A method, system, device and storage medium for monitoring power grid operation control sections

Abstract

The present invention discloses a method, system, device and storage medium for monitoring a power grid operation control section. The method for monitoring the power grid operation control section calculates the load rate of the target section by obtaining the upper limit value, lower limit value and actual value of the target section, and using the first calculation formula, the second calculation formula, the third calculation formula or the fourth calculation formula according to the numerical values of the actual value, the upper limit value and the lower limit value. The calculation formula is simple, can adapt to the situation where the upper limit value or the lower limit value of the target section is 0 or the reverse power flow does not need to be controlled, and the calculated load rate of the target section is accurate and reliable, clearly reflecting the adjustable margin of the target section and improving the reservation ability of the section margin. At the same time, the load rate calculated based on the embodiments of the present invention can more timely and reliably alarm and regulate when the actual value of the target section is abnormal.

Description

Technical Field

[0001] This application relates to the field of power technology, and in particular to a method, system, device and storage medium for monitoring the operation control section of a power grid. Background Art

[0002] With the increasing scale of the power grid, the continuous growth of load, and the gradual increase in the penetration rate of new energy, problems such as overload or overloading of the operation control section (referred to as section) in the actual operation of the power grid caused by load fluctuations, randomness and volatility of new energy output, and occasional equipment fault tripping in the current power grid operation are becoming more and more prominent. On the one hand, the power grid section is the focus of dispatching control and monitoring in the actual operation of the power grid. When the actual value of the section exceeds the section capacity (the upper limit value and the lower limit value of the section), the monitoring system will remind the dispatcher in the form of an alarm, and then the dispatcher will take corresponding measures to control the section within its section capacity; on the other hand, the operation control section is a safety and stability constraint that must be considered in the optimization clearing model based on unit commitment and economic dispatch commonly used in the power market. When the optimization model optimizes the operation control section as a constraint that can be relaxed, reserving a certain section margin in advance can effectively cope with the real-time power flow fluctuations in the actual operation of the power grid.

[0003] However, it takes a certain amount of time for the dispatcher to control the section, and it is difficult to promptly control the section within its section capacity, and thus the ability to reserve the section margin is also weak. At the same time, there is no relevant literature that details the calculation method of the section load rate, and the existing section load rate calculation methods are complex and diverse, depending on the section control situation of different power grid operation monitoring. Among them, some section load rate calculation methods directly use the absolute value of the actual value of the section as the numerator and the larger value of the absolute value of the upper limit value and the absolute value of the lower limit value of the section as the denominator for calculation. The load rate calculated by this method has low reliability and cannot effectively represent the adjustable margin of the section; another part of the section load rate calculation methods cannot calculate the situation where the upper limit value or the lower limit value of the section is 0. Therefore, the existing section load rate calculation methods have low reliability and cannot accurately calculate the section load rate under various section control situations, thus reducing the ability to reserve the section margin. Summary of the Invention

[0004] The purpose of the present invention is to solve at least to some extent one of the technical problems existing in the prior art.

[0005] To this end, the embodiments of the present invention provide a method, system, device and storage medium for monitoring the operation control section of a power grid, which can simply and accurately calculate the load rate of the operation control section of the power grid under various section control situations, and improve the ability to reserve the section margin.

[0006] To achieve the above technical objectives, the technical solutions adopted in the embodiments of the present invention include:

[0007] On the one hand, the embodiments of the present invention provide a method for monitoring the operation control section of a power grid, including the following steps:

[0008] Obtain the upper limit value, lower limit value and actual value of the determined target section, where the target section is the operation control section that needs to be monitored;

[0009] Judge whether the power flow in the reverse direction of the target section does not need to be controlled;

[0010] If the power flow in the reverse direction of the target section does not need to be controlled, judge whether the actual value of the target section is less than 0;

[0011] If so, calculate the load rate of the target section according to the first calculation formula; if not, calculate the load rate of the target section according to the second calculation formula, and the first calculation formula is:

[0012]

[0013] The second calculation formula is:

[0014]

[0015] If the power flow in the reverse direction of the target section needs to be controlled, or the reverse direction of the target section is not set, judge whether the actual value of the target section is greater than the midpoint value of the target section, and the midpoint value of the target section is the average value of the upper limit value and the lower limit value of the target section;

[0016] If so, calculate the load rate of the target section according to the third calculation formula; if not, calculate the load rate of the target section according to the fourth calculation formula, and the third calculation formula is:

[0017]

[0018] The fourth calculation formula is:

[0019]

[0020] Among them, L u is the upper limit value of the target section, L d is the lower limit value of the target section, L i is the actual value of the target section, and R is the load rate of the target section.

[0021] In addition, according to the method for monitoring the operation control section of a power grid in the above embodiments of the present invention, the following additional technical features may also be included:

[0022] Further, in a method for monitoring a power grid operation control section according to an embodiment of the present invention, the determination of the target section includes:

[0023] Obtain the real-time status of each of the operation control sections;

[0024] Determine the target section according to the real-time status.

[0025] Further, in an embodiment of the present invention, the obtaining of the actual value of the target section includes:

[0026] Read the real-time parameter information of each component in the target section;

[0027] Calculate the actual value of the target section according to the real-time parameter information.

[0028] Further, in an embodiment of the present invention, the determination of whether the reverse power flow of the target section needs to be controlled includes:

[0029] Determine whether the lower limit value of the target section is equal to -9999 or -99999;

[0030] If so, the reverse power flow of the target section does not need to be controlled;

[0031] If not, the reverse power flow of the target section needs to be controlled, or the reverse direction of the target section is not set.

[0032] Further, in an embodiment of the present invention, the method for monitoring a power grid operation control section further includes:

[0033] Confirm that the load rate of the target section is greater than a preset first threshold value and the duration is greater than a preset second threshold value, generate an alarm message for the target section and enter an alarm state, where the duration is the time that the load rate of the target section is greater than the first threshold value, and the first threshold value is less than 100%.

[0034] Further, in an embodiment of the present invention, after confirming that the load rate of the target section is greater than a preset first threshold value and the duration is greater than a preset second threshold value, generating an alarm message for the target section and entering an alarm state, the method for monitoring a power grid operation control section further includes:

[0035] In response to receiving an input cancellation alarm instruction, terminate the alarm state according to the cancellation alarm instruction.

[0036] On the other hand, an embodiment of the present invention provides a power grid operation control section monitoring system, including:

[0037] The first module is used to obtain the upper limit value, lower limit value, and actual value of the determined target section, where the target section is the operating control section that needs to be monitored;

[0038] The second module is used to determine whether the reverse tidal current of the target section does not need to be controlled;

[0039] The third module is used to, if the reverse tidal current of the target section does not need to be controlled, determine whether the actual value of the target section is less than 0;

[0040] The fourth module is used to, if so, calculate the load rate of the target section according to the first calculation formula; if not, calculate the load rate of the target section according to the second calculation formula. The first calculation formula is:

[0041]

[0042] The second calculation formula is:

[0043]

[0044] The fifth module is used to, if the reverse tidal current of the target section needs to be controlled, or if the reverse direction of the target section is not set, determine whether the actual value of the target section is greater than the midpoint value of the target section. The midpoint value of the target section is the average value of the upper limit value and the lower limit value of the target section;

[0045] The sixth module is used to, if so, calculate the load rate of the target section according to the third calculation formula; if not, calculate the load rate of the target section according to the fourth calculation formula. The third calculation formula is:

[0046]

[0047] The fourth calculation formula is:

[0048]

[0049] Among them, L u is the upper limit value of the target section, L d is the lower limit value of the target section, L i is the actual value of the target section, and R is the load rate of the target section.

[0050] Furthermore, in an embodiment of the present invention, the system further includes:

[0051] An alarm module, which is used to confirm that the load rate of the target section is greater than a preset first threshold value and the duration is greater than a preset second threshold value, generate alarm information for the target section and enter an alarm state. The duration is the time during which the load rate of the target section is greater than the first threshold value, and the first threshold value is less than 100%.

[0052] On the other hand, an embodiment of the present invention provides a power grid operation control section monitoring device, including:

[0053] At least one processor;

[0054] At least one memory, which is used to store at least one program;

[0055] When the at least one program is executed by the at least one processor, the at least one processor implements the power grid operation control section monitoring method described above.

[0056] On the other hand, an embodiment of the present invention provides a storage medium, in which a program executable by a processor is stored. The program executable by the processor is used to implement the power grid operation control section monitoring method described above when executed by the processor.

[0057] Advantages and beneficial effects of the present invention:

[0058] In the embodiment of the present invention, by obtaining the upper limit value, lower limit value and actual value of the target section, and when the power flow in the reverse direction of the target section does not need to be controlled, if the actual value of the target section is less than 0, the first calculation formula is used to calculate the load rate of the target section, otherwise the second calculation formula is used to calculate the load rate of the target section; when the power flow in the reverse direction of the target section needs to be controlled or the reverse direction of the target section is not set, if the actual value of the target section is greater than the midpoint value, the third calculation formula is used to calculate the load rate of the target section, otherwise the fourth calculation formula is used to calculate the load rate of the target section. The power grid operation control section monitoring method in the embodiment of the present invention uses a simple calculation formula to calculate the load rate of the target section, which can adapt to the situation where the upper limit value or lower limit value of the target section is 0 or the power flow in the reverse direction does not need to be controlled, and the calculated load rate of the target section is accurate and reliable, clearly reflecting the adjustable margin of the target section and improving the reserved capacity of the section margin. At the same time, the load rate calculated based on the embodiment of the present invention can alarm and regulate more timely and reliably when the actual value of the target section is abnormal. Description of the Drawings

[0059] To more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the following provides an introduction to the relevant technical solution drawings in the embodiments of the present application or the prior art. It should be understood that the drawings in the following introduction are only for conveniently and clearly presenting some embodiments of the technical solutions in the present application. For those skilled in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0060] Figure 1 It is a schematic flowchart of a specific embodiment of a method for monitoring a power grid operation control section according to the present invention;

[0061] Figure 2 It is a flowchart corresponding to a specific embodiment of a method for monitoring a power grid operation control section according to the present invention;

[0062] Figure 3 It is a selection schematic diagram of the third calculation formula and the fourth calculation formula in a specific embodiment of a method for monitoring a power grid operation control section according to the present invention;

[0063] Figure 4 It is a schematic structural diagram of a specific embodiment of a system for monitoring a power grid operation control section according to the present invention;

[0064] Figure 5 It is a schematic structural diagram of a specific embodiment of a device for monitoring a power grid operation control section according to the present invention. Detailed Embodiment

[0065] The following details the embodiments of the present invention. The examples of the embodiments are shown in the drawings, where the same or similar reference numerals represent the same or similar elements or elements with the same or similar functions from beginning to end. The embodiments described below with reference to the drawings are exemplary and are only used to explain the present application, and should not be construed as a limitation to the present application. For the step numbers in the following embodiments, they are only set for convenience of description and illustration, and no limitation is imposed on the order between the steps. The execution order of each step in the embodiments can be adaptively adjusted according to the understanding of those skilled in the art.

[0066] The terms "first", "second", "third", and "fourth", etc. in the specification, claims, and drawings of the present invention are used to distinguish different objects, rather than to describe a specific order. In addition, the terms "comprising" and "having" and any variations thereof are intended to cover non-exclusive inclusion. For example, a process, method, system, product, or device that includes a series of steps or units is not limited to the listed steps or units, but may optionally further include steps or units not listed, or may optionally further include other steps or units inherent to these processes, methods, products, or devices.

[0067] References to "embodiments" in this invention mean that the specific features, structures, or characteristics described in connection with the embodiments can be included in at least one embodiment of the invention. The phrase appears in various places in the specification and does not necessarily refer to the same embodiment, nor is it an independent or alternative embodiment mutually exclusive with other embodiments. It is explicitly and implicitly understood by those skilled in the art that the embodiments described herein can be combined with other embodiments.

[0068] Currently, there is no relevant literature that introduces in detail the calculation method of the section load rate. Moreover, the existing calculation methods of the section load rate are complex and diverse, and need to be determined according to the section control situation of different power grid operation monitoring. Among them, some section load rate calculation methods directly use the absolute value of the actual value of the section as the numerator and the larger value among the absolute values of the upper limit value and the lower limit value of the section as the denominator for calculation. The load rate calculated by this method has low reliability and cannot effectively represent the adjustable margin of the section. Another part of the section load rate calculation methods cannot calculate the situation where the upper limit value or the lower limit value of the section is 0. Therefore, the existing section load rate calculation methods have low reliability and cannot accurately calculate the section load rate under various section control situations, thus reducing the ability to reserve the section margin. For this reason, the present invention proposes a power grid operation control section monitoring method, system, device, and storage medium. By obtaining the upper limit value, lower limit value, and actual value of the target section, and when the power flow in the opposite direction of the target section does not need to be controlled, if the actual value of the target section is less than 0, the first calculation formula is used to calculate the load rate of the target section, otherwise the second calculation formula is used to calculate the load rate of the target section. When the power flow in the opposite direction of the target section needs to be controlled or the target section does not have an opposite direction, if the actual value of the target section is greater than the midpoint value, the third calculation formula is used to calculate the load rate of the target section, otherwise the fourth calculation formula is used to calculate the load rate of the target section. The power grid operation control section monitoring method of the embodiments of the present invention uses a simple calculation formula to calculate the load rate of the target section, can adapt to the situation where the upper limit value or the lower limit value of the target section is 0 or the power flow in the opposite direction does not need to be controlled, and the calculated load rate of the target section is accurate and reliable, clearly reflecting the adjustable margin of the target section and improving the ability to reserve the section margin. At the same time, the load rate calculated based on the embodiments of the present invention can more timely and reliably alarm and regulate when the actual value of the target section appears abnormal.

[0069] Next, a power grid operation control section monitoring method, system, device, and storage medium according to an embodiment of the present invention will be described in detail with reference to the accompanying drawings. First, a power grid operation control section monitoring method according to an embodiment of the present invention will be described with reference to the accompanying drawings.

[0070] Refer to Figure 1, in the embodiments of the present invention, a method for monitoring the operation control section of the power grid is provided. The method for monitoring the operation control section of the power grid in the embodiments of the present invention can be applied to a terminal, or to a server, or can also be software running on a terminal or a server, etc. The terminal can be a tablet computer, a notebook computer, a desktop computer, etc., but is not limited thereto. The server can be an independent physical server, or a server cluster or distributed system composed of multiple physical servers, or can also be a cloud server providing basic cloud computing services such as cloud services, cloud databases, cloud computing, cloud functions, cloud storage, network services, cloud communications, middleware services, domain name services, security services, content delivery networks (CDN), and big data and artificial intelligence platforms.

[0071] Referring to Figure 1 and Figure 2 , a method for monitoring the operation control section of the power grid in the embodiments of the present invention mainly includes the following steps S101 - S106:

[0072] S101. Obtain the upper limit value, lower limit value, and actual value of the determined target section;

[0073] Among them, the target section is the operation control section that needs to be monitored.

[0074] Optionally, in some embodiments, the determination of the target section includes the following steps:

[0075] 1) Obtain the real - time status of each operation control section;

[0076] 2) Determine the target section according to the real - time status.

[0077] Among them, the real - time status of the operation control section includes the status corresponding to the effective condition of the operation control section, that is, the operation control section needs to meet the corresponding effective condition to take effect. It can be understood that the method for monitoring the operation control section of the power grid in the embodiments of the present invention only needs to monitor the effective operation control sections, and the ineffective operation control sections do not need to be monitored.

[0078] Therefore, in some embodiments, according to the real - time status of each operation control section, the effective operation control sections are determined from each operation control section as the target sections.

[0079] It can be understood that the target section can be multiple effective operation control sections. By sequentially monitoring and calculating each target section through the method for monitoring the operation control section of the power grid in the embodiments of the present invention, the monitoring (load rate calculation and alarm) of multiple target sections can be realized.

[0080] According to prior knowledge, the upper limit value and the lower limit value of the target section are pre-set section capacity values. Therefore, in some embodiments, the upper limit value and the lower limit value of the target section are obtained according to the parameters of the target section. In the embodiments of the present invention, when the upper limit value and the lower limit value of the target section are positive numbers, they represent the positive direction of the target section, and when the upper limit value and the lower limit value of the target section are negative numbers, they represent the reverse direction of the target section. Among them, the upper limit value is greater than the lower limit value, and the units of the upper limit value and the lower limit value include MW, MVar, kV, kA, and the number of units.

[0081] Optionally, in some embodiments, obtaining the actual value of the target section includes the following steps:

[0082] 1) Read the real-time parameter information of each component in the target section;

[0083] 2) Calculate the actual value of the target section according to the real-time parameter information.

[0084] Optionally, in some embodiments, the real-time parameter information of each component in the target section is obtained by obtaining the state estimation of the target section; optionally, in some other embodiments, the real-time parameter information of each component in the target section is measured by the power grid measurement system.

[0085] Optionally, in some embodiments, the real-time parameter information of each component in the target section includes real-time information such as the active power and reactive power of the line, the active power and reactive power of the generator, the node voltage, the DC power, the active power and reactive power of the main transformer, etc.

[0086] S102. Determine whether the power flow in the reverse direction of the target section does not need to be controlled;

[0087] Among them, the target section includes a positive direction and a reverse direction. It can be understood that the positive and reverse directions of the target section are two corresponding directions. When one direction is the positive direction, the other direction is the reverse direction. According to step S101, in the embodiments of the present invention, when the upper limit value and the lower limit value of the target section are positive numbers, they represent the positive direction of the target section, and when the upper limit value and the lower limit value of the target section are negative numbers, they represent the reverse direction of the target section. Therefore, if both the upper limit value and the lower limit value of the target section are positive numbers (where the lower limit value can be 0), it means that only the positive direction of the target section is set, and thus the power flow in the positive direction of the target section needs to be controlled (the power flow in at least one direction of the target section needs to be controlled); if both the upper limit value and the lower limit value of the target section are negative numbers (where the upper limit value can be 0), it means that only the reverse direction of the target section is set, and thus the power flow in the reverse direction of the target section needs to be controlled; if the upper limit value of the target section is a positive number and the lower limit value is a negative number, it means that both the positive direction and the reverse direction of the target section are set. At this time, if the power flow in the reverse direction of the target section does not need to be controlled, the power flow in the positive direction needs to be controlled.

[0088] It can be understood that since the tidal current in at least one direction of the target section needs to be controlled, when the tidal current in the reverse direction of the target section does not need to be controlled, the target section must be provided with a positive direction, and the tidal current in the positive direction needs to be controlled, that is, the upper limit value of the target section is a positive number and is not equal to 9999 or 99999.

[0089] Optionally, since the positive direction and the reverse direction of the target section are two opposite directions corresponding to each other, in some embodiments of the present invention, when the target section is provided with a positive direction and a reverse direction, it is stipulated that the tidal current in the positive direction of the target section needs to be controlled. Therefore, the embodiments of the present invention only need to consider whether the tidal current in the reverse direction of the target section needs to be controlled.

[0090] It can be seen from this that S102 can be further divided into the following steps S1021 - S1023:

[0091] Step S1021, determine whether the lower limit value of the target section is equal to -9999 or -99999;

[0092] Step S1022, if so, the tidal current in the reverse direction of the target section does not need to be controlled;

[0093] It can be understood that when the lower limit value of the target section is equal to -9999 or -99999, it means that the tidal current in the reverse direction of the target section does not need to be controlled. At this time, the upper limit value of the target section is a positive number, and the upper limit value is not equal to 9999 or 99999 (the tidal current in the positive direction of the target section needs to be controlled).

[0094] Step S1023, if not, the tidal current in the reverse direction of the target section needs to be controlled, or the target section is not provided with a reverse direction.

[0095] It can be understood that when the lower limit value of the target section is not equal to -9999 or -99999, the lower limit value can be a negative number, 0 or a positive number. In the embodiments of the present invention, if the lower limit value of the target section is a negative number other than -9999 and -99999, it means that the tidal current in the reverse direction of the target section needs to be controlled. At this time, the upper limit value of the target section can be a negative number, 0 or a positive number; if the lower limit value of the target section is 0, it means that the target section is not provided with a reverse direction. At this time, the upper limit value of the target section is a positive number, and the upper limit value is not 9999 or 99999 (the tidal current in the positive direction of the target section needs to be controlled); if the lower limit value of the target section is a positive number other than 9999 and 99999, it means that the target section is not provided with a reverse direction. At this time, the upper limit value of the target section is a positive number, and the upper limit value is not 9999 or 99999 (the tidal current in the positive direction of the target section needs to be controlled).

[0096] S103. If the power flow in the reverse direction of the target section does not need to be controlled, determine whether the actual value of the target section is less than 0;

[0097] Among them, according to step S1023, when the power flow in the reverse direction of the target section does not need to be controlled, the upper limit value of the target section is a positive number, and the upper limit value is not equal to 9999 or 99999.

[0098] S104. If so, calculate the load rate of the target section according to the first calculation formula; if not, calculate the load rate of the target section according to the second calculation formula;

[0099] Among them, the first calculation formula is:

[0100]

[0101] The second calculation formula is:

[0102]

[0103] In the formula, L u is the upper limit value of the target section, L d is the lower limit value of the target section, L i is the actual value of the target section, and R is the load rate of the target section.

[0104] In the embodiment of the present invention, when the power flow in the reverse direction of the target section does not need to be controlled, the lower limit value of the target section is equal to -9999 or -99999, the upper limit value of the target section is a positive number, and the upper limit value is not equal to 9999 or 99999. Therefore, the denominator in the first calculation formula and the second calculation formula does not have a situation of being 0.

[0105] S105. If the power flow in the reverse direction of the target section needs to be controlled, or the target section does not have a reverse direction set, determine whether the actual value of the target section is greater than the midpoint value of the target section;

[0106] Among them, the midpoint value of the target section is the average value of the upper limit value and the lower limit value of the target section.

[0107] S106. If so, calculate the load rate of the target section according to the third calculation formula; if not, calculate the load rate of the target section according to the fourth calculation formula.

[0108] It can be understood that the midpoint value of the target section is

[0109] Figure 3 shows the calculation rule / method of the load rate of the target section when the power flow in the reverse direction of the target section needs to be controlled, or the target section does not have a reverse direction set. Among them, when When calculating the load rate of the target section, the third calculation formula is used, and the third calculation formula is:

[0110]

[0111] When When calculating the load rate of the target section, the fourth calculation formula is used, and the fourth calculation formula is:

[0112]

[0113] It can be understood that referring to Figure 3 , since the upper limit value of the target section is greater than the lower limit value, no matter what the upper limit value and the lower limit value of the target section are, the denominators of the third calculation formula and the fourth calculation formula are not zero.

[0114] According to prior knowledge, when the actual value of the target section exceeds the section capacity (the upper limit value and the lower limit value of the target section), the dispatcher needs to take corresponding measures to regulate the target section so that the actual value of the target section is within its section capacity. However, it takes a certain amount of time for the dispatcher to regulate the target section, and it is difficult to timely bring the actual value of the target section within its section capacity. In addition, when the optimization model optimizes the operating control section as a constraint that can be relaxed, reserving a certain section margin in advance can effectively cope with the real-time power flow fluctuations in the actual operation of the power grid. Therefore, in some embodiments of the present invention, when the load rate of the target section reaches a certain threshold value, a warning is issued, that is, a warning is issued before the actual value of the target section reaches the upper limit value or the lower limit value of the target section, which not only reserves time for the regulator to regulate the target section, but also realizes the reservation of the section margin.

[0115] Optionally, in some embodiments, it is confirmed that the load rate of the target section is greater than a preset first threshold value and the duration is greater than a preset second threshold value, and an alarm message of the target section is generated and the alarm state is entered.

[0116] Wherein, the duration is the time during which the load rate of the target section is greater than the first threshold value, and the first threshold value is less than 100%.

[0117] Optionally, in some embodiments, the first threshold value can be set to 95% or 97%.

[0118] Optionally, in some embodiments, the first threshold value can be set by the dispatcher.

[0119] Optionally, in some embodiments, after the alarm message of the target section is generated and the alarm state is entered, the following steps are further included:

[0120] In response to receiving an input cancel alarm instruction, the alarm state is terminated according to the cancel alarm instruction.

[0121] It is understandable that when the abnormal state of the target section has been eliminated or there is no need for regulation, such as when the load rate of the target section is less than or equal to a preset first threshold value, a cancellation alarm instruction is input, and the power grid operation control section monitoring method according to the embodiments of the present invention terminates the alarm state according to the cancellation alarm instruction, preventing the normal operation of the target section from being affected by the alarm state when the abnormal state of the target section has been eliminated or there is no need for regulation.

[0122] Optionally, in some embodiments, the cancellation alarm instruction can be actively input by the user or dispatcher, or can be automatically input by the system according to the state of the target section.

[0123] Combined with the power grid operation control section monitoring method described in steps S101 - S106, the present invention calculates the load rate of the target section by obtaining the upper limit value, lower limit value and actual value of the target section, and when the power flow in the opposite direction of the target section does not need to be controlled, if the actual value of the target section is less than 0, the first calculation formula is used to calculate the load rate of the target section, otherwise the second calculation formula is used to calculate the load rate of the target section; when the power flow in the opposite direction of the target section needs to be controlled or the opposite direction of the target section is not set, if the actual value of the target section is greater than the midpoint value, the third calculation formula is used to calculate the load rate of the target section, otherwise the fourth calculation formula is used to calculate the load rate of the target section. The power grid operation control section monitoring method according to the embodiments of the present invention uses a simple calculation formula to calculate the load rate of the target section, which can adapt to the situation where the upper limit value or lower limit value of the target section is 0 or the power flow in the opposite direction does not need to be controlled, and the calculated load rate of the target section is accurate and reliable, clearly reflecting the adjustable margin of the target section and improving the reserved capacity of the section margin. At the same time, based on the load rate calculated according to the embodiments of the present invention, it is possible to alarm and regulate the abnormal actual value of the target section more timely and reliably.

[0124] Taking several section situations existing in power grid operation control as examples, based on the power grid operation control section monitoring method according to the embodiments of the present invention, the following specific application embodiments are proposed:

[0125] 1) Power plant startup unit section

[0126] 1. Section capacity is [0.9, 6.5]:

[0127] When starting 1 unit, the load rate is (6.5 - 1) / (6.5 - 0.9) = 98.21%

[0128] When starting 6 units, the load rate is (6 - 0.9) / (6.5 - 0.9) = 91.07%

[0129] 2. Section capacity is [3.9, 5.5]:

[0130] When 4 units are started, the load factor is (5.5 - 4) / (5.5 - 3.9) = 93.75%

[0131] When 5 units are started, the load factor is (5 - 3.9) / (5.5 - 3.9) = 68.75%

[0132] 3. Cross-section capacity is [3.9, 12]:

[0133] When 4 units are started, the load factor is (12 - 4) / (12 - 3.9) = 98.77%

[0134] 4. Cross-section capacity is [0.8, 4.5]:

[0135] When 1 unit is started, the load factor is (4.5 - 1) / (4.5 - 0.8) = 94.59%

[0136] When 4 units are started, the load factor is (4 - 0.8) / (4.5 - 0.8) = 86.49%

[0137] 5. Cross-section capacity is [2.9, 20]:

[0138] When 3 units are started, the load factor is (20 - 3) / (20 - 2.9) = 99.42%

[0139] 2) AC line operation control cross-section

[0140] 1. Cross-section capacity is [-3000, 3000]:

[0141] The load factor corresponding to a power of 2950 is (2950 - (-3000)) / (3000 - (-3000)) = 99.17%. The load factor corresponding to a power of -2950 is (3000 - (-2950)) / (3000 - (-3000)) = 99.17%. The load factor corresponding to a power of 3050 is (3050 - (-3000)) / (3000 - (-3000)) = 100.83%. The load factor corresponding to a power of 0 is (0 - (-3000)) / (3000 - (-3000)) = 50%

[0142] 2. Cross-section capacity is [0, 3000]:

[0143] The load factor corresponding to a power of 0 is (3000 - 0) / (3000 - 0) = 100%

[0144] The load factor corresponding to a power of 3000 is (3000 - 0) / (3000 - 0) = 100%

[0145] The load factor corresponding to a power of -0.5 is (3000 - (-0.5)) / (3000 - 0) = 100.017%

[0146] 3. Section capacity is [-9999, 8300]:

[0147] The load rate corresponding to a power of 8500 is (8500) / (8300) = 102.41%

[0148] The load rate corresponding to a power of 8000 is (8000) / (8300) = 96.39%

[0149] The load rate corresponding to a power of -8000 is (-8000) / (-9999) = 80.00%

[0150] 4. Section capacity is [-99999, 50]:

[0151] The load rate corresponding to a power of 40 is (40) / (50) = 80.00%

[0152] The load rate corresponding to a power of 51 is (40) / (50) = 102%

[0153] The load rate corresponding to a power of -5000 is (-5000) / (-99999) = 5.00%

[0154] 3) AC voltage operation control section

[0155] 1. Voltage constraint of [535, 550]:

[0156] The load rate corresponding to a voltage of 534.5 is (550 - 534.5) / (550 - 535) = 103.33%

[0157] The load rate corresponding to a voltage of 530 is (550 - 530) / (550 - 535) = 133.33%

[0158] The load rate corresponding to a voltage of 551 is (551 - 535) / (550 - 535) = 106.67%

[0159] Next, a grid operation control section monitoring system according to an embodiment of the present application is described with reference to the accompanying drawings.

[0160] Figure 4 It is a schematic structural diagram of a grid operation control section monitoring system according to an embodiment of the present application.

[0161] The system specifically includes:

[0162] The first module 401 is used to obtain the upper limit value, lower limit value, and actual value of the determined target section, where the target section is the operation control section to be monitored;

[0163] The second module 402 is used to determine whether the power flow in the reverse direction of the target section needs to be controlled;

[0164] The third module 403 is used to determine whether the actual value of the target section is less than 0 if the power flow in the reverse direction of the target section does not need to be controlled;

[0165] The fourth module 404 is used to, if so, calculate the load rate of the target section according to the first calculation formula; if not, calculate the load rate of the target section according to the second calculation formula, and the first calculation formula is:

[0166]

[0167] The second calculation formula is:

[0168]

[0169] The fifth module 405 is used to, if the power flow in the reverse direction of the target section needs to be controlled, or if the reverse direction of the target section is not set, determine whether the actual value of the target section is greater than the midpoint value of the target section, and the midpoint value of the target section is the average of the upper limit value and the lower limit value of the target section;

[0170] The sixth module 406 is used to, if so, calculate the load rate of the target section according to the third calculation formula; if not, calculate the load rate of the target section according to the fourth calculation formula, and the third calculation formula is:

[0171]

[0172] The fourth calculation formula is:

[0173]

[0174] where, L u is the upper limit value of the target section, L d is the lower limit value of the target section, L i is the actual value of the target section, and R is the load rate of the target section.

[0175] Further, in an embodiment of the present invention, the system further includes:

[0176] An alarm module is used to confirm that the load rate of the target section is greater than a preset first threshold value and the duration is greater than a preset second threshold value, generate alarm information of the target section and enter an alarm state, where the duration is the time that the load rate of the target section is greater than the first threshold value, and the first threshold value is less than 100%.

[0177] It can be seen that the content in the above method embodiments is applicable to the system embodiments of the present application. The functions specifically implemented by the system embodiments of the present application are the same as those of the above method embodiments, and the beneficial effects achieved are also the same as those of the above method embodiments.

[0178] Referring to Figure 5 , an embodiment of the present application provides a power grid operation control section monitoring device, including:

[0179] At least one processor 501;

[0180] At least one memory 502, configured to store at least one program;

[0181] When the at least one program is executed by the at least one processor 501, the at least one processor 501 implements a power grid operation control section monitoring method as described in steps S101 - S106.

[0182] Similarly, the content in the above method embodiments is applicable to the device embodiments of the present application. The functions specifically implemented by the device embodiments of the present application are the same as those of the above method embodiments, and the beneficial effects achieved are also the same as those of the above method embodiments.

[0183] In some alternative embodiments, the functions / operations mentioned in the block diagrams may not occur in the order mentioned in the operation diagrams. For example, depending on the functions / operations involved, two consecutive blocks shown may actually be executed substantially simultaneously or the blocks can sometimes be executed in the reverse order. Additionally, the embodiments presented and described in the flowcharts of the present application are provided by way of example for a more comprehensive understanding of the technology. The disclosed methods are not limited to the operations and logical flows presented herein. Alternative embodiments are contemplated where the order of various operations is changed and where sub - operations described as part of a larger operation are executed independently.

[0184] In addition, although the present application has been described in the context of functional modules, it should be understood that, unless otherwise stated to the contrary, one or more of the functions and / or features may be integrated in a single physical device and / or software module, or one or more functions and / or features may be implemented in separate physical devices or software modules. It should also be understood that a detailed discussion of the actual implementation of each module is not necessary for understanding the present application. Rather, considering the attributes, functions, and internal relationships of the various functional modules in the devices disclosed herein, the actual implementation of the modules will be understood within the ordinary skills of an engineer. Thus, those skilled in the art can implement the present application as set forth in the claims without undue experimentation. It should also be understood that the specific concepts disclosed are merely illustrative and are not intended to limit the scope of the present application, which is determined by the full scope of the appended claims and their equivalents.

[0185] If the functions are implemented in the form of software functional units and sold or used as independent products, they can be stored in a computer-readable storage medium. Based on this understanding, the technical solution of the present application, in essence, or the part that contributes to the prior art, or a part of this technical solution, can be embodied in the form of a software product. This computer software product is stored in a storage medium and includes several programs for causing a computer device (which may be a personal computer, a server, or a network device, etc.) to execute all or part of the steps of the methods described in the various embodiments of the present application. The foregoing storage medium includes: various media such as USB flash drives, mobile hard disks, read-only memories (ROMs), random access memories (RAMs), magnetic disks, or optical discs that can store program codes.

[0186] The logic and / or steps represented in the flowchart or otherwise described herein, for example, can be considered as a sequenced list of executable programs for implementing logical functions, which can be specifically implemented in any computer-readable medium for use by a program execution system, apparatus, or device (such as a computer-based system, a system including a processor, or other systems that can retrieve and execute programs from the program execution system, apparatus, or device), or in conjunction with these program execution systems, apparatuses, or devices. For the purposes of this specification, a "computer-readable medium" can be any device that can contain, store, communicate, propagate, or transport a program for use by or in conjunction with a program execution system, apparatus, or device.

[0187] More specific examples (nonexhaustive list) of computer-readable media include the following: an electrical connection (electronic device) having one or more wirings, a portable computer diskette (magnetic device), a random access memory (RAM), a read-only memory (ROM), an erasable programmable read-only memory (EPROM or flash memory), an optical fiber device, and a portable compact disc read-only memory (CDROM). Additionally, the computer-readable media can even be paper or other suitable media on which the program can be printed, since the program can be obtained electronically, for example, by optically scanning the paper or other media, followed by editing, interpretation, or otherwise processing as appropriate, and then stored in a computer memory.

[0188] It should be understood that the various parts of the present application can be implemented by hardware, software, firmware, or a combination thereof. In the above-described embodiments, the multiple steps or methods can be implemented by software or firmware stored in a memory and executed by a suitable program execution system. For example, if implemented in hardware, as in another embodiment, any one or a combination of the following techniques well known in the art can be used: discrete logic circuits having logic gate circuits for implementing logical functions on data signals, application specific integrated circuits having appropriate combinational logic gate circuits, programmable gate arrays (PGAs), field programmable gate arrays (FPGAs), and the like.

[0189] In the foregoing description of the present specification, the descriptions referring to the terms "one embodiment / example", "another embodiment / example", or "certain embodiments / examples", etc. mean that the specific features, structures, materials, or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present application. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials, or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

[0190] Although the embodiments of the present application have been shown and described, those of ordinary skill in the art can understand that various changes, modifications, substitutions, and variations can be made to these embodiments without departing from the principles and spirit of the present application, and the scope of the present application is defined by the claims and their equivalents.

[0191] The above has specifically described the preferred embodiments of the present application, but the present application is not limited to the described embodiments. Those skilled in the art can also make various equivalent deformations or substitutions without departing from the spirit of the present application, and these equivalent deformations or substitutions are all included within the scope defined by the claims of the present application.

Claims

1. A method for monitoring the operation control section of a power grid, characterized in that, it includes the following steps: Obtain the upper limit value, lower limit value and actual value of the determined target section, where the target section is the operation control section that needs to be monitored; Judge whether the power flow in the reverse direction of the target section does not need to be controlled; If the power flow in the reverse direction of the target section does not need to be controlled, judge whether the actual value of the target section is less than 0; If so, calculate the load rate of the target section according to the first calculation formula; if not, calculate the load rate of the target section according to the second calculation formula, and the first calculation formula is: The second calculation formula is: If the power flow in the reverse direction of the target section needs to be controlled, or the reverse direction of the target section is not set, judge whether the actual value of the target section is greater than the midpoint value of the target section, and the midpoint value of the target section is the average value of the upper limit value and the lower limit value of the target section; If so, calculate the load rate of the target section according to the third calculation formula; if not, calculate the load rate of the target section according to the fourth calculation formula, and the third calculation formula is: The fourth calculation formula is: Among them, L u is the upper limit value of the target cross-section, and L d is the lower limit value of the target cross-section, and L i is the actual value of the target cross-section, and R is the load rate of the target cross-section.

2. The method for monitoring the operation control section of a power grid according to claim 1, characterized in that, the determination of the target section includes: Obtain the real-time status of each of the operation control sections; Determine the target section according to the real-time status.

3. The method for monitoring the operation control section of a power grid according to claim 1, characterized in that, the acquisition of the actual value of the target section includes: Read the real-time parameter information of each component in the target section; Calculate the actual value of the target section according to the real-time parameter information.

4. The method for monitoring the operation control section of a power grid according to claim 1, characterized in that, the judgment of whether the power flow in the reverse direction of the target section does not need to be controlled includes: Judge whether the lower limit value of the target section is equal to -9999 or -99999; If so, the power flow in the reverse direction of the target section does not need to be controlled; If not, the power flow in the reverse direction of the target section needs to be controlled, or the reverse direction of the target section is not set.

5. The method for monitoring the operation control section of a power grid according to claim 1, characterized in that, the method for monitoring the operation control section of a power grid further includes: Confirm that the load rate of the target section is greater than a preset first threshold value and the duration is greater than a preset second threshold value, generate an alarm message for the target section and enter the alarm state, where the duration is the time that the load rate of the target section is greater than the first threshold value, and the first threshold value is less than 100%.

6. The method for monitoring the operation control section of a power grid according to claim 5, characterized in that, after confirming that the load rate of the target section is greater than a preset first threshold value and the duration is greater than a preset second threshold value, generating an alarm message for the target section and entering the alarm state, the method for monitoring the operation control section of a power grid further includes: In response to receiving an input cancellation alarm instruction, terminate the alarm state according to the cancellation alarm instruction.

7. A power grid operation control section monitoring system, characterized in that, it includes: A first module, configured to obtain the upper limit value, lower limit value and actual value of a determined target section, where the target section is an operation control section that needs to be monitored; A second module, configured to determine whether the power flow in the reverse direction of the target section does not need to be controlled; A third module, configured to, if the power flow in the reverse direction of the target section does not need to be controlled, determine whether the actual value of the target section is less than 0; A fourth module, configured to, if so, calculate the load rate of the target section according to a first calculation formula; if not, calculate the load rate of the target section according to a second calculation formula, and the first calculation formula is: The second calculation formula is: A fifth module, configured to, if the power flow in the reverse direction of the target section needs to be controlled, or the target section does not have a reverse direction set, determine whether the actual value of the target section is greater than the midpoint value of the target section, and the midpoint value of the target section is the average value of the upper limit value and the lower limit value of the target section; A sixth module, configured to, if so, calculate the load rate of the target section according to a third calculation formula; if not, calculate the load rate of the target section according to a fourth calculation formula, and the third calculation formula is: The fourth calculation formula is: Among them, L u is the upper limit value of the target cross-section, L d is the lower limit value of the target cross-section, L i is the actual value of the target cross-section, and R is the load factor of the target cross-section.

8. A power grid operation control section monitoring system according to claim 7, characterized in that, the system further includes: An alarm module, configured to confirm that the load rate of the target section is greater than a preset first threshold value and the duration is greater than a preset second threshold value, generate alarm information for the target section and enter an alarm state, where the duration is the time that the load rate of the target section is greater than the first threshold value, and the first threshold value is less than 100%.

9. A power grid operation control section monitoring device, characterized in that, it includes: At least one processor; At least one memory, configured to store at least one program; When the at least one program is executed by the at least one processor, the at least one processor implements a power grid operation control section monitoring method according to any one of claims 1-6.

10. A storage medium, in which a program executable by a processor is stored, characterized in that, the program executable by the processor is used to implement a power grid operation control section monitoring method according to any one of claims 1-6 when executed by the processor.

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