CN106194570A - The method reducing the alert rate of Turbine Governor System Feedback of Power fault misdescription - Google Patents
The method reducing the alert rate of Turbine Governor System Feedback of Power fault misdescription Download PDFInfo
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- CN106194570A CN106194570A CN201610645717.0A CN201610645717A CN106194570A CN 106194570 A CN106194570 A CN 106194570A CN 201610645717 A CN201610645717 A CN 201610645717A CN 106194570 A CN106194570 A CN 106194570A
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- unit
- sampling
- power
- fault
- value
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Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F03—MACHINES OR ENGINES FOR LIQUIDS; WIND, SPRING, OR WEIGHT MOTORS; PRODUCING MECHANICAL POWER OR A REACTIVE PROPULSIVE THRUST, NOT OTHERWISE PROVIDED FOR
- F03B—MACHINES OR ENGINES FOR LIQUIDS
- F03B15/00—Controlling
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F05—INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF CLASSES F01-F04
- F05B—INDEXING SCHEME RELATING TO WIND, SPRING, WEIGHT, INERTIA OR LIKE MOTORS, TO MACHINES OR ENGINES FOR LIQUIDS COVERED BY SUBCLASSES F03B, F03D AND F03G
- F05B2270/00—Control
- F05B2270/10—Purpose of the control system
- F05B2270/1016—Purpose of the control system in variable speed operation
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E10/00—Energy generation through renewable energy sources
- Y02E10/20—Hydro energy
Abstract
The present invention relates to a kind of method reducing the alert rate of Turbine Governor System Feedback of Power fault misdescription, mainly by increasing unit frequency criterion in unit active power breakdown judge logic: when unit meritorious fluctuation sampled value reaches power transducer sampling more line value, unit frequency sampling is judged simultaneously, if machine class frequency varies more than machine class frequency change setting value within the sampling setting time, then it is considered as meritorious fluctuation, do not judge power transducer fault, if the change of machine class frequency changes setting value not less than machine class frequency within the sampling setting time, then judge power transducer sampling fault, unit gain merit closed loop regulation exit, it is switched to " aperture pattern " simultaneously.Thus effectively reduce the alert rate of governing system Feedback of Power fault misdescription, improve the stability of system.
Description
Technical field
The present invention relates to Water-Turbine Engine Adaption technology, be specifically related to a kind of Turbine Governor System Feedback of Power fault that reduces and miss
The method of alarm rate.
Background technology
In the running in power station, any link of power adjustments breaks down, and is likely to make the unit of operation to go out
There are unusual fluctuations in power, affects the stable operation of unit.Relatively conventional: the Hydraulic unit that hole two machine is arranged, Qi Zhongyi
Platform load rejection causes water hammer effect to cause an other unit load to fluctuate.
Especially for long diversion system, two mutual hydraulic loading cycle of unit of same Hydraulic unit are bigger.When wherein one
Platform unit tripping, stator quick closedown, the volute pressure of removal of load unit rises rapidly, and disturbed unit is owing to surge shaft is to water
The Absorption of hammer effect is not undergone mutation, but it is constant to carry out the water yield at diversion system, the feelings that removal of load unit water consumption reduces
Under condition, the head of disturbed unit will accumulate rising.The fluctuation that goes out directly affecting disturbed unit exceedes power transducer
Sampling more line value, governing system report power transducer fault.
At present, in most of Turbine Governor Systems, after receiving power transducer fault alarm, will automatically be switched to " aperture
Pattern ".So under aperture pattern, it is defaulted as the aperture before stable operation constant, owing to head accumulation raises, causes unit to go out
Power is continuously increased, it is possible that the faults such as unit overload, vibration increasing, system shakiness.
Summary of the invention
In place of it is an object of the invention to overcome the deficiencies in the prior art, it is provided that one not only improved unit operation stability but also
Can when machine unit speed regulating device Feedback of Power " real fault " method of timely action.
The purpose of the present invention is achieved through the following technical solutions.Reduce Turbine Governor System Feedback of Power fault misdescription
The method of alert rate, the steps include:
(1) by the method for data analysis, by unit active power normal fluctuation sampled value and unit active power fault
Sampled value makes a distinction；
(2) according to the static characteristic of governing system, Feedback of Power failure criterion increases frequency criterion；
(3) if unit meritorious fluctuation sampled value reaches power transducer sampling more line value, simultaneously to unit frequency sampling
Judge；
(4) according to step (3), if machine class frequency varies more than machine class frequency change setting value within the sampling setting time,
Then it is considered as meritorious fluctuation, power transducer fault-free；If machine class frequency changes not less than machine class frequency within the sampling setting time
Change setting value, then judge power transducer sample fault, unit gain merit closed loop regulate exit, be switched to " aperture pattern " simultaneously.
Further, described static characteristic refer to unit when generating operation mode stable operation, the frequency of unit is with load fluctuation
Fluctuation.
Further, described sampled value is the numerical value that the data of the power of the assembling unit or machine class frequency are acquired by governing system.
Further, described sampling more line value refers to can automatically identify when unit active power is sampled by governing system
The minima of power transducer sampling fault.
Further, the described sampling setting time is less than the sampling time of unit active power feedback fault alarm, and is more than
The servomotor dead time.
Further, described machine class frequency change setting value is carried out according to unit permanent speed regulation, power transducer sampling more line value
Calculate.
The present invention passes through to increase unit frequency criterion in unit active power breakdown judge logic, effectively reduces tune
The alert rate of speed system Feedback of Power fault misdescription, improves the stability of system.
Accompanying drawing explanation
Fig. 1 is Adaptive System of Water-Turbine Engine static characteristic graph of a relation.
Detailed description of the invention
Below by specific embodiment, the invention will be further described, reduces Turbine Governor System Feedback of Power fault
The method of false alarm rate, the steps include:
(1) the selected sampling setting time: the sampling time 50ms of unit active power feedback fault alarm, speed regulator relay
The device dead time is 120ms.According to selected principle, choose sampling and set the time as 100ms.
(2) selected machine class frequency change setting value Δ f: unit permanent speed regulation ep=4%, power transducer sampling more line value sets
Being set to the 10% of rated load, unit rated frequency is fr=50Hz.Then according to Adaptive System of Water-Turbine Engine static characteristic (such as Fig. 1 institute
Show) have:
Wherein, Δ P is power transducer sampling more line value, PrFor unit rated load in embodiment.
Can be calculated: class frequency change setting value Δ f=0.2Hz, for ensureing the susceptiveness of criterion, suitably leave and take the most abundant
Degree, chooses Δ f=0.1Hz.
When unit frequency fluctuation is in the range of 0.1Hz, governing system detection criteria, within 5 sampling setting time, detects
It is accumulated over 10%P to changed powerr, then power transducer fault is judged.Unit gain merit closed loop regulation exit, be switched to simultaneously
" aperture pattern ".
When unit frequency fluctuation within 10 sampling setting time, does not carry out merit more than 0.1Hz, governing system detection criteria
Rate sampling breakdown judge.
When power transducer measured value is more than 115%Pr, directly judge power transducer fault.Unit gain merit closed loop regulation
Exit, be switched to " aperture pattern " simultaneously.
By using the method to improve governing system Feedback of Power failure criterion, meet power grid accident and unit output quickly becomes
During change, emergent power transmitter erroneous judgement situation the most again.
Claims (6)
1. the method reducing the alert rate of Turbine Governor System Feedback of Power fault misdescription, it is characterised in that the steps include:
(1) by the method for data analysis, unit active power normal fluctuation sampled value is sampled with unit active power fault
Value makes a distinction；
(2) according to the static characteristic of governing system, Feedback of Power failure criterion increases frequency criterion；
(3) if unit meritorious fluctuation sampled value reaches power transducer sampling more line value, unit frequency sampling is carried out simultaneously
Judge；
(4) according to step (3), if machine class frequency varies more than machine class frequency change setting value within the sampling setting time, then regard
For meritorious fluctuation, power transducer fault-free；If the change of machine class frequency changes not less than machine class frequency within the sampling setting time
Setting value, then judge power transducer sample fault, unit gain merit closed loop regulation exit, be switched to " aperture pattern " simultaneously.
Method the most according to claim 1, it is characterised in that described static characteristic refers to that unit is in generating operation mode stable operation
Time, the frequency of unit fluctuates with load fluctuation.
Method the most according to claim 1, it is characterised in that described sampled value is that governing system is to the power of the assembling unit or unit
The numerical value that the data of frequency are acquired.
Method the most according to claim 1, it is characterised in that described sampling more line value is that governing system is to unit wattful power
When rate is sampled, it is possible to automatically identify the minima of power transducer sampling fault.
Method the most according to claim 1, it is characterised in that described sampling sets the time less than unit active power feedback
The sampling time of fault alarm, and more than the servomotor dead time.
Method the most according to claim 1, it is characterised in that it is poor that described machine class frequency change setting value is adjusted according to unit
Rate, power transducer sampling more line value calculates.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610645717.0A CN106194570A (en) | 2016-08-08 | 2016-08-08 | The method reducing the alert rate of Turbine Governor System Feedback of Power fault misdescription |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610645717.0A CN106194570A (en) | 2016-08-08 | 2016-08-08 | The method reducing the alert rate of Turbine Governor System Feedback of Power fault misdescription |
Publications (1)
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| CN106194570A true CN106194570A (en) | 2016-12-07 |
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| CN201610645717.0A Pending CN106194570A (en) | 2016-08-08 | 2016-08-08 | The method reducing the alert rate of Turbine Governor System Feedback of Power fault misdescription |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109340038A (en) * | 2018-09-14 | 2019-02-15 | 中国长江电力股份有限公司 | A kind of power soft fault judgment method based on the judgement of continuous slope change threshold |
| CN112666418A (en) * | 2021-01-14 | 2021-04-16 | 中国长江电力股份有限公司 | Power transmitter fault diagnosis method based on water head, opening and active power joint curve |
| CN114427511A (en) * | 2022-01-12 | 2022-05-03 | 中国长江电力股份有限公司 | Hydropower unit power feedback and main feedback signal fault cooperative judgment method |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS57163167A (en) * | 1981-03-31 | 1982-10-07 | Hitachi Ltd | Starting method for water turbine |
| CN105119543A (en) * | 2015-09-22 | 2015-12-02 | 东方电机控制设备有限公司 | Control method and system for far-end line load shedding of generator set speed regulation system |
-
2016
- 2016-08-08 CN CN201610645717.0A patent/CN106194570A/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS57163167A (en) * | 1981-03-31 | 1982-10-07 | Hitachi Ltd | Starting method for water turbine |
| CN105119543A (en) * | 2015-09-22 | 2015-12-02 | 东方电机控制设备有限公司 | Control method and system for far-end line load shedding of generator set speed regulation system |
Non-Patent Citations (2)
| Title |
|---|
| 吴家乐: "锦东水电厂机组有功功率波动事件原因分析与预防措施", 《陕西电力》 * |
| 苗天宇 等: "锦屏二级水电站负荷波动案例分析及防范措施", 《水电厂自动化》 * |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109340038A (en) * | 2018-09-14 | 2019-02-15 | 中国长江电力股份有限公司 | A kind of power soft fault judgment method based on the judgement of continuous slope change threshold |
| CN109340038B (en) * | 2018-09-14 | 2020-02-07 | 中国长江电力股份有限公司 | Power gradual change fault judgment method based on continuous slope change threshold judgment |
| CN112666418A (en) * | 2021-01-14 | 2021-04-16 | 中国长江电力股份有限公司 | Power transmitter fault diagnosis method based on water head, opening and active power joint curve |
| CN114427511A (en) * | 2022-01-12 | 2022-05-03 | 中国长江电力股份有限公司 | Hydropower unit power feedback and main feedback signal fault cooperative judgment method |
| CN114427511B (en) * | 2022-01-12 | 2023-07-14 | 中国长江电力股份有限公司 | Hydropower unit power feedback and main connection feedback signal fault collaborative judgment method |
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Application publication date: 20161207 |
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