Adaptive replacement method and equipment for heavy overload of distribution transformer

Abstract

The invention relates to an adaptive replacement method for heavy overload of a distribution transformer. The method comprises the following steps: obtaining annual maximum load data, to-be-solved heavy overload distribution transformer information and adaptive distribution transformer information for replacing the to-be-solved heavy overload distribution transformer information in a power supply area; screening out first-level replaceable distribution transformer information from the adaptive distribution transformer information according to an adaptive constraint value; the distribution transformer capacity in the initial replaceable distribution transformer information is selected to be larger than the distribution transformer capacity of the to-be-solved heavy and overload distribution transformer information, and second-level replaceable distribution transformer information is obtained; and determining final replacement distribution transformer information for replacing the to-be-solved heavy and overload distribution transformer information in the secondary replaceable distribution transformer information according to the maximum load rate of the distribution transformer. According to the technical scheme of the invention, under the condition that the investment fund of a power grid company is limited, the adaptive and replaced distribution transformer does not have heavy overload, and the distribution transformer participating in adaptive replacement in subsequent load increase and within a certain period of time does not have the heavy overload problem.

Description

Technical Field

[0001] The present invention relates to the field of electric power, and in particular to a method, system, readable storage medium and computer equipment for adapting and replacing heavy overload distribution transformers. Background Art

[0002] Distribution transformers (abbreviated as "distribution transformers") are vital equipment in the power system, responsible for transmitting electrical energy from the high-voltage power grid to the low-voltage user end. However, in actual operation, distribution transformers often face the problem of heavy overload, that is, the load exceeds its rated capacity. It may be caused by a variety of factors, such as load growth, equipment aging, poor operating conditions, etc. Distribution transformer heavy overload causes equipment overheating, reduced energy efficiency, and may even cause equipment failure and safety accidents. The phenomenon of heavy overload of distribution transformers directly affects the power supply reliability of the distribution network. Therefore, effective management of heavy overload of distribution transformers is one of the important tasks of power system operation and maintenance.

[0003] In view of the problem of heavy overload of distribution transformers in distribution networks, there are several existing technical solutions:

[0004] Technical solution 1. Application of energy storage technology:

[0005] Use energy storage devices to solve the problem of heavy overload of distribution transformers. For example, install battery energy storage devices on the low-voltage side of distribution transformers, balance the load through the charging and discharging capacity of the energy storage devices, and reduce the heavy overload of distribution transformers.

[0006] Comparative Document 1: Distribution Transformer Overload Adaptive Control Method and System Based on Mobile Energy Storage - CN202310682019.8;

[0007] Technical solution 2. Capacity increase and new construction of distribution transformers:

[0008] The problems of heavy distribution transformers and overload caused by load growth can be solved through measures such as increasing the capacity of distribution transformers, adding new distribution transformer locations, and cutting loads.

[0009] Comparative Document 2: Zhang Yixuan, Tian Zhitong, Yang Bochao, et al. Research on rolling optimization strategy of photovoltaic reverse overload area considering dynamic capacity increase limitation [J / OL]. High Voltage Technology;

[0010] Comparative Document 3: Yao Wei. Prevention and Control Methods of Heavy Overload and Three-phase Unbalance of Distribution Transformer[J]. Yunnan Electric Power Technology, 2023, 51(06): 67-69;

[0011] Technical Solution 3. Load Management and Adjustment:

[0012] Reduce the load through load management, such as limiting electricity consumption and properly arranging load peaks, thereby alleviating the pressure caused by heavy overload;

[0013] Comparative document 4: Distribution transformer load optimization method and electronic equipment-CN202110914415.X; A distributed flexible resource coordination control method-CN202211309109.4.

[0014] Technical solution 4. Distribution transformer replacement:

[0015] For distribution transformers that are severely overloaded, reasonable replacement operations can be performed to optimize the grid structure, reduce the distribution transformer load, and ensure the safe and stable operation of the grid.

[0016] Comparative Document 5: Distribution transformer replacement decision method and device - CN202010687678.7.

[0017] The technical defects of Technical Solution 1 are: (1) It seriously affects economic efficiency. This technical solution requires additional equipment investment, such as adding energy storage equipment; (2) The optimal management of energy storage charging and discharging also requires the investment of algorithm resources; (3) There is no clear plan on how to configure the capacity of energy storage equipment.

[0018] The technical defects of Technical Solution 2 are: (1) Poor economic efficiency. The traditional methods of increasing the capacity of distribution transformers or adding new distribution transformers and cutting loads have high economic costs and require a large capital investment. The method of cutting loads is affected by factors such as the power supply radius, making this method difficult to implement in practice. (2) There is a lack of optimization solutions for the size of capacity increase or the location of distribution points.

[0019] Technical Solution 3: Load management and adjustment measures (1) impose constraints on users’ electricity consumption, seriously affecting the quality and reliability of power supply; (2) adjust the peak value of the load, limit electricity consumption, etc.

[0020] Technical Solution 4 Distribution Transformer Replacement. Comparative Document [5] discloses a distribution transformer heavy overload replacement decision technology, specifically: determining the heavy overload distribution transformers and spare distribution transformers in the target area; formulating a replacement strategy for the heavy overload distribution transformers; establishing a strategy target value for evaluating the replacement strategy; arranging and combining different replacement strategies to obtain a replacement strategy group including replacement strategies with different rankings, and simulating the replacement of the heavy overload distribution transformer according to the replacement strategy group; calculating the strategy target values ​​corresponding to the replacement strategy groups with different rankings, determining the optimal ranking of the replacement strategies according to the strategy target values, and determining the optimal ranking as the optimal decision plan for replacing the heavy overload distribution transformer.

[0021] This technology requires evaluating the strategic target value of the switching strategy and arranging and combining different switching strategies. (1) The arrangement and combination technology is relatively complicated for operation and maintenance personnel. (2) The optimal order of the switching strategies is determined according to the strategic target value. In this technology, if the strategic target value changes, the optimal order of the switching strategies will also change. Therefore, there is subjectivity caused by the strategic target value that varies from person to person. (3) The public technology cannot avoid the problem of new heavy overload caused by load development after the distribution transformer is replaced. Summary of the invention

[0022] The present invention aims to solve at least one of the technical problems existing in the prior art or related art.

[0023] To this end, the purpose of the present invention is to provide a method and device for adapting and replacing heavy overload distribution transformers, which can solve the problems of high management cost and complex optimization existing in traditional distribution transformer heavy overload management measures.

[0024] To achieve the above object, the technical solution of the first aspect of the present invention provides a distribution transformer heavy overload adaptation replacement method, comprising the following steps:

[0025] Acquire annual maximum load data in the power supply area, heavily overloaded distribution transformer information to be resolved, and adapted distribution transformer information for replacing the heavily overloaded distribution transformer information to be resolved;

[0026] Filtering out first-level replaceable distribution transformer information from the adaptive distribution transformer information according to the adaptation constraint value;

[0027] Selecting a distribution transformer capacity in the initial replaceable distribution transformer information that is larger than the distribution transformer capacity of the heavily overloaded distribution transformer information to be resolved, and obtaining secondary replaceable distribution transformer information;

[0028] Final replacement distribution transformer information for replacing the to-be-solved heavily overloaded distribution transformer information is determined in the secondary replaceable distribution transformer information according to the maximum load rate of the distribution transformer.

[0029] In the above technical solution, preferably, the heavily overloaded distribution transformer information to be resolved and the adapted distribution transformer information both include distribution transformer capacity, installation location, cooling method, active power and annual maximum load rate.

[0030] In any of the above technical solutions, preferably, selecting the first-level replaceable distribution transformer information from the adapted distribution transformer information according to the adaptation constraint parameter includes:

[0031] The average annual growth rate of the load in the power supply area is calculated based on the annual maximum load data, and the expression is: Among them, p a is the maximum load data of this year, p a-p For p a The maximum load data of the previous year, β is the average annual growth rate of load;

[0032] The adaptation constraint value is calculated according to the average annual growth rate of the load, and the expression is: α limit ×(1+β) r <80%, where r is the minimum number of years required to operate after replacement.

[0033] In the above technical solution, preferably, the expression of the maximum load rate of the distribution transformer is: Among them, p n，t is the active power of the nth heavily overloaded distribution transformer to be solved at time t, S n is the capacity of the nth distribution transformer with heavy overload to be solved, n=1, 2, ..., N, and N is the number of distribution transformers with heavy overload to be solved;

[0034] The expression of the final replacement distribution transformer information is: and Among them, S k is the capacity of the distribution transformer in the adaptive distribution transformer information, k=1, 2, ..., K, and K is the number of adaptive distribution transformers.

[0035] The technical solution of the second aspect of the present invention provides a distribution transformer heavy overload adaptation replacement system, comprising the following steps:

[0036] An acquisition module is configured to acquire annual maximum load data in a power supply area, information on heavy overload distribution transformers to be resolved, and adapted distribution transformer information for replacing the heavy overload distribution transformer information to be resolved;

[0037] A first-level adaptation module is configured to filter out first-level replaceable distribution transformer information from the adaptation distribution transformer information according to the adaptation constraint value;

[0038] A secondary adaptation module is configured to select a distribution transformer capacity in the initial replaceable distribution transformer information that is larger than the distribution transformer capacity of the heavily overloaded distribution transformer information to be resolved, and obtain secondary replaceable distribution transformer information;

[0039] The final adaptation module is configured to determine, in the secondary replaceable distribution transformer information, final replacement distribution transformer information for replacing the to-be-solved heavily overloaded distribution transformer information according to the maximum load rate of the distribution transformer.

[0040] In the above technical solution, preferably, the heavily overloaded distribution transformer information to be resolved and the adapted distribution transformer information both include distribution transformer capacity, installation location, cooling method, active power and annual maximum load rate.

[0041] In any of the above technical solutions, preferably, the first-level adaptation module includes:

[0042] The load annual average growth calculation unit is configured to calculate the load annual average growth rate of the power supply area according to the annual maximum load data, and the expression is: Among them, p a is the maximum load data of this year, p a-p For p a The maximum load data of the previous year, β is the average annual growth rate of load;

[0043] The adaptation constraint calculation unit is configured to calculate the adaptation constraint value according to the average annual growth rate of the load, and the expression is: α limit ×(1+β) r <80%, where r is the minimum number of years required to operate after replacement.

[0044] In the above technical solution, preferably, the expression of the maximum load rate of the distribution transformer is: Among them, p n，t is the active power of the nth heavily overloaded distribution transformer to be solved at time t, S n is the capacity of the nth distribution transformer with heavy overload to be solved, n=1, 2, ..., N, and N is the number of distribution transformers with heavy overload to be solved;

[0045] The expression of the final replacement distribution transformer information is: and Among them, S k is the capacity of the distribution transformer in the adaptive distribution transformer information, k=1, 2, ..., K, and K is the number of adaptive distribution transformers.

[0046] The technical solution of the third aspect of the present invention provides a readable storage medium on which a computer program is stored. When the program is executed by a processor, the steps of the adaptive replacement method for distribution transformer overload provided by the technical solution of the first aspect are implemented.

[0047] The technical solution of the fourth aspect of the present invention provides a computer device, including a storage medium and a processor; the storage medium is used to store a computer program; the processor is used to execute the computer program to implement the steps of the adaptation and replacement method for distribution transformer heavy overload provided by the technical solution of the first aspect above.

[0048] Compared with the prior art, the advantages of the adaptation and replacement method and equipment for distribution transformer heavy overload provided by the present invention are: when the investment funds of the power grid company are limited, the adaptation and replacement method proposed in the present invention is used to solve the problem of heavy overload of distribution transformers, so that the distribution transformer being adapted and replaced will not be heavily overloaded, and the distribution transformer participating in the adaptation and replacement will not be heavily overloaded during the subsequent load growth and within a certain number of years; it can effectively solve the problem of heavy overload of distribution transformers and, to a certain extent, solve the problem of light load of distribution transformers. BRIEF DESCRIPTION OF THE DRAWINGS

[0049] The above and / or additional aspects and advantages of the present invention will become apparent and easily understood from the description of the embodiments in conjunction with the following drawings, in which:

[0050] Figure 1 A flowchart of an adaptation and replacement method according to an embodiment of the present invention is shown;

[0051] Figure 2 A flowchart of step S2 according to an embodiment of the present invention is shown;

[0052] Figure 3 A structural block diagram of an adaptation and replacement system involved in an embodiment of the present invention is shown;

[0053] Figure 4 The structure block diagram of the first-level adaptation module involved in the embodiment of the present invention is shown. DETAILED DESCRIPTION

[0054] In order to more clearly understand the above-mentioned purpose, features and advantages of the present invention, the present invention is further described in detail below in conjunction with the accompanying drawings and specific embodiments. It should be noted that the embodiments of the present application and the features in the embodiments can be combined with each other without conflict.

[0055] In the following description, many specific details are set forth to facilitate a full understanding of the present invention. However, the present invention may also be implemented in other ways different from those described herein. Therefore, the protection scope of the present invention is not limited to the specific embodiments disclosed below.

[0056] like Figure 1 As shown, according to an embodiment of the present invention, a method for adapting and replacing a heavy overload distribution transformer includes the following steps:

[0057] S1, obtaining annual maximum load data in the power supply area, information on heavy overload distribution transformers to be resolved, and adaptive distribution transformer information used to replace the heavy overload distribution transformer information to be resolved;

[0058] In this step, information about the heavily overloaded distribution transformers to be resolved in the power supply area is collected, including:

[0059] (1) The set of heavily overloaded distribution transformers to be solved is denoted as A n (n=1, 2, ..., N);

[0060] (2) The number of heavily overloaded distribution transformers to be resolved is denoted by N.

[0061] (3) Heavy overload distribution transformer capacity S to be solved n (n=1,2,...,N), unit is kVA.

[0062] (4) Installation location of the heavily overloaded distribution transformer to be resolved n，i (i=1, 2, 3), specifically, X n，1 Indicates that the installation location of the nth heavily overloaded distribution transformer to be solved is the distribution room, Xn，2 Indicates that the nth heavy overload distribution transformer to be solved is installed on the column; X n，s Indicates that the nth heavily overloaded distribution transformer to be solved is installed in the cabinet;

[0063] (5) Cooling method Y for heavily overloaded distribution transformer to be solved n，j (j=1, 2), Y n，1 Indicates that the nth heavy overload distribution unit to be solved is changed to oil-immersed type, Y n，2 It means that the nth heavy overload distribution to be resolved has been changed to dry type.

[0064] (6) Active power of the heavily overloaded distribution transformer to be resolved, denoted as P n，t , unit is kW, t is the collection time.

[0065] Collect information about distribution transformers in the adapter library within the power supply area, including:

[0066] (1) The distribution transformer set is denoted as B k (k = 1, 2, ..., K)

[0067] (2) Number of distribution transformers, denoted as K.

[0068] (3) Distribution transformer capacity S k (k=1, 2, ..., K), kVA.

[0069] (4) Installation location of distribution transformer X k，i (i=1, 2, 3), specifically, X k，1 represents that the installation location of the kth distribution transformer is the distribution room, X k，2 represents the kth distribution transformer installed on the column; X k，3 Represents the kth distribution transformer installed in the cabinet;

[0070] (5) Cooling method Y of distribution transformer k，j (j=1, 2), Y k，1 Indicates that the kth distribution unit becomes oil-immersed, Y k，2 Indicates that the kth distribution unit has become dry type.

[0071] (6) Distribution transformer annual maximum load factor α k .

[0072] S2, filtering out first-level replaceable distribution transformer information from the adapted distribution transformer information according to the adaptation constraint value;

[0073] S3, selecting a distribution transformer capacity in the initial replaceable distribution transformer information that is larger than the distribution transformer capacity of the heavily overloaded distribution transformer information to be resolved, and obtaining secondary replaceable distribution transformer information;

[0074] S4, determining final replacement distribution transformer information for replacing the heavily overloaded distribution transformer information to be resolved from the secondary replaceable distribution transformer information according to the maximum load rate of the distribution transformer.

[0075] In the above embodiment, preferably, the heavily overloaded distribution transformer information to be resolved and the adapted distribution transformer information both include distribution transformer capacity, installation location, cooling method, active power and annual maximum load rate.

[0076] like Figure 2 As shown, in any of the above embodiments, preferably, S2, filtering out the first-level replaceable transformer information from the adapted transformer information according to the adaptation constraint parameter, includes:

[0077] S21, calculating the average annual growth rate of the load in the power supply area according to the annual maximum load data, the expression is: Among them, p a is the maximum load data of this year, p a-p For p a The maximum load data of the previous year, β is the average annual growth rate of load;

[0078] S22, calculating the adaptation constraint value according to the average annual growth rate of the load, the expression is: α limit ×(1+β) r <80%, where r is the minimum number of years required to operate after replacement, which is determined by the operation and maintenance department of the power grid company. For example, r=5, which means that the distribution transformer after adaptation replacement will not be overloaded in the next 5 years when the annual load growth is β;

[0079] The main purpose of this step is to avoid new heavy overload problems caused by load growth in the power supply area of ​​the distribution transformer within a short period of time after the distribution transformer is adapted and replaced.

[0080] In the above embodiment, preferably, the expression of the maximum load rate of the distribution transformer is: Among them, p n，t is the active power of the nth heavily overloaded distribution transformer to be solved at time t, S n is the capacity of the nth heavily overloaded distribution transformer to be solved, n=1, 2, ..., N, N is the number of heavily overloaded distribution transformers to be solved; T is all the time in a year, for example, a 10kV distribution transformer collects information every 15 minutes, then information is collected 96 times a day, and the information collected in a year is T=96×365 (or 366) times.

[0081] The expression of the final replacement distribution transformer information is: and Among them, S k is the capacity of the distribution transformer in the adaptive distribution transformer information, k=1, 2, ..., K, and K is the number of adaptive distribution transformers.

[0082] In this step, the distribution transformer capacity is adapted from k=1 to K. If the distribution transformer capacity in the initial replaceable distribution transformer information is greater than the distribution transformer capacity of the heavily overloaded distribution transformer information to be solved (S k >S n ), the installation location and cooling method of the distribution transformer are adapted as follows:

[0083] {X n，i =X k，i And Y n，i =Y k，i}, where n=1, 2, ..., N, k=1, 2, ..., K.

[0084] The purpose of this step is: to replace the distribution transformer, the consistency of the installation location and cooling method of the distribution transformer must be ensured first. For example, if the heavily overloaded distribution transformer to be solved is a box-type transformer or a dry-type transformer, it can only be adapted from the box-type transformer and dry-type distribution transformer range in the adaptation library to see if there is one that meets the load rate requirements; it cannot be adapted from the distribution transformer in the distribution room, the pole-mounted distribution transformer, or the oil-immersed distribution transformer.

[0085] like Figure 3 As shown, according to another embodiment of the present invention, a distribution transformer overload adaptation and replacement system 100 includes the following steps:

[0086] An acquisition module 10 is configured to acquire annual maximum load data in a power supply area, information on heavily overloaded distribution transformers to be resolved, and adapted distribution transformer information for replacing the heavily overloaded distribution transformer information to be resolved;

[0087] The first-level adaptation module 20 is configured to filter out the first-level replaceable distribution transformer information from the adaptation distribution transformer information according to the adaptation constraint value;

[0088] The secondary adaptation module 30 is configured to select a distribution transformer capacity in the initial replaceable distribution transformer information that is larger than the distribution transformer capacity of the heavily overloaded distribution transformer information to be resolved, and obtain secondary replaceable distribution transformer information;

[0089] The final adaptation module 40 is configured to determine, in the secondary replaceable distribution transformer information, final replacement distribution transformer information for replacing the to-be-solved heavily overloaded distribution transformer information according to the maximum load rate of the distribution transformer.

[0090] In the above embodiment, preferably, the heavily overloaded distribution transformer information to be resolved and the adapted distribution transformer information both include distribution transformer capacity, installation location, cooling method, active power and annual maximum load rate.

[0091] like Figure 4 As shown, in any of the above embodiments, preferably, the first-level adaptation module 20 includes:

[0092] The load annual average growth calculation unit 21 is configured to calculate the load annual average growth rate of the power supply area according to the annual maximum load data, and the expression is: Among them, p a is the maximum load data of this year, p a-p For p a The maximum load data of the previous year, β is the average annual growth rate of load;

[0093] The adaptation constraint calculation unit 22 is configured to calculate the adaptation constraint value according to the average annual growth rate of the load, and the expression is: α limit ×(1+β) r <80%, where r is the minimum number of years required to operate after replacement.

[0094] In the above embodiment, preferably, the expression of the maximum load rate of the distribution transformer is: Among them, p n，t is the active power of the nth heavily overloaded distribution transformer to be solved at time t, S n is the capacity of the nth distribution transformer with heavy overload to be solved, n=1, 2, ..., N, and N is the number of distribution transformers with heavy overload to be solved;

[0095] The expression of the final replacement distribution transformer information is: and Among them, S k is the capacity of the distribution transformer in the adaptive distribution transformer information, k=1, 2, ..., K, and K is the number of adaptive distribution transformers.

[0096] [Actual example]

[0097] Taking the distribution transformer of a power supply station as an example, the power supply station has N=3 distribution transformers with heavy overload, as shown in Table 1:

[0098] Table 1

[0099]

[0100] The annual maximum load rate of the three heavily overloaded distribution transformers to be solved can be calculated from Table 1:

[0101] Distribution transformer A1:

[0102] Distribution transformer A2:

[0103] Distribution transformer A3:

[0104] It is known that there are K=10 distribution transformers in the adapter library in the area where the power supply station is located, and the information is as follows in Table 2:

[0105] Table 2

[0106]

[0107]

[0108] In Table 2, distribution transformers B5 and B10 are lightly loaded.

[0109] The maximum load P in this region this year (2023) a =387MW, the maximum load in the region 4 years ago (2019) P a-4 =320MW.

[0110] Calculate the load growth rate:

[0111]

[0112] The planned operating period is r = 5 years.

[0113] Substituting into the adaptation constraint value formula, we have:

[0114] α limit ×(1+4.86%) 5 <80%;

[0115] Calculate α limit =63.1%;

[0116] In this example, the total number of transformers in the adaptation library is K = 10, so starting from k = 1, adaptation is performed one by one until the Kth transformer. The process is as follows:

[0117]

Heavy overload distribution transformer A1

[0118] The capacity S1 of the heavily overloaded distribution transformer A1 is 200. The capacities of the 10 distribution transformers in the adaptation library are all greater than 200kVA, and all satisfy Formula 4. The installation location and cooling method of the distribution transformer are adapted. The installation location and cooling method of the heavily overloaded distribution transformer A1 are respectively column-mounted oil-immersed. Among the 10 distribution transformers in the adaptation library, B2, B8, and B10 meet the requirements.

[0119] Furthermore, the expression of the final replacement distribution transformer information is used for B2, B8, and B10 to adapt the load factor of the distribution transformer after replacement.

[0120] B2: Therefore B2 is not suitable.

[0121] B8: Therefore, B8 is not suitable either.

[0122] B10:

[0123] Therefore B10 is suitable.

[0124]

Heavy overload distribution transformer A2

[0125] The capacity S2=315 of the heavily overloaded distribution transformer A2. Among the 10 distribution transformers in the adaptation library, except B9, the capacities of the other distribution transformers are all greater than 315kVA. The installation location and cooling method of the distribution transformers are adapted for B1, B2, B3, B4, B5, B6, B7, B8, and B10. The installation location and cooling method of the heavily overloaded distribution transformer A2 are oil-immersed in the distribution room, respectively. The distribution transformers B1 and B5 in the adaptation library meet the requirements.

[0126] Furthermore, the expression of the final replacement distribution transformer information is used for B1 and B5 to adapt the load factor of the distribution transformer after replacement and swapping.

[0127] B1:

[0128]

[0129] Therefore B1 is not suitable.

[0130] B5:

[0131]

[0132] Therefore B5 is suitable.

[0133]

Heavy overload distribution transformer A3

[0134] The capacity S3=400 of the heavily overloaded distribution transformer A3. Among the 10 distribution transformers in the adaptation library, the capacities of B3, B4, B6 and B7 are all greater than 400kVA. The installation location and cooling method of the distribution transformers are adapted for B3, B4, B6 and B7. The installation location and cooling method of the heavily overloaded distribution transformer A3 are dry type in the distribution room, respectively. The distribution transformers B4, B6 and B7 in the adaptation library meet the requirements.

[0135] Furthermore, the expression of the final replacement distribution transformer information is used for B4, B6 and B7 to adapt the load rate of the distribution transformer after replacement and swapping.

[0136] B4: Therefore B4 is not suitable.

[0137] B6: Therefore B6 is not suitable.

[0138] B7: Therefore B7 is not suitable.

[0139] Output the list of 2 distribution transformers that meet the adaptation conditions B = {B 10 , B5}

[0140] The output of the adapter library’s transformer information: The adapter transformer of A1 is B 10 , the A2 distribution transformer is adapted to B5

[0141] A3 distribution transformer has no adapter. It is recommended to increase capacity or add new points.

[0142] Based on the above Figure 1 and Figure 2 The method shown, accordingly, an embodiment of the present application also provides a computer-readable storage medium, on which a computer program is stored, and when the program is executed by a processor, the steps of the adaptive replacement method for distribution transformer overload in any of the above embodiments are implemented.

[0143] Based on this understanding, the technical solution of the present application can be embodied in the form of a software product, which can be stored in a non-volatile storage medium (which can be a CD-ROM, USB flash drive, mobile hard disk, etc.), including a number of instructions for enabling a computer device (which can be a personal computer, server, or network device, etc.) to execute the methods of various implementation scenarios of the present application.

[0144] Based on the above Figure 1 and Figure 2 The method shown, and Figure 3 and Figure 4 The virtual device embodiment shown, in order to achieve the above-mentioned purpose, the embodiment of the present application also provides a computer device, including a storage medium and a processor; the storage medium is used to store a computer program; the processor is used to execute the computer program to implement the steps of the adaptation and replacement method for distribution transformer overload in any of the above-mentioned embodiments.

[0145] Optionally, the computer device may further include a user interface, a network interface, a camera, a radio frequency (RF) circuit, a sensor, an audio circuit, a WI-FI module, etc. The user interface may include a display, an input unit such as a keyboard, etc., and the optional user interface may also include a USB interface, a card reader interface, etc. The network interface may optionally include a standard wired interface, a wireless interface (such as a Bluetooth interface, a WI-FI interface), etc.

[0146] Those skilled in the art will appreciate that the computer device structure provided in this embodiment does not limit the computer device, and may include more or fewer components, or a combination of certain components, or different component arrangements.

[0147] The storage medium may also include an operating system and a network communication module. The operating system is a program that manages and saves the hardware and software resources of the computer device, and supports the operation of information processing programs and other software and / or programs. The network communication module is used to realize communication between the components inside the storage medium, and communication with other hardware and software in the physical device.

[0148] In the present invention, the terms "first", "second", and "third" are used for descriptive purposes only and should not be understood as indicating or implying relative importance; the term "plurality" refers to two or more, unless otherwise clearly defined. The terms "installed", "connected", "connected", "fixed", etc. should be understood in a broad sense. For example, "connected" can be a fixed connection, a detachable connection, or an integral connection; "connected" can be a direct connection or an indirect connection through an intermediate medium. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0149] In the description of the present invention, it is necessary to understand that the directions or positional relationships indicated by terms such as “upper”, “lower”, “left”, “right”, “front” and “back” are based on the directions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or unit referred to must have a specific direction, be constructed and operated in a specific orientation, and therefore, cannot be understood as a limitation on the present invention.

[0150] In the description of this specification, the description of the terms "one embodiment", "some embodiments", "specific embodiments", etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

[0151] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A method for adapting and replacing a heavy overload distribution transformer, characterized in that: The following steps are involved: Acquire annual maximum load data in the power supply area, heavily overloaded distribution transformer information to be resolved, and adapted distribution transformer information for replacing the heavily overloaded distribution transformer information to be resolved; Filtering out first-level replaceable distribution transformer information from the adaptive distribution transformer information according to the adaptation constraint value; Selecting a distribution transformer capacity in the initial replaceable distribution transformer information that is larger than the distribution transformer capacity of the heavily overloaded distribution transformer information to be resolved, and obtaining secondary replaceable distribution transformer information; Final replacement distribution transformer information for replacing the to-be-solved heavily overloaded distribution transformer information is determined in the secondary replaceable distribution transformer information according to the maximum load rate of the distribution transformer.

2. The adaptation and replacement method for heavy overload of distribution transformer according to claim 1 is characterized in that: The heavily overloaded distribution transformer information to be resolved and the adapted distribution transformer information both include distribution transformer capacity, installation location, cooling method, active power and annual maximum load rate.

3. The adaptation and replacement method for heavy overload of distribution transformer according to claim 1 or 2, characterized in that: The first-level replaceable distribution transformer information is screened out from the adapted distribution transformer information according to the adaptation constraint parameter, including: The average annual growth rate of the load in the power supply area is calculated based on the annual maximum load data, and the expression is: Among them, p a is the maximum load data of this year, p a-p For p a The maximum load data of the previous year, β is the average annual growth rate of load; The adaptation constraint value is calculated according to the average annual growth rate of the load, and the expression is: α limit ×(1+β) r <80%, where r is the minimum number of years required to operate after replacement.

4. The method for adapting and replacing a heavy overload distribution transformer according to claim 3, characterized in that: The expression of the maximum load rate of the distribution transformer is: Among them, p n，t is the active power of the nth heavily overloaded distribution transformer to be solved at time t, S n is the capacity of the nth distribution transformer with heavy overload to be solved, n=1, 2, ..., N, and N is the number of distribution transformers with heavy overload to be solved; The expression of the final replacement distribution transformer information is: and Among them, S k is the capacity of the distribution transformer in the adaptive distribution transformer information, k=1, 2, ..., K, and K is the number of adaptive distribution transformers.

5. An adaptation and replacement system for heavy overload of distribution transformer, characterized in that: The following steps are involved: An acquisition module is configured to acquire annual maximum load data in a power supply area, information on heavy overload distribution transformers to be resolved, and adapted distribution transformer information for replacing the heavy overload distribution transformer information to be resolved; A first-level adaptation module is configured to filter out first-level replaceable distribution transformer information from the adaptation distribution transformer information according to the adaptation constraint value; A secondary adaptation module is configured to select a distribution transformer capacity in the initial replaceable distribution transformer information that is larger than the distribution transformer capacity of the heavily overloaded distribution transformer information to be resolved, and obtain secondary replaceable distribution transformer information; The final adaptation module is configured to determine, in the secondary replaceable distribution transformer information, final replacement distribution transformer information for replacing the to-be-solved heavily overloaded distribution transformer information according to the maximum load rate of the distribution transformer.

6. The adaptation and replacement system for heavy overload of distribution transformer according to claim 5, characterized in that: The heavily overloaded distribution transformer information to be resolved and the adapted distribution transformer information both include distribution transformer capacity, installation location, cooling method, active power and annual maximum load rate.

7. The adaptation and replacement system for heavy overload of distribution transformer according to claim 5 or 6, characterized in that: The first-level adapter module includes: The load annual average growth calculation unit is configured to calculate the load annual average growth rate of the power supply area according to the annual maximum load data, and the expression is: Among them, p a is the maximum load data of this year, p a-p For p a The maximum load data of the previous year, β is the average annual growth rate of load; The adaptation constraint calculation unit is configured to calculate the adaptation constraint value according to the average annual growth rate of the load, and the expression is: α limit ×(1+β) r <80%, where r is the minimum number of years required to operate after replacement.

8. The adaptation and replacement system for heavy overload of distribution transformer according to claim 7, characterized in that: The expression of the maximum load rate of the distribution transformer is: Among them, p n，t is the active power of the nth heavily overloaded distribution transformer to be solved at time t, S n is the capacity of the nth distribution transformer with heavy overload to be solved, n=1, 2, ..., N, and N is the number of distribution transformers with heavy overload to be solved; The expression of the final replacement distribution transformer information is: and Among them, S k is the capacity of the distribution transformer in the adaptive distribution transformer information, k=1, 2, ..., K, and K is the number of adaptive distribution transformers.

9. A readable storage medium, characterized in that: A computer program is stored thereon, and when the program is executed by a processor, the steps of the method for adaptive replacement of a distribution transformer overload as claimed in any one of claims 1 to 4 are implemented.

10. A computer device, characterized in that: The invention comprises a storage medium and a processor; the storage medium is used to store a computer program; the processor is used to execute the computer program to implement the steps of the method for adapting and replacing a distribution transformer overload as claimed in any one of claims 1 to 4.

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