A sensitivity-based method and apparatus for calculating a grid backup blocked capacity

Abstract

The application discloses a kind of based on sensitivity power grid backup blocked capacity calculation method and device, the method is by obtaining real-time power grid model, operation data and stable section to carry out network power flow analysis and calculation, to stable section is overloaded and out-of-limit judgment;For power flow out-of-limit and the stable section of overload, based on the sensitivity information of generator to section, according to sequence multi-round adjustment unit output, until the power flow of power flow out-of-limit and the stable section of overload reaches the steady state limit threshold range;Calculate the power grid backup blocked capacity under current state.The application improves the control center to the degree of control of power grid up and down adjustment capability, to support power grid power balance, accident disposal, equipment overload and the like scene calculation demand.

Description

Technical Field

[0001] This invention belongs to the field of power system dispatch automation technology, specifically relating to a method and device for calculating grid reserve capacity under obstruction based on sensitivity. Background Technology

[0002] With the rapid development of ultra-high voltage AC / DC transmission, the power grid structure is expanding and its operation is becoming increasingly complex. Power flow exceeding limits and overloading of important transmission channels (stable sections) occur frequently, hindering the rapid development of power grid transmission capacity and posing significant risks to the safe and stable operation of the grid. Simultaneously, the rapid penetration of distributed and centralized wind and solar power has led to a "channel competition" between traditional generating units and new energy sources, exacerbating the extent of transmission channel exceeding limits. This highlights the contradiction between the scheduling space of traditional grid regulation resources and the scale of intermittent new energy, resulting in a decline in grid regulation capacity. Control centers need to accurately grasp the grid's upstream and downstream regulation capabilities to support calculations for power generation and consumption balance, accident handling, and equipment overload scenarios. Typically, upstream and downstream regulation capabilities do not consider network security constraints or the limitations of stable section transmission capacity, leading to certain deviations in practical applications. Therefore, a grid reserve capacity obstruction analysis method is needed, considering stable section transmission capacity constraints, statistically analyzing the obstructed capacity of spinning reserve and downstream reserve, supplementing reserve capacity indicators, and supporting the daily operation of dispatching services. Summary of the Invention

[0003] The purpose of this invention is to provide a sensitivity-based method and apparatus for calculating grid reserve capacity under obstruction. Considering the constraints of stable section transmission capacity, the invention statistically analyzes the rotating reserve capacity under obstruction and the lower reserve capacity under obstruction, supplements reserve capacity indicators, and supports the daily operation of dispatching services.

[0004] To achieve the above objectives, the technical solution adopted by the present invention is as follows:

[0005] This invention provides a sensitivity-based method for calculating grid reserve capacity under obstruction, comprising:

[0006] The system acquires real-time power grid models, operational data, and stable sections; performs power flow calculations across the entire network; identifies overload and over-limit conditions on stable sections; and calculates the sensitivity of generator power flow changes to changes in active power on stable sections.

[0007] For the power flow overload stability section and the power flow heavy load stability section, the unit output is adjusted based on the sensitivity of the generator power flow change to the active power change of the stability section, until the power flow overload stability section and the power flow heavy load stability section reach the steady state limit threshold.

[0008] Calculate the grid reserve capacity under the current conditions.

[0009] Furthermore, the determination of overload and limit exceedance of the stable cross section includes:

[0010] If the overload threshold is set to 80%, then when the actual value reaches more than 80% of the set upper limit, it is a power flow overload stability section, and when it reaches more than 100%, it is a power flow over-limit stability section.

[0011] Furthermore, the power flow sensitivity matrix method is used to calculate the sensitivity of generator power flow changes to active power changes at stable cross sections.

[0012] Furthermore, the unit output is adjusted based on the sensitivity of generator power flow changes to active power changes at the stable section when the power flow exceeds the limit, including:

[0013] For power flow exceeding the stability section, the sensitivity of generator power flow changes to active power changes at the stability section is sorted from largest to smallest according to positive and negative directions, forming the first positive sensitivity unit sequence and the first negative sensitivity unit sequence.

[0014] One adjustable unit is selected sequentially from the first positive sensitivity unit sequence and the first negative sensitivity unit sequence. The output of the selected positive sensitivity unit is reduced to the minimum unit output, and the output of the selected negative sensitivity unit is increased to the maximum unit output. Through the combined action of the two units, the downward adjustment amount of the power flow over-limit stability section is calculated.

[0015] The overload and over-limit judgments are performed again, and the unit output is adjusted for the over-limit stable section of the power flow until the power flow of the over-limit stable section is restored to the range of the stable limit threshold value.

[0016] Adjusting unit output based on the sensitivity of generator power flow changes to active power changes at the stable section under heavy load includes:

[0017] For the power flow heavy load stable section, the sensitivity of generator power flow changes to active power changes of the stable section is sorted from small to large according to positive and negative directions respectively, forming a second positive sensitivity unit sequence and a second negative sensitivity unit sequence.

[0018] One adjustable unit is selected sequentially from the second forward sensitivity unit sequence and the second reverse sensitivity unit sequence. The output of the selected forward sensitivity unit is increased to the maximum unit output, and the output of the selected reverse sensitivity unit is decreased to the minimum unit output. Through the combined action of the two units, the upward adjustment of the power flow heavy load stability section is calculated.

[0019] The overload and over-limit judgments are performed again, and the unit output is adjusted for the overloaded stable section until the power flow of the overloaded stable section returns to the stable limit threshold value.

[0020] Furthermore, the grid reserve capacity under disruption includes rotating reserve capacity under disruption and lower reserve capacity under disruption.

[0021] The calculation of the grid reserve capacity under the current state includes:

[0022]

[0023]

[0024] Among them, R 旋转备用受阻 R is the minimum rotating reserve capacity of the power grid under resistance. 下备用受阻 Let S be the minimum standby capacity of the power grid under resistance conditions, and let P be the set of all generating units. i P represents the active power output of unit i in its current state during the iteration process. i max ,P i min These are the maximum and minimum active power outputs of unit i, respectively.

[0025] Furthermore, the power flow method is used to calculate the power flow across the entire network.

[0026] The present invention also provides a sensitivity-based power grid reserve capacity calculation device, comprising:

[0027] The judgment module is used to acquire real-time power grid models, operating data and stable sections, perform power flow calculations across the entire network, judge overload and over-limit conditions of stable sections, and calculate the sensitivity of generator power flow changes to active power changes of stable sections.

[0028] The adjustment module is used to adjust the unit output based on the sensitivity of generator power flow changes to active power changes in the stable section for power flow exceeding limits and power flow under heavy load, until the power flow exceeding limits and power flow under heavy load reach the steady-state limit threshold.

[0029] as well as,

[0030] The calculation module is used to calculate the grid reserve capacity under the current condition.

[0031] Furthermore, the determination module is specifically used for:

[0032] If the overload threshold is set to 80%, then when the actual value reaches more than 80% of the set upper limit, it is a power flow overload stability section, and when it reaches more than 100%, it is a power flow over-limit stability section.

[0033] Furthermore, the adjustment module is specifically used for,

[0034] For power flow exceeding the stability section, the sensitivity of generator power flow changes to active power changes at the stability section is sorted from largest to smallest according to positive and negative directions, forming the first positive sensitivity unit sequence and the first negative sensitivity unit sequence.

[0035] One adjustable unit is selected sequentially from the first positive sensitivity unit sequence and the first negative sensitivity unit sequence. The output of the selected positive sensitivity unit is reduced to the minimum unit output, and the output of the selected negative sensitivity unit is increased to the maximum unit output. Through the combined action of the two units, the downward adjustment amount of the power flow over-limit stability section is calculated.

[0036] The overload and over-limit judgments are performed again, and the unit output is adjusted for the over-limit stable section of the power flow until the power flow of the over-limit stable section is restored to the range of the stable limit threshold value.

[0037] as well as,

[0038] For the power flow heavy load stable section, the sensitivity of generator power flow changes to active power changes of the stable section is sorted from small to large according to positive and negative directions respectively, forming a second positive sensitivity unit sequence and a second negative sensitivity unit sequence.

[0039] One adjustable unit is selected sequentially from the second forward sensitivity unit sequence and the second reverse sensitivity unit sequence. The output of the selected forward sensitivity unit is increased to the maximum unit output, and the output of the selected reverse sensitivity unit is decreased to the minimum unit output. Through the combined action of the two units, the upward adjustment of the power flow heavy load stability section is calculated.

[0040] The overload and over-limit judgments are performed again, and the unit output is adjusted for the overloaded stable section until the power flow of the overloaded stable section returns to the stable limit threshold value.

[0041] Furthermore, the computing module is specifically used for,

[0042] The grid reserve capacity under current conditions is calculated as follows:

[0043]

[0044]

[0045] Among them, R 旋转备用受阻 R is the minimum rotating reserve capacity of the power grid under resistance. 下备用受阻 Let S be the minimum standby capacity of the power grid under resistance conditions, and let P be the set of all generating units. i P represents the active power output of unit i in its current state during the iteration process. i max ,P i minThese are the maximum and minimum active power outputs of unit i, respectively.

[0046] The beneficial effects achieved by this invention are as follows:

[0047] This invention provides a sensitivity-based method for calculating grid reserve capacity under obstruction. Considering the constraints of stable cross-section transmission capacity, it statistically analyzes both rotating reserve capacity under obstruction and downside reserve capacity under obstruction, supplementing reserve capacity indicators and improving the control center's ability to manage grid adjustments. This supports calculation needs in scenarios such as grid power generation and consumption balance, accident handling, and equipment overload. This invention also improves lean management, alleviates the workload of operation personnel, enhances the rationality of grid operation scheduling, and increases work efficiency. Detailed Implementation

[0048] The present invention will now be further described. The following embodiments are only used to more clearly illustrate the technical solution of the present invention, and should not be used to limit the scope of protection of the present invention.

[0049] This invention provides a sensitivity-based method for analyzing grid reserve capacity under obstruction, comprising:

[0050] The system acquires real-time power grid models, operational data, and stability section information. It then performs power flow analysis and calculation across the entire network using conventional AC power flow methods and identifies overloaded and over-limited sections.

[0051] The sensitivity of generator power flow changes to active power changes at stable sections is obtained using the power flow sensitivity matrix method.

[0052] For stable sections under heavy power flow and overload conditions, based on the sensitivity of generator power flow changes to changes in active power of stable sections, the unit output is adjusted in multiple rounds in sequence to calculate the grid reserve capacity under overload and overload conditions of stable sections.

[0053] The backup capacity of the entire network is calculated based on the order of heavy load and over-limit levels of stable cross sections and the setting of heavy load thresholds.

[0054] It should be noted that the stability profile is a collection of several lines and is a key parameter that dispatchers are concerned with. Real-time power grid models, operational data, and stability profile information can all be obtained directly from the Smart Grid Dispatch Technical Support System (D5000 system).

[0055] It should be noted that the overload limit judgment is as follows: if the overload threshold is set to 80%, then the actual value reaching more than 80% of the set upper limit is considered overload, and reaching more than 100% is considered exceeding the limit.

[0056] It should be noted that the restricted reserve capacity refers to the limited generator output caused by the constraint of the stable section's rated capacity, including the restricted rotating reserve capacity and the restricted lower reserve capacity.

[0057] Specifically, the calculation process for the grid reserve capacity under the condition of cross-sectional over-limit obstruction is as follows:

[0058] For stable sections where power flow exceeds the limit, the sensitivity of generator power flow changes to active power changes at the stable section is sorted from largest to smallest in both positive and negative directions to form the first positive sensitivity unit sequence and the first negative sensitivity unit sequence.

[0059] For a stable section where the power flow exceeds the limit, a pair of adjustable units are selected sequentially from the first positive and negative sensitivity unit sequences. The output of the selected positive sensitivity unit is reduced to the minimum unit output, and the output of the selected negative sensitivity unit is increased to the maximum unit output. Through the combined action of the positive and negative units, the downward adjustment of the power flow at the stable section where the power flow exceeds the limit is calculated, thereby mitigating the degree of obstruction at the section.

[0060] The downward adjustment is calculated as: reduced output - increased output.

[0061] The overload and over-limit judgments are performed again, and the unit output is adjusted for the stable section where the power flow exceeds the limit until the power flow of the stable section that exceeds the limit is restored to the range of the stable limit threshold value.

[0062] The current and next standby standby capacities of the unit are calculated as follows:

[0063]

[0064]

[0065] in, These are the first positive and reverse sensitivity unit sequences, P i P represents the active power output of unit i in the current state during the iteration process. i max ,P i min These represent the maximum and minimum unit output of unit i.

[0066] Specifically, the calculation of the grid reserve capacity under heavy load conditions is as follows:

[0067] For stable sections where the power flow reaches the heavy load threshold, the sensitivity of generator power flow changes to changes in active power at the stable section is sorted from smallest to largest according to positive and negative directions, respectively, to form a second positive sensitivity unit sequence and a second negative sensitivity unit sequence.

[0068] For a stable section where the power flow reaches the heavy load threshold, a pair of adjustable units are selected sequentially from the second forward and reverse sensitivity unit sequences. The output of the selected forward sensitivity unit is increased to the maximum unit output, and the output of the selected reverse sensitivity unit is decreased to the minimum unit output. Through the combined action of the forward and reverse units, the upward adjustment of the power flow at the heavy load stable section is calculated. The upward adjustment is calculated as: increased output - decreased output.

[0069] The overload and over-limit judgments are performed again, and the unit output is adjusted for the stable section of the power flow under heavy load until the power flow of the stable section under heavy load is restored to the range of the stable limit threshold value.

[0070] The minimum spinning reserve capacity under current conditions and the next reserve capacity under current conditions are calculated as follows:

[0071]

[0072]

[0073] in, These are the second positive and reverse sensitivity unit sequences, P i P represents the active power output of unit i in the current state during the iteration process. i max ,P i min These represent the maximum and minimum unit output of unit i.

[0074] Specifically, under the condition of multiple cross-section power flow exceeding limits and heavy load, the total network reserve capacity under obstruction is calculated as follows:

[0075] The stable sections that exceed the power flow limit are sorted from highest to lowest according to the degree of exceedance. A heavy load threshold is set, and the stable sections that exceed the heavy load threshold are used as the set of analysis objects.

[0076] The set of analysis objects is traversed, and the above methods are used to adjust the unit output for power flow exceeding the limit section and heavy load section respectively;

[0077] After each unit output adjustment, the power flow of the entire network is calculated using the AC power flow method. Overload and limit exceedance judgments are performed again, the set of analysis objects is corrected, and this is used as the base section for the next calculation. This continues until the power flow of the stable sections with overload and limit exceedances returns to the range of stable limit threshold values.

[0078] Complete the traversal of the analysis object set, calculate the minimum rotating reserve capacity under obstruction and the next obstruction capacity of the entire network under the current state, that is:

[0079]

[0080]

[0081] Where S is the set of all units, P i For the active power output of unit i during the iteration process, P i max ,P i min These represent the maximum and minimum active power outputs of unit i.

[0082] Another embodiment of the present invention provides a sensitivity-based grid reserve capacity calculation device, comprising:

[0083] The judgment module is used to acquire real-time power grid models, operating data and stable sections, perform power flow calculations across the entire network, judge overload and over-limit conditions of stable sections, and calculate the sensitivity of generator power flow changes to active power changes of stable sections.

[0084] The adjustment module is used to adjust the unit output based on the sensitivity of generator power flow changes to active power changes in the stable section for power flow exceeding limits and power flow under heavy load, until the power flow exceeding limits and power flow under heavy load reach the steady-state limit threshold.

[0085] as well as,

[0086] The calculation module is used to calculate the grid reserve capacity under the current condition.

[0087] In this embodiment, the determination module is specifically used for:

[0088] If the overload threshold is set to 80%, then when the actual value reaches more than 80% of the set upper limit, it is a power flow overload stability section, and when it reaches more than 100%, it is a power flow over-limit stability section.

[0089] In this embodiment, the adjustment module is specifically used for,

[0090] For power flow exceeding the stability section, the sensitivity of generator power flow changes to active power changes at the stability section is sorted from largest to smallest according to positive and negative directions, forming the first positive sensitivity unit sequence and the first negative sensitivity unit sequence.

[0091] One adjustable unit is selected sequentially from the first positive sensitivity unit sequence and the first negative sensitivity unit sequence. The output of the selected positive sensitivity unit is reduced to the minimum unit output, and the output of the selected negative sensitivity unit is increased to the maximum unit output. Through the combined action of the two units, the downward adjustment amount of the power flow over-limit stability section is calculated.

[0092] The overload and over-limit judgments are performed again, and the unit output is adjusted for the over-limit stable section of the power flow until the power flow of the over-limit stable section is restored to the range of the stable limit threshold value.

[0093] as well as,

[0094] For the power flow heavy load stable section, the sensitivity of generator power flow changes to active power changes of the stable section is sorted from small to large according to positive and negative directions respectively, forming a second positive sensitivity unit sequence and a second negative sensitivity unit sequence.

[0095] One adjustable unit is selected sequentially from the second forward sensitivity unit sequence and the second reverse sensitivity unit sequence. The output of the selected forward sensitivity unit is increased to the maximum unit output, and the output of the selected reverse sensitivity unit is decreased to the minimum unit output. Through the combined action of the two units, the upward adjustment of the power flow heavy load stability section is calculated.

[0096] The overload and over-limit judgments are performed again, and the unit output is adjusted for the overloaded stable section until the power flow of the overloaded stable section returns to the stable limit threshold value.

[0097] In this embodiment, the calculation module is specifically used for,

[0098] The grid reserve capacity under current conditions is calculated as follows:

[0099]

[0100]

[0101] Among them, R 旋转备用受阻 R is the minimum rotating reserve capacity of the power grid under resistance. 下备用受阻 Let S be the minimum standby capacity of the power grid under resistance conditions, and let P be the set of all generating units. i P represents the active power output of unit i in its current state during the iteration process. i max ,P i min These are the maximum and minimum active power outputs of unit i, respectively.

[0102] It is worth noting that this device embodiment corresponds to the above method embodiment. The implementation methods of the above method embodiments are all applicable to this device embodiment and can achieve the same or similar technical effects, so they will not be described in detail here.

[0103] Those skilled in the art will understand that embodiments of this application can be provided as methods, systems, or computer program products. Therefore, this application can take the form of a completely hardware embodiment, a completely software embodiment, or an embodiment combining software and hardware aspects. Furthermore, this application can take the form of a computer program product embodied on one or more computer-usable storage media (including but not limited to disk storage, CD-ROM, optical storage, etc.) containing computer-usable program code.

[0104] These computer program instructions may also be loaded onto a computer or other programmable data processing apparatus to cause a series of operational steps to be performed on the computer or other programmable apparatus to produce a computer-implemented process, such that the instructions, which execute on the computer or other programmable apparatus, provide steps for implementing the specified function.

[0105] 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, those skilled in the art should understand that modifications or equivalent substitutions can still be made to the specific implementation of the present invention. Any modifications or equivalent substitutions that do not depart from the spirit and scope of the present invention should be covered within the scope of protection of the claims of the present invention.

Claims

1. A method for calculating grid reserve capacity under resistance based on sensitivity, characterized in that, include: Acquire real-time power grid models, operating data, and stability sections; perform power flow calculations across the entire network; and determine overload and over-limit conditions for stability sections. And to calculate the sensitivity of generator power flow changes to changes in active power at stable sections; For the power flow overload stability section and the power flow heavy load stability section, the unit output is adjusted based on the sensitivity of generator power flow changes to the active power change of the stability section, until the power flow overload stability section and the power flow heavy load stability section reach the steady state limit threshold. Among them, adjusting the unit output based on the sensitivity of generator power flow changes to changes in active power at the stable section when the power flow exceeds the limit includes: For power flow exceeding the stability section, the sensitivity of generator power flow changes to active power changes at the stability section is sorted from largest to smallest according to positive and negative directions, forming the first positive sensitivity unit sequence and the first negative sensitivity unit sequence. One adjustable unit is selected sequentially from the first positive sensitivity unit sequence and the first negative sensitivity unit sequence. The output of the selected positive sensitivity unit is reduced to the minimum unit output, and the output of the selected negative sensitivity unit is increased to the maximum unit output. Through the combined action of the two units, the downward adjustment amount of the power flow over-limit stability section is calculated. The overload and over-limit judgments are performed again, and the unit output is adjusted for the over-limit stable section of the power flow until the power flow of the over-limit stable section is restored to the range of the stable limit threshold value. Adjusting unit output based on the sensitivity of generator power flow changes to active power changes at the stable section under heavy load includes: For the power flow heavy load stable section, the sensitivity of generator power flow changes to active power changes of the stable section is sorted from small to large according to positive and negative directions respectively, forming the second positive sensitivity unit sequence and the second negative sensitivity unit sequence. One adjustable unit is selected sequentially from the second forward sensitivity unit sequence and the second reverse sensitivity unit sequence. The output of the selected forward sensitivity unit is increased to the maximum unit output, and the output of the selected reverse sensitivity unit is decreased to the minimum unit output. Through the combined action of the two units, the upward adjustment of the power flow heavy load stability section is calculated. The heavy load and over-limit judgments are performed again, and the unit output is adjusted for the power flow of the power flow under heavy load stable section until the power flow of the power flow under heavy load stable section is restored to the stable limit threshold value. Calculate the grid reserve capacity under the current conditions.

2. The method for calculating grid reserve capacity under obstruction based on sensitivity according to claim 1, characterized in that, The method for judging overload and over-limit conditions of stable cross sections includes: If the overload threshold is set to 80%, then when the actual value reaches more than 80% of the set upper limit, it is a power flow overload stability section, and when it reaches more than 100%, it is a power flow over-limit stability section.

3. The method for calculating grid reserve capacity under obstruction based on sensitivity according to claim 1, characterized in that, The sensitivity of generator power flow changes to changes in active power at stable cross sections is calculated using the power flow sensitivity matrix method.

4. The method for calculating grid reserve capacity under obstruction based on sensitivity according to claim 1, characterized in that, The grid reserve capacity under pressure includes rotating reserve capacity under pressure and lower reserve capacity under pressure. The calculation of the grid reserve capacity under the current state includes: ， in, For the minimum rotating reserve capacity of the power grid, This represents the minimum reserve capacity under power grid disruption. For all units, For the unit in its current state during the iteration process Those who have made contributions The units The maximum and minimum active power output.

5. The method for calculating grid reserve capacity under obstruction based on sensitivity according to claim 1, characterized in that, The power flow calculation for the entire network is performed using the AC power flow method.

6. A sensitivity-based power grid reserve capacity calculation device, characterized in that, The apparatus for implementing the sensitivity-based grid reserve capacity calculation method of claim 1, comprising: The judgment module is used to acquire real-time power grid models, operating data and stable sections, perform power flow calculations across the entire network, judge overload and over-limit conditions of stable sections, and calculate the sensitivity of generator power flow changes to active power changes of stable sections. The adjustment module is used to adjust the unit output based on the sensitivity of generator power flow changes to active power changes in the stable section under power flow overload and under power flow heavy load conditions, until the stable section under power flow overload and under power flow heavy load conditions reach the steady-state limit threshold. The specific implementation method is as follows: For power flow exceeding the stability section, the sensitivity of generator power flow changes to active power changes at the stability section is sorted from largest to smallest according to positive and negative directions, forming the first positive sensitivity unit sequence and the first negative sensitivity unit sequence. One adjustable unit is selected sequentially from the first positive sensitivity unit sequence and the first negative sensitivity unit sequence. The output of the selected positive sensitivity unit is reduced to the minimum unit output, and the output of the selected negative sensitivity unit is increased to the maximum unit output. Through the combined action of the two units, the downward adjustment amount of the power flow over-limit stability section is calculated. The overload and over-limit judgments are performed again, and the unit output is adjusted for the over-limit stable section of the power flow until the power flow of the over-limit stable section is restored to the range of the stable limit threshold value. as well as, For the power flow heavy load stable section, the sensitivity of generator power flow changes to active power changes of the stable section is sorted from small to large according to positive and negative directions respectively, forming the second positive sensitivity unit sequence and the second negative sensitivity unit sequence. One adjustable unit is selected sequentially from the second forward sensitivity unit sequence and the second reverse sensitivity unit sequence. The output of the selected forward sensitivity unit is increased to the maximum unit output, and the output of the selected reverse sensitivity unit is decreased to the minimum unit output. Through the combined action of the two units, the upward adjustment of the power flow heavy load stability section is calculated. The heavy load and over-limit judgments are performed again, and the unit output is adjusted for the power flow of the power flow under heavy load stable section until the power flow of the power flow under heavy load stable section is restored to the stable limit threshold value. as well as, The calculation module is used to calculate the grid reserve capacity under the current condition.

7. A sensitivity-based power grid reserve capacity calculation device according to claim 6, characterized in that, The judgment module is specifically used for: If the overload threshold is set to 80%, then when the actual value reaches more than 80% of the set upper limit, it is a power flow overload stability section, and when it reaches more than 100%, it is a power flow over-limit stability section.

8. A sensitivity-based power grid reserve capacity calculation device according to claim 6, characterized in that, The calculation module is specifically used for, The grid reserve capacity under the current condition is calculated as follows: ， in, For the minimum rotating reserve capacity of the power grid, This represents the minimum reserve capacity under power grid disruption. For all units, For the unit in its current state during the iteration process Those who have made contributions The units The maximum and minimum active power output.

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