CN117394396B - Frequency modulation method, frequency modulation device, storage medium and electronic equipment - Google Patents
Frequency modulation method, frequency modulation device, storage medium and electronic equipment Download PDFInfo
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- CN117394396B CN117394396B CN202311687896.0A CN202311687896A CN117394396B CN 117394396 B CN117394396 B CN 117394396B CN 202311687896 A CN202311687896 A CN 202311687896A CN 117394396 B CN117394396 B CN 117394396B
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Classifications
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J3/00—Circuit arrangements for ac mains or ac distribution networks
- H02J3/24—Arrangements for preventing or reducing oscillations of power in networks
- H02J3/241—The oscillation concerning frequency
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J3/00—Circuit arrangements for ac mains or ac distribution networks
- H02J3/38—Arrangements for parallely feeding a single network by two or more generators, converters or transformers
- H02J3/46—Controlling of the sharing of output between the generators, converters, or transformers
- H02J3/48—Controlling the sharing of the in-phase component
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Abstract
The disclosure relates to a frequency modulation method, a frequency modulation device, a storage medium and electronic equipment, wherein the frequency modulation method comprises the following steps: acquiring a target rotating speed of a generator set at a target moment and a plurality of first rotating speeds in a target time period, wherein the target time period is a time period comprising the target moment; under the condition that the generator set is in the process of first frequency modulation, according to the target rotating speed and a plurality of first rotating speeds, frequency modulation compensation information of the generator set at a target moment is determined; and performing primary frequency modulation on the generator set according to the frequency modulation compensation information.
Description
Technical Field
The disclosure relates to the technical field of generator set control, in particular to a frequency modulation method, a frequency modulation device, a storage medium and electronic equipment.
Background
The frequency is one of the most important parameters for the operation of the power system, and in the actual operation of the power grid, when the electric quantity consumption is not matched with the electric quantity supply, the frequency of the power grid can be changed, and the frequency change of the system can have serious influence on the safety of the generator and the system. Therefore, the regulating system of the generator set is used for regulating the turbine regulating gate to complete the power grid load compensation and correct the fluctuation of the power grid frequency.
In the related art, a rotation speed feedback adjusting system is generally adopted for frequency modulation, but in this way, the generator set is affected by the last frequency modulation effect when performing frequency modulation action, so that the frequency modulation effect is superposed, and the frequency fluctuation situation is more serious.
Disclosure of Invention
The disclosure aims to provide a frequency modulation method, a frequency modulation device, a storage medium and electronic equipment, which are used for realizing frequency adjustment of a generator set.
To achieve the above object, in a first aspect, the present disclosure provides a frequency modulation method, the method comprising:
acquiring a target rotating speed of a generator set at a target moment and a plurality of first rotating speeds in a target time period, wherein the target time period is a time period comprising the target moment;
under the condition that the generator set is in the process of first frequency modulation, according to the target rotating speed and a plurality of first rotating speeds, frequency modulation compensation information of the generator set at a target moment is determined;
and performing primary frequency modulation on the generator set according to the frequency modulation compensation information.
Optionally, the determining that the generator set is at the first frequency modulation includes:
and determining that the generator set is in the first frequency modulation process according to the target rotating speed and the first rotating speeds.
Optionally, the determining that the generator set is in the first frequency modulation according to the target rotation speed and the plurality of first rotation speeds includes:
determining a first moment when the generator set performs the first frequency modulation according to the first rotating speeds;
determining a first frequency modulation duration corresponding to a first target rotating speed according to a preset frequency modulation time corresponding relation, wherein the first target rotating speed is the rotating speed of the generator set at the first moment;
and determining that the generator set is in the first frequency modulation process according to the first time, the target time and the first frequency modulation time.
Optionally, the determining that the generator set is in the first frequency modulation according to the target rotation speed and the plurality of first rotation speeds includes:
determining a first moment when the generator set performs the first frequency modulation according to the first rotating speeds;
determining a first frequency modulation rotating speed corresponding to a first target rotating speed according to a preset frequency modulation time corresponding relation, wherein the first target rotating speed is the rotating speed of the generator set at the first moment;
and determining that the generator set is in the first frequency modulation process according to the first target rotating speed, the target rotating speed and the first frequency modulation rotating speed.
Optionally, the determining the frequency modulation compensation information of the generator set at the target moment according to the target rotating speed and the plurality of first rotating speeds includes:
determining the residual variation of the generator set according to the target rotating speed and the first target rotating speeds in the plurality of first rotating speeds;
and according to the residual variation and the target rotating speed, determining frequency modulation compensation information of the target moment of the generator set.
Optionally, the determining the remaining variation of the generator set according to the target rotation speed and the first target rotation speeds of the plurality of first rotation speeds includes:
determining a time length to be modulated of a first frequency modulation according to a first time, the target time and the first frequency modulation time length, wherein the first time is the time when the generator set performs the first frequency modulation;
determining a first frequency modulation rotation speed to be modulated according to the first target rotation speed, the target rotation speed and a first frequency modulation rotation speed, wherein the first frequency modulation rotation speed is a corresponding rotation speed determined by the first target rotation speed according to a preset frequency modulation time corresponding relation;
and determining the residual variation of the generator set according to the duration to be modulated and the rotating speed to be modulated.
Optionally, the determining the frequency modulation compensation information of the target moment of the generator set according to the residual variation and the target rotating speed includes:
determining a target frequency modulation duration and a target frequency modulation rotating speed corresponding to the target rotating speed according to a preset frequency modulation time corresponding relation;
and determining the frequency modulation compensation information of the generator set at the target moment according to the target frequency modulation time length, the target frequency modulation rotating speed and the residual variation.
In a second aspect, the present disclosure provides a frequency modulation apparatus, the apparatus comprising:
the system comprises an acquisition module, a control module and a control module, wherein the acquisition module is used for acquiring a target rotating speed of a generator set at a target moment and a plurality of first rotating speeds in a target time period, and the target time period is a time period comprising the target moment;
the determining module is used for determining frequency modulation compensation information of the generator set at a target moment according to the target rotating speed and the plurality of first rotating speeds under the condition that the generator set is in the process of first frequency modulation;
and the frequency modulation module is used for carrying out primary frequency modulation on the generator set according to the frequency modulation compensation information.
Optionally, the determining module is configured to determine that the generator set is in the process of the first frequency modulation according to the target rotation speed and the plurality of first rotation speeds.
Optionally, the determining module includes:
the first determining submodule is used for determining a first moment when the generator set carries out the first frequency modulation according to a plurality of first rotating speeds;
the second determining submodule is used for determining a first frequency modulation duration corresponding to a first target rotating speed according to a preset frequency modulation time corresponding relation, wherein the first target rotating speed is the rotating speed of the generator set at the first moment;
and the third determining submodule is used for determining the process of the generator set in the first frequency modulation according to the first moment, the target moment and the first frequency modulation duration.
Optionally, the determining module includes:
a fourth determining submodule, configured to determine a first moment when the generator set performs the first frequency modulation according to a plurality of the first rotational speeds;
a fifth determining submodule, configured to determine a first fm rotational speed corresponding to a first target rotational speed according to a preset fm time correspondence, where the first target rotational speed is a rotational speed of the generator set at the first moment;
and the sixth determining submodule is used for determining the process that the generator set is in the first frequency modulation according to the first target rotating speed, the target rotating speed and the first frequency modulation rotating speed.
Optionally, the determining module includes:
a seventh determining submodule, configured to determine a remaining variation of the generator set according to the target rotational speed and the first target rotational speed among the plurality of first rotational speeds;
and the eighth determining submodule is used for determining frequency modulation compensation information of the target moment of the generator set according to the residual variation and the target rotating speed.
Optionally, the seventh determining submodule is configured to determine a duration to be tuned for the first frequency modulation according to a first time, the target time and the first frequency modulation duration, where the first time is a time when the generator set performs the first frequency modulation;
determining a first frequency modulation rotation speed to be modulated according to the first target rotation speed, the target rotation speed and a first frequency modulation rotation speed, wherein the first frequency modulation rotation speed is a corresponding rotation speed determined by the first target rotation speed according to a preset frequency modulation time corresponding relation;
and determining the residual variation of the generator set according to the duration to be modulated and the rotating speed to be modulated.
Optionally, the eighth determining submodule is configured to determine, according to a preset frequency modulation time correspondence, a target frequency modulation duration and a target frequency modulation speed corresponding to the target rotation speed;
and determining the frequency modulation compensation information of the generator set at the target moment according to the target frequency modulation time length, the target frequency modulation rotating speed and the residual variation.
In a third aspect, the present disclosure provides a non-transitory computer readable storage medium having stored thereon a computer program which when executed by a processor implements the steps of the frequency modulation method provided in the first aspect of the present disclosure.
In a fourth aspect, the present disclosure provides an electronic device comprising:
a memory having a computer program stored thereon;
a processor for executing the computer program in the memory to implement the steps of the frequency modulation method provided in the first aspect of the present disclosure.
According to the technical scheme, the target rotating speed of the target moment of the generator set and a plurality of first rotating speeds in a target time period are obtained, wherein the target time period is a time period comprising the target moment; under the condition that the generator set is in the process of first frequency modulation, according to the target rotating speed and a plurality of first rotating speeds, frequency modulation compensation information of the generator set at a target moment is determined; and performing primary frequency modulation on the generator set according to the frequency modulation compensation information. Therefore, the frequency modulation compensation information of the generator set at the target moment can be determined under the condition that the generator set is in the last frequency modulation process, then the primary frequency modulation can be carried out according to the determined frequency modulation compensation information, the influence of the last frequency modulation on the generator set can be avoided, the situation that the frequency modulation effect is overlapped is prevented, and the frequency fluctuation can be stabilized.
Additional features and advantages of the present disclosure will be set forth in the detailed description which follows.
Drawings
The accompanying drawings are included to provide a further understanding of the disclosure, and are incorporated in and constitute a part of this specification, illustrate the disclosure and together with the description serve to explain, but do not limit the disclosure.
Fig. 1 is a flow chart illustrating a method of frequency modulation according to an exemplary embodiment.
Fig. 2 is a flow chart illustrating a step S102 according to the embodiment shown in fig. 1.
Fig. 3 is a flowchart illustrating another step S102 according to the embodiment shown in fig. 1.
Fig. 4 is a block diagram illustrating a frequency modulation device according to an exemplary embodiment.
Fig. 5 is a block diagram of an electronic device, according to an example embodiment.
Detailed Description
Specific embodiments of the present disclosure are described in detail below with reference to the accompanying drawings. It should be understood that the detailed description and specific examples, while indicating and illustrating the disclosure, are not intended to limit the disclosure.
It is to be understood that the terms "first," "second," and the like in this disclosure are used to describe various information, but such information should not be limited to these terms. These terms are only used to distinguish one type of information from another and do not denote a particular order or importance.
In the description of the present disclosure, unless otherwise indicated, "a plurality" means two or more than two, and other adjectives are similar thereto; "at least one item", "an item" or "a plurality of items" or the like, refer to any combination of these items, including any combination of single item(s) or plural items(s). For example, at least one (a) may represent any number a; as another example, one (or more) of a, b, and c may represent: a, b, c, a-b, a-c, b-c, or a-b-c, wherein a, b, c may be single or plural; "and/or" is an association relationship describing an association object, meaning that there may be three relationships, e.g., a and/or B, which may represent: there are three cases, a alone, a and B together, and B alone, wherein a, B may be singular or plural. The character "/" indicates that the front-rear association object is an or relationship.
Although operations or steps are described in a particular order in the figures in the disclosed embodiments, it should not be understood as requiring that such operations or steps be performed in the particular order shown or in sequential order, or that all illustrated operations or steps be performed, to achieve desirable results. In embodiments of the present disclosure, these operations or steps may be performed serially; these operations or steps may also be performed in parallel; some of these operations or steps may also be performed.
First, an application scenario of the present disclosure is described, where the present disclosure is applied to an application scenario of primary frequency modulation of a generator set. Frequency is one of the most important parameters of the operation of the power system, and the frequency change of the power system can have serious influence on the safety of the generator and the system. Therefore, controlling the system frequency variation within a certain range is one of the main targets of the stable operation of the power grid. In the actual operation of the power grid, when the electric quantity consumption is not matched with the electric quantity supply, tiny components with small change and short fluctuation period can be caused to appear in the frequency of the power grid, the frequency disturbance mainly directly and automatically adjusts a steam turbine regulating gate by a regulating system of the steam turbine generator unit to finish the power grid load compensation, and the fluctuation of the frequency of the power grid is corrected, wherein the process is the primary frequency modulation of the power generator unit, the primary frequency modulation is the first defense line of frequency control, and the most direct and rapid effect is played on the stability of the frequency of the power grid. For example, when the power grid is used as a huge inertia system and the active power is absent, the rotor of the generator accelerates to increase the frequency of the power grid, and when the frequency of the power grid is stabilized by 50Hz, the rotating speed of the steam turbine is stabilized at 3000rpm through primary frequency modulation, but when the frequency of the power grid is above 50Hz, the rotating speed of the steam turbine can be 3010rpm, and when the frequency of the power grid is stabilized by 50Hz, the rotating speed of the steam turbine is required to be reduced to 3000rpm.
In the related art, in order to make the generator set in the power grid load and ensure the stability of the system, a rotation speed feedback adjustment system is generally adopted to perform frequency modulation, and the rotation speed feedback adjustment system (i.e. primary frequency modulation) requires a proportional adjustment mode, and the proportional coefficients of the rotation speed feedback adjustment system are basically equal. For example, the primary frequency modulation compensation factor is fixed to a between 3002 and 3004rpm, and the primary frequency modulation compensation factor is fixed to b between 3004 and 3006rpm, but since frequency modulation is a dynamic process, there are response time and lag time in the frequency modulation process, and thus there are the following technical problems.
1) In the process of generating the primary frequency modulation compensation factor through the function transformation of the difference value of the rotating speed (frequency), the primary frequency modulation compensation factor is determined in an equal proportion mode, so that the primary frequency modulation flexibility is poor, and the fact that the primary frequency modulation compensation factor is very sensitive is found in practical production and life under the condition that the rotating speed of a steam turbine is low, if the primary frequency modulation compensation factor with a fixed value is adopted in a certain rotating speed range, the primary frequency modulation compensation factor can be adjusted in a larger range under the condition that the rotating speed is low, and the frequency fluctuation condition is severe instead, so that the primary frequency modulation effect is not achieved.
2) In the actual application, we find that the frequency modulation action performed at the first moment needs to be obtained at the second moment, but if the frequency still does not return to normal frequency modulation action in the response time period, the situation of overlapping of the final effect may occur, but the frequency fluctuation situation is more serious.
In order to solve the above problems, the present disclosure provides a frequency modulation method, a device, a storage medium, and an electronic apparatus, where a target rotational speed at a target time of a generator set and a plurality of first rotational speeds within a target time period are obtained, where the target time period is a time period including the target time; under the condition that the generator set is in the process of first frequency modulation, according to the target rotating speed and a plurality of first rotating speeds, frequency modulation compensation information of the generator set at the target moment is determined; and performing primary frequency modulation on the generator set according to the frequency modulation compensation information. Therefore, the frequency modulation compensation information of the generator set at the target moment can be determined under the condition that the generator set is in the last frequency modulation process, then the primary frequency modulation can be carried out according to the determined frequency modulation compensation information, the influence of the last frequency modulation on the generator set can be avoided, the situation that the frequency modulation effect is overlapped is prevented, and the frequency fluctuation can be stabilized.
The following describes specific embodiments of the present invention in detail with reference to the drawings.
Fig. 1 is a flow chart illustrating a method of frequency modulation, as shown in fig. 1, according to an exemplary embodiment, which may include the following steps.
In step S101, a target rotational speed at a target time of the generator set and a plurality of first rotational speeds in a target period of time are acquired.
The target time period is a time period including a target time.
In this step, the rotational speed of the turbine equipment in the generator set at the current time may be first acquired and taken as the target rotational speed, and in the case where the target rotational speed is acquired, a plurality of rotational speeds of the generator set for a period of time before the current time may be acquired and taken as the first rotational speed. In some embodiments, the turbine speed may be periodically monitored by a low frequency monitoring circuit and a high frequency monitoring circuit provided in the turbine apparatus, and a corresponding switching value signal may be output to the control chip according to the turbine speed, and the control chip may determine the target speed at the target time of the generator set and the plurality of first speeds within the target period of time according to the input switching value signal.
For example, the turbine speed may be periodically acquired by the low frequency monitoring circuit and the high frequency monitoring circuit, and the speed data in a preset period of time before the current time may be retained. For example, the rotational speed of the turbine of the generator set within one hour before the current x time may be obtained.
In step S102, in the case where it is determined that the generator set is in the process of the first frequency modulation, frequency modulation compensation information of the generator set at the target time is determined according to the target rotational speed and the plurality of first rotational speeds.
The first frequency modulation process may be a last frequency modulation process of the generator set before the current time, and the frequency modulation compensation information may be frequency modulation compensation information of performing a frequency modulation action on the current time when determining that the generator set needs to perform the frequency modulation action according to the target rotation speed.
In this step, before determining that the generator set is in the first frequency modulation process, it may be first determined, by using the target rotation speed, whether the generator set needs to perform a frequency modulation action at the current moment, and if it is determined that the frequency modulation action needs to be performed, whether the generator set is in the last frequency modulation process is determined again. By adopting the mode, whether the generator set needs frequency modulation or not can be determined in real time, and the efficiency of frequency modulation action is further improved.
In some embodiments, the process of the generator set being at the first frequency modulation may be determined based on the target rotational speed, and the plurality of first rotational speeds.
For example, the plurality of first rotational speeds may be arranged according to the time sequence of collection, and from the plurality of first rotational speeds, according to the rising trend of the rotational speeds, the time point of the last process of performing the first frequency modulation is determined, and the time point is taken as the first time of the first frequency modulation, then the theoretical frequency modulation duration corresponding to the first frequency modulation and the theoretical frequency modulation rotational speed may be determined, specifically, the duration and the frequency modulation rotational speed required for frequency modulation from the rotational speed corresponding to the first time to the normal rotational speed (3000 rpm) may be explained, for example, the duration for frequency modulation from 3015 rpm to 3000rpm is m minutes, and the frequency modulation rotational speed is 3015 rpm to 3000 rpm=15/m rpm under the normal operation condition of the generator set.
And then determining whether the generator set is in the first frequency modulation process according to the currently acquired target rotating speed.
For example, in the case where it is determined that the currently acquired target rotational speed is 3010rpm, 3010rpm is less than 3015 rpm but greater than 3000rpm, so it may be determined that the genset is still in the process of the first frequency modulation; or the process that the generator set is still in the first frequency modulation can be determined according to the fact that the time length from the first time to the current time is n minutes and under the condition that n minutes is less than m minutes.
And in the case of determining that the generator set is in the process of the first frequency modulation, frequency modulation compensation information of the generator set at the target moment can be determined according to the target rotating speed and the plurality of first rotating speeds.
In step S103, primary frequency modulation is performed on the generator set according to the frequency modulation compensation information.
According to the technical scheme, the target rotating speed of the generator set at the target moment and a plurality of first rotating speeds in the target time period are obtained, wherein the target time period is a time period comprising the target moment; under the condition that the generator set is in the process of first frequency modulation, according to the target rotating speed and a plurality of first rotating speeds, frequency modulation compensation information of the generator set at the target moment is determined; and performing primary frequency modulation on the generator set according to the frequency modulation compensation information. Therefore, the frequency modulation compensation information of the generator set at the target moment can be determined under the condition that the generator set is in the last frequency modulation process, then the primary frequency modulation can be carried out according to the determined frequency modulation compensation information, the influence of the last frequency modulation on the generator set can be avoided, the situation that the frequency modulation effect is overlapped is prevented, and the frequency fluctuation can be stabilized.
In some embodiments, as shown in fig. 2, the step S102 may include the following steps.
In step S1021, a first time when the generator set performs the first frequency modulation is determined according to the plurality of first rotational speeds.
In some embodiments, the first time when the generator set performs the first frequency modulation may be determined according to a change trend of the plurality of first rotational speeds in a period of time before the obtained current time.
For example, after the obtained plurality of first rotational speeds are arranged in time sequence, a time at a rotational speed inflection point closest to the current time is taken as the first time of the first frequency modulation, where the rotational speed inflection point may be an inflection point from an upward trend to a downward trend closest to the current time, or may be an inflection point from a downward trend to an upward trend closest to the current time.
In step S1022, a first frequency modulation duration corresponding to the first target rotation speed is determined according to the preset frequency modulation time correspondence.
The first target rotating speed is the rotating speed of the generator set at the first moment.
In some embodiments, a preset time correspondence may be first obtained, where the preset time correspondence may be determined in the following manner.
The characteristic of the primary frequency modulation data segment of the generator set can be quantized according to the operating characteristic of the generator set, a frequency abnormality data segment in the power grid frequency history data is selected according to the quantized value of the characteristic, a corresponding actual rotating speed history data segment is selected according to the timestamp of the selected frequency abnormality data segment, the required primary frequency modulation data segment of the generator set is formed by the frequency abnormality data segment and the actual rotating speed history data segment, and a preset corresponding relation of frequency modulation time is determined according to the primary frequency modulation data segment of the generator set.
Then, according to the preset frequency modulation time corresponding relation, a first frequency modulation time length corresponding to the first target rotating speed can be determined.
In some embodiments, a first moment when the generator set performs first frequency modulation may be determined according to a plurality of first rotation speeds; then, according to a preset frequency modulation time corresponding relation, determining a first frequency modulation rotating speed corresponding to a first target rotating speed, wherein the first target rotating speed is the rotating speed of the generator set at a first moment; and determining that the generator set is in the first frequency modulation process according to the first target rotating speed, the target rotating speed and the first frequency modulation rotating speed.
In some embodiments, a first moment when the generator set performs first frequency modulation may be determined according to the plurality of first rotation speeds; then, according to a preset frequency modulation time corresponding relation, determining a first frequency modulation time length corresponding to a first target rotating speed, wherein the first target rotating speed is the rotating speed of the generator set at a first moment; and determining the process of the generator set in the first frequency modulation according to the first moment, the target moment and the first frequency modulation time length.
In step S1023, a process in which the generator set is in the first frequency modulation is determined according to the first time, the target time, and the first frequency modulation duration.
For example, in the case where it is determined that the currently acquired target rotational speed is 3010rpm, 3010rpm is less than 3015 rpm but greater than 3000rpm, so it may be determined that the genset is still in the process of the first frequency modulation; or the process that the generator set is still in the first frequency modulation can be determined according to the fact that the time length from the first time to the current time is n minutes and under the condition that n minutes is less than m minutes.
By adopting the technical scheme, under the condition that the generator set is determined to need to perform frequency modulation action, whether the generator set is in the last frequency modulation process or not can be determined, and the occurrence of the situation that frequency abnormality is more serious due to the superposition of two frequency modulation is prevented.
In some embodiments, as shown in fig. 3, the step S102 may include the following steps.
In step S1024, the remaining variation of the generator set is determined according to the target rotational speed and the first target rotational speeds among the plurality of first rotational speeds.
In this step, the duration to be frequency-modulated of the first frequency modulation may be determined according to the first time, the target time, and the first frequency modulation duration; then determining the first frequency modulation rotation speed to be modulated according to the first target rotation speed, the target rotation speed and the first frequency modulation rotation speed; and determining the residual variation of the generator set according to the duration to be modulated and the rotating speed to be modulated.
In step S1025, frequency modulation compensation information of the generator set at the target moment is determined according to the residual variation and the target rotation speed.
In the step, the target frequency modulation duration and the target frequency modulation rotating speed corresponding to the target rotating speed can be determined according to the preset frequency modulation time corresponding relation; and then, according to the target frequency modulation time length, the target frequency modulation rotating speed and the residual variation, determining the frequency modulation compensation information of the target moment of the generator set.
By adopting the technical scheme, the residual variable quantity in the last frequency modulation process can be determined according to the current target rotating speed, and then the frequency modulation compensation information of the current time is determined on the basis of the residual variable quantity of the last time, so that the occurrence of the situation that frequency abnormality is more serious due to the superposition of two frequency modulation can be prevented, frequency modulation compensation can be added on the basis of the last time, and frequency modulation efficiency is improved.
In some embodiments, considering that in actual production and life, in the case that the turbine rotation speed is low, the primary frequency modulation compensation factor is very sensitive, in the process of determining the preset frequency modulation time correspondence, in addition to determining the frequency modulation time correspondence according to the historical data of the generator set, the frequency modulation compensation information value in the historical data may be reduced to a first frequency modulation compensation value in the case that the rotation speed of the generator set is low, for example, in the case that the rotation speed of the generator set is less than or equal to a first preset rotation speed, in the case that the rotation speed of the generator set is greater than the first preset rotation speed and less than or equal to a second preset rotation speed, the frequency modulation compensation information value is determined to be a second frequency modulation compensation value, and in the case that the rotation speed of the generator set is greater than the second preset rotation speed, the frequency modulation compensation information value is determined to be a third frequency modulation compensation value.
The first preset rotating speed is smaller than the second preset rotating speed, and the values of the first frequency modulation compensation value, the second frequency modulation compensation value and the third frequency modulation compensation value can be determined in a mode that the values are reduced according to an equal ratio array, an index array or other values.
Therefore, the problem that the primary frequency modulation compensation factor is too sensitive under the condition of low rotating speed of the steam turbine can be solved.
Fig. 4 is a block diagram of a frequency modulation apparatus according to an exemplary embodiment, and as shown in fig. 4, the frequency modulation apparatus 200 includes:
an obtaining module 201, configured to obtain a target rotation speed of a target moment of a generator set and a plurality of first rotation speeds in a target time period, where the target time period is a time period including the target moment;
a determining module 202, configured to determine frequency modulation compensation information of the generator set at a target moment according to the target rotational speed and the plurality of first rotational speeds in a case where the generator set is determined to be in a process of first frequency modulation;
and the frequency modulation module 203 is configured to perform primary frequency modulation on the generator set according to the frequency modulation compensation information.
Optionally, the determining module 202 is configured to determine that the generator set is in the process of the first frequency modulation according to the target rotational speed and the plurality of first rotational speeds.
Optionally, the determining module 202 includes:
the first determining submodule is used for determining a first moment when the generator set conducts first frequency modulation according to the plurality of first rotating speeds;
the second determining submodule is used for determining a first frequency modulation duration corresponding to a first target rotating speed according to a preset frequency modulation time corresponding relation, wherein the first target rotating speed is the rotating speed of the generator set at a first moment;
and the third determining submodule is used for determining the process of the generator set in the first frequency modulation according to the first moment, the target moment and the first frequency modulation duration.
Optionally, the determining module 202 includes:
the fourth determining submodule is used for determining a first moment when the generator set carries out first frequency modulation according to the plurality of first rotating speeds;
a fifth determining submodule, configured to determine a first frequency-modulation rotation speed corresponding to a first target rotation speed according to a preset frequency-modulation time correspondence, where the first target rotation speed is a rotation speed of the generator set at a first moment;
and the sixth determining submodule is used for determining the process of the generator set in the first frequency modulation according to the first target rotating speed, the target rotating speed and the first frequency modulation rotating speed.
Optionally, the determining module 202 includes:
a seventh determining submodule, configured to determine a remaining variation of the generator set according to the target rotational speed and a first target rotational speed among the plurality of first rotational speeds;
and the eighth determining submodule is used for determining frequency modulation compensation information of the target moment of the generator set according to the residual variable quantity and the target rotating speed.
Optionally, the seventh determining submodule is configured to determine a duration to be tuned for the first frequency modulation according to the first time, the target time, and the first duration to be tuned;
determining a first frequency modulation rotation speed to be modulated according to the first target rotation speed, the target rotation speed and the first frequency modulation rotation speed;
and determining the residual variation of the generator set according to the duration to be modulated and the rotating speed to be modulated.
Optionally, the eighth determining submodule is configured to determine a target frequency modulation duration and a target frequency modulation rotation speed corresponding to the target rotation speed according to a preset frequency modulation time correspondence;
and determining the frequency modulation compensation information of the generator set at the target moment according to the target frequency modulation time length, the target frequency modulation rotating speed and the residual variation.
By adopting the device, the target rotating speed of the generator set at the target moment and a plurality of first rotating speeds in the target time period are obtained, wherein the target time period is a time period comprising the target moment; under the condition that the generator set is in the process of first frequency modulation, according to the target rotating speed and a plurality of first rotating speeds, frequency modulation compensation information of the generator set at the target moment is determined; and performing primary frequency modulation on the generator set according to the frequency modulation compensation information. Therefore, the frequency modulation compensation information of the generator set at the target moment can be determined under the condition that the generator set is in the last frequency modulation process, then the primary frequency modulation can be carried out according to the determined frequency modulation compensation information, the influence of the last frequency modulation on the generator set can be avoided, the situation that the frequency modulation effect is overlapped is prevented, and the frequency fluctuation can be stabilized.
The specific manner in which the various modules perform the operations in the apparatus of the above embodiments have been described in detail in connection with the embodiments of the method, and will not be described in detail herein.
Fig. 5 is a block diagram of an electronic device 500, according to an example embodiment. As shown in fig. 5, the electronic device 500 may include: a processor 501, a memory 502. The electronic device 500 may also include one or more of a multimedia component 503, an input/output (I/O) interface 504, and a communication component 505.
The processor 501 is configured to control the overall operation of the electronic device 500 to perform all or part of the steps in the frequency modulation method described above. The memory 502 is used to store various types of data to support operation at the electronic device 500, which may include, for example, instructions for any application or method operating on the electronic device 500, as well as application-related data, such as contact data, messages sent and received, pictures, audio, video, and so forth. The Memory 502 may be implemented by any type of volatile or non-volatile Memory device or combination thereof, such as static random access Memory (Static Random Access Memory, SRAM for short), electrically erasable programmable Read-Only Memory (Electrically Erasable Programmable Read-Only Memory, EEPROM for short), erasable programmable Read-Only Memory (Erasable Programmable Read-Only Memory, EPROM for short), programmable Read-Only Memory (Programmable Read-Only Memory, PROM for short), read-Only Memory (ROM for short), magnetic Memory, flash Memory, magnetic disk, or optical disk. The multimedia component 503 may include a screen and an audio component. Wherein the screen may be, for example, a touch screen, the audio component being for outputting and/or inputting audio signals. For example, the audio component may include a microphone for receiving external audio signals. The received audio signals may be further stored in the memory 502 or transmitted through the communication component 505. The audio assembly further comprises at least one speaker for outputting audio signals. Input/output (I/O) interface 504 provides an interface between processor 501 and other interface modules, which may be a keyboard, mouse, buttons, etc. These buttons may be virtual buttons or physical buttons. The communication component 505 is used for wired or wireless communication between the electronic device 500 and other devices. Wireless communication, such as Wi-Fi, bluetooth, near field communication (Near Field Communication, NFC for short), 2G, 3G, 4G, NB-IOT, eMTC, or other 5G, etc., or one or a combination of more of them, is not limited herein. The corresponding communication component 505 may thus comprise: wi-Fi module, bluetooth module, NFC module, etc.
In an exemplary embodiment, the electronic device 500 may be implemented by one or more application specific integrated circuits (Application Specific Integrated Circuit, abbreviated as ASIC), digital signal processors (Digital Signal Processor, abbreviated as DSP), digital signal processing devices (Digital Signal Processing Device, abbreviated as DSPD), programmable logic devices (Programmable Logic Device, abbreviated as PLD), field programmable gate arrays (Field Programmable Gate Array, abbreviated as FPGA), controllers, microcontrollers, microprocessors, or other electronic components for performing the frequency modulation methods described above.
In another exemplary embodiment, a computer readable storage medium is also provided, comprising program instructions which, when executed by a processor, implement the steps of the frequency modulation method described above. For example, the computer readable storage medium may be the memory 502 described above including program instructions executable by the processor 501 of the electronic device 500 to perform the frequency modulation method described above.
The preferred embodiments of the present disclosure have been described in detail above with reference to the accompanying drawings, but the present disclosure is not limited to the specific details of the above embodiments, and various simple modifications may be made to the technical solutions of the present disclosure within the scope of the technical concept of the present disclosure, and all the simple modifications belong to the protection scope of the present disclosure.
In addition, the specific features described in the above embodiments may be combined in any suitable manner without contradiction. The various possible combinations are not described further in this disclosure in order to avoid unnecessary repetition.
Moreover, any combination between the various embodiments of the present disclosure is possible as long as it does not depart from the spirit of the present disclosure, which should also be construed as the disclosure of the present disclosure.
Claims (10)
1. A method of frequency modulation, the method comprising:
acquiring a target rotating speed of a generator set at a target moment and a plurality of first rotating speeds in a target time period, wherein the target time period is a time period comprising the target moment;
under the condition that the generator set is in the process of first frequency modulation, frequency modulation compensation information of the generator set at a target moment is determined according to the target rotating speed and a plurality of first rotating speeds;
performing primary frequency modulation on the generator set according to the frequency modulation compensation information;
the determining the frequency modulation compensation information of the generator set at the target moment according to the target rotating speed and the plurality of first rotating speeds comprises the following steps:
determining the residual variation of the generator set according to the target rotating speed and a first target rotating speed in a plurality of first rotating speeds, wherein the first target rotating speed is the rotating speed of the generator set at a first moment, and the first moment is the moment when the generator set carries out first frequency modulation;
according to the residual variation and the target rotating speed, frequency modulation compensation information of the target moment of the generator set is determined;
the determining the residual variation of the generator set according to the target rotating speed and the first target rotating speeds in the plurality of first rotating speeds comprises:
determining a time length to be modulated of a first frequency modulation according to the first time, the target time and the first frequency modulation time length, wherein the first frequency modulation time length is a time length determined by the corresponding relation of the first target rotating speed according to the preset frequency modulation time;
determining a first frequency modulation rotation speed to be modulated according to the first target rotation speed, the target rotation speed and a first frequency modulation rotation speed, wherein the first frequency modulation rotation speed is a corresponding rotation speed determined by the first target rotation speed according to a preset frequency modulation time corresponding relation;
determining the residual variation of the generator set according to the duration to be modulated and the rotating speed to be modulated;
and determining the frequency modulation compensation information of the target moment of the generator set according to the residual variation and the target rotating speed comprises the following steps:
determining a target frequency modulation duration and a target frequency modulation rotating speed corresponding to the target rotating speed according to a preset frequency modulation time corresponding relation;
and determining the frequency modulation compensation information of the generator set at the target moment according to the target frequency modulation time length, the target frequency modulation rotating speed and the residual variation.
2. The method of tuning of claim 1, wherein the determining that the genset is at the first tuning comprises:
and determining that the generator set is in the first frequency modulation process according to the target rotating speed and the first rotating speeds.
3. The method of tuning of claim 2, wherein determining that the genset is at the first tuning based on the target rotational speed and the plurality of first rotational speeds comprises:
determining a first moment when the generator set performs the first frequency modulation according to the first rotating speeds;
determining a first frequency modulation duration corresponding to a first target rotating speed according to a preset frequency modulation time corresponding relation, wherein the first target rotating speed is the rotating speed of the generator set at the first moment;
and determining that the generator set is in the first frequency modulation process according to the first time, the target time and the first frequency modulation time.
4. The method of tuning of claim 2, wherein determining that the genset is at the first tuning based on the target rotational speed and the plurality of first rotational speeds comprises:
determining a first moment when the generator set performs the first frequency modulation according to the first rotating speeds;
determining a first frequency modulation rotating speed corresponding to a first target rotating speed according to a preset frequency modulation time corresponding relation, wherein the first target rotating speed is the rotating speed of the generator set at the first moment;
and determining that the generator set is in the first frequency modulation process according to the first target rotating speed, the target rotating speed and the first frequency modulation rotating speed.
5. A frequency modulation apparatus, said apparatus comprising:
the system comprises an acquisition module, a control module and a control module, wherein the acquisition module is used for acquiring a target rotating speed of a generator set at a target moment and a plurality of first rotating speeds in a target time period, and the target time period is a time period comprising the target moment;
the determining module is used for determining frequency modulation compensation information of the generator set at a target moment according to the target rotating speed and the plurality of first rotating speeds under the condition that the generator set is in the process of first frequency modulation;
the frequency modulation module is used for carrying out primary frequency modulation on the generator set according to the frequency modulation compensation information;
the determining module includes:
a seventh determining submodule, configured to determine a remaining variable quantity of the generator set according to the target rotational speed and a first target rotational speed among the plurality of first rotational speeds, where the first target rotational speed is a rotational speed of the generator set at a first moment, and the first moment is a moment when the generator set performs the first frequency modulation;
an eighth determining submodule, configured to determine frequency modulation compensation information of the target moment of the generator set according to the residual variation and the target rotational speed;
the seventh determining submodule is used for determining a duration to be modulated of a first frequency modulation according to the first moment, the target moment and the first frequency modulation duration, wherein the first frequency modulation duration is a corresponding duration determined by the first target rotating speed according to a preset corresponding relation of frequency modulation time; determining a first frequency modulation rotation speed to be modulated according to the first target rotation speed, the target rotation speed and a first frequency modulation rotation speed, wherein the first frequency modulation rotation speed is a corresponding rotation speed determined by the first target rotation speed according to a preset frequency modulation time corresponding relation; determining the residual variation of the generator set according to the duration to be modulated and the rotating speed to be modulated;
the eighth determining submodule is used for determining a target frequency modulation duration and a target frequency modulation rotating speed corresponding to the target rotating speed according to a preset frequency modulation time corresponding relation; and determining the frequency modulation compensation information of the generator set at the target moment according to the target frequency modulation time length, the target frequency modulation rotating speed and the residual variation.
6. A frequency modulation apparatus as defined in claim 5, wherein,
the determining module is used for determining the process that the generator set is in the first frequency modulation according to the target rotating speed and the first rotating speeds.
7. The frequency modulation device of claim 6, wherein the determining means comprises:
the first determining submodule is used for determining a first moment when the generator set carries out the first frequency modulation according to a plurality of first rotating speeds;
the second determining submodule is used for determining a first frequency modulation duration corresponding to a first target rotating speed according to a preset frequency modulation time corresponding relation, wherein the first target rotating speed is the rotating speed of the generator set at the first moment;
and the third determining submodule is used for determining the process of the generator set in the first frequency modulation according to the first moment, the target moment and the first frequency modulation duration.
8. The frequency modulation device of claim 6, wherein the determining means comprises:
a fourth determining submodule, configured to determine a first moment when the generator set performs the first frequency modulation according to a plurality of the first rotational speeds;
a fifth determining submodule, configured to determine a first fm rotational speed corresponding to a first target rotational speed according to a preset fm time correspondence, where the first target rotational speed is a rotational speed of the generator set at the first moment;
and the sixth determining submodule is used for determining the process that the generator set is in the first frequency modulation according to the first target rotating speed, the target rotating speed and the first frequency modulation rotating speed.
9. A non-transitory computer readable storage medium having stored thereon a computer program, characterized in that the program when executed by a processor implements the steps of the frequency modulation method according to any of claims 1-4.
10. An electronic device, comprising:
a memory having a computer program stored thereon;
a processor for executing the computer program in the memory to carry out the steps of the frequency modulation method according to any one of claims 1-4.
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