CN115940159A - Power grid operation control section monitoring method, system, device and storage medium - Google Patents
Power grid operation control section monitoring method, system, device and storage medium Download PDFInfo
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Abstract
The invention discloses a power grid operation control section monitoring method, a system, a device and a storage medium, wherein the power grid operation control section monitoring method is used for calculating the load rate of a target section by acquiring the upper limit value, the lower limit value and the actual value of the target section and adopting a first calculation formula, a second calculation formula, a third calculation formula or a 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, the method can adapt to the condition that the load flow of the target section with the upper limit value or the lower limit value of 0 or in the opposite direction does not need to be controlled, the calculated load rate of the target section is accurate and reliable, the adjustable margin of the target section is clearly reflected, and the reserve capacity of the margin of the section is improved. Meanwhile, the load rate calculated based on the embodiment of the invention can alarm and regulate and control the abnormal actual value of the target section more timely and reliably.
Description
Technical Field
The present application relates to the field of power technologies, and in particular, to a method, a system, a device, and a storage medium for monitoring a power grid operation control section.
Background
With the increasingly large scale of the power grid, the continuous increase of the load and the gradual increase of the permeability of new energy, the problems of overload or overload of an operation control section (section for short) in the actual operation of the power grid caused by load fluctuation or randomness and volatility of new energy output and accidental equipment fault tripping in the current power grid operation are more and more obvious. On one hand, the power grid section is taken as the key point of dispatching control 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), a monitoring system reminds a dispatcher in an alarm mode, and then the dispatcher takes corresponding measures to regulate and control the section within the section capacity; on the other hand, the operation control section is a safety and stability constraint which must be considered by an optimization clearing model based on unit combination and economic dispatching and is generally adopted in the power market, and when the operation control section is optimized as a constraint which can be relaxed by the optimization model, a certain section margin is reserved in advance so as to effectively cope with real-time power flow fluctuation in the actual operation of the power grid.
However, a dispatcher needs a certain time to regulate and control the cross section, and it is difficult to regulate and control the cross section to the capacity of the cross section in time, and the reservation capacity of the margin of the cross section is weak. Meanwhile, no relevant literature data is introduced in detail for the calculation method of the section load rate at present, and the existing calculation method of the section load rate is complex and various and needs to be determined according to the section control conditions of different power grid operation monitoring. The load factor calculation method of the partial section directly adopts the absolute value of the actual value of the section as a numerator, and the larger numerical value of the absolute value of the upper limit value and the absolute value of the lower limit value of the section as a denominator to calculate, and the load factor calculated by the method is not high in reliability and cannot effectively represent the adjustable margin of the section; the other method for calculating the section load factor cannot calculate the case where the upper limit value or the lower limit value of the section is 0. Therefore, the existing section load rate calculation method is low in reliability, and the section load rate cannot be accurately calculated under various section control conditions, so that the reservation capacity of the section margin is reduced.
Disclosure of Invention
The present invention aims to solve at least to some extent one of the technical problems existing in the prior art.
Therefore, the embodiment of the invention provides a method, a system, a device and a storage medium for monitoring a power grid operation control section, which can simply and accurately calculate the load rate of the power grid operation control section under various section control conditions, and improve the reservation capacity of the section margin.
In order to achieve the technical purpose, the technical scheme adopted by the embodiment of the invention comprises the following steps:
in one aspect, an embodiment of the present invention provides a method for monitoring a power grid operation control section, including the following steps:
acquiring an upper limit value, a lower limit value and an actual value of a determined target section, wherein the target section is an operation control section needing to be monitored;
judging whether the power flow in the reverse direction of the target section does not need to be controlled or not;
if the power flow in the reverse direction of the target section does not need to be controlled, judging whether the actual value of the target section is less than 0 or not;
if yes, calculating the load rate of the target section according to a first calculation formula; if not, calculating the load rate of the target section according to a second calculation formula, wherein the first calculation formula is as follows:
the second calculation formula is:
if the power flow in the opposite direction of the target section needs to be controlled, or the target section is not provided with the opposite direction, judging whether the actual value of the target section is greater than the midpoint value of the target section, wherein 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 yes, calculating the load rate of the target section according to a third calculation formula; if not, calculating the load rate of the target section according to a fourth calculation formula, wherein the third calculation formula is as follows:
the fourth calculation formula is:
wherein L is u Is an upper limit value, L, of the target cross section d Is a lower limit value of the target cross section, L i And R is the actual value of the target section, and R is the load factor of the target section.
In addition, the method for monitoring the operation control section of the power grid according to the above embodiment of the present invention may further have the following additional technical features:
further, in the method for monitoring a power grid operation control section according to the embodiment of the present invention, the determining of the target section includes:
acquiring the real-time state of each operation control section;
and determining the target section according to the real-time state.
Further, in an embodiment of the present invention, the obtaining of the actual value of the target cross-section includes:
reading real-time parameter information of each element in the target section;
and calculating to obtain an actual value of the target section according to the real-time parameter information.
Further, in an embodiment of the present invention, the determining whether the power flow in the opposite direction of the target cross section does not need to be controlled includes:
judging 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 cross section needs to be controlled, or the target cross section is not provided with the reverse direction.
Further, in an embodiment of the present invention, the method for monitoring an operation control section of a power grid further includes:
and confirming that the load rate of the target cross section is greater than a preset first threshold value and the duration is greater than a preset second threshold value, generating alarm information of the target cross section and entering an alarm state, wherein the duration is the duration of the load rate of the target cross section greater than the first threshold value, and the first threshold value is less than 100%.
Further, in an embodiment of the present invention, after the determining that the load rate of the target cross-section is greater than a preset first threshold and the duration is greater than a preset second threshold, generating alarm information of the target cross-section and entering an alarm state, the method for monitoring the operation control cross-section of the power grid further includes:
and responding to the received input cancellation alarm instruction, and terminating the alarm state according to the cancellation alarm instruction.
On the other hand, an embodiment of the present invention provides a system for monitoring a power grid operation control section, including:
the device comprises a first module, a second module and a third module, wherein the first module is used for acquiring an upper limit value, a lower limit value and an actual value of a determined target section, and the target section is an operation control section needing to be monitored;
the second module is used for judging whether the power flow in the opposite direction of the target section does not need to be controlled or not;
a third module, configured to determine whether an actual value of the target cross section is smaller than 0 if the load flow in the opposite direction of the target cross section does not need to be controlled;
the fourth module is used for calculating the load rate of the target section according to a first calculation formula if the target section is the target section; if not, calculating the load rate of the target section according to a second calculation formula, wherein the first calculation formula is as follows:
the second calculation formula is:
a fifth module, configured to, if a power flow in the opposite direction of the target cross section needs to be controlled, or the target cross section does not have the opposite direction, determine whether an actual value of the target cross section is greater than a midpoint value of the target cross section, where the midpoint value of the target cross section is an average value of an upper limit value and a lower limit value of the target cross section;
a sixth module, configured to calculate, if yes, a load factor of the target cross section according to a third calculation formula; if not, calculating the load factor of the target section according to a fourth calculation formula, wherein the third calculation formula is as follows:
the fourth calculation formula is:
wherein L is u Is the upper limit value, L, of the target cross section d Is a lower limit value of the target cross section, L i And R is the actual value of the target section, and R is the load factor of the target section.
Further, in one embodiment of the present invention, the system further comprises:
and the warning module is used for 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 warning information of the target section and entering a warning state, wherein the duration is the duration of the load rate of the target section being greater than the first threshold value, and the first threshold value is less than 100%.
On the other hand, an embodiment of the present invention provides a power grid operation control section monitoring apparatus, including:
at least one processor;
at least one memory for storing at least one program;
when the at least one program is executed by the at least one processor, the at least one program causes the at least one processor to implement the method for monitoring an operation control profile of a power grid.
In another aspect, an embodiment of the present invention provides a storage medium, in which a processor-executable program is stored, and the processor-executable program is used to implement the power grid operation control section monitoring method when executed by a processor.
The invention has the advantages and beneficial effects that:
the load rate of the target section is calculated by adopting a first calculation formula if the actual value of the target section is less than 0 or the load rate of the target section is calculated by adopting a second calculation formula if the load rate of the target section is not required to be controlled by acquiring the upper limit value, the lower limit value and the actual value of the target section; and when the load flow in the reverse direction of the target section needs to be controlled or the target section is not provided with the reverse direction, if the actual value of the target section is greater than the midpoint value, calculating the load rate of the target section by adopting a third calculation formula, otherwise, calculating the load rate of the target section by adopting a fourth calculation formula. The method for monitoring the power grid operation control section adopts a simple calculation formula to calculate the load rate of the target section, can adapt to the condition that the upper limit value or the lower limit value of the target section is 0 or the load 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 reflects the adjustable margin of the target section and improves the reservation capacity of the margin of the section. Meanwhile, the load rate calculated based on the embodiment of the invention can alarm and regulate and control the abnormal actual value of the target section more timely and reliably.
Drawings
In order to more clearly describe the embodiments of the present application or the technical solutions in the prior art, the following description is made on the drawings of the embodiments of the present application or the related technical solutions in the prior art, and it should be understood that the drawings in the following description are only for convenience and clarity of describing some embodiments in the technical solutions of the present application, and it is obvious for those skilled in the art that other drawings can be obtained according to these drawings without creative efforts.
Fig. 1 is a schematic flow chart of an embodiment of a method for monitoring a power grid operation control section according to the present invention;
fig. 2 is a flowchart corresponding to an embodiment of a method for monitoring a power grid operation control section according to the present invention;
fig. 3 is a schematic diagram illustrating selection of a third calculation formula and a fourth calculation formula in an embodiment of a method for monitoring an operation control section of a power grid according to the present invention;
FIG. 4 is a schematic structural diagram of an embodiment of a monitoring system for monitoring a power grid operation control section according to the present invention;
fig. 5 is a schematic structural diagram of an embodiment of a monitoring apparatus for monitoring an operation control section of a power grid according to the present invention.
Detailed Description
Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like reference numerals refer to the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the drawings are exemplary only for the purpose of explaining the present application and are not to be construed as limiting the present application. The step numbers in the following embodiments are provided only for convenience of illustration, the order between the steps is not limited at all, and the execution order of each step in the embodiments can be adapted according to the understanding of those skilled in the art.
The terms "first," "second," "third," and "fourth," etc. in the description and claims of the invention and in the accompanying drawings are used for distinguishing between different elements and not for describing a particular sequential order. Furthermore, the terms "include" and "have," as well as any variations thereof, are intended to cover a non-exclusive inclusion. For example, a process, method, system, article, or apparatus that comprises a list of steps or elements is not limited to only those steps or elements listed, but may alternatively include other steps or elements not listed, or inherent to such process, method, article, or apparatus.
Reference in the specification to "an embodiment" means that a particular feature, structure, or characteristic described in connection with the embodiment can be included in at least one embodiment of the invention. The appearances of the phrase in various places in the specification are not necessarily all referring to the same embodiment, nor are separate or alternative embodiments mutually exclusive of other embodiments. It is explicitly and implicitly understood by one skilled in the art that the embodiments described herein can be combined with other embodiments.
At present, no relevant literature data is introduced in detail for a calculation method of the section load rate, and the existing calculation method of the section load rate is complex and various and needs to be determined according to the section control conditions of different power grid operation monitoring. The load factor calculation method of the partial section directly adopts the absolute value of the actual value of the section as a numerator, and the larger numerical value of the absolute value of the upper limit value and the absolute value of the lower limit value of the section as a denominator to calculate, and the load factor calculated by the method is not high in reliability and cannot effectively represent the adjustable margin of the section; the other part of the section load rate calculation method cannot calculate the case that the upper limit value or the lower limit value of the section is 0. Therefore, the existing section load rate calculation method is low in reliability, and the section load rate cannot be accurately calculated under various section control conditions, so that the reservation capacity of the section margin is reduced. The invention provides a method, a system, a device and a storage medium for monitoring a power grid operation control section, wherein the method comprises the steps of acquiring an upper limit value, a lower limit value and an actual value of a target section, and when the load 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, calculating the load rate of the target section by adopting a first calculation formula, otherwise, calculating the load rate of the target section by adopting a second calculation formula; and when the load flow in the reverse direction of the target section needs to be controlled or the target section is not provided with the reverse direction, if the actual value of the target section is greater than the midpoint value, calculating the load rate of the target section by adopting a third calculation formula, otherwise, calculating the load rate of the target section by adopting a fourth calculation formula. The power grid operation control section monitoring method provided by the embodiment of the invention adopts a simple calculation formula to calculate the load rate of the target section, can adapt to the condition that the upper limit value or the lower limit value of the target section is 0 or the load flow in the opposite direction does not need to be controlled, and the calculated load rate of the target section is accurate and reliable, so that the adjustable margin of the target section is clearly reflected, and the reservation capacity of the margin of the section is improved. Meanwhile, the load rate calculated based on the embodiment of the invention can alarm and regulate and control the abnormal actual value of the target section more timely and reliably.
A method, a system, an apparatus, and a storage medium for monitoring a power grid operation control section according to an embodiment of the present invention will be described in detail with reference to the accompanying drawings.
Referring to fig. 1, an embodiment of the present invention provides a method for monitoring a power grid operation control section, where the method for monitoring a power grid operation control section in the embodiment of the present invention may be applied to a terminal, a server, or software running in a terminal or a server. The terminal may be, but is not limited to, a tablet computer, a notebook computer, a desktop computer, and the like. The server may be an independent physical server, a server cluster or a distributed system formed by a plurality of physical servers, or a cloud server providing basic cloud computing services such as a cloud service, a cloud database, cloud computing, a cloud function, cloud storage, a network service, cloud communication, middleware service, a domain name service, a security service, a Content Delivery Network (CDN), a big data and artificial intelligence platform, and the like.
Referring to fig. 1 and fig. 2, a method for monitoring a power grid operation control section in the embodiment of the present invention mainly includes the following steps S101 to S106:
s101, acquiring an upper limit value, a lower limit value and an actual value of the determined target section;
wherein, the target section is an operation control section which needs to be monitored.
Optionally, in some embodiments, the determination of the target section comprises the following steps:
1) Acquiring the real-time state of each operation control section;
2) And determining the target section according to the real-time state.
The real-time state of the operation control section comprises a state corresponding to the operation control section effective condition, namely the operation control section can take effect only if the operation control section has the corresponding effective condition. It can be understood that the method for monitoring the operation control section of the power grid according to the embodiment of the present invention only needs to monitor the operation control section that is already effective, and the operation control section that is not effective does not need to monitor.
Thus, in some embodiments, the operative operational control profile from the various operational control profiles is determined as the target profile based on the real-time status of the various operational control profiles.
It can be understood that the target cross section may be a plurality of effective operation control cross sections, and monitoring calculation (load rate calculation and alarm) of the plurality of target cross sections can be realized by sequentially monitoring and calculating each target cross section by the power grid operation control cross section monitoring method according to the embodiment of the present invention.
According to the priori knowledge, the upper limit value and the lower limit value of the target section are preset section capacity values. Therefore, in some embodiments, the upper limit value and the lower limit value of the target cross section are obtained according to the parameters of the target cross section. In the embodiment of the present invention, the upper limit value and the lower limit value of the target cross section represent positive directions of the target cross section when the upper limit value and the lower limit value of the target cross section are positive numbers, and represent negative directions of the target cross section when the upper limit value and the lower limit value of the target cross section are negative numbers. Wherein, the upper limit value is larger than the lower limit value, and the units of the upper limit value and the lower limit value comprise MW, MVar, kV, kA and the number of the devices.
Optionally, in some embodiments, the obtaining of the actual value of the target section includes the following steps:
1) Reading real-time parameter information of each element in a target section;
2) And calculating to obtain an actual value of the target section according to the real-time parameter information.
Optionally, in some embodiments, the real-time parameter information of each element in the target cross section is obtained by obtaining a state estimation of the target cross section; optionally, in other embodiments, real-time parameter information of each element in the target section is measured by the grid measurement system.
Optionally, in some embodiments, the real-time parameter information of each element in the target cross-section includes real-time information of active power and reactive power of the line, active power and reactive power of the generator, node voltage, direct current power, active power and reactive power of the main transformer, and the like.
S102, judging whether the power flow in the opposite direction of the target section does not need to be controlled or not;
wherein, the target cross section comprises a positive direction and a negative direction. It is understood that the forward and reverse directions of the target cross section are two corresponding directions, and when one direction is forward and reverse, the other direction is reverse. As can be seen from step S101, in the embodiment of the present invention, the upper limit value and the lower limit value of the target cross section are positive numbers, which indicate the positive direction of the target cross section, and the upper limit value and the lower limit value of the target cross section are negative numbers, which indicate the negative direction of the target cross section. Therefore, if the upper limit value and the lower limit value of the target cross section are both positive numbers (wherein the lower limit value can be 0), the target cross section is only provided with a positive direction, and then the power flow in the positive direction of the target cross section needs to be controlled (the power flow in at least one direction in the target cross section needs to be controlled); if the upper limit value and the lower limit value of the target section are both negative numbers (wherein the upper limit value can be 0), the target section is only set with a reverse direction, and then the power flow of the reverse direction of the target section needs to be controlled; if the upper limit value of the target cross section is positive and the lower limit value is negative, the target cross section is provided with a positive direction and a negative direction, and at the moment, if the power flow in the negative direction of the target cross section does not need to be controlled, the power flow in the positive direction needs to be controlled.
It can be understood that, since the power flow in at least one direction in the target cross section needs to be controlled, when the power flow in the opposite direction of the target cross section does not need to be controlled, the target cross section must be provided with a positive direction, and the power flow in the positive direction needs to be controlled, that is, the upper limit value of the target cross section is a positive number and is not equal to 9999 or 99999.
Optionally, since the positive direction and the negative direction of the target cross section are two corresponding directions, in some embodiments of the present invention, when the target cross section is provided with the positive direction and the negative direction, it is specified that the power flow in the positive direction of the target cross section needs to be controlled, so that the embodiment of the present invention only needs to consider whether the power flow in the negative direction of the target cross section needs to be controlled.
It can be seen that S102 can be further divided into the following steps S1021-S1023:
step S1021, judging whether the lower limit value of the target cross section is equal to-9999 or-99999;
step S1022, if yes, the power flow in the reverse direction of the target section does not need to be controlled;
it can be understood that when the lower limit value of the target cross section is equal to-9999 or-99999, the current flow in the reverse direction of the target cross section does not need to be controlled, the upper limit value of the target cross section is a positive number, and the upper limit value is not equal to 9999 or 99999 (the current flow in the positive direction of the target cross section needs to be controlled).
And step S1023, if not, the power flow in the reverse direction of the target cross section needs to be controlled, or the target cross section is not provided with the reverse direction.
It is understood that when the lower limit value of the target cross-section is not equal to-9999 or-99999, the lower limit value may be negative, 0, or positive. In the embodiment of the invention, if the lower limit value of the target cross section is a negative number except-9999 and-99999, it indicates that the power flow in the opposite direction of the target cross section needs to be controlled, and in this case, the upper limit value of the target cross section can be a negative number, 0 or a positive number; if the lower limit value of the target cross section is 0, the target cross section is not set with a reverse direction, the upper limit value of the target cross section is a positive number, and the upper limit value is not 9999 or 99999 (the flow in the positive direction of the target cross section needs to be controlled); if the lower limit of the target cross section is a positive number except 9999 and 99999, it means that the target cross section is not set in a reverse direction, and in this case, the upper limit of the target cross section is a positive number and the upper limit is not 9999 or 99999 (the flow in the forward direction of the target cross section needs to be controlled).
S103, if the power flow in the reverse direction of the target section does not need to be controlled, judging whether the actual value of the target section is smaller than 0;
however, as can be seen from step S1023, when the power flow in the opposite direction of the target cross section does not need to be controlled, the upper limit value of the target cross section is positive and is not equal to 9999 or 99999.
S104, if yes, calculating the load rate of the target section according to a first calculation formula; if not, calculating the load rate of the target section according to a second calculation formula;
wherein the first calculation formula is:
the second calculation formula is:
in the formula, L u Is the upper limit value, L, of the target cross section d Is a lower limit value of the target cross section, L i And R is the actual value of the target section, and R is the load factor of the target section.
In the embodiment of the invention, when the power flow in the opposite 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, neither the denominator in the first calculation formula nor the second calculation formula is 0.
S105, if the power flow of the target section in the opposite direction needs to be controlled or the target section is not provided with the opposite direction, judging whether the actual value of the target section is larger 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.
S106, if yes, calculating the load rate of the target section according to a third calculation formula; if not, calculating the load factor of the target section according to a fourth calculation formula.
It will be appreciated that the midpoint of the target section is
Fig. 3 shows a load factor calculation rule/method of a target cross section in the case that the power flow of the target cross section in the reverse direction needs to be controlled or the target cross section is not provided with the reverse direction. Wherein when
And then, calculating the load rate of the target section by adopting a third calculation formula, wherein the third calculation formula is as follows:
when in use
And then, calculating the load rate of the target section by adopting a fourth calculation formula, wherein the fourth calculation formula is as follows:
it can be understood that, referring to fig. 3, since the upper limit value of the target cross-section is greater than the lower limit value, there is no case where the denominator of the third calculation formula and the fourth calculation formula is 0 regardless of the upper limit value and the lower limit value of the target cross-section.
According to the priori 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), a dispatcher needs to take corresponding measures to regulate and control the target section, so that the actual value of the target section is within the section capacity. However, the dispatcher needs a certain time to regulate and control the target section, and it is difficult to timely bring the actual value of the target section within the section capacity. In addition, when the operation control section is optimized as a constraint capable of being relaxed by the optimization model, a certain section margin is reserved in advance, so that real-time power flow fluctuation in the actual operation of the power grid can be effectively responded. Therefore, in some embodiments of the present invention, when the load factor of the target cross section reaches a certain threshold value, an early warning is given, that is, before the actual value of the target cross section reaches the upper limit value or the lower limit value of the target cross section, the early warning is given, so that not only is time reserved for a controller to regulate and control the target cross section, but also the reservation of the margin of the cross section is realized.
Optionally, in some embodiments, it is determined that the load rate of the target cross section is greater than a preset first threshold and the duration is greater than a preset second threshold, and alarm information of the target cross section is generated and enters an alarm state.
The duration is the duration that the load factor of the target cross section is larger than a first threshold value, and the first threshold value is smaller than 100%.
Alternatively, in some embodiments, the first threshold may be set to 95% or 97%.
Alternatively, in some embodiments, the first threshold may be set by a dispatcher.
Optionally, in some embodiments, after the alarm information of the target fracture surface is generated and enters the alarm state, the method further includes the following steps:
in response to receiving an input cancel alarm instruction, the alarm state is terminated according to the cancel alarm instruction.
It can be understood that, when the abnormal state of the target cross section is eliminated or no regulation is needed, for example, when the load rate of the target cross section is less than or equal to the preset first threshold value, the alarm cancellation instruction is input, the power grid operation control cross section monitoring method according to the embodiment of the invention terminates the alarm state according to the alarm cancellation instruction, and prevents the target cross section from affecting normal operation due to the alarm state when the abnormal state is eliminated or no regulation is needed.
Optionally, in some embodiments, the alarm cancellation command may be actively input by a user or a dispatcher, or may be automatically input by the system according to the state of the target cross section.
With reference to the steps S101 to S106, it can be seen that, in the present invention, by obtaining the upper limit value, the lower limit value and the actual value of the target cross section, and when the load flow in the opposite direction of the target cross section does not need to be controlled, if the actual value of the target cross section is less than 0, the load rate of the target cross section is calculated by using a first calculation formula, otherwise, the load rate of the target cross section is calculated by using a second calculation formula; and when the load flow in the reverse direction of the target section needs to be controlled or the target section is not provided with the reverse direction, if the actual value of the target section is greater than the midpoint value, calculating the load rate of the target section by adopting a third calculation formula, otherwise, calculating the load rate of the target section by adopting a fourth calculation formula. The power grid operation control section monitoring method provided by the embodiment of the invention adopts a simple calculation formula to calculate the load rate of the target section, can adapt to the condition that the upper limit value or the lower limit value of the target section is 0 or the load flow in the opposite direction does not need to be controlled, and the calculated load rate of the target section is accurate and reliable, so that the adjustable margin of the target section is clearly reflected, and the reservation capacity of the margin of the section is improved. Meanwhile, the load rate calculated based on the embodiment of the invention can alarm and regulate and control the abnormal actual value of the target section more timely and reliably.
Taking several section situations existing in the power grid operation control as examples, the power grid operation control section monitoring method based on the embodiment of the invention provides the following specific application embodiments:
1) Power plant starting number section
1. Section capacity [0.9,6.5]:
starting 1 machine, the load rate is (6.5-1)/(6.5-0.9) =98.21%
Starting 6 machines, the load rate is (6-0.9)/(6.5-0.9) =91.07%
2. Cross-sectional capability [3.9,5.5]:
4 startup machines are started, the load rate is (5.5-4)/(5.5-3.9) =93.75%
Starting 5 machines, the load rate is (5-3.9)/(5.5-3.9) =68.75%
3. Section capacity [3.9,12]:
4 bootstraps are started, the load rate is (12-4)/(12-3.9) =98.77%
4. Cross-sectional capability [0.8,4.5]:
starting 1 machine, the load rate is (4.5-1)/(4.5-0.8) =94.59%
Starting 4 machines, the load rate is (4-0.8)/(4.5-0.8) =86.49%
5. Cross-sectional capability [2.9,20]:
starting 3 machines, the load rate is (20-3)/(20-2.9) =99.42%
2) AC line operation control section
1. Cross-sectional capability of [ -3000,3000]:
the load factor for power 2950 was (2950- (-3000))/(3000- (-3000)) =99.17% power-the load factor for power 2950 was (3000- (-2950))/(3000- (-3000)) =99.17% power 3050 was (3050- (-3000))/(3000- (-3000)) =100.83% power 0 was (0- (-3000))/(3000- (-3000)) =50%
2. Section capacity [0,3000]:
the load rate corresponding to the power 0 is (3000-0)/(3000-0) =100%
The load factor corresponding to the power of 3000 is (3000-0)/(3000-0) =100%
The load factor corresponding to the power of-0.5 is (3000- (-0.5))/(3000-0) =100.017%
3. Cross-sectional capability [ -9999,8300]:
the load rate corresponding to the power 8500 is (8500)/(8300) =102.41%
The load rate corresponding to the power 8000 is (8000)/(8300) =96.39%
The load rate corresponding to the power of-8000 is (-8000)/(-9999) =80.00%
4. Cross-sectional capacity of [ -99999,50]:
the load factor corresponding to the power 40 is (40)/(50) =80.00%
The load factor corresponding to the power 51 is (40)/(50) =102%
The load rate corresponding to the power of-5000 is (-5000)/(-99999) =5.00%
3) Ac voltage operation control section
1. [535,550] Voltage constraint:
the load factor corresponding to the voltage 534.5 is (550-534.5)/(550-535) =103.33%
The load factor corresponding to the voltage 530 is (550-530)/(550-535) =133.33%
The load factor corresponding to the voltage 551 is (551-535)/(550-535) =106.67%
Next, a power grid operation control section monitoring system proposed according to an embodiment of the present application is described with reference to the accompanying drawings.
Fig. 4 is a schematic structural diagram of a monitoring system for monitoring an operation control section of a power grid according to an embodiment of the present application.
The system specifically comprises:
a first module 401, configured to obtain an upper limit value, a lower limit value, and an actual value of a determined target cross section, where the target cross section is an operation control cross section that needs to be monitored;
a second module 402, configured to determine whether a power flow in an opposite direction of the target cross section does not need to be controlled;
a third module 403, configured to determine whether an actual value of the target cross section is smaller than 0 if the power flow in the opposite direction of the target cross section does not need to be controlled;
a fourth module 404, configured to, if yes, calculate a load factor of the target cross section according to a first calculation formula; if not, calculating the load rate of the target section according to a second calculation formula, wherein the first calculation formula is as follows:
the second calculation formula is:
a fifth module 405, configured to, if the power flow of the target cross section in the opposite direction needs to be controlled, or the target cross section is not set in the opposite direction, determine whether an actual value of the target cross section is greater than a midpoint value of the target cross section, where the midpoint value of the target cross section is an average value of an upper limit value and a lower limit value of the target cross section;
a sixth module 406, configured to, if yes, calculate a load factor of the target cross section according to a third calculation formula; if not, calculating the load rate of the target section according to a fourth calculation formula, wherein the third calculation formula is as follows:
the fourth calculation formula is:
wherein L is u Is the upper limit value, L, of the target cross section d Is a lower limit value of the target cross section, L i And R is the actual value of the target section, and R is the load factor of the target section.
Further, in one embodiment of the present invention, the system further comprises:
and the warning module is used for 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 warning information of the target section and entering a warning state, wherein the duration is the duration of the load rate of the target section being greater than the first threshold value, and the first threshold value is less than 100%.
It can be seen that the contents in the foregoing method embodiments are all applicable to this system embodiment, the functions specifically implemented by this system embodiment are the same as those in the foregoing method embodiment, and the advantageous effects achieved by this system embodiment are also the same as those achieved by the foregoing method embodiment.
Referring to fig. 5, an embodiment of the present application provides a power grid operation control section monitoring apparatus, including:
at least one processor 501;
at least one memory 502 for storing at least one program;
when the at least one program is executed by the at least one processor 501, the at least one processor 501 is enabled to implement the method for monitoring the operation control profile of the power grid according to steps S101 to S106.
Similarly, the contents of the method embodiments are all applicable to the apparatus embodiments, the functions specifically implemented by the apparatus embodiments are the same as the method embodiments, and the beneficial effects achieved by the apparatus embodiments are also the same as the beneficial effects achieved by the method embodiments.
In alternative embodiments, the functions/acts noted in the block diagrams may occur out of the order noted in the operational illustrations. For example, two blocks shown in succession may, in fact, be executed substantially concurrently, or the blocks may sometimes be executed in the reverse order, depending upon the functionality/acts involved. Furthermore, the embodiments presented and described in the flowcharts of the present application are provided by way of example in order to provide a more comprehensive understanding of the technology. The disclosed methods are not limited to the operations and logic flows presented herein. Alternative embodiments are contemplated in which the order of various operations is changed and in which sub-operations described as part of larger operations are performed independently.
Furthermore, although the present application is 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 will also be appreciated that a detailed discussion regarding the actual implementation of each module is not necessary for an understanding of the present application. Rather, the actual implementation of the various functional modules in the apparatus disclosed herein will be understood within the ordinary skill of an engineer given the nature, function, and interrelationships of the modules. Accordingly, those skilled in the art can, using ordinary skill, practice the present application as set forth in the claims without undue experimentation. It is also to be understood that the specific concepts disclosed are merely illustrative of and not intended to limit the scope of the application, which is defined by the appended claims and their full scope of equivalents.
The functions may be stored in a computer-readable storage medium if they are implemented in the form of software functional units and sold or used as separate products. Based on such understanding, the technical solutions of the present application, which are essential or part of the technical solutions contributing to the prior art, may be embodied in the form of a software product, which is stored in a storage medium and includes several programs for enabling a computer device (which may be a personal computer, a server, or a network device) to execute all or part of the steps of the methods described in the embodiments of the present application. And the aforementioned storage medium includes: a U-disk, a removable hard disk, a Read-Only Memory (ROM), a Random Access Memory (RAM), a magnetic disk or an optical disk, and other various media capable of storing program codes.
The logic and/or steps represented in the flowcharts or otherwise described herein, such as an ordered listing of executable programs that can be considered for implementing logical functions, can be embodied in any computer-readable medium for use by or in connection with a program execution system, apparatus, or device, such as a computer-based system, processor-containing system, or other system that can fetch the programs from the program execution system, apparatus, or device and execute the programs. For the purposes of this description, a "computer-readable medium" can be any means that can contain, store, communicate, propagate, or transport the program for use by or in connection with the program execution system, apparatus, or device.
More specific examples (a non-exhaustive list) of the computer-readable medium would include the following: an electrical connection (electronic device) having one or more wires, 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 medium could even be paper or another suitable medium upon which the program is printed, as the program can be electronically captured, via for instance optical scanning of the paper or other medium, then compiled, interpreted or otherwise processed in a suitable manner if necessary, and then stored in a computer memory.
It should be understood that portions of the present application may be implemented in hardware, software, firmware, or a combination thereof. In the above embodiments, the various steps or methods may be implemented in software or firmware stored in memory and executed by a suitable program execution system. For example, if implemented in hardware, as in another embodiment, any one or combination of the following techniques, which are known in the art, may be used: a discrete logic circuit having a logic gate circuit for implementing a logic function on a data signal, an application specific integrated circuit having an appropriate combinational logic gate circuit, a Programmable Gate Array (PGA), a Field Programmable Gate Array (FPGA), or the like.
In the foregoing description of the specification, reference to the description of "one embodiment/example," "another embodiment/example," or "certain embodiments/examples," etc., means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the application. In this specification, schematic representations of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.
While embodiments of the present application have been shown and described, it will be understood by those of ordinary skill in the art that: numerous changes, modifications, substitutions and alterations can be made to the embodiments without departing from the principles and spirit of the application, the scope of which is defined by the claims and their equivalents.
While the present application has been described with reference to the preferred embodiments, it will be understood by those skilled in the art that various changes in form and details may be made therein without departing from the spirit and scope of the invention as defined by the appended claims.
Claims (10)
1. A power grid operation control section monitoring method is characterized by comprising the following steps:
acquiring an upper limit value, a lower limit value and an actual value of a determined target section, wherein the target section is an operation control section needing to be monitored;
judging whether the power flow in the opposite direction of the target section does not need to be controlled or not;
if the power flow in the opposite direction of the target section does not need to be controlled, judging whether the actual value of the target section is smaller than 0;
if yes, calculating the load rate of the target section according to a first calculation formula; if not, calculating the load factor of the target section according to a second calculation formula, wherein the first calculation formula is as follows:
the second calculation formula is:
if the power flow in the opposite direction of the target section needs to be controlled, or the target section is not provided with the opposite direction, judging whether the actual value of the target section is greater than the midpoint value of the target section, wherein 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 yes, calculating the load rate of the target section according to a third calculation formula; if not, calculating the load rate of the target section according to a fourth calculation formula, wherein the third calculation formula is as follows:
the fourth calculation formula is:
wherein L is u Is an upper limit value, L, of the target cross section d Is a lower limit value of the target cross section, L i And R is the actual value of the target section, and R is the load factor of the target section.
2. A method according to claim 1, wherein the determining of the target profile comprises:
acquiring the real-time state of each operation control section;
and determining the target section according to the real-time state.
3. The method for monitoring the operation control section of the power grid according to claim 1, wherein the obtaining of the actual value of the target section comprises:
reading real-time parameter information of each element in the target section;
and calculating to obtain an actual value of the target section according to the real-time parameter information.
4. The method as claimed in claim 1, wherein the step of determining whether the power flow in the opposite direction of the target section does not need to be controlled comprises:
judging 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 opposite direction of the target cross section needs to be controlled, or the target cross section is not provided with the opposite direction.
5. The method for monitoring the operation control section of the power grid as claimed in claim 1, wherein the method for monitoring the operation control section of the power grid further comprises:
and confirming that the load rate of the target cross section is greater than a preset first threshold value and the duration is greater than a preset second threshold value, generating alarm information of the target cross section and entering an alarm state, wherein the duration is the duration of the load rate of the target cross section being greater than the first threshold value, and the first threshold value is less than 100%.
6. The method according to claim 5, wherein after the determining that the load rate of the target cross section is greater than a preset first threshold and the duration is greater than a preset second threshold, generating the alarm information of the target cross section, and entering the alarm state, the method further comprises:
and responding to the received input alarm canceling instruction, and terminating the alarm state according to the alarm canceling instruction.
7. A system for monitoring an operation control section of a power grid, comprising:
the device comprises a first module, a second module and a third module, wherein the first module is used for acquiring an upper limit value, a lower limit value and an actual value of a determined target section, and the target section is an operation control section needing to be monitored;
the second module is used for judging whether the power flow in the opposite direction of the target section does not need to be controlled or not;
a third module, configured to determine whether an actual value of the target cross section is smaller than 0 if the load flow in the opposite direction of the target cross section does not need to be controlled;
the fourth module is used for calculating the load rate of the target section according to a first calculation formula if the target section is the target section; if not, calculating the load rate of the target section according to a second calculation formula, wherein the first calculation formula is as follows:
the second calculation formula is:
a fifth module, configured to, if a power flow in an opposite direction of the target cross section needs to be controlled, or the target cross section does not have the opposite direction, determine whether an actual value of the target cross section is greater than a midpoint value of the target cross section, where the midpoint value of the target cross section is an average value of an upper limit value and a lower limit value of the target cross section;
a sixth module, configured to, if yes, calculate a load factor of the target cross section according to a third calculation formula; if not, calculating the load factor of the target section according to a fourth calculation formula, wherein the third calculation formula is as follows:
the fourth calculation formula is:
wherein L is u Is the upper limit value, L, of the target cross section d Is a lower limit value, L, of the target cross section i And R is the actual value of the target section, and R is the load factor of the target section.
8. A system for monitoring an operational control profile of a power grid as claimed in claim 7, wherein the system further comprises:
and the warning module is used for 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 warning information of the target section and entering a warning state, wherein the duration is the duration of the load rate of the target section being greater than the first threshold value, and the first threshold value is less than 100%.
9. A power grid operation control section monitoring device is characterized by comprising:
at least one processor;
at least one memory for storing at least one program;
when executed by the at least one processor, the at least one program causes the at least one processor to implement a method of monitoring an operational control profile of a power grid as claimed in any one of claims 1 to 6.
10. A storage medium having stored therein a processor-executable program, wherein the processor-executable program, when executed by a processor, is configured to implement a method of monitoring an operational control profile of a power grid as claimed in any one of claims 1 to 6.
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| CN117435350B (en) * | 2023-12-19 | 2024-04-09 | 腾讯科技（深圳）有限公司 | Method, device, terminal and storage medium for running algorithm model |
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