Large-scale power grid power flow mode intelligent adjustment method considering new energy output change

Abstract

The invention discloses a large-scale power grid power flow mode intelligent adjustment method considering new energy output change, and the method comprises the steps: respectively calculating the total power unbalance amount in a partition caused by wind power / photovoltaic coincidence rate change, load level change and generator set starting-up combination change; the total power unbalance amount in the partition comprises the total active unbalance amount in the partition and the total reactive unbalance amount in the partition; performing active power balance adjustment step by step according to the total active power unbalance in the subareas and according to the multi-spatial scale sequence of the subareas, the areas and the electrical islands; reactive power balance adjustment is carried out in each partition according to the total reactive power unbalance amount in the partitions and the principle of proximity compensation; and adjusting the current operation mode to the target operation mode based on the adjustment results of the active power balance adjustment and the reactive power balance adjustment.

Description

Technical Field

[0001] This invention relates to the field of power system simulation technology, and more specifically, to a method for intelligent adjustment of large-scale power grid power flow patterns that takes into account changes in the output of new energy sources. Background Technology

[0002] With the rapid development and significant expansion of my country's power grid construction, the safety and stability characteristics and mechanisms of the power grid are becoming increasingly complex, and the difficulty of power grid operation and control is also constantly increasing. The amount of calculation and workload required for power grid operation mode analysis and adjustment is also showing a large-scale growth trend. The large-scale integration of new energy sources such as wind power and photovoltaics has also led to a gradual increase in the uncertainty of operation modes, thus requiring more detailed adjustments. When adjusting power flow modes, in addition to considering changes in load levels, conventional unit start-up combinations, and boundary conditions, it is also necessary to consider changes in the output of new energy sources.

[0003] Traditional power grid operation mode analysis methods and techniques currently rely mainly on the operation mode compilers at various levels of control centers within the power grid. They use simulation analysis software as an auxiliary tool, combined with load forecasting results, historical operation mode data, and human experience, and refer to power flow and stability calculation results to compile operation modes. The above methods are currently facing the following problems: (1) The scope and scale of the analysis are limited, and the comprehensiveness is insufficient. With the large-scale integration of new energy sources, the operation mode of the power grid is becoming more complex and variable. Power flow mode adjustments need to cover multiple operation scenarios and simulate various operating conditions. Manual adjustments are not comprehensive enough, making it difficult to understand safety boundaries and discover safety hazards. (2) Manual compilation is inefficient and has limited precision. Traditional analysis methods rely on the experience of staff and their understanding of power grid characteristics to adjust parameters in complex power grids. The workload is large, repetitive, and the analysis efficiency is low. Moreover, the comprehensiveness and precision of the analysis results are limited, thus limiting the scale of new energy grid connection and restricting the flexibility and economy of power grid operation.

[0004] At present, there have been many studies on power flow mode adjustment methods based on artificial intelligence technology. Reference [1] uses graph convolution forward propagation strategy and adversarial process design operation mode adjustment strategy to achieve efficient and intelligent adjustment of operation mode that does not meet static N-1 security check. Reference [2] uses knowledge base logical reasoning method to simulate mode personnel to arrange power flow mode and develops intelligent regional power grid operation mode arrangement decision support system. Reference [3] uses cluster analysis method to extract feature variables that characterize the power grid operation state and proposes a refined management method for power grid operation mode. Reference [4] uses DC power flow model to study active power flow adjustment and reactive power flow adjustment methods, and applies reactive power automatic adjustment program to reactive power arrangement of operation mode based on PSDB. Reference [5] constructs operation mode adjustment model with power flow state of power grid operation mode as the main body and safety, stability and economic characteristics as constraints, and lays out intelligent adjustment algorithm of power grid operation mode based on deep reinforcement learning method. The above studies have laid the foundation for the research on artificial intelligence generation method of power flow mode of large power grid under conventional operation mode scenario. However, there are no reports yet on how to take into account the changes in power flow patterns caused by the integration of new energy sources, and how to generate power flow patterns that balance the output and load levels and start-up methods of new energy sources.

[0005] In view of the problems and shortcomings of traditional operation mode adjustment methods, such as difficulty in fully considering the impact of new energy access on the power grid, low adjustment efficiency, and large workload, there is an urgent need to innovate adjustment methods and explore more efficient, precise, and intelligent operation mode adjustment methods, so as to further improve the understanding and analysis of the power grid. Summary of the Invention

[0006] To address the shortcomings of existing technologies, this invention provides a method for intelligent adjustment of large-scale power grid power flow patterns that takes into account changes in renewable energy output.

[0007] According to one aspect of the present invention, a method for intelligent adjustment of power flow patterns in large-scale power grids considering changes in renewable energy output is provided, comprising:

[0008] Calculate the total power imbalance within the zone caused by changes in the simultaneity rate of wind power / solar power, changes in load level, and changes in generator unit start-up combination. The total power imbalance within the zone includes the total active power imbalance and the total reactive power imbalance within the zone.

[0009] Based on the total active power imbalance within the zone, active power balance adjustments are carried out step by step in the order of multi-spatial scales: zone, area, and electrical island.

[0010] Based on the total reactive power imbalance within each zone, reactive power balance adjustments are made within each zone according to the principle of nearest compensation.

[0011] Based on the adjustment results of active power balance adjustment and reactive power balance adjustment, the current operating mode is adjusted to the target operating mode.

[0012] Optionally, the power imbalance caused by changes in the simultaneity rate of wind power / solar power is calculated, including:

[0013] Calculate the adjusted target power for wind and solar power based on the set wind / solar simultaneity rate and the rated power of the units;

[0014] The deviation between the target power of wind power / solar power and the current power before adjustment is calculated to obtain the first active power imbalance.

[0015] The first reactive power imbalance is estimated based on the active power imbalance and the power factor.

[0016] Optionally, the power imbalance caused by changes in load level is calculated, including:

[0017] Calculate the target power of the changed load based on the set load change ratio factor;

[0018] The deviation between the target load power and the load power before the change is calculated to obtain the second active power imbalance and the second reactive power imbalance.

[0019] Optionally, the second active power imbalance ΔP Load Second reactive power imbalance ΔQ Load The calculation expression is:

[0020] ΔP Load =P Load,target -P Load,current

[0021] ΔQ Load =Q Load,target -Q Load,current

[0022] in,

[0023] P Load,target =P Load,current ×R Load

[0024] Q Load,target =Q Load,current ×R Load

[0025] In the formula, P Load,current To change the active power of the load, Q Load,current To change the reactive power of the preload, R Load P is the load change proportional factor. Load,target Q Load,target These are the target power for active load and the target power for reactive load, respectively.

[0026] Optionally, the power imbalance caused by changes in the generator set start-up configuration is calculated, including:

[0027] Based on the lists of units that must be started and units that must be stopped, calculate the power increase of units that must be started and the power decrease of units that must be stopped.

[0028] The third active power imbalance and the third reactive power imbalance are obtained by algebraically summing the power increase and power decrease, respectively.

[0029] Optionally, the total active power imbalance ΔP within the partition zone and the total reactive power imbalance ΔQ within the zone zone The calculation expression is:

[0030] ΔP zone =ΔP NEV,zone +ΔP Gen,zone -ΔP Load,zone

[0031] ΔQ zone =ΔQ NEV，zone +ΔQ Gen，zone -ΔQ Load，zone

[0032] In the formula, ΔP NEV,zone The first active power imbalance within the partition; ΔP Gen，zone The second active power imbalance within the partition; ΔP Load,zone The third active power imbalance within the partition; ΔQ NEV,zone The first reactive power imbalance within the partition; ΔQ Gen,zone The second reactive power imbalance within the partition; ΔQ Load,zone It is the third reactive power imbalance within the partition.

[0033] Optionally, based on the total active power imbalance within the zone, active power balance adjustments are performed step-by-step according to the multi-spatial scale sequence of zone, area, and electrical island, including:

[0034] Step 1: Calculate the total active power imbalance in each zone, find the adjustable generator sets in the zone, match the adjustable capacity of the generator sets with the active power imbalance, and adjust the start-up and shutdown status or active power output of the matched generator sets until the total active power imbalance in the zone meets the threshold condition or there are no adjustable generator sets in the zone.

[0035] Step 2: If the total active power imbalance in the partition does not meet the threshold condition after adjustment in Step 1, then proceed to the regional scale adjustment; summarize the active power imbalance of each partition in the region to obtain the total active power imbalance of the region, find adjustable generator sets in the region and perform matching adjustment until the total active power imbalance in the region meets the threshold condition or there are no adjustable generator sets in the region.

[0036] Step 3: If the total active power imbalance in the region does not meet the threshold condition after adjustment in Step 2, then proceed to the electrical island scale adjustment; summarize the active power imbalance of each region or zone in the electrical island, find the adjustable generator set in the electrical island and perform matching adjustment until the total active power imbalance in the electrical island meets the threshold condition.

[0037] Optionally, the matching rule for matching the adjustable capacity of the generator set with the active power imbalance is as follows: the generator set with the smallest absolute value of the difference between the adjustable capacity and the active power imbalance is selected as the generator set to participate in the adjustment; the generator selection rules are as follows:

[0038]

[0039] Among them, DP G,AQ DP G,Inc DP G,Rec These are the absolute values ​​of the difference between the generator's adjustable capacity and the total active power imbalance within the zone.

[0040] Optionally, based on the total reactive power imbalance within each zone, and following the principle of nearest-neighbor compensation, reactive power balance adjustments are made within each zone, including:

[0041] Calculate the total reactive power imbalance within each zone;

[0042] If the reactive power imbalance is greater than zero, then in this zone, the capacitors that have been put into operation and / or the reactors that have been put into operation will be put into operation first.

[0043] If the reactive power imbalance is less than zero, then in this zone, the reactors that have been put into operation and / or the capacitors that have been put into operation will be put into operation first.

[0044] Through the above operations, the total reactive power imbalance within the zone is eliminated or the reactive power compensation equipment capacity limit is reached.

[0045] According to another aspect of the present invention, a large-scale power grid power flow mode intelligent adjustment device considering changes in new energy output is provided, comprising:

[0046] The calculation module is used to calculate the total power imbalance within the zone caused by changes in the simultaneity rate of wind power / solar power, changes in load level, and changes in the generator set start-up combination. The total power imbalance within the zone includes the total active power imbalance and the total reactive power imbalance within the zone.

[0047] The first adjustment module is used to adjust the active power balance step by step according to the total active power imbalance in the zone, in the order of multi-spatial scales of zone, area, and electrical island.

[0048] The second adjustment module is used to adjust the reactive power balance in each zone according to the principle of nearest compensation based on the total reactive power imbalance in the zone.

[0049] The third adjustment module is used to adjust the current operating mode to the target operating mode based on the adjustment results of active power balance adjustment and reactive power balance adjustment.

[0050] Optionally, the calculation module calculates the power imbalance caused by changes in the simultaneity rate of wind power / solar power, including:

[0051] Calculate the adjusted target power for wind and solar power based on the set wind / solar simultaneity rate and the rated power of the units;

[0052] The deviation between the target power of wind power / solar power and the current power before adjustment is calculated to obtain the first active power imbalance.

[0053] The first reactive power imbalance is estimated based on the active power imbalance and the power factor.

[0054] Optionally, the calculation module calculates the power imbalance caused by changes in load level, including:

[0055] Calculate the target power of the changed load based on the set load change ratio factor;

[0056] The deviation between the target load power and the load power before the change is calculated to obtain the second active power imbalance and the second reactive power imbalance.

[0057] Optionally, the second active power imbalance ΔP Load Second reactive power imbalance ΔQ Load The calculation expression is:

[0058] ΔP Load =P Load,target -P Load,current

[0059] ΔQ Load =Q Load,target -Q Load,current

[0060] in,

[0061] P Load,target =P Load,current ×R Load

[0062] Q Load,target =Q Load,current ×R Load

[0063] In the formula, P Load,current To change the active power of the load, Q Load,currentTo change the reactive power of the preload, R Load P is the load change proportional factor. Load,target Q Load,target These are the target power for active load and the target power for reactive load, respectively.

[0064] Optionally, the calculation module calculates the power imbalance caused by changes in the generator set's starting configuration, including:

[0065] Based on the lists of units that must be started and units that must be stopped, calculate the power increase of units that must be started and the power decrease of units that must be stopped.

[0066] The third active power imbalance and the third reactive power imbalance are obtained by algebraically summing the power increase and power decrease, respectively.

[0067] Optionally, the total active power imbalance ΔP within the partition zone and the total reactive power imbalance ΔQ within the zone zone The calculation expression is:

[0068] ΔP zone =ΔP NEV,zone +ΔP Gen,zone -ΔP Load,zone

[0069] ΔQ zone =ΔQ NEV,zone +ΔQ Gen,zone -ΔQ Load,zone

[0070] In the formula, ΔP NEV,zone The first active power imbalance within the partition; ΔP Gen,zone The second active power imbalance within the partition; ΔP Load,zone The third active power imbalance within the partition; ΔQ NEV,zone The first reactive power imbalance within the partition; ΔQ Gen,zone The second reactive power imbalance within the partition; ΔQ Load,zone It is the third reactive power imbalance within the partition.

[0071] Optionally, the first adjustment module includes:

[0072] Step 1: Calculate the total active power imbalance in each zone, find the adjustable generator sets in the zone, match the adjustable capacity of the generator sets with the active power imbalance, and adjust the start-up and shutdown status or active power output of the matched generator sets until the total active power imbalance in the zone meets the threshold condition or there are no adjustable generator sets in the zone.

[0073] Step 2: If the total active power imbalance in the partition does not meet the threshold condition after adjustment in Step 1, then proceed to the regional scale adjustment; summarize the active power imbalance of each partition in the region to obtain the total active power imbalance of the region, find adjustable generator sets in the region and perform matching adjustment until the total active power imbalance in the region meets the threshold condition or there are no adjustable generator sets in the region.

[0074] Step 3: If the total active power imbalance in the region does not meet the threshold condition after adjustment in Step 2, then proceed to the electrical island scale adjustment; summarize the active power imbalance of each region or zone in the electrical island, find the adjustable generator set in the electrical island and perform matching adjustment until the total active power imbalance in the electrical island meets the threshold condition.

[0075] Optionally, the matching rule for matching the adjustable capacity of the generator set with the active power imbalance is as follows: the generator set with the smallest absolute value of the difference between the adjustable capacity and the active power imbalance is selected as the generator set to participate in the adjustment; the generator selection rules are as follows:

[0076]

[0077] Among them, DP G,AQ DP G,Inc DP G,Rec These are the absolute values ​​of the difference between the generator's adjustable capacity and the total active power imbalance within the zone.

[0078] Optionally, the second adjustment module includes:

[0079] Calculate the total reactive power imbalance within each zone;

[0080] If the reactive power imbalance is greater than zero, then in this zone, the capacitors that have been put into operation and / or the reactors that have been put into operation will be put into operation first.

[0081] If the reactive power imbalance is less than zero, then in this zone, the reactors that have been put into operation and / or the capacitors that have been put into operation will be put into operation first.

[0082] Through the above operations, the total reactive power imbalance within the zone is eliminated or the reactive power compensation equipment capacity limit is reached.

[0083] According to another aspect of the present invention, a computer-readable storage medium is provided, the storage medium storing a computer program for performing the methods described in any of the above aspects of the present invention.

[0084] According to another aspect of the present invention, an electronic device is provided, the electronic device comprising: a processor; a memory for storing executable instructions of the processor; the processor being configured to read the executable instructions from the memory and execute the instructions to implement the method described in any of the preceding aspects of the present invention.

[0085] Therefore, this invention simultaneously considers the changes in operating mode caused by variations in wind / solar simulcast rates, load levels, and generator unit start-up combinations, adjusting the current operating mode to the target operating mode. For active power imbalances caused by these mode changes, active power balance adjustments are made at multiple spatial scales, including zones, regions, and electrical islands. For reactive power imbalances caused by these mode changes, reactive power balance adjustments are made according to zones based on the principle of proximity compensation, greatly improving the work efficiency of power grid simulation analysts. Attached Figure Description

[0086] Exemplary embodiments of the present invention can be more fully understood by referring to the following figures:

[0087] Figure 1 This is a flowchart illustrating an exemplary embodiment of the present invention of a method for intelligent adjustment of large-scale power grid flow patterns that takes into account changes in renewable energy output.

[0088] Figure 2 This is another flowchart illustrating an exemplary embodiment of the present invention for a method of intelligent adjustment of large-scale power grid flow patterns that takes into account changes in the output of new energy sources;

[0089] Figure 3 This is a schematic diagram of the structure of a large-scale power grid power flow intelligent adjustment device that takes into account changes in the output of new energy sources, provided in an exemplary embodiment of the present invention;

[0090] Figure 4 This is the structure of an electronic device provided in an exemplary embodiment of the present invention. Detailed Implementation

[0091] Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings. It is obvious that the described embodiments are merely some embodiments of the present invention, and not all embodiments of the present invention, and it should be understood that the present invention is not limited to the exemplary embodiments described herein.

[0092] It should be noted that, unless otherwise specifically stated, the relative arrangement, numerical expressions, and values ​​of the components and steps described in these embodiments do not limit the scope of the invention.

[0093] Those skilled in the art will understand that the terms "first," "second," etc., in the embodiments of the present invention are only used to distinguish different steps, devices, or modules, and do not represent any specific technical meaning, nor do they indicate a necessary logical order between them.

[0094] It should also be understood that in the embodiments of the present invention, "multiple" can refer to two or more, and "at least one" can refer to one, two or more.

[0095] It should also be understood that any component, data or structure mentioned in the embodiments of the present invention can generally be understood as one or more unless explicitly defined or given contrary instructions in the context.

[0096] Furthermore, the term "and / or" in this invention is merely a description of the relationship between related objects, indicating that three relationships can exist. For example, A and / or B can represent: A existing alone, A and B existing simultaneously, or B existing alone. Additionally, the character " / " in this invention generally indicates that the preceding and following related objects have an "or" relationship.

[0097] It should also be understood that the description of the various embodiments in this invention emphasizes the differences between the various embodiments, and the similarities or similarities can be referred to each other. For the sake of brevity, they will not be described in detail.

[0098] At the same time, it should be understood that, for ease of description, the dimensions of the various parts shown in the accompanying drawings are not drawn according to actual scale.

[0099] The following description of at least one exemplary embodiment is merely illustrative and is in no way intended to limit the invention or its application or use.

[0100] Techniques, methods, and equipment known to those skilled in the art may not be discussed in detail, but where appropriate, they should be considered part of the specification.

[0101] It should be noted that similar labels and letters in the following figures indicate similar items; therefore, once an item is defined in one figure, it does not need to be discussed further in subsequent figures.

[0102] The embodiments of this invention can be applied to electronic devices such as terminal devices, computer systems, and servers, and can operate together with a wide range of other general-purpose or special-purpose computing system environments or configurations. Well-known examples of terminal devices, computing systems, environments, and / or configurations suitable for use with electronic devices such as terminal devices, computer systems, and servers include, but are not limited to: personal computer systems, server computer systems, thin clients, thick clients, handheld or laptop devices, microprocessor-based systems, set-top boxes, programmable consumer electronics, network PCs, minicomputer systems, mainframe computer systems, and distributed cloud computing environments including any of the above systems, etc.

[0103] Electronic devices such as terminal devices, computer systems, and servers can be described in the general context of computer system executable instructions (such as program modules) executed by a computer system. Typically, program modules can include routines, programs, object programs, components, logic, data structures, etc., which perform specific tasks or implement specific abstract data types. Computer systems / servers can be implemented in distributed cloud computing environments, where tasks are executed by remote processing devices linked through communication networks. In distributed cloud computing environments, program modules can reside on local or remote computing system storage media, including storage devices.

[0104] Exemplary methods

[0105] Figure 1 This is a flowchart illustrating a large-scale power flow intelligent adjustment method for power grids that considers changes in renewable energy output, provided by an exemplary embodiment of the present invention. This embodiment can be applied to electronic devices, such as… Figure 1 As shown, the intelligent adjustment method 100 for large-scale power grid power flow considering changes in renewable energy output includes the following steps:

[0106] Step 101: Calculate the total power imbalance within the zone caused by changes in the simultaneity rate of wind power / photovoltaic power, changes in load level, and changes in generator unit start-up combination. The total power imbalance within the zone includes the total active power imbalance and the total reactive power imbalance within the zone.

[0107] Step 102: Based on the total active power imbalance within the zone, the active power balance is adjusted step by step according to the multi-spatial scale sequence of zone, area, and electrical island.

[0108] Step 103: Based on the total reactive power imbalance within each zone, and following the principle of nearest compensation, adjust the reactive power balance within each zone.

[0109] Step 104: Based on the adjustment results of active power balance adjustment and reactive power balance adjustment, adjust the current operating mode to the target operating mode.

[0110] Specifically, the purpose of this invention is to address the complex and ever-changing power flow patterns caused by variations in renewable energy output, which necessitate considering numerous operating conditions when adjusting power flow patterns. This invention proposes a large-scale intelligent power flow pattern adjustment method that takes into account changes in renewable energy output. This method can simultaneously consider changes in power flow patterns caused by variations in wind / PV simultaneity rates, load levels, and generator unit start-up combinations, adjusting the current operating mode to the target operating mode. For active power imbalances caused by mode changes, active power balance adjustments are performed at multiple spatial scales, including zones, regions, and electrical islands. For reactive power imbalances caused by mode changes, reactive power balance adjustments are performed at the zone level based on the principle of proximity compensation. The method includes: calculating the power imbalances caused by variations in wind / PV simultaneity rates, load levels, and generator unit start-up combinations; performing active power balance adjustments at multiple spatial scales, including zones, regions, and electrical islands, for active power imbalances caused by mode changes; performing reactive power balance adjustments at the zone level based on the principle of proximity compensation for reactive power imbalances caused by mode changes; and finally adjusting the current operating mode to the target operating mode. The changes in the simultaneity rate of wind power / solar power, the changes in load level, and the changes in the generator unit start-up combination are the targets for power flow adjustment. The intelligent power balance adjustment method that takes into account the changes in the output of new energy sources is the core content.

[0111] As a further aspect of the present invention: the calculation of the power imbalance caused by the change in the simultaneity rate of wind power / solar power refers to the deviation between the adjusted target power of wind power / solar power and the current power of wind power / solar power before adjustment, calculated based on the set simultaneity rate. (Reference) Figure 2 As shown, the specific calculation formula is as follows:

[0112] 1) The adjusted target power for wind / solar power is:

[0113] P NEV,target =P NEV,rate ×R NEV

[0114] Among them, P NEV,rate R is the rated power of the wind / solar power unit. NEV The simultaneity rate is set for wind power / solar power, which is determined by the method calculation personnel based on adjustment requirements.

[0115] 2) The active power imbalance caused by the change in the simultaneity rate of wind power / solar power is:

[0116] ΔP NEV =P NEV,target -P NEV,current

[0117] Among them, P NEV,current To adjust the current power output of wind / solar power before adjustment.

[0118] The reactive power imbalance is estimated based on the active power imbalance, and the calculation formula is as follows:

[0119] ΔQ NEV =ΔP NEV ×0.1

[0120] The power imbalance caused by load level changes refers to the deviation between the load power after the change and the load power before the change, calculated by setting a load change ratio factor based on load forecast results or adjustment methods. The specific calculation formula is as follows:

[0121] 1) The target power of the load after the change is:

[0122] P Load,target =P Load,current ×R Load

[0123] Q Load,target =Q Load,current ×R Load

[0124] Among them, P Load,current To change the active power of the load, Q Load,current To change the reactive power of the preload, R Load This is the load change ratio factor.

[0125] 2) The power imbalance caused by changes in load level is:

[0126] ΔP Load =P Load,target -P Load,current

[0127] ΔQ Load =Q Load,target -Q Load,current

[0128] The calculation of power imbalance caused by changes in generator set start-up combinations refers to calculating the difference between the changes in start-up and stop-up amounts before and after adjustment, based on the mandatory start-up and mandatory stop-up units. The specific calculation formula is as follows:

[0129] ΔP Gen =P Gen,open -P Gen,close

[0130] ΔQ Gen =Q Gen,open -Q Gen,close

[0131] P Gen,open The formula for calculating the change in active power before and after adjustment of the generator unit is as follows:

[0132]

[0133] P Gen,close The formula for calculating the change in active power before and after adjustment of the unit that must be shut down is as follows:

[0134]

[0135] Among them, P Gi For the active power output of the generator, N G,open and N G,close This refers to the number of units that must be started and the number of units that must be stopped.

[0136] Q Gen,open The formula for calculating the change in active power before and after adjustment of the generator unit is as follows:

[0137]

[0138] Q Gen,close The formula for calculating the change in active power before and after adjustment of the unit that must be shut down is as follows:

[0139]

[0140] Among them, Q Gi This is for the reactive power output of the generator.

[0141] The active power imbalance caused by the change in the method refers to the active power imbalance caused by changes in the simultaneity rate of wind power / solar power, changes in load level, and changes in generator unit operating combinations, statistically analyzed by region to obtain the total active power imbalance within each region. The calculation formula is as follows:

[0142] ΔP zone =ΔP NEV,zone +ΔP Gen,zone -ΔP Load,zone

[0143] The aforementioned multi-spatial-scale active power balance adjustment at the zoning, regional, and electrical island scales refers to:

[0144] First, active power balancing is performed by zone. The total active power imbalance within each zone is calculated, and the adjustable generators within that zone are located. The adjustable capacity of the generators is matched with the active power imbalance, and the matched adjustable generators are selected for adjustment. Active power balancing at the zone level is achieved by modifying the generator's activation / deactivation flags and active power output. The specific process is as follows:

[0145] 1) Calculate the total active power imbalance ΔP within each zone. zone .

[0146] 2) Determine ΔP zone Size: If ΔP zoneA value greater than 0 indicates that the active power generated in this zone exceeds the active power generated by the load, thus requiring a reduction in the active power output of conventional units within this zone to achieve balance; if ΔP zone <0 indicates that the active power generated in this zone is less than the active power generated by the load, and it is necessary to increase the active power output of the conventional units in this zone to balance the load.

[0147] 3) According to ΔP zone To find the size of the adjustable unit in this partition: if ΔP zone If the value is greater than 0, then find the generator sets within that partition that can have their output reduced or can be taken out of operation, i.e., those that meet the following conditions:

[0148]

[0149] If ΔP zone＜0 Then, find the generator sets within that partition that can have their output increased or can be put into operation, i.e., those that meet the following conditions:

[0150]

[0151] 4) Matching based on generator set adjustable capacity and active power imbalance: Calculate the absolute value of the difference between the generator set adjustable capacity and the total active power imbalance within the zone, and select the generator set with the smallest absolute value as the generator to participate in the adjustment. The generator selection rules are as follows:

[0152]

[0153] Among them, DP G,AQ DP G,Inc DP G,Rec These are the absolute values ​​of the difference between the generator's adjustable capacity and the total active power imbalance within the zone.

[0154] 5) If the selected generator is an operational generator, modify the generator activation / deactivation flag IVaild = 1; if the selected generator is an operational generator that can be deactivated, modify the generator activation / deactivation flag IVaild = 0; if the selected generator is a generator whose output can be increased, modify the generator active power output P. G =P G,max If the selected generator is a generator with reduced output, then modify the generator's active power output P. G =P G,min .

[0155] Update the total active power imbalance within the partition:

[0156]

[0157] 6) Determine if the total active power imbalance within the partition meets the threshold condition. If it does, it means the total active power imbalance within the partition is sufficiently small, and the active power of the partition is balanced, so the partition active power balance adjustment ends; if it does not meet the threshold, it means the total active power imbalance within the partition is still relatively large, and the partition active power is unbalanced, so proceed to step 2) to continue the partition active power balance adjustment. The threshold condition is as follows:

[0158] |ΔP zone |≤ε

[0159] Typically, ε is taken as 10MW, or the capacity of the largest generator.

[0160] After performing active power balancing by zone, if there are no adjustable generators in a zone and the total active power imbalance in the zone does not meet the threshold condition, then regional active power balance adjustment is performed. The specific process is as follows:

[0161] 1) Based on the total active power imbalance ΔP within the zone zone Total active power imbalance ΔP within the calculation area area .

[0162] ΔP area =∑ΔP zone,i

[0163] Where, ΔP zone,i This represents the total active power imbalance of partition i belonging to this region.

[0164] 2) Determine ΔP area Size: If ΔP area >0 indicates that power generation in the region exceeds load, requiring a reduction in the output of conventional generating units in the region to balance the load; if ΔP area <0 indicates that the power generation in the area is less than the load, and it is necessary to increase the output of conventional units in the area to balance the load.

[0165] 3) According to ΔP area The system searches for adjustable generator units in the region based on their size, matches them with the adjustable capacity of the generator units to the active power imbalance, modifies the generator's activation / deactivation flags and active power output, and determines whether the total active power imbalance in the region meets the threshold condition. This process is similar to the regional active power balancing process and will not be described in detail here.

[0166] After performing regional active power balancing, if there are no adjustable generators in the region and the total active power imbalance within the zone does not meet the threshold condition |ΔP area If |≤ε, then the active power balance adjustment of the electrical island is performed. The specific process is similar to that of zone and area active power balance: calculate the total active power imbalance ΔP within the electrical island. island According to ΔP islandThe size of the adjustable units within the electrical island is located and adjusted. Through adjustments at different spatial scales—zoning, area, and electrical island—a refined active power balance is achieved.

[0167] The reactive power imbalance caused by the change in the method refers to the reactive power imbalance caused by changes in the simultaneity rate of wind power / solar power, changes in load level, and changes in generator unit operating combinations, statistically analyzed by region to obtain the total reactive power imbalance within each region. The calculation formula is as follows:

[0168] ΔQ zone =ΔQ NEV,zone +ΔQ Gen,zone -ΔQ Load,zone

[0169] The principle of proximity compensation and reactive power balance adjustment by zone refers to locating adjustable reactive power compensation equipment within the zone and switching it on or off according to the magnitude of reactive power imbalance to achieve reactive power balance. If ΔQ zone If ΔQ > 0, it indicates that the reactive power generated in this zone is greater than the reactive power of the load. Therefore, it is necessary to remove the capacitors already in operation in this zone and reconnect the reactors already removed from operation in this zone until the reactive power compensation equipment capacity can offset the reactive power imbalance. If ΔQ zone If the value is less than 0, it means that the reactive power generated in this zone is less than the reactive power of the load. In this case, the reactors already in operation in this zone need to be removed and the capacitors already removed in this zone need to be put back in, until the capacity of the reactive power compensation equipment can offset the reactive power imbalance.

[0170] In a specific embodiment of the present invention, the effectiveness of the method is verified by using the adjustment effect of the Northwest Power Grid data 32444 node system.

[0171] The simultaneous rate settings for new energy sources are shown in Table 1:

[0172] Table 1 Simultaneous Rate Setting of New Energy

[0173]

[0174] The load level settings are shown in Table 2:

[0175] Table 2 Load Level Settings

[0176]

[0177] The start / stop combination settings are shown in Table 3:

[0178] Table 3 Start-up and Shutdown Combination Settings

[0179]

[0180] The steps for adjusting the power flow pattern using this patented method are as follows:

[0181] (1) First, based on the changes in the simultaneity rate of new energy sources, the changes in load levels, and the start-up combinations, calculate the active power imbalance and reactive power imbalance of each zone, as shown in Table 4:

[0182] Table 4 Power Imbalance in Each Zone

[0183]

[0184] (2) Active power balance adjustment is carried out according to multiple spatial scales such as zoning, area, and electrical island. The adjustment scheme is as follows:

[0185] Table 5 Generator Adjustment Scheme (Partial)

[0186]

[0187] (3) Based on the principle of nearest compensation, reactive power balance adjustment shall be carried out according to the zones, and the adjustment plan is as follows:

[0188] Table 6 Reactive Power Compensation Adjustment Plan

[0189]

[0190]

[0191] After adjustments, the power flow methods all achieved the set targets, verifying the correctness and effectiveness of the method. The entire adjustment process took 26 seconds, greatly improving the work efficiency of simulation analysts. The results after adjustment are as follows:

[0192] Table 7 Results of Adjustment for Simultaneous Renewable Energy Rate

[0193]

[0194] Table 8 Load Level Adjustment Results

[0195]

[0196] Table 9 Results of Start-up and Shutdown Combination Adjustments

[0197]

[0198] This method has been applied to the power flow mode intelligent adjustment module of the power system simulation program PSASP. It has been verified using multiple power grid examples of different scales and regions. The adjustment success rate has reached over 90%, and the adjustment time is less than 5 minutes, which greatly improves the work efficiency of power grid simulation analysts.

[0199] Therefore, this invention simultaneously considers the changes in operating mode caused by variations in wind / solar simulcast rates, load levels, and generator unit start-up combinations, adjusting the current operating mode to the target operating mode. For active power imbalances caused by these mode changes, active power balance adjustments are made at multiple spatial scales, including zones, regions, and electrical islands. For reactive power imbalances caused by these mode changes, reactive power balance adjustments are made according to zones based on the principle of proximity compensation, greatly improving the work efficiency of power grid simulation analysts.

[0200] Exemplary device

[0201] Figure 3 This is a schematic diagram of the structure of a large-scale power grid power flow intelligent adjustment device that takes into account changes in new energy output, provided by an exemplary embodiment of the present invention. Figure 3 As shown, the device 300 includes:

[0202] Calculation module 310 is used to calculate the total power imbalance within a zone caused by changes in the simultaneity rate of wind power / photovoltaic power, changes in load level, and changes in generator unit start-up combination. The total power imbalance within a zone includes the total active power imbalance and the total reactive power imbalance within a zone.

[0203] The first adjustment module 320 is used to adjust the active power balance step by step according to the total active power imbalance in the zone, in the order of multi-spatial scales of zone, area, and electrical island.

[0204] The second adjustment module 330 is used to adjust the reactive power balance in each zone according to the principle of nearest compensation based on the total reactive power imbalance in the zone.

[0205] The third adjustment module 340 is used to adjust the current operating mode to the target operating mode based on the adjustment results of active power balance adjustment and reactive power balance adjustment.

[0206] Optionally, the calculation module 310 calculates the power imbalance caused by changes in the simultaneity rate of wind power / solar power, including:

[0207] Calculate the adjusted target power for wind and solar power based on the set wind / solar simultaneity rate and the rated power of the units;

[0208] The deviation between the target power of wind power / solar power and the current power before adjustment is calculated to obtain the first active power imbalance.

[0209] The first reactive power imbalance is estimated based on the active power imbalance and the power factor.

[0210] Optionally, the calculation module 310 calculates the power imbalance caused by changes in load level, including:

[0211] Calculate the target power of the changed load based on the set load change ratio factor;

[0212] The deviation between the target load power and the load power before the change is calculated to obtain the second active power imbalance and the second reactive power imbalance.

[0213] Optionally, the second active power imbalance ΔP Load Second reactive power imbalance ΔP Load The calculation expression is:

[0214] ΔP Load =P Load，target -P Load，current

[0215] ΔQ Load =Q Load，target -Q Load，current

[0216] in,

[0217] P Load，target =P Load，current ×R Load

[0218] Q Load，target =Q Load，current ×R Load

[0219] In the formula, P Load，current To change the active power of the load, Q Load，current To change the reactive power of the preload, R Load P is the load change proportional factor. Load，target Q Load,target These are the target power for active load and the target power for reactive load, respectively.

[0220] Optionally, the calculation module 310 calculates the power imbalance caused by changes in the generator set's start-up configuration, including:

[0221] Based on the lists of units that must be started and units that must be stopped, calculate the power increase of units that must be started and the power decrease of units that must be stopped.

[0222] The third active power imbalance and the third reactive power imbalance are obtained by algebraically summing the power increase and power decrease, respectively.

[0223] Optionally, the total active power imbalance ΔP within the partition zone and the total reactive power imbalance ΔQ within the zone zone The calculation expression is:

[0224] ΔP zone =ΔP NEV，zone +ΔP Gen，zone-ΔP Load，zone

[0225] ΔQ zone =ΔQ NEV，zone +ΔQ Gen，zone -ΔQ Load，zone

[0226] In the formula, ΔP NEV，zone The first active power imbalance within the partition; ΔP Gen，zone The second active power imbalance within the partition; ΔP Load，zone The third active power imbalance within the partition; ΔQ NEV,zone The first reactive power imbalance within the partition; ΔQ Gen,zone The second reactive power imbalance within the partition; ΔQ Load,zone It is the third reactive power imbalance within the partition.

[0227] Optionally, the first adjustment module 320 includes:

[0228] Step 1: Calculate the total active power imbalance in each zone, find the adjustable generator sets in the zone, match the adjustable capacity of the generator sets with the active power imbalance, and adjust the start-up and shutdown status or active power output of the matched generator sets until the total active power imbalance in the zone meets the threshold condition or there are no adjustable generator sets in the zone.

[0229] Step 2: If the total active power imbalance in the partition does not meet the threshold condition after adjustment in Step 1, then proceed to the regional scale adjustment; summarize the active power imbalance of each partition in the region to obtain the total active power imbalance of the region, find adjustable generator sets in the region and perform matching adjustment until the total active power imbalance in the region meets the threshold condition or there are no adjustable generator sets in the region.

[0230] Step 3: If the total active power imbalance in the region does not meet the threshold condition after adjustment in Step 2, then proceed to the electrical island scale adjustment; summarize the active power imbalance of each region or zone in the electrical island, find the adjustable generator set in the electrical island and perform matching adjustment until the total active power imbalance in the electrical island meets the threshold condition.

[0231] Optionally, the matching rule for matching the adjustable capacity of the generator set with the active power imbalance is as follows: the generator set with the smallest absolute value of the difference between the adjustable capacity and the active power imbalance is selected as the generator set to participate in the adjustment; the generator selection rules are as follows:

[0232]

[0233] Among them, DP G,AQ DP G,Inc DP G,Rec These are the absolute values ​​of the difference between the generator's adjustable capacity and the total active power imbalance within the zone.

[0234] Optionally, the second adjustment module 330 includes:

[0235] Calculate the total reactive power imbalance within each zone;

[0236] If the reactive power imbalance is greater than zero, then in this zone, the capacitors that have been put into operation and / or the reactors that have been put into operation will be put into operation first.

[0237] If the reactive power imbalance is less than zero, then in this zone, the reactors that have been put into operation and / or the capacitors that have been put into operation will be put into operation first.

[0238] Through the above operations, the total reactive power imbalance within the zone is eliminated or the reactive power compensation equipment capacity limit is reached.

[0239] Exemplary electronic devices

[0240] Figure 4 This is the structure of an electronic device provided in an exemplary embodiment of the present invention. For example... Figure 4 As shown, the electronic device 40 includes one or more processors 41 and a memory 42.

[0241] The processor 41 may be a central processing unit (CPU) or other form of processing unit with data processing and / or instruction execution capabilities, and may control other components in the electronic device to perform desired functions.

[0242] The memory 42 may include one or more computer program products, which may include various forms of computer-readable storage media, such as volatile memory and / or non-volatile memory. The volatile memory may include, for example, random access memory (RAM) and / or cache memory. The non-volatile memory may include, for example, read-only memory (ROM), hard disk, flash memory, etc. One or more computer program instructions may be stored on the computer-readable storage medium, and the processor 41 may execute the program instructions to implement the methods of the software programs of the various embodiments of the present invention described above, and / or other desired functions. In one example, the electronic device may also include an input device 43 and an output device 44, these components being interconnected via a bus system and / or other forms of connection mechanisms (not shown).

[0243] In addition, the input device 43 may also include, for example, a keyboard, a mouse, etc.

[0244] The output device 44 can output various information to the outside. The output device 44 may include, for example, a display, a speaker, a printer, and a communication network and its connected remote output devices, etc.

[0245] Of course, for the sake of simplicity, Figure 4 Only some of the components of this electronic device relevant to the present invention are shown, omitting components such as buses, input / output interfaces, etc. In addition, the electronic device may include any other suitable components depending on the specific application.

[0246] Exemplary computer program products and computer-readable storage media

[0247] In addition to the methods and apparatus described above, embodiments of the present invention may also be computer program products, which include computer program instructions that, when executed by a processor, cause the processor to perform the steps of the methods according to various embodiments of the present invention described in the "Exemplary Methods" section above.

[0248] The computer program product can be written in any combination of one or more programming languages ​​to perform the operations of the embodiments of the present invention. The programming languages ​​include object-oriented programming languages ​​such as Java and C++, as well as conventional procedural programming languages ​​such as C or similar languages. The program code can be executed entirely on the user's computing device, partially on the user's computing device, as a standalone software package, partially on the user's computing device and partially on a remote computing device, or entirely on a remote computing device or server.

[0249] Furthermore, embodiments of the present invention may also be computer-readable storage media storing computer program instructions thereon, which, when executed by a processor, cause the processor to perform the steps of the methods according to various embodiments of the present invention described in the "Exemplary Methods" section above.

[0250] The computer-readable storage medium may be any combination of one or more readable media. A readable medium may be a readable signal medium or a readable storage medium. A readable storage medium may be, for example, an electrical, magnetic, optical, electromagnetic, infrared, or semiconductor system, device, or any combination thereof. More specific examples (a non-exhaustive list) of readable storage media include: an electrical connection having one or more wires, a portable disk, a hard disk, random access memory (RAM), read-only memory (ROM), erasable programmable read-only memory (EPROM or flash memory), optical fiber, portable compact disk read-only memory (CD-ROM), optical storage device, magnetic storage device, or any suitable combination thereof.

[0251] The basic principles of the present invention have been described above with reference to specific embodiments. However, it should be noted that the advantages, benefits, and effects mentioned in the present invention are merely examples and not limitations, and should not be considered as essential features of each embodiment of the present invention. Furthermore, the specific details disclosed above are for illustrative and facilitative purposes only, and are not limitations. These details do not limit the present invention to the necessity of employing the aforementioned specific details.

[0252] The various embodiments in this specification are described in a progressive manner, with each embodiment focusing on its differences from other embodiments. Similar or identical parts between embodiments can be referred to interchangeably. For system embodiments, since they largely correspond to method embodiments, the description is relatively simple; relevant parts can be referred to the descriptions in the method embodiments.

[0253] The block diagrams of devices, systems, devices, and systems involved in this invention are merely illustrative examples and are not intended to require or imply that they must be connected, arranged, or configured in the manner shown in the block diagrams. As those skilled in the art will recognize, these devices, systems, devices, and systems can be connected, arranged, and configured in any manner. Words such as “comprising,” “including,” “having,” etc., are open-ended terms meaning “including but not limited to,” and are used interchangeably with them. The terms “or” and “and” as used herein refer to the terms “and / or,” and are used interchangeably with them unless the context clearly indicates otherwise. The term “such as” as used herein refers to the phrase “such as but not limited to,” and is used interchangeably with it.

[0254] The methods and systems of the present invention may be implemented in many ways. For example, they may be implemented by software, hardware, firmware, or any combination of software, hardware, and firmware. The above-described order of steps for the methods is for illustrative purposes only, and the steps of the methods of the present invention are not limited to the order specifically described above unless otherwise specifically stated. Furthermore, in some embodiments, the present invention may also be implemented as a program recorded on a recording medium, the program comprising machine-readable instructions for implementing the methods according to the present invention. Thus, the present invention also covers recording media storing programs for performing the methods according to the present invention.

[0255] It should also be noted that in the systems, apparatus, and methods of the present invention, the components or steps can be disassembled and / or recombined. These disassemblies and / or recombinations should be considered equivalents of the present invention. The above description of the disclosed aspects is provided to enable any person skilled in the art to make or use the invention. Various modifications to these aspects will be readily apparent to those skilled in the art, and the general principles defined herein can be applied to other aspects without departing from the scope of the invention. Therefore, the invention is not intended to be limited to the aspects shown herein, but rather to be carried out within the widest scope consistent with the principles and novel features disclosed herein.

[0256] The above description has been given for purposes of illustration and description. Furthermore, this description is not intended to limit the embodiments of the invention to the forms disclosed herein. Although numerous exemplary aspects and embodiments have been discussed above, those skilled in the art will recognize certain variations, modifications, alterations, additions, and sub-combinations thereof.

Claims

1. A method for intelligent adjustment of power flow patterns in large-scale power grids considering changes in renewable energy output, characterized in that, include: Calculate the total power imbalance within the zone caused by changes in the simultaneity rate of wind power / solar power, changes in load level, and changes in generator unit start-up combination. The total power imbalance within the zone includes the total active power imbalance and the total reactive power imbalance within the zone. Based on the total active power imbalance within the partition, active power balance adjustment is carried out step by step in the order of multi-spatial scales: partition, region, and electrical island. Based on the total reactive power imbalance within the partition, reactive power balance adjustment is carried out within each partition according to the principle of nearest compensation. Based on the adjustment results of the active power balance adjustment and reactive power balance adjustment, the current operating mode is adjusted to the target operating mode.

2. The method according to claim 1, characterized in that, Calculate the power imbalance caused by changes in the simultaneity rate of wind / solar power, including: Calculate the adjusted target power for wind and solar power based on the set wind / solar simultaneity rate and the rated power of the units; The deviation between the target wind / photovoltaic power and the current power before adjustment is calculated to obtain the first active power imbalance. Based on the active power imbalance and power factor, the first reactive power imbalance is estimated.

3. The method according to claim 2, characterized in that, Calculate the power imbalance caused by changes in load level, including: Calculate the target power of the changed load based on the set load change ratio factor; The deviation between the target load power and the load power before the change is calculated to obtain the second active power imbalance and the second reactive power imbalance.

4. The method according to claim 3, characterized in that, The second active power imbalance ΔP Load Second reactive power imbalance ΔQ Load The calculation expression is: ΔP Load =P Load,target -P Load,current ΔQ Load =Q Load,target -Q Load,current in, P Load,target =P Load,current ×R Load Q Load,target =Q Load,current ×R Load In the formula, P Load,current To change the active power of the load, Q Load,current To change the reactive power of the preload, R Load P is the load change proportional factor. Load,target Q Load,target These are the target power for active load and the target power for reactive load, respectively.

5. The method according to claim 3, characterized in that, Calculate the power imbalance caused by changes in generator unit start-up configuration, including: Based on the lists of units that must be started and units that must be stopped, calculate the power increase of units that must be started and the power decrease of units that must be stopped. The power increase and power decrease are algebraically summed to obtain the third active power imbalance and the third reactive power imbalance, respectively.

6. The method according to claim 5, characterized in that, The total active power imbalance ΔP within the partition. zone and the total reactive power imbalance ΔQ within the aforementioned partition zone The calculation expression is: ΔP zone =ΔP NEV,zone +ΔP Gen,zone -ΔP Load,zone ΔQ zone =ΔQ NEV,zone +ΔQ Gen,zone -ΔQ Load,zone In the formula, ΔP NEV,zone The first active power imbalance within the partition; ΔP Gen,zone The second active power imbalance within the partition; ΔP Load,zone The third active power imbalance within the partition; ΔQ NEV,zone The first reactive power imbalance within the partition; ΔQ Gen,zone The second reactive power imbalance within the partition; ΔQ Load,zone It is the third reactive power imbalance within the partition.

7. The method according to claim 1, characterized in that, Based on the total active power imbalance within the aforementioned zone, active power balance adjustments are performed step-by-step according to the multi-spatial scale sequence of zone, region, and electrical island, including: Step 1: Calculate the total active power imbalance in each zone, find the adjustable generator set in the zone, match the adjustable capacity of the generator set with the active power imbalance, and adjust the start-up and shutdown status or active power output of the matched generator set until the total active power imbalance in the zone meets the threshold condition or there is no adjustable generator set in the zone. Step 2: If the total active power imbalance in the partition does not meet the threshold condition after adjustment in Step 1, then proceed to the regional scale adjustment; summarize the active power imbalance of each partition in the region to obtain the total active power imbalance of the region, find adjustable generator sets in the region and perform matching adjustment until the total active power imbalance in the region meets the threshold condition or there are no adjustable generator sets in the region. Step 3: If the total active power imbalance in the region does not meet the threshold condition after adjustment in Step 2, then proceed to the electrical island scale adjustment; summarize the active power imbalance of each region or zone in the electrical island, find the adjustable generator set in the electrical island and perform matching adjustment until the total active power imbalance in the electrical island meets the threshold condition.

8. The method according to claim 7, characterized in that, The matching rule for matching the adjustable capacity of the generator set with the active power imbalance is as follows: the generator set with the smallest absolute value of the difference between the adjustable capacity and the active power imbalance is selected as the generator set to participate in the adjustment; the generator selection rules are as follows: Among them, DP G,AQ DP G,Inc DP G,Rec These are the absolute values ​​of the difference between the generator's adjustable capacity and the total active power imbalance within the zone.

9. The method according to claim 1, characterized in that, Based on the total reactive power imbalance within the aforementioned zones, and following the principle of nearest-neighbor compensation, reactive power balance adjustments are made within each zone, including: Calculate the total reactive power imbalance within each zone; If the reactive power imbalance is greater than zero, then in this zone, the capacitors that have been put into operation and / or the reactors that have been put into operation will be put into operation first. If the reactive power imbalance is less than zero, then in this zone, the reactors that have been put into operation and / or the capacitors that have been put into operation will be put into operation first. Through the above operations, the total reactive power imbalance within the zone is eliminated or the reactive power compensation equipment capacity limit is reached.

10. A large-scale power grid power flow mode intelligent adjustment device considering changes in new energy output, characterized in that, include: The calculation module is used to calculate the total power imbalance within the zone caused by changes in the simultaneity rate of wind power / photovoltaic power, changes in load level, and changes in the generator set start-up combination. The total power imbalance within the zone includes the total active power imbalance and the total reactive power imbalance within the zone. The first adjustment module is used to adjust the active power balance step by step according to the total active power imbalance in the partition, in the order of multi-spatial scale of partition, region and electrical island. The second adjustment module is used to adjust the reactive power balance in each zone according to the principle of nearest compensation based on the total reactive power imbalance in the zone. The third adjustment module is used to adjust the current operating mode to the target operating mode based on the adjustment results of the active power balance adjustment and the reactive power balance adjustment.

11. The apparatus according to claim 1, characterized in that, The calculation module calculates the power imbalance caused by changes in the simultaneity rate of wind and solar power, including: Calculate the adjusted target power for wind and solar power based on the set wind / solar simultaneity rate and the rated power of the units; The deviation between the target wind / photovoltaic power and the current power before adjustment is calculated to obtain the first active power imbalance. Based on the active power imbalance and power factor, the first reactive power imbalance is estimated.

12. The apparatus according to claim 11, characterized in that, The calculation module calculates the power imbalance caused by changes in load level, including: Calculate the target power of the changed load based on the set load change ratio factor; The deviation between the target load power and the load power before the change is calculated to obtain the second active power imbalance and the second reactive power imbalance.

13. A computer-readable storage medium, characterized in that, The storage medium stores a computer program for performing the method described in any one of claims 1-9.

14. An electronic device, characterized in that, The electronic device includes: processor; Memory used to store the processor's executable instructions; The processor is configured to read the executable instructions from the memory and execute the instructions to implement the method described in any one of claims 1-9.

Images