A distribution transformer gear adjustment method, system, terminal and storage medium

Abstract

The present invention relates to a distribution transformer gear adjustment method, system, terminal and storage medium, belonging to the field of power system node voltage operation management, the method comprises obtaining a low-voltage outlet voltage value curve, a total number of gears, a transformation ratio of each gear, a transformation ratio of a current gear, and an outlet bus voltage value curve of a transformer of a superior substation of the transformer to be adjusted in a distribution station, according to the total number of gears of the transformer to be adjusted in the distribution station, the transformation ratio of each gear and the transformation ratio of the current gear, and the outlet bus voltage value curve of the transformer of the superior substation, a group of low-voltage outlet voltage critical value curves for adjusting the gear of the transformer to be adjusted in the distribution station are calculated, the low-voltage outlet voltage value curve is compared with each low-voltage outlet voltage critical value curve, and the gear adjustment of the transformer to be adjusted in the distribution station is determined. The method is simple to calculate, does not require operating parameters such as current and resistance, and avoids the work of collecting wire models, lengths, etc.

Description

Technical Field

[0001] The present invention relates to the technical field of power system node voltage operation management, and in particular to a distribution transformer gear adjustment method, system, terminal and storage medium. Background Art

[0002] Substations and distribution stations are important nodes for the transmission, distribution and conversion of electric energy. The main functions of substations include the transformation, distribution, control and protection of electric energy. They convert the voltage from the high voltage end to the low voltage end through transformers to meet the voltage requirements of different users or equipment. Distribution stations are nodes in the power system used to transmit electric energy from substations to end users or equipment. Distribution stations receive electric energy from substations and distribute the electric energy to different loads through distribution equipment, such as distribution transformers.

[0003] In the power system, the stable management of voltage is directly related to the safe and reliable operation of the power network. However, with the continuous expansion and complexity of the power network, voltage management faces more and more challenges. On the one hand, the fluctuation of the upper power supply voltage, the line voltage drop and the setting of the distribution transformer gear directly affect the stability of the node voltage. On the other hand, with the access of distributed power sources, the structure and characteristics of the power network have changed significantly. The line resistance value is constantly changing due to changes in load flow, which further increases the difficulty of voltage management.

[0004] The traditional method of adjusting the gear position of the distribution transformer is to observe the low-voltage outlet voltage value of each distribution node transformer at a certain moment or several moments, and directly complete the gear position adjustment of the distribution transformer. When using this gear adjustment method, when the voltage value of the upper power supply or the line voltage drop changes over time, it is easy to cause the voltage of each node of the low voltage level to exceed the upper and lower limits, and the gear adjustment is inaccurate. In order to overcome the problem of the voltage of each node of the low voltage level exceeding the upper and lower limits, an automatic gear adjustment method has emerged. The automatic gear adjustment method needs to collect operating parameters such as current and resistance, as well as parameters such as the distribution line model and length. It is easy to make mistakes and there is a problem of inaccurate gear adjustment.

[0005] Based on this, the present application proposes a distribution transformer gear adjustment method, system, terminal and storage medium. Summary of the invention

[0006] The object of the present invention is to provide a distribution transformer gear adjustment method, system, terminal and storage medium, which are used to solve the technical problem that errors are prone to occur when collecting operating parameters such as current and resistance, and parameters such as distribution line model and length.

[0007] In order to achieve the above object, the present invention provides the following technical solutions:

[0008] In a first aspect, a method for adjusting the gear position of a distribution transformer is provided, the method comprising:

[0009] S1: Obtain the low-voltage outlet voltage value curve of the transformer to be adjusted in the distribution station within the preset time period , the total number of gears, the ratio of each gear and the ratio of the current gear;

[0010] S2: Obtain the output bus voltage curve of the upper substation transformer of the transformer to be adjusted in the distribution station within the preset time period ;

[0011] S3: Based on the total number of gears of the transformer to be adjusted in the distribution station, the transformation ratio of each gear and the transformation ratio of the current gear, and the output bus voltage value curve of the transformer in the upper substation , calculate a set of low-voltage outlet voltage critical value curves for the transformer to be adjusted in the distribution station, wherein the calculation formula of the low-voltage outlet voltage critical value curve is:

[0012]

[0013] in, Representative A low voltage outlet voltage critical value curve, , ,and is an odd number, Represents the maximum transformation ratio of the transformer gear to be adjusted in the distribution station, Represents the total number of gears of transformers to be adjusted in the distribution station, Represents the current gear ratio of the transformer to be adjusted in the distribution station, ;

[0014] S4: Set the low voltage outlet voltage value curve The critical value curve of each low voltage outlet voltage By comparison, determine the gear adjustment of the transformer to be adjusted in the distribution station.

[0015] Further, in step S3, when the total number of gears of the transformer to be adjusted in the distribution station is 3: , , the calculated low voltage outlet voltage critical value curve is , , , , ;

[0016] in, ;

[0017] ;

[0018] ;

[0019] ;

[0020] .

[0021] Further, in step S3, when the total number of gears of the transformer to be adjusted in the distribution station is 3:

[0022] When the current gear is the maximum gear, the low voltage outlet voltage critical value curve is obtained. , Low voltage outlet voltage critical value curve And low voltage outlet voltage critical value curve ;

[0023] When the current gear is the middle gear, the low voltage outlet voltage critical value curve is obtained. , Low voltage outlet voltage critical value curve And low voltage outlet voltage critical value curve ;

[0024] When the current gear is the minimum gear, the low voltage outlet voltage critical value curve is obtained. , Low voltage outlet voltage critical value curve And low voltage outlet voltage critical value curve .

[0025] Further, in step S4, when the total number of gear positions of the transformer to be adjusted in the distribution station is 3, the specific steps of determining the gear position adjustment of the transformer to be adjusted in the distribution station are:

[0026] When the current gear is the maximum gear:

[0027] like , it is judged that the transformation ratio of the transformer to be adjusted in the distribution station remains unchanged;

[0028] like , it is determined that the transformation ratio of the transformer to be adjusted in the distribution station is adjusted down by one gear;

[0029] like , it is determined that the transformation ratio of the transformer to be adjusted in the distribution station is adjusted down by 2 gears;

[0030] When the current gear is the middle gear:

[0031] like , it is determined that the transformation ratio of the transformer to be adjusted in the distribution station is increased by one gear;

[0032] like , it is judged that the transformation ratio of the transformer to be adjusted in the distribution station remains unchanged;

[0033] like , it is determined that the transformation ratio of the transformer to be adjusted in the distribution station is adjusted down by one gear;

[0034] When the current gear is the minimum gear:

[0035] like , it is determined that the transformation ratio of the transformer to be adjusted in the distribution station is increased by 2 gears;

[0036] like , it is determined that the transformation ratio of the transformer to be adjusted in the distribution station is increased by one gear;

[0037] like , it is judged that the transformation ratio of the transformer to be adjusted in the distribution station remains unchanged.

[0038] Further, in step S3, when the total number of gears of the transformer to be adjusted in the distribution station is 5: , , the calculated low voltage outlet voltage critical value curve is , , , , , , , , ;

[0039] in, ;

[0040] ;

[0041] ;

[0042] ;

[0043] ;

[0044] ;

[0045] ;

[0046] ;

[0047] ;

[0048] When the current gear is the maximum gear, the low voltage outlet voltage critical value curve is obtained. , Low voltage outlet voltage critical value curve , Low voltage outlet voltage critical value curve , Low voltage outlet voltage critical value curve And low voltage outlet voltage critical value curve ;

[0049] When the current gear is the fourth gear, the low voltage outlet voltage critical value curve is obtained. , Low voltage outlet voltage critical value curve , Low voltage outlet voltage critical value curve , Low voltage outlet voltage critical value curve And low voltage outlet voltage critical value curve ;

[0050] When the current gear is the middle gear, the low voltage outlet voltage critical value curve is obtained. , Low voltage outlet voltage critical value curve , Low voltage outlet voltage critical value curve , Low voltage outlet voltage critical value curve And low voltage outlet voltage critical value curve ;

[0051] When the current gear is the second gear, the low voltage outlet voltage critical value curve is obtained. , Low voltage outlet voltage critical value curve , Low voltage outlet voltage critical value curve , Low voltage outlet voltage critical value curve And low voltage outlet voltage critical value curve ;

[0052] When the current gear is the first gear, the low voltage outlet voltage critical value curve is obtained , Low voltage outlet voltage critical value curve , Low voltage outlet voltage critical value curve , Low voltage outlet voltage critical value curve And low voltage outlet voltage critical value curve .

[0053] Further, in step S4, when the total number of gear positions of the transformer to be adjusted in the distribution station is 5, the specific steps of determining the gear position adjustment of the transformer to be adjusted in the distribution station are:

[0054] When the current gear is the maximum gear:

[0055] like When , it is judged that the transformation ratio of the transformer to be adjusted in the distribution station remains unchanged;

[0056] like When , it is determined that the transformation ratio of the transformer to be adjusted in the distribution station is adjusted down by one gear;

[0057] like When , it is determined that the transformation ratio of the transformer to be adjusted in the distribution station is adjusted down by 2 gears;

[0058] like When , it is determined that the transformation ratio of the transformer to be adjusted in the distribution station is adjusted down by 3 gears;

[0059] like When , it is determined that the transformation ratio of the transformer to be adjusted in the distribution station is adjusted down by 4 gears;

[0060] When the current gear is the fourth gear:

[0061] like When , it is determined that the transformation ratio of the transformer to be adjusted in the distribution station is increased by 1 gear;

[0062] like When , it is judged that the transformation ratio of the transformer to be adjusted in the distribution station remains unchanged;

[0063] like When , it is determined that the transformation ratio of the transformer to be adjusted in the distribution station is adjusted down by one gear;

[0064] like When , it is determined that the transformation ratio of the transformer to be adjusted in the distribution station is adjusted down by 2 gears;

[0065] like When , it is determined that the transformation ratio of the transformer to be adjusted in the distribution station is adjusted down by 3 gears;

[0066] When the current gear is the middle gear:

[0067] like When , it is determined that the transformation ratio of the transformer to be adjusted in the distribution station is increased by 2 gears;

[0068] like When , it is determined that the transformation ratio of the transformer to be adjusted in the distribution station is increased by 1 gear;

[0069] like When , it is judged that the transformation ratio of the transformer to be adjusted in the distribution station remains unchanged;

[0070] like When , it is determined that the transformation ratio of the transformer to be adjusted in the distribution station is adjusted down by one gear;

[0071] like When , it is determined that the transformation ratio of the transformer to be adjusted in the distribution station is adjusted down by 2 gears;

[0072] When the current gear is the second gear:

[0073] like When , it is determined that the transformation ratio of the transformer to be adjusted in the distribution station is increased by 3 gears;

[0074] like When , it is determined that the transformation ratio of the transformer to be adjusted in the distribution station is increased by 2 gears;

[0075] like When , it is determined that the transformation ratio of the transformer to be adjusted in the distribution station is increased by 1 gear;

[0076] like When , it is judged that the transformation ratio of the transformer to be adjusted in the distribution station remains unchanged;

[0077] like When , it is determined that the transformation ratio of the transformer to be adjusted in the distribution station is adjusted down by one gear;

[0078] When the current gear is the first gear:

[0079] like When , it is determined that the transformation ratio of the transformer to be adjusted in the distribution station is increased by 4 gears;

[0080] like When , it is determined that the transformation ratio of the transformer to be adjusted in the distribution station is increased by 3 gears;

[0081] like When , it is determined that the transformation ratio of the transformer to be adjusted in the distribution station is increased by 2 gears;

[0082] like When , it is determined that the transformation ratio of the transformer to be adjusted in the distribution station is increased by 1 gear;

[0083] like When , it is determined that the transformation ratio of the transformer to be adjusted in the distribution station remains unchanged.

[0084] Furthermore, if the low voltage outlet voltage value curve , across the voltage critical value curve of two adjacent low-voltage outlets When the range is reached, an early warning message is issued and the gear adjustment of the transformer to be adjusted in the distribution station is manually determined.

[0085] In a second aspect, a transformer gear adjustment system is provided, the system comprising:

[0086] The first information acquisition module obtains the low-voltage outlet voltage value curve of the transformer to be adjusted in the distribution station within a preset time period , the total number of gears, the ratio of each gear and the ratio of the current gear;

[0087] The second information acquisition module obtains the output bus voltage value curve of the upper substation transformer of the transformer to be adjusted in the distribution station within a preset time period ;

[0088] The critical value curve calculation module is based on the total number of gears of the transformer to be adjusted in the distribution station, the transformation ratio of each gear and the transformation ratio of the current gear, as well as the export bus voltage value curve of the transformer in the upper substation , calculate a set of low-voltage outlet voltage critical value curves for the transformer to be adjusted in the distribution station, wherein the calculation formula of the low-voltage outlet voltage critical value curve is:

[0089]

[0090] in, Representative A low voltage outlet voltage critical value curve, , ,and is an odd number, Represents the maximum transformation ratio of the transformer gear to be adjusted in the distribution station, Represents the total number of gears of transformers to be adjusted in the distribution station, Represents the current gear ratio of the transformer to be adjusted in the distribution station, ;

[0091] The gear selection module adjusts the low voltage outlet voltage value curve The critical value curve of each low voltage outlet voltage By comparison, determine the gear adjustment of the transformer to be adjusted in the distribution station.

[0092] In a third aspect, a terminal includes:

[0093] processor;

[0094] A memory for storing execution instructions of the processor;

[0095] The processor is configured to execute the methods described in the above aspects.

[0096] In a fourth aspect, a computer-readable storage medium storing a computer program is provided, wherein when the program is executed by a processor, the methods described in the above aspects are implemented.

[0097] Beneficial effects of the present invention: directly collecting the low-voltage outlet voltage value curve of the transformer to be adjusted in the distribution station , the total number of gears and the transformation ratio of each gear, as well as the output bus voltage value curve of the upper substation transformer The gear adjustment of the transformer to be adjusted in the distribution station can be determined. It does not need to collect operating parameters such as current and resistance, and avoids collecting the model and length of the distribution line, reducing calculation errors and improving the accuracy of gear adjustment.

[0098] These and other objects, features and advantages of the present invention will be fully reflected in the following detailed description. BRIEF DESCRIPTION OF THE DRAWINGS

[0099] Figure 1 A schematic flow chart of the method for adjusting the gear position of a distribution transformer of the present invention is shown.

[0100] Figure 2 The output bus voltage value curve of the upper transformer substation transformer of the distribution station to be adjusted in the distribution transformer gear adjustment method of the present invention is shown .

[0101] Figure 3 The low voltage outlet voltage value curve of the transformer to be adjusted in the distribution station of the present invention is shown . DETAILED DESCRIPTION

[0102] The following description is used to disclose the present invention so that those skilled in the art can implement the present invention. The preferred embodiments described below are only examples, and those skilled in the art can think of other obvious variations. The basic principles of the present invention defined in the following description can be applied to other embodiments, variations, improvements, equivalents, and other technical solutions that do not deviate from the spirit and scope of the present invention.

[0103] It should be understood by those skilled in the art that, in the disclosure of the specification, the terms "include" and "have" and any variations thereof are intended to cover non-exclusive inclusions, for example, a process, method, system, product or device including a series of steps or units is not necessarily limited to those steps or units clearly listed, but may include other steps or units that are not clearly listed or inherent to these processes, methods, products or devices. Therefore, the above terms should not be understood as limiting the present invention.

[0104] It is to be understood that the term "one" should be understood as "at least one" or "one or more", that is, in one embodiment, the number of an element may be one, while in another embodiment, the number of the element may be multiple, and the term "one" should not be understood as a limitation on the quantity.

[0105] refer to Figure 1 A distribution transformer gear adjustment method according to a preferred embodiment of the present invention will be described in detail below, wherein the method includes steps S1-S4.

[0106] S1: Obtain the low-voltage outlet voltage value curve of the transformer to be adjusted in the distribution station within the preset time period , the total number of gears, the ratio of each gear and the ratio of the current gear;

[0107] S2: Obtain the output bus voltage curve of the upper substation transformer of the transformer to be adjusted in the distribution station within the preset time period ;

[0108] S3: Based on the total number of gears of the transformer to be adjusted in the distribution station, the transformation ratio of each gear and the transformation ratio of the current gear, and the output bus voltage value curve of the transformer in the upper substation , calculate a set of low-voltage outlet voltage critical value curves for the transformer to be adjusted in the distribution station, wherein the calculation formula of the low-voltage outlet voltage critical value curve is:

[0109]

[0110] in, Representative A low voltage outlet voltage critical value curve, , ,and is an odd number, Represents the maximum transformation ratio of the transformer gear to be adjusted in the distribution station, Represents the total number of gears of transformers to be adjusted in the distribution station, Represents the current gear ratio of the transformer to be adjusted in the distribution station, ;

[0111] S4: Set the low voltage outlet voltage value curve The critical value curve of each low voltage outlet voltage By comparison, determine the gear adjustment of the transformer to be adjusted in the distribution station.

[0112] It can be understood that the preset time period is a previous time period.

[0113]

[0114] This method directly collects the low-voltage outlet voltage value curve of the transformer to be adjusted in the distribution station , the total number of gears and the transformation ratio of each gear, as well as the output bus voltage value curve of the upper substation transformer The gear adjustment of the transformer to be adjusted in the distribution station can be determined. It does not need to collect operating parameters such as current and resistance, and avoids collecting the model and length of the distribution line, reducing calculation errors and improving the accuracy of gear adjustment.

[0115] In this embodiment, step S4 includes:

[0116] If the low voltage outlet voltage curve The first low-voltage outlet voltage critical value curve calculated The calculated second low voltage outlet voltage critical value curve If the ratio of the transformer to be adjusted in the distribution station is between n and 1, the transformation ratio will be increased by n-1 levels.

[0117] If the low voltage outlet voltage curve The calculated second low voltage outlet voltage critical value curve The calculated third low voltage outlet voltage critical value curve If the ratio of the transformer to be adjusted in the distribution station is between n and 2, the transformation ratio will be increased by n-2 levels.

[0118] If the low voltage outlet voltage curve The calculated nth low voltage outlet voltage critical value curve The calculated voltage critical value curve of the n+1th low voltage outlet The gear position of the transformer to be adjusted in the distribution station remains unchanged.

[0119] If the low voltage outlet voltage curve The calculated n+1th low voltage outlet voltage critical value curve And the calculated n+2th low voltage outlet voltage critical value curve If the ratio of the transformer to be adjusted is between 0 and 1, the transformation ratio of the transformer to be adjusted in the distribution station will be reduced by 1 level.

[0120] If the low voltage outlet voltage curve The calculated n+2 low voltage outlet voltage critical value curve The calculated voltage critical value curve of the n+3th low voltage outlet If the ratio of the transformer to be adjusted in the distribution station is between 2 and 3, the transformation ratio of the transformer to be adjusted in the distribution station shall be reduced by 2 levels.

[0121] If the low voltage outlet voltage curve The calculated n+(n-2)th low voltage outlet voltage critical value curve and the calculated n+(n-1)th low voltage outlet voltage critical value curve If the ratio of the transformer to be adjusted in the distribution station is between n and 2, the transformation ratio will be reduced by n-2 levels.

[0122] If the low voltage outlet voltage curve The calculated n+(n-1)th low voltage outlet voltage critical value curve Below, the transformation ratio of the transformer to be adjusted in the distribution station is reduced by n-1 levels.

[0123] For example, if the low voltage outlet voltage value curve , across the voltage critical value curve of two adjacent low-voltage outlets When the range is reached, an early warning message is issued and the gear adjustment of the transformer to be adjusted in the distribution station is manually determined.

[0124] Taking a three-speed transformer as an example, the transformer ratio of the three speeds is The transformation ratios are 26.25, 25 and 23.75 respectively. , , , the calculated low voltage outlet voltage critical value curve is , , , , .

[0125] in, .

[0126] .

[0127] .

[0128] .

[0129] .

[0130] The current gear ratio of the transformer to be adjusted in the distribution station is S, and the gear ratio after changing one gear smaller than the current gear is recorded as , the gear ratio after changing 2 gears smaller than the current gear is recorded as , the gear ratio after changing one gear higher than the current gear is recorded as , the gear ratio after changing 2 gears larger than the current gear is recorded as .

[0131] When the current gear is the maximum gear, the gear ratio after changing one gear larger than the current gear is The value is 0, which means the gear ratio is 2 gears higher than the current gear. Take the value as 0 to get the low voltage outlet voltage critical value curve , Low voltage outlet voltage critical value curve And low voltage outlet voltage critical value curve .

[0132] When the current gear is the middle gear, the gear ratio after the current gear is 2 gears smaller than the current gear The value is 0, which means the gear ratio is 2 gears higher than the current gear. Take the value as 0 to get the low voltage outlet voltage critical value curve , Low voltage outlet voltage critical value curve And low voltage outlet voltage critical value curve .

[0133] When the current gear is the minimum gear, the gear ratio after changing one gear smaller than the current gear is The value is 0, which means the gear ratio is 2 gears smaller than the current gear. Take the value as 0 to get the low voltage outlet voltage critical value curve , Low voltage outlet voltage critical value curve And low voltage outlet voltage critical value curve .

[0134] It can be understood that there is no gear greater than the maximum gear, and there is no gear less than the minimum gear.

[0135] The critical value curve of low voltage outlet voltage for determining transformer gear adjustment is shown in Table 1 below:

[0136] Table 1

[0137]

[0138] When the current gear is the maximum gear:

[0139] like , it is judged that the transformation ratio of the transformer to be adjusted in the distribution station remains unchanged.

[0140] like , it is determined that the transformation ratio of the transformer to be adjusted in the distribution station is reduced by 1 gear.

[0141] like , it is determined that the transformation ratio of the transformer to be adjusted in the distribution station is reduced by 2 gears.

[0142] When the current gear is the middle gear:

[0143] like , it is determined that the transformation ratio of the transformer to be adjusted in the distribution station should be increased by 1 gear.

[0144] like , it is judged that the transformation ratio of the transformer to be adjusted in the distribution station remains unchanged.

[0145] like , it is determined that the transformation ratio of the transformer to be adjusted in the distribution station is reduced by 1 gear.

[0146] When the current gear is the minimum gear:

[0147] like , it is determined that the transformation ratio of the transformer to be adjusted in the distribution station is increased by 2 gears.

[0148] like , it is determined that the transformation ratio of the transformer to be adjusted in the distribution station should be increased by 1 gear.

[0149] like , it is judged that the transformation ratio of the transformer to be adjusted in the distribution station remains unchanged.

[0150] Taking a five-speed transformer as an example, the speed ratios are 26.25, 25.625, 25, 24.375, and 23.75 respectively. , , , the calculated low voltage outlet voltage critical value curve is , , , , , , , , .

[0151] in, .

[0152] .

[0153] .

[0154] .

[0155] .

[0156] .

[0157] .

[0158] .

[0159] .

[0160] The current gear ratio of the transformer to be adjusted in the distribution station is S, and the gear ratio after changing one gear smaller than the current gear is recorded as , the gear ratio after changing 2 gears smaller than the current gear is recorded as , the gear ratio after changing 3 gears smaller than the current gear is recorded as , the gear ratio after changing 4 gears smaller than the current gear is recorded as , the gear ratio after changing one gear higher than the current gear is recorded as , the gear ratio after changing 2 gears larger than the current gear is recorded as , the gear ratio after changing 3 gears larger than the current gear is recorded as , the gear ratio after changing 4 gears larger than the current gear is recorded as .

[0161] When the current gear is the maximum gear, the gear ratio after changing one gear larger than the current gear is The value is 0, which means the gear ratio is 2 gears higher than the current gear. The value is 0, which means the gear ratio is 3 gears higher than the current gear. The value is 0, which means the gear ratio is 4 gears higher than the current gear. Take the value as 0 to get the low voltage outlet voltage critical value curve , Low voltage outlet voltage critical value curve , Low voltage outlet voltage critical value curve , Low voltage outlet voltage critical value curve And low voltage outlet voltage critical value curve .

[0162] When the current gear is the fourth gear, the gear ratio after the current gear is 4 gears smaller than the current gear The value is 0, which means the gear ratio is 2 gears higher than the current gear. The value is 0, which means the gear ratio is 3 gears higher than the current gear. The value is 0, which means the gear ratio is 4 gears higher than the current gear. Take the value as 0 to get the low voltage outlet voltage critical value curve , Low voltage outlet voltage critical value curve , Low voltage outlet voltage critical value curve , Low voltage outlet voltage critical value curve And low voltage outlet voltage critical value curve .

[0163] When the current gear is the middle gear, the gear ratio after changing 3 gears smaller than the current gear is The value is 0, which means the gear ratio is 4 gears smaller than the current gear. The value is 0, which means the gear ratio is 3 gears higher than the current gear. The value is 0, which means the gear ratio is 4 gears higher than the current gear. Take the value as 0 to get the low voltage outlet voltage critical value curve , Low voltage outlet voltage critical value curve , Low voltage outlet voltage critical value curve , Low voltage outlet voltage critical value curve And low voltage outlet voltage critical value curve .

[0164] When the current gear is the second gear, the gear ratio after the current gear is 2 gears smaller than the current gear The value is 0, which means the gear ratio is 3 gears smaller than the current gear. The value is 0, which means the gear ratio is 4 gears smaller than the current gear. The value is 0, which means the gear ratio is 4 gears higher than the current gear. Take the value as 0 to get the low voltage outlet voltage critical value curve , Low voltage outlet voltage critical value curve , Low voltage outlet voltage critical value curve , Low voltage outlet voltage critical value curve And low voltage outlet voltage critical value curve .

[0165] When the current gear is the minimum gear, the gear ratio after changing one gear smaller than the current gear is The value is 0, which means the gear ratio is 2 gears smaller than the current gear. The value is 0, which means the gear ratio is 3 gears smaller than the current gear. The value is 0, which means the gear ratio is 4 gears smaller than the current gear. Take the value as 0 to get the low voltage outlet voltage critical value curve , Low voltage outlet voltage critical value curve , Low voltage outlet voltage critical value curve , Low voltage outlet voltage critical value curve And low voltage outlet voltage critical value curve .

[0166] The critical value curve of low voltage outlet voltage for determining transformer gear adjustment is shown in Table 2 below:

[0167] Table 2

[0168]

[0169] When the current gear is the maximum gear:

[0170] like When , it is determined that the transformation ratio of the transformer to be adjusted in the distribution station remains unchanged.

[0171] like When , it is determined that the transformation ratio of the transformer to be adjusted in the distribution station is adjusted down by one gear.

[0172] like When , it is determined that the transformation ratio of the transformer to be adjusted in the distribution station is reduced by 2 gears.

[0173] like When , it is determined that the transformation ratio of the transformer to be adjusted in the distribution station is reduced by 3 gears.

[0174] like When , it is determined that the transformation ratio of the transformer to be adjusted in the distribution station is reduced by 4 gears.

[0175] When the current gear is the fourth gear:

[0176] like When , it is determined that the transformation ratio of the transformer to be adjusted in the distribution station is increased by 1 gear.

[0177] like When , it is determined that the transformation ratio of the transformer to be adjusted in the distribution station remains unchanged.

[0178] like When , it is determined that the transformation ratio of the transformer to be adjusted in the distribution station is adjusted down by one gear.

[0179] like When , it is determined that the transformation ratio of the transformer to be adjusted in the distribution station is reduced by 2 gears.

[0180] like When , it is determined that the transformation ratio of the transformer to be adjusted in the distribution station is reduced by 3 gears.

[0181] When the current gear is the middle gear:

[0182] like When , it is determined that the transformation ratio of the transformer to be adjusted in the distribution station is increased by 2 gears.

[0183] like When , it is determined that the transformation ratio of the transformer to be adjusted in the distribution station is increased by 1 gear.

[0184] like When , it is determined that the transformation ratio of the transformer to be adjusted in the distribution station remains unchanged.

[0185] like When , it is determined that the transformation ratio of the transformer to be adjusted in the distribution station is adjusted down by one gear.

[0186] like When , it is determined that the transformation ratio of the transformer to be adjusted in the distribution station is reduced by 2 gears.

[0187] When the current gear is the second gear:

[0188] like When , it is determined that the transformation ratio of the transformer to be adjusted in the distribution station is increased by 3 gears.

[0189] like When , it is determined that the transformation ratio of the transformer to be adjusted in the distribution station is increased by 2 gears.

[0190] like When , it is determined that the transformation ratio of the transformer to be adjusted in the distribution station is increased by 1 gear.

[0191] like When , it is determined that the transformation ratio of the transformer to be adjusted in the distribution station remains unchanged.

[0192] like When , it is determined that the transformation ratio of the transformer to be adjusted in the distribution station is adjusted down by one gear.

[0193] When the current gear is the first gear:

[0194] like When , it is determined that the transformation ratio of the transformer to be adjusted in the distribution station is increased by 4 gears.

[0195] like When , it is determined that the transformation ratio of the transformer to be adjusted in the distribution station is increased by 3 gears.

[0196] like When , it is determined that the transformation ratio of the transformer to be adjusted in the distribution station is increased by 2 gears.

[0197] like When , it is determined that the transformation ratio of the transformer to be adjusted in the distribution station is increased by 1 gear.

[0198] like When , it is determined that the transformation ratio of the transformer to be adjusted in the distribution station remains unchanged.

[0199] For example, Figure 2 The output bus voltage curve of the upper substation transformer of the transformer to be adjusted in the distribution station , Figure 3 The low voltage outlet voltage curve of the transformer to be adjusted in the distribution station The transformer to be adjusted in the distribution station is a 5-speed transformer, and the current operating gear is in gear 3. The process of determining whether the transformer to be adjusted in the distribution station should be adjusted is shown in Table 3 below:

[0200] Table 3:

[0201]

[0202] Therefore, it is determined that the transformer to be adjusted in this distribution station should be adjusted 2 gears higher.

[0203] The present invention also provides a transformer gear adjustment system, which includes: an information acquisition module, a transformation ratio determination module, a critical value curve calculation module and a gear adjustment selection module.

[0204] The first information acquisition module obtains the low-voltage outlet voltage value curve of the transformer to be adjusted in the distribution station within a preset time period , the total number of gears, the ratio of each gear and the ratio of the current gear;

[0205] The second information acquisition module obtains the output bus voltage value curve of the upper substation transformer of the transformer to be adjusted in the distribution station within a preset time period ;

[0206] The critical value curve calculation module is based on the total number of gears of the transformer to be adjusted in the distribution station, the transformation ratio of each gear and the transformation ratio of the current gear, as well as the export bus voltage value curve of the transformer in the upper substation , calculate a set of low-voltage outlet voltage critical value curves for the transformer to be adjusted in the distribution station, wherein the calculation formula of the low-voltage outlet voltage critical value curve is:

[0207]

[0208] in, Representative A low voltage outlet voltage critical value curve, , ,and is an odd number, Represents the maximum transformation ratio of the transformer gear to be adjusted in the distribution station, Represents the total number of gears of transformers to be adjusted in the distribution station, Represents the current gear ratio of the transformer to be adjusted in the distribution station, ;

[0209] The gear selection module adjusts the low voltage outlet voltage value curve The critical value curve of each low voltage outlet voltage By comparison, determine the gear adjustment of the transformer to be adjusted in the distribution station.

[0210] The present invention also provides a terminal, comprising:

[0211] processor,

[0212] A memory for storing execution instructions of the processor,

[0213] The processor is configured to execute the method described in any one of the above embodiments.

[0214] The present invention also provides a computer-readable storage medium storing a computer program, which, when executed by a processor, implements the method described in any one of the above embodiments.

[0215] It should be understood by those skilled in the art that the embodiments of the present invention described above and shown in the accompanying drawings are only examples and do not limit the present invention. The advantages of the present invention have been fully and effectively achieved. The functional and structural principles of the present invention have been demonstrated and explained in the embodiments, and the embodiments of the present invention may be deformed or modified in any way without departing from the principles.

Claims

1. A method for adjusting the gear position of a distribution transformer, characterized in that: The method comprises: S1: Obtain the low-voltage outlet voltage value curve of the transformer to be adjusted in the distribution station within the preset time period , the total number of gears, the ratio of each gear and the ratio of the current gear; S2: Obtain the output bus voltage curve of the upper substation transformer of the transformer to be adjusted in the distribution station within the preset time period ; S3: Based on the total number of gears of the transformer to be adjusted in the distribution station, the transformation ratio of each gear and the transformation ratio of the current gear, and the output bus voltage value curve of the transformer in the upper substation , calculate a set of low-voltage outlet voltage critical value curves for the transformer to be adjusted in the distribution station, wherein the calculation formula of the low-voltage outlet voltage critical value curve is: in, Representative A low voltage outlet voltage critical value curve, , ,and is an odd number, Represents the maximum transformation ratio of the transformer gear to be adjusted in the distribution station, Represents the total number of gears of transformers to be adjusted in the distribution station, Represents the current gear ratio of the transformer to be adjusted in the distribution station, ; S4: Set the low voltage outlet voltage value curve The critical value curve of each low voltage outlet voltage By comparison, determine the gear adjustment of the transformer to be adjusted in the distribution station.

2. The method for adjusting the gear position of a distribution transformer according to claim 1, characterized in that: In step S3, when the total number of gears of the transformer to be adjusted in the distribution station is 3: , , the calculated low voltage outlet voltage critical value curve is , , , , ; in, ; ； ； ； 。 3. The method for adjusting the gear position of a distribution transformer according to claim 2, characterized in that: In step S3, when the total number of gears of the transformer to be adjusted in the distribution station is 3: When the current gear is the maximum gear, the low voltage outlet voltage critical value curve is obtained. , Low voltage outlet voltage critical value curve And low voltage outlet voltage critical value curve ; When the current gear is the middle gear, the low voltage outlet voltage critical value curve is obtained. , Low voltage outlet voltage critical value curve And low voltage outlet voltage critical value curve ; When the current gear is the minimum gear, the low voltage outlet voltage critical value curve is obtained. , Low voltage outlet voltage critical value curve And low voltage outlet voltage critical value curve .

4. The method for adjusting the gear position of a distribution transformer according to claim 3, characterized in that: In step S4, when the total number of gear positions of the transformer to be adjusted in the distribution station is 3, the specific steps of determining the gear position adjustment of the transformer to be adjusted in the distribution station are: When the current gear is the maximum gear: like , it is judged that the transformation ratio of the transformer to be adjusted in the distribution station remains unchanged; like , it is determined that the transformation ratio of the transformer to be adjusted in the distribution station is adjusted down by one gear; like , it is determined that the transformation ratio of the transformer to be adjusted in the distribution station is adjusted down by 2 gears; When the current gear is the middle gear: like , it is determined that the transformation ratio of the transformer to be adjusted in the distribution station is increased by one gear; like , it is judged that the transformation ratio of the transformer to be adjusted in the distribution station remains unchanged; like , it is determined that the transformation ratio of the transformer to be adjusted in the distribution station is adjusted down by one gear; When the current gear is the minimum gear: like , it is determined that the transformation ratio of the transformer to be adjusted in the distribution station is increased by 2 gears; like , it is determined that the transformation ratio of the transformer to be adjusted in the distribution station is increased by one gear; like , it is judged that the transformation ratio of the transformer to be adjusted in the distribution station remains unchanged.

5. The method for adjusting the gear position of a distribution transformer according to claim 1, characterized in that: In step S3, when the total number of gears of the transformer to be adjusted in the distribution station is 5: , , the calculated low voltage outlet voltage critical value curve is , , , , , , , , ; in, ; ； ； ； ； ； ； ； ； When the current gear is the maximum gear, the low voltage outlet voltage critical value curve is obtained. , Low voltage outlet voltage critical value curve , Low voltage outlet voltage critical value curve , Low voltage outlet voltage critical value curve And low voltage outlet voltage critical value curve ; When the current gear is the fourth gear, the low voltage outlet voltage critical value curve is obtained. , Low voltage outlet voltage critical value curve , Low voltage outlet voltage critical value curve , Low voltage outlet voltage critical value curve And low voltage outlet voltage critical value curve ; When the current gear is the middle gear, the low voltage outlet voltage critical value curve is obtained. , Low voltage outlet voltage critical value curve , Low voltage outlet voltage critical value curve , Low voltage outlet voltage critical value curve And low voltage outlet voltage critical value curve ; When the current gear is the second gear, the low voltage outlet voltage critical value curve is obtained. , Low voltage outlet voltage critical value curve , Low voltage outlet voltage critical value curve , Low voltage outlet voltage critical value curve And low voltage outlet voltage critical value curve ; When the current gear is the first gear, the low voltage outlet voltage critical value curve is obtained , Low voltage outlet voltage critical value curve , Low voltage outlet voltage critical value curve , Low voltage outlet voltage critical value curve And low voltage outlet voltage critical value curve .

6. The method for adjusting the gear position of a distribution transformer according to claim 4, characterized in that: In step S4, when the total number of gear positions of the transformer to be adjusted in the distribution station is 5, the specific steps for determining the gear position adjustment of the transformer to be adjusted in the distribution station are: When the current gear is the maximum gear: like When , it is judged that the transformation ratio of the transformer to be adjusted in the distribution station remains unchanged; like When , it is determined that the transformation ratio of the transformer to be adjusted in the distribution station is adjusted down by one gear; like When , it is determined that the transformation ratio of the transformer to be adjusted in the distribution station is adjusted down by 2 gears; like When , it is determined that the transformation ratio of the transformer to be adjusted in the distribution station is adjusted down by 3 gears; like When , it is determined that the transformation ratio of the transformer to be adjusted in the distribution station is adjusted down by 4 gears; When the current gear is the fourth gear: like When , it is determined that the transformation ratio of the transformer to be adjusted in the distribution station is increased by 1 gear; like When , it is judged that the transformation ratio of the transformer to be adjusted in the distribution station remains unchanged; like When , it is determined that the transformation ratio of the transformer to be adjusted in the distribution station is adjusted down by one gear; like When , it is determined that the transformation ratio of the transformer to be adjusted in the distribution station is adjusted down by 2 gears; like When , it is determined that the transformation ratio of the transformer to be adjusted in the distribution station is adjusted down by 3 gears; When the current gear is the middle gear: like When , it is determined that the transformation ratio of the transformer to be adjusted in the distribution station is increased by 2 gears; like When , it is determined that the transformation ratio of the transformer to be adjusted in the distribution station is increased by 1 gear; like When , it is judged that the transformation ratio of the transformer to be adjusted in the distribution station remains unchanged; like When , it is determined that the transformation ratio of the transformer to be adjusted in the distribution station is adjusted down by one gear; like When , it is determined that the transformation ratio of the transformer to be adjusted in the distribution station is adjusted down by 2 gears; When the current gear is the second gear: like When , it is determined that the transformation ratio of the transformer to be adjusted in the distribution station is increased by 3 gears; like When , it is determined that the transformation ratio of the transformer to be adjusted in the distribution station is increased by 2 gears; like When , it is determined that the transformation ratio of the transformer to be adjusted in the distribution station is increased by 1 gear; like When , it is judged that the transformation ratio of the transformer to be adjusted in the distribution station remains unchanged; like When , it is determined that the transformation ratio of the transformer to be adjusted in the distribution station is adjusted down by one gear; When the current gear is the first gear: like When , it is determined that the transformation ratio of the transformer to be adjusted in the distribution station is increased by 4 gears; like When , it is determined that the transformation ratio of the transformer to be adjusted in the distribution station is increased by 3 gears; like When , it is determined that the transformation ratio of the transformer to be adjusted in the distribution station is increased by 2 gears; like When , it is determined that the transformation ratio of the transformer to be adjusted in the distribution station is increased by 1 gear; like When , it is determined that the transformation ratio of the transformer to be adjusted in the distribution station remains unchanged.

7. The method for adjusting the gear position of a distribution transformer according to claim 2, characterized in that: If the low voltage outlet voltage curve , across the voltage critical value curve of two adjacent low-voltage outlets When the interval is reached, an early warning message is issued and the gear adjustment of the transformer to be adjusted in the distribution station is manually determined.

8. A transformer gear adjustment system, characterized in that: The system comprises: The first information acquisition module obtains the low-voltage outlet voltage value curve of the transformer to be adjusted in the distribution station within a preset time period , the total number of gears, the ratio of each gear and the ratio of the current gear; The second information acquisition module obtains the output bus voltage value curve of the upper substation transformer of the transformer to be adjusted in the distribution station within a preset time period ; The critical value curve calculation module is based on the total number of gears of the transformer to be adjusted in the distribution station, the transformation ratio of each gear and the transformation ratio of the current gear, as well as the export bus voltage value curve of the transformer in the upper substation , calculate a set of low-voltage outlet voltage critical value curves for the transformer to be adjusted in the distribution station, wherein the calculation formula of the low-voltage outlet voltage critical value curve is: in, Representative A low voltage outlet voltage critical value curve, , ,and is an odd number, Represents the maximum transformation ratio of the transformer gear to be adjusted in the distribution station, Represents the total number of gears of transformers to be adjusted in the distribution station, Represents the current gear ratio of the transformer to be adjusted in the distribution station, ; The gear selection module adjusts the low voltage outlet voltage value curve The critical value curve of each low voltage outlet voltage By comparison, determine the gear adjustment of the transformer to be adjusted in the distribution station.

9. A terminal, characterized in that: include: processor; A memory for storing execution instructions of the processor; The processor is configured to execute the method according to any one of claims 1 to 7.

10. A computer-readable storage medium storing a computer program, characterized in that: When the program is executed by a processor, the method according to any one of claims 1 to 7 is implemented.

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