duty distribution transformers according to an embodiment of the present invention;

fig. 6 is a schematic flow chart of another replacement strategy for heavy-duty distribution transformers according to an embodiment of the present invention;

fig. 7 is a schematic flow chart illustrating another replacement strategy for heavy-duty distribution transformers according to an embodiment of the present invention;

fig. 8 is a schematic flow chart illustrating another method for decision-making for exchanging a distribution transformer according to an embodiment of the present invention;

fig. 9 is a schematic flow chart of another distribution transformer replacement decision method according to an embodiment of the present invention;

fig. 10 is a schematic structural diagram of a distribution transformer exchange decision device according to an embodiment of the present invention;

fig. 11 is a schematic structural diagram of a terminal according to an embodiment of the present invention.

Detailed Description

The present invention will be described in further detail with reference to the accompanying drawings and examples. It is to be understood that the specific embodiments described herein are merely illustrative of the invention and are not limiting of the invention. It should be further noted that, for the convenience of description, only some of the structures related to the present invention are shown in the drawings, not all of the structures.

Example one

Fig. 1 is a schematic flow chart of a distribution transformer replacement decision method according to an embodiment of the present invention, which may be applied to a situation where an optimal decision scheme for replacing a heavily overloaded distribution transformer is determined, where the method may be executed by a distribution transformer replacement decision apparatus, and the apparatus may be implemented in software and/or hardware, and the apparatus may be configured in an electronic device, such as a server or a terminal device, where a typical terminal device includes a mobile terminal, specifically includes a mobile phone, a computer, or a tablet computer. As shown in fig. 1, the method may specifically include:

and S110, determining a heavy overload distribution transformer and a standby distribution transformer of the target area.

Specifically, the target area is a power supply area where the exchange work of the distribution transformer is to be performed, the heavy overload distribution transformer of the target area is distribution transformer equipment to be exchanged in the predicted power supply area, the standby exchange distribution transformer is equipment for replacing the distribution transformer to be exchanged, and the heavy overload distribution transformer is exchanged through the standby exchange distribution transformer when the exchange work of the distribution transformer is performed.

Illustratively, a heavily overloaded distribution transformer is one that has a load factor greater than or equal to a first load factor. The load rate eta of the distribution transformer is determined according to the ratio of the maximum load of the power supply area of the distribution transformer and the product of the rated capacity and the power factor of the distribution transformer. For example, when the first load factor is set to 80%, if the load factor η of the distribution transformer is greater than or equal to 80%, the distribution transformer is a heavily overloaded distribution transformer.

Optionally, the standby distribution transformer at least includes an inventory distribution transformer and a light-load distribution transformer, where the inventory distribution transformer is an unused distribution transformer in the inventory, and the light-load distribution transformer is a distribution transformer with a load rate less than or equal to a second load rate. For example, when the second load factor is set to 20%, if the load factor η of the distribution transformer is less than or equal to 20%, the distribution transformer is a light-load distribution transformer. Optionally, when the inventory distribution transformer and the light-load distribution transformer cannot meet the exchange requirement of the heavy-load distribution transformer, the standby exchange distribution transformer may also include other distribution transformers determined according to the exchange strategy established manually.

In one embodiment of the present invention, determining heavy overload distribution transformers and standby distribution transformers for a target area comprises: acquiring distribution transformer data of a target area, wherein the distribution transformer data comprises the name, the capacity, the model and the maximum load of a distribution transformer; obtaining heavy overload distribution transformer data and light overload distribution transformer data according to the distribution transformer data; inventory distribution transformer data is obtained, wherein the inventory distribution transformer data includes a name, a capacity, and a model of a distribution transformer.

Illustratively, taking the example of standby distribution transformers including inventory distribution transformers and light duty distribution transformers, distribution transformer data for a target area may be obtained by a voltage monitoring system, which may include the name, rated capacity, model, and maximum load for a certain period of time of the distribution transformer. The type of the distribution transformer can be determined according to the name and model of the distribution transformer, for example, the distribution transformer is determined to be a dry type transformer or an oil-immersed type transformer. And determining the load rate of the distribution transformer according to the rated capacity and the maximum load of the distribution transformer, and comparing the load rate of the distribution transformer with the first load rate and the second load rate to determine that the distribution transformer is heavily overloaded distribution transformer data or lightly loaded distribution transformer data. The data source of the inventory distribution transformer is a material management system of the power system, and the name, rated capacity, model and other data of the inventory distribution transformer can be acquired through the material management system.

And S120, establishing a replacement strategy of the heavy overload distribution transformer.

Wherein, the strategy of exchanging comprises exchanging the heavy overload distribution transformer and exchanging between the heavy overload distribution transformers through the standby distribution transformer. Specifically, the heavily overloaded distribution transformer is replaced by the backup distribution transformer, that is, the distribution transformer in the set of the backup distribution transformer satisfying the replacement condition is replaced by the distribution transformer satisfying the replacement condition, so that the load rate of the distribution transformer in the set of the replaced heavily overloaded distribution transformer is less than the first load rate, for example, the load rate of the replaced distribution transformer is less than 80%. The heavy overload distribution transformers are interchanged, that is, in a set formed by the heavy overload distribution transformers in the target area, the heavy overload distribution transformer in one power supply area is exchanged to another power supply area, and each heavy overload distribution transformer is sequentially alternated, so that the load rate of the distribution transformer in the alternated heavy overload distribution transformer set is smaller than a first load rate, for example, the load rate of the alternated distribution transformer is smaller than 80%.

Illustratively, when the replacement distribution transformer includes an inventory distribution transformer, a light duty distribution transformer, and other manually specified distribution transformers, replacing the heavy duty distribution transformer with the replacement distribution transformer includes: heavy overload distribution transformers are exchanged through inventory distribution transformers, heavy overload distribution transformers are exchanged through light load distribution transformers, and heavy overload distribution transformers are solved in a standing manner. The heavy overload distribution transformers are exchanged through the inventory distribution transformers, namely the distribution transformers in the set formed by the inventory distribution transformers are exchanged through the distribution transformers in the set formed by the inventory distribution transformers, so that the load rate of the distribution transformers in the exchanged heavy overload distribution transformer set is smaller than the first load rate. And replacing the heavy overload distribution transformer by the light load distribution transformer, namely, mutually alternating the distribution transformer in the set consisting of the light load distribution transformer and the distribution transformer in the set consisting of the heavy overload distribution transformer, so that the load rate of the distribution transformer in the alternated heavy overload distribution transformer set is smaller than the first load rate. The method solves the problem of heavy overload distribution transformer, when the inventory distribution transformer and the light load distribution transformer can not meet the replacement requirement of the heavy overload distribution transformer, other distribution transformers determined according to the manually established replacement strategy replace the distribution transformer in the set formed by the heavy overload distribution transformer, so that the load rate of the distribution transformer in the replaced heavy overload distribution transformer set is less than the first load rate.

S130, establishing a strategy target value for evaluating the exchange strategy.

The strategy target values comprise the exchange frequency, the exchange completion rate, the power-off rate of the exchange of the distribution transformer and the utilization rate of the standby exchange distribution transformer. For example, the exchange frequency may be a ratio of the exchange times of the heavily overloaded distribution transformers to the total number of the heavily overloaded distribution transformers, the exchange completion rate may be a ratio of the total number of the exchanged distribution transformers to the total number of the heavily overloaded distribution transformers, the distribution transformer exchange outage rate represents a probability that the exchange of the distribution transformers will cause a power failure accident, and the backup distribution transformation utilization rate may be a ratio of the total number of the backup distribution transformers that have replaced the heavily overloaded distribution transformers to the total number of the heavily overloaded distribution transformers, for example, the backup distribution transformation utilization rate is a ratio of the total number of the lightly overloaded distribution transformers that have replaced the heavily overloaded distribution transformers to the total number of the heavily overloaded distribution transformers. After the exchange frequency, the exchange completion rate, the distribution transformer exchange outage rate and the standby distribution transformation utilization rate are determined, the weights of the exchange frequency, the exchange completion rate, the distribution transformer exchange outage rate and the standby distribution transformation utilization rate can be determined according to the average value of the exchange frequency, the exchange completion rate, the distribution transformer exchange outage rate and the standby distribution transformation utilization rate or the parameters with the emphasis on the exchange target, and the final strategy target value is obtained through weighting calculation. The larger the policy target value, the higher the evaluation of the corresponding swap policy.

And S140, arranging and combining the different exchange strategies to obtain an exchange strategy group comprising the exchange strategies in different sequences, and simulating and exchanging the overload distribution transformer according to the exchange strategy group.

Illustratively, when the exchange strategies comprise a strategy A, a strategy B, a strategy C and a strategy D, the strategy A-D is subjected to permutation and combination to obtain exchange strategies in different sequences, for example, the exchange strategies in different sequences such as A-B-C-D, A-C-B-D, B-C-A-D and the like are obtained by traversing each permutation and combination, each permutation and combination is formed into an exchange strategy group, and the heavy overload distribution transformer is simulated and exchanged according to each exchange strategy group. For example, when the sequence of the exchange strategy group is a-B-C-D, the strategy a is used to exchange the exchangeable distribution transformer in the combination of the heavy overload distribution transformers, the remaining heavy overload distribution transformers that cannot be exchanged are continuously exchanged by the strategy B, the remaining heavy overload distribution transformers that cannot be exchanged are continuously exchanged by the strategy C, and the remaining heavy overload distribution transformers that cannot be exchanged are continuously exchanged by the strategy C, that is, each exchange strategy is sequentially used to exchange the heavy overload distribution transformers according to the sequence of the exchange strategy group.

S150, calculating strategy target values corresponding to the exchange strategy groups with different sequences, determining the optimal sequence of the exchange strategies according to the strategy target values, and determining the optimal sequence as the optimal decision scheme for exchanging the heavy overload distribution transformer.

Illustratively, after each exchange strategy group is adopted to simulate exchange of the heavy overload distribution transformer, strategy target values corresponding to the exchange strategy groups are calculated, and the larger the strategy target values are, the higher the comprehensive evaluation of the exchange strategies is. And sequencing the strategy target values corresponding to each exchange strategy group from large to small according to the numerical values, wherein the exchange strategy group corresponding to the strategy target value in the first sequence is the optimal exchange strategy group, the exchange strategy sequence of the optimal exchange strategy group is the optimal sequence of the exchange strategies, and the exchange strategy group formed by the optimal sequence forms the optimal exchange strategy, namely the optimal decision scheme, of the heavy overload distribution transformer.

The technical scheme of the embodiment includes that a heavy overload distribution transformer and a standby distribution transformer in a target area are determined, a replacement strategy of the heavy overload distribution transformer is formulated, a strategy target value for evaluating the replacement strategy is established, different replacement strategies are arranged and combined to obtain a replacement strategy group comprising replacement strategies in different sequences, the heavy overload distribution transformer is simulated and replaced according to the replacement strategy group, strategy target values corresponding to the replacement strategies in different sequences are calculated, the optimal sequence of the replacement strategies is determined according to the strategy target value, and the optimal sequence is determined as an optimal decision scheme for replacing the heavy overload distribution transformer. And determining the optimal strategy sequence for exchanging the heavy overload distribution transformer according to the strategy target value so as to ensure the optimization of the exchange strategy, and achieving the aspects of solving the heavy overload distribution transformer, improving the utilization rate of the standby exchange distribution transformer, improving the comprehensive power failure index of a target area and improving the working efficiency of exchanging the distribution transformer so as to realize the exchange of the heavy overload distribution transformer by an optimized decision scheme.

Example two

In the present embodiment, on the basis of the above-described embodiment, the determination method for evaluating the policy target value of the swap policy in the above-described embodiment is further optimized.

Illustratively, a policy target value evaluating the swap policy is established according to the swap policy target. Alternatively, the exchange strategy may be an emergency measure proposed for solving the problem of heavy overload operation of the distribution transformer in the period of time of summer, holiday or power conservation, for example, the exchange strategy is applied to exchange the heavy overload distribution transformer of the target area during the spring festival, generally from 12 months to two weeks (about one and a half months) before the spring festival of the second year. The exchange strategy objectives for heavy duty distribution transformer exchanges during the time period described above may include:

(1) exchanging all predicted heavily-overloaded distribution transformers in the target area, so that the load rate of the exchanged heavily-overloaded distribution transformers is smaller than a first load rate, for example, the load rate of the alternated distribution transformers is smaller than 80%; (2) the predicted replacement of the heavily overloaded distribution transformer is completed in a short time to the maximum extent; (3) considering the comprehensive power failure index, finishing with the minimum power failure times and the exchange times (calculating as power failure 1 time and exchange 1 time by replacing one distribution transformer); (4) when the light-load distribution transformer is used for replacing the heavy-load distribution transformer, the load rate of the replaced light-load distribution transformer is greater than or equal to the second load rate and smaller than the first load rate, for example, the load rate of the replaced light-load distribution transformer is greater than or equal to 20% and less than 80%.

Illustratively, the policy target value is represented as:

wherein Y is a strategy target value, f is a conversion frequency, R is a conversion completion rate, S is a distribution transformer conversion outage rate, and T is a standby conversion distribution transformer utilization rate. The larger the policy target value Y, the higher the evaluation of the corresponding replacement policy.

Wherein, the switching frequency f can be expressed as:

wherein, card (N)_{Next time}) For the number of exchanges of heavily overloaded distribution transformers, card (N) is the total number of heavily overloaded distribution transformers. In order to meet the requirements of the target (1) and the target (3) in the above exchange strategy target, the exchange of the heavy overload distribution transformer is completed by the minimum power failure times and exchange times, and all the heavy overload distribution transformers in the target area are exchanged, wherein f can be made to be 1, that is, each heavy overload distribution transformer is exchanged once by adopting the exchange strategy, and all the heavy overload distribution transformers are exchanged.

The swap completion rate R can be expressed as:

wherein, card (N)_ABC) Heavy overload power distribution transformer exchanged by strategy A, strategy B and strategy CThe total number of the transformers, the strategy A is an exchange strategy for exchanging heavy-overload distribution transformers, the strategy B is an exchange strategy for exchanging heavy-overload distribution transformers through inventory distribution transformers, and the strategy C is an exchange strategy for exchanging heavy-overload distribution transformers through light-load distribution transformers. Considering the requirement of the objective (2) in the above exchange strategy objectives, the larger the value of the exchange completion rate R is, the more optimized the exchange strategy is, and since the exchange time of the exchange strategy (the D strategy) for solving the heavy overload distribution transformer is the slowest, the number of heavy overload distribution transformer exchanges should be maximally included in the exchanges of the a strategy, the B strategy and the C strategy.

For convenience of description, in this embodiment and the following embodiments, the policy a represents a replacement policy for exchanging heavy-duty distribution transformers, the policy B represents a replacement policy for replacing heavy-duty distribution transformers by inventory distribution transformers, the policy C represents a replacement policy for replacing heavy-duty distribution transformers by light-duty distribution transformers, and the policy D represents a replacement policy for solving heavy-duty distribution transformers.

The distribution transformer transfer outage rate S can be expressed as:

wherein, card (O)_{Has exchanged}) When the heavy overload distribution transformer is exchanged through the light load distribution transformer, the total number of the exchanged light load distribution transformer is calculated. When the strategy A is adopted to the strategy D for exchanging the distribution transformer, each heavy overload distribution transformer needs to be exchanged once, each heavy overload distribution transformer can be exchanged to be powered off, when the heavy overload distribution transformer is exchanged through the light load distribution transformer, the area where the light load distribution transformer is located can be powered off, and therefore the total power off frequency is the sum of the total number of the heavy overload distribution transformers and the total number of the exchanged light load distribution transformers. When heavily transshipping distribution transformer is exchanged through light-load distribution transformer, the area where light-load distribution transformer is located can be powered off, when heavily transshipping distribution transformer is exchanged through inventory distribution transformer or heavily transshipping distribution transformer, other power failure accidents can not be caused except that heavily transshipping distribution transformer is in the area power off, therefore adopt above-mentioned expression to calculate distribution transformer and exchangeAnd (5) stopping the power supply. Considering that the influence of the power outage of the distribution substation switching is large, the weight value of (1-S) is exemplarily set to 2 in the expression of the policy target value. The larger (1-S) is, the more optimized the representative switching strategy is, the more satisfying the minimum blackout frequency requirement of the target (3) among the switching strategy targets.

The light load distribution variable utilization rate T can be expressed as:

wherein, card (o) is the total number of the light-load distribution transformers, after the heavy-load distribution transformers and the light-load distribution transformers are exchanged, the light-load side belongs to capacity reduction, the heavy-load side belongs to capacity increase, and the load rate of the light-load distribution transformers after exchange can be close to the range of 20% -80%, which is equivalent to that the utilization rate of the distribution transformers is improved, so that the greater the value of the utilization rate T of the light-load distribution transformers, the more the requirement of the target (4) in the exchange strategy target can be met.

The embodiment of the invention provides a method for determining a strategy target value for evaluating a replacement strategy, which is used for establishing the strategy target value for evaluating the replacement strategy according to a replacement strategy target so as to ensure that the replacement strategy is optimized, and achieving the aims of solving the problems of heavy overload distribution transformers, improving the utilization rate of light load distribution transformers, improving the comprehensive power failure index of a target area and improving the work efficiency of replacement of the distribution transformers and realizing replacement of the heavy overload distribution transformers by an optimized decision scheme.

EXAMPLE III

Fig. 2 is a schematic flow chart of a switching strategy for heavy-overload distribution transformers according to an embodiment of the present invention, specifically, a schematic flow chart of a switching strategy for interchange between heavy-overload distribution transformers. On the basis of the above embodiments, the present embodiment further optimizes the method for interchange between heavily overloaded distribution transformers in the above embodiments. Correspondingly, as shown in fig. 2, the method of the present embodiment specifically includes:

s210, sorting the heavy overload distribution transformers according to the capacity and the load rate of the distribution transformers.

Illustratively, by using a "data comparison and sorting method", the heavily-overloaded distribution transformers predicted in the target area are sorted from large to small according to rated capacity, and sorted according to a priority of a higher load rate if the rated capacities are the same, and if the set of heavily-overloaded distribution transformers N includes { N1, N2, N3, N4,..... }, the sorted sequence may be represented as: n1 > N2 > N3 > N4.

S220, judging whether the heavy overload distribution transformer sorted first can be exchanged with the heavy overload distribution transformer sorted second.

If the first heavily overloaded distribution transformer can be replaced by the second heavily overloaded distribution transformer, go to step S230; if the first heavily overloaded distribution transformer cannot be exchanged with the second heavily overloaded distribution transformer, step S240 is executed.

Illustratively, the rotation between distribution transformers is simulated by a step method according to the sorted set of heavily-overloaded distribution transformers N, and according to the sorting, the first heavily-overloaded distribution transformer in the preset sorting is replaced by the strategy B, the strategy C or the strategy D, and then the replaced distribution transformer is vacated. If X is the vacated distribution transformer and X is N1, it is determined whether X can replace the second heavily overloaded distribution transformer N2.

Optionally, whether the heavy overload distribution transformer can be replaced by the distribution transformer is judged according to whether the types of the distribution transformer and the heavy overload distribution transformer are the same, and whether the corresponding load rate is less than a preset load rate when the heavy overload distribution transformer is simulated and replaced by the distribution transformer. For example, when determining whether N1 can replace N2, if the types of the distribution transformers of N1 and N2 are the same, that is, both are dry-wet transformers or both are oil-immersed transformers, and after N1 is adopted to simulate exchanging N2, the load rate of the station area where N1 corresponds to N2 is less than the preset load rate, for example, less than 80%, then N1 can replace N2. The load rate where N1 corresponds to the cell in which N2 is located can be calculated as the ratio of the maximum load of the cell in which N2 is located to the product of the rated capacity and power factor of N1. If the types of the distribution transformers N1 and N2 are different, or if the types of the distribution transformers N1 and N2 are the same, after N2 is simulated and exchanged by N1, the load rate of the station area where N1 is located corresponding to N2 is greater than or equal to a preset load rate, for example, greater than or equal to 80%, then N1 cannot replace N2.

And S230, replacing the second heavily overloaded distribution transformer by adopting the first heavily overloaded distribution transformer, and continuously judging whether the second heavily overloaded distribution transformer can replace the third heavily overloaded distribution transformer.

For example, if N1 can switch N2, N1 is used to switch N2 to ensure that the load rate of the heavily overloaded station after switching the distribution transformer is less than the preset load rate, so that the station can no longer operate heavily overloaded. After exchanging N2 with N1, N2 is the vacated distribution transformer, and when X is N2, it is continuously determined whether X can replace the third heavily overloaded distribution transformer N2.

And S240, transferring the second-ranked heavy overload distribution transformer into a distribution transformer set which cannot be exchanged, and continuously judging whether the first-ranked heavy overload distribution transformer can exchange the third-ranked heavy overload distribution transformer or not.

Illustratively, if N1 is not swappable N2, then N2 is not swappable, N2 is shifted to the swappable set Z, and a determination is continued whether N1 can swap N3.

And S250, replacing the heavy overload distribution transformers one by one, transferring the last replaced heavy overload distribution transformer to the stock, and outputting and sequencing the distribution transformer sets which cannot be replaced.

Illustratively, the heavily overloaded distribution transformers are exchanged one by one in the manner that the heavily overloaded distribution transformer at the top is sorted each time whether the currently vacated distribution transformer X can be exchanged in the set of the heavily overloaded distribution transformers N. If the currently vacated distribution transformer X can exchange the heavily overloaded distribution transformer sequenced at the head, the currently vacated distribution transformer X is adopted to exchange the heavily overloaded distribution transformer sequenced at the head so as to ensure that the load rate of the transformer area corresponding to the heavily overloaded distribution transformer sequenced at the head is smaller than the preset load rate, and the transformer area is prevented from continuously running in heavy overload. After the currently vacated distribution transformer X is adopted to replace the heavily overloaded distribution transformer sequenced at the head, the heavily overloaded distribution transformer sequenced at the head becomes the currently vacated distribution transformer X, the heavily overloaded distribution transformer sequenced at the next head becomes the heavily overloaded distribution transformer currently sequenced at the head, and whether the currently vacated distribution transformer X can replace the heavily overloaded distribution transformer N in the set or not is continuously judged, and the heavily overloaded distribution transformer sequenced at the head is sequenced. If the currently vacated distribution transformer X can not exchange the heavy overload distribution transformer sequenced at the head, the heavy overload distribution transformer sequenced at the head is transferred into a distribution transformer set Z which can not be exchanged, the heavy overload distribution transformer sequenced at the next head becomes the heavy overload distribution transformer sequenced at the head at present, whether the currently vacated distribution transformer X can exchange the heavy overload distribution transformer N in the set or not is continuously judged, and the heavy overload distribution transformer sequenced at the head is sequenced. The heavy overload transformers are exchanged one by one in the above manner, and all the heavy overload transformers in the set of heavy overload distribution transformers N are sequentially exchanged. And (3) in the collection of the heavy overload distribution transformers N, the last replaced heavy overload distribution transformer is vacated, the distribution transformer is transferred to the stock, all distribution transformers in the distribution transformer collection Z which cannot be replaced are output, and the heavy overload distribution transformers in the distribution transformer collection Z which cannot be replaced are sequenced. During sorting, sorting is still performed according to the capacity and the load rate of the heavy overload distribution transformer, namely sorting is performed from large to small according to the rated capacity, and if the rated capacity is the same, sorting is performed according to the priority of higher load rate, so that the heavy overload distribution transformer in the distribution transformer set Z which cannot be exchanged is continuously exchanged by applying the next exchange strategy.

According to the technical scheme, the rotation among the heavily overloaded distribution transformers is simulated by a step method, the heavily overloaded distribution transformers are firstly sequenced, then the rotated heavily overloaded distribution transformers are simulated one by one in a step-type manner according to the sequencing, and whether the two distribution transformers are of the same type or not and whether the load rate of the heavily overloaded distribution transformer area is smaller than the preset load rate after the replacement or not is judged. The method realizes the replacement of the distribution transformer with medium capacity by the distribution transformer with large capacity and the replacement of the distribution transformer with small capacity by the distribution transformer with medium capacity until all the heavy overload distribution transformers are simulated and rotated, finally vacates a replaced distribution transformer to be transferred into inventory, outputs a distribution transformer set which cannot be replaced, and sorts the heavy overload distribution transformers in the set so as to apply the next replacement strategy to continue replacement.

Specific examples

Fig. 3 is a schematic flow chart of another switching strategy for heavy-overload distribution transformers according to an embodiment of the present invention, specifically a schematic flow chart of a switching strategy for interchange between heavy-overload distribution transformers. This example provides a specific example of a switching strategy for interchange between heavily overloaded distribution transformers, based on the above-described embodiments. Correspondingly, as shown in fig. 3, the method of the present embodiment specifically includes:

s311, sorting distribution transformers in the heavy overload distribution transformer set to obtain N e { N1, N2, N3, N4, ·.

S312, assume that N1 has been replaced by the B policy, C policy, or D policy and is vacated, so that the vacated distribution transformation X is N1.

S313, judging whether X can replace N2.

If X can replace N2, go to step S314; if X can not replace N2, go to step S315;

s314, replacing N2 with X, so that the vacated match X is N2.

S315, transfer N2 to the irreplaceable distribution set Z, and the vacated distribution is still X — N1.

S316, judging whether X can replace N3.

If X can replace N3, go to step S317; if X cannot replace N3, go to step S318;

s317, replace N3 with X, so that the vacated match X is N3.

S318, transfer N3 to the irreplaceable distribution set Z, and change the vacated distribution to X — N1 or N2.

And S319, sequentially judging whether X can replace the residual distribution transformer in the heavily overloaded distribution transformer set or not according to the above formula.

And S320, outputting the finally vacated distribution transformation X and transferring the distribution transformation X into the stock.

S321, outputting and sorting the transformation set Z which can not be exchanged.

Example four

Fig. 4 is a schematic flow chart of another replacement strategy for a heavily overloaded distribution transformer according to an embodiment of the present invention, which may be specifically a schematic flow chart of a replacement strategy for replacing a heavily overloaded distribution transformer by an inventory distribution transformer. On the basis of the above embodiments, the present embodiment further optimizes the method for exchanging the heavy overload distribution transformer through the inventory distribution transformer. Correspondingly, as shown in fig. 4, the method of the present embodiment specifically includes:

and S410, respectively sequencing the heavy overload distribution transformer and the inventory distribution transformer according to the capacity and the load rate of the distribution transformer.

Illustratively, by using a "data comparison and sorting method", the heavily-overloaded distribution transformers predicted in the target area are sorted from large to small according to rated capacity, and sorted according to a priority of a higher load rate if the rated capacities are the same, and if the set of heavily-overloaded distribution transformers N includes { N1, N2, N3, N4,..... }, the sorted sequence may be represented as: n1 > N2 > N3 > N4. The inventory distribution transformers are sorted from small rated capacity to large rated capacity, if the rated capacities are the same, the inventory distribution transformers are sorted according to the priority of lower load rate, and if the set of the inventory distribution transformers M comprises { M1, M2, M3, M4, ·. M1 > M2 > M3 > M4..

And S420, judging whether the first heavily overloaded distribution transformer can be exchanged according to the sequence of the inventory distribution transformers one by one.

If the first heavily overloaded distribution transformer can be exchanged by the inventory distribution transformers, then S430 is executed; if the inventory distribution transformer is not exchangeable for the heavy overload distribution transformer of the first rank, S440 is performed.

Illustratively, according to the sorted set of the on-board distribution transformers M and the set of the heavily-overloaded distribution transformers N, it is determined one by one whether each distribution transformer in the sorted set of the on-board distribution transformers M can be exchanged for the heavily-overloaded distribution transformer that is the first heavy-overloaded distribution transformer in the sorted set of the heavily-overloaded distribution transformers N, that is, when N is N1, it is determined one by one whether N1 can be exchanged for M1, M2, M3, M4. Specifically, it is first determined whether M1 can swap N1, if M1 can swap N1, the next step is continued, if M1 cannot swap N1, it is determined whether M2 can swap N1, and it is determined whether each distribution transformer in the set of on-board distribution transformers M can swap N1 one by one, until a certain distribution transformer in the set of on-board distribution transformers M is stocked swappable N1, or when all distribution transformers in the set are traversed and N1 cannot be swapped, the next step is executed.

Optionally, whether the heavy-duty distribution transformer can be replaced by the inventory-based distribution transformer is judged according to whether the types of the inventory-based distribution transformer and the heavy-duty distribution transformer are the same, and whether the load rate corresponding to the inventory-based distribution transformer simulation replacement of the heavy-duty distribution transformer is smaller than a preset load rate. For example, when determining whether M1 can replace N1, if the types of the distribution transformers M1 and N1 are the same, that is, both are dry-wet transformers or both are oil-immersed transformers, and after performing simulation exchange of N1 by using M1, the load rate of the station area where M1 corresponds to N1 is less than the preset load rate, for example, less than 80%, then M1 can replace N1. The load rate where M1 corresponds to the cell in which N1 is located can be calculated as the ratio of the maximum load of the cell in which N1 is located to the product of the rated capacity and power factor of M1. If the types of the distribution transformers M1 and N1 are different, or even if the types of the distribution transformers M1 and N1 are the same, after N1 is exchanged in an M1 simulation mode, the load rate of the station area where M1 corresponds to N1 is greater than or equal to a preset load rate, for example, greater than or equal to 80%, then N1 cannot be replaced by M1.

And S430, replacing the first heavily overloaded distribution transformer in the sequence by using the inventory distribution transformer, transferring the first heavily overloaded distribution transformer in the sequence into the inventory, and updating the sequence of the inventory distribution transformer.

Illustratively, if any inventory distribution transformer M in M1, M2, M3, M4, the. After exchanging N1 with the inventory distribution transformer M, N1 is transferred to the collection of inventory distribution transformers M and the distribution transformers in the collection of inventory distribution transformers M are reordered.

S440, the heavy overload distribution transformers in the first sequence are transferred into a distribution transformer set which cannot be exchanged, and whether the heavy overload distribution transformers in the second sequence can be exchanged or not is continuously judged one by one according to the sequence of the inventory distribution transformers.

For example, if N1 cannot be exchanged for all inventory distribution transformers M in M1, M2, M3, M4,.. said.. then N1 is transferred to a distribution set Z that cannot be exchanged without exchanging N1, and referring to the manner of step S420, when N is N2, it is determined whether M1, M2, M3, M4,.. said.. can be exchanged for N2 one by one.

S450, replacing overload distribution transformers one by one, outputting distribution transformer sets which cannot be replaced, and sequencing.

Illustratively, the heavy overload transformers are exchanged one by one through the inventory distribution transformers in the manner that whether each inventory distribution transformer can exchange the heavy overload distribution transformer N in the collection of the heavy overload distribution transformers N is judged one by one according to the sorting of the collection of the inventory distribution transformers M each time, and the heavy overload distribution transformers at the head are sorted. If any distribution transformer in the collection of the inventory distribution transformers M can be changed to be the heavy overload distribution transformer, the replacement is carried out so that the load rate of the transformer area corresponding to the heavy overload distribution transformer sequenced at the head is smaller than the preset load rate, and the transformer area is prevented from continuously operating in heavy overload. The exchanged heavy overload distribution transformers are transferred to a collection of inventory distribution transformers M and the distribution transformers in the collection of inventory distribution transformers M are reordered. And after the replacement, continuously judging whether each inventory distribution transformer can replace the heavily overloaded distribution transformer which is sequenced at the next position. If all distribution transformers in the inventory distribution transformer M set can not exchange the heavy overload distribution transformer, the heavy overload distribution transformer is transferred into a distribution transformer set Z which can not be exchanged, and whether the heavy overload distribution transformer which is sequenced at the next position can be exchanged or not is continuously judged. Heavy overload transformers are exchanged one by one through the inventory distribution transformers as above, and all heavy overload transformers in the set of heavy overload distribution transformers N are sequentially alternated. Outputting all distribution transformers in the distribution and transformation set Z which cannot be exchanged, and sequencing the heavy overload distribution transformers in the distribution and transformation set Z which cannot be exchanged so as to apply the next exchange strategy to continuously exchange the heavy overload distribution transformers in the distribution and transformation set Z which cannot be exchanged.

According to the technical scheme, the step method is used for simulating the alternation between the heavy overload distribution transformer and the inventory distribution transformer, the heavy overload distribution transformer and the inventory distribution transformer are firstly sequenced respectively, then the alternation of the heavy overload distribution transformer is simulated one by one step according to the sequencing of the heavy overload distribution transformer and the inventory distribution transformer, whether the two distribution transformers are of the same type or not is judged, and whether the load rate of the station area of the heavy overload distribution transformer after the exchange is smaller than the preset load rate or not is judged to be exchangeable. And repeating the process until all distribution transformers in the heavy overload distribution transformer set are extracted one by one and are subjected to analog interchange, finally outputting the distribution transformer set which cannot be exchanged, and sequencing the heavy overload distribution transformers in the set so as to apply the next exchange strategy to continue exchanging.

Specific examples

Fig. 5 is a schematic flow chart of another replacement strategy for a heavily overloaded distribution transformer according to an embodiment of the present invention, which may be specifically a schematic flow chart of a replacement strategy for replacing a heavily overloaded distribution transformer by an inventory distribution transformer. This example provides a specific example of a replacement strategy for replacing a heavily overloaded distribution transformer by an inventory distribution transformer, based on the above-described embodiments. Correspondingly, as shown in fig. 5, the method of the present embodiment specifically includes:

s511, sorting distribution transformers in the heavy overload distribution transformer set to obtain N e { N1, N2, N3, N4,. the.

S512, sorting distribution transformers in the inventory-mounted distribution transformer set to obtain M e { M1, M2, M3, M4, ·.

And S513, judging whether each distribution transformer in the inventory-carried distribution transformer set can be interchanged with the N1 one by one.

If any distribution transformer in the set of on-board distribution transformers is interchangeable with N1, then S514 is performed; if all distribution transformers in the set of on-board distribution transformers are not interchangeable with N1, S515 is performed.

S514, swap N1 through the on-board inventory distribution transformer, transfer N1 into and reorder the set of inventory distribution transformers.

And S515, transferring the N1 into a distribution set Z which cannot be exchanged.

And S516, judging whether each distribution transformer in the inventory-carried distribution transformer set can be interchanged with the N2 one by one.

If any distribution transformer in the on-board distribution transformer set can be interchanged with N2, executing S517; if all distribution transformers in the set of on-board distribution transformers are not interchangeable with N2, S518 is performed.

S517, swap N2 through inventory on-board distribution transformer, transfer N2 into and reorder the set of inventory distribution transformers.

And S518, transferring the N2 into a distribution set Z which cannot be exchanged.

And S519, sequentially judging whether each distribution transformer in the inventory loading distribution transformer set can be interchanged with the rest heavy overload distribution transformers or not according to the above mode.

And S520, outputting and sorting the transformation set Z which cannot be exchanged.

EXAMPLE five

Fig. 6 is a schematic flow chart of another replacement strategy for a heavily overloaded distribution transformer according to an embodiment of the present invention, which may be specifically a schematic flow chart of a replacement strategy for replacing a heavily overloaded distribution transformer with a lightly loaded distribution transformer. On the basis of the above embodiments, the method for exchanging the heavy overload distribution transformer through the light load distribution transformer is further optimized. Correspondingly, as shown in fig. 6, the method of the present embodiment specifically includes:

and S610, respectively sequencing the heavy overload distribution transformer and the light load distribution transformer according to the capacity and the load rate of the distribution transformer.

Illustratively, by using a "data comparison and sorting method", the heavily-overloaded distribution transformers predicted in the target area are sorted from large to small according to rated capacity, and sorted according to a priority of a higher load rate if the rated capacities are the same, and if the set of heavily-overloaded distribution transformers N includes { N1, N2, N3, N4,..... }, the sorted sequence may be represented as: n1 > N2 > N3 > N4. Sorting the light-load distribution transformers according to rated capacity from small to large, if the rated capacity is the same, sorting the light-load distribution transformers according to priority of lower load rate, and if the set of the light-load distribution transformers O comprises { O1, O2, O3, O4,.. multidot. }, then sorting can be represented as: o1 > O2 > O3 > O4..

And S620, judging whether the light-load distribution transformers can be replaced by the first heavy-load distribution transformers in the sequence one by one according to the sequence of the light-load distribution transformers.

If the light-load distribution transformer can exchange the first heavy-load distribution transformer, executing S630; if the light-load distribution transformer cannot exchange the heavy-load distribution transformer with the first in the sequence, S640 is performed.

Illustratively, according to the sorted set of light-load distribution transformers O and the set of heavy-load distribution transformers N, each distribution transformer in the set of light-load distribution transformers O is judged one by one, and whether the heavy-load distribution transformer first sorted in the set of heavy-load distribution transformers N can be replaced, that is, when N is N1, O1, O2, O3, O4, and N1 can be replaced one by one. Specifically, it is first determined whether O1 can switch N1, if O1 can switch N1, the next step is continuously performed, if O1 cannot switch N1, it is determined whether O2 can switch N1, and it is determined whether each distribution transformer in the set of light-load distribution transformers O can switch N1 one by one, until a certain distribution transformer in the set of light-load distribution transformers O can switch N1, or when all distribution transformers in the set are traversed and all distribution transformers in the set cannot switch N1, the next step is performed.

Optionally, whether the light-load distribution transformer can be replaced with the heavy-overload distribution transformer is judged according to whether the types of the light-load distribution transformer and the heavy-overload distribution transformer are the same, and whether the load rate corresponding to the simulation replacement of the heavy-overload distribution transformer by the light-load distribution transformer is smaller than the preset load rate. For example, when determining whether O1 can replace N1, if the types of the distribution transformers of O1 and N1 are the same, that is, both are dry-wet transformers or both are oil-immersed transformers, and after performing analog exchange on N1 by using O1, the load rate of the station area where O1 corresponds to N1 is less than the preset load rate, for example, less than 80%, then O1 can replace N1. The load rate where O1 corresponds to the cell in which N1 is located can be calculated as the ratio of the maximum load of the cell in which N1 is located, to the product of the rated capacity and power factor of O1. If the type of the distribution transformer of O1 and N1 is different, or if the type of the distribution transformer of O1 and N1 is the same, but after N1 is exchanged in an O1 simulation, the load rate of the station area where O1 is located corresponding to N1 is greater than or equal to a preset load rate, for example, greater than or equal to 80%, then N1 cannot be replaced by O1.

And S630, interchanging the light-load distribution transformer with the heavy-load distribution transformer which is ranked first.

Illustratively, if any one of the light-load distribution transformers O in O1, O2, O3, O4. After the light-load distribution transformer O is adopted to replace the N1, the N1 also replaces the light-load distribution transformer O, the light-load distribution transformer O area is replaced by the N1 due to the fact that the load rate of the light-load distribution transformer O area is low, the light-load distribution transformer O cannot be affected, the light-load distribution transformer O is adopted to replace the N1, and the utilization rate of the light-load distribution transformer O is improved.

And S640, transferring the heavy overload distribution transformers in the first sequence into a distribution transformer set which cannot be exchanged, and continuously judging whether the light load distribution transformers can exchange the heavy overload distribution transformers in the second sequence one by one according to the sequence of the light load distribution transformers.

For example, if N1 cannot be exchanged for all of the light distribution transformers O in O1, O2, O3, O4,.. the light distribution transformers O cannot be exchanged, N1 is transferred to the distribution set Z that cannot be exchanged without exchanging N1, and with reference to step S620, if N is N2, it is determined whether N2 can be exchanged for O1, O2, O3, O4,.. the light distribution transformers O cannot be exchanged.

And S650, replacing the heavy-duty distribution transformer and the light-duty distribution transformer one by one, and outputting and sequencing the distribution transformer sets which cannot be replaced.

Illustratively, the heavy overload transformers are exchanged one by one through the light load distribution transformers in the manner as above, that is, whether each light load distribution transformer can exchange the heavy overload distribution transformer N in the collection of the heavy overload distribution transformers is judged one by one according to the sorting of the collection of the light load distribution transformers O each time, and the heavy overload distribution transformer at the head is sorted. And if any distribution transformer in the set of the light-load distribution transformers O can be used for exchanging the heavy-overload distribution transformers, exchanging the heavy-overload distribution transformers so that the load rate of the station area corresponding to the heavy-overload distribution transformer sequenced at the head is smaller than the preset load rate, and avoiding the continuous heavy-overload operation of the station area. And after the exchange, continuously judging whether each light-load distribution transformer can be matched with the heavy-load distribution transformer sequenced at the next position. If all distribution transformers in the set of the light-load distribution transformers O can not exchange the heavy-overload distribution transformers, the heavy-overload distribution transformers are transferred to a distribution transformer set Z which can not be exchanged, and whether the heavy-overload distribution transformers in the next order can be exchanged by each light-load distribution transformer or not is continuously judged. Heavy overload transformers are exchanged one by one through the light load distribution transformers as above, and all heavy overload transformers in the set of heavy overload distribution transformers N are sequentially alternated. Outputting all distribution transformers in the distribution and transformation set Z which cannot be exchanged, and sequencing the heavy overload distribution transformers in the distribution and transformation set Z which cannot be exchanged so as to apply the next exchange strategy to continuously exchange the heavy overload distribution transformers in the distribution and transformation set Z which cannot be exchanged.

According to the technical scheme, the alternation between the heavy overload distribution transformer and the light overload distribution transformer is simulated by a step method, the heavy overload distribution transformer and the light overload distribution transformer are firstly sequenced respectively, then the alternation of the heavy overload distribution transformer is simulated one by one in a step mode according to the sequencing of the heavy overload distribution transformer and the light overload distribution transformer, whether the two distribution transformers are of the same type or not is judged, and whether the load rate of a station area of the heavy overload distribution transformer is smaller than the preset load rate or not after the exchange is judged. And repeating the process until all distribution transformers in the heavy overload distribution transformer set are extracted one by one and are subjected to analog interchange, finally outputting the distribution transformer set which cannot be exchanged, and sequencing the heavy overload distribution transformers in the set so as to apply the next exchange strategy to continue exchanging.

Specific examples

Fig. 7 is a schematic flow chart of another replacement strategy for a heavily overloaded distribution transformer according to an embodiment of the present invention, which may be specifically a schematic flow chart of a replacement strategy for replacing a heavily overloaded distribution transformer with a lightly loaded distribution transformer. This example provides a specific example of the exchange strategy for exchanging a heavy-duty distribution transformer by a light-duty distribution transformer on the basis of the above-described embodiments. Correspondingly, as shown in fig. 7, the method of the present embodiment specifically includes:

s711, sorting distribution transformers in the heavy overload distribution transformer set to obtain N e { N1, N2, N3, N4,. the.

And S712, sorting distribution transformers in the light-load distribution transformer set to obtain O e { O1, O2, O3, O4,. the.

And S713, judging whether each distribution transformer in the light-load distribution transformer set can be interchanged with the N1 one by one.

If any distribution transformer in the light-load distribution transformer set can be interchanged with N1, executing S714; if all the distribution transformers in the light-load distribution transformer set cannot be interchanged with N1, S715 is performed.

And S714, exchanging the light-load distribution transformer with the N1.

And S715, transferring the N1 into a distribution set Z which cannot be exchanged.

And S716, judging whether each distribution transformer in the light-load distribution transformer set can be interchanged with the N2 one by one.

If any distribution transformer in the light-load distribution transformer set can be interchanged with N2, executing S717; if all the distribution transformers in the light-load distribution transformer set cannot be interchanged with N2, S718 is performed.

And S717, exchanging the light-load distribution transformer with N1.

And S718, transferring the N2 into a distribution set Z which cannot be exchanged.

And S719, sequentially judging whether each distribution transformer in the light-load distribution transformer set can be interchanged with the rest heavy-overload distribution transformers or not according to the above mode.

And S720, outputting and sorting the transformation set Z which cannot be exchanged.

EXAMPLE six

Fig. 8 is a schematic flow chart of another distribution transformer replacement decision method according to an embodiment of the present invention, which further optimizes the method for replacing a heavily overloaded distribution transformer based on the above embodiment. Correspondingly, as shown in fig. 8, the method of the present embodiment specifically includes:

and S810, determining a heavily overloaded distribution transformer and a standby distribution transformer of the target area.

And S820, establishing a replacement strategy of the heavy overload distribution transformer.

S830, establishing a strategy target value for evaluating the exchange strategy.

S840, exchanging among heavy overload distribution transformers, exchanging heavy overload distribution transformers through inventory distribution transformers, exchanging heavy overload distribution transformers through light overload distribution transformers, and standing to solve the problem of heavy overload distribution transformers to arrange and combine four exchange strategies so as to obtain exchange strategy groups with different sequencing exchange strategies.

Illustratively, four exchange strategies of exchanging heavy overload distribution transformers (strategy A), exchanging heavy overload distribution transformers through inventory distribution transformers (strategy B), exchanging heavy overload distribution transformers through light overload distribution transformers (strategy C) and solving heavy overload distribution transformers (strategy D) are arranged and combined, and the exchange time of the strategy D in the four exchange strategies is the slowest, so that the exchange of the heavy overload distribution transformers is maximally incorporated into the exchange of the strategy A, the strategy B and the strategy C, and the strategy D is placed in the last order in the arrangement and combination. According to the arrangement formula A3₃6, there are 6 orders of a-B-C-D, A-C-B-D, B-a-C-D, B-C-a-D, C-a-B-D, C-B-a-D. Each sort of exchange strategy forms an exchange strategy group, and the heavy overload distribution transformer is simulated and exchanged according to each exchange strategy group.

And S850, executing each sorted exchange strategy group to perform simulation exchange on the heavy overload distribution transformer.

Illustratively, when the sequence of the exchange strategy group is a-B-C-D, the strategy a is used to exchange the exchangeable distribution transformer in the combination of the heavy overload distribution transformers, the remaining heavy overload distribution transformers that cannot be exchanged are continuously exchanged by the strategy B, the remaining heavy overload distribution transformers that cannot be exchanged are continuously exchanged by the strategy C, and the remaining heavy overload distribution transformers that cannot be exchanged are continuously exchanged by the strategy C, that is, each exchange strategy is sequentially used to exchange the heavy overload distribution transformers according to the sequence of the exchange strategy group.

And S860, calculating strategy target values corresponding to the exchange strategy groups with different sequences, determining the optimal sequence of the exchange strategies according to the strategy target values, and determining the optimal sequence as the optimal decision scheme for exchanging the heavy overload distribution transformer.

In particular, the expression according to the policy target value Y

And respectively calculating strategy target values corresponding to the exchange strategy groups with different sequences, wherein the larger the strategy target value Y is, the higher the comprehensive evaluation of the exchange strategy is. And sequencing the strategy target values corresponding to each exchange strategy group from large to small according to the numerical values, wherein the exchange strategy group corresponding to the strategy target value in the first sequence is the optimal exchange strategy group, the exchange strategy sequence of the optimal exchange strategy group is the optimal sequence of the exchange strategies, and the exchange strategy group formed by the optimal sequence forms the optimal exchange strategy, namely the optimal decision scheme, of the heavy overload distribution transformer.

TABLE 1

Table 1 exemplarily provides a set of policy target values corresponding to different sorted exchange policy groups, and referring to table 1, when a distribution transformer exchange decision is made, the exchange policy groups are sorted according to the size of the policy target values, so as to obtain three schemes, namely a high scheme, a medium scheme and a low scheme. And synthesizing the optimal data, and selecting the conversion strategy group with the highest Y value and BACD sequencing as the optimal decision scheme. Optionally, if the decision is focused on the comprehensive blackout index, the switching strategy group ordered by the BCAD with a lower S value may be selected as the optimal decision scheme. Optionally, if the decision is made with a focus on the utilization rate of the light-load distribution transformer, the switching strategy group ordered by CBAD or CABD with a higher T value may be selected as the optimal decision scheme.

According to the technical scheme of the embodiment, the finally output optimal decision scheme content comprises A, B, C, D four well-ordered strategies, and the names, models, rated capacities, maximum loads, load rates, inventory change information, power failure times, utilization rate of light-load distribution transformers and other data of the distribution transformers before and after conversion under each strategy.

Specific examples

Fig. 9 is a schematic flow chart of another distribution transformer exchange decision method according to an embodiment of the present invention, and this example provides a specific example of a distribution transformer exchange decision method based on the above embodiment. Correspondingly, as shown in fig. 9, the method of the present embodiment specifically includes:

s910, sorting distribution transformers in the heavy overload distribution transformer set to obtain N e { N1, N2, N3, N4, ·.

S920, sorting distribution transformers in the inventory-loaded distribution transformer set to obtain M e { M1, M2, M3, M4, ·.

And S930, sorting distribution transformers in the light-load distribution transformer set to obtain O e { O1, O2, O3, O4,. the.

And S940, exchanging among heavy overload distribution transformers, exchanging heavy overload distribution transformers through inventory distribution transformers, exchanging heavy overload distribution transformers through light overload distribution transformers, and standing to solve the problem of heavy overload distribution transformers to arrange and combine the four exchange strategies to obtain an exchange strategy group comprising exchange strategies in different orders. And executing each exchange strategy group according to the sequence of each distribution and transformation set, and carrying out simulation exchange on the heavy overload distribution transformer.

S950, calculating strategy target values Y corresponding to different exchange strategy groups, sequencing the exchange strategy groups from large to small according to the strategy target values, and determining the exchange strategy group corresponding to the maximum strategy target value as an optimal decision scheme.

EXAMPLE seven

Fig. 10 is a schematic structural diagram of a distribution transformer replacement decision device according to an embodiment of the present invention, which is applicable to a case of determining an optimal decision scheme for replacing a heavily overloaded distribution transformer. The distribution transformer replacement decision device provided by the embodiment of the invention can execute the distribution transformer replacement decision method provided by any embodiment of the invention, and has corresponding functional modules and beneficial effects of the execution method.

As shown in fig. 10, the apparatus specifically includes: the system comprises a distribution transformer determination module 11, an exchange strategy making module 12, a strategy target value establishing module 13, a distribution transformer simulation exchange module 14 and an optimal decision scheme determination module 15, specifically:

the distribution transformer determining module 11 is configured to determine a heavily overloaded distribution transformer and a standby distribution transformer in a target area;

the exchange strategy making module 12 is used for making an exchange strategy of the heavy overload distribution transformer, wherein the exchange strategy comprises exchanging the heavy overload distribution transformer and exchanging the heavy overload distribution transformer through a standby exchange distribution transformer;

the strategy target value establishing module 13 is used for establishing a strategy target value for evaluating the exchange strategy, wherein the strategy target value comprises exchange frequency, exchange completion rate, distribution transformer exchange outage rate and standby exchange distribution transformer utilization rate;

the distribution transformer simulation exchanging module 14 is configured to perform permutation and combination on different exchanging strategies to obtain exchanging strategy groups including exchanging strategies in different orders, and simulate exchanging the heavy overload distribution transformer according to the exchanging strategy groups;

the optimal decision scheme determining module 15 is configured to calculate policy target values corresponding to the switching policies of different ranks, determine an optimal rank of the switching policies according to the policy target values, and determine the optimal rank as an optimal decision scheme for switching the heavy overload distribution transformer.

The distribution transformer replacement decision device provided by the embodiment of the invention can execute the distribution transformer replacement decision method provided by any embodiment of the invention, and has corresponding functional modules and beneficial effects of the execution method.

Example eight

Fig. 11 is a schematic structural diagram of a terminal according to an embodiment of the present invention. FIG. 11 illustrates a block diagram of an exemplary device 412 suitable for use in implementing embodiments of the present invention. The device 412 shown in fig. 11 is only an example and should not impose any limitation on the functionality or scope of use of embodiments of the present invention.

As shown in fig. 11, the device 412 is in the form of a general purpose device. The components of device 412 may include, but are not limited to: one or more processors 416, a storage device 428, and a bus 418 that couples the various system components including the storage device 428 and the processors 416.

Bus 418 represents one or more of any of several types of bus structures, including a memory device bus or memory device controller, a peripheral bus, an accelerated graphics port, and a processor or local bus using any of a variety of bus architectures. By way of example, such architectures include, but are not limited to, Industry Standard Architecture (ISA) bus, Micro Channel Architecture (MAC) bus, enhanced ISA bus, Video Electronics Standards Association (VESA) local bus, and Peripheral Component Interconnect (PCI) bus.

Device 412 typically includes a variety of computer system readable media. Such media can be any available media that is accessible by device 412 and includes both volatile and nonvolatile media, removable and non-removable media.

Storage 428 may include computer system readable media in the form of volatile Memory, such as Random Access Memory (RAM) 430 and/or cache Memory 432. The device 412 may further include other removable/non-removable, volatile/nonvolatile computer system storage media. By way of example only, storage system 434 may be used to read from and write to non-removable, nonvolatile magnetic media (not shown in FIG. 11, commonly referred to as a "hard drive"). Although not shown in FIG. 11, a magnetic disk drive for reading from and writing to a removable, nonvolatile magnetic disk (e.g., a "floppy disk") and an optical disk drive for reading from or writing to a removable, nonvolatile optical disk such as a Compact disk Read-Only Memory (CD-ROM), Digital Video disk Read-Only Memory (DVD-ROM) or other optical media may be provided. In these cases, each drive may be connected to bus 418 by one or more data media interfaces. Storage 428 may include at least one program product having a set (e.g., at least one) of program modules that are configured to carry out the functions of embodiments of the invention.

A program/utility 440 having a set (at least one) of program modules 442 may be stored, for instance, in storage 428, such program modules 442 including, but not limited to, an operating system, one or more application programs, other program modules, and program data, each of which examples or some combination thereof may comprise an implementation of a network environment. The program modules 442 generally perform the functions and/or methodologies of the described embodiments of the invention.

The device 412 may also communicate with one or more external devices 414 (e.g., keyboard, pointing terminal, display 424, etc.), with one or more terminals that enable a user to interact with the device 412, and/or with any terminals (e.g., network card, modem, etc.) that enable the device 412 to communicate with one or more other computing terminals. Such communication may occur via input/output (I/O) interfaces 422. Further, the device 412 may also communicate with one or more networks (e.g., a Local Area Network (LAN), Wide Area Network (WAN), and/or a public Network, such as the internet) via the Network adapter 420. As shown in FIG. 11, network adapter 420 communicates with the other modules of device 412 via bus 418. It should be appreciated that although not shown in the figures, other hardware and/or software modules may be used in conjunction with the device 412, including but not limited to: microcode, end drives, Redundant processors, external disk drive Arrays, RAID (Redundant Arrays of Independent Disks) systems, tape drives, and data backup storage systems, among others.

The processor 416 executes programs stored in the storage device 428 to perform various functional applications and data processing, for example, implement a distribution transformer replacement decision method provided by the embodiment of the present invention, the method includes:

determining a heavy overload distribution transformer and a standby distribution transformer of a target area;

formulating a replacement strategy of the heavy overload distribution transformer, wherein the replacement strategy comprises replacing the heavy overload distribution transformer and the heavy overload distribution transformer with the standby distribution transformer;

establishing a strategy target value for evaluating the exchange strategy, wherein the strategy target value comprises exchange frequency, exchange completion rate, distribution transformer exchange outage rate and standby exchange distribution transformer utilization rate;

arranging and combining different exchange strategies to obtain an exchange strategy group comprising the exchange strategies in different orders, and simulating and exchanging the heavy overload distribution transformer according to the exchange strategy group;

and calculating the strategy target values corresponding to the exchange strategy groups with different sequences, determining the optimal sequence of the exchange strategies according to the strategy target values, and determining the optimal sequence as the optimal decision scheme for exchanging the heavy overload distribution transformer.

Example nine

An embodiment of the present invention further provides a computer-readable storage medium, on which a computer program is stored, where the computer program, when executed by a processor, implements a distribution transformer exchange decision method according to an embodiment of the present invention, where the method includes:

determining a heavy overload distribution transformer and a standby distribution transformer of a target area;

formulating a replacement strategy of the heavy overload distribution transformer, wherein the replacement strategy comprises replacing the heavy overload distribution transformer and the heavy overload distribution transformer with the standby distribution transformer;

establishing a strategy target value for evaluating the exchange strategy, wherein the strategy target value comprises exchange frequency, exchange completion rate, distribution transformer exchange outage rate and standby exchange distribution transformer utilization rate;

arranging and combining different exchange strategies to obtain an exchange strategy group comprising the exchange strategies in different orders, and simulating and exchanging the heavy overload distribution transformer according to the exchange strategy group;

and calculating the strategy target values corresponding to the exchange strategy groups with different sequences, determining the optimal sequence of the exchange strategies according to the strategy target values, and determining the optimal sequence as the optimal decision scheme for exchanging the heavy overload distribution transformer.

Computer storage media for embodiments of the invention may employ any combination of one or more computer-readable media. The computer readable medium may be a computer readable signal medium or a computer readable storage medium. A computer readable storage medium may be, for example, but not limited to, an electronic, magnetic, optical, electromagnetic, infrared, or semiconductor system, apparatus, or device, or any combination of the foregoing. More specific examples (a non-exhaustive list) of the computer readable storage medium would include the following: an electrical connection having one or more wires, a portable computer 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. In the context of this document, a computer readable storage medium may be any tangible medium that can contain, or store a program for use by or in connection with an instruction execution system, apparatus, or device.

A computer readable signal medium may include a propagated data signal with computer readable program code embodied therein, for example, in baseband or as part of a carrier wave. Such a propagated data signal may take many forms, including, but not limited to, electro-magnetic, optical, or any suitable combination thereof. A computer readable signal medium may also be any computer readable medium that is not a computer readable storage medium and that can communicate, propagate, or transport a program for use by or in connection with an instruction execution system, apparatus, or device.

Program code embodied on a computer readable medium may be transmitted using any appropriate medium, including but not limited to wireless, wireline, optical fiber cable, RF, etc., or any suitable combination of the foregoing.

Computer program code for carrying out operations for aspects of the present invention may be written in any combination of one or more programming languages, including an object oriented programming language such as Java, Smalltalk, 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 computer, partly on the user's computer, as a stand-alone software package, partly on the user's computer and partly on a remote computer or entirely on the remote computer or terminal. In the case of a remote computer, the remote computer may be connected to the user's computer through any type of network, including a Local Area Network (LAN) or a Wide Area Network (WAN), or the connection may be made to an external computer (for example, through the Internet using an Internet service provider).

It is to be noted that the foregoing is only illustrative of the preferred embodiments of the present invention and the technical principles employed. It will be understood by those skilled in the art that the present invention is not limited to the particular embodiments described herein, but is capable of various obvious changes, rearrangements and substitutions as will now become apparent to those skilled in the art without departing from the scope of the invention. Therefore, although the present invention has been described in greater detail by the above embodiments, the present invention is not limited to the above embodiments, and may include other equivalent embodiments without departing from the spirit of the present invention, and the scope of the present invention is determined by the scope of the appended claims.

Claims (10)

1. A distribution transformer exchange decision method is characterized by comprising the following steps:

determining a heavy overload distribution transformer and a standby distribution transformer of a target area;

formulating a replacement strategy of the heavy overload distribution transformer, wherein the replacement strategy comprises replacing the heavy overload distribution transformer and the heavy overload distribution transformer with the standby distribution transformer;

establishing a strategy target value for evaluating the exchange strategy, wherein the strategy target value comprises exchange frequency, exchange completion rate, distribution transformer exchange outage rate and standby exchange distribution transformer utilization rate;

arranging and combining different exchange strategies to obtain an exchange strategy group comprising the exchange strategies in different orders, and simulating and exchanging the heavy overload distribution transformer according to the exchange strategy group;

and calculating the strategy target values corresponding to the exchange strategy groups with different sequences, determining the optimal sequence of the exchange strategies according to the strategy target values, and determining the optimal sequence as the optimal decision scheme for exchanging the heavy overload distribution transformer.

2. The method of claim 1, wherein the standby distribution transformers include at least an inventory distribution transformer and a light duty distribution transformer;

through it changes to be equipped with distribution transformer changes heavily transship distribution transformer includes: exchanging the heavy overload distribution transformer through the inventory distribution transformer, exchanging the heavy overload distribution transformer through the light load distribution transformer, and solving the heavy overload distribution transformer by standing;

the heavy overload distribution transformer is a distribution transformer with a load rate larger than or equal to a first load rate, and the light overload distribution transformer is a distribution transformer with a load rate smaller than or equal to a second load rate.

3. The method of claim 1, wherein the policy target value is expressed as:

wherein Y is the strategy target value, f is the exchange frequency, R is the exchange completion rate, S is the power distribution transformation exchange outage rate, and T is the standby transformation power distribution transformation utilization rate.

4. The method of claim 1, wherein interchanging between the heavily overloaded distribution transformer comprises:

sorting the heavily overloaded distribution transformers according to the capacity and the load rate of the distribution transformers;

judging whether the heavily overloaded distribution transformer in the first order can be exchanged with the heavily overloaded distribution transformer in the second order;

if the heavy overload distribution transformer in the first sequence can be exchanged with the heavy overload distribution transformer in the second sequence, exchanging is carried out, and whether the heavy overload distribution transformer in the second sequence can be exchanged with the heavy overload distribution transformer in the third sequence or not is continuously judged;

if the heavy overload distribution transformer sorted in the first order cannot be exchanged, the heavy overload distribution transformer sorted in the second order is switched to a distribution and transformation set which cannot be exchanged, and whether the heavy overload distribution transformer sorted in the first order can be exchanged or not is continuously judged;

and exchanging the heavy overload distribution transformers one by one, transferring the last exchanged heavy overload distribution transformer into inventory, and outputting and sequencing a distribution transformer set which cannot be exchanged.

5. The method of claim 2, wherein determining heavily overloaded distribution transformers and replacement distribution transformers for a target area comprises:

acquiring distribution transformer data of a target area, wherein the distribution transformer data comprises the name, the capacity, the model and the maximum load of a distribution transformer;

obtaining heavy overload distribution transformer data and light overload distribution transformer data according to the distribution transformer data;

inventory distribution transformer data is obtained, wherein the inventory distribution transformer data includes a name, a capacity, and a model of a distribution transformer.

6. The method of claim 2, wherein exchanging the heavily overloaded distribution transformer through the inventory distribution transformer comprises:

sorting the heavily overloaded distribution transformer and the inventory distribution transformer respectively according to the capacity and the load rate of the distribution transformer;

judging whether the inventory distribution transformers can exchange the heavily overloaded distribution transformer with the first in sequence one by one according to the sequence of the inventory distribution transformers;

if the first heavily overloaded distribution transformer in the sequence can be exchanged, the replacement is carried out, the first heavily overloaded distribution transformer in the sequence is transferred into the inventory, and the sequence of the inventory distribution transformer is updated;

if the inventory distribution transformer can not be exchanged and the first heavily overloaded distribution transformer can not be exchanged, the heavily overloaded distribution transformer which is ordered first is transferred into a distribution and transformation set which can not be exchanged, and whether the inventory distribution transformer can be exchanged and the second heavily overloaded distribution transformer can be continuously judged one by one according to the ordering of the inventory distribution transformer;

and (4) replacing the heavy overload distribution transformers one by one, and outputting and sequencing distribution transformer sets which cannot be replaced.

7. The method of claim 2, wherein swapping the heavily overloaded distribution transformer through the lightly loaded distribution transformer comprises:

respectively sequencing the heavy overload distribution transformer and the light overload distribution transformer according to the capacity and the load rate of the distribution transformer;

judging whether the light-load distribution transformers can be exchanged with the heavy-load distribution transformers in the first sequence one by one according to the sequence of the light-load distribution transformers;

if the light-load distribution transformer can exchange the heavy-overload distribution transformer sequenced first, the light-load distribution transformer and the heavy-overload distribution transformer sequenced first are exchanged;

if the light-load distribution transformers can not be exchanged and the first heavy-load distribution transformers in the sequence are not exchanged, the heavy-load distribution transformers in the sequence are transferred into a distribution and transformation set which can not be exchanged, and whether the light-load distribution transformers can be exchanged and the second heavy-load distribution transformers in the sequence are continuously judged one by one according to the sequence of the light-load distribution transformers;

and replacing the heavy overload distribution transformer and the light overload distribution transformer one by one, and outputting and sequencing a distribution transformer set which cannot be replaced.

8. The method of claim 2, wherein different switching strategies are permuted and combined to obtain a switching strategy set comprising different sequences of switching strategies, and wherein simulating switching of the heavily overloaded distribution transformer according to the switching strategy set comprises:

exchanging the heavy overload distribution transformers, exchanging the heavy overload distribution transformers through the inventory distribution transformers, exchanging the heavy overload distribution transformers through the light load distribution transformers, and solving four exchange strategies of the heavy overload distribution transformers according to terms to be arranged and combined so as to obtain exchange strategy groups of the exchange strategies with different sequences;

executing each ordered set of switching strategies to perform simulated switching of the heavily overloaded distribution transformer.

9. The method as claimed in any one of claims 4, 6 and 7, wherein the determining whether the distribution transformer can replace the heavily overloaded distribution transformer is based on whether the distribution transformer is the same type as the heavily overloaded distribution transformer and whether the corresponding load rate of the distribution transformer when simulating the replacement of the heavily overloaded distribution transformer is less than a preset load rate.

10. A distribution transformer exchange decision device, comprising:

the distribution transformer determining module is used for determining a heavy overload distribution transformer and a standby distribution transformer in a target area;

the exchange strategy making module is used for making an exchange strategy of the heavy overload distribution transformer, wherein the exchange strategy comprises exchanging the heavy overload distribution transformer and the heavy overload distribution transformer through the standby exchange distribution transformer;

the strategy target value establishing module is used for establishing a strategy target value for evaluating the exchange strategy, wherein the strategy target value comprises exchange frequency, exchange completion rate, distribution transformer exchange outage rate and standby exchange distribution transformer utilization rate;

the distribution transformer simulation exchange module is used for carrying out permutation and combination on different exchange strategies to obtain an exchange strategy group comprising the exchange strategies in different sequences, and simulating and exchanging the heavy overload distribution transformer according to the exchange strategy group;

and the optimal decision scheme determining module is used for calculating the strategy target values corresponding to the exchange strategy groups with different sequences, determining the optimal sequence of the exchange strategies according to the strategy target values, and determining the optimal sequence as the optimal decision scheme for exchanging the heavy overload distribution transformer.

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