CN113013855B

CN113013855B - Power distribution network fault recovery method and device and terminal equipment

Info

Publication number: CN113013855B
Application number: CN202110275674.2A
Authority: CN
Inventors: 马天祥; 贾伯岩; 范辉; 张智远; 沈宏亮; 段昕; 贾静然
Original assignee: State Grid Corp of China SGCC; Electric Power Research Institute of State Grid Hebei Electric Power Co Ltd
Current assignee: State Grid Corp of China SGCC; Electric Power Research Institute of State Grid Hebei Electric Power Co Ltd
Priority date: 2021-03-15
Filing date: 2021-03-15
Publication date: 2022-12-20
Anticipated expiration: 2041-03-15
Also published as: CN113013855A

Abstract

The invention is suitable for the technical field of power systems, and provides a power distribution network fault recovery method, a power distribution network fault recovery device and terminal equipment, wherein the power distribution network fault recovery method comprises the following steps: under the condition that the fault occurrence position is not adjacent to a contact switch of the power distribution network, acquiring a first transfer load total amount of a plurality of transfer areas needing to be transferred at the transfer moment according to the historical electricity utilization load amount of the plurality of transfer areas corresponding to the fault occurrence position; when the redundant electric quantity corresponding to the interconnection switch is smaller than the total quantity of the first transfer load, determining a station area to be cut in a plurality of station areas needing transfer according to a power utilization difference dynamic evaluation value of the station areas needing transfer at the transfer moment, wherein the power utilization difference dynamic evaluation value is acquired in advance; and cutting off the areas to be cut, and closing the contact switch to carry out switching recovery on the areas needing to be switched except the areas needing to be cut in the plurality of areas needing to be switched. The invention can improve the utilization rate of the transfer resources.

Description

Power distribution network fault recovery method and device and terminal equipment

Technical Field

The invention belongs to the technical field of power systems, and particularly relates to a power distribution network fault recovery method, a power distribution network fault recovery device and terminal equipment.

Background

After the power distribution network breaks down, the fault recovery of the power distribution network can be carried out through the rapid isolation and self-healing technology, so that the fault power failure time is reduced, and the power supply reliability of the power distribution network is improved. The method for recovering the power distribution network fault is characterized in that after the power distribution network fault occurs, the optimal switch combination scheme is determined, the aims of recovering the maximum power loss load, the minimum switch operation frequency, the minimum network loss, the minimum complaint and the like are achieved, and meanwhile, the connectivity, the radiation performance, the feeder line non-overload performance and the like of the power distribution network after the recovery are met.

However, in the process of formulating the existing failure transfer recovery scheme, a recovery power supply mode for a non-failure region in a failure line has a problem of low transfer resource utilization rate.

Disclosure of Invention

In view of this, embodiments of the present invention provide a method, an apparatus, and a terminal device for recovering a power distribution network fault, so as to solve the problem of low utilization rate of transit supply resources in the prior art.

A first aspect of an embodiment of the present invention provides a power distribution network fault recovery method, including:

under the condition that the fault occurrence position is not adjacent to a contact switch of the power distribution network, acquiring a first transfer load total amount of a plurality of transfer areas needing to be transferred at the transfer moment according to the historical electricity utilization load amount of the plurality of transfer areas corresponding to the fault occurrence position;

when the redundant electric quantity corresponding to the interconnection switch is smaller than the total first transfer load, determining a to-be-cut station area in a plurality of to-be-transferred station areas according to the power utilization difference dynamic evaluation value of the to-be-transferred station area at the transfer moment, which is acquired in advance; the total amount of second transfer loads of the transfer areas needing to be switched except the areas to be switched in the plurality of areas needing to be switched is less than or equal to the redundant electric quantity;

and cutting off the areas to be cut, and closing the contact switch to carry out switching recovery on the areas needing to be switched except the areas needing to be cut in the plurality of areas needing to be switched.

Optionally, obtaining a first total transfer load amount of the multiple transfer-required distribution areas at the transfer time according to the historical electricity utilization load amounts of the multiple transfer-required distribution areas corresponding to the fault occurrence positions, including:

estimating the transfer load amount of each transfer-required station area in a plurality of transfer-required station areas at the transfer moment according to the historical power utilization load amount;

and determining the sum of the transfer load quantity of each transfer-required platform area in the plurality of transfer-required platform areas as the first transfer load total quantity.

Optionally, estimating a transfer load amount of each transfer-required distribution area in the multiple transfer-required distribution areas at the transfer time according to the historical power consumption load amount, where the estimating includes:

acquiring N electricity utilization load quantities of a target platform area in the same day before a fault occurs; the target transformer area is any one of a plurality of transformer areas needing to be transformed;

acquiring X electric load quantities before the transfer time every day in M days before the target platform area and Y electric load quantities after the transfer time every day in M days before the target platform area;

determining the maximum value of the N electric load quantities, the M multiplied by X electric load quantities and the M multiplied by Y electric load quantities as the transfer supply electric load quantity of the target platform area at the transfer supply time;

wherein M, N, X and Y are integers greater than zero.

Optionally, determining, according to a power consumption difference dynamic evaluation score of a to-be-transferred station area at a transfer time, a station area to be removed in the multiple to-be-transferred station areas, which is obtained in advance, includes:

sequencing a plurality of areas needing to be transferred according to the sequence of the power utilization difference dynamic evaluation scores from small to large;

determining a to-be-transferred distribution area with a sequence number as a first target sequence number in a plurality of to-be-transferred distribution areas; the total third transfer load of all the transfer-required station areas with the sequence numbers behind the first target sequence number is less than or equal to the redundant electric quantity, and the total fourth transfer load of all the transfer-required station areas with the sequence numbers behind the first target sequence number and the transfer-required station areas with the sequence numbers as the first target sequence numbers is greater than or equal to the redundant electric quantity;

and determining all the areas needing to be transferred with the sequence numbers behind the first target sequence number as the areas to be cut off.

sequencing a plurality of areas needing to be transferred according to the sequence of the dynamic evaluation scores of the power utilization difference from large to small;

determining a transfer-required station area with the serial number being a second target serial number in the plurality of transfer-required station areas; the total fifth transfer load of all the transfer-required station areas with the sequence numbers before the second target sequence number is less than or equal to the redundant electric quantity, and the total sixth transfer load of all the transfer-required station areas with the sequence numbers before the second target sequence number and the transfer-required station areas with the sequence numbers as the second target sequence numbers is greater than or equal to the redundant electric quantity;

and determining all the areas needing to be transferred with the sequence numbers before the second target sequence number as the areas to be cut off.

Optionally, the power utilization difference dynamic evaluation score is obtained based on at least one of a power utilization dependence score, a power outage tolerance score, or a historical power outage score.

Optionally, the power utilization dependence score is obtained based on a difference value between the maximum power utilization load and the minimum power utilization load of the power distribution area needing to be transferred in the previous day and a corresponding relation between the power utilization load of the power distribution area needing to be transferred at the time of power distribution;

the power failure tolerance score is obtained based on the corresponding relation between the average complaint times and the average complaint interval of the transformer area to be transferred;

the historical power failure score is obtained based on the corresponding relation between the power failure times of the power transfer platform area in the preset time period and the total power failure number of the whole line.

Optionally, before determining the power distribution grid to be removed in the multiple power distribution grid areas according to the power utilization difference dynamic evaluation value of the power distribution grid areas needing to be transferred at the power transfer time, which is obtained in advance, the power distribution grid fault recovery method further includes:

acquiring the electricity utilization dependence value, the power failure tolerance value and the historical power failure value of a to-be-transferred station area at the time of transferring;

and determining the sum of the power utilization dependence value and the multiplication value of the first preset weight, the multiplication value of the power failure tolerance value and the second preset weight, and the multiplication value of the historical power failure value and the third preset weight as the power utilization difference dynamic evaluation value of the area needing to be transferred at the transfer time.

A second aspect of the embodiments of the present invention provides a power distribution network fault recovery apparatus, including:

the acquisition module is used for acquiring the total first transfer load quantity of a plurality of areas needing transfer and supplying at the transfer and supply moment according to the historical electricity utilization load quantity of the plurality of areas needing transfer and supplying corresponding to the fault occurrence position under the condition that the fault occurrence position is not adjacent to the contact switch of the power distribution network;

the determining module is used for determining a to-be-cut power distribution area in a plurality of power distribution areas needing to be transferred according to the power utilization difference dynamic evaluation value of the power distribution areas needing to be transferred at the power distribution moment, which is obtained in advance, when the redundant power quantity corresponding to the interconnection switch is smaller than the total first power distribution load quantity; the total amount of second transfer loads of the transfer areas needing to be switched except the areas to be switched in the plurality of areas needing to be switched is less than or equal to the redundant electric quantity;

and the control module is used for cutting off the to-be-cut off transformer areas and closing the contact switch so as to carry out switching recovery on the to-be-switched transformer areas except the to-be-cut off transformer areas in the plurality of to-be-switched transformer areas.

Optionally, the obtaining module is further configured to:

wherein M, N, X and Y are integers greater than zero.

Optionally, the determining module is further configured to:

determining a transfer-required station area with a sequence number of a first target sequence number in a plurality of transfer-required station areas; the total third transfer load of all the transfer-required station areas with the sequence numbers behind the first target sequence number is less than or equal to the redundant electric quantity, and the total fourth transfer load of all the transfer-required station areas with the sequence numbers behind the first target sequence number and the transfer-required station areas with the sequence numbers as the first target sequence numbers is greater than or equal to the redundant electric quantity;

Optionally, the determining module is further configured to: :

sequencing a plurality of areas needing to be transferred according to the sequence of the power utilization difference dynamic evaluation scores from large to small;

determining a transfer-required station area with the serial number being a second target serial number in the plurality of transfer-required station areas; the total fifth transfer load of all the transfer-required areas with the serial numbers before the second target serial number is less than or equal to the redundant electric quantity, and the total sixth transfer load of all the transfer-required areas with the serial numbers before the second target serial number and the transfer-required areas with the serial numbers as the second target serial numbers is greater than or equal to the redundant electric quantity;

Optionally, the electricity utilization dependency score is obtained based on a difference between the maximum electricity load and the minimum electricity load of the power distribution area needing to be transferred in the previous day and a corresponding relationship between the maximum electricity load and the minimum electricity load of the power distribution area needing to be transferred in the power distribution moment;

the power failure tolerance value is obtained based on the corresponding relation between the average complaint times and the average complaint interval of the transformer area to be transferred;

the historical power failure score is obtained based on the corresponding relation between the power failure times of the power supply area needing to be transferred in a preset time period and the total power failure number of the whole line.

Optionally, the determining module is further configured to:

acquiring the electricity utilization dependence value, the power failure tolerance value and the historical power failure value of a power transfer station area at the power transfer time;

and determining the sum of the power utilization dependence value and the multiplication value of the first preset weight, the multiplication value of the power failure tolerance value and the second preset weight, and the multiplication value of the historical power failure value and the third preset weight as the power utilization difference dynamic evaluation value of the power-transfer platform area at the power transfer time.

A third aspect of the embodiments of the present invention provides a terminal device, which includes a memory, a processor, and a computer program stored in the memory and executable on the processor, and when the processor executes the computer program, the steps of the method according to the first aspect are implemented.

Compared with the prior art, the embodiment of the invention has the following beneficial effects:

in the embodiment of the invention, the first total transfer load amount of a plurality of transfer-required transformer areas at the transfer time can be dynamically evaluated, and the first total transfer load amount obtained by evaluation can reflect the actual power load of each transfer-required transformer area at the transfer time, so that the problem of transfer capacity waste caused by capacity evaluation by adopting rated load can be avoided, and the transfer resource utilization rate is improved. And then, when the redundant electric quantity corresponding to the interconnection switch is smaller than the total quantity of the first transfer load, determining the areas to be cut in the plurality of areas to be transferred according to the power utilization difference dynamic evaluation value of the areas to be transferred at the transfer moment, which is acquired in advance, so that the areas to be cut can be cut, and the interconnection switch is closed to transfer and restore the areas to be transferred except the areas to be cut in the plurality of areas to be transferred.

Because the power consumption difference dynamic evaluation value can reflect the power consumption requirements of users in different power distribution areas needing to be supplied, the power consumption grades can be secondarily divided for the users in the same grade based on the power consumption difference dynamic evaluation value, so that the power supply transfer of the power distribution area with high power consumption grade can be preferentially recovered based on the secondarily divided power consumption grades, the power consumption requirements of different users can be met to the greatest extent, and the power consumption satisfaction of the users is improved.

Drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings needed to be used in the embodiments or the prior art descriptions will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without inventive exercise.

Fig. 1 is a schematic diagram of a deployment architecture according to an embodiment of the present invention;

fig. 2 is a schematic diagram of another deployment architecture according to an embodiment of the present invention;

fig. 3 is a flowchart illustrating steps of a method for recovering a power distribution network fault according to an embodiment of the present invention;

fig. 4 is a schematic diagram of a failure recovery processing flow according to an embodiment of the present invention;

fig. 5 is a schematic diagram of a power distribution network fault recovery apparatus according to an embodiment of the present invention;

fig. 6 is a schematic diagram of a terminal device according to an embodiment of the present invention.

Detailed Description

In the following description, for purposes of explanation and not limitation, specific details are set forth such as particular system structures, techniques, etc. in order to provide a thorough understanding of the embodiments of the invention. It will be apparent, however, to one skilled in the art that the present invention may be practiced in other embodiments that depart from these specific details. In other instances, detailed descriptions of well-known systems, devices, circuits, and methods are omitted so as not to obscure the description of the present invention with unnecessary detail.

In order to illustrate the technical means of the present invention, the following description is given by way of specific examples.

In order to reduce the effect of power failure as much as possible, two distribution lines may be connected by a switch to realize switching between loads, and the switch for connecting the two distribution lines is called a "tie switch". In the process of formulating the existing power distribution network fault transfer recovery scheme, capacity evaluation is generally carried out according to the rated load of a non-fault area in a fault line, and if the redundant capacity of a normal line is larger than the evaluation capacity of the non-fault area, a contact switch is closed to transfer the non-fault area of the fault line; if the redundant capacity of the normal line is smaller than the evaluation capacity of the non-fault area, the load with the higher priority level is guaranteed to be supplied with power again, and other loads can only be cut off.

Although the method realizes the failure transfer recovery, the method has the following disadvantages:

in actual operation, the load of most transformer areas at the moment of failure is far smaller than the rated load capacity of the transformer areas, and if a mode of carrying out capacity evaluation on the rated load of a non-failure area is adopted, the waste of the supply capacity is caused, and the electric power resources are not fully and effectively utilized. Therefore, in the process of formulating the existing fault transfer recovery scheme, the problem of low transfer resource utilization rate exists in the power supply recovery mode aiming at the non-fault area in the fault line.

In addition, by adopting the mode of preferentially ensuring the higher-grade load to recover power supply, although the high-grade users are ensured to recover power supply quickly, in practice, the user grades in partial areas are the same and are common users, at the moment, the mode of selecting the recovery areas is random, and reasonable power supply transfer is not carried out by combining the power supply reliability requirements of the users, so that the power failure complaints of the users are frequent, the power supply service level is reduced, and the social influence is large.

In order to solve the problem of the prior art, the embodiment of the invention provides a power distribution network fault recovery method, a power distribution network fault recovery device and terminal equipment. First, a method for recovering a fault of a power distribution network according to an embodiment of the present invention is described below.

The execution main body of the power distribution network fault recovery method can be a power distribution network fault recovery device, the power distribution network fault recovery device can be a terminal device with a processor and a memory, such as a fault self-healing transfer device, the device can be deployed at a power distribution automation main station or a tie switch, a corresponding station area main switch can be in communication connection with a station area intelligent fusion terminal, and the station area intelligent fusion terminal can be in communication connection with the power distribution automation main station. If the fault self-healing transfer equipment is deployed in the distribution automation main station, the corresponding deployment architecture is shown in fig. 1, and the distribution automation main station can remotely control the intelligent integration terminal of the distribution area so as to realize the switching-on and switching-off of the main switch of the distribution area. If the fault self-healing switching equipment is deployed at the contact switch, the corresponding deployment framework is shown in fig. 2, the fault self-healing switching equipment can be embedded into the contact switch intelligent terminal in a micro application mode, correspondingly, the contact switch is in transverse communication connection with all the fusion terminals of the circuit where the fault self-healing switching equipment is located, and the contact switch intelligent terminal can be switched on and off through the console area intelligent fusion terminal.

As shown in fig. 3, the method for recovering a fault of a power distribution network according to an embodiment of the present invention may include the following steps:

and S310, under the condition that the fault occurrence position is not adjacent to the interconnection switch of the power distribution network, acquiring the total first transfer load amount of the plurality of transfer-required distribution areas at the transfer moment according to the historical electricity utilization load amount of the plurality of transfer-required distribution areas corresponding to the fault occurrence position.

And S320, when the redundant electric quantity corresponding to the interconnection switch is smaller than the total first transfer load, determining a station area to be cut in the plurality of station areas needing to be transferred according to the power utilization difference dynamic evaluation value of the pre-acquired station areas needing to be transferred at the transfer moment.

And S330, cutting off the areas to be cut off, and closing the contact switch to carry out switching recovery on the areas to be switched except the areas to be cut off in the plurality of areas to be switched.

In the embodiment of the invention, the first total transfer load of a plurality of areas needing transfer at the transfer moment can be dynamically evaluated, and the first total transfer load obtained by evaluation can reflect the actual power load of each area needing transfer at the transfer moment, so that the problem of transfer capacity waste caused by capacity evaluation by adopting rated load can be avoided, and the utilization rate of transfer resources is improved. And then, when the redundant electric quantity corresponding to the interconnection switch is smaller than the total quantity of the first transfer load, determining the areas to be cut in the plurality of areas to be transferred according to the power utilization difference dynamic evaluation value of the areas to be transferred at the transfer moment, which is acquired in advance, so that the areas to be cut can be cut, and the interconnection switch is closed to transfer and restore the areas to be transferred except the areas to be cut in the plurality of areas to be transferred.

Next, step S310 will be described.

In some embodiments, when a fault self-healing transfer scheme is established, it may be determined whether the fault occurrence location is adjacent to the tie switch. If the fault occurrence location is adjacent to the tie switch, it is necessary to keep the tie switch in the off state to avoid a sudden power supply causing secondary damage to the associated equipment at the fault occurrence location.

If the fault occurrence position is not adjacent to the interconnection switch, whether the redundant electric quantity corresponding to the interconnection switch, namely the power supply capacity at the non-fault side, is sufficient or not needs to be further judged, and then a corresponding transfer recovery scheme is formulated according to the judgment result. If the redundant electric quantity corresponding to the interconnection switch is larger than or equal to the total first transfer load of the plurality of transfer areas needing to be transferred corresponding to the fault occurrence position at the transfer time, namely the time of executing transfer processing, the redundant electric quantity corresponding to the interconnection switch is sufficient, and the plurality of transfer areas needing to be transferred corresponding to the fault occurrence position can be completely transferred. If the redundant electric quantity corresponding to the interconnection switch is smaller than the total quantity of first transfer loads of a plurality of transfer-required distribution areas corresponding to the fault occurrence positions at the transfer moment, the redundant electric quantity corresponding to the interconnection switch is insufficient, and the partial transfer-required distribution areas corresponding to the fault occurrence positions can be transferred.

Optionally, the specific processing of obtaining the total amount of the first transfer load of the multiple transfer-required distribution areas at the transfer time according to the historical electricity utilization load of the multiple transfer-required distribution areas corresponding to the fault occurrence positions in step S310 may be as follows: estimating the transfer load amount of each transfer-required station area in a plurality of transfer-required station areas at the transfer moment according to the historical power utilization load amount; and determining the sum of the transfer load quantity of each transfer-required platform area in the plurality of transfer-required platform areas as the first transfer load total quantity.

In some embodiments, the historical electricity usage load may be the electricity usage load for the block at different times, e.g., at various integer points, on the day and several days before the fault occurred.

Taking any one of the areas needing to be transferred as an example, the area needing to be transferred may be called a target area, and a process of estimating a transfer load amount of the target area is described.

Specifically, N electricity utilization loads in the current day before the fault occurs in the target cell, X electricity utilization loads before the power supply time each day in M current days before the target cell, and Y electricity utilization loads after the power supply time each day in M current days before the target cell may be obtained, where M, N, X, and Y are integers greater than zero. It should be noted that the X and Y electricity loads are preferably the electricity loads closest to the integral point of the power transfer time, so that the electricity load of the target area at the power transfer time can be estimated more accurately. Further, the above-mentioned transfer time of each day in the preceding M days means a time corresponding to a time at which the transfer processing is performed in each day, for example, the time at which the transfer processing is performed on the current day is 30 minutes at 10 am, and the transfer time of each day in the preceding M days means 30 minutes at 10 am of the corresponding day.

Then, the maximum value among the N electric load amounts, the M × X electric load amounts, and the M × Y electric load amounts may be determined as the transfer electric load amount of the target station area at the transfer timing. Therefore, the transfer load amount of each transfer-required platform area in the plurality of transfer-required platform areas can be estimated and obtained based on the load condition of each transfer-required platform area.

Finally, the sum of the transfer load amount of each transfer-required platform area in the plurality of transfer-required platform areas can be determined as the first transfer load total amount. Therefore, the first transfer load total amount of the plurality of transfer-needed areas at the transfer time can be obtained.

Step S320 is described below.

In some embodiments, the electricity usage differential dynamic rating score may be derived based on at least one of an electricity usage dependency score, a blackout tolerance score, or a historical blackout score. The power utilization dependence score can be obtained based on the difference value between the maximum power utilization load and the minimum power utilization load of the power distribution area needing to be transferred in the previous day and the corresponding relation between the maximum power utilization load and the minimum power utilization load of the power distribution area needing to be transferred at the time of power distribution; the power failure tolerance score can be obtained based on the corresponding relation between the average complaint times and the average complaint interval of the transformer area needing to be transferred; the historical power failure score can be obtained based on the corresponding relation between the power failure times of the power transfer platform area in the preset time period and the total power failure number of the whole line.

Specifically, different scores can be set by setting different gears. Taking the electricity utilization dependence score as an example, the difference between the maximum electricity utilization load and the minimum electricity utilization load of the power distribution area needing to be transferred in the previous day can be divided into a preset number of equal divisions, for example, five equal divisions, and then the difference of different number of equal divisions is sequentially added on the basis of the minimum electricity utilization load, so that the electricity utilization loads of the preset number of grades can be obtained, and correspondingly, the electricity utilization dependence scores corresponding to the electricity utilization loads of the preset number of grades can be set. And then, determining a corresponding electricity utilization dependence score according to the electricity utilization load gear position of the electricity utilization load of the transfer-supply-needed platform area at the transfer-supply moment.

It is worth mentioning that the power utilization difference dynamic evaluation score can reflect the power utilization requirements of users needing to be transferred to the power distribution area, so that the power utilization grades can be secondarily divided for the users in the same grade based on the power utilization difference dynamic evaluation score, the power supply transfer of the power distribution area with the high power utilization grade can be preferentially recovered based on the power utilization grades of the secondary division, the power utilization requirements of different users can be met to the greatest extent, and the power utilization satisfaction degree of the users is improved.

Optionally, the power utilization difference dynamic evaluation score may be obtained according to the weight corresponding to each type of score, and the corresponding processing may be as follows: acquiring the electricity utilization dependence value, the power failure tolerance value and the historical power failure value of a to-be-transferred station area at the time of transferring; and determining the sum of the power utilization dependence value and the multiplication value of the first preset weight, the multiplication value of the power failure tolerance value and the second preset weight, and the multiplication value of the historical power failure value and the third preset weight as the power utilization difference dynamic evaluation value of the power-transfer platform area at the power transfer time.

In some embodiments, the power transfer time is T time, and the power utilization difference dynamic evaluation score of a certain area at T time is

Wherein N is ₁ 、N ₂ 、N ₃ Weight coefficients of the electricity utilization dependence score, the blackout tolerance score and the historical blackout score, 0<N ₁ <1、0<N ₂ <1、0<N ₃ <1，N ₁ +N ₂ +N ₃ ＝1；

The electricity utilization dependence score of the station area at the time T,

the power failure tolerance value of the station area at the time T,

and the historical power failure score of the station area at the time T. Specifically, N ₁ 、N ₂ 、N ₃ Can be set according to actual conditions, e.g. N can be adopted ₁ ＝N ₂ ＝N ₃ =1/3, and the embodiment of the present invention does not specifically limit thereto.

Therefore, after the first total transfer load of the multiple transfer-supply-required transformer areas at the transfer time is obtained, if the redundant electric quantity corresponding to the interconnection switch is smaller than the first total transfer load, the transformer area to be cut can be determined in the multiple transfer-supply-required transformer areas according to the power utilization difference dynamic evaluation value of the pre-obtained transfer-required transformer areas at the transfer time. It should be noted that the power utilization difference dynamic evaluation score of the to-be-removed power distribution area is smaller than the power utilization difference dynamic evaluation score of the power distribution area which is not removed. If the station areas with the same power utilization difference dynamic evaluation values exist, the priority of the station area with the larger power utilization load amount can be set to be higher than that of the station area with the smaller power utilization load amount, namely, the station area with the smaller power utilization load amount is determined as the station area to be cut off, and then the station area with the larger power utilization load amount is determined as the station area to be cut off.

It should be noted that the table area to be cut off also has the following characteristics: and the total second transfer load of the transfer areas needing to be switched except the areas to be switched out in the plurality of transfer areas needing to be switched out is less than or equal to the redundant electric quantity. Therefore, after the to-be-cut transformer areas are cut off, the redundant electric quantity corresponding to the contact switch is larger than or equal to the total quantity of the residual transformer load needing to be transformed, and then the power supply transformation recovery can be carried out on the residual transformer area needing to be transformed. Because the dynamic evaluation scores of the power utilization difference of the remaining power-transferring transformer areas are higher, the power utilization requirements of different users can be met to the greatest extent, the power utilization satisfaction of the users is improved, power failure complaints are reduced, and the power supply service level is improved.

Optionally, the table area to be cut can be determined by a sorting mode.

In some embodiments, the plurality of zones to be transferred can be sorted in the order of the power utilization difference dynamic evaluation scores from small to large. And then, determining the transfer-required station areas with the sequence numbers of the first target sequence numbers in the plurality of transfer-required station areas, wherein the total third transfer-required load amounts of all the transfer-required station areas with the sequence numbers behind the first target sequence numbers are less than or equal to the redundant electric quantity, and the total fourth transfer-required load amounts of all the transfer-required station areas with the sequence numbers behind the first target sequence numbers and the transfer-required station areas with the sequence numbers of the first target sequence numbers are greater than or equal to the redundant electric quantity. Finally, all the areas needing to be transferred with the sequence numbers behind the first target sequence number can be determined as the areas to be cut off. Therefore, the redundant capacity can be utilized to the maximum extent through the mode, and the utilization efficiency of the power grid resources is greatly improved.

In some embodiments, the plurality of zones needing to be transferred can be sorted according to the order of the dynamic evaluation scores of the power utilization difference from large to small. And then, determining a region needing to be transferred with a sequence number of a second target sequence number in the plurality of regions needing to be transferred, wherein the total fifth transfer load of all regions needing to be transferred with sequence numbers before the second target sequence number is less than or equal to the redundant electric quantity, and the total sixth transfer load of all regions needing to be transferred with sequence numbers before the second target sequence number and the region needing to be transferred with sequence numbers before the second target sequence number is greater than or equal to the redundant electric quantity. Finally, all the areas needing to be transferred with the sequence numbers before the second target sequence number can be determined as the areas to be cut off.

Next, step S330 will be described.

In some embodiments, after the to-be-cut off platform area is determined, the to-be-cut off platform area can be cut off, and then the contact switch is closed, so that the to-be-switched-off platform areas except the to-be-cut off platform area in the multiple to-be-switched-off platform areas can be switched off and recovered.

It should be noted that, because the power loads of the power distribution areas needing to be transferred and the redundant power amount corresponding to the interconnection switch are dynamically changed, the power loads of the power distribution areas needing to be transferred can be re-evaluated every preset time period, for example, 1 hour or 2 hours, and then the power distribution areas to be removed are re-determined based on the real-time redundant power amount.

In order to better understand the method for recovering the fault of the power distribution network provided by the embodiment of the invention, a fault recovery processing flow is provided below, as shown in fig. 4.

When a fault self-healing transfer scheme is formulated, whether the fault occurrence position is adjacent to the interconnection switch or not is judged. If the two adjacent contact switches are adjacent, the contact switch is locked to keep the open state of the contact switch. If not, judging the power supply capacity S of the non-fault side of the interconnection switch _{Is not} (amount of redundant power) is sufficient.

Specifically, the capacity of the area is transferred to the fault side

Performing dynamic estimation on the basis of the obtained data

Then the interconnection switch is closed and the fault side needs to be transferredRestoring power supply in the area; if it is

Sorting the distribution areas from low to high according to the power utilization difference dynamic evaluation scores of the distribution areas in the area, wherein S _ATj The capacity of the station area A of the j th position of the rank at the time T is represented by a formula

And calculating K, and closing the interconnection switch after sequentially cutting off the distribution areas with the sequence less than or equal to K.

The capacity of the area needing to be supplied can be estimated according to different supply times, the load values of two integral points before and after the supply time of M days before the transformer area and the load values of two integral points before the fault time of the day can be taken, the total number of 4 xM +2 acquisition points is calculated, and the maximum value is taken as the estimated load value of the transformer area at the moment at the T moment. If the transfer scheme needs to be changed, the capacity of the area needing to be transferred is estimated according to the new transfer time. Wherein T is the nearest integer point at the fault time, S _iT And the load quantity of the station area I at the time T is represented, and the N represents the number of the station areas of the fault side required transfer area.

The station area power consumption difference dynamic evaluation score may be composed of three elements, i.e., a power consumption dependency score, a power outage tolerance score, and a historical power outage score.

Specifically, the electricity utilization dependency value can reflect the electricity utilization dependency of the user, namely the degree of the user's dependency on the electric energy at a certain time can be obtained through the platform area electricity load curve. The electricity utilization dependence score can be divided into 5 grades, I = (the maximum load of electricity utilization on the previous day-the minimum load of electricity utilization on the previous day)/4 is set, and when the user load is in the time of T<Defining the evaluation result of the electricity utilization dependence score at the time T when the minimum load + I' of the electricity utilization of the previous day

By analogy, when the current daily power consumption minimum load + I<User load at time T<Evaluation result of electricity utilization dependence score at T moment when minimum load of electricity utilization in previous day is +2I

When "minimum load of power consumption of previous day +2I<User load at time T<Evaluation result of electricity utilization dependence score at T moment when minimum load of electricity utilization in previous day is +3I

When "minimum load of power consumption in the past day +3I<User load at time T<Evaluation result of electricity utilization dependence score at T moment when the minimum load of electricity utilization of the previous day is +4I

When "minimum load of power consumption in the past day +4I<T moment user load, T moment electricity utilization dependence score evaluation result

The power failure tolerance score can reflect the power failure tolerance of the user, namely the average tolerance degree of the user in a certain region to power failure, and the value of the power failure tolerance score is equal to the easy complaint coefficient of the region

Tolerance coefficient to power failure

To sum, i.e.

Wherein,

when the temperature is higher than the set temperature

Area complaint-prone coefficient

When the temperature is higher than the set temperature

Area complaint coefficient

The power failure complaint interval can be defined as the time interval of subtracting the power failure time of the platform area from the first power failure complaint call incoming time of the platform area after a certain power failure of the platform area. Wherein,

when the temperature is higher than the set temperature

Tolerance coefficient in power failure

When in use

Tolerance coefficient in power failure

If the user does not complain about the power failure at a certain time, the power failure event is not counted.

The historical power failure score can reflect the power failure frequency of a region, and can be divided into 5 grades, and I is set _t = 4 total number of blackouts in each district of the whole line in nearly three months, when "number of blackouts in a certain district in nearly three months<I _t Time, historical outage score of the station

By analogy, when "I" is _t Number of blackouts in approximately three months in an area ≦<2I _t "time, historical outage score for that region

When is "2I _t Number of blackouts in approximately three months in an area ≦<3I _t "time, historical outage score for that region

When "3I _t Less than or equal to the number of blackouts in an area in approximately three months<4I _t "time, historical outage score for that region

When "4I _t When the power failure number in a region is less than or equal to three months, the historical power failure value of the region

After the supply, if a certain moment, the total amount of the load supplied>S _{Is not (1)} If the non-fault line is overloaded, the power supply transfer areas can be cut off from low to high in sequence according to the power utilization difference dynamic evaluation score of the power supply transfer areas until the total amount of the power supply transfer load<S _{Is not (1)} 。

The power distribution network fault recovery method provided by the embodiment of the invention adopts a real-time load budget method, so that the power grid transfer capacity can be maximally applied, and the utilization efficiency of power grid resources is greatly improved. In addition, a new solution is provided for the power distribution network with insufficient conversion power, and the high-efficiency utilization of the capacity resources of the power grid is realized while the reliability of power supply is guaranteed. And moreover, by adopting a dynamic evaluation method, the power utilization requirements of the distribution room in different time periods can be evaluated, and a fault recovery scheme is more reasonable. Meanwhile, the difference of the power consumption of the users is also considered, the power supply capacity of the power grid and the power consumption requirements of the users are considered, the service quality is improved, the data resource implementation can be based on the existing data resource, and the practicability is high.

Based on the power distribution network fault recovery method provided by the embodiment, correspondingly, the invention also provides a specific implementation mode of the power distribution network fault recovery device applied to the power distribution network fault recovery method. Please see the examples below.

As shown in fig. 5, there is provided a power distribution network fault recovery apparatus 500, comprising:

an obtaining module 510, configured to obtain, when a fault occurrence location is not adjacent to a tie switch of a power distribution network, a first total transfer load amount of a plurality of power transfer required distribution areas at a power transfer time according to a historical power consumption load amount of the plurality of power transfer required distribution areas corresponding to the fault occurrence location;

a determining module 520, configured to determine, when the redundant power amount corresponding to the interconnection switch is smaller than the first total transfer load amount, a to-be-removed distribution area in the multiple distribution areas needing to be transferred according to a power consumption difference dynamic evaluation score of the distribution area needing to be transferred at the transfer time, which is obtained in advance; the total amount of second transfer loads of the transfer areas needing to be switched except the areas to be switched in the plurality of areas needing to be switched is less than or equal to the redundant electric quantity;

and the control module 530 is used for cutting off the to-be-cut off areas and closing the interconnection switch so as to perform switching recovery on the to-be-switched off areas except the to-be-cut off areas in the plurality of to-be-switched off areas.

Optionally, the obtaining module is further configured to:

and determining the sum of the transfer load quantity of each transfer-required area in the plurality of transfer-required areas as the first transfer load total quantity.

Optionally, the obtaining module is further configured to:

wherein M, N, X and Y are integers greater than zero.

Optionally, the determining module is further configured to:

sequencing a plurality of areas needing to be transferred according to the sequence of the dynamic evaluation scores of the power utilization difference from small to large;

determining a to-be-transferred distribution area with a sequence number as a first target sequence number in a plurality of to-be-transferred distribution areas; the third transfer load total amount of all the transfer areas with the sequence numbers behind the first target sequence number is less than or equal to the redundant electric quantity, and the fourth transfer load total amount of all the transfer areas with the sequence numbers behind the first target sequence number and the transfer areas with the sequence numbers as the first target sequence number is greater than or equal to the redundant electric quantity;

and determining all areas needing to be transferred with the sequence numbers behind the first target sequence number as the areas to be cut off.

Optionally, the determining module is further configured to: :

and determining all the areas needing to be transferred with the serial numbers before the second target serial number as the areas to be cut off.

Optionally, the power usage difference dynamic evaluation score is obtained based on at least one of a power usage dependency score, a blackout tolerance score, or a historical blackout score.

Optionally, the determining module is further configured to:

In the embodiment of the invention, the first total transfer load of a plurality of areas needing transfer at the transfer moment can be dynamically evaluated, and the first total transfer load obtained by evaluation can reflect the actual power load of each area needing transfer at the transfer moment, so that the problem of transfer capacity waste caused by capacity evaluation by adopting rated load can be avoided, and the utilization rate of transfer resources is improved. Later, when the redundant electric quantity corresponding to the interconnection switch is smaller than the first transfer load total quantity, the power utilization difference dynamic evaluation values of the power-transfer-required transformer areas at the transfer time can be obtained in advance, the transformer areas to be cut off are determined in the plurality of power-transfer-required transformer areas, so that the transformer areas to be cut off can be cut off, the interconnection switch is closed, and the transfer recovery is carried out on the power-transfer-required transformer areas except the transformer areas to be cut off in the plurality of power-transfer-required transformer areas.

Fig. 6 is a schematic diagram of a terminal device according to an embodiment of the present invention. As shown in fig. 6, the terminal device 6 of this embodiment includes: a processor 60, a memory 61 and a computer program 62 stored in said memory 61 and executable on said processor 60. The processor 60, when executing the computer program 62, implements the steps in the various power distribution network fault recovery method embodiments described above. Alternatively, the processor 60 implements the functions of the modules/units in the above-described device embodiments when executing the computer program 62.

Illustratively, the computer program 62 may be partitioned into one or more modules/units that are stored in the memory 61 and executed by the processor 60 to implement the present invention. The one or more modules/units may be a series of computer program instruction segments capable of performing specific functions, which are used to describe the execution of the computer program 62 in the terminal device 6. For example, the computer program 62 may be divided into an acquisition module, a determination module, and a control module, and the specific functions of each module are as follows:

the acquisition module is used for acquiring the total amount of the first transfer load of the plurality of areas needing transfer according to the historical electricity utilization load of the plurality of areas needing transfer and corresponding to the fault occurrence position when the fault occurrence position is not adjacent to the interconnection switch of the power distribution network;

the determining module is used for determining a station area to be cut in the plurality of station areas needing to be transferred according to the power utilization difference dynamic evaluation value of the pre-acquired station areas needing to be transferred at the transfer moment when the redundant power amount corresponding to the interconnection switch is smaller than the first transfer load total amount; the total amount of second transfer load of the transfer-required areas except the areas to be cut out in the plurality of transfer-required areas is less than or equal to the redundant electric quantity;

The terminal device 6 may be a desktop computer, a notebook, a palm computer, a cloud server, or other computing devices. The terminal device may include, but is not limited to, a processor 60, a memory 61. Those skilled in the art will appreciate that fig. 6 is merely an example of a terminal device 6, and does not constitute a limitation of the terminal device 6, and may include more or fewer components than those shown, or some of the components may be combined, or different components, e.g., the terminal device may also include an input-output device, a network access device, a bus, etc.

The Processor 60 may be a Central Processing Unit (CPU), other general purpose Processor, a Digital Signal Processor (DSP), an Application Specific Integrated Circuit (ASIC), a Field Programmable Gate Array (FPGA) or other Programmable logic device, discrete Gate or transistor logic, discrete hardware components, etc. A general purpose processor may be a microprocessor or the processor may be any conventional processor or the like.

The memory 61 may be an internal storage unit of the terminal device 6, such as a hard disk or a memory of the terminal device 6. The memory 61 may also be an external storage device of the terminal device 6, such as a plug-in hard disk, a Smart Media Card (SMC), a Secure Digital (SD) Card, a Flash memory Card (Flash Card), and the like, which are provided on the terminal device 6. Further, the memory 61 may also include both an internal storage unit and an external storage device of the terminal device 6. The memory 61 is used for storing the computer program and other programs and data required by the terminal device. The memory 61 may also be used to temporarily store data that has been output or is to be output.

It will be apparent to those skilled in the art that, for convenience and brevity of description, only the above-mentioned division of the functional units and modules is illustrated, and in practical applications, the above-mentioned function distribution may be performed by different functional units and modules according to needs, that is, the internal structure of the apparatus is divided into different functional units or modules to perform all or part of the above-mentioned functions. Each functional unit and module in the embodiments may be integrated in one processing unit, or each unit may exist alone physically, or two or more units are integrated in one unit, and the integrated unit may be implemented in a form of hardware, or in a form of software functional unit. In addition, specific names of the functional units and modules are only for convenience of distinguishing from each other, and are not used for limiting the protection scope of the present application. The specific working processes of the units and modules in the system may refer to the corresponding processes in the foregoing method embodiments, and are not described herein again.

In the above embodiments, the descriptions of the respective embodiments have respective emphasis, and reference may be made to the related descriptions of other embodiments for parts that are not described or illustrated in a certain embodiment.

Those of ordinary skill in the art will appreciate that the various illustrative elements and algorithm steps described in connection with the embodiments disclosed herein may be implemented as electronic hardware, or combinations of computer software and electronic hardware. Whether such functionality is implemented as hardware or software depends upon the particular application and design constraints imposed on the implementation. Skilled artisans may implement the described functionality in varying ways for each particular application, but such implementation decisions should not be interpreted as causing a departure from the scope of the present invention.

In the embodiments provided in the present invention, it should be understood that the disclosed apparatus/terminal device and method may be implemented in other ways. For example, the above-described embodiments of the apparatus/terminal device are merely illustrative, and for example, the division of the modules or units is only one type of logical function division, and other division manners may be available in actual implementation, for example, multiple units or components may be combined or integrated into another system, or some features may be omitted, or not executed. In addition, the shown or discussed mutual coupling or direct coupling or communication connection may be an indirect coupling or communication connection through some interfaces, devices or units, and may be in an electrical, mechanical or other form.

The units described as separate parts may or may not be physically separate, and parts displayed as units may or may not be physical units, may be located in one place, or may be distributed on a plurality of network units. Some or all of the units can be selected according to actual needs to achieve the purpose of the solution of the embodiment.

In addition, functional units in the embodiments of the present invention may be integrated into one processing unit, or each unit may exist alone physically, or two or more units are integrated into one unit. The integrated unit can be realized in a form of hardware, and can also be realized in a form of a software functional unit.

The integrated modules/units, if implemented in the form of software functional units and sold or used as separate products, may be stored in a computer readable storage medium. Based on such understanding, all or part of the flow of the method according to the embodiments of the present invention may also be implemented by a computer program, which may be stored in a computer-readable storage medium, and when the computer program is executed by a processor, the steps of the method embodiments may be implemented. Wherein the computer program comprises computer program code, which may be in the form of source code, object code, an executable file or some intermediate form, etc. The computer-readable medium may include: any entity or device capable of carrying the computer program code, recording medium, usb disk, removable hard disk, magnetic disk, optical disk, computer Memory, read-Only Memory (ROM), random Access Memory (RAM), electrical carrier wave signals, telecommunications signals, software distribution medium, and the like. It should be noted that the computer readable medium may contain content that is subject to appropriate increase or decrease as required by legislation and patent practice in jurisdictions, for example, in some jurisdictions, computer readable media does not include electrical carrier signals and telecommunications signals as is required by legislation and patent practice.

The above-mentioned embodiments are only used for illustrating the technical solutions of the present invention, and not for limiting the same; although the present invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; such modifications and substitutions do not depart from the spirit and scope of the embodiments of the present invention, and they should be construed as being included therein.

Claims

1. A power distribution network fault recovery method is characterized by comprising the following steps:

under the condition that the fault occurrence position is not adjacent to a contact switch of the power distribution network, acquiring a first transfer load total amount of a plurality of transfer-required distribution areas at the transfer moment according to historical electricity utilization load amounts of the plurality of transfer-required distribution areas corresponding to the fault occurrence position;

when the redundant electric quantity corresponding to the interconnection switch is smaller than the total first transfer load, determining a station area to be cut in the plurality of station areas needing transfer according to a power utilization difference dynamic evaluation score of the station areas needing transfer at the transfer moment, wherein the power utilization difference dynamic evaluation score is acquired in advance; wherein, the total amount of second transfer load of the transfer-required areas except the areas to be cut out in the plurality of transfer-required areas is less than or equal to the redundant electric quantity;

cutting off the to-be-cut transformer area, and closing the interconnection switch to perform switching recovery on the to-be-switched transformer area except the to-be-cut transformer area in the plurality of to-be-switched transformer areas;

performing secondary division on the electricity utilization grades of the users in the same grade based on the electricity utilization difference dynamic evaluation value, and preferentially recovering power supply transfer of the power station area with the secondary division and high electricity utilization grade based on the secondarily divided electricity utilization grades;

before determining a to-be-removed distribution area in the multiple distribution areas needing to be transferred according to the pre-obtained power utilization difference dynamic evaluation value of the distribution area needing to be transferred at the distribution moment, the method further comprises the following steps:

acquiring the electricity utilization dependence value, the power failure tolerance value and the historical power failure value of the area needing to be transferred at the transfer moment;

and determining the sum of the power utilization dependence score and the multiplication value of a first preset weight, the multiplication value of the power failure tolerance score and a second preset weight, and the multiplication value of the historical power failure score and a third preset weight as the power utilization difference dynamic evaluation score of the power-to-be-transferred station area at the power transfer time.

2. The method for recovering the fault of the power distribution network according to claim 1, wherein the obtaining a first total transfer load amount of the plurality of areas requiring transfer at the transfer time according to the historical electricity utilization load amounts of the plurality of areas requiring transfer corresponding to the fault occurrence position comprises:

estimating the transfer load quantity of each transfer-required platform area in the plurality of transfer-required platform areas at the transfer moment according to the historical electricity utilization load quantity;

and determining the sum of the transfer load amount of each transfer-required platform area in the plurality of transfer-required platform areas as the first transfer load total amount.

3. The method for recovering from a fault in an electric power distribution network according to claim 2, wherein estimating an amount of transfer load of each of the plurality of areas requiring transfer at the transfer time based on the historical amount of power consumption load comprises:

acquiring N electricity utilization load quantities of a target platform area in the same day before a fault occurs; the target transformer area is any one of the plurality of transformer areas needing to be transformed;

acquiring X electricity utilization load quantities before the transfer time in M days before the target transformer area and Y electricity utilization load quantities after the transfer time in M days before the target transformer area;

determining the maximum value of the N electric load quantities, the M multiplied by X electric load quantities and the M multiplied by Y electric load quantities as the power supply transfer electric load quantity of the target platform area at the power supply transfer time;

wherein M, N, X and Y are integers greater than zero.

4. The method for recovering the fault of the power distribution network according to claim 1, wherein the determining, according to the power utilization difference dynamic evaluation score of the power distribution network area needing to be transferred at the power transfer time, the power distribution network area to be removed from the power distribution network areas needing to be transferred comprises:

sequencing the plurality of areas needing to be transferred according to the sequence of the power utilization difference dynamic evaluation scores from small to large;

determining the transfer-required transformer area with the serial number as a first target serial number in the plurality of transfer-required transformer areas; the third total transfer load of all the areas needing to be transferred and provided with the sequence numbers behind the first target sequence number is less than or equal to the redundant electric quantity, and the fourth total transfer load of all the areas needing to be transferred and provided with the sequence numbers behind the first target sequence number and the areas needing to be transferred and provided with the sequence numbers behind the first target sequence number is greater than or equal to the redundant electric quantity;

and determining all the areas needing to be transferred and provided with serial numbers before the first target serial number and the areas needing to be transferred and provided with serial numbers as the first target serial number as the areas to be subjected to the removal of the power station.

5. The method for recovering the power distribution network fault according to claim 1, wherein the determining, according to the power utilization difference dynamic evaluation score of the power distribution network area needing to be transferred at the transfer time, the power distribution network area to be removed from the plurality of power distribution network areas needing to be transferred comprises:

sequencing the plurality of areas needing to be transferred according to the sequence of the power utilization difference dynamic evaluation values from large to small;

determining the region needing to be transferred with the serial number of a second target serial number in the plurality of regions needing to be transferred; the total fifth transfer load of all the areas needing to be transferred and provided with the sequence numbers before the second target sequence number is less than or equal to the redundant electric quantity, and the total sixth transfer load of all the areas needing to be transferred and provided with the sequence numbers before the second target sequence number and the areas needing to be transferred and provided with the sequence numbers before the second target sequence number is greater than or equal to the redundant electric quantity;

and determining all the areas needing to be transferred and provided with the sequence numbers behind the second target sequence number and the areas needing to be transferred and provided with the sequence numbers as the second target sequence number as the areas needing to be removed.

6. The power distribution network fault recovery method according to claim 1, wherein the power utilization dependence score is obtained based on a corresponding relationship between a difference value between a maximum power utilization load and a minimum power utilization load of the power distribution area needing to be transferred on a previous day and a power utilization load of the power distribution area needing to be transferred at the power transfer time;

the power failure tolerance score is obtained based on the corresponding relation between the average complaint times and the average complaint interval of the transformer area needing to be transferred;

and the historical power failure score is obtained based on the corresponding relation between the power failure times of the power supply area needing to be transferred in a preset time period and the total power failure number of the whole line.

7. A power distribution network fault recovery device, comprising:

the determining module is used for determining a to-be-cut power distribution area in a plurality of power distribution areas needing to be transferred according to the power utilization difference dynamic evaluation value of the power distribution areas needing to be transferred at the power distribution moment, which is obtained in advance, when the redundant power quantity corresponding to the interconnection switch is smaller than the total first power distribution load quantity; the total amount of second transfer load of the transfer-required areas except the areas to be cut out in the plurality of transfer-required areas is less than or equal to the redundant electric quantity; performing secondary power utilization grade division on users of the same grade based on the power utilization difference dynamic evaluation score;

the control module is used for cutting off the areas to be cut off and closing the contact switch so as to carry out switching recovery on the areas to be switched except the areas to be cut off in the plurality of areas to be switched; based on the secondarily-divided power utilization level, preferentially recovering power supply transfer of the station area with the secondarily-divided power utilization level;

before determining a region to be removed from the multiple regions to be transferred according to the power utilization difference dynamic evaluation score of the pre-acquired region to be transferred at the transfer time, the method further includes:

acquiring the electricity utilization dependence value, the power failure tolerance value and the historical power failure value of the region needing to be transferred at the transfer moment;

and determining the sum of the power utilization dependence score and the multiplication value of a first preset weight, the multiplication value of the power failure tolerance score and a second preset weight, and the multiplication value of the historical power failure score and a third preset weight as the power utilization difference dynamic evaluation score of the area needing to be transferred at the transfer time.

8. A terminal device comprising a memory, a processor and a computer program stored in the memory and executable on the processor, characterized in that the processor realizes the steps of the method according to any of claims 1 to 6 when executing the computer program.