No-load voltage regulation tap joint adjustment method and device, terminal equipment and storage medium

Abstract

The invention discloses a no-load voltage regulation tap adjusting method and device, terminal equipment and a storage medium, and the method comprises the steps: obtaining a first number of times when a first voltage class bus runs overtime beyond an upper limit and a second voltage class bus runs overtime beyond a lower limit in a preset first period, a second number of times that the first voltage level bus runs overtime beyond the lower limit and the second level bus runs overtime beyond the upper limit; when the first number of times is greater than a preset first number of times threshold value, reducing the gear of the no-load voltage regulation tap of the first voltage grade main transformer; and when the second number of times is greater than a preset second number of times threshold value, the gear of the no-load voltage regulation tap of the first voltage grade main transformer is raised. The voltage of each side of the transformer can be reasonably distributed, and the purposes of improving system voltage quality and maintaining safety and stability of a power grid are achieved.

Description

Technical Field

[0001] The present invention relates to the technical field of power grid dispatching, and in particular to a method, a device, a terminal device and a storage medium for adjusting an off-load voltage regulating tap. Background Art

[0002] Automatic voltage control system is an important means to achieve safe, economical and high-quality operation of power grid. Its basic principle is to achieve reasonable distribution of reactive voltage in the power grid by coordinating and controlling the reactive output of generators, transformer taps and reactive compensation equipment.

[0003] At present, the automatic voltage control system of regional power grid still mostly adopts the three-level voltage control mode based on "soft partitioning". The three-level and two-level voltage control functions are completed in the automatic voltage control master station of the regional power grid dispatching center. The first-level voltage control object is the power plant or substation. The substation is used as a voltage monitoring point and control point. The automatic voltage control system generally uses the method of switching capacitors and reactors to adjust the voltage. The main transformers of some substations are no-load voltage tap changers, which are prone to unreasonable tap position problems, resulting in the bus voltage on the high-voltage side of the substation being too high or too low for a long time, and the bus voltage on the medium-voltage side being too low or too high for a long time, affecting the safe operation of the power grid. Therefore, in view of the no-load voltage tap changer gear planning problem of the main transformer, an optimization adjustment plan is proposed to make the voltage distribution on each side of the transformer basically reasonable, which is of great significance for ensuring the voltage quality of the power grid and improving the voltage qualification rate. Summary of the invention

[0004] The invention provides a no-load voltage regulating tap adjustment method, device, terminal equipment and storage medium to solve the technical problem of unreasonable gear layout of no-load voltage regulating tap.

[0005] In order to solve the above technical problems, an embodiment of the present invention provides a no-load voltage regulating tap adjustment method, comprising:

[0006] Obtain the first number of times that the first voltage level busbar times out of the upper limit and the second voltage level busbar times out of the lower limit within a preset first cycle, and the second number of times that the first voltage level busbar times out of the lower limit and the second voltage level busbar times out of the upper limit;

[0007] When the first number is greater than the preset first number threshold, the gear position of the no-load voltage regulating tap of the first voltage level main transformer is reduced; when the second number is greater than the preset second number threshold, the gear position of the no-load voltage regulating tap of the first voltage level main transformer is increased.

[0008] As a preferred solution, the obtaining, within a preset first cycle, of the first number of times the first voltage level bus exceeds the upper limit and the second voltage level bus exceeds the lower limit and the second number of times the first voltage level bus exceeds the lower limit and the second level bus exceeds the upper limit and the timeout, includes:

[0009] In the first cycle, repeatedly perform data statistical operations several times according to a preset first frequency until the first cycle ends, and obtain the first number of times the first voltage level bus runs for a long time above the upper limit and the second voltage level bus runs for a long time above the lower limit in the first cycle, and the second number of times the first voltage level bus runs for a long time above the lower limit and the second voltage level bus runs for a long time above the upper limit;

[0010] The data statistics operation includes:

[0011] Obtain, in the current second cycle, the first duration of the operation of the first voltage level bus exceeding the upper limit, the second duration of the operation of the second voltage level bus exceeding the lower limit, the third duration of the operation of the first voltage level bus exceeding the lower limit, and the fourth duration of the operation of the second voltage level bus exceeding the upper limit; wherein, the second cycle is obtained by dividing the first cycle by time according to the first frequency; when the data statistical operation is performed for the first time, the current second cycle is the first second cycle within the first cycle;

[0012] When the first duration is greater than a preset first duration threshold and the second duration is greater than a preset second duration threshold, the value of the first number is increased by 1; wherein the initial value of the first number is 0;

[0013] When the third duration is greater than the preset third duration threshold and the fourth duration is greater than the preset fourth duration threshold, the value of the second number is increased by 1; wherein the initial value of the second number is 0;

[0014] The next second cycle is used as the second cycle of the next data statistics operation.

[0015] As a preferred solution, the acquisition, within the preset second cycle, of the first duration of the first voltage level bus running beyond the upper limit, the second duration of the second voltage level bus running beyond the lower limit, the third duration of the first voltage level bus running beyond the lower limit, and the fourth duration of the second voltage level bus running beyond the upper limit, includes:

[0016] In the second cycle, the data collection operation is repeatedly performed several times according to the preset second frequency until the current second cycle ends, and the first duration of the operation of the first voltage level bus exceeding the upper limit, the second duration of the operation of the second voltage level bus exceeding the lower limit, the third duration of the operation of the first voltage level bus exceeding the lower limit, and the fourth duration of the operation of the second voltage level bus exceeding the upper limit are obtained in the second cycle;

[0017] The data collection operation includes:

[0018] Obtain, in the current third cycle, the first voltage operation upper limit of the first voltage level bus, the first voltage operation lower limit of the first voltage level bus, the first voltage operation reference value of the first voltage level bus, the first real-time voltage of the first voltage level bus, the second voltage operation upper limit of the second voltage level bus, the second voltage operation lower limit of the second voltage level bus, the second voltage operation reference value of the second voltage level bus, and the second real-time voltage of the second voltage level bus in real time; wherein, the third cycle is obtained by dividing the second cycle by time according to the second frequency; when the data acquisition operation is performed for the first time, the current third cycle is the first third cycle within the second cycle;

[0019] According to the first voltage operation upper limit, the first voltage operation reference value and the first real-time voltage, determine whether the first voltage level bus is operating beyond the upper limit in the current third period, and if so, add the first duration and the third period, and use the addition result to update the first duration; wherein the initial value of the first duration is 0;

[0020] According to the second voltage operation lower limit, the second voltage operation reference value and the second real-time voltage, determine whether the second voltage level bus is operating beyond the lower limit in the current third period, and if so, add the second time length and the third period, and use the addition result to update the second time length; wherein the initial value of the second time length is 0;

[0021] According to the first voltage operation lower limit, the first voltage operation reference value and the first real-time voltage, determine whether the first voltage level bus is operating beyond the lower limit in the current third period, and if so, add the third time length and the third period, and use the addition result to update the third time length; wherein the initial value of the third time length is 0;

[0022] Based on the second voltage operating upper limit, the second voltage operating reference value and the second real-time voltage, determine whether the second voltage level bus is operating above the upper limit in the current third period. If so, add the fourth time duration and the third period, and use the addition result to update the fourth time duration; wherein the initial value of the fourth time duration is 0.

[0023] As a preferred solution, judging whether the first voltage level bus operates beyond the upper limit in the current third cycle according to the first voltage operation upper limit, the first voltage operation reference value and the first real-time voltage includes:

[0024] According to the first voltage operation upper limit, the first voltage operation reference value and the first real-time voltage, a first voltage level bus upper limit judgment index is calculated by a first upper limit judgment index calculation formula;

[0025] If the first voltage level bus exceeds the upper limit judgment index greater than the preset first index threshold, it is judged that the first voltage level bus is operating beyond the upper limit in the third cycle; otherwise, it is judged that the first voltage level bus is not operating beyond the upper limit in the third cycle;

[0026] The calculation formula of the first upper limit judgment index is:

[0027]

[0028] In the formula, a represents the first upper limit judgment index; Indicates the first real-time voltage; Indicates the upper limit of the first voltage operation; Indicates the first voltage operating reference value; K c Indicates the bus voltage measurement over-limit coefficient.

[0029] As a preferred solution, judging whether the second voltage level bus operates beyond the lower limit in the current third cycle according to the second voltage operation lower limit, the second voltage operation reference value and the second real-time voltage includes:

[0030] According to the second voltage operation lower limit, the second voltage operation reference value and the second real-time voltage, the second voltage level busbar lower limit judgment index is calculated by the first lower limit judgment index calculation formula;

[0031] If the second voltage level busbar is less than the preset second indicator threshold, it is judged that the second voltage level busbar is running beyond the lower limit in the third cycle; otherwise, it is judged that the second voltage level busbar is not running beyond the lower limit in the third cycle;

[0032] The calculation formula of the first lower limit judgment index is:

[0033]

[0034] In the formula, b represents the first lower limit judgment index; Indicates the second real-time voltage; Indicates the second voltage operating lower limit; Indicates the second voltage operating reference value; K c Indicates the bus voltage measurement over-limit coefficient.

[0035] As a preferred solution, judging whether the first voltage level bus operates beyond the lower limit in the current third cycle according to the first voltage operation lower limit, the first voltage operation reference value and the first real-time voltage includes:

[0036] According to the first voltage operation lower limit, the first voltage operation reference value and the first real-time voltage, the first voltage level busbar lower limit judgment index is calculated by the second lower limit judgment index calculation formula;

[0037] If the first voltage level busbar crossing the lower limit judgment index is less than the preset third index threshold, it is judged that the first voltage level busbar is running across the lower limit in the third cycle; otherwise, it is judged that the first voltage level busbar is not running across the lower limit in the third cycle;

[0038] The calculation formula of the second lower limit judgment index is:

[0039]

[0040] In the formula, c represents the second lower limit judgment index; Indicates the first real-time voltage; Indicates the first voltage operating lower limit; Indicates the first voltage operating reference value; K c Indicates the bus voltage measurement over-limit coefficient.

[0041] As a preferred solution, judging whether the second voltage level bus operates beyond the upper limit in the current third cycle according to the second voltage operation upper limit, the second voltage operation reference value and the second real-time voltage includes:

[0042] According to the second voltage operation upper limit, the second voltage operation reference value and the second real-time voltage, a second voltage level busbar upper limit judgment index is calculated by a second upper limit judgment index calculation formula;

[0043] If the second voltage level bus exceeds the upper limit judgment index greater than the preset fourth index threshold, it is judged that the second voltage level bus is operating beyond the upper limit in the third cycle; otherwise, it is judged that the second voltage level bus is not operating beyond the upper limit in the third cycle;

[0044] The calculation formula of the second upper limit judgment index is:

[0045]

[0046] In the formula, d represents the second upper limit judgment index; Indicates the second real-time voltage; Indicates the second voltage operating upper limit; Indicates the second voltage operating reference value; K c Indicates the bus voltage measurement over-limit coefficient.

[0047] On the basis of the above-mentioned embodiment, another embodiment of the present invention provides a no-load voltage regulating tap adjustment device, comprising: a data acquisition module and a no-load voltage regulating tap adjustment module;

[0048] The data acquisition module is used to acquire, within a preset first period, a first number of times that the first voltage level bus exceeds the upper limit and the second voltage level bus exceeds the lower limit and the second number of times that the first voltage level bus exceeds the lower limit and the second voltage level bus exceeds the upper limit and the timeout;

[0049] The no-load voltage regulating tap adjustment module is used to reduce the gear position of the no-load voltage regulating tap of the first voltage level main transformer when the first number is greater than the preset first number threshold; and to increase the gear position of the no-load voltage regulating tap of the first voltage level main transformer when the second number is greater than the preset second number threshold.

[0050] Based on the above embodiments, another embodiment of the present invention provides a terminal device, which includes a processor, a memory, and a computer program stored in the memory and configured to be executed by the processor. When the processor executes the computer program, the no-load tap changer adjustment method described in the above embodiments of the invention is implemented.

[0051] Based on the above embodiment, another embodiment of the present invention provides a storage medium, wherein the storage medium includes a stored computer program, wherein when the computer program is running, the device where the storage medium is located is controlled to execute the no-load tap changer adjustment method described in the above invention embodiment.

[0052] Compared with the prior art, the embodiments of the present invention have the following beneficial effects:

[0053] The present invention obtains the first number of times that the first voltage level busbar exceeds the upper limit and the second voltage level busbar exceeds the lower limit, and the second number of times that the first voltage level busbar exceeds the lower limit and the second voltage level busbar exceeds the upper limit within a preset first cycle; when the first number is greater than the preset first number threshold, the gear position of the no-load voltage regulating tap of the first voltage level main transformer is reduced; when the second number is greater than the preset second number threshold, the gear position of the no-load voltage regulating tap of the first voltage level main transformer is increased. The present invention reduces the gear position of the no-load voltage regulating tap of the first voltage level main transformer when the first voltage level busbar exceeds the upper limit and the second voltage level busbar exceeds the lower limit, and increases the gear position of the no-load voltage regulating tap of the first voltage level main transformer when the first voltage level busbar exceeds the lower limit and the second voltage level busbar exceeds the upper limit. Through the adjustment method of the present invention, the voltage distribution on each side of the transformer is basically reasonable, achieving the purpose of improving the system voltage quality and maintaining the safety and stability of the power grid. BRIEF DESCRIPTION OF THE DRAWINGS

[0054] Figure 1 It is a flow chart of a method for adjusting a no-load voltage regulating tap provided by an embodiment of the present invention;

[0055] Figure 2 The present invention is a schematic structural diagram of a no-load voltage regulating tap adjustment device provided in one embodiment of the present invention. DETAILED DESCRIPTION

[0056] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0057] Embodiment 1

[0058] Please refer to Figure 1 , is a flow chart of a no-load voltage regulating tap adjustment method provided by an embodiment of the present invention, comprising:

[0059] S1. Obtain, within a preset first cycle, the first number of times the first voltage level bus times out at an upper limit and the second voltage level bus times out at a lower limit, and the second number of times the first voltage level bus times out at a lower limit and the second level bus times out at an upper limit.

[0060] It should be noted that the first voltage level bus generally refers to the 500kV bus, and the second voltage level bus generally refers to the 220kV bus.

[0061] The present invention involves a total of three cycles, namely, the first cycle, the second cycle and the third cycle. The first cycle refers to the decision cycle, which is generally one day; the second cycle refers to the statistical cycle, which is generally one hour; the third cycle refers to the data collection cycle, which is generally one minute or five minutes. The first cycle can be equally divided into several consecutive second cycles, and the second cycle can be equally divided into several consecutive third cycles.

[0062] If a behavior exceeds a certain time ratio in a certain time period, it is recorded as a timeout. The number of timeouts is used to count the number of timeouts in several time periods.

[0063] In step S1, when a first cycle ends, the first number and the second number in the first cycle are obtained. The first number refers to the number of times that the first voltage level bus exceeds the upper limit and the second voltage level bus exceeds the lower limit in the first cycle. The second number refers to the number of times that the first voltage level bus exceeds the lower limit and the second voltage level bus exceeds the upper limit in the first cycle.

[0064] In a preferred embodiment, the obtaining, within a preset first cycle, a first number of times that the first voltage level bus exceeds the upper limit and the second voltage level bus exceeds the lower limit and the second number of times that the first voltage level bus exceeds the lower limit and the second level bus exceeds the upper limit and the timeout, includes:

[0065] In the first cycle, repeatedly perform data statistical operations several times according to a preset first frequency until the first cycle ends, and obtain the first number of times the first voltage level bus runs for a long time above the upper limit and the second voltage level bus runs for a long time above the lower limit in the first cycle, and the second number of times the first voltage level bus runs for a long time above the lower limit and the second voltage level bus runs for a long time above the upper limit;

[0066] The data statistics operation includes:

[0067] Obtain, in the current second cycle, the first duration of the operation of the first voltage level bus exceeding the upper limit, the second duration of the operation of the second voltage level bus exceeding the lower limit, the third duration of the operation of the first voltage level bus exceeding the lower limit, and the fourth duration of the operation of the second voltage level bus exceeding the upper limit; wherein, the second cycle is obtained by dividing the first cycle by time according to the first frequency; when the data statistical operation is performed for the first time, the current second cycle is the first second cycle within the first cycle;

[0068] When the first duration is greater than a preset first duration threshold and the second duration is greater than a preset second duration threshold, the value of the first number is increased by 1; wherein the initial value of the first number is 0;

[0069] When the third duration is greater than the preset third duration threshold and the fourth duration is greater than the preset fourth duration threshold, the value of the second number is increased by 1; wherein the initial value of the second number is 0;

[0070] The next second cycle is used as the second cycle of the next data statistics operation.

[0071] In this embodiment, in order to obtain the first number and the second number, it is necessary to count the number of occurrences of the above two timeout situations in the first cycle. For this purpose, the first cycle is divided into a number of consecutive second cycles, and the frequency of the second cycle update is the frequency of performing the data statistics operation, that is, the first frequency.

[0072] According to the sequence of all the second cycles in the first cycle, a data statistics operation is performed once for each second cycle.

[0073] In each data statistics operation, the first duration, second duration, third duration and fourth duration in the second cycle corresponding to the data statistics operation are obtained. Among them, the first duration refers to the duration of the first voltage level bus running beyond the upper limit, the second duration refers to the duration of the second voltage level bus running beyond the lower limit, the third duration refers to the duration of the first voltage level bus running beyond the lower limit, and the fourth duration refers to the duration of the second voltage level bus running beyond the upper limit.

[0074] When the first time duration is greater than the preset first time duration threshold and the second time duration is greater than the preset second time duration threshold, it is considered that within the second cycle, there has been a situation in which the first voltage level bus has timed out beyond the upper limit and the second voltage level bus has timed out beyond the lower limit, then the value of the first number is increased by 1.

[0075] When the third time duration is greater than the preset third time duration threshold and the fourth time duration is greater than the preset fourth time duration threshold, it is considered that within the second cycle, there has been a situation in which the first voltage level bus has timed out at the lower limit and the second voltage level bus has timed out at the upper limit, and then the value of the second number is increased by 1.

[0076] In a preferred embodiment, the obtaining, within a preset second cycle, a first duration for the first voltage level bus to operate beyond the upper limit, a second duration for the second voltage level bus to operate beyond the lower limit, a third duration for the first voltage level bus to operate beyond the lower limit, and a fourth duration for the second voltage level bus to operate beyond the upper limit, comprises:

[0077] In the second cycle, the data collection operation is repeatedly performed several times according to the preset second frequency until the current second cycle ends, and the first duration of the operation of the first voltage level bus exceeding the upper limit, the second duration of the operation of the second voltage level bus exceeding the lower limit, the third duration of the operation of the first voltage level bus exceeding the lower limit, and the fourth duration of the operation of the second voltage level bus exceeding the upper limit are obtained in the second cycle;

[0078] The data collection operation includes:

[0079] Obtain, in the current third cycle, the first voltage operation upper limit of the first voltage level bus, the first voltage operation lower limit of the first voltage level bus, the first voltage operation reference value of the first voltage level bus, the first real-time voltage of the first voltage level bus, the second voltage operation upper limit of the second voltage level bus, the second voltage operation lower limit of the second voltage level bus, the second voltage operation reference value of the second voltage level bus, and the second real-time voltage of the second voltage level bus in real time; wherein, the third cycle is obtained by dividing the second cycle by time according to the second frequency; when the data acquisition operation is performed for the first time, the current third cycle is the first third cycle within the second cycle;

[0080] According to the first voltage operation upper limit, the first voltage operation reference value and the first real-time voltage, determine whether the first voltage level bus is operating beyond the upper limit in the current third period, and if so, add the first duration and the third period, and use the addition result to update the first duration; wherein the initial value of the first duration is 0;

[0081] According to the second voltage operation lower limit, the second voltage operation reference value and the second real-time voltage, determine whether the second voltage level bus is operating beyond the lower limit in the current third period, and if so, add the second time length and the third period, and use the addition result to update the second time length; wherein the initial value of the second time length is 0;

[0082] According to the first voltage operation lower limit, the first voltage operation reference value and the first real-time voltage, determine whether the first voltage level bus is operating beyond the lower limit in the current third period, and if so, add the third time length and the third period, and use the addition result to update the third time length; wherein the initial value of the third time length is 0;

[0083] Based on the second voltage operating upper limit, the second voltage operating reference value and the second real-time voltage, determine whether the second voltage level bus is operating above the upper limit in the current third period. If so, add the fourth time duration and the third period, and use the addition result to update the fourth time duration; wherein the initial value of the fourth time duration is 0.

[0084] In this embodiment, in order to obtain the first duration, second duration, third duration and fourth duration corresponding to each second period, the second period is divided into several consecutive third periods, and the frequency of updating the third period is the frequency of executing the data acquisition operation, that is, the second frequency.

[0085] According to the sequence of all third cycles within the second cycle, a data collection operation is performed for each cycle.

[0086] In each data acquisition operation, the first voltage operation upper limit, the first voltage operation lower limit, the first voltage operation reference value, the first real-time voltage, the second voltage operation upper limit, the second voltage operation lower limit, the second voltage operation reference value, and the second real-time voltage in the third period corresponding to the data acquisition operation are obtained. Among them, the first voltage operation upper limit refers to the voltage operation upper limit of the first voltage level bus, the first voltage operation lower limit refers to the voltage operation lower limit of the first voltage level bus, the first voltage operation reference value refers to the voltage operation reference value of the first voltage level bus, the first real-time voltage refers to the real-time voltage of the first voltage level bus, the second voltage operation upper limit refers to the voltage operation upper limit of the second voltage level bus, the second voltage operation lower limit refers to the voltage operation lower limit of the second voltage level bus, the second voltage operation reference value refers to the voltage operation reference value of the second voltage level bus, and the second real-time voltage refers to the real-time voltage of the second voltage level bus.

[0087] Based on the first voltage operating upper limit, the first voltage operating reference value and the first real-time voltage, determine whether the first voltage level bus operates above the upper limit in the current third cycle. If so, increase the duration of the third cycle to the first duration.

[0088] According to the second voltage operating lower limit, the second voltage operating reference value and the second real-time voltage, determine whether the second voltage level bus operates beyond the lower limit in the current third cycle. If so, add the duration of the third cycle to the second duration.

[0089] According to the first voltage operating lower limit, the first voltage operating reference value and the first real-time voltage, determine whether the first voltage level bus operates beyond the lower limit in the current third cycle. If so, increase the duration of the third cycle to the third time length.

[0090] Based on the second voltage operating lower limit, the second voltage operating reference value and the second real-time voltage, determine whether the second voltage level bus operates above the upper limit in the current third cycle. If so, add the duration of the third cycle to the fourth time duration.

[0091] At the end of each data collection operation, the first duration, the second duration, the third duration and the fourth duration are reset to an initial value of 0.

[0092] In a preferred embodiment, judging whether the first voltage level bus operates beyond the upper limit in the current third cycle according to the first voltage operation upper limit, the first voltage operation reference value and the first real-time voltage includes:

[0093] According to the first voltage operation upper limit, the first voltage operation reference value and the first real-time voltage, a first voltage level bus upper limit judgment index is calculated by a first upper limit judgment index calculation formula;

[0094] If the first voltage level bus exceeds the upper limit judgment index greater than the preset first index threshold, it is judged that the first voltage level bus is operating beyond the upper limit in the third cycle; otherwise, it is judged that the first voltage level bus is not operating beyond the upper limit in the third cycle;

[0095] The calculation formula of the first upper limit judgment index is:

[0096]

[0097] In the formula, a represents the first upper limit judgment index; Indicates the first real-time voltage; Indicates the upper limit of the first voltage operation; Indicates the first voltage operating reference value; K c Indicates the bus voltage measurement over-limit coefficient.

[0098] In this embodiment, according to the first voltage operation upper limit, the first voltage operation reference value and the first real-time voltage, the upper limit judgment index of the first voltage level bus is calculated by the upper limit judgment index calculation formula. If the upper limit judgment index of the first voltage level bus is greater than the preset first index threshold, it is judged that the first voltage level bus is operating above the upper limit in the third period.

[0099] K c The general value is 0.003, which can be adjusted manually according to actual conditions.

[0100] In a preferred embodiment, judging whether the second voltage level bus operates beyond the lower limit in the current third cycle according to the second voltage operation lower limit, the second voltage operation reference value and the second real-time voltage includes:

[0101] According to the second voltage operation lower limit, the second voltage operation reference value and the second real-time voltage, the second voltage level busbar lower limit judgment index is calculated by the first lower limit judgment index calculation formula;

[0102] If the second voltage level busbar is less than the preset second indicator threshold, it is judged that the second voltage level busbar is running beyond the lower limit in the third cycle; otherwise, it is judged that the second voltage level busbar is not running beyond the lower limit in the third cycle;

[0103] The calculation formula of the first lower limit judgment index is:

[0104]

[0105] In the formula, b represents the first lower limit judgment index; Indicates the second real-time voltage; Indicates the second voltage operating lower limit; Indicates the second voltage operating reference value; K c Indicates the bus voltage measurement over-limit coefficient.

[0106] In this embodiment, according to the second voltage operation lower limit, the second voltage operation reference value and the second real-time voltage, the second voltage level busbar lower limit judgment index is calculated by the lower limit judgment index calculation formula. If the second voltage level busbar lower limit judgment index is less than the preset second index threshold, it is judged that the second voltage level busbar is running at the lower limit in the third period.

[0107] In a preferred embodiment, judging whether the first voltage level bus operates beyond the lower limit in the current third cycle according to the first voltage operation lower limit, the first voltage operation reference value and the first real-time voltage includes:

[0108] According to the first voltage operation lower limit, the first voltage operation reference value and the first real-time voltage, the first voltage level busbar lower limit judgment index is calculated by the second lower limit judgment index calculation formula;

[0109] If the first voltage level busbar crossing the lower limit judgment index is less than the preset third index threshold, it is judged that the first voltage level busbar is running across the lower limit in the third cycle; otherwise, it is judged that the first voltage level busbar is not running across the lower limit in the third cycle;

[0110] The calculation formula of the second lower limit judgment index is:

[0111]

[0112] In the formula, c represents the second lower limit judgment index; Indicates the first real-time voltage; Indicates the first voltage operating lower limit; Indicates the first voltage operating reference value; K c Indicates the bus voltage measurement over-limit coefficient.

[0113] In this embodiment, according to the first voltage operation lower limit, the first voltage operation reference value and the first real-time voltage, the first voltage level busbar lower limit judgment index is calculated by the lower limit judgment index calculation formula. If the first voltage level busbar lower limit judgment index is less than the preset third index threshold, it is judged that the first voltage level busbar is running at the lower limit in the third period.

[0114] In a preferred embodiment, judging whether the second voltage level bus operates beyond the upper limit in the current third cycle according to the second voltage operation upper limit, the second voltage operation reference value and the second real-time voltage includes:

[0115] According to the second voltage operation upper limit, the second voltage operation reference value and the second real-time voltage, a second voltage level busbar upper limit judgment index is calculated by a second upper limit judgment index calculation formula;

[0116] If the second voltage level bus exceeds the upper limit judgment index greater than the preset fourth index threshold, it is judged that the second voltage level bus is operating beyond the upper limit in the third cycle; otherwise, it is judged that the second voltage level bus is not operating beyond the upper limit in the third cycle;

[0117] The calculation formula of the second upper limit judgment index is:

[0118]

[0119] In the formula, d represents the second upper limit judgment index; Indicates the second real-time voltage; Indicates the second voltage operating upper limit; Indicates the second voltage operating reference value; K c Indicates the bus voltage measurement over-limit coefficient.

[0120] In this embodiment, according to the second voltage operation upper limit, the second voltage operation reference value and the second real-time voltage, the second voltage level bus upper limit judgment index is calculated by the upper limit judgment index calculation formula. If the second voltage level bus upper limit judgment index is greater than the preset fourth index threshold, it is judged that the first voltage level bus is operating above the upper limit in the third period.

[0121] S2. When the first number is greater than the preset first number threshold, the gear position of the no-load voltage regulating tap of the first voltage level main transformer is reduced; when the second number is greater than the preset second number threshold, the gear position of the no-load voltage regulating tap of the first voltage level main transformer is increased.

[0122] In step S2, when the first number is greater than the preset first number threshold, it is considered that the voltage of the first voltage level bus is too high for a long time and the voltage of the second voltage level bus is too low for a long time, then the gear of the no-load tap changer of the first voltage level main transformer is reduced to reduce the voltage of the first voltage level and increase the voltage of the second voltage level.

[0123] When the second number is greater than the preset second number threshold, it is considered that the voltage of the first voltage level bus is too low for a long time and the voltage of the second voltage level bus is too high for a long time, then the gear position of the no-load tap changer of the first voltage level main transformer is increased to increase the voltage of the first voltage level and reduce the voltage of the second voltage level.

[0124] It should be noted that the no-load voltage tap adjustment method provided by the present invention is aimed at the problem that the current transformer main transformer tap position is unreasonable, resulting in the high-voltage side bus voltage of the transformer substation being too high or too low for a long time, and the low-voltage side bus voltage being too low or too high for a long time. Through the adjustment method of the present invention, the voltage distribution on each side of the transformer is basically reasonable, so as to achieve the purpose of improving the system voltage quality and maintaining the safety and stability of the power grid. In addition, the present invention also has the advantages of fast speed, high accuracy and saving labor costs.

[0125] Embodiment 2

[0126] Please refer to Figure 2 , is a structural schematic diagram of a no-load voltage tap adjustment device provided by an embodiment of the present invention, comprising: a data acquisition module and a no-load voltage tap adjustment module;

[0127] The data acquisition module is used to acquire, within a preset first period, a first number of times that the first voltage level bus exceeds the upper limit and the second voltage level bus exceeds the lower limit and the second number of times that the first voltage level bus exceeds the lower limit and the second voltage level bus exceeds the upper limit and the timeout;

[0128] The no-load voltage regulating tap adjustment module is used to reduce the gear position of the no-load voltage regulating tap of the first voltage level main transformer when the first number is greater than the preset first number threshold; and to increase the gear position of the no-load voltage regulating tap of the first voltage level main transformer when the second number is greater than the preset second number threshold.

[0129] Embodiment 3

[0130] Accordingly, an embodiment of the present invention provides a terminal device, which includes a processor, a memory, and a computer program stored in the memory and configured to be executed by the processor, and when the processor executes the computer program, the no-load tap changer adjustment method described in the above-mentioned embodiment of the invention is implemented.

[0131] Embodiment 4

[0132] Accordingly, an embodiment of the present invention provides a storage medium, which includes a stored computer program, wherein when the computer program is running, the device where the storage medium is located is controlled to execute the no-load tap changer adjustment method described in the above embodiment of the invention.

[0133] It should be noted that the device embodiments described above are merely schematic, wherein the units described as separate components may or may not be physically separated, and the components displayed as units may or may not be physical units, that is, they may be located in one place, or they may be distributed on multiple network units. Some or all of the modules may be selected according to actual needs to achieve the purpose of the scheme of this embodiment. In addition, in the accompanying drawings of the device embodiments provided by the present invention, the connection relationship between the modules indicates that there is a communication connection between them, which may be specifically implemented as one or more communication buses or signal lines. A person of ordinary skill in the art may understand and implement it without paying any creative effort.

[0134] Those skilled in the art can clearly understand that for the sake of convenience and brevity, the specific working process of the device described above can refer to the corresponding process in the aforementioned method embodiment, and will not be repeated here.

[0135] The terminal device may be a computing device such as a desktop computer, a notebook, a PDA, a cloud server, etc. The terminal device may include, but is not limited to, a processor and a memory.

[0136] The processor may be a central processing unit (CPU), or other general-purpose processors, a digital signal processor (DSP), an application-specific integrated circuit (ASIC), a field-programmable gate array (FPGA), or other programmable logic devices, discrete gate or transistor logic devices, discrete hardware components, etc. A general-purpose processor may be a microprocessor or any conventional processor, etc. The processor is the control center of the device, and various interfaces and lines are used to connect various parts of the entire device.

[0137] The memory can be used to store the computer program, and the processor realizes various functions of the device by running or executing the computer program stored in the memory and calling the data stored in the memory. The memory can mainly include a program storage area and a data storage area, wherein the program storage area can store an operating system, at least one application required for a function, etc.; the data storage area can store data created according to the use of the mobile phone, etc. In addition, the memory can include a high-speed random access memory, and can also include a non-volatile memory, such as a hard disk, a memory, a plug-in hard disk, a smart memory card (Smart Med ia Card, SMC), a secure digital (Secure Digital, SD) card, a flash card (Fl ash Card), at least one disk storage device, a flash memory device, or other volatile solid-state storage devices.

[0138] The storage medium is a storage medium, and the computer program is stored in the storage medium. When the computer program is executed by the processor, the steps of each method embodiment described above can be implemented. Among them, the computer program includes computer program code, and the computer program code can be in source code form, object code form, executable file or some intermediate form, etc. The computer readable medium may include: any entity or device capable of carrying the computer program code, recording medium, USB flash drive, mobile hard disk, disk, optical disk, computer memory, read-only memory (ROM, Read-On l yMemory), random access memory (RAM, Random Access Memory), electric carrier signal, telecommunication signal and software distribution medium, etc. It should be noted that the content contained in the computer readable medium can be appropriately increased or decreased according to the requirements of legislation and patent practice in the jurisdiction. For example, in some jurisdictions, according to legislation and patent practice, computer readable media do not include electric carrier signals and telecommunication signals.

[0139] The above is a preferred embodiment of the present invention. It should be pointed out that a person skilled in the art can make several improvements and modifications without departing from the principle of the present invention. These improvements and modifications are also considered to be within the scope of protection of the present invention.

Claims

1. A method for adjusting a no-load voltage regulating tap, characterized in that: include: Obtain the first number of times that the first voltage level busbar times out of the upper limit and the second voltage level busbar times out of the lower limit within a preset first cycle, and the second number of times that the first voltage level busbar times out of the lower limit and the second voltage level busbar times out of the upper limit; When the first number is greater than the preset first number threshold, the gear position of the no-load voltage regulating tap of the first voltage level main transformer is reduced; when the second number is greater than the preset second number threshold, the gear position of the no-load voltage regulating tap of the first voltage level main transformer is increased.

2. The no-load voltage tap adjustment method according to claim 1, characterized in that: The obtaining, within a preset first cycle, a first number of times that the first voltage level busbar timed out when the upper limit was exceeded and a second number of times that the first voltage level busbar timed out when the lower limit was exceeded and a second number of times that the first voltage level busbar timed out when the lower limit was exceeded and a second level busbar timed out when the upper limit was exceeded, includes: In the first cycle, repeatedly perform data statistical operations several times according to a preset first frequency until the first cycle ends, and obtain the first number of times the first voltage level bus runs for a long time above the upper limit and the second voltage level bus runs for a long time above the lower limit in the first cycle, and the second number of times the first voltage level bus runs for a long time above the lower limit and the second voltage level bus runs for a long time above the upper limit; The data statistics operation includes: Obtain, in the current second cycle, the first duration of the operation of the first voltage level bus exceeding the upper limit, the second duration of the operation of the second voltage level bus exceeding the lower limit, the third duration of the operation of the first voltage level bus exceeding the lower limit, and the fourth duration of the operation of the second voltage level bus exceeding the upper limit; wherein, the second cycle is obtained by dividing the first cycle by time according to the first frequency; when the data statistical operation is performed for the first time, the current second cycle is the first second cycle within the first cycle; When the first duration is greater than a preset first duration threshold and the second duration is greater than a preset second duration threshold, the value of the first number is increased by 1; wherein the initial value of the first number is 0; When the third duration is greater than the preset third duration threshold and the fourth duration is greater than the preset fourth duration threshold, the value of the second number is increased by 1; wherein the initial value of the second number is 0; The next second cycle is used as the second cycle of the next data statistics operation.

3. The no-load voltage tap adjustment method according to claim 2, characterized in that: The obtaining, within a preset second cycle, a first duration for which the first voltage level bus operates beyond the upper limit, a second duration for which the second voltage level bus operates beyond the lower limit, a third duration for which the first voltage level bus operates beyond the lower limit, and a fourth duration for which the second voltage level bus operates beyond the upper limit, comprises: In the second cycle, the data collection operation is repeatedly performed several times according to the preset second frequency until the current second cycle ends, and the first duration of the operation of the first voltage level bus exceeding the upper limit, the second duration of the operation of the second voltage level bus exceeding the lower limit, the third duration of the operation of the first voltage level bus exceeding the lower limit, and the fourth duration of the operation of the second voltage level bus exceeding the upper limit are obtained in the second cycle; The data collection operation includes: Obtain, in the current third cycle, the first voltage operation upper limit of the first voltage level bus, the first voltage operation lower limit of the first voltage level bus, the first voltage operation reference value of the first voltage level bus, the first real-time voltage of the first voltage level bus, the second voltage operation upper limit of the second voltage level bus, the second voltage operation lower limit of the second voltage level bus, the second voltage operation reference value of the second voltage level bus, and the second real-time voltage of the second voltage level bus in real time; wherein, the third cycle is obtained by dividing the second cycle by time according to the second frequency; when the data acquisition operation is performed for the first time, the current third cycle is the first third cycle within the second cycle; According to the first voltage operation upper limit, the first voltage operation reference value and the first real-time voltage, determine whether the first voltage level bus is operating beyond the upper limit in the current third period, and if so, add the first duration and the third period, and use the addition result to update the first duration; wherein the initial value of the first duration is 0; According to the second voltage operation lower limit, the second voltage operation reference value and the second real-time voltage, determine whether the second voltage level bus is operating beyond the lower limit in the current third period, and if so, add the second time length and the third period, and use the addition result to update the second time length; wherein the initial value of the second time length is 0; According to the first voltage operation lower limit, the first voltage operation reference value and the first real-time voltage, determine whether the first voltage level bus is operating beyond the lower limit in the current third period, and if so, add the third time length and the third period, and use the addition result to update the third time length; wherein the initial value of the third time length is 0; Based on the second voltage operating upper limit, the second voltage operating reference value and the second real-time voltage, determine whether the second voltage level bus is operating above the upper limit in the current third period. If so, add the fourth time duration and the third period, and use the addition result to update the fourth time duration; wherein the initial value of the fourth time duration is 0.

4. The no-load voltage regulating tap adjustment method according to claim 3, characterized in that: The determining, according to the first voltage operation upper limit, the first voltage operation reference value and the first real-time voltage, whether the first voltage level bus operates beyond the upper limit in the current third cycle includes: According to the first voltage operation upper limit, the first voltage operation reference value and the first real-time voltage, a first voltage level bus upper limit judgment index is calculated by a first upper limit judgment index calculation formula; If the first voltage level bus exceeds the upper limit judgment index greater than the preset first index threshold, it is judged that the first voltage level bus is operating beyond the upper limit in the third cycle; otherwise, it is judged that the first voltage level bus is not operating beyond the upper limit in the third cycle; The calculation formula of the first upper limit judgment index is: In the formula, a represents the first upper limit judgment index; Indicates the first real-time voltage; Indicates the upper limit of the first voltage operation; Indicates the first voltage operating reference value; K c Indicates the bus voltage measurement over-limit coefficient.

5. The no-load voltage tap adjustment method according to claim 3, characterized in that: The step of judging whether the second voltage level bus operates beyond the lower limit in the current third cycle according to the second voltage operation lower limit, the second voltage operation reference value, and the second real-time voltage includes: According to the second voltage operation lower limit, the second voltage operation reference value and the second real-time voltage, the second voltage level busbar lower limit judgment index is calculated by the first lower limit judgment index calculation formula; If the second voltage level busbar is less than the preset second indicator threshold, it is judged that the second voltage level busbar is running beyond the lower limit in the third cycle; otherwise, it is judged that the second voltage level busbar is not running beyond the lower limit in the third cycle; The calculation formula of the first lower limit judgment index is: In the formula, b represents the first lower limit judgment index; Indicates the second real-time voltage; Indicates the second voltage operating lower limit; Indicates the second voltage operating reference value; K c Indicates the bus voltage measurement over-limit coefficient.

6. The no-load voltage regulating tap adjustment method according to claim 3, characterized in that: The determining, according to the first voltage operation lower limit, the first voltage operation reference value and the first real-time voltage, whether the first voltage level bus operates beyond the lower limit in the current third cycle includes: According to the first voltage operation lower limit, the first voltage operation reference value and the first real-time voltage, the first voltage level busbar lower limit judgment index is calculated by the second lower limit judgment index calculation formula; If the first voltage level busbar crossing the lower limit judgment index is less than the preset third index threshold, it is judged that the first voltage level busbar is running across the lower limit in the third cycle; otherwise, it is judged that the first voltage level busbar is not running across the lower limit in the third cycle; The calculation formula of the second lower limit judgment index is: In the formula, c represents the second lower limit judgment index; Indicates the first real-time voltage; Indicates the first voltage operating lower limit; Indicates the first voltage operating reference value; K c Indicates the bus voltage measurement over-limit coefficient.

7. The no-load voltage regulating tap adjustment method according to claim 3, characterized in that: The determining, according to the second voltage operation upper limit, the second voltage operation reference value and the second real-time voltage, whether the second voltage level bus operates beyond the upper limit in the current third cycle includes: According to the second voltage operation upper limit, the second voltage operation reference value and the second real-time voltage, a second voltage level busbar upper limit judgment index is calculated by a second upper limit judgment index calculation formula; If the second voltage level bus exceeds the upper limit judgment index greater than the preset fourth index threshold, it is judged that the second voltage level bus is operating beyond the upper limit in the third cycle; otherwise, it is judged that the second voltage level bus is not operating beyond the upper limit in the third cycle; The calculation formula of the second upper limit judgment index is: In the formula, d represents the second upper limit judgment index; Indicates the second real-time voltage; Indicates the second voltage operating upper limit; Indicates the second voltage operating reference value; K c Indicates the bus voltage measurement over-limit coefficient.

8. A no-load voltage tap adjustment device, characterized in that: include: Data acquisition module and no-load voltage tap adjustment module; The data acquisition module is used to acquire, within a preset first period, a first number of times that the first voltage level bus exceeds the upper limit and the second voltage level bus exceeds the lower limit and the second number of times that the first voltage level bus exceeds the lower limit and the second voltage level bus exceeds the upper limit and the timeout; The no-load voltage regulating tap adjustment module is used to reduce the gear position of the no-load voltage regulating tap of the first voltage level main transformer when the first number is greater than the preset first number threshold; and to increase the gear position of the no-load voltage regulating tap of the first voltage level main transformer when the second number is greater than the preset second number threshold.

9. A terminal device, characterized in that: The invention comprises a processor, a memory and a computer program stored in the memory and configured to be executed by the processor, wherein when the processor executes the computer program, the no-load tap changer adjustment method according to any one of claims 1 to 7 is implemented.

10. A storage medium, characterized in that: The storage medium includes a stored computer program, wherein when the computer program is executed, the device where the storage medium is located is controlled to execute the no-load tap changer adjustment method according to any one of claims 1 to 7.

Images