A Substation Reactive Power Control Method, Device, Equipment and Readable Storage Medium

Abstract

The present application discloses a reactive power control method, device, electronic device and readable storage medium for a substation, including: obtaining real-time operation data of the generator sets and reactive power compensation devices respectively carried by buses of different voltage levels in the target station; obtaining real-time electrical quantity information of the booster station in the target station; calculating the sum of the reactive power of all generator sets and reactive power compensation devices under buses of different voltage levels in the current state according to the real-time operation data and real-time electrical quantity information; calculating the difference between the actual assessment parameter and the target parameter of the assessment point in the target station, and determining the components to be adjusted corresponding to buses of different voltage levels respectively through a preset allocation strategy for the total amount to be adjusted represented by the difference; adjusting the corresponding voltage level bus according to the components to be adjusted corresponding to the corresponding voltage level bus. The application of this method can avoid the situation of unreasonable allocation in the adjustment process, and improve the rationality of allocation and adjustment.

Description

Technical Field

[0001] The present application relates to the field of power generation control, and in particular to a method, device, electronic device and computer-readable storage medium for reactive power control of a substation. Background Art

[0002] In the renewable energy station, the AVC system is an automatic voltage control system of the power plant, which can collect and control the output of reactive power of the renewable energy station in real time to adjust the voltage stability.

[0003] At present, with the increasing installed capacity of new energy units, the scale of the corresponding booster substations has also increased, and the structure has become relatively more complex. The control requirements and difficulty of the substation AVC system have also increased accordingly.

[0004] Usually, the low-voltage side bus of the booster substation of a new energy station has only one voltage level, but there are also cases where two buses with different voltage levels exist at the same time (for example, there are two voltage levels of 10KV and 35KV at the same time). In this case, how to allocate reactive power more reasonably is a problem that needs to be solved urgently by technical personnel in this field. Summary of the invention

[0005] The purpose of the present application is to provide a substation reactive power control method, device, electronic device and computer-readable storage medium.

[0006] To achieve the above-mentioned purpose, the present application provides a reactive power control method for a substation in the first aspect, the method comprising: obtaining real-time operating data of the generator sets and reactive power compensation devices respectively carried by buses of different voltage levels in the target station; obtaining real-time electrical quantity information of the booster station in the target station; wherein the real-time electrical quantity information comprises: real-time active power, reactive power, voltage and frequency; according to the real-time operating data and the real-time electrical quantity information, calculating the sum of reactive power of all generator sets and reactive power compensation devices under buses of different voltage levels in the current state; wherein the sum of reactive power is the sum of real-time reactive power, increaseable reactive power and decreaseable reactive power; calculating the difference between the actual assessment parameter and the target parameter of the assessment point in the target station, and determining the components to be adjusted corresponding to buses of different voltage levels through a preset allocation strategy for the total amount to be adjusted represented by the difference; wherein the actual assessment parameter is the assessment parameter corresponding to the sum of reactive power; adjusting the corresponding voltage level bus according to the components to be adjusted corresponding to the corresponding voltage level bus.

[0007] In some other embodiments of the first aspect of the present application, calculating the difference between the actual assessment parameter and the target parameter of the assessment point in the target station includes:

[0008] Calculate the voltage difference between the actual voltage at the assessment point in the target station and the target voltage value.

[0009] In some other embodiments of the first aspect of the present application, calculating the difference between the actual assessment parameter and the target parameter of the assessment point in the target station includes:

[0010] Calculate the reactive power difference between the actual reactive power and the target reactive power of the assessment point in the target station.

[0011] In some other embodiments of the first aspect of the present application, the total amount to be adjusted represented by the difference is used to determine the components to be adjusted corresponding to buses of different voltage levels respectively through a preset allocation strategy, including:

[0012] The total amount to be adjusted, which is represented by the difference, is used to determine the components to be adjusted corresponding to buses of different voltage levels according to the margin strategy.

[0013] In some other embodiments of the first aspect of the present application, the total amount to be adjusted represented by the difference is used to determine the components to be adjusted corresponding to buses of different voltage levels respectively through a preset allocation strategy, including:

[0014] The total amount to be adjusted, which is represented by the difference, is determined according to the margin equalization strategy, and the components to be adjusted corresponding to the buses of different voltage levels are determined.

[0015] In some other embodiments of the first aspect of the present application, the method further comprises:

[0016] In response to the reactive capacity carried by any section of the bus reaching a preset first limit value, only the reactive power / voltage adjustment of the corresponding section of the bus is blocked.

[0017] In some other embodiments of the first aspect of the present application, the method further comprises:

[0018] In response to the reactive capacity carried by any section of the bus reaching a preset second limit value, the voltage of all voltage level buses and grid connection points in the target station are locked and controlled.

[0019] To achieve the above-mentioned purpose, the present application provides a substation reactive power control device in the second aspect, which includes: a real-time operation data acquisition unit, which is configured to acquire the real-time operation data of the generator sets and reactive power compensation devices respectively carried by the buses of different voltage levels in the target station; a real-time electrical quantity information acquisition unit, which is configured to acquire the real-time electrical quantity information of the booster station in the target station; wherein the real-time electrical quantity information includes: real-time active power, reactive power, voltage, and frequency; a reactive power sum calculation unit, which is configured to calculate the current state of the buses of different voltage levels according to the real-time operation data and the real-time electrical quantity information. The sum of the reactive power of all generating sets and reactive power compensation devices; wherein, the sum of reactive power is the sum of real-time reactive power, increaseable reactive power and decreaseable reactive power; the difference calculation and to-be-adjusted component determination unit is configured to calculate the difference between the actual assessment parameter and the target parameter of the assessment point in the target station, and determine the to-be-adjusted components corresponding to the buses of different voltage levels through a preset allocation strategy for the total amount to be adjusted which is represented by the difference; wherein, the actual assessment parameter is the assessment parameter corresponding to the sum of reactive power; the adjustment unit is configured to adjust the corresponding voltage level bus according to the to-be-adjusted component corresponding to the corresponding voltage level bus.

[0020] In some other embodiments of the second aspect of the present application, the difference calculation and to-be-adjusted component determination unit includes a difference calculation subunit configured to calculate the difference between the actual assessment parameter and the target parameter of the assessment point in the target station, and the difference calculation subunit is further configured to:

[0021] Calculate the voltage difference between the actual voltage at the assessment point in the target station and the target voltage value.

[0022] In some other embodiments of the second aspect of the present application, the difference calculation and to-be-adjusted component determination unit includes a difference calculation subunit configured to calculate the difference between the actual assessment parameter and the target parameter of the assessment point in the target station, and the difference calculation subunit is further configured to:

[0023] Calculate the reactive power difference between the actual reactive power and the target reactive power of the assessment point in the target station.

[0024] In some other embodiments of the second aspect of the present application, the difference calculation and to-be-adjusted component determination unit includes a to-be-adjusted component determination subunit configured to determine the to-be-adjusted components corresponding to buses of different voltage levels respectively using a preset allocation strategy for the total amount to be adjusted represented by the difference, and the to-be-adjusted component determination subunit is further configured to:

[0025] The total amount to be adjusted, which is represented by the difference, is used to determine the components to be adjusted corresponding to buses of different voltage levels according to the margin strategy.

[0026] In some other embodiments of the second aspect of the present application, the difference calculation and component-to-be-adjusted determination unit includes a component-to-be-adjusted determination subunit configured to determine the components to be adjusted corresponding to busbars of different voltage levels respectively from the total amount to be adjusted served by the difference through a preset allocation strategy. The component-to-be-adjusted determination subunit is further configured to:

[0027] Determine the components to be adjusted corresponding to busbars of different voltage levels respectively from the total amount to be adjusted served by the difference according to the equal margin strategy.

[0028] In some other embodiments of the second aspect of the present application, the substation reactive power control device further includes:

[0029] A first blocking control unit configured to block the reactive power / voltage adjustment of the corresponding section of busbar only in response to the reactive power capacity carried by any section of busbar reaching a preset first limit value.

[0030] In some other embodiments of the second aspect of the present application, the substation reactive power control device further includes:

[0031] A second blocking control unit configured to perform blocking control on the busbars of all voltage levels and the grid connection point voltage in the target substation in response to the reactive power capacity carried by any section of busbar reaching a preset second limit value.

[0032] To achieve the above object, the present application provides an electronic device in the third aspect. The electronic device includes:

[0033] A memory for storing a computer program;

[0034] A processor configured to implement the steps of the substation reactive power control method described in any one of the embodiments in the first aspect above when executing the computer program stored in the memory.

[0035] To achieve the above object, the present application provides a computer-readable storage medium in the fourth aspect. A computer program is stored on the computer-readable storage medium, and when the computer program is executed by a processor, the steps of the substation reactive power control described in any one of the embodiments in the first aspect above are implemented.

[0036] For the substation reactive power control method provided by the present application, for a substation with multiple low-voltage busbars and inconsistent low-voltage voltage levels, the controlled reactive power devices connected thereto can be divided according to their different voltage levels, and by referring to the reactive power of the grid connection point of the whole station, the reactive power is calculated and distributed according to the voltage level, and when distributing, the situation that the reactive power source capacities carried by the two busbars of different voltage levels are inconsistent is fully considered, and the distribution is performed with a suitable allocation strategy to avoid unreasonable distribution during the adjustment process and improve the rationality of distribution and adjustment.

[0037] This application also provides a substation reactive power control device, an electronic device, and a computer-readable storage medium, which have the above beneficial effects and will not be elaborated here. Description of the Drawings

[0038] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art. Obviously, the drawings in the following description are only the embodiments of this application. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on the provided drawings.

[0039] Figure 1 It is a flowchart of a substation reactive power control method provided by an embodiment of this application;

[0040] Figure 2 It is a schematic diagram of a blocking control strategy provided by an embodiment of this application;

[0041] Figure 3 It is a schematic diagram of a substation reactive power control system provided by an embodiment of this application;

[0042] Figure 4 It is a structural block diagram of a substation reactive power control device provided by an embodiment of this application. Detailed Embodiments

[0043] To make the objectives, technical solutions, and advantages of the embodiments of this application clearer, the following will clearly and completely describe the technical solutions in the embodiments of this application with reference to the drawings in the embodiments of this application. Obviously, the described embodiments are some, but not all, of the embodiments of this application. Based on the embodiments in this application, all other embodiments obtained by those of ordinary skill in the art without creative efforts belong to the scope of protection of this application.

[0044] Please refer to Figure 1 , Figure 1 It is a flowchart of a substation reactive power control provided by an embodiment of this application, which includes the following steps:

[0045] Step 101: Obtain the real-time operation data of the generator sets and reactive power compensation devices respectively carried by the busbars of different voltage levels in the target substation;

[0046] This step aims to obtain the real-time operation data of the generating units and reactive power compensation devices respectively connected to the busbars of different voltage levels in the target substation by the execution entity (such as a local server or a cloud server for data processing and analysis) suitable for implementing the substation reactive power control method provided in this application. Taking two specific voltage levels of 10 kV and 35 kV as an example, this step aims to obtain the real-time working data and operation status information of the generating units and reactive power compensation devices respectively connected to these two busbars, so as to fully reflect their real-time working status.

[0047] Among them, the target substation can include a substation of conventional energy, or specifically a new energy substation. When it is specifically a new energy substation, its generating units are specifically wind power / photovoltaic generating units.

[0048] Among them, the reactive power compensation device is a device used to improve the power factor in the power system. The power factor is an index to measure the phase relationship between current and voltage, which reflects the effective utilization degree of electric energy. Improving the power factor is of great significance for improving the stability of the power grid, reducing energy loss and reducing electricity costs.

[0049] Step 102: Obtain the real-time electrical quantity information of the booster station in the target substation;

[0050] Based on step 101, this step aims to obtain the real-time electrical quantity information including real-time active power, reactive power, voltage, frequency, etc. of the booster station in the target substation by the above-mentioned execution entity.

[0051] Step 103: Calculate the sum of reactive power of all generating units and reactive power compensation devices under different voltage level busbars in the current state according to the real-time operation data and real-time electrical quantity information;

[0052] Based on step 101 and step 102, this step aims to calculate the sum of reactive power of all generating units and reactive power compensation devices under different voltage level busbars in the current state by the above-mentioned execution entity according to the real-time operation data and real-time electrical quantity information. Among them, the sum of reactive power is the sum of real-time reactive power, incremental reactive power and decremental reactive power.

[0053] Still taking the case of the two voltage levels of 10 kV and 35 kV mentioned above as an example, this step aims to summarize the real-time operation data of step 101 and the real-time electrical quantity information of step 102 according to the busbars of different voltage levels, that is, the real-time reactive power, incremental reactive power and decremental reactive power of the generating units and reactive power compensation devices connected to the 10 kV busbar, and the real-time reactive power, incremental reactive power and decremental reactive power of the generating units and reactive power compensation devices connected to the 35 kV section busbar.

[0054] Step 104: Calculate the difference between the actual assessment parameter and the target parameter of the assessment point in the target station, and determine the components to be adjusted corresponding to buses of different voltage levels respectively using the total amount to be adjusted represented by the difference through a preset allocation strategy;

[0055] On the basis of step 103, this step aims at having the above-mentioned execution subject first calculate the difference between the actual assessment parameter of the assessment point in the target station (the actual assessment parameter is the assessment parameter corresponding to the sum of the reactive power) and the target parameter, and then use the preset allocation strategy to determine the components to be adjusted corresponding to the buses of different voltage levels through the total amount to be adjusted represented by the difference, so as to make reasonable allocation based on the fact that buses of different voltage levels often correspond to different reactive capacity sources.

[0056] Specifically, the actual assessment parameter can be the actual voltage value corresponding to the sum of the reactive power, and the corresponding target parameter is the target voltage value, then the difference at this time is the voltage difference; the actual assessment parameter can also be the actual reactive power corresponding to the sum of the reactive power, and the corresponding target parameter is the target reactive power, then the difference at this time is the reactive power difference.

[0057] Specifically, the preset allocation strategy may include: allocation according to the margin strategy or the equal margin strategy, that is, allocating the total amount to be adjusted around the remaining reactive capacity of each voltage level bus to avoid the situation where the remaining reactive capacity of a certain voltage level bus exceeds the average distribution.

[0058] Of course, in addition to the two allocation strategies mentioned above, there are more allocation strategies under the condition of fully combining the different reactive capacity sources of buses of different voltage levels, such as determining the allocation ratio according to the remaining amount, determining the allocation ratio according to stability, determining the allocation ratio according to safety, etc. Appropriate strategies can be selected in actual application scenarios.

[0059] Step 105: Adjust the corresponding voltage level bus according to the component to be adjusted corresponding to the corresponding voltage level bus.

[0060] On the basis of step 104, this step aims to adjust the corresponding voltage level bus according to the to-be-adjusted component corresponding to the corresponding voltage level bus by the above-mentioned execution subject, so that the units and reactive power compensation devices under each voltage level bus respond according to the instructions after receiving the allocated adjustment instructions, thereby making the voltage or reactive power at the assessment point close to the target value, thereby achieving the purpose of regulating voltage or reactive power.

[0061] The substation reactive power control method provided by this application is applicable to substations with multiple low-voltage buses and inconsistent low-voltage voltage levels. According to the different voltage levels, the connected controlled reactive power devices can be divided. Referring to the reactive power at the grid connection point of the whole station, reactive power is calculated and distributed according to the voltage level, and when distributing, the situation that the reactive power source capacities carried by the two busbars of different voltage levels are inconsistent is fully considered, and a suitable distribution strategy is used for distribution to avoid unreasonable distribution during the adjustment process and improve the rationality of distribution and adjustment.

[0062] Based on the above embodiments, in the specific distribution process of this application, the operating conditions of busbars of different voltage levels need to be considered. When the reactive power capacity carried by a certain level of busbar reaches the full load, the following two locking control strategies can be adopted as Figure 2 shown:

[0063] First: When the reactive power capacity carried by a certain section of busbar reaches the limit value, the reactive power / voltage adjustment of this section of busbar needs to be locked. When the reactive power capacity carried by the busbar of the other voltage level does not reach the limit value, the adjustment of the busbar of this voltage level continues until the limit value is reached and then it is locked;

[0064] Second: When the reactive power capacity carried by a certain section of busbar reaches the limit value, the adjustment of all voltage levels of busbars in the whole station and the adjustment of the grid connection point voltage need to be locked to ensure the adjustment accuracy of the reactive power / voltage of the power station and the operation safety of the power station.

[0065] In an optional embodiment, for a substation with busbars of different voltage levels on the low-voltage side, in this embodiment, the busbars of two voltage levels, 10 kV and 35 kV, are taken as examples for illustration:

[0066] As Figure 3 described, the AVC system of the power station is configured with two servers, namely the main machine 10 and the slave machine 20. Among them, the number of slave machines 20 can increase one by one following the increase in the number of busbars of the voltage level. In this embodiment, the busbars of two voltage levels, 10 kV and 35 kV, correspond to the main machine 10 and the slave machine 20 respectively. Among them, the main machine 10 collects relevant data of the whole station and one section of the 10 kV or 35 kV busbar, and the slave machine 20 collects relevant data of the other section of the 10 kV or 35 kV busbar. The main machine 10 communicates with other relevant business systems in the station, and performs instruction operation and distribution; the slave machine 20 communicates with the main machine 10, receives the instruction of the main machine 10 and performs calculation and distribution.

[0067] The host 10 acquires the electrical quantity information of the station and the electrical quantity information of one section of the busbar, as well as the corresponding generator sets and reactive power compensation devices of the current busbar. Specifically, the host 10 acquires the real-time data and operation status information of the new energy power station connection point 30 (step-up substation), acquires the electrical quantity information such as real-time active power, reactive power, voltage, and frequency of the station, and acquires the electrical quantity information such as real-time active power, reactive power, voltage, and frequency of one section of the 10 kV or 35 kV busbar and the corresponding above electrical quantity information of the generator sets and reactive power compensation devices carried by this section of the busbar.

[0068] The slave 20 acquires the electrical quantity information of the other section of the busbar and the corresponding generator sets and reactive power compensation devices of the current busbar, and sends it to the host 10. Specifically, the slave 20 acquires the electrical quantity information such as real-time active power, reactive power, voltage, and frequency of the other section of the 10 kV or 35 kV busbar, and the corresponding above electrical quantity information of the generator sets and reactive power compensation devices carried by this section of the busbar, which is different from the data related to one section of the busbar acquired by the host 10. That is, if the host 10 acquires the data related to the 35 kV busbar, then the slave 20 acquires the data related to the 10 kV busbar. The slave 20 uploads all the collected data to the host 10, and the host 10 performs unified arithmetic processing.

[0069] In this embodiment, the electrical quantity information acquired by the host and the slave is the average electrical quantity information of multiple busbars corresponding to this voltage level busbar, or can also be the sum of the electrical quantity information of multiple busbars. This is to perform reactive power compensation for the busbars of the same voltage level.

[0070] The host 10 calculates the sum of the reactive powers of all the generator sets and reactive power compensation devices under each section of the low-voltage busbar at the 10 kV and 35 kV voltage levels in the current state based on the data it acquires itself and the data uploaded by the slave 20, including the real-time reactive power, the reactive power that can be increased, and the reactive power that can be decreased of the generator sets and reactive power compensation devices.

[0071] The host 10 summarizes according to the busbars of the two voltage levels of 10 kV and 35 kV, that is, the real-time reactive power, the reactive power that can be increased, and the reactive power that can be decreased of the generator sets and reactive power compensation devices carried by the 10 kV busbar; the real-time reactive power, the reactive power that can be increased, and the reactive power that can be decreased of the generator sets and reactive power compensation devices carried by the 35 kV section of the busbar.

[0072] The host 10 calculates the difference between the voltage or reactive power of the assessment points of the new energy power station and the target value, and based on the real-time reactive power, the available increased reactive power, and the available decreased reactive power of the units and reactive power compensation devices carried by the 10 kV and 35 kV busbars calculated in the foregoing steps; and compares the real-time reactive power, the available increased reactive power, and the available decreased reactive power of the units and reactive power compensation devices carried by the 10 kV and 35 kV busbars. After correcting the target value, according to the comparison situation, it is allocated to the generating sets and reactive power compensation devices carried by one of the 10 kV or 35 kV busbars according to the margin / capacity strategy, and is also allocated to the slave 20. After receiving the adjustment amount of this section of the busbar sent by the host 10, the slave 20 performs calculations again and distributes to the generating sets and reactive power compensation devices carried by this section of the busbar.

[0073] Since both the program algorithm and the communication process are in the millisecond level, the above work can be basically completed simultaneously. Thus, after receiving the allocated target instructions, the generating sets and reactive power compensation devices of the entire station respond according to the instructions, thereby making the voltage or reactive power of the assessment points close to the target value, achieving the purpose of regulating the voltage or reactive power.

[0074] For the reactive power control strategies of the two voltage level busbars, reference can be made to the description of the control strategies in the above embodiments, which will not be elaborated in this embodiment.

[0075] Because the situations are complex and cannot be listed and elaborated one by one, those skilled in the art should be able to realize that there can be many examples according to the basic method principles provided in this application combined with the actual situation. Without sufficient creative labor, they should all be within the protection scope of this application.

[0076] Please refer to the following Figure 4 , Figure 4 which is a structural block diagram of a substation reactive power control device 400 provided in an embodiment of the present application. This embodiment exists as a device embodiment corresponding to the above method embodiment. The substation reactive power control device 400 may include:

[0077] A real-time operation data acquisition unit 401, configured to acquire the real-time operation data of the generating sets and reactive power compensation devices carried by the busbars of different voltage levels in the target power station;

[0078] A real-time electrical quantity information acquisition unit 402, configured to acquire the real-time electrical quantity information of the booster station in the target power station; wherein, the real-time electrical quantity information includes: real-time active power, reactive power, voltage, and frequency;

[0079] A reactive power sum calculation unit 403, configured to calculate the sum of the reactive powers of all the generating sets and reactive power compensation devices under the busbars of different voltage levels in the current state according to the real-time operation data and the real-time electrical quantity information; wherein, the sum of the reactive powers is the sum of the real-time reactive power, the available increased reactive power, and the available decreased reactive power;

[0080] The difference calculation and adjustment component determination unit 404 is configured to calculate the difference between the actual assessment parameter and the target parameter of the assessment point in the target substation, and determine the adjustment components corresponding to different voltage-level buses respectively from the total adjustment amount served by the difference through a preset allocation strategy; wherein, the actual assessment parameter is the assessment parameter corresponding to the sum of reactive power.

[0081] The adjustment unit 405 is configured to adjust the corresponding voltage-level bus according to the adjustment component corresponding to the corresponding voltage-level bus.

[0082] In some other embodiments of the present application, the difference calculation and adjustment component determination unit 404 includes a difference calculation sub-unit configured to calculate the difference between the actual assessment parameter and the target parameter of the assessment point in the target substation, and the difference calculation sub-unit can be further configured to:

[0083] Calculate the voltage difference between the actual voltage and the target voltage value of the assessment point in the target substation.

[0084] In some other embodiments of the present application, the difference calculation and adjustment component determination unit 404 includes a difference calculation sub-unit configured to calculate the difference between the actual assessment parameter and the target parameter of the assessment point in the target substation, and the difference calculation sub-unit can be further configured to:

[0085] Calculate the reactive power difference between the actual reactive power and the target reactive power of the assessment point in the target substation.

[0086] In some other embodiments of the present application, the difference calculation and adjustment component determination unit 404 includes an adjustment component determination sub-unit configured to determine the adjustment components corresponding to different voltage-level buses respectively from the total adjustment amount served by the difference through a preset allocation strategy, and the adjustment component determination sub-unit can be further configured to:

[0087] Determine the adjustment components corresponding to different voltage-level buses respectively from the total adjustment amount served by the difference according to the margin strategy.

[0088] In some other embodiments of the present application, the difference calculation and adjustment component determination unit 404 includes an adjustment component determination sub-unit configured to determine the adjustment components corresponding to different voltage-level buses respectively from the total adjustment amount served by the difference through a preset allocation strategy, and the adjustment component determination sub-unit can be further configured to:

[0089] Determine the adjustment components corresponding to different voltage-level buses respectively from the total adjustment amount served by the difference according to the equal margin strategy.

[0090] In some other embodiments of the present application, the substation reactive power control device 400 may further include:

[0091] A first locking control unit configured to lock the reactive power / voltage adjustment of the corresponding bus section only in response to the reactive power capacity carried by any bus section reaching a preset first limit value.

[0092] In some other embodiments of the present application, the substation reactive power control device 400 may further include:

[0093] A second locking control unit configured to perform locking control on the bus voltages of all voltage levels and the grid connection point voltage in the target substation in response to the reactive power capacity carried by any bus section reaching a preset second limit value.

[0094] This embodiment exists as a device embodiment corresponding to the above method embodiment. The substation reactive power control device provided in this embodiment can divide the connected controlled reactive power devices according to their different voltage levels for a substation with multiple low-voltage buses and inconsistent low-voltage levels. By referring to the reactive power of the grid connection point of the whole station, calculate and distribute reactive power according to the voltage level, and fully consider the inconsistent reactive power source capacities carried by the two different voltage level buses during the distribution, and distribute with a suitable distribution strategy to avoid unreasonable distribution during the adjustment process and improve the rationality of distribution and adjustment.

[0095] Based on the above embodiments, the present application further provides an electronic device, which may include a memory and a processor. Among them, the memory stores a computer program. When the processor calls the computer program in the memory, the steps provided in the above embodiments can be implemented. Of course, the electronic device may further include various necessary network interfaces, power supplies, and other components, etc.

[0096] The present application further provides a computer-readable storage medium, on which a computer program is stored. When the computer program is executed by a terminal or a processor, the steps provided in the above embodiments can be implemented. The storage medium may include: various media that can store program codes such as USB flash drives, mobile hard disks, read-only memories (ROM), random access memories (RAM), magnetic disks, or optical discs.

[0097] The embodiments in the specification are described in a progressive manner. The key point of each embodiment is to illustrate the differences from other embodiments. The same or similar parts among the embodiments can be referred to each other. For the device disclosed in the embodiment, since it corresponds to the method disclosed in the embodiment, the description is relatively simple, and the relevant parts can be referred to the description in the method part.

[0098] Those skilled in the art may further realize that the units and algorithm steps of each example described in combination with the embodiments disclosed herein can be implemented by electronic hardware, computer software, or a combination of the two. To clearly illustrate the interchangeability of hardware and software, the composition and steps of each example have been generally described according to functions in the above description. Whether these functions are executed in a hardware or software manner depends on the specific application and design constraints of the technical solution. Those skilled in the art can use different methods for each specific application to implement the described functions, but such implementation should not be considered to exceed the scope of this application.

[0099] Specific examples are used in this article to elaborate on the principles and implementation manners of this application. The description of the above embodiments is only used to help understand the method and its core idea of this application. For those of ordinary skill in the art of this technology, without departing from the principle of this application, several improvements and modifications can still be made to this application, and these improvements and modifications also fall within the protection scope of the claims of this application.

[0100] It should also be noted that in this specification, relational terms such as "first" and "second" are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the term "comprising", "including" or any other variant thereof is intended to cover non-exclusive inclusion, so that a process, method, article or device comprising a series of elements not only includes those elements, but also includes other elements not expressly listed, or further includes elements inherent to such process, method, article or device. Without further limitation, an element defined by the statement "comprising one..." does not exclude the existence of additional identical elements in the process, method, article or device comprising the element.

Claims

1. A reactive power control method for a substation, characterized in that: include: Acquire the real-time operation data of the generator sets and reactive power compensation devices respectively carried by buses of different voltage levels in the target station. The generator sets include wind power generator sets or photovoltaic generator sets. One bus of buses of different voltage levels corresponds to a host, and the other buses correspond to slaves one by one. Buses of different voltage levels have different reactive power capacity sources. Acquire the real-time electrical quantity information of the booster station in the target station; wherein the real-time electrical quantity information includes: real-time active power, reactive power, voltage, and frequency; specifically, the host acquires the real-time electrical quantity information on the corresponding bus, and the slave acquires the real-time electrical quantity information on the corresponding bus, and uploads it to the host at the same time; the electrical quantity information acquired by the host and the slave is the average electrical quantity information of multiple buses in the bus corresponding to the voltage level; According to the real-time operation data and the real-time electrical quantity information, the sum of reactive power of all generator sets and reactive power compensation devices under buses of different voltage levels in the current state is calculated; wherein the sum of reactive power is the sum of real-time reactive power, increaseable reactive power and decreaseable reactive power; The host calculates the difference between the actual assessment parameter and the target parameter of the assessment point in the target station, and determines the components to be adjusted corresponding to buses of different voltage levels respectively using the total amount to be adjusted represented by the difference through a preset allocation strategy; wherein the actual assessment parameter is the assessment parameter corresponding to the sum of the reactive power; The host compares the real-time reactive power, increaseable reactive power, and decreaseable reactive power of the generators and reactive compensation devices on buses of different voltage levels. Based on the comparison, the host allocates the reactive power to the generators and reactive compensation devices on the bus corresponding to the host according to the margin / capacity strategy, and to the slaves. After receiving the adjustment amount of the bus corresponding to the slave sent by the host, the slave performs calculation again and allocates it to the generators and reactive compensation devices on the bus corresponding to the slave; the corresponding voltage level bus is adjusted according to the to-be-adjusted component corresponding to the corresponding voltage level bus; In response to the reactive capacity carried by any section of the bus reaching a preset second limit value, all voltage level buses and grid connection point voltages in the target station are locked and controlled.

2. The method according to claim 1, characterized in that The calculating the difference between the actual assessment parameter and the target parameter of the assessment point in the target station includes: Calculate the voltage difference between the actual voltage of the assessment point in the target station and the target voltage value.

3. The method according to claim 1, characterized in that The calculating the difference between the actual assessment parameter and the target parameter of the assessment point in the target station includes: Calculate the reactive power difference between the actual reactive power and the target reactive power of the assessment point in the target station.

4. The method according to claim 1, characterized in that: The total amount to be adjusted that will be served by the difference is determined by a preset allocation strategy to be the components to be adjusted that correspond to buses of different voltage levels, including: The total amount to be adjusted, which is represented by the difference, is used to determine the components to be adjusted corresponding to buses of different voltage levels according to the margin strategy.

5. The method according to claim 1, characterized in that The total amount to be adjusted that will be served by the difference is determined by a preset allocation strategy to be the components to be adjusted that correspond to buses of different voltage levels, including: The total amount to be adjusted, which is represented by the difference, is used to determine the components to be adjusted corresponding to buses of different voltage levels according to the margin equalization strategy.

6. A reactive power control device for a substation, characterized in that: include: The real-time operation data acquisition unit is configured to acquire the real-time operation data of the generator sets and reactive power compensation devices respectively carried by buses of different voltage levels in the target station, wherein the generator sets include wind power generator sets or photovoltaic generator sets, one bus of the buses of different voltage levels corresponds to a host, and the other buses correspond to slaves one by one, and the buses of different voltage levels correspond to different reactive power capacity sources; The real-time electrical quantity information acquisition unit is configured to acquire the real-time electrical quantity information of the booster station in the target station; wherein the real-time electrical quantity information includes: real-time active power, reactive power, voltage, and frequency; specifically, the host acquires the real-time electrical quantity information on the corresponding bus, and the slave acquires the real-time electrical quantity information on the corresponding bus, and uploads it to the host at the same time; the electrical quantity information acquired by the host and the slave is the average electrical quantity information of multiple buses in the bus corresponding to the voltage level; The reactive power sum calculation unit is configured to calculate the reactive power sum of all generator sets and reactive power compensation devices under buses of different voltage levels in the current state according to the real-time operation data and the real-time electrical quantity information; wherein the reactive power sum is the sum of real-time reactive power, increaseable reactive power and decreaseable reactive power; The difference calculation and to-be-adjusted component determination unit is configured to calculate the difference between the actual assessment parameter and the target parameter of the assessment point in the target station, and determine the to-be-adjusted components corresponding to buses of different voltage levels respectively using the total amount to be adjusted represented by the difference through a preset allocation strategy; wherein the actual assessment parameter is an assessment parameter corresponding to the sum of the reactive power; The adjustment unit is configured to adjust the corresponding voltage level bus according to the to-be-adjusted component corresponding to the corresponding voltage level bus. The host compares the real-time reactive power, increaseable reactive power, and decreaseable reactive power of the units and reactive compensation devices carried by buses of different voltage levels. Through the comparison, the host allocates the reactive power to the generator sets and reactive compensation devices carried by the bus corresponding to the host according to the margin / capacity strategy, and to the slave. After receiving the adjustment amount of the bus corresponding to the slave sent by the host, the slave performs calculation again and allocates it to the generator sets and reactive compensation devices carried by the bus corresponding to the slave. In response to the reactive capacity carried by any section of the bus reaching the preset second limit value, all voltage level buses and grid connection point voltages in the target station are locked and controlled.

7. An electronic device, characterized in that: include: Memory, for computer programs; A processor, configured to implement the steps of the substation reactive power control method as claimed in any one of claims 1 to 5 when executing the computer program stored in the memory.

8. A readable storage medium, characterized in that: The readable storage medium stores a computer program, and after being executed by a processor, the computer program can implement each step of the substation reactive power control method as described in any one of claims 1 to 5.

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