Method, device and equipment for preventing abrupt change of bus voltage with feeder line and storage medium

Abstract

This invention discloses a method, apparatus, device, and storage medium for preventing sudden voltage changes in feeder bus systems. One method includes: acquiring operating parameters of power equipment, including an initial bus and initial main transformer requiring load transfer, and a target bus and target main transformer to which load transfer is being performed; confirming the tap difference between the initial main transformer and the target main transformer and the voltage change of the target main transformer during load transfer based on the operating parameters; and setting a five-prevention interlocking logic for the load transfer operation of the initial bus and initial main transformer based on the tap difference and voltage change. By setting the five-prevention interlocking logic based on the tap difference and voltage change, the closing and opening operations of the sectionalizing switch and the low-voltage switch are executed when the logic requirements are met, preventing voltage sudden changes during the load transfer process of the initial bus and initial main transformer, and ensuring the stable operation of the distribution network.

Description

Technical Field

[0001] The embodiments of the present invention relate to the technology for safe operation of power distribution networks, and particularly to a method, device, equipment and storage medium for preventing sudden voltage changes on feeder busbars. Background Technology

[0002] In power distribution networks, the typical structure near the user side is to connect a busbar of the corresponding voltage level through a main transformer to a low-voltage switch, and then connect loads, reactive power compensation equipment, etc. on the busbar, so as to achieve power distribution by connecting user loads through multiple transformers.

[0003] During the operation of transformers and busbars, power outages may occur due to main transformer failures or overloads in certain sections. Therefore, sectionalizing switches are usually installed between the busbars of adjacent transformers. When the aforementioned faults or overloads occur and power outages are likely to occur, the sectionalizing switch between the faulty busbar and other busbars is closed, and the low-voltage switch between the faulty transformer and the faulty busbar is disconnected, allowing other transformers to supply power. This ensures the normal operation of the distribution network and avoids large-scale power outages for users.

[0004] When a fault or section overload occurs, the sectionalizing switch between the faulty busbar and the adjacent busbar is closed to transfer the load of the faulty or overloaded busbar to the transformer on the adjacent busbar. After the transfer, the main transformer switch directly connecting the faulty transformer and the busbar is disconnected. This process usually causes voltage fluctuations in the busbar and the main transformer. In particular, when disconnecting the main transformer, voltage abrupt changes can easily occur, and the busbar voltage may exceed the acceptable range. Even if it does not exceed the acceptable range, the changes can be significant. For some precision-manufactured, voltage-sensitive equipment, large voltage fluctuations can lead to sudden shutdowns, affecting the quality of batch products, and even endangering personal safety and customer satisfaction. Summary of the Invention

[0005] This invention provides a method, apparatus, device, and storage medium for preventing sudden voltage changes on the busbar and main transformer during load transfer, in order to control potential voltage changes that may occur during load transfer.

[0006] In a first aspect, embodiments of the present invention provide a method for preventing sudden voltage changes on a feeder bus, comprising:

[0007] Obtain the operating parameters of the power equipment, which includes the initial busbar and initial main transformer for which load transfer is required, and the target busbar and target main transformer to which the load is transferred;

[0008] Based on the operating parameters, the tap difference between the initial main transformer and the target main transformer and the voltage change of the target main transformer are confirmed when the initial bus and the initial main transformer perform load transfer.

[0009] The five-prevention interlocking logic for the load transfer operation of the initial bus and the initial main transformer is set based on the gear difference and the voltage change.

[0010] Optionally, the operating parameters include the operating voltage, active power, reactive power, reactive power compensation, and operating speed of the initial main transformer and the target main transformer for the initial bus and the target bus.

[0011] Optionally, the step of confirming the tap difference between the initial main transformer and the target main transformer and the voltage change of the target main transformer when the load is transferred based on the operating parameters includes:

[0012] The difference between the operating gears of the initial main transformer and the target main transformer is calculated as the gear difference;

[0013] The operating parameters of the initial bus are equivalently converted into reactive power changes, which characterize the voltage changes of the target main transformer.

[0014] Optionally, the step of equivalently converting the operating parameters of the initial bus into reactive power changes, characterizing the voltage changes of the target main transformer, includes:

[0015] Calculate the unit reactive power change equivalent to the unit active power based on the operating parameters of the target bus;

[0016] The reactive power changes of the initial bus and the target bus after load transfer are calculated based on the operating parameters of the initial bus and the target bus and the unit reactive power change.

[0017] Optionally, the calculation of the unit reactive power change equivalent to the unit active power based on the operating parameters of the target bus includes:

[0018] Obtain the reactive voltage change of the target main transformer caused by the reactive power compensation of the input unit;

[0019] Obtain the change in voltage at the target main transformer caused by a unit shift change;

[0020] Based on the active power, reactive power compensation power, reactive voltage change, and tap voltage change in the operating parameters of the initial bus, the unit reactive power equivalent unit reactive power change is calculated to characterize the voltage change of the target main transformer.

[0021] Optionally, the step of calculating the reactive power change of the initial bus and the target bus after load transfer based on the operating parameters of the initial bus and the target bus and the unit reactive power change, characterizing the voltage change of the target main transformer, includes:

[0022] The active power, reactive power, reactive power compensation, and tap difference between the initial main transformer and the target main transformer are determined based on the operating parameters of the initial bus.

[0023] The voltage changes of the initial bus and the target bus after load transfer are calculated based on the active power, the reactive power, the reactive power compensation, the tap difference, and the unit reactive power change corresponding to the unit active power.

[0024] Optionally, the five-prevention interlocking logic for setting the load transfer operation of the initial bus and the initial main transformer based on the tap difference and the voltage change includes:

[0025] When the gear difference is greater than the preset gear difference threshold, a five-prevention interlock is set for the transfer and disconnection of the initial bus and the initial main transformer;

[0026] When the voltage change exceeds a preset voltage difference threshold, a five-prevention interlock is set for the transfer and disconnection of the initial bus and the initial main transformer.

[0027] Secondly, embodiments of the present invention also provide a device for preventing sudden voltage changes on a feeder bus, comprising:

[0028] The acquisition module is used to acquire the operating parameters of the power equipment, which includes the initial busbar and the initial main transformer that need to be transferred to the load, and the target busbar and the target main transformer to be transferred to the load.

[0029] The calculation module is used to determine, based on the operating parameters, the tap difference between the initial main transformer and the target main transformer and the voltage change of the target main transformer when the initial bus and the initial main transformer perform load transfer;

[0030] The setting module is used to set the five-prevention interlocking logic of the initial bus and the initial main transformer based on the gear difference and the voltage change.

[0031] Thirdly, embodiments of the present invention also provide a device for preventing sudden voltage changes on the feeder bus, the device comprising:

[0032] One or more processors;

[0033] Storage device for storing one or more programs;

[0034] When the one or more programs are executed by the one or more processors, the one or more processors implement the method for preventing sudden changes in feeder bus voltage as described in the first aspect.

[0035] Fourthly, embodiments of the present invention also provide a storage medium containing computer-executable instructions, which, when executed by a computer processor, are used to perform the method for preventing sudden voltage changes on the feeder bus as described in the first aspect.

[0036] This invention obtains the operating parameters of the initial bus, target bus, initial main transformer, and target main transformer, then calculates the voltage change during the closing and opening operations of sectionalizing switches and low-voltage switches. It then sets a five-prevention interlocking logic based on the tap difference and voltage change. When the logic requirements are met, the closing and opening operations of the sectionalizing switches and low-voltage switches are allowed; when the logic requirements are not met, the closing and opening operations of the sectionalizing switches and low-voltage switches are locked. This avoids voltage surges during load transfer of the initial bus and initial main transformer, ensuring the stable operation of the distribution network. Attached Figure Description

[0037] Figure 1 This is a flowchart of a method for preventing sudden voltage changes on a feeder bus provided in Embodiment 1 of the present invention;

[0038] Figure 2a This is a schematic diagram of the power distribution network structure mentioned in Embodiment 2 of the present invention;

[0039] Figure 2b A flowchart illustrating a method for preventing sudden voltage changes on a feeder bus provided in Embodiment 2 of the present invention.

[0040] Figure 3 This is a structural diagram of a feeder bus voltage anti-sudden change structure provided in Embodiment 3 of the present invention;

[0041] Figure 4 This is a schematic diagram of a device for preventing sudden voltage changes on a feeder bus provided in Embodiment 4 of the present invention. Detailed Implementation

[0042] To enable those skilled in the art to better understand the present invention, the technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort should fall within the scope of protection of the present invention.

[0043] It should be noted that the terms "first," "second," etc., in the specification, claims, and accompanying drawings of this invention are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that such data can be interchanged where appropriate so that the embodiments of the invention described herein can be implemented in orders other than those illustrated or described herein. Furthermore, the terms "comprising" and "having," and any variations thereof, are intended to cover a non-exclusive inclusion; for example, a process, method, system, product, or apparatus that comprises a series of steps or units is not necessarily limited to those steps or units explicitly listed, but may include other steps or units not explicitly listed or inherent to such processes, methods, products, or apparatus.

[0044] Example 1

[0045] Figure 1 This is a flowchart of a method for preventing sudden voltage changes on a bus with feeders, provided in Embodiment 1 of the present invention. This embodiment is applicable to situations where load transfer is required due to a main transformer fault or bus section overload in a distribution network. The method can be executed by a device for preventing sudden voltage changes on a bus with feeders. This device can be implemented by software and / or hardware and can be configured in computer equipment, such as a server, workstation, personal computer, etc. The method specifically includes the following steps:

[0046] Step 110: Obtain the operating parameters of the power equipment.

[0047] Power systems can be broadly categorized into two types: power generation equipment and power supply equipment. Power generation equipment mainly includes power plant boilers, steam turbines, gas turbines, water turbines, generators, transformers, etc., while power supply equipment mainly includes transmission lines of various voltage levels, instrument transformers, contactors, etc. In this embodiment of the invention, the focus is primarily on transformers and power equipment installed and connected to feeder busbars, such as generators, transformers, transmission lines, instrument transformers, contactors, etc.

[0048] In an optional embodiment, the power equipment may include an initial bus and an initial main transformer for which load transfer is required, as well as a target bus and a target main transformer to which the load will be transferred. The operating parameters of the power equipment include information such as the operating voltage, active power, reactive power, reactive power compensation, and transformer tap position of the initial bus, target bus, initial main transformer, and target main transformer. Specifically, the operating parameters of the power equipment can be acquired through data acquisition devices installed on the distribution network, or through other methods that enable the acquisition of operating parameters.

[0049] Step 120: Based on the operating parameters, confirm the tap difference between the initial main transformer and the target main transformer and the voltage change of the target main transformer when the load is transferred between the initial bus and the initial main transformer.

[0050] In practice, during load transfer, closing the sectionalizing switch between the initial bus and the target bus, and opening the low-voltage switch between the initial main transformer and the initial bus, both cause voltage fluctuations. Large voltage fluctuations can lead to sudden voltage changes, which can seriously endanger the safe operation of the distribution network. A sudden voltage change refers to a voltage fluctuation exceeding a preset threshold range, which can easily cause sudden shutdowns or damage to electrical equipment.

[0051] The operating voltage of the busbar mainly depends on the reactive and active power provided by the transformer, the active and reactive power of the load on the busbar, and reactive power compensation. The reactive and active power of the transformer primarily depend on its operating tap position. Therefore, the voltage change before and after the closing and opening of the sectionalizing switch between the initial and target busbars can be calculated using the operating parameters of the initial busbar, target busbar, initial main transformer, and target main transformer. The voltage change caused by the closing and opening of the low-voltage switch between the initial main transformer and the initial busbar can also be calculated. In this step, the voltage change caused by the closing and opening of the sectionalizing switch and low-voltage switch is determined based on the operating parameters.

[0052] Optionally, in calculating the voltage change of the target main transformer after load transfer, all changes can be converted into a unified unit for calculation. For example, the impact of active power on voltage can be converted into reactive power, and then the changed reactive power and reactive power compensation can be combined to obtain the changed reactive power, which can then be used to characterize the voltage change.

[0053] Step 130: Set the five-prevention interlocking logic for the load transfer operation of the initial bus and the initial main transformer based on the tap difference and voltage change.

[0054] In the preceding steps, the voltage change caused by the closing and opening operations of the sectionalizing switch and the low-voltage switch was determined based on the operating parameters. In this step, the magnitude of the voltage change can be used to determine whether a voltage surge will occur during the closing and opening operations of the sectionalizing switch and the low-voltage switch. Furthermore, a five-prevention interlocking logic is set based on the voltage change and a preset threshold range. When the gear difference is greater than the preset threshold or when the voltage change is outside the preset threshold range, the five-prevention interlocking logic is executed, locking the sectionalizing switch and the low-voltage switch. The sectionalizing switch and the low-voltage switch are only unlocked when the voltage change is within the threshold range.

[0055] In this embodiment of the invention, by acquiring the operating parameters of the initial bus, target bus, initial main transformer, and target main transformer, and then calculating the voltage change during the closing and opening operations of the sectionalizing switch and the low-voltage switch, a five-prevention interlocking logic based on the tap difference and voltage change is set. When the logic requirements are met, the closing and opening operations of the sectionalizing switch and the low-voltage switch are allowed to be executed; when the logic requirements are not met, the closing and opening operations of the sectionalizing switch and the low-voltage switch are locked. This avoids voltage surges during the load transfer of the initial bus and the initial main transformer, ensuring the stable operation of the distribution network.

[0056] Example 2

[0057] Figure 2a This is a schematic diagram of the power distribution network structure mentioned in Embodiment 2 of the present invention. Figure 2b This is a flowchart illustrating a method for preventing sudden voltage changes on a feeder bus, provided in Embodiment 2 of the present invention. This embodiment is a refinement of Embodiment 1, detailing the specific operations for calculating voltage changes based on operating parameters and setting the five-prevention logic. The method specifically includes the following steps:

[0058] Step 201: Obtain the operating parameters of the power equipment.

[0059] like Figure 2a The simplified diagram of the distribution network structure shown includes power equipment such as an initial busbar 21 and an initial main transformer 22 for which load transfer is required, as well as a target busbar 23 and a target main transformer 24 to which the load is transferred. A low-voltage switch 25 is installed between the initial busbar 21 and the initial main transformer 22, and between the target busbar 23 and the target main transformer 24. A sectionalizing switch 26 is installed between the initial busbar 21 and the target busbar 23. Operating parameters may include at least the operating voltage, active power, reactive power, and operating speed of the initial and target main transformers.

[0060] Step 202: Calculate the difference in operating gear between the initial main transformer and the target main transformer as the gear difference.

[0061] In this embodiment of the invention, when the difference between the operating positions of the initial main transformer and the target main transformer is too large, closing the sectionalizing switch between the initial bus and the target bus will easily cause a voltage surge. Therefore, in this embodiment of the invention, the difference between the operating positions of the initial main transformer and the target main transformer is also calculated.

[0062] In this embodiment of the invention, the operating parameters of the initial bus are equivalently converted into reactive power change, representing the voltage change of the target main transformer. That is, in this embodiment, the voltage after the operation of the sectionalizing switch and the low-voltage switch is calculated based on the current operating parameters of the initial bus and the target bus, and then the voltage change is obtained based on the operating parameters and the calculated voltage after the change.

[0063] In an optional embodiment, the calculation of the voltage change may include the following steps:

[0064] Step 203: Calculate the unit reactive power change equivalent to the unit active power based on the operating parameters of the target bus.

[0065] The step in this process is to equate the effect of active power on voltage in the initial bus and the target bus to a unit reactive power change. In other words, it equates a unit of active power to reactive power with the same effect on voltage.

[0066] In a specific embodiment, suppose a capacitor bank is connected, providing reactive power compensation of 6 MVAR, and the active power of the bus is 20 MW. After the capacitor bank is connected, the voltage rises by 0.2 kV. The transformer adjusts its operating position by one step, causing the voltage to rise by 0.1 kV. Therefore, a voltage change of 0.1 kV corresponds to 3 MVAR of reactive power. Thus, the reactive power per unit of active power can be calculated as: a = 3 MVAR / 20 MW.

[0067] Step 204: Calculate the reactive power change of the initial bus and the target bus after load transfer based on the operating parameters and unit reactive power change of the initial bus and the target bus, which characterizes the voltage change of the target main transformer.

[0068] This step calculates the increase in reactive power of the final connected line relative to the original target bus's operating conditions, based on the unit reactive power change calculated in step 203 and the changes after the initial bus and target bus are connected. In other words, it calculates the actual reactive power change of the target transformer after merging the initial bus into the target bus. This can be calculated and determined using the following formula:

[0069] Q 变 =Q1-Q2+K1*P1*(A2-A1) (1)

[0070] Among them, Q 变 The variable reactive power is Q1, the active power of the initial bus is Q2, the reactive power compensation of the initial bus is K1, the unit reactive power change obtained in step 203 above is P1, the active power of the initial bus load is A1, the operating position of the initial main transformer is A2, and the operating position of the target main transformer is A2.

[0071] Step 203 may include:

[0072] Step 2031: Obtain the reactive voltage change of the target main transformer caused by the reactive power compensation of the input unit.

[0073] In other words, in this step, the voltage change of the target main transformer is caused by the input of reactive power compensation. Then, based on the voltage change and the input reactive power compensation, the reactive voltage change of the target main transformer that can be caused by the unit reactive power compensation is calculated.

[0074] Step 2032: Obtain the change in voltage at the target main transformer caused by the change in the unit gear position.

[0075] In other words, in this step, the working unit of the target transformer is adjusted, and the voltage change caused by a single change in the working position is recorded.

[0076] Step 2033: Calculate the unit reactive power change equivalent to the unit active power based on the active power, reactive power compensation power, reactive voltage change and tap voltage change in the initial bus operating parameters.

[0077] In this step, the voltage change of the target main transformer is characterized by a unit reactive power change equivalent to a unit active power change. In other words, active power is converted into reactive power to facilitate a unified calculation of the voltage change of the target main transformer.

[0078] Step 204 may include:

[0079] Step 2041: Determine the transferred active power, reactive power, reactive power compensation, and tap difference between the initial main transformer and the target main transformer based on the operating parameters of the initial bus.

[0080] In practical implementation, it is necessary to extract the active power, reactive power, reactive power compensation, and operating range of the initial and target main transformers from the operating parameters of the initial and target main transformers, and calculate the difference between the initial and target main transformers as the range difference.

[0081] Step 2042: Calculate the voltage change of the initial bus and the target bus after load transfer based on active power, reactive power, reactive power compensation, tap difference, and unit reactive power change corresponding to unit active power.

[0082] Optionally, in this step, the voltage changes of the target main transformer and the target bus can be calculated based on the aforementioned Formula 1.

[0083] Step 205: When the gear difference is greater than the preset gear difference threshold, set five-prevention interlocking for the transfer and disconnection of the initial bus and the initial main transformer.

[0084] Step 206: When the voltage change exceeds the preset voltage difference threshold, set a five-prevention interlock for the transfer and disconnection of the initial bus and the initial main transformer.

[0085] In this embodiment of the invention, steps 205 and 206 are based on the previously calculated tap difference and voltage change amount to set the five-prevention logic. When the tap difference or voltage change amount is large, the five-prevention logic is locked to prevent the grid connection of the initial bus and the target bus and the removal of the initial transformer from being performed when voltage changes may occur, thus ensuring the safe and stable operation of the distribution network.

[0086] Example 3

[0087] Figure 3 This is a structural diagram illustrating a feeder bus voltage anti-sudden change structure according to Embodiment 3 of the present invention. The device includes: an acquisition module 31, a calculation module 32, and a setting module 33. Wherein:

[0088] The acquisition module 31 is used to acquire the operating parameters of the power equipment, which includes the initial bus and the initial main transformer that need to be transferred to the load, and the target bus and the target main transformer to be transferred to the load.

[0089] Calculation module 32 is used to determine the tap difference between the initial main transformer and the target main transformer and the voltage change of the target main transformer when the initial bus and the initial main transformer are transferring load based on the operating parameters;

[0090] The setting module 33 is used to set the five-prevention blocking logic for the load transfer operation of the initial bus and the initial main transformer based on the tap difference and the voltage change.

[0091] The operating parameters include the operating voltage, active power, reactive power, reactive power compensation, and operating positions of the initial and target main transformers.

[0092] The calculation module 32 may include:

[0093] The gear difference calculation submodule is used to calculate the gear difference between the initial main transformer and the target main transformer as the gear difference.

[0094] The conversion submodule is used to convert the operating parameters of the initial bus into equivalent reactive power changes, which characterize the voltage changes of the target main transformer.

[0095] The conversion submodule includes:

[0096] The unit reactive power calculation unit is used to calculate the unit reactive power change equivalent to the unit active power based on the operating parameters of the target bus.

[0097] The reactive power change unit is used to calculate the reactive power change of the initial bus and the target bus after load transfer based on the operating parameters of the initial bus and the target bus and the unit reactive power change, and to characterize the voltage change of the target main transformer.

[0098] The unit of reactive power calculation includes:

[0099] The compensation subunit is used to obtain the reactive voltage change of the target main transformer caused by the reactive power compensation of the input unit;

[0100] The gear shifting subunit is used to obtain the gear voltage change caused by a unit gear shift of the target main transformer.

[0101] The unit calculation subunit is used to calculate the unit reactive power equivalent to the unit reactive power change based on the active power, reactive power compensation power, reactive voltage change and tap voltage change in the operating parameters of the initial bus.

[0102] The reactive power conversion unit may include:

[0103] The gear difference sub-unit is used to determine the transferred active power, reactive power, reactive power compensation, and gear difference between the initial main transformer and the target main transformer based on the operating parameters of the initial bus.

[0104] The change calculation subunit is used to calculate the voltage change of the initial bus and the target bus after load transfer based on active power, reactive power, reactive compensation, tap difference, and unit reactive change corresponding to unit active power.

[0105] Setting module 33 includes:

[0106] The gear position unit is used to set five-prevention interlocks for the transfer and disconnection of the initial bus and the initial main transformer when the gear position difference is greater than the preset gear position difference threshold.

[0107] The voltage unit is used to set five-prevention interlocks for the transfer and disconnection of the initial bus and the initial main transformer when the voltage change exceeds the preset voltage difference threshold.

[0108] The feeder bus voltage anti-sudden change device provided in this embodiment of the invention can execute the feeder bus voltage anti-sudden change method provided in any embodiment of the invention, and has the corresponding functional modules and beneficial effects of the method.

[0109] Example 4

[0110] Figure 4 This is a schematic diagram of a device for preventing sudden voltage changes on a feeder bus provided in Embodiment 4 of the present invention. Figure 4 As shown, the electronic device includes a processor 40, a memory 41, a communication module 42, an input device 43, and an output device 44; the number of processors 40 in the electronic device can be one or more. Figure 4Taking a processor 40 as an example; the processor 40, memory 41, communication module 42, input device 43, and output device 44 in the electronic device can be connected via a bus or other means. Figure 4 Taking the example of a connection between China and Israel via a bus.

[0111] The memory 41, as a computer-readable storage medium, can be used to store software programs, computer-executable programs, and modules, such as modules corresponding to a method for preventing sudden voltage changes with a feeder bus in this embodiment (e.g., acquisition module 31, calculation module 32, and setting module 33 in a method for preventing sudden voltage changes with a feeder bus). The processor 40 executes various functional applications and data processing of the electronic device by running the software programs, instructions, and modules stored in the memory 41, thereby implementing the aforementioned method for preventing sudden voltage changes with a feeder bus.

[0112] The memory 41 may primarily include a program storage area and a data storage area. The program storage area may store the operating system and at least one application program required for a given function; the data storage area may store data created based on the use of the electronic device. Furthermore, the memory 41 may include high-speed random access memory and non-volatile memory, such as at least one disk storage device, flash memory device, or other non-volatile solid-state storage device. In some instances, the memory 41 may further include memory remotely located relative to the processor 40, which can be connected to the electronic device via a network. Examples of such networks include, but are not limited to, the Internet, intranets, local area networks, mobile communication networks, and combinations thereof.

[0113] The communication module 42 is used to establish a connection with the display screen and to realize data interaction with the display screen. The input device 43 can be used to receive input digital or character information, and to generate key signal inputs related to user settings and function control of the electronic device.

[0114] This embodiment provides a device for preventing sudden voltage changes on the feeder bus, which can perform the method for preventing sudden voltage changes on the feeder bus provided in any embodiment of the present invention, with specific corresponding functions and beneficial effects.

[0115] Example 5

[0116] Embodiment 5 of the present invention also provides a storage medium containing computer-executable instructions, which, when executed by a computer processor, are used to perform a method for preventing sudden voltage changes on a feeder bus, the method comprising:

[0117] Obtain the operating parameters of the power equipment, which includes the initial busbar and initial main transformer that need to be transferred to the load, and the target busbar and target main transformer to be transferred to the load.

[0118] Based on the operating parameters, confirm the tap difference between the initial main transformer and the target main transformer and the voltage change of the target main transformer when the load is transferred between the initial bus and the initial main transformer;

[0119] The five-prevention interlocking logic for load transfer operations of the initial bus and initial main transformer is set based on the tap difference and voltage change.

[0120] Of course, the computer-executable instructions provided in the embodiments of the present invention are not limited to the method operations described above, but can also perform related operations in the method for preventing sudden voltage changes with feeder bus provided in any embodiment of the present invention.

[0121] Based on the above description of the implementation methods, those skilled in the art can clearly understand that the present invention can be implemented using software and necessary general-purpose hardware, and of course, it can also be implemented using hardware, but in many cases the former is a better implementation method. Based on this understanding, the technical solution of the present invention, or the part that contributes to the prior art, can be embodied in the form of a software product. This computer software product can be stored in a computer-readable storage medium, such as a computer floppy disk, read-only memory (ROM), random access memory (RAM), flash memory, hard disk, or optical disk, etc., including several instructions to cause a computer electronic device (which may be a personal computer, server, or network electronic device, etc.) to execute the methods described in the various embodiments of the present invention.

[0122] It is worth noting that in the above embodiment of voltage surge prevention with feeder bus, the various units and modules included are only divided according to functional logic, but are not limited to the above division, as long as the corresponding functions can be achieved; in addition, the specific names of each functional unit are only for easy differentiation and are not used to limit the scope of protection of the present invention.

[0123] Note that the above description is merely a preferred embodiment of the present invention and the technical principles employed. Those skilled in the art will understand that the present invention is not limited to the specific embodiments described herein, and various obvious changes, readjustments, and substitutions can be made without departing from the scope of protection of the present invention. Therefore, although the present invention has been described in detail through the above embodiments, the present invention is not limited to the above embodiments, and may include many other equivalent embodiments without departing from the concept of the present invention, the scope of which is determined by the scope of the appended claims.

Claims

1. A method for preventing sudden voltage changes on a feeder bus, characterized in that, include: Obtain the operating parameters of the power equipment, which includes the initial busbar and initial main transformer for which load transfer is required, and the target busbar and target main transformer to which the load is transferred; Based on the operating parameters, the tap difference between the initial main transformer and the target main transformer and the voltage change of the target main transformer are confirmed when the initial bus and the initial main transformer perform load transfer. The step of confirming the tap difference between the initial main transformer and the target main transformer and the voltage change of the target main transformer during load transfer based on the operating parameters includes: The difference between the operating gears of the initial main transformer and the target main transformer is calculated as the gear difference; The operating parameters of the initial bus are equivalently converted into reactive power changes, which characterize the voltage changes of the target main transformer. The five-prevention interlocking logic for the load transfer operation of the initial bus and the initial main transformer is set based on the gear difference and the voltage change.

2. The method for preventing sudden voltage changes on a feeder bus as described in claim 1, characterized in that, The operating parameters include the operating voltage, active power, reactive power, reactive power compensation, and operating speed of the initial main transformer and the target main transformer for the initial bus and the target bus.

3. The method for preventing sudden voltage changes on a feeder bus as described in claim 1, characterized in that, The equivalent conversion of the operating parameters of the initial bus into reactive power changes, characterizing the voltage changes of the target main transformer, includes: Calculate the unit reactive power change equivalent to the unit active power based on the operating parameters of the target bus; The reactive power change of the initial bus and the target bus after load transfer is calculated based on the operating parameters and the unit reactive power change of the initial bus and the target bus, which characterizes the voltage change of the target main transformer. The reactive power change is calculated using the following formula: ,in, For changing reactive power, This represents the reactive power of the initial bus. Reactive power compensation for the initial busbar input, To obtain the unit reactive power change, This represents the active power of the initial bus load. This is the initial operating position of the main transformer. The working level of the target main change.

4. The method for preventing sudden voltage changes on a feeder bus as described in claim 3, characterized in that, The calculation of the unit reactive power change equivalent to unit active power based on the operating parameters of the target bus includes: Obtain the reactive voltage change of the target main transformer caused by the reactive power compensation of the input unit; Obtain the change in voltage at the target main transformer caused by a unit shift change; Based on the active power, reactive power compensation power, reactive voltage change, and tap voltage change in the operating parameters of the initial bus, calculate the unit reactive power equivalent to the unit reactive power change.

5. The method for preventing sudden voltage changes on a feeder bus as described in claim 3, characterized in that, The calculation of the reactive power change of the initial bus and the target bus after load transfer, based on the operating parameters of the initial bus and the target bus and the unit reactive power change, characterizes the voltage change of the target main transformer, including: The active power, reactive power, reactive power compensation, and tap difference between the initial main transformer and the target main transformer are determined based on the operating parameters of the initial bus. The voltage changes of the initial bus and the target bus after load transfer are calculated based on the active power, the reactive power, the reactive power compensation, the tap difference, and the unit reactive power change corresponding to the unit active power.

6. The method for preventing sudden voltage changes on a feeder bus as described in claim 1, characterized in that, The five-prevention interlocking logic for setting the load transfer operation of the initial bus and the initial main transformer based on the tap difference and the voltage change includes: When the gear difference is greater than the preset gear difference threshold, a five-prevention interlock is set for the transfer and disconnection of the initial bus and the initial main transformer; When the voltage change exceeds a preset voltage difference threshold, a five-prevention interlock is set for the transfer and disconnection of the initial bus and the initial main transformer.

7. A device for preventing sudden voltage changes on a feeder bus, used to perform the method for preventing sudden voltage changes on a feeder bus as described in any one of claims 1-6, characterized in that, include: The acquisition module is used to acquire the operating parameters of the power equipment, which includes the initial busbar and the initial main transformer that need to be transferred to the load, and the target busbar and the target main transformer to be transferred to the load. The calculation module is used to determine, based on the operating parameters, the tap difference between the initial main transformer and the target main transformer and the voltage change of the target main transformer when the initial bus and the initial main transformer perform load transfer; The setting module is used to set the five-prevention interlocking logic for the load transfer operation of the initial bus and the initial main transformer based on the tap difference and the voltage change.

8. A device for preventing sudden voltage changes on the feeder bus, characterized in that, The device includes: One or more processors; Storage device for storing one or more programs; When the one or more programs are executed by the one or more processors, the one or more processors implement the method for preventing sudden changes in feeder bus voltage as described in any one of claims 1-6.

9. A storage medium containing computer-executable instructions, characterized in that, The computer-executable instructions, when executed by a computer processor, are used to perform the method for preventing sudden voltage changes on a feeder bus as described in any one of claims 1-6.

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