CN110365028A - A kind of primary frequency modulation influences the judgment method of oscillation of power - Google Patents
A kind of primary frequency modulation influences the judgment method of oscillation of power Download PDFInfo
- Publication number
- CN110365028A CN110365028A CN201910578103.9A CN201910578103A CN110365028A CN 110365028 A CN110365028 A CN 110365028A CN 201910578103 A CN201910578103 A CN 201910578103A CN 110365028 A CN110365028 A CN 110365028A
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- Prior art keywords
- power
- oscillation
- frequency
- governor
- frequency modulation
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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
Abstract
The present invention relates to the judgment methods that a kind of primary frequency modulation influences oscillation of power, acquire revolving speed/frequency of accurate generator, governor instruction, the signal of power, then maximum value, minimum value and the deviation in a cycle are calculated, then calculates maximum value, minimum value and the deviation in second period.Obtain the oscillation of power as caused by primary frequency modulation whether occurs by being judged the deviation etc. in two periods simultaneously.The present invention can online real-time judge primary frequency modulation whether cause the method for oscillation of power, and then quick prompt operations staff's relevant issues, take timely measure.
Description
Technical field
The present invention relates to power plant electrical field, especially a kind of primary frequency modulation influences the judgment method of oscillation of power.
Background technique
Since power grid has generating set primary frequency regulation stringenter examination, power plant is often tended to primary frequency modulation
Parameter setting is larger, to meet Performance Assessment requirement.But the larger primary frequency modulation that may also lead to of parameter is in certain specific operations
Under unstable power grid is caused to vibrate.
Prior art, which is concentrated mainly on, reduces the negative damping aspect that primary frequency modulation may provide, and is unable to real-time online and sentences
Whether the oscillation of off line group is caused by primary frequency function.
Summary of the invention
In view of this, the purpose of the present invention is to propose to the judgment method that a kind of primary frequency modulation influences oscillation of power, Ke Yi
Whether line real-time judge primary frequency modulation causes the method for oscillation of power, and then quick prompt operations staff's relevant issues, adopts in time
Take measure.
The present invention is realized using following scheme: a kind of primary frequency modulation influences the judgment method of oscillation of power, specifically include with
Lower step:
Step S1: the frequency of accurate generator is acquired, governor instructs and the signal of power；
Step S2: the rated value of frequency, governor instruction and power is respectively adopted as base value, and by these signals
Conversion is per unit value；
Step S3: to the per unit value of frequency, governor instruction and power in first time cycle it is maximum most
Small value is analyzed, and frequency maximin is stored inThe corresponding moment is stored inIt adjusts
Fast device instruction maximin is stored inThe corresponding moment is stored inPower minimax
Value is stored inThe corresponding moment is stored in
Step S4: the deviation of frequency, governor instruction and power in first time cycle of calculating, respectively
Step S5: instructing the frequency in second time cycle, governor and the deviation of power, carries out same
Δ F is calculated2、ΔG2、ΔP2；
Step S6: if the instruction of frequency, governor and power this three groups of signals within two time cycles, any one
Signal delta F1With Δ F2、ΔG1With Δ G2、ΔP1With Δ P2Deviation twice be both greater than corresponding predetermined threshold level, then prompt to transport
There may be oscillations for administrative staff's unit, and start subsequent judgement, enter step S7；Otherwise return step S3；
Step S7: judge whether to meet
In at least two, if satisfied, being then judged as oscillation of power caused by primary frequency modulation.
Further, step S1 further includes being filtered to collected signal, to ensure the quality of data and letter
It makes an uproar ratio.
Further, the frequency can replace with revolving speed.
Further, first time cycle and second time cycle are 3s.
Compared with prior art, the invention has the following beneficial effects: the present invention can real-time judge primary frequency modulation be online
The no method for causing oscillation of power, and then quick prompt operations staff's relevant issues, take timely measure.Side of the invention simultaneously
Method is relatively simple, can be applied in conjunction with Power Plant DCS equipment.
Detailed description of the invention
Fig. 1 is the workflow schematic diagram of the embodiment of the present invention.
Fig. 2 is the working condition when unit of the embodiment of the present invention does not vibrate.
Fig. 3 is the working condition when unit vibrates of the embodiment of the present invention.
Specific embodiment
The present invention will be further described with reference to the accompanying drawings and embodiments.
It is noted that described further below be all exemplary, it is intended to provide further instruction to the application.Unless another
It indicates, all technical and scientific terms used herein has usual with the application person of an ordinary skill in the technical field
The identical meanings of understanding.
It should be noted that term used herein above is merely to describe specific embodiment, and be not intended to restricted root
According to the illustrative embodiments of the application.As used herein, unless the context clearly indicates otherwise, otherwise singular
Also it is intended to include plural form, additionally, it should be understood that, when in the present specification using term "comprising" and/or " packet
Include " when, indicate existing characteristics, step, operation, device, component and/or their combination.
As shown in Figure 1, present embodiments providing a kind of primary frequency modulation influences the judgment method of oscillation of power, specifically include with
Lower step:
Step S1: the frequency of accurate generator is acquired, governor instructs and the signal of power；
Step S2: the rated value of frequency, governor instruction and power is respectively adopted as base value, and by these signals
Conversion is per unit value；
Step S3: to the per unit value of frequency, governor instruction and power in first time cycle it is maximum most
Small value is analyzed, and frequency maximin is stored inThe corresponding moment is stored inIt adjusts
Fast device instruction maximin is stored inThe corresponding moment is stored inPower minimax
Value is stored inThe corresponding moment is stored in
Step S4: the deviation of frequency, governor instruction and power in first time cycle of calculating, respectively
Step S5: instructing the frequency in second time cycle, governor and the deviation of power, carries out same
Δ F is calculated2、ΔG2、ΔP2；
Step S6: if the instruction of frequency, governor and power this three groups of signals within two time cycles, any one
Signal delta F1With Δ F2、ΔG1With Δ G2、ΔP1With Δ P2Deviation twice be both greater than corresponding predetermined threshold level, then prompt to transport
There may be oscillations for administrative staff's unit, and start subsequent judgement, enter step S7；Otherwise return step S3；
Step S7: judge whether to meet
In at least two, if satisfied, being then judged as oscillation of power caused by primary frequency modulation.
In the present embodiment, step S1 further includes being filtered to collected signal, to ensure the quality of data
And signal-to-noise ratio.
In the present embodiment, the frequency can replace with revolving speed.
In the present embodiment, first time cycle and second time cycle are 3s.
In the present embodiment, when not vibrating, judge that process loops to determine always the frequency of every 3s, governor instruction
And power, as shown in Figure 2.When oscillation is taking place, power and frequency change rate are more than threshold value, method to power and frequency most
The sequencing of big minimum value is judged, if the maximin that the maximin for meeting power is later than frequency respectively goes out
Existing, then judgement is that primary frequency modulation causes unit oscillation.
It should be understood by those skilled in the art that, embodiments herein can provide as method, system or computer program
Product.Therefore, complete hardware embodiment, complete software embodiment or reality combining software and hardware aspects can be used in the application
Apply the form of example.Moreover, it wherein includes the computer of computer usable program code that the application, which can be used in one or more,
The computer program implemented in usable storage medium (including but not limited to magnetic disk storage, CD-ROM, optical memory etc.) produces
The form of product.
The application is referring to method, the process of equipment (system) and computer program product according to the embodiment of the present application
Figure and/or block diagram describe.It should be understood that every one stream in flowchart and/or the block diagram can be realized by computer program instructions
The combination of process and/or box in journey and/or box and flowchart and/or the block diagram.It can provide these computer programs
Instruct the processor of general purpose computer, special purpose computer, Embedded Processor or other programmable data processing devices to produce
A raw machine, so that being generated by the instruction that computer or the processor of other programmable data processing devices execute for real
The device for the function of being specified in present one or more flows of the flowchart and/or one or more blocks of the block diagram.
These computer program instructions, which may also be stored in, is able to guide computer or other programmable data processing devices with spy
Determine in the computer-readable memory that mode works, so that it includes referring to that instruction stored in the computer readable memory, which generates,
Enable the manufacture of device, the command device realize in one box of one or more flows of the flowchart and/or block diagram or
The function of being specified in multiple boxes.
These computer program instructions also can be loaded onto a computer or other programmable data processing device, so that counting
Series of operation steps are executed on calculation machine or other programmable devices to generate computer implemented processing, thus in computer or
The instruction executed on other programmable devices is provided for realizing in one or more flows of the flowchart and/or block diagram one
The step of function of being specified in a box or multiple boxes.
The above described is only a preferred embodiment of the present invention, being not that the invention has other forms of limitations, appoint
What those skilled in the art changed or be modified as possibly also with the technology contents of the disclosure above equivalent variations etc.
Imitate embodiment.But without departing from the technical solutions of the present invention, according to the technical essence of the invention to above embodiments institute
Any simple modification, equivalent variations and the remodeling made, still fall within the protection scope of technical solution of the present invention.
Claims (4)
1. the judgment method that a kind of primary frequency modulation influences oscillation of power, which comprises the following steps:
Step S1: the frequency of accurate generator is acquired, governor instructs and the signal of power；
Step S2: the rated value that frequency, governor instruction and power is respectively adopted is converted as base value, and by these signals
For per unit value；
Step S3: instructing the frequency in first time cycle, governor and the maximin of the per unit value of power
It is analyzed, frequency maximin is stored inThe corresponding moment is stored inGovernor
Instruction maximin is stored inThe corresponding moment is stored inThe storage of power maximin
It is stored inThe corresponding moment is stored in
Step S4: the deviation of frequency, governor instruction and power in first time cycle of calculating, respectively
Step S5: instructing the frequency in second time cycle, governor and the deviation of power, is similarly calculated
Obtain Δ F2、ΔG2、ΔP2；
Step S6: if the instruction of frequency, governor and power this three groups of signals within two time cycles, any signal
ΔF1With Δ F2、ΔG1With Δ G2、ΔP1With Δ P2Deviation twice be both greater than corresponding predetermined threshold level, then prompt operation people
There may be oscillations for member's unit, and start subsequent judgement, enter step S7；Otherwise return step S3；
Step S7: judge whether to meet
In at least two, if satisfied, being then judged as oscillation of power caused by primary frequency modulation.
2. the judgment method that a kind of primary frequency modulation according to claim 1 influences oscillation of power, which is characterized in that step S1
It further include being filtered to collected signal, to ensure the quality of data and signal-to-noise ratio.
3. the judgment method that a kind of primary frequency modulation according to claim 1 influences oscillation of power, which is characterized in that the frequency
Rate can replace with revolving speed.
4. the judgment method that a kind of primary frequency modulation according to claim 1 influences oscillation of power, which is characterized in that described the
One time cycle and second time cycle are 3s.
Priority Applications (1)
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| CN201910578103.9A CN110365028B (en) | 2019-06-28 | 2019-06-28 | Method for judging influence of primary frequency modulation on power oscillation |
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| CN201910578103.9A CN110365028B (en) | 2019-06-28 | 2019-06-28 | Method for judging influence of primary frequency modulation on power oscillation |
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Cited By (2)
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| CN110707731A (en) * | 2019-11-22 | 2020-01-17 | 润电能源科学技术有限公司 | Method, device and equipment for inhibiting active power oscillation of thermal power generating unit |
| CN112751347A (en) * | 2020-12-30 | 2021-05-04 | 国网河北省电力有限公司电力科学研究院 | Low-frequency oscillation control method and device participated by steam turbine regulating system |
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| CN110365028B (en) | 2021-01-29 |
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