CN109861298A - A method of it improving governor primary frequency modulation and acts qualification rate - Google Patents
A method of it improving governor primary frequency modulation and acts qualification rate Download PDFInfo
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- CN109861298A CN109861298A CN201910302277.2A CN201910302277A CN109861298A CN 109861298 A CN109861298 A CN 109861298A CN 201910302277 A CN201910302277 A CN 201910302277A CN 109861298 A CN109861298 A CN 109861298A
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- 238000000034 method Methods 0.000 title claims abstract description 14
- 238000005259 measurement Methods 0.000 claims abstract description 29
- 238000012360 testing method Methods 0.000 claims description 6
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Abstract
The invention belongs to governor frequency modulation technology fields, more particularly to a kind of method of raising governor primary frequency modulation movement qualification rate, primary frequency modulation dead zone is split up into upper dead zone and lower dead zone by the present invention, and precise frequency compensation is carried out to upper dead zone and lower dead zone respectively, the accuracy of governor primary frequency modulation dead zone setting is improved, to improve primary frequency modulation movement qualification rate.Step of the present invention is simple, only primary frequency modulation operating dead zone need to be divided into upper dead zone and lower dead zone in governor program and modify primary frequency modulation operating criterion expression formula, is not required to increase any hardware to governor, the governor effect poor for frequency-measurement accuracy is more preferable.
Description
Technical field
The invention belongs to governor frequency modulation technology fields, and in particular to a kind of raising governor primary frequency modulation movement qualification rate
Method.
Background technique
Primary frequency function is the basic function of governor, and according to relevant regulations, primary frequency modulation moves the setting of area's Hydropower Unit
For 0.05Hz, fired power generating unit is set as 0.033Hz, and judges after primary frequency modulation movement whether 1 minute device electricity meets and want
Seek the criterion qualified for governor movement.Due to only one numerical value of dead zone, then upper limit dead zone and lower limit dead zone are symmetrical, i.e.,
It when mains frequency is greater than 50.05Hz or is less than 49.95Hz, and is then power grid for fired power generating unit for Hydropower Unit
Frequency be greater than 50.033Hz or be less than 49.967Hz when, primary frequency modulation should act, 1 minute device electricity meet the requirements then this
Secondary primary frequency modulation movement is qualified.But there are certain deviations for governor frequency measurement, have at present significant portion governor using 1MHz with
Under counter frequency measurement, frequency measurement resolution ratio only reaches 0.0025Hz, if only simply hydroelectric units primary frequency modulation dead zone
It is set as 0.05Hz, then may causes primary frequency modulation that cannot correctly act because of frequency measurement somewhat deviation.Such as power grid actual frequency
For 50.05Hz, and it is 50.049Hz that governor, which measures the frequency come, although deviation only has the 0.001Hz of very little, primary frequency modulation
It will not act, such case is easier to occur in the not high situation of governor frequency measurement resolution ratio.By experiment, two governors are surveyed
Frequency hardware and the completely the same unit of software (the governor frequency measurement resolution ratio is better than 0.001Hz), the dead zone of setting is all
50.051Hz, two unit primary frequency modulations have all acted identical 170 times within identical a period of time, and identical at another section
Time in, 1 unit keeps the dead zone of 0.051Hz, another 1 unit the dead time be 0.052Hz after, keep 0.051Hz's
The unit primary frequency modulation in dead zone acts 232 times, and another unit that dead zone is changed to 0.052Hz then acts 182 times, improves
The value of 0.001Hz, action frequency reduce the amount of 50 times (21.6%).
Summary of the invention
To solve the above-mentioned problems, the present invention provides it is a kind of raising governor primary frequency modulation movement qualification rate method,
Specific technical solution is as follows:
A method of it improving governor primary frequency modulation and acts qualification rate, primary frequency modulation dead zone is divided into upper dead zone and lower dead
Area carries out precise frequency compensation to upper dead zone and lower dead zone respectively.
Preferably, comprising the following steps:
(1) high-precision frequency generator is used to issue frequency as lower dead zone test frequency fLSignal to governor, record
Governor stablizes the frequency values f that display is measuredL', and it is labeled as lower dead zone frequency measurement；
(2) high-precision frequency generator is used to issue frequency as upper dead zone test frequency fHSignal to governor, record
Governor stablizes the frequency values f that display is measuredH', and it is labeled as upper dead zone frequency measurement；
(3) according to above-mentioned lower dead zone frequency measurement fL' and upper dead zone frequency measurement fH' determine lower dead band value fxWith
Upper dead band value fs；
(4) according to lower dead band value fxWith upper dead band value fsDetermine lower dead area compensation value Δ fxWith upper dead area compensation value Δ fs；
(5) according to lower dead area compensation value Δ fxWith upper dead area compensation value Δ fsModify primary frequency modulation operating criterion.
Preferably, lower dead band value f in the step (3)xWith upper dead band value fsCalculation it is as follows:
fx=50-fL'； (1)
fs=| 50-fH'| (2)。
Preferably, lower dead area compensation value Δ f in the step (4)xWith upper dead area compensation value Δ fsCalculation it is as follows:
Δfx=-(F-fx)； (3)
Δfs=-(F-fs)； (4)
Wherein, F is dead zone setting value, and the primary frequency modulation operating dead zone setting value of Hydropower Unit is 0.05Hz, fired power generating unit
Primary frequency modulation operating dead zone setting value be 0.033Hz.
Preferably, modified primary frequency modulation operating criterion in the step (5) are as follows:
Wherein, f is governor real time frequency measurement value, and F is dead zone setting value, the primary frequency modulation operating dead zone of Hydropower Unit
Setting value is 0.05Hz, and the primary frequency modulation operating dead zone setting value of fired power generating unit is 0.033Hz.
Preferably, the precision of the high-precision frequency generator is at least up to 0.001Hz.
The invention has the benefit that primary frequency modulation dead zone is split up into upper dead zone and lower dead zone by the present invention, and right respectively
Upper dead zone and lower dead zone carry out precise frequency compensation, the accuracy of governor primary frequency modulation dead zone setting are improved, to improve
Primary frequency modulation acts qualification rate.Step of the present invention is simple, primary frequency modulation operating dead zone need to be only divided into governor program
Primary frequency modulation operating criterion expression formula is simultaneously modified in upper dead zone and lower dead zone, is not required to increase any hardware to governor, for frequency measurement
The poor governor effect of precision is more preferable.
Specific embodiment
In order to better understand the present invention, the present invention is further explained in the light of specific embodiments:
A method of it improving governor primary frequency modulation and acts qualification rate, primary frequency modulation dead zone is divided into upper dead zone and lower dead
Area carries out precise frequency compensation to upper dead zone and lower dead zone respectively.Specifically includes the following steps:
(1) high-precision frequency generator is used to issue frequency as lower dead zone test frequency fLSignal to governor, record
Governor stablizes the frequency values f that display is measuredL', and it is labeled as lower dead zone frequency measurement.For example, high-precision frequency generator
Issue fLFor=49.950Hz frequency signal to governor, governor measures lower dead zone frequency measurement fL'=49.949Hz, for
Frequency measurement resolution ratio is the governor of 0.0025Hz, and the frequency values theoretically measured are between 49.9475Hz to 49.9525Hz.
(2) high-precision frequency generator is used to issue frequency as upper dead zone test frequency fHSignal to governor, record
Governor stablizes the frequency values f that display is measuredH', and it is labeled as upper dead zone frequency measurement.For example, high-precision frequency generator
Issue fHFor=50.050Hz frequency signal to governor, governor measures dead zone frequency measurement fH'=50.049Hz, for
Frequency measurement resolution ratio is the governor of 0.0025Hz, and the frequency values theoretically measured are between 50.0475Hz to 50.0525Hz.
(3) according to above-mentioned lower dead zone frequency measurement fL' and upper dead zone frequency measurement fH' determine lower dead band value fxWith
Upper dead band value fs；Lower dead band value fxWith upper dead band value fsCalculation it is as follows:
fx=50-fL'； (1)
fs=| 50-fH'| (2)。
Such as this sentences Hydropower Unit, following dead zone frequency measurement fLDead band value f is then descended in '=49.949x=50-
49.949=0.051Hz, frequency measurement f in dead zone as aboveH'=50.049, then dead band value fs=| 50-50 | .0=49Hz.
0.049
(4) according to lower dead band value fxWith upper dead band value fsDetermine lower dead area compensation value Δ fxWith upper dead area compensation value Δ fs；Under
Dead area compensation value Δ fxWith upper dead area compensation value Δ fsCalculation it is as follows:
Δfx=-(F-fx)； (3)
Δfs=-(F-fs)； (4)
Wherein, F is dead zone setting value, and the primary frequency modulation operating dead zone setting value of Hydropower Unit is 0.05Hz, fired power generating unit
Primary frequency modulation operating dead zone setting value be 0.033Hz.
By taking Hydropower Unit as an example, if fx=0.051, fs=0.049, then:
Δfx=-(F-fx)=- (0.05-0.051)=0.001Hz；Δfs=-(F-fs)=- (0.05-0.049)=-
0.001Hz。
(5) according to lower dead area compensation value Δ fxWith upper dead area compensation value Δ fsModify primary frequency modulation operating criterion.Specifically:
To original primary frequency modulation operating criterion | f-50 | >=F modifies, modified primary frequency modulation operating criterion are as follows:
Wherein, f is governor real time frequency measurement value, and F is dead zone setting value, the primary frequency modulation operating dead zone of Hydropower Unit
Setting value is 0.05Hz, and the primary frequency modulation operating dead zone setting value of fired power generating unit is 0.033Hz.
By taking Hydropower Unit as an example, if Δ fx=0.001Hz, Δ fs=-0.001Hz；Modified criterion are as follows:
That is:
The present invention is not limited to above-described specific embodiment, and the foregoing is merely preferable case study on implementation of the invention
, it is not intended to limit the invention, any modification done within the spirit and principles of the present invention and changes equivalent replacement
Into etc., it should all be included in the protection scope of the present invention.
Claims (6)
1. a kind of method for improving governor primary frequency modulation movement qualification rate, it is characterised in that: primary frequency modulation dead zone to be divided into
Dead zone and lower dead zone carry out precise frequency compensation to upper dead zone and lower dead zone respectively.
2. a kind of method for improving governor primary frequency modulation movement qualification rate according to claim 1, it is characterised in that: packet
Include following steps:
(1) high-precision frequency generator is used to issue frequency as lower dead zone test frequency fLSignal to governor, record governor
Stablize the frequency values f that display is measuredL', and it is labeled as lower dead zone frequency measurement；
(2) high-precision frequency generator is used to issue frequency as upper dead zone test frequency fHSignal to governor, record governor
Stablize the frequency values f that display is measuredH', and it is labeled as upper dead zone frequency measurement；
(3) according to above-mentioned lower dead zone frequency measurement fL' and upper dead zone frequency measurement fH' determine lower dead band value fxWith it is upper dead
Zones values fs；
(4) according to lower dead band value fxWith upper dead band value fsDetermine lower dead area compensation value Δ fxWith upper dead area compensation value Δ fs；
(5) according to lower dead area compensation value Δ fxWith upper dead area compensation value Δ fsModify primary frequency modulation operating criterion.
3. a kind of method for improving governor primary frequency modulation movement qualification rate according to claim 2, it is characterised in that: institute
State lower dead band value f in step (3)xWith upper dead band value fsCalculation it is as follows:
fx=50-fL'； (1)
fs=| 50-fH'| (2)。
4. a kind of method for improving governor primary frequency modulation movement qualification rate according to claim 2, it is characterised in that: institute
State lower dead area compensation value Δ f in step (4)xWith upper dead area compensation value Δ fsCalculation it is as follows:
Δfx=-(F-fx)； (3)
Δfs=-(F-fs)； (4)
Wherein, F is dead zone setting value, and the primary frequency modulation operating dead zone setting value of Hydropower Unit is 0.05Hz, the one of fired power generating unit
Secondary frequency modulation operating dead zone setting value is 0.033Hz.
5. a kind of method for improving governor primary frequency modulation movement qualification rate according to claim 2, it is characterised in that: institute
State modified primary frequency modulation operating criterion in step (5) are as follows:
Wherein, f is governor real time frequency measurement value, and F is dead zone setting value, and the primary frequency modulation operating dead zone of Hydropower Unit is set
Value is 0.05Hz, and the primary frequency modulation operating dead zone setting value of fired power generating unit is 0.033Hz.
6. a kind of method for improving governor primary frequency modulation movement qualification rate according to claim 2, it is characterised in that: institute
The precision for stating high-precision frequency generator is at least up to 0.001Hz.
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112039087A (en) * | 2020-07-29 | 2020-12-04 | 大唐水电科学技术研究院有限公司 | Calculation method of primary frequency modulation theoretical electric quantity |
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Cited By (2)
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| CN112039087A (en) * | 2020-07-29 | 2020-12-04 | 大唐水电科学技术研究院有限公司 | Calculation method of primary frequency modulation theoretical electric quantity |
| CN112039087B (en) * | 2020-07-29 | 2022-08-26 | 大唐水电科学技术研究院有限公司 | Calculation method of primary frequency modulation theoretical electric quantity |
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