Power grid partition active balance correction method, system, equipment, medium and product

Abstract

The invention relates to the technical field of electric power systems, and discloses a power grid partition active balance correction method, system, device, medium and product. According to the method, power grid partitions are divided, the active unbalance amount of each power grid partition is determined, and the abnormal power flow power grid partitions are effectively recognized; determining the power adjustable space of each generator set according to the active unbalance amount of each abnormal tidal current power grid partition and the current active power of each generator set, and sharing the active balance correction value of each generator set in each abnormal tidal current power grid partition; and the active balance amount of each abnormal power flow power grid partition is corrected to a specified active balance range according to the allocation result, so that resource allocation is optimized, damage to a generator set is avoided, the problem of power grid partition active unbalance frequently occurring in real-time operation data of a power grid is also solved, and the service life of the power grid is prolonged. The deviation between the on-line safety analysis calculation result and the actual power grid operation condition is reduced, and the reliability of the on-line safety analysis calculation result is improved.

Description

Technical Field

[0001] The present invention relates to the technical field of power systems, and in particular, to a method, system, device, medium, and product for correcting active power balance in power grid partitions. Background Art

[0002] In order to cope with the increasing risks of secure and stable operation of the power grid, dispatchers at all levels usually conduct online security analysis rolling scans based on real-time power grid operation data, and formulate corresponding auxiliary decision-making suggestions for the discovered security and stability problems or potential hazards, so as to improve the dispatcher's ability to control large power grids.

[0003] Due to reasons such as measurement errors, communication delays, and equipment failures, the real-time power grid operation data often has problems of active power imbalance in power grid partitions, resulting in a large deviation between the online security analysis calculation results and the actual power grid operation situation, and even the situation where the online security analysis calculation results are completely untrustworthy may occur. Summary of the Invention

[0004] In view of this, the present invention provides a method, system, device, medium, and product for correcting active power balance in power grid partitions, which solves the technical problem that the real-time power grid operation data often has problems of active power imbalance in power grid partitions, resulting in a large deviation between the online security analysis calculation results and the actual power grid operation situation, and even the situation where the online security analysis calculation results are completely untrustworthy may occur.

[0005] The first aspect of the present invention provides a method for correcting active power balance in power grid partitions, including:

[0006] Partition the power grid according to the power grid topology structure and tie lines to obtain multiple power grid partitions;

[0007] Determine the active power imbalance of multiple said power grid partitions, and determine multiple abnormal power flow power grid partitions according to the active power imbalance;

[0008] Determine the power adjustable space of each generator set according to the active power imbalance of each abnormal power flow power grid partition and the current active power of each generator set;

[0009] According to the power adjustable space of each generator set, allocate the active power balance correction value of each generator set in each abnormal power flow power grid partition, and correct the active power imbalance of each abnormal power flow power grid partition to a specified active power balance range according to the allocation result.

[0010] Optionally, the partitioning the power grid according to the power grid topology structure and tie lines to obtain multiple power grid partitions includes:

[0011] Take the tie line in the power grid as the boundary of the power grid partition, and identify the topological relationships of the devices in each power grid partition according to the power grid topology structure, so as to obtain a plurality of the power grid partitions; wherein, the devices include generator sets and load devices.

[0012] Optionally, the determining the active power imbalance of a plurality of the power grid partitions and determining a plurality of abnormal power flow grid partitions according to the active power imbalance includes:

[0013] Determine the active power imbalance of each power grid partition according to the difference between the active power of the generator sets in each power grid partition and the active power of all load devices;

[0014] For each power grid partition, compare the size of the active power imbalance with a preset active power imbalance threshold;

[0015] In the case where the active power imbalance is greater than the preset active power imbalance threshold, determine the power grid partition as the abnormal power flow grid partition, and obtain a plurality of the abnormal power flow grid partitions.

[0016] Optionally, the determining the power adjustable space of each generator set according to the active power imbalance of each abnormal power flow grid partition and the current active power of each generator set includes:

[0017] Determine the active power balance correction direction of the abnormal power flow grid partition according to the active power imbalance; the active power balance correction direction is used to represent active power upward correction or active power downward correction;

[0018] Based on the active power balance correction direction, determine the power adjustable space of each generator set according to the current active power of each generator set.

[0019] Optionally, when the active power balance correction direction is active power upward correction;

[0020] The determining the power adjustable space of each generator set according to the current active power of each generator set based on the active power balance correction direction includes:

[0021] Determine the lower limit of the maximum active power of each generator set according to the lower limit of the multi-source active power of each generator set;

[0022] Determine the power adjustable space of each generator set according to the lower limit of the maximum active power of each generator set and the current active power of each generator set.

[0023] Optionally, when the active power balance correction direction is active power downward correction;

[0024] Based on the active power balance correction direction, determining the power adjustable space of each of the generating sets according to the current active power of each of the generating sets, includes:

[0025] Determining the minimum active power upper limit of each of the generating sets according to the multi-source active power upper limits of each of the generating sets;

[0026] Determining the power adjustable space of each of the generating sets according to the minimum active power upper limit and the current active power of each of the generating sets.

[0027] Optionally, allocating the active power balance correction value of each generating set in each abnormal power flow grid partition according to the power adjustable space of each generating set, and correcting the active power balance amount of each abnormal power flow grid partition to a specified active power balance range, includes:

[0028] For each abnormal power flow grid partition, excluding the generating sets with zero power adjustable space from the abnormal power flow grid partition to obtain adjustable generating sets;

[0029] Determining the initial active power balance correction value of each adjustable generating set according to the active power imbalance amount and the regulation difference coefficient of each adjustable generating set;

[0030] Comparing the size of the initial active power balance correction value and the power adjustable space of the adjustable generating sets, and determining the active power balance correction value of each adjustable generating set according to the comparison result;

[0031] Determining the remaining active power imbalance amount of the abnormal power flow grid partition according to the difference between the active power imbalance amount and the active power balance correction value of each adjustable generating set;

[0032] Comparing the size of the remaining active power imbalance amount and a preset active power imbalance threshold;

[0033] When the remaining active power imbalance amount is less than the preset active power imbalance threshold, stopping the active power balance correction of the abnormal power flow grid partition;

[0034] When the remaining active power imbalance amount is not less than the preset active power imbalance threshold, updating the active power imbalance amount according to the remaining active power imbalance amount, and turning to the step of determining the active power imbalance amounts of multiple grid partitions and determining multiple abnormal power flow grid partitions according to the active power imbalance amounts.

[0035] In a second aspect, the present invention provides a power grid partition active power balance correction system, including:

[0036] A power grid zoning module, configured to zone the power grid according to the power grid topology and tie lines, and obtain multiple power grid zones;

[0037] An abnormal zone determination module, configured to determine the active power imbalance of the multiple power grid zones, and determine multiple abnormal power flow grid zones according to the active power imbalance;

[0038] An adjustable space determination module, configured to determine the power adjustable space of each generator set according to the active power imbalance of each abnormal power flow grid zone and the current active power of each generator set;

[0039] An active power balance correction module, configured to allocate the active power balance correction values of the generator sets in each abnormal power flow grid zone according to the power adjustable space of each generator set, and correct the active power imbalance of each abnormal power flow grid zone to a specified active power balance range according to the allocation result.

[0040] In a third aspect, the present invention provides an electronic device, where the electronic device includes a memory and a processor, and a computer program is stored in the memory. When the computer program is executed by the processor, the processor executes the steps of the power grid zoning active power balance correction method as described in the first aspect.

[0041] In a fourth aspect, the present invention provides a computer-readable storage medium, on which a computer program is stored. When the computer program is executed, the steps of the power grid zoning active power balance correction method as described in the first aspect are implemented.

[0042] In a fifth aspect, the present invention provides a computer program product, where the computer program product includes a computer program stored on a non-transitory computer-readable storage medium, and the computer program includes program instructions. When the program instructions are executed by a computer, the computer executes the steps of the power grid zoning active power balance correction method as described in the first aspect.

[0043] It can be seen from the above technical solutions that the present invention zones the power grid, determines the active power imbalance of each power grid zone, effectively identifies abnormal power flow grid zones, then determines the power adjustable space of each generator set according to the active power imbalance of each abnormal power flow grid zone and the current active power of each generator set, allocates the active power balance correction values of the generator sets in each abnormal power flow grid zone, and corrects the active power imbalance of each abnormal power flow grid zone to a specified active power balance range according to the allocation result, thereby optimizing resource allocation, avoiding damage to the generator sets, solving the problem of active power imbalance in power grid zoning that often occurs in real-time operation data of the power grid, reducing the deviation between the online security analysis calculation result and the actual power grid operation situation, and improving the reliability of the online security analysis calculation result. Description of the Drawings

[0044] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings required for the description of the embodiments or the prior art. Obviously, the drawings in the following description are only some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can be obtained based on these drawings.

[0045] Figure 1 It is an application environment diagram of a method for correcting active power balance in power grid partitions provided by an embodiment of the present invention;

[0046] Figure 2 It is a flowchart of a method for correcting active power balance in power grid partitions provided by an embodiment of the present invention;

[0047] Figure 3 It is a schematic structural diagram of a system for correcting active power balance in power grid partitions provided by an embodiment of the present invention;

[0048] Figure 4 It is a schematic structural diagram of an electronic device provided by an embodiment of the present invention. Detailed implementation manners

[0049] In order to enable those skilled in the art to better understand the solution of the present invention, the following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the drawings in the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, rather than all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts belong to the scope of protection of the present invention.

[0050] The method for correcting active power balance in power grid partitions provided by the embodiments of the present application can be applied to an application environment as Figure 1 shown. Among them, the terminal 101 communicates with the server 102 through the network. The data storage system can store the data that the server 102 needs to process. The data storage system can be integrated on the server 102, or placed in the cloud or other network servers. The terminal 101 or the server 102 partitions the power grid according to the power grid topology and tie lines to obtain multiple power grid partitions; determines the active power imbalance of the multiple power grid partitions, and determines multiple abnormal power flow power grid partitions according to the active power imbalance; determines the power adjustable space of each generating unit according to the active power imbalance of each abnormal power flow power grid partition and the current active power of each generating unit; apportions the active power balance correction value of each generating unit in each abnormal power flow power grid partition according to the power adjustable space of each generating unit, and corrects the active power imbalance of each abnormal power flow power grid partition to the specified active power balance range according to the apportionment result.

[0051] The terminal 101 can be, but is not limited to, various personal computers, laptop computers, smart phones, tablet computers, etc.

[0052] The server 102 can be an independent physical server, a server cluster or a distributed system composed of multiple physical servers, or a cloud server providing cloud computing services.

[0053] Such as Figure 2 As shown, the embodiment of the present application provides a method for correcting the active power balance of power grid partitions. Taking the application of this method to Figure 1 the terminal 101 or the server 102 in as an example, it includes the following steps S1 to S4. Among them:

[0054] Step S1: Partition the power grid according to the power grid topology and tie lines to obtain multiple power grid partitions.

[0055] Among them, the power grid partition is to divide the large-scale power grid into several relatively independent and clearly defined power grid partitions according to the actual situation and needs of power grid operation. Each power grid partition contains a certain number of generator sets and load devices and is connected to other power grid partitions through tie lines. In this way, the active power balance of each power grid partition can be managed and controlled more precisely, improving the safety and stability of power grid operation.

[0056] Among them, the power grid topology can be determined through existing power grid models (including static parameter information of generator sets, loads, converters, AC line terminals, transformer windings, etc. (resistance, reactance, physical nodes, etc.)), and the scope of each power grid partition in the power grid can be partitioned through tie lines.

[0057] Step S2: Determine the active power imbalance of multiple power grid partitions, and determine multiple abnormal power flow power grid partitions according to the active power imbalance.

[0058] Among them, the active power imbalance refers to the imbalance between the active power of the generator sets in the power grid partition and the active power of all load devices. When the absolute value of the active power imbalance exceeds the preset active power imbalance threshold, this power grid partition is determined as an abnormal power flow power grid partition. By calculating the active power imbalance of each power grid partition and determining the abnormal power flow power grid partition, the power imbalance area in the power grid can be accurately identified.

[0059] Step S3: Determine the power adjustable space of each generator set according to the active power imbalance of each abnormal power flow power grid partition and the current active power of each generator set.

[0060] Among them, the power adjustable range is the range of active power that the generator set can increase or decrease based on the current active power. Determining the power adjustable range of each generator set is for subsequent reasonable power adjustment according to the active power imbalance to achieve the active power balance correction of the power grid partition.

[0061] When determining the power adjustable range, it is necessary to consider the physical limitations, operating constraints, and safety and stability requirements of the generator set to ensure that the adjusted active power can meet the needs of the power grid and will not cause damage to the generator set or the power grid.

[0062] Step S4: According to the power adjustable range of each generator set, allocate the active power balance correction value of each generator set in each abnormal power flow power grid partition, and correct the active power balance of each abnormal power flow power grid partition to the specified active power balance range according to the allocation result.

[0063] Among them, the active power balance correction value is the value that needs to be calculated for each generator set to correct the active power balance of each power grid partition to the specified active power balance range.

[0064] According to the power adjustable range of each generator set, the active power balance correction value can be reasonably allocated to ensure that each generator set can be adjusted within its capacity. Finally, according to the allocation result, the active power balance of each power grid partition is corrected to the specified active power balance range, thereby realizing the balance control of the active power of the power grid and improving the stability and safety of the power grid operation.

[0065] It should be noted that in the embodiment of the present application, by partitioning the power grid and determining the active power imbalance of each power grid partition, the abnormal power flow power grid partition is effectively identified. Then, according to the active power imbalance of each abnormal power flow power grid partition and the current active power of each generator set, the power adjustable range of each generator set is determined, the active power balance correction value of each generator set in each abnormal power flow power grid partition is allocated, and the active power balance of each abnormal power flow power grid partition is corrected to the specified active power balance range according to the allocation result, thereby optimizing the resource allocation, avoiding damage to the generator set, solving the problem of active power imbalance in the power grid partition in the real-time operation data of the power grid, reducing the deviation between the online security analysis calculation result and the actual power grid operation situation, and improving the reliability of the online security analysis calculation result.

[0066] The following introduces the process of partitioning the power grid according to the power grid topology structure and tie lines to obtain multiple power grid partitions, including:

[0067] Taking the tie lines in the power grid as the boundaries of the power grid partitions, and according to the power grid topology structure, identifying the topological relationships of the devices in each power grid partition to obtain multiple power grid partitions; among them, the devices include generator sets and load devices.

[0068] Among them, the sectionalized tie lines are disconnected, and the breadth-first search algorithm is used to start from the boundary nodes of the tie lines and traverse and search along the expansion direction away from the tie lines to obtain the topological relationships of the devices in each power grid section. Among them, the generating sets include thermal power, hydropower and gas generating units, and the load devices include loads, converters, AC line terminals and transformer windings, etc.

[0069] The following introduces the process of determining the active power imbalance of multiple power grid sections and determining multiple abnormal power flow power grid sections according to the active power imbalance, including:

[0070] Step S201: Determine the active power imbalance of each power grid section according to the difference between the active power of the generating sets in each power grid section and the active power of all load devices.

[0071] Among them, each power grid section includes generating sets, loads, converters, AC line terminals and transformer windings. The calculation process of the active power imbalance of the power grid section is as follows:

[0072]

[0073] In the formula, is the active power imbalance of the power grid section , is the number of generating sets included in the power grid section , is the number of loads included in the power grid section , is the number of converters included in the power grid section , is the number of AC line terminals included in the power grid section , is the number of transformer windings included in the power grid section , is the active power of the generating set in the power grid section , is the active power of the load in the power grid section , is the active power on the AC side of the converter in the power grid section , is the active power of the AC line terminal in the power grid section , is the active power of the transformer winding in the power grid section .

[0074] Step S202: For each power grid section, compare the magnitude of the active power imbalance with a preset active power imbalance threshold.

[0075] Among them, the preset active power imbalance threshold is determined according to the active power of the load and the active power imbalance coefficient in the power grid partition and the active power imbalance coefficient is generally a fixed parameter.

[0076] Step S203: When the active power imbalance is greater than the preset active power imbalance threshold, determine the power grid partition with abnormal power flow as an abnormal power flow grid partition, and obtain multiple abnormal power flow grid partitions.

[0077] Among them, the situation where the active power imbalance is greater than the preset active power imbalance threshold is:

[0078]

[0079] In the formula, is the preset active power imbalance coefficient.

[0080] It can be understood that determining the power grid partition with active power imbalance greater than the preset active power imbalance threshold as an abnormal power flow grid partition is because the degree of active power imbalance in the power grid partition is relatively high, which may have an adverse impact on the stable operation of the power grid. By performing active power balance correction on these abnormal power flow grid partitions, the active power imbalance can be reduced, and the stability and security of the power grid can be improved.

[0081] The following introduces the process of determining the power adjustable space of each generator set according to the active power imbalance of each abnormal power flow grid partition and the current active power of each generator set, including:

[0082] Step S301: Determine the active power balance correction direction of the abnormal power flow grid partition according to the active power imbalance; the active power balance correction direction is used to represent the upward correction of active power or the downward correction of active power.

[0083] Among them, when the active power imbalance is greater than zero, it means that the active power needs to be reduced. When the active power imbalance is less than zero, it means that the active power needs to be increased, so as to determine the active power balance correction direction.

[0084] Step S302: Based on the active power balance correction direction, determine the power adjustable space of each generator set according to the current active power of each generator set.

[0085] In an example, when the active power balance correction direction is the upward correction of active power;

[0086] Based on the active power balance correction direction, determine the power adjustable space of each generator set according to the current active power of each generator set, including:

[0087] Step S3021: Determine the maximum active power lower limit of each generating unit according to the multi-source active power lower limit of each generating unit.

[0088] Among them, the multi-source active power lower limit refers to the active power lower limit of the generating unit under multiple information sources, including the active power lower limit of the power grid model of the generating unit in the power grid partition the minimum technical output in the Automatic Generation Control (AGC) system of the generating unit in the power grid partition and the minimum output reported by the power plant of the generating unit in the power grid partition. of the generating unit in the power grid partition.

[0089] By determining the maximum active power lower limit of the generating unit, it can provide a reference for subsequent power adjustment, ensuring that the generating unit will not be lower than this lower limit value during the adjustment process, so as to maintain a stable operating state.

[0090] Step S3022: Determine the power adjustable space of each generating unit according to the maximum active power lower limit and the current active power of each generating unit.

[0091] Among them, the power adjustable space of the generating unit is expressed as:

[0092]

[0093] In the formula, is the active power down-regulation space of the generating unit in the power grid partition of the generating unit in the power grid partition, is the active power output of the generating unit in the power grid partition of the generating unit in the power grid partition, is the active power lower limit of the power grid model of the generating unit in the power grid partition of the generating unit is the minimum technical output in the Automatic Generation Control (AGC) system of the generating unit in the power grid partition of the generating unit is the minimum output reported by the power plant of the generating unit in the power grid partition of the generating unit in the power grid partition.

[0094] In another example, when the active power balance correction direction is the active power down-regulation correction;

[0095] Based on the active power balance correction direction, determine the power adjustable space of each generating unit according to the current active power of each generating unit, including:

[0096] Step S3121: Determine the minimum active power upper limit of each generating unit according to the multi-source active power upper limit of each generating unit.

[0097] Among them, the multi-source active power upper limit refers to the active power upper limit of the generating unit under multiple information sources, including the active power upper limit of the grid model of the generating unit in the grid partition the active power upper limit of the generating unit in the grid partition the maximum technical output in the Automatic Generation Control (AGC) system of the generating unit in the grid partition and the maximum output reported by the power plant of the generating unit in the grid partition of the generating unit.

[0098] By determining the minimum active power upper limit of the generating unit, it can provide a reference for subsequent power adjustment, ensuring that the generating unit will not exceed this upper limit value during the adjustment process, so as to maintain a stable operating state.

[0099] Step S3122: Determine the power adjustable space of each generating unit according to the minimum active power upper limit and the current active power of each generating unit.

[0100] Among them, the power adjustable space of the generating unit is expressed as:

[0101]

[0102] In the formula, is the upward adjustable space of the generating unit in the grid partition of the generating unit is the upward adjustable space, is the active power upper limit of the grid model of the generating unit in the grid partition of the generating unit is the AGC maximum technical output of the generating unit in the grid partition of the generating unit is the maximum output reported by the power plant of the generating unit in the grid partition of the generating unit is the maximum output reported by the power plant of the generating unit in the grid partition of the generating unit of the generating unit.

[0103] The following describes the process of allocating the active power balance correction value of each generating unit in each abnormal power flow grid partition according to the power adjustable space of each generating unit, and correcting the active power balance of each abnormal power flow grid partition to the specified active power balance range, including:

[0104] Step S401: For each abnormal power flow grid partition, exclude the generating units with zero power adjustable space from the abnormal power flow grid partition to obtain adjustable generating units.

[0105] Among them, by screening the power adjustable space of the generator sets, those generator sets that cannot participate in the active power balance correction are excluded, ensuring that the generator sets participating in the correction have a certain power adjustment ability. This process is to optimize the correction effect and improve the correction efficiency.

[0106] Step S402: Determine the initial active power balance correction values of each adjustable generator set according to the active power imbalance and the regulation rate of each adjustable generator set.

[0107] Among them, through proportional distribution of the active power imbalance and the regulation rate of the adjustable generator sets, the initial active power balance correction values of each generator set are obtained. The regulation rate reflects the sensitivity of the generator set to the change of active power. By reasonably setting the regulation rate, it can be ensured that each generator set participates in the active power balance correction according to the expected proportion, realizing the balanced distribution of power. The regulation rate is generally a fixed value.

[0108] The calculation formula for the initial active power balance correction value of the adjustable generator set is:

[0109]

[0110] In the formula, is the initial active power balance correction value of the generator set in the power grid partition , is the regulation rate of the generator set in the power grid partition , is the number of adjustable generator sets in the power grid partition.

[0111] Step S403: Compare the size of the initial active power balance correction value and the power adjustable space of the adjustable generator set, and determine the active power balance correction value of each adjustable generator set according to the comparison result.

[0112] It can be understood that the determination of the active power balance correction value needs to consider the actual power adjustment ability of the generator set. When the initial active power balance correction value is greater than the power adjustable space of the generator set, the active power balance correction value should be limited to the power adjustable space of the generator set and adjusted to this range to avoid unstable operation of the generator set caused by excessive adjustment. On the contrary, when the initial active power balance correction value is less than or equal to the power adjustable space of the generator set, the active power balance correction value can be directly determined as the initial value to ensure the accuracy and effectiveness of power correction. Through this process, it can be ensured that each generator set can meet the requirements of the power grid and maintain a stable operating state during the active power balance correction process.

[0113] Specifically, the process of comparing the size of the initial active power balance correction value and the power adjustable space of the adjustable generator set is as follows:

[0114]

[0115]

[0116] In the formula, is the power grid sub - region the adjustable generating units in the active power balance correction value.

[0117] Step S404: Determine the remaining active power imbalance of the abnormal power flow power grid sub - region according to the difference between the active power imbalance and the active power balance correction values of each adjustable generating unit.

[0118] Among them, the remaining active power imbalance of the abnormal power flow power grid sub - region is determined according to the following formula:

[0119]

[0120] In the formula, is the remaining active power imbalance of the power grid sub - region

[0121] Step S405: Compare the size of the remaining active power imbalance and the preset active power imbalance threshold.

[0122] Step S406: When the remaining active power imbalance is less than the preset active power imbalance threshold, stop the active power balance correction of the abnormal power flow power grid sub - region;

[0123] Step S407: When the remaining active power imbalance is not less than the preset active power imbalance threshold, update the active power imbalance according to the remaining active power imbalance, and go back to the step of determining the active power imbalances of multiple power grid sub - regions and determining multiple abnormal power flow power grid sub - regions according to the active power imbalances.

[0124] Among them, if the remaining active power imbalance of the abnormal power flow power grid sub - region satisfies the following formula, it means that the active power has reached the ideal balance, then stop the active power balance correction of this abnormal power flow power grid sub - region, otherwise, the active power balance correction needs to be carried out again. Among them, the condition for the active power to reach the ideal balance is:

[0125] .

[0126] ​In summary, the active power balance correction method for power grid zoning provided by the embodiments of this application not only ensures the stable operation of the power grid through a refined power adjustment strategy, but also effectively improves the energy efficiency of the power grid. When the remaining active power imbalance is less than the preset active power imbalance threshold, it is determined that the active power of the current power grid has reached the ideal balance state, and at this time, the active power balance correction for the abnormal power flow power grid zoning is stopped. This decision is based on the safety and economy considerations of power grid operation, avoiding energy consumption and equipment losses caused by unnecessary power adjustments. However, when the remaining active power imbalance is not less than the preset active power imbalance threshold, it is determined that the active power balance state of the current power grid has not reached the ideal requirement and further correction is needed. At this time, the active power imbalance is updated according to the remaining active power imbalance, and the active power imbalance correction for multiple power grid zones is determined again. At the same time, multiple abnormal power flow power grid zones are determined according to the active power imbalance, which reflects the dynamic adjustment ability and continuous monitoring of the power grid state, ensuring that the power grid always remains stable and effective in a complex and changeable operating environment.

[0127] Based on the same inventive concept, the embodiments of this application also provide a power grid zoning active power balance correction system for implementing the above-mentioned power grid zoning active power balance correction method.

[0128] The implementation solutions provided by this system to solve problems are similar to those recorded in the above method. Therefore, the specific limitations in one or more embodiments of the power grid zoning active power balance correction system provided below can refer to the limitations on the power grid zoning active power balance correction method in the above text, and will not be repeated here.

[0129] As Figure 3 shown, the embodiments of this application provide a power grid zoning active power balance correction system, including:

[0130] A power grid zoning module 100, configured to perform power grid zoning according to the power grid topology structure and tie lines to obtain multiple power grid zones;

[0131] An abnormal zone determination module 200, configured to determine the active power imbalance of multiple power grid zones, and determine multiple abnormal power flow power grid zones according to the active power imbalance;

[0132] An adjustable space determination module 300, configured to determine the power adjustable space of each generator set according to the active power imbalance of each abnormal power flow power grid zone and the current active power of each generator set;

[0133] An active power balance correction module 400, configured to allocate the active power balance correction values of each generator set in each abnormal power flow power grid zone according to the power adjustable space of each generator set, and correct the active power imbalance of each abnormal power flow power grid zone to a specified active power balance range according to the allocation result.

[0134] In some embodiments, the power grid zoning module 100 is configured to:

[0135] Use the tie lines in the power grid as the boundaries of power grid zoning, and identify the topological relationships of the devices in each power grid zone according to the power grid topological structure, so as to obtain multiple power grid zones; where the devices include generator sets and load devices.

[0136] In some embodiments, the abnormal zone determination module 200 is configured to:

[0137] Determine the active power imbalance of each power grid zone according to the difference between the active power of the generator sets in each power grid zone and the active power of all load devices;

[0138] For each power grid zone, compare the active power imbalance with a preset active power imbalance threshold;

[0139] In the case where the active power imbalance is greater than the preset active power imbalance threshold, determine the power grid zone as an abnormal power flow power grid zone, and obtain multiple abnormal power flow power grid zones.

[0140] In some embodiments, the adjustable space determination module 300 is configured to:

[0141] The direction determination module is configured to determine the active power balance correction direction of the abnormal power flow power grid zone according to the active power imbalance; the active power balance correction direction is used to represent active power upward correction or active power downward correction;

[0142] The adjustable space identification module is configured to determine the power adjustable space of each generator set based on the active power balance correction direction and according to the current active power of each generator set.

[0143] In some embodiments, when the active power balance correction direction is active power upward correction;

[0144] The adjustable space identification module is configured to:

[0145] Determine the lower limit of the maximum active power of each generator set according to the multi-source active power lower limit of each generator set;

[0146] Determine the power adjustable space of each generator set according to the lower limit of the maximum active power of each generator set and the current active power.

[0147] In some embodiments, when the active power balance correction direction is active power downward correction;

[0148] The adjustable space identification module is configured to:

[0149] Determine the upper limit of the minimum active power of each generator set according to the multi-source active power upper limit of each generator set;

[0150] Determine the power adjustable space of each generating unit according to the minimum active power upper limit and the current active power of each generating unit.

[0151] In some embodiments, the active power balance correction module 400 is configured to:

[0152] For each abnormal power flow grid partition, eliminate the generating units with zero power adjustable space from the abnormal power flow grid partition to obtain adjustable generating units;

[0153] Determine the initial active power balance correction value of each adjustable generating unit according to the active power imbalance and the regulation difference coefficient of each adjustable generating unit;

[0154] Compare the size of the initial active power balance correction value and the power adjustable space of the adjustable generating unit, and determine the active power balance correction value of each adjustable generating unit according to the comparison result;

[0155] Determine the remaining active power imbalance of the abnormal power flow grid partition according to the difference between the active power imbalance and the active power balance correction value of each adjustable generating unit;

[0156] Compare the size of the remaining active power imbalance and a preset active power imbalance threshold;

[0157] When the remaining active power imbalance is less than the preset active power imbalance threshold, stop the active power balance correction of the abnormal power flow grid partition;

[0158] When the remaining active power imbalance is not less than the preset active power imbalance threshold, update the active power imbalance according to the remaining active power imbalance, and go to determine the active power imbalance of multiple grid partitions, and determine multiple abnormal power flow grid partitions according to the active power imbalance.

[0159] As Figure 4 shown, an embodiment of the present application provides an electronic device. The electronic device 10 includes a memory 20 and a processor 30. A computer program is stored in the memory 20. When the computer program is executed by the processor 30, the processor 30 is caused to execute the steps of the active power balance correction method for grid partitions in the above embodiments.

[0160] An embodiment of the present application provides a computer-readable storage medium, on which a computer program is stored. When the computer program is executed, the steps of the active power balance correction method for grid partitions in the above embodiments are implemented.

[0161] An embodiment of the present application provides a computer program product. The computer program product includes a computer program stored on a non-transitory computer-readable storage medium. The computer program includes program instructions. When the program instructions are executed by a computer, the computer is caused to execute the steps of the active power balance correction method for grid partitions described in the above embodiments.

[0162] Those skilled in the art can clearly understand that for the convenience and brevity of description, the specific working processes of the systems, electronic devices, computer storage media, and computer program products described above can refer to the corresponding processes in the foregoing method embodiments and will not be elaborated herein.

[0163] It should be noted that the terms "including" and "having" and any variations thereof in the specification and claims of the present invention and the above-mentioned drawings are intended to cover non-exclusive inclusion. For example, a process, method, system, product, or device that includes a series of steps or units does not necessarily have to be limited to those steps or units clearly listed, but may include other steps or units not clearly listed or inherent to these processes, methods, products, or devices.

[0164] It should be understood that although the steps in the flowcharts involved in the above-described embodiments are shown in sequence according to the arrows, these steps do not necessarily have to be executed in the order indicated by the arrows. Unless otherwise clearly stated in this article, there is no strict order restriction for the execution of these steps, and these steps can be executed in other orders. Moreover, at least some of the steps in the flowcharts involved in the above-described embodiments may include multiple steps or multiple stages, and these steps or stages do not necessarily have to be executed at the same time, but can be executed at different times, and the execution order of these steps or stages does not necessarily have to be sequential, but can be executed alternately or in turn with at least some of the steps or stages in other steps or other steps.

[0165] In several embodiments provided by the present invention, it should be understood that the disclosed systems, electronic devices, computer storage media, computer program products, and methods can be implemented in other ways. For example, the device embodiments described above are merely illustrative. For example, the division of the units is only a logical function division, and there may be other division methods in actual implementation. For example, multiple units or components can be combined or integrated into another system, or some features can be ignored or not executed. Another point is that the displayed or discussed coupling or direct coupling or communication connection to each other can be through some interfaces, and the indirect coupling or communication connection of the devices or units can be in electrical, mechanical, or other forms.

[0166] The units described as separate components may or may not be physically separated, and the components displayed as units may or may not be physical units, that is, they may be located in one place, or may be distributed to multiple network units. Some or all of the units can be selected according to actual needs to achieve the purpose of the solution of this embodiment.

[0167] In addition, in each embodiment of the present invention, each functional unit may be integrated into a processing unit, may exist physically alone for each unit, or two or more units may be integrated into one unit. The above-mentioned integrated unit may be implemented in the form of hardware or in the form of a software functional unit.

[0168] If the above-mentioned integrated unit is implemented in the form of a software functional unit and sold or used as an independent product, it may be stored in a computer-readable storage medium. Based on such an understanding, the technical solution of the present invention, in essence, or the part that contributes to the prior art, or all or part of the technical solution, may be embodied in the form of a software product. The computer software product is stored in a storage medium and includes several instructions for a computer device (which may be a personal computer, a server, or a network device, etc.) to execute all or part of the steps of the methods described in each embodiment of the present invention. The aforementioned storage medium includes: various media such as USB flash drives, mobile hard disks, read-only memories (English full name: Read-Only Memory, English abbreviation: ROM), random access memories (English full name: Random Access Memory, English abbreviation: RAM), magnetic disks, or optical discs that can store program codes.

[0169] The above embodiments are only used to illustrate the technical solutions of the present invention and are not intended to limit them; although the present invention has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that they can still modify the technical solutions described in the foregoing embodiments, or perform equivalent replacements for some of the technical features; and these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of each embodiment of the present invention.

Claims

1. A method for correcting active power balance in power grid zoning, characterized in that Including: Partition the power grid according to the power grid topology structure and tie lines to obtain multiple power grid partitions; Determine the active power imbalance of multiple said power grid partitions, and determine multiple abnormal power flow power grid partitions according to the active power imbalance; Determine the power adjustable space of each said generating unit according to the active power imbalance of each said abnormal power flow power grid partition and the current active power of each generating unit; According to the power adjustable space of each said generating unit, allocate the active power balance correction value of each generating unit in each said abnormal power flow power grid partition, and correct the active power imbalance of each said abnormal power flow power grid partition to a specified active power balance range according to the allocation result.

2. The active power balance correction method for power grid zoning according to claim 1, characterized in that The partitioning the power grid according to the power grid topology structure and tie lines to obtain multiple power grid partitions includes: Use the tie lines in the power grid as the boundaries of the power grid partitions, and according to the power grid topology structure, identify the topological relationships of each device in each power grid partition to obtain multiple said power grid partitions; wherein, the devices include generating units and load devices.

3. The active power balance correction method for power grid zoning according to claim 2, characterized in that, The determining the active power imbalance of multiple said power grid partitions and determining multiple abnormal power flow power grid partitions according to the active power imbalance includes: Determine the active power imbalance of each said power grid partition according to the difference between the active power of the generating units in each said power grid partition and the active power of all load devices; For each said power grid partition, compare the size of the active power imbalance with a preset active power imbalance threshold; In the case where the active power imbalance is greater than the preset active power imbalance threshold, determine the power grid partition as the abnormal power flow power grid partition to obtain multiple said abnormal power flow power grid partitions.

4. The active power balance correction method for power grid zoning according to claim 1, characterized in that The determining the power adjustable space of each said generating unit according to the active power imbalance of each said abnormal power flow power grid partition and the current active power of each generating unit includes: Determine the active power balance correction direction of the abnormal power flow power grid partition according to the active power imbalance; the active power balance correction direction is used to represent active power upward correction or active power downward correction; Based on the active power balance correction direction, determine the power adjustable space of each said generating unit according to the current active power of each said generating unit.

5. The active power balance correction method for power grid zoning according to claim 4, characterized in that When the active power balance correction direction is active power upward correction; The based on the active power balance correction direction, determining the power adjustable space of each said generating unit according to the current active power of each said generating unit includes: Determine the maximum active power lower limit of each said generating unit according to the multi-source active power lower limit of each said generating unit; Determine the power adjustable space of each said generating unit according to the maximum active power lower limit and the current active power of each said generating unit.

6. The grid partition active power balance correction method according to claim 4, characterized in that When the active power balance correction direction is active power downward correction; The based on the active power balance correction direction, determining the power adjustable space of each said generating unit according to the current active power of each said generating unit includes: Determine the minimum active power upper limit of each said generating unit according to the multi-source active power upper limit of each said generating unit; Determine the power adjustable space of each generating set according to the upper limit of the minimum active power and the current active power of each generating set.

7. The active power balance correction method for power grid zoning according to any one of claims 1 to 6, characterized in that, The method of allocating the active power balance correction value of each generating set in each abnormal power flow grid partition according to the power adjustable space of each generating set, and correcting the active power balance of each abnormal power flow grid partition to a specified active power balance range includes: For each abnormal power flow grid partition, remove the generating sets with zero power adjustable space from the abnormal power flow grid partition to obtain adjustable generating sets; Determine the initial active power balance correction value of each adjustable generating set according to the active power imbalance and the regulation difference coefficient of each adjustable generating set; Compare the size of the initial active power balance correction value and the power adjustable space of the adjustable generating set, and determine the active power balance correction value of each adjustable generating set according to the comparison result; Determine the remaining active power imbalance of the abnormal power flow grid partition according to the difference between the active power imbalance and the active power balance correction value of each adjustable generating set; Compare the size of the remaining active power imbalance and a preset active power imbalance threshold; When the remaining active power imbalance is less than the preset active power imbalance threshold, stop the active power balance correction of the abnormal power flow grid partition; When the remaining active power imbalance is not less than the preset active power imbalance threshold, update the active power imbalance according to the remaining active power imbalance, and go to the step of determining the active power imbalance of multiple grid partitions and determining multiple abnormal power flow grid partitions according to the active power imbalance.

8. A power grid partition active power balance correction system, characterized in that, It includes: A grid partition module for partitioning the power grid according to the power grid topology and tie lines to obtain multiple grid partitions; An abnormal partition determination module for determining the active power imbalance of multiple grid partitions and determining multiple abnormal power flow grid partitions according to the active power imbalance; An adjustable space determination module for determining the power adjustable space of each generating set according to the active power imbalance of each abnormal power flow grid partition and the current active power of each generating set; An active power balance correction module for allocating the active power balance correction value of each generating set in each abnormal power flow grid partition according to the power adjustable space of each generating set, and correcting the active power balance of each abnormal power flow grid partition to a specified active power balance range.

9. An electronic device, characterized in that, The electronic device includes a memory and a processor. When the computer program stored in the memory is executed by the processor, the processor executes the steps of the power grid partition active power balance correction method according to any one of claims 1-7.

10. A computer-readable storage medium having a computer program stored thereon, characterized in that, When the computer program is executed, it realizes the steps of the power grid partition active power balance correction method according to any one of claims 1-7.

Images