A method and system for constructing power grid operation mode based on unified planning platform

Abstract

The present invention discloses a method and system for constructing a power grid operation mode based on a unified planning platform, including: determining a source power grid operation mode that matches a production simulation scenario; obtaining the power grid topology of the source power grid operation mode, and performing production simulation calculations, and performing power distribution, load distribution calculations, and cross-section power distribution according to the moment-by-moment calculation results of the sequential production simulation to achieve active power balance; determining the spatiotemporal range of the operation mode based on the source power grid operation mode, performing reactive power optimization and flow calculations on each partition within the spatiotemporal range to adjust reactive power balance; splicing the operation modes corresponding to all partitions to obtain the operation mode of the entire network. The method of the present invention utilizes the moment-by-moment startup schedule information, partition load information, and cross-section power information in the sequential production simulation results to quickly form a power grid operation mode and perform automatic adjustments to a certain extent, which can greatly improve the efficiency of compiling the operation mode.

Description

Technical Field

[0001] The present invention relates to the technical field of power optimization operation, and more specifically, to a method and system for constructing a power grid operation mode based on a unified planning platform. Background Art

[0002] Power system operation mode calculations, available in both offline and online modes, have long provided a strong guarantee for the safe and stable operation of my country's power grid. With the gradual increase in renewable energy penetration and the acceleration of the green and low-carbon transformation of the power industry, significant adjustments to the energy landscape will also bring profound changes to power grid development. Grid operation mode arrangements are compiled based on data from load forecasts, power generation planning, and grid planning. To adapt to the development of a new power system dominated by renewable energy, power system operation modes are becoming increasingly complex and diverse.

[0003] At present, the parallel collaborative working mode based on the digital power grid planning platform has gradually replaced the working mode based on data files and stand-alone simulation software. The platform generally adopts an integrated modeling method for equipment and power grid operation mode, such as the PSDB (POWER SYSTEM DATA BASE) unified planning platform, which refers to the national standard "Technical Requirements for Power Grid Equipment Model Parameters and Operation Mode Data" for the electromechanical transient simulation model parameter description method of power grid equipment, control systems and basic power grid topology, and describes the power grid topology connection with the busbar node as the core. All power grid equipment is connected through the busbar; the operation mode data includes basic information on the power grid operation mode, the equipment operating status and the electrical topology during operation. Starting from 2021, production simulation calculations and supply and demand balance analysis will also be carried out based on this unified planning platform. After three years of construction, the unified planning platform has accumulated a large amount of source, network and load basic equipment data; a large amount of operation mode data; and a large amount of planning scheme data. However, the compilation of power grid operation modes is still done manually. The compiled operation modes are greatly affected by the relevant professional knowledge and experience level of power grid planners. There are problems such as high workload intensity, low efficiency, and poor power flow convergence. It is difficult to meet the needs of formulating typical operation modes for large power grids with increasing scale and complexity. Summary of the Invention

[0004] The present invention proposes a method and system for constructing a power grid operation mode based on a unified planning platform to solve the problem of how to construct a power grid operation mode using production simulation calculation result information.

[0005] In order to solve the above problems, according to one aspect of the present invention, a method for constructing a power grid operation mode based on a unified planning platform is provided, the method comprising:

[0006] Determine the source grid operation mode that matches the production simulation scenario;

[0007] Obtaining the grid topology of the source grid operation mode, performing production simulation calculations, and performing power distribution, load distribution, and section power distribution based on the moment-by-moment calculation results of the time-series production simulation to achieve active power balance;

[0008] Determine the time and space range of the operation mode based on the source grid operation mode, perform reactive power optimization and power flow calculation on each partition within the time and space range to perform reactive power balance adjustment;

[0009] The operation modes corresponding to all partitions are spliced ​​together to obtain the operation mode of the entire network.

[0010] Preferably, the determining of a source grid operation mode that matches the production simulation scenario includes:

[0011] The same study year, study grid area and grid operation mode of the planning scheme as the production simulation scenario are selected to determine the source grid operation mode that matches the production simulation scenario.

[0012] Preferably, the method distributes power in the following manner, including:

[0013] For conventional energy units, the unit output is determined based on the results of the time-series production simulation, and the remaining operating status information uses the unit information corresponding to the source grid operation mode;

[0014] For small power units that are not modeled, the unit output is recorded in the form of negative load and deducted from the partition load;

[0015] For new energy units, the switching status of the corresponding new energy units is determined according to the scene information, and the output size is obtained from the partitioned new energy output curve.

[0016] Preferably, the method performs calculation load distribution in the following manner, including:

[0017] The following methods are used to conduct network loss statistics on historical power grid operation mode data, including:

[0018]

[0019] The partition load results of the production simulation calculation are corrected using the following methods, including:

[0020]

[0021] Statistics on plant power load include: obtaining from the source grid operation mode first, and then using preset typical values;

[0022] The following methods are used to distribute the calculated load of the plant and station, including:

[0023]

[0024] Among them, P zone_load_t represents the total load of the partition at time t derived from the production simulation results, P′ zone_load_t P represents the total amount of calculated load to be allocated after correction to the grid operation mode at time t. zone_load_gen_t Represents the total power load of the sub-area plant at time t, P zone_loss Represents the partition network loss rate, P zone_gen Represents the total output of the partition power supply, P zone_section Represents the power injected into the partition of the cross section, P zone_load Represents the total amount of partition computing load, P zone_load_gen Represents the total power load of the sub-district plant; independent variable It represents the ratio of the total load to be distributed in the partition at time t to the total load in the partition of the source grid operation mode, P m Indicates the maximum bus load value determined by the transformer equipment capacity, P b It represents the calculated bus load corresponding to the source grid operation mode, and K represents the load linear change range.

[0025] Preferably, the method performs cross-section power allocation in the following manner, including:

[0026] For DC sections, power curves or energy curves were matched one by one before production simulation calculations. During mode calculations, the DC switching state and transmission power were obtained from the production simulation calculation program. Other operating mode information was first obtained from the source grid operating mode, and then set according to preset typical values.

[0027] For AC sections, the power of the internal AC lines is not controlled during production simulation calculations; when performing mode calculations, the power of the AC lines within the study area is also not controlled, and the power distribution of the external sections is preferentially read from the production simulation results; if this information is not available, the boundary line injection power is obtained from the source mode and then distributed proportionally; if this information is not available, the distribution is based on the proportion of the line current carrying capacity.

[0028] According to another aspect of the present invention, a system for constructing a power grid operation mode based on a unified planning platform is provided, the system comprising:

[0029] A source grid operation mode determination unit, used to determine a source grid operation mode that matches a production simulation scenario;

[0030] A distribution unit is used to obtain the grid topology of the source grid operation mode, perform production simulation calculations, and perform power distribution, load distribution and section power distribution according to the calculation results of the time-series production simulation at each moment to achieve active power balance;

[0031] A reactive power balance adjustment unit is configured to determine the time and space range of the operation mode based on the operation mode of the source power grid, and perform reactive power optimization and power flow calculation on each partition within the time and space range to perform reactive power balance adjustment;

[0032] The operation mode splicing unit is used to splice the operation modes corresponding to all partitions to obtain the operation mode of the entire network.

[0033] Preferably, the source grid operation mode determining unit determines the source grid operation mode that matches the production simulation scenario, including:

[0034] The same study year, study grid area and grid operation mode of the planning scheme as the production simulation scenario are selected to determine the source grid operation mode that matches the production simulation scenario.

[0035] Preferably, the distribution unit distributes power in the following manner, including:

[0036] For conventional energy units, the unit output is determined based on the results of the time-series production simulation, and the remaining operating status information follows the unit information corresponding to the source grid operation mode. If the unit is not powered on in the source grid operation mode, it will automatically power on and set the node type to PV, set the voltage level to 1 pu, and automatically open the step-up transformer and inter-station line.

[0037] For small power units that are not modeled, the unit output is recorded in the form of negative load and deducted from the partition load;

[0038] For new energy units, the switching status of the corresponding new energy units is determined according to the scenario information, and the output size is obtained from the partitioned new energy output curve; among them, if the unit is not turned on in the source grid operation mode, it will be automatically turned on and the node type will be set to PQ, the reactive output will be arranged to 0, and the step-up transformer and inter-station lines will be automatically opened.

[0039] Preferably, the distribution unit distributes the computational load in the following manner, including:

[0040] The following methods are used to conduct network loss statistics on historical power grid operation mode data, including:

[0041]

[0042] The partition load results of the production simulation calculation are corrected using the following methods, including:

[0043]

[0044] Statistics on plant power load include: obtaining from the source grid operation mode first, and then using preset typical values;

[0045] The following methods are used to distribute the calculated load of the plant and station, including:

[0046]

[0047] Among them, P zone_load_t represents the total load of the partition at time t derived from the production simulation results, P z ' one_load_t P represents the total amount of calculated load to be allocated after correction to the grid operation mode at time t. zone_load_gen_t Represents the total power load of the sub-area plant at time t, P zone_loss Represents the partition network loss rate, P zone_gen Represents the total output of the partition power supply, P zone_section Represents the power injected into the partition of the cross section, P zone_load Represents the total amount of partition computing load, P zone_load_gen Represents the total power load of the sub-district plant; independent variable It represents the ratio of the total load to be distributed in the partition at time t to the total load in the partition of the source grid operation mode, P m Indicates the maximum bus load value determined by the transformer equipment capacity, P b It represents the calculated bus load corresponding to the source grid operation mode, and K represents the load linear change range.

[0048] Preferably, the distribution unit performs cross-section power distribution in the following manner, including:

[0049] For DC sections, power curves or energy curves were matched one by one before production simulation calculations. During mode calculations, the DC switching state and transmission power were obtained from the production simulation calculation program. Other operating mode information was first obtained from the source grid operating mode, and then set according to preset typical values.

[0050] For AC sections, the power of the internal AC lines is not controlled during production simulation calculations; when performing mode calculations, the power of the AC lines within the study area is also not controlled, and the power distribution of the external sections is preferentially read from the production simulation results; if this information is not available, the boundary line injection power is obtained from the source mode and then distributed proportionally; if this information is not available, the distribution is based on the proportion of the line current carrying capacity.

[0051] The present invention provides a method and system for constructing a power grid operation mode based on a unified planning platform, including: determining a source power grid operation mode that matches a production simulation scenario; obtaining the power grid topology of the source power grid operation mode, and performing production simulation calculations, and performing power distribution, load distribution calculations, and cross-section power distribution based on the moment-by-moment calculation results of the sequential production simulation to achieve active power balance; determining the spatiotemporal range of the operation mode based on the source power grid operation mode, performing reactive power optimization and flow calculations on each partition within the spatiotemporal range to adjust reactive power balance; splicing the operation modes corresponding to all partitions to obtain the operation mode of the entire network. The method of the present invention is based on the data structure defined by the unified planning platform, and utilizes the moment-by-moment startup schedule information, partition load information, and cross-section power information in the sequential production simulation results to quickly form a power grid operation mode and perform automatic adjustments to a certain extent, which can greatly improve the efficiency of compiling the operation mode. BRIEF DESCRIPTION OF THE DRAWINGS

[0052] A more complete understanding of exemplary embodiments of the present invention may be obtained by referring to the following drawings:

[0053] Figure 1 Flowchart of a method 100 for constructing a power grid operation mode based on a unified planning platform according to an embodiment of the present invention;

[0054] Figure 2 A schematic diagram of an automatic generation model of a power grid operation mode according to an embodiment of the present invention;

[0055] Figure 3 Schematic diagram of the structure of a system 300 for constructing a power grid operation mode based on a unified planning platform according to an embodiment of the present invention. DETAILED DESCRIPTION

[0056] Exemplary embodiments of the present invention will now be described with reference to the accompanying drawings. However, the present invention may be embodied in many different forms and is not limited to the embodiments described herein. These embodiments are provided to provide a thorough and complete disclosure of the present invention and to fully convey the scope of the present invention to those skilled in the art. The terminology used in the exemplary embodiments shown in the accompanying drawings is not intended to limit the present invention. In the accompanying drawings, identical elements are denoted by the same reference numerals.

[0057] Unless otherwise specified, the terms used herein (including technical terms) have the meanings commonly understood by those skilled in the art. In addition, it is understood that terms defined in commonly used dictionaries should be understood to have the same meanings as those in the context of the relevant fields, and should not be understood as idealized or overly formal meanings.

[0058] Figure 1FIG. 1 is a flow chart of a method 100 for constructing a power grid operation mode based on a unified planning platform according to an embodiment of the present invention. Figure 1 As shown, the method for constructing a power grid operation mode based on a unified planning platform provided by the embodiment of the present invention is based on the data structure defined by the unified planning platform, and utilizes the moment-by-moment startup schedule information, partition load information, and section power information in the time-series production simulation results to quickly form a power grid operation mode and perform automatic adjustments to a certain extent, which can greatly improve the efficiency of compiling the operation mode. Figure 1 As shown, the method 100 for constructing a power grid operation mode based on a unified planning platform provided by an embodiment of the present invention starts from step 101. In step 101, a source power grid operation mode matching a production simulation scenario is determined.

[0059] Preferably, the determining of a source grid operation mode that matches the production simulation scenario includes:

[0060] The same study year, study grid area and grid operation mode of the planning scheme as the production simulation scenario are selected to determine the source grid operation mode that matches the production simulation scenario.

[0061] Under a certain grid structure, the time-series production simulation program can generate moment-by-moment startup arrangements based on the initial grid structure and various unit commissioning plans, maintenance plans, new energy output forecasts and load forecast data, which serve as active power planning data for the grid operation mode.

[0062] The present invention adopts "computational scenarios" to describe the production simulation calculation examples. Based on the unified planning platform, the grid operation mode with the same research year, research grid area and planning scheme is selected, which is called the source mode. The grid topology is obtained and the production simulation calculation is performed, and the calculation results of the production simulation are stored back on this grid topology. Since the grid operation mode and the production simulation calculation scenario are both for the equipment in the same database, it can solve the problem that the DC network and the historical AC network are difficult to fully match in the existing technical solutions. Automatically generate models such as Figure 2 shown.

[0063] In step 102, the grid topology of the source grid operation mode is obtained, and production simulation calculations are performed, and power distribution, load distribution and section power distribution are performed according to the calculation results of the time series production simulation at each moment to achieve active power balance.

[0064] Preferably, the method distributes power in the following manner, including:

[0065] For conventional energy units, the unit output is determined based on the results of the time-series production simulation, and the remaining operating status information uses the unit information corresponding to the source grid operation mode;

[0066] For small power units that are not modeled, the unit output is recorded in the form of negative load and deducted from the partition load;

[0067] For new energy units, the switching status of the corresponding new energy units is determined according to the scene information, and the output size is obtained from the partitioned new energy output curve.

[0068] Preferably, the method performs calculation load distribution in the following manner, including:

[0069] The following methods are used to conduct network loss statistics on historical power grid operation mode data, including:

[0070]

[0071] The partition load results of the production simulation calculation are corrected using the following methods, including:

[0072]

[0073] Statistics on plant power load include: obtaining from the source grid operation mode first, and then using preset typical values;

[0074] The following methods are used to distribute the calculated load of the plant and station, including:

[0075]

[0076] Among them, P zone_load_t represents the total load of the partition at time t derived from the production simulation results, P z ' one_load_t P represents the total amount of calculated load to be allocated after correction to the grid operation mode at time t. zone_load_gen_t Represents the total power load of the sub-area plant at time t, P zone_loss Represents the partition network loss rate, P zone_gen Represents the total output of the partition power supply, P zone_section Represents the power injected into the partition of the cross section, P zone_load Represents the total amount of partition computing load, P zone_load_gen Represents the total power load of the sub-district plant; independent variable It represents the ratio of the total load to be distributed in the partition at time t to the total load in the partition of the source grid operation mode, P m Indicates the maximum bus load value determined by the transformer equipment capacity, P b It represents the calculated bus load corresponding to the source grid operation mode, and K represents the load linear change range.

[0077] In the present invention, the calculation load distribution includes the following aspects:

[0078] 1. Network loss statistics

[0079] The network loss value is strongly correlated with the research grid area. Considering that the grid operation mode is generally based on the provincial grid as the smallest unit, the present invention adopts formula (1) to calculate the network loss of each provincial grid operation mode under large / medium / small load levels using the statistical method of the national grid dispatching department:

[0080]

[0081] Among them, P zone_loss Represents the partition network loss rate (statistical value), P zone_gen Represents the total output of the partition power supply, P zone_section Represents the power injected into the partition of the cross section (including AC and DC), P zone_load Represents the total amount of partition computing load, P zone_load_gen Represents the total power load of the sub-zone plant.

[0082] 2. Partition load correction

[0083] The power supply startup information obtained from the production simulation results is relatively accurate, but the load in the results only matches the DC power flow calculation. If it is directly applied to the AC power flow, it can be considered that the DC load results pre-consider the factory power consumption and network losses, and are therefore biased high. In addition, the production simulation calculation results provide the total load of each partition, and a method for calculating the load distribution method is required. The present invention uses formula (2) to correct the partition load results of the production simulation calculation:

[0084]

[0085] Among them, P zone_load_t represents the total load of the partition at time t derived from the production simulation results, P′ zone_load_t P represents the total amount of calculated load to be allocated after correction to the grid operation mode at time t. zone_load_gen_t Represents the total power load of the sub-area plant at time t, P zone_loss Represents the partition network loss rate.

[0086] 3. Factory power load statistics

[0087] The plant power load involved in formula (2) needs to be calculated according to the grid area defined by the calculation partition, and the units with large consumption, such as thermal power and nuclear power, need to be counted. The method adopted by the present invention is: first obtain it from the source mode. If the source mode lacks relevant information, the reserved typical value is used.

[0088] 4. Calculation of plant load

[0089] When the unified planning platform equipment is modeled, only the load under a certain bus is described. The load size, power factor and other information are described in detail in the operation mode information. In order to obtain the distribution result of the calculated load of the plant station, the method adopted by the present invention is to determine the maximum value P of the bus mode load one by one according to the transformer capacity. m , combined with the above common practices to draw a single point load change curve (similar to the magnetic saturation curve), within a certain range (K·P m , K∈[0,1]) changes linearly, and grows slowly beyond this range and does not return beyond P m , using hyperbolic function fitting, see formula (3):

[0090]

[0091] The independent variable P represents the ratio of the total load to be distributed in the partition at time t to the total load in the source mode partition. m Indicates the maximum bus load value determined by the transformer equipment capacity, P b Indicates the calculated bus load corresponding to the source mode, and K indicates the load linear change range.

[0092] Preferably, the method performs cross-section power allocation in the following manner, including:

[0093] For DC sections, power curves or energy curves were matched one by one before production simulation calculations. During mode calculations, the DC switching state and transmission power were obtained from the production simulation calculation program. Other operating mode information was first obtained from the source grid operating mode, and then set according to preset typical values.

[0094] For AC sections, the power of the internal AC lines is not controlled during production simulation calculations; when performing mode calculations, the power of the AC lines within the study area is also not controlled, and the power distribution of the external sections is preferentially read from the production simulation results; if this information is not available, the boundary line injection power is obtained from the source mode and then distributed proportionally; if this information is not available, the distribution is based on the proportion of the line current carrying capacity.

[0095] In this invention, cross-section power allocation is handled separately for AC and DC sections. On the unified planning platform, DC sections correspond one-to-one with DC equipment, and power curves or energy curves (PSCH / ESCH curves) are matched one-to-one before production simulation calculations. When performing mode calculations, the DC switching state and transmission power should be obtained from the production simulation calculation program. Other operating mode information, including trigger angle, turn-off angle, etc., is preferentially obtained from the source mode, and also has preset typical values.

[0096] Before performing a production simulation calculation, the unified planning platform defines a partitioned AC section, which may include one or more AC lines. Production simulation calculations generally do not control the power of the AC line, and the result obtained is also a natural flow distribution. When performing mode calculations, the power of the AC lines within the study area is also not controlled, but the power injected into the boundary line (the busbar on one side of the line is outside the study area) should be used as the initial condition. It should be noted that the production simulation calculation partition and the study grid area of ​​the operation mode are inclusive. The section between the calculation partition and the external partition can be considered as the boundary line, and the production simulation calculation results need to be read and distributed. Power distribution also takes the priority of obtaining from the source and then distributing it proportionally. If this information is not available, the distribution is based on the proportion of the line current carrying capacity.

[0097] In step 103, the time and space range of the operation mode is determined based on the operation mode of the source power grid, and reactive power optimization and power flow calculation are performed on each partition within the time and space range to perform reactive power balance adjustment.

[0098] In step 104, the operation modes corresponding to all partitions are combined to obtain the operation mode of the entire network.

[0099] In the present invention, according to steps 101-102, the active power of the operational scenario is essentially balanced. However, due to the lack of reactive power balance considerations in the production simulation calculations, it remains difficult to obtain a convergent and representative power flow state for the large power grid that conforms to actual operating conditions. In particular, when the source mode load level differs significantly from the current mode load level, the source mode reactive power equipment arrangement must be adjusted in batches to meet voltage amplitude and power transmission requirements.

[0100] In actual projects, large power grids are typically broken down into multiple subgrids based on the jurisdiction of various control centers. After the subgrid flows converge, they are reassembled to form a full-grid operating mode. This "divide and conquer" approach can also be efficiently implemented using a unified planning platform. The platform has established a connection between the equipment's subordinate grid area and the production simulation calculation partitions. When forming the grid operation mode, the temporal and spatial scope of the operation mode is determined based on the scenario-related base state operation mode (also known as the source mode). If the source mode includes multiple calculation partitions, the grid area covered by each partition is used as the effective grid range for the generated mode, and reactive power adjustment is then performed.

[0101] The specific process of determining the operating mode of the present invention is as follows:

[0102] 1) Specify the source grid operation mode for the production simulation scenario, requiring that the two research years are the same and the effective research grid area of ​​the source mode covers the production simulation scenario;

[0103] 2) Based on the moment-by-moment calculation results of the time-series production simulation, complete power distribution, load distribution, and cross-section power distribution;

[0104] 3) Perform reactive power optimization and power flow calculation. If convergence is achieved, proceed to reactive power optimization of the next partition.

[0105] 4) After the reactive power optimization of all partitions is completed, they are spliced ​​into the full network operation mode.

[0106] The present invention proposes an operating mode generation and automatic adjustment method based on production simulation results. It utilizes the source, grid, load and storage data and simulation scenario information modeled on a unified planning platform to efficiently and automatically form a moment-by-moment grid operating mode. Compared with the typical operating mode based solely on expert experience, it is more adaptable to the development needs of new power systems.

[0107] Figure 3 FIG. 3 is a schematic diagram of a system 300 for constructing a power grid operation mode based on a unified planning platform according to an embodiment of the present invention. Figure 3 As shown, the grid operation mode construction system 300 based on the unified planning platform provided by the embodiment of the present invention includes: a source grid operation mode determination unit 301, a distribution unit 302, a reactive power balance adjustment unit 303 and an operation mode splicing unit 304.

[0108] Preferably, the source grid operation mode determining unit 301 is used to determine a source grid operation mode that matches the production simulation scenario.

[0109] Preferably, the source grid operation mode determining unit 301 determines the source grid operation mode that matches the production simulation scenario, including:

[0110] The same study year, study grid area and grid operation mode of the planning scheme as the production simulation scenario are selected to determine the source grid operation mode that matches the production simulation scenario.

[0111] Preferably, the distribution unit 302 is used to obtain the grid topology of the source grid operation mode, and perform production simulation calculations, and perform power distribution, calculated load distribution and section power distribution according to the calculation results of the time-series production simulation at each moment to achieve active power balance.

[0112] Preferably, the distribution unit 302 distributes power in the following manner, including:

[0113] For conventional energy units, the unit output is determined based on the results of the time-series production simulation, and the remaining operating status information uses the unit information corresponding to the source grid operation mode;

[0114] For small power units that are not modeled, the unit output is recorded in the form of negative load and deducted from the partition load;

[0115] For new energy units, the switching status of the corresponding new energy units is determined according to the scene information, and the output size is obtained from the partitioned new energy output curve.

[0116] Preferably, the distribution unit 302 distributes the computing load in the following manner, including:

[0117] The following methods are used to conduct network loss statistics on historical power grid operation mode data, including:

[0118]

[0119] The partition load results of the production simulation calculation are corrected using the following methods, including:

[0120]

[0121] Statistics on plant power load include: obtaining from the source grid operation mode first, and then using preset typical values;

[0122] The following methods are used to distribute the calculated load of the plant and station, including:

[0123]

[0124] Among them, P zone_load_t represents the total load of the partition at time t derived from the production simulation results, P′ zone_load_t P represents the total amount of calculated load to be allocated after correction to the grid operation mode at time t. zone_load_gen_t Represents the total power load of the sub-area plant at time t, P zone_loss Represents the partition network loss rate, P zone_gen Represents the total output of the partition power supply, P zone_section Represents the power injected into the partition of the cross section, P zone_load Represents the total amount of partition computing load, P zone_load_gen Represents the total power load of the sub-district plant; independent variable It represents the ratio of the total load to be distributed in the partition at time t to the total load in the partition of the source grid operation mode, P m Indicates the maximum bus load value determined by the transformer equipment capacity, P b It represents the calculated bus load corresponding to the source grid operation mode, and K represents the load linear change range.

[0125] Preferably, the distribution unit 302 performs cross-section power distribution in the following manner, including:

[0126] For DC sections, power curves or energy curves were matched one by one before production simulation calculations. During mode calculations, the DC switching state and transmission power were obtained from the production simulation calculation program. Other operating mode information was first obtained from the source grid operating mode, and then set according to preset typical values.

[0127] For AC sections, the power of the internal AC lines is not controlled during production simulation calculations; when performing mode calculations, the power of the AC lines within the study area is also not controlled, and the power distribution of the external sections is preferentially read from the production simulation results; if this information is not available, the boundary line injection power is obtained from the source mode and then distributed proportionally; if this information is not available, the distribution is based on the proportion of the line current carrying capacity.

[0128] Preferably, the reactive balance adjustment unit 303 is used to determine the time and space range of the operation mode based on the source grid operation mode, and perform reactive optimization and power flow calculation on each partition within the time and space range to perform reactive balance adjustment.

[0129] Preferably, the operation mode splicing unit 304 is used to splice the operation modes corresponding to all partitions to obtain the operation mode of the entire network.

[0130] The grid operation mode construction system 300 based on a unified planning platform of an embodiment of the present invention corresponds to the grid operation mode construction method 100 based on a unified planning platform of another embodiment of the present invention, and will not be described in detail here.

[0131] The present invention has been described with reference to a few embodiments. However, it is apparent to those skilled in the art that other embodiments than the ones disclosed above are equally within the scope of the present invention.

[0132] Generally, all terms used in this disclosure are to be interpreted according to their ordinary meaning in the art, unless explicitly defined otherwise herein. All references to "a / the / the [device, component, etc.]" are to be interpreted openly as referring to at least one instance of the device, component, etc., unless explicitly stated otherwise. The steps of any method disclosed herein do not necessarily need to be performed in the exact order disclosed, unless explicitly stated otherwise.

[0133] Those skilled in the art will appreciate that the embodiments of the present application can be provided as methods, systems, or computer program products. Therefore, the present application can adopt the form of a complete hardware embodiment, a complete software embodiment, or an embodiment in combination with software and hardware. Moreover, the present application can adopt the form of a computer program product implemented on one or more computer-usable storage media (including but not limited to magnetic disk storage, CD-ROM, optical storage, etc.) that contain computer-usable program code.

[0134] The present application is described with reference to the flowcharts and / or block diagrams of the methods, devices (systems), and computer program products according to the embodiments of the present application. It should be understood that each process and / or box in the flowchart and / or block diagram, as well as the combination of the processes and / or boxes in the flowchart and / or block diagram, can be implemented by computer program instructions. These computer program instructions can be provided to a processor of a general-purpose computer, a special-purpose computer, an embedded processor, or other programmable data processing device to produce a machine, so that the instructions executed by the processor of the computer or other programmable data processing device generate instructions for implementing the steps in the process. Figure 1 a process or multiple processes and / or boxes Figure 1 A device that provides the functions specified in a block or multiple blocks.

[0135] These computer program instructions may also be stored in a computer readable memory that can direct a computer or other programmable data processing device to work in a specific manner, so that the instructions stored in the computer readable memory produce an article of manufacture comprising an instruction device, which implements the process Figure 1 a process or multiple processes and / or boxes Figure 1 The function specified in one or more boxes.

[0136] These computer program instructions can also be loaded onto a computer or other programmable data processing device so that a series of operational steps are executed on the computer or other programmable device to produce a computer-implemented process, thereby providing the instructions executed on the computer or other programmable device for implementing the process. Figure 1 a process or multiple processes and / or boxes Figure 1 A step that specifies a function in one or more boxes.

[0137] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and not to limit it. Although the present invention has been described in detail with reference to the above embodiments, ordinary technicians in the field should understand that the specific implementation methods of the present invention can still be modified or replaced by equivalents. Any modification or equivalent replacement that does not depart from the spirit and scope of the present invention should be covered by the scope of protection of the present invention.

Claims

1. A method for constructing a power grid operation mode based on a unified planning platform, characterized in that: The method comprises: Determine the source grid operation mode that matches the production simulation scenario; Obtaining the grid topology of the source grid operation mode, performing production simulation calculations, and performing power distribution, load distribution, and section power distribution based on the moment-by-moment calculation results of the time-series production simulation to achieve active power balance; Determine the time and space range of the operation mode based on the source grid operation mode, perform reactive power optimization and power flow calculation on each partition within the time and space range to perform reactive power balance adjustment; Combine the operation modes corresponding to all partitions to obtain the operation mode of the entire network; The method calculates load distribution in the following manner, including: The following methods are used to conduct network loss statistics on historical power grid operation mode data, including: The partition load results of the production simulation calculation are corrected using the following methods, including: Statistics on plant power load include: obtaining from the source grid operation mode first, and then using preset typical values; The following methods are used to distribute the calculated load of the plant and station, including: Among them, P zone_load_t represents the total load of the partition at time t derived from the production simulation results, P′ zone_load_t P represents the total amount of calculated load to be allocated after correction to the grid operation mode at time t. zone_load_gen_t Represents the total power load of the sub-area plant at time t, P zone_loss Represents the partition network loss rate, P zone_gen Represents the total output of the partition power supply, P zone_section Represents the power injected into the partition of the cross section, P zone_load Represents the total amount of partition computing load, P zone_load_gen Represents the total power load of the sub-district plant; independent variable It represents the ratio of the total load to be distributed in the partition at time t to the total load in the partition of the source grid operation mode, P m Indicates the maximum bus load value determined by the transformer equipment capacity, P b It represents the calculated bus load corresponding to the source grid operation mode, and K represents the load linear change range.

2. The method according to claim 1, characterized in that Determining the source grid operation mode that matches the production simulation scenario includes: The grid operation mode of the same study year, study grid area, and planning scheme as the production simulation scenario is selected to determine the source grid operation mode that matches the production simulation scenario.

3. The method according to claim 1, characterized in that The method distributes power using the following method, including: For conventional energy units, the unit output is determined based on the results of the time-series production simulation, and the remaining operating status information uses the unit information corresponding to the source grid operation mode; For small power units that are not modeled, the unit output is recorded in the form of negative load and deducted from the partition load; For new energy units, the switching status of the corresponding new energy units is determined according to the scene information, and the output size is obtained from the partitioned new energy output curve.

4. The method according to claim 1, wherein The method performs cross-section power distribution in the following manner, including: For DC sections, power curves or energy curves were matched one by one before production simulation calculations. During mode calculations, the DC switching state and transmission power were obtained from the production simulation calculation program. Other operating mode information was first obtained from the source grid operating mode, and then set according to preset typical values. For AC sections, the power of the internal AC lines is not controlled during production simulation calculations; when performing mode calculations, the power of the AC lines within the study area is also not controlled, and the power distribution of the external sections is preferentially read from the production simulation results; if this information is not available, the boundary line injection power is obtained from the source mode and then distributed proportionally; if this information is not available, the distribution is based on the proportion of the line current carrying capacity.

5. A power grid operation mode construction system based on a unified planning platform, characterized in that: The system comprises: A source grid operation mode determination unit, used to determine a source grid operation mode that matches a production simulation scenario; A distribution unit is used to obtain the grid topology of the source grid operation mode, perform production simulation calculations, and perform power distribution, load distribution and section power distribution according to the calculation results of the time-series production simulation at each moment to achieve active power balance; A reactive power balance adjustment unit is configured to determine the time and space range of the operation mode based on the operation mode of the source power grid, and perform reactive power optimization and power flow calculation on each partition within the time and space range to perform reactive power balance adjustment; The operation mode splicing unit is used to splice the operation modes corresponding to all partitions to obtain the operation mode of the entire network; The distribution unit distributes the computing load in the following manner, including: The following methods are used to conduct network loss statistics on historical power grid operation mode data, including: The partition load results of the production simulation calculation are corrected using the following methods, including: Statistics on plant power load include: obtaining it from the source grid operation mode first, and then using preset typical values; The following methods are used to distribute the calculated load of the plant and station, including: Among them, P zone_load_t represents the total load of the partition at time t derived from the production simulation results, P′ zone_load_t P represents the total amount of calculated load to be allocated after correction to the grid operation mode at time t. zone_load_gen_t Represents the total power load of the sub-area plant at time t, P zone_loss Represents the partition network loss rate, P zone_gen Represents the total output of the partition power supply, P zone_section Represents the power injected into the partition of the cross section, P zone_load Represents the total amount of partition computing load, P zone_load_gen Represents the total power load of the sub-district plant; independent variable It represents the ratio of the total load to be distributed in the partition at time t to the total load in the partition of the source grid operation mode, P m Indicates the maximum bus load value determined by the transformer equipment capacity, P b It represents the calculated bus load corresponding to the source grid operation mode, and K represents the load linear change range.

6. The system according to claim 5, characterized in that The source grid operation mode determining unit determines a source grid operation mode that matches the production simulation scenario, including: The grid operation mode of the same study year, study grid area, and planning scheme as the production simulation scenario is selected to determine the source grid operation mode that matches the production simulation scenario.

7. The system according to claim 5, characterized in that The distribution unit distributes power using the following methods, including: For conventional energy units, the unit output is determined based on the results of the time-series production simulation, and the remaining operating status information uses the unit information corresponding to the source grid operation mode; For small power units that are not modeled, the unit output is recorded as a negative load and deducted from the partition load; For new energy units, the switching status of the corresponding new energy units is determined according to the scene information, and the output size is obtained from the partitioned new energy output curve.

8. The system according to claim 5, wherein: The distribution unit performs cross-sectional power distribution in the following manner, including: For DC sections, power curves or energy curves were matched one by one before production simulation calculations. During mode calculations, the DC switching state and transmission power were obtained from the production simulation calculation program. Other operating mode information was first obtained from the source grid operating mode, and then set according to preset typical values. For AC sections, the power of the internal AC lines is not controlled during production simulation calculations; when performing mode calculations, the power of the AC lines within the study area is also not controlled, and the power distribution of the external sections is preferentially read from the production simulation results; if this information is not available, the boundary line injection power is obtained from the source mode and then distributed proportionally; if this information is not available, the distribution is based on the proportion of the line current carrying capacity.

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