CN114529215A - Power grid frequency calculation method and device, electronic equipment and storage medium - Google Patents
Power grid frequency calculation method and device, electronic equipment and storage medium Download PDFInfo
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Abstract
The invention discloses a method and a device for calculating power grid frequency, electronic equipment and a storage medium, wherein the method comprises the following steps: the method comprises the steps of obtaining a first measurement period and a second measurement period of the power grid frequency, calculating a first frequency measurement error and a first frequency measurement result corresponding to the first measurement period, calculating a second frequency measurement error and a second frequency measurement result corresponding to the second measurement period, calculating dynamic frequency signal data of the power grid according to the first frequency measurement result, the first frequency measurement error, the second frequency measurement result and the second frequency measurement error and by combining a preset dynamic frequency signal calculation model, and determining the frequency measurement result of the power grid by combining the first frequency measurement result, the first frequency measurement error, the second frequency measurement result and the second frequency measurement error based on the dynamic frequency signal data. The invention improves the calculation efficiency of the power grid frequency by providing the calculation method of the power grid frequency.
Description
Technical Field
The present invention relates to the field of computing power grid frequency, and in particular, to a method and an apparatus for computing power grid frequency, an electronic device, and a storage medium.
Background
The frequency is one of important indexes of the quality of electric energy and is an important parameter reflecting the running state of the power system. In general, the system frequency reflects the basic state of active power supply and demand balance in the power system, and will slowly change in a small range along with the load fluctuation. In a stable operation state, the output power of the generator is balanced with the system load and loss, and the frequency of the power system is a nominal value. If a large-capacity load or a generator is switched and control equipment is not perfect, frequency deviation may be caused, thereby affecting stable operation of the power system and normal operation of user equipment.
When power generation and users are unbalanced, and the power consumption exceeds the load capacity of a generator, so that the power grid operates at low frequency, the power grid is easy to collapse because the power supply and the load are unbalanced at low frequency, namely the stability is poor, and the safe operation of the power grid can be seriously threatened; the frequency is reduced, the rotating speed of the generator and the motor is reduced, the voltage of the end of the generator and the output of the motor are reduced, the quality and the yield of user products are influenced, the rejection rate of industrial users is increased, the consumption of raw materials and energy is increased, and even the burning of power generation equipment and the motor and the damage of other equipment can be caused; the automatic equipment with strict frequency requirements often has maloperation, which causes inaccurate electric clock, increased error of electric measuring instruments, misoperation of safety automatic devices and relay protection, and the like.
The high-frequency operation of the power system refers to an abnormal working condition that the power output of the system is higher than the power consumption of a load under the nominal frequency, most of the working conditions are caused by sudden shedding of a large amount of loads by a power unit due to various reasons, and when the power grid has high frequency, the power system and users are also seriously damaged, especially the power system is more serious in the aspect of safety.
The frequency reflects the basic state of active power supply-demand balance in the power system. The power system operating frequency deviates from the rated value too much, which can bring adverse effects to power consumers and power plants. The accuracy and rapidity of frequency measurement are related to power grid frequency control, so the accuracy and rapidity of frequency measurement are key indexes of power grid frequency control.
Therefore, in order to improve the calculation efficiency of the grid frequency and solve the technical problem that the existing calculation method of the grid frequency is low in efficiency, it is urgently needed to construct a calculation method of the grid frequency.
Disclosure of Invention
The invention provides a method and a device for calculating power grid frequency, electronic equipment and a storage medium, and solves the technical problem that the existing method for calculating the power grid frequency is low in efficiency.
In a first aspect, the present invention provides a method for calculating a grid frequency, including:
acquiring a first measurement period and a second measurement period of the power grid frequency; the first measurement period is greater than the second measurement period;
calculating a first frequency measurement error and a first frequency measurement result corresponding to the first measurement period, and a second frequency measurement error and a second frequency measurement result corresponding to the second measurement period;
calculating to obtain dynamic frequency signal data of the power grid according to the first frequency measurement result, the first frequency measurement error, the second frequency measurement result and the second frequency measurement error by combining a preset dynamic frequency signal calculation model;
determining a frequency measurement of the electrical grid based on the dynamic frequency signal data in combination with the first frequency measurement, the first frequency measurement error, the second frequency measurement, and the second frequency measurement error.
Optionally, the obtaining a first measurement period and a second measurement period of the grid frequency includes:
acquiring a first measurement period of the power grid frequency by a high-precision slow measurement method;
and acquiring a second measurement period of the power grid frequency by a low-precision rapid measurement method.
Optionally, the preset dynamic frequency signal calculation model includes a first dynamic frequency signal calculation model and a second dynamic frequency signal calculation model; according to the first frequency measurement result, the first frequency measurement error, the second frequency measurement result and the second frequency measurement error, in combination with a preset dynamic frequency signal calculation model, calculating to obtain dynamic frequency signal data of the power grid, including:
when the value of the first frequency measurement result is larger than the value of the second frequency measurement result, inputting the first frequency measurement error, the second frequency measurement result and the second frequency measurement error into the first dynamic frequency signal calculation model, and calculating to obtain dynamic frequency signal data of the power grid;
and when the numerical value of the first frequency measurement result is smaller than the numerical value of the second frequency measurement result, inputting the first frequency measurement result, the first frequency measurement error and the second frequency measurement error into the second dynamic frequency signal calculation model, and calculating to obtain dynamic frequency signal data of the power grid.
Optionally, determining a frequency measurement of the electrical grid based on the dynamic frequency signal data in combination with the first frequency measurement, the first frequency measurement error, the second frequency measurement and the second frequency measurement error comprises:
setting a frequency dynamic flag based on the dynamic frequency signal data in combination with the first frequency measurement, the first frequency measurement error, the second frequency measurement, and the second frequency measurement error;
and determining a frequency measurement method of the power grid and a frequency measurement result corresponding to the frequency measurement method based on the frequency dynamic mark.
In a second aspect, the present invention provides a device for calculating a grid frequency, including:
the acquisition module is used for acquiring a first measurement period and a second measurement period of the power grid frequency; the first measurement period is greater than the second measurement period;
an error module, configured to calculate a first frequency measurement error and a first frequency measurement result corresponding to the first measurement period, and a second frequency measurement error and a second frequency measurement result corresponding to the second measurement period;
the dynamic module is used for calculating to obtain dynamic frequency signal data of the power grid by combining a preset dynamic frequency signal calculation model according to the first frequency measurement result, the first frequency measurement error, the second frequency measurement result and the second frequency measurement error;
a result module to determine a frequency measurement of the power grid based on the dynamic frequency signal data in combination with the first frequency measurement, the first frequency measurement error, the second frequency measurement, and the second frequency measurement error.
Optionally, the obtaining module includes:
the high-precision submodule is used for acquiring a first measurement period of the power grid frequency through a high-precision slow measurement method;
and the low sperm module is used for acquiring a second measurement period of the power grid frequency by a low-precision rapid measurement method.
Optionally, the preset dynamic frequency signal calculation model includes a first dynamic frequency signal calculation model and a second dynamic frequency signal calculation model; the dynamic module includes:
the first calculation submodule is used for inputting the first frequency measurement error, the second frequency measurement result and the second frequency measurement error into the first dynamic frequency signal calculation model when the numerical value of the first frequency measurement result is larger than the numerical value of the second frequency measurement result, and calculating to obtain dynamic frequency signal data of the power grid;
and the second calculation submodule is used for inputting the first frequency measurement result, the first frequency measurement error and the second frequency measurement error into the second dynamic frequency signal calculation model when the value of the first frequency measurement result is smaller than the value of the second frequency measurement result, and calculating to obtain dynamic frequency signal data of the power grid.
Optionally, the result module comprises:
a tag sub-module for setting a frequency dynamic tag based on the dynamic frequency signal data in combination with the first frequency measurement, the first frequency measurement error, the second frequency measurement and the second frequency measurement error;
and the determining submodule is used for determining the frequency measuring method of the power grid and a frequency measuring result corresponding to the frequency measuring method based on the frequency dynamic mark.
In a third aspect, the present application provides an electronic device comprising a processor and a memory, wherein the memory stores computer readable instructions, and the computer readable instructions, when executed by the processor, perform the steps of the method as provided in the first aspect.
In a fourth aspect, the present application provides a storage medium having stored thereon a computer program which, when executed by a processor, performs the steps of the method as provided in the first aspect above.
According to the technical scheme, the invention has the following advantages: the invention provides a method for calculating the frequency of a power grid, which comprises the steps of calculating a first frequency measurement error and a first frequency measurement result corresponding to a first measurement period and a second frequency measurement error and a second frequency measurement result corresponding to a second measurement period by obtaining the first measurement period and the second measurement period of the frequency of the power grid, calculating dynamic frequency signal data of the power grid according to the first frequency measurement result, the first frequency measurement error, the second frequency measurement result and the second frequency measurement error and by combining a preset dynamic frequency signal calculation model, calculating and obtaining the dynamic frequency signal data of the power grid based on the dynamic frequency signal data and combining the first frequency measurement result, the first frequency measurement error, the second frequency measurement result and the second frequency measurement error, the frequency measurement result of the power grid is determined, and the technical problem that the existing power grid frequency calculation method is low in efficiency is solved through a power grid frequency calculation method, so that the power grid frequency calculation efficiency is improved.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without inventive exercise.
Fig. 1 is a flowchart of a first embodiment of a method for calculating a grid frequency according to the present invention;
fig. 2 is a flowchart illustrating a second embodiment of a method for calculating a grid frequency according to the present invention;
FIG. 3 is a schematic waveform diagram of a medium-precision frequency measurement method in the power grid frequency calculation method according to the present invention;
FIG. 4 is a schematic diagram illustrating a medium-precision frequency measurement method in a power grid frequency calculation method according to the present invention;
fig. 5 is a block diagram of a power grid frequency calculation apparatus according to an embodiment of the present invention.
Detailed Description
The embodiment of the invention provides a power grid frequency calculation method, a power grid frequency calculation device, electronic equipment and a storage medium, which are used for solving the technical problem that the existing power grid frequency calculation method is low in efficiency.
In order to make the objects, features and advantages of the present invention more obvious and understandable, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the embodiments described below are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
In a first embodiment, referring to fig. 1, fig. 1 is a flowchart of a first method for calculating a grid frequency according to a first embodiment of the present invention, including:
step S101, acquiring a first measurement period and a second measurement period of the power grid frequency; the first measurement period is greater than the second measurement period;
step S102, calculating a first frequency measurement error and a first frequency measurement result corresponding to the first measurement period, and a second frequency measurement error and a second frequency measurement result corresponding to the second measurement period;
step S103, calculating to obtain dynamic frequency signal data of the power grid according to the first frequency measurement result, the first frequency measurement error, the second frequency measurement result and the second frequency measurement error by combining a preset dynamic frequency signal calculation model;
step S104, determining a frequency measurement result of the power grid based on the dynamic frequency signal data by combining the first frequency measurement result, the first frequency measurement error, the second frequency measurement result and the second frequency measurement error.
In the method for calculating a power grid frequency according to the embodiment of the present invention, a first measurement period and a second measurement period of the power grid frequency are obtained, where the first measurement period is greater than the second measurement period, a first frequency measurement error and a first frequency measurement result corresponding to the first measurement period, and a second frequency measurement error and a second frequency measurement result corresponding to the second measurement period are calculated, a preset dynamic frequency signal calculation model is combined according to the first frequency measurement result, the first frequency measurement error, the second frequency measurement result, and the second frequency measurement error, to obtain dynamic frequency signal data of the power grid, and the first frequency measurement result, the first frequency measurement error, the second frequency measurement result, and the second frequency measurement error are combined based on the dynamic frequency signal data, the frequency measurement result of the power grid is determined, and the technical problem that the existing power grid frequency calculation method is low in efficiency is solved through a power grid frequency calculation method, so that the power grid frequency calculation efficiency is improved.
In a second embodiment, referring to fig. 2, fig. 2 is a flowchart illustrating a method for calculating a grid frequency according to the present invention, including:
step S201, acquiring a first measurement period of the power grid frequency through a high-precision slow measurement method;
step S202, acquiring a second measurement period of the power grid frequency by a low-precision rapid measurement method;
step S203, calculating a first frequency measurement error and a first frequency measurement result corresponding to the first measurement period, and a second frequency measurement error and a second frequency measurement result corresponding to the second measurement period;
in the embodiment of the invention, a first frequency measurement error d corresponding to the first measurement period is calculated1And a first frequency measurement Sc1And a second frequency measurement error d corresponding to the second measurement period2And a second frequency measurement Sc2。
In a specific implementation, please refer to fig. 3, fig. 3 is a schematic waveform diagram of a medium-precision frequency measurement method in a power grid frequency calculation method according to the present invention; wherein 301 is a preset gate, 302 is an actual gate, 303 is a standard frequency signal, and 304 is a measured signal.
Referring to fig. 4, fig. 4 is a schematic diagram illustrating a medium-precision frequency measurement method in a power grid frequency calculation method according to the present invention; the reference numeral 401 denotes a preset gating signal, 402 denotes a clear signal, 403 denotes a D flip-flop, 303 denotes a standard frequency signal, 304 denotes a signal to be tested, and CNT1 and CNT2 denote two controllable counters.
The equal-precision frequency measurement method is developed on the basis of a direct frequency measurement method. As shown in FIG. 3, the gate time is not a fixed value, but is an integral multiple of the period of the signal to be measured, i.e. is synchronous with the signal to be measuredThe implementation thereof can be explained with reference to fig. 4. In fig. 4, the preset gate control signal is a pulse for one preset gate time, and the controllable counter CNT1 and the controllable counter CNT2 are two controllable counters. The reference frequency signal 303 is input from the clock input CLK of the controllable counter CNT1 and has a frequency fs. The shaped signal under test 304 (frequency f)x) From the clock input CLK of the controllable counter CNT2, when the preset gate signal is high (preset time starts), the rising edge of the signal under test 304 starts both the controllable counter CNT1 and the controllable counter CNT2 to count simultaneously through the Q terminal of the D flip-flop 403. The controllable counter CNT1 and the controllable counter CNT2 respectively measure the signal under test 304 (frequency f)x) And a standard frequency signal 303 (frequency f)s) And counting at the same time. Similarly, when the preset gate signal is low (the preset time is over), the subsequent rising edge of the signal under test 304 passes through the output of the D flip-flop 403, and the counter is turned off. The counter counts the detected signal 304 by N within a preset gate timexThe count value for the standard signal is Ns. Then the following holds:
from this it can be derived:
wherein f isxFor frequency measurement error, fsIs a standard frequency signal, NxFor counting the detected signal by a counter in a preset gate time, NsThe counting value of the standard signal in one preset gate time is counted.
And the standard signal count value N of the equal-precision measurement methodsThere is an error of ± 1.
According to the formula
NsError. + -. 1, then fxError fs×Nx/(Ns-1)～fs×Nx/(Ns+1)；
NxThe larger, the larger NsThe larger, the larger NsThe smaller the error introduced by + -1. For measurement of frequency signals around 50Hz of the grid frequency, fsUnder certain circumstances, Nx5 cycles, compared to NxThe measurement time is shorter and the measurement error is larger than 50 periods.
The method provided by the invention integrates two measurement results of high-precision slow response and low-precision fast response of frequency measurement, carries out comprehensive calculation, outputs a frequency measurement result capable of obtaining high-precision fast response, can fast respond in a frequency dynamic interval, and reduces the measurement precision to some extent; and outputting a high-precision measurement result in a frequency steady-state interval.
Step S204, when the value of the first frequency measurement result is greater than the value of the second frequency measurement result, inputting the first frequency measurement error, the second frequency measurement result and the second frequency measurement error into the first dynamic frequency signal calculation model, and calculating to obtain dynamic frequency signal data of the power grid;
in the embodiment of the present invention, when the value of the first frequency measurement result is greater than the value of the second frequency measurement result, the dynamic frequency signal data of the power grid is calculated based on the first dynamic frequency signal calculation model.
The first dynamic frequency signal calculation model specifically includes:
Sj3＝Sc2-(d1+d2)；
wherein Sj3Is a dynamic frequency signal of the power grid, Sc2As a second frequency measurement, d1For a first frequency measurement error, d2An error is measured for the second frequency.
Step S205, when the value of the first frequency measurement result is smaller than the value of the second frequency measurement result, inputting the first frequency measurement result, the first frequency measurement error and the second frequency measurement error into the second dynamic frequency signal calculation model, and calculating to obtain dynamic frequency signal data of the power grid;
in the embodiment of the present invention, when the value of the first frequency measurement result is smaller than the value of the second frequency measurement result, the dynamic frequency signal data of the power grid is calculated and obtained based on the second dynamic frequency signal calculation model.
The second dynamic frequency signal calculation model specifically includes:
Sj3＝Sc1+(d1+d2)；
wherein Sj3Is a dynamic frequency signal of the power grid, Sc1As a first frequency measurement result, d1For a first frequency measurement error, d2An error is measured for the second frequency.
Step S206, setting a frequency dynamic flag based on the dynamic frequency signal data by combining the first frequency measurement result, the first frequency measurement error, the second frequency measurement result, and the second frequency measurement error;
in an embodiment of the invention, a frequency dynamic flag is set based on the dynamic frequency signal data in combination with the first frequency measurement result, the first frequency measurement error, the second frequency measurement result and the second frequency measurement error.
In a specific implementation, the frequency dynamics flag is set to 1 when the absolute value of the difference between the first measurement period and the second measurement period is greater than the sum of the first frequency measurement error and the second frequency measurement error.
The frequency dynamics flag is set to 1 when the absolute value of the difference between the first measurement period and the dynamic frequency signal data is less than the first frequency measurement error.
And if the relation among the dynamic frequency signal data, the first frequency measurement result, the first frequency measurement error, the second frequency measurement result and the second frequency measurement error does not satisfy the two conditions, setting the frequency dynamic flag to be 0.
Step S207, determining a frequency measurement method of the power grid and a frequency measurement result corresponding to the frequency measurement method based on the frequency dynamic mark.
In the embodiment of the invention, the frequency measurement method of the power grid and the frequency measurement result corresponding to the frequency measurement method are determined based on the frequency dynamic mark.
In a specific implementation, when the frequency dynamic flag is set to 1, determining to select a low-precision rapid measurement method for power grid frequency measurement, and determining that a first frequency measurement result is a frequency measurement result; and when the frequency dynamic mark is set to be 0, determining to select a high-precision slow measurement method, performing power grid frequency measurement, and determining that the second frequency measurement result is the frequency measurement result.
In the method for calculating a power grid frequency according to the embodiment of the present invention, a first measurement period and a second measurement period of the power grid frequency are obtained, where the first measurement period is greater than the second measurement period, a first frequency measurement error and a first frequency measurement result corresponding to the first measurement period, and a second frequency measurement error and a second frequency measurement result corresponding to the second measurement period are calculated, a preset dynamic frequency signal calculation model is combined according to the first frequency measurement result, the first frequency measurement error, the second frequency measurement result, and the second frequency measurement error, to obtain dynamic frequency signal data of the power grid, and the first frequency measurement result, the first frequency measurement error, the second frequency measurement result, and the second frequency measurement error are combined based on the dynamic frequency signal data, the frequency measurement result of the power grid is determined, and the technical problem that the existing power grid frequency calculation method is low in efficiency is solved through a power grid frequency calculation method, so that the power grid frequency calculation efficiency is improved.
Referring to fig. 5, fig. 5 is a block diagram of a power grid frequency calculating device according to an embodiment of the present invention, including:
an obtaining module 501, configured to obtain a first measurement period and a second measurement period of a power grid frequency; the first measurement period is greater than the second measurement period;
an error module 502, configured to calculate a first frequency measurement error and a first frequency measurement result corresponding to the first measurement period, and a second frequency measurement error and a second frequency measurement result corresponding to the second measurement period;
a dynamic module 503, configured to calculate, according to the first frequency measurement result, the first frequency measurement error, the second frequency measurement result, and the second frequency measurement error, and by combining a preset dynamic frequency signal calculation model, to obtain dynamic frequency signal data of the power grid;
a result module 504 configured to determine a frequency measurement of the power grid based on the dynamic frequency signal data in combination with the first frequency measurement, the first frequency measurement error, the second frequency measurement, and the second frequency measurement error.
In an optional embodiment, the obtaining module 501 includes:
the high-precision submodule is used for acquiring a first measurement period of the power grid frequency through a high-precision slow measurement method;
and the low sperm module is used for acquiring a second measurement period of the power grid frequency by a low-precision rapid measurement method.
In an optional embodiment, the preset dynamic frequency signal calculation model comprises a first dynamic frequency signal calculation model and a second dynamic frequency signal calculation model; the dynamic module 503 includes:
the first calculation submodule is used for inputting the first frequency measurement error, the second frequency measurement result and the second frequency measurement error into the first dynamic frequency signal calculation model when the numerical value of the first frequency measurement result is larger than the numerical value of the second frequency measurement result, and calculating to obtain dynamic frequency signal data of the power grid;
and the second calculation submodule is used for inputting the first frequency measurement result, the first frequency measurement error and the second frequency measurement error into the second dynamic frequency signal calculation model when the numerical value of the first frequency measurement result is smaller than the numerical value of the second frequency measurement result, and calculating to obtain the dynamic frequency signal data of the power grid.
In an alternative embodiment, the results module 504 includes:
a tag sub-module for setting a frequency dynamic tag based on the dynamic frequency signal data in combination with the first frequency measurement, the first frequency measurement error, the second frequency measurement and the second frequency measurement error;
and the determining submodule is used for determining the frequency measuring method of the power grid and a frequency measuring result corresponding to the frequency measuring method based on the frequency dynamic mark.
An embodiment of the present invention further provides an electronic device, which includes a memory and a processor, where the memory stores a computer program, and when the computer program is executed by the processor, the processor executes the steps of the method for calculating a grid frequency according to any of the above embodiments.
The embodiment of the present invention further provides a computer storage medium, on which a computer program is stored, and when the computer program is executed by the processor, the method for calculating the grid frequency according to any of the above embodiments is implemented.
It is clear to those skilled in the art that, for convenience and brevity of description, the specific working processes of the above-described systems, apparatuses and units may refer to the corresponding processes in the foregoing method embodiments, and are not described herein again.
In the embodiments provided in the present application, it should be understood that the method, apparatus, electronic device and storage medium disclosed in the present application may be implemented in other ways. For example, the above-described apparatus embodiments are merely illustrative, and for example, the division of the units is only one logical division, and other divisions may be realized in practice, for example, a plurality of units or components may be combined or integrated into another system, or some features may be omitted, or not executed. In addition, the shown or discussed mutual coupling or direct coupling or communication connection may be an indirect coupling or communication connection through some interfaces, devices or units, and may be in an electrical, mechanical or other form.
The units described as separate parts may or may not be physically separate, and parts displayed as units may or may not be physical units, may be located in one place, or may be distributed on a plurality of network units. Some or all of the units can be selected according to actual needs to achieve the purpose of the solution of the embodiment.
In addition, functional units in the embodiments of the present invention may be integrated into one processing unit, or each unit may exist alone physically, or two or more units are integrated into one unit. The integrated unit can be realized in a form of hardware, and can also be realized in a form of a software functional unit.
The integrated unit, if implemented in the form of a software functional unit and sold or used as a stand-alone product, may be stored in a computer readable storage medium. Based on such understanding, the technical solution of the present invention may be embodied in the form of a software product, which is stored in a readable storage medium and includes several instructions for causing 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 method according to the embodiments of the present invention. And the aforementioned readable 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 above-mentioned embodiments are only used for illustrating the technical solutions of the present invention, and not for limiting the same; although the present invention has been described in detail with reference to the foregoing embodiments, it should be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; and such modifications or substitutions do not depart from the spirit and scope of the corresponding technical solutions of the embodiments of the present invention.
Claims (10)
1. A method for calculating a grid frequency, comprising:
acquiring a first measurement period and a second measurement period of the power grid frequency; the first measurement period is greater than the second measurement period;
calculating a first frequency measurement error and a first frequency measurement result corresponding to the first measurement period, and a second frequency measurement error and a second frequency measurement result corresponding to the second measurement period;
calculating to obtain dynamic frequency signal data of the power grid according to the first frequency measurement result, the first frequency measurement error, the second frequency measurement result and the second frequency measurement error by combining a preset dynamic frequency signal calculation model;
determining a frequency measurement of the electrical grid based on the dynamic frequency signal data in combination with the first frequency measurement, the first frequency measurement error, the second frequency measurement, and the second frequency measurement error.
2. The method for calculating the grid frequency according to claim 1, wherein obtaining the first measurement period and the second measurement period of the grid frequency comprises:
acquiring a first measurement period of the power grid frequency by a high-precision slow measurement method;
and acquiring a second measurement period of the power grid frequency by a low-precision rapid measurement method.
3. The method for calculating the power grid frequency according to claim 1, wherein the preset dynamic frequency signal calculation model comprises a first dynamic frequency signal calculation model and a second dynamic frequency signal calculation model; according to the first frequency measurement result, the first frequency measurement error, the second frequency measurement result and the second frequency measurement error, in combination with a preset dynamic frequency signal calculation model, calculating to obtain dynamic frequency signal data of the power grid, including:
when the value of the first frequency measurement result is larger than the value of the second frequency measurement result, inputting the first frequency measurement error, the second frequency measurement result and the second frequency measurement error into the first dynamic frequency signal calculation model, and calculating to obtain dynamic frequency signal data of the power grid;
and when the numerical value of the first frequency measurement result is smaller than the numerical value of the second frequency measurement result, inputting the first frequency measurement result, the first frequency measurement error and the second frequency measurement error into the second dynamic frequency signal calculation model, and calculating to obtain dynamic frequency signal data of the power grid.
4. The method of calculating a grid frequency according to claim 1, wherein determining a frequency measurement of the grid based on the dynamic frequency signal data in combination with the first frequency measurement, the first frequency measurement error, the second frequency measurement and the second frequency measurement error comprises:
setting a frequency dynamic flag based on the dynamic frequency signal data in combination with the first frequency measurement, the first frequency measurement error, the second frequency measurement, and the second frequency measurement error;
and determining a frequency measurement method of the power grid and a frequency measurement result corresponding to the frequency measurement method based on the frequency dynamic mark.
5. A grid frequency calculation apparatus, comprising:
the acquisition module is used for acquiring a first measurement period and a second measurement period of the power grid frequency; the first measurement period is greater than the second measurement period;
an error module, configured to calculate a first frequency measurement error and a first frequency measurement result corresponding to the first measurement period, and a second frequency measurement error and a second frequency measurement result corresponding to the second measurement period;
the dynamic module is used for calculating to obtain dynamic frequency signal data of the power grid by combining a preset dynamic frequency signal calculation model according to the first frequency measurement result, the first frequency measurement error, the second frequency measurement result and the second frequency measurement error;
a result module to determine a frequency measurement of the power grid based on the dynamic frequency signal data in combination with the first frequency measurement, the first frequency measurement error, the second frequency measurement, and the second frequency measurement error.
6. The grid frequency calculation apparatus according to claim 5, wherein the obtaining module comprises:
the high-precision submodule is used for acquiring a first measurement period of the power grid frequency through a high-precision slow measurement method;
and the low sperm module is used for acquiring a second measurement period of the power grid frequency by a low-precision rapid measurement method.
7. The grid frequency calculation device according to claim 5, wherein the preset dynamic frequency signal calculation model comprises a first dynamic frequency signal calculation model and a second dynamic frequency signal calculation model; the dynamic module includes:
the first calculation submodule is used for inputting the first frequency measurement error, the second frequency measurement result and the second frequency measurement error into the first dynamic frequency signal calculation model when the numerical value of the first frequency measurement result is larger than the numerical value of the second frequency measurement result, and calculating to obtain dynamic frequency signal data of the power grid;
and the second calculation submodule is used for inputting the first frequency measurement result, the first frequency measurement error and the second frequency measurement error into the second dynamic frequency signal calculation model when the numerical value of the first frequency measurement result is smaller than the numerical value of the second frequency measurement result, and calculating to obtain the dynamic frequency signal data of the power grid.
8. The grid frequency calculation apparatus according to claim 5, wherein the result module comprises:
a tag sub-module for setting a frequency dynamic tag based on the dynamic frequency signal data in combination with the first frequency measurement, the first frequency measurement error, the second frequency measurement and the second frequency measurement error;
and the determining submodule is used for determining the frequency measuring method of the power grid and a frequency measuring result corresponding to the frequency measuring method based on the frequency dynamic mark.
9. An electronic device comprising a processor and a memory, the memory storing computer readable instructions that, when executed by the processor, perform the method of any of claims 1-4.
10. A storage medium having a computer program stored thereon, wherein the computer program, when executed by a processor, performs the method according to any of claims 1-4.
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