CN113418663A - Hydraulic turbine governor hydraulic system leakage detection method - Google Patents
Hydraulic turbine governor hydraulic system leakage detection method Download PDFInfo
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- CN113418663A CN113418663A CN202011620147.2A CN202011620147A CN113418663A CN 113418663 A CN113418663 A CN 113418663A CN 202011620147 A CN202011620147 A CN 202011620147A CN 113418663 A CN113418663 A CN 113418663A
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- 238000001514 detection method Methods 0.000 title claims abstract description 33
- 239000010720 hydraulic oil Substances 0.000 claims abstract description 28
- 239000003921 oil Substances 0.000 claims abstract description 25
- 238000004146 energy storage Methods 0.000 claims abstract description 22
- 230000009467 reduction Effects 0.000 claims abstract description 12
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 6
- 238000012544 monitoring process Methods 0.000 claims abstract description 4
- 238000000034 method Methods 0.000 claims description 24
- 230000008569 process Effects 0.000 claims description 24
- ZZUFCTLCJUWOSV-UHFFFAOYSA-N furosemide Chemical compound C1=C(Cl)C(S(=O)(=O)N)=CC(C(O)=O)=C1NCC1=CC=CO1 ZZUFCTLCJUWOSV-UHFFFAOYSA-N 0.000 claims 2
- 230000009471 action Effects 0.000 abstract description 5
- 230000032683 aging Effects 0.000 description 2
- 238000012423 maintenance Methods 0.000 description 2
- 230000004075 alteration Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000002650 habitual effect Effects 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000000737 periodic effect Effects 0.000 description 1
- 238000005086 pumping Methods 0.000 description 1
- 238000011897 real-time detection Methods 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M3/00—Investigating fluid-tightness of structures
- G01M3/02—Investigating fluid-tightness of structures by using fluid or vacuum
- G01M3/26—Investigating fluid-tightness of structures by using fluid or vacuum by measuring rate of loss or gain of fluid, e.g. by pressure-responsive devices, by flow detectors
Abstract
The invention discloses a hydraulic system leakage detection method of a hydraulic turbine governor, which is used for monitoring the self-loss condition of the hydraulic system of the governor in a period of energy storage when no external energy storage input and output exists, wherein the external energy storage input indicates whether an oil pump motor is started to work or not, and the judgment is carried out according to whether the hydraulic oil pressure rises or not; the external energy storage output indicates whether a hydraulic system of the speed regulator has control output or not, and is judged by whether the opening of a guide vane of the water turbine is changed or not; the loss degree of the energy storage of the hydraulic system is expressed by the reduction rate of the pressure value of the hydraulic oil. The leakage detection method for the hydraulic system of the hydraulic turbine governor fully utilizes the characteristic of intermittent action of the hydraulic system of the governor, the ratio of the silent time of the hydraulic system can reach more than 90 percent, namely, an oil pump motor is not started and the hydraulic system is not controlled to output, so that whether the hydraulic system of the governor leaks or not can be detected in real time on line, and the blank is filled.
Description
Technical Field
The invention relates to the technical field of hydroelectric generating sets, in particular to a hydraulic system leakage detection method for a hydraulic turbine governor.
Background
At present, hydraulic speed regulators are used in most hydroelectric generating sets of hydropower stations, energy storage of a hydraulic system is realized by generating hydraulic oil pressure through intermittent short-time oil pumping action of an oil pump motor, the hydraulic oil pressure of the hydraulic system is kept stable in a narrow range for a long time, and then the opening action of guide vanes of a water turbine is controlled by utilizing the energy output stored in the hydraulic system, so that the frequency stability and the active load regulation of the hydroelectric generating sets are realized.
In order to meet the control requirement of the water turbine generator set in a hydraulic system of the speed regulator, the hydraulic system is provided with an actuating cylinder and a hydraulic control valve, and hydraulic oil on one side of a valve core of the hydraulic system is pressurized while hydraulic oil on the other side of the valve core of the hydraulic system is unpressurized; if the case is because of frequent wearing and tearing or ageing leakproofness variation, hydraulic oil can leak the one side of no pressure from the one side of having pressure automatically through the case, arouse the self-loss of hydraulic system stored energy, can make the oil pump motor of speed regulator frequently start like this, not only can increase power consumption, shorten oil pump motor life, still can make hydraulic oil temperature rise, accelerate the ageing of hydraulic system internal seal rubber, it is serious because hydraulic system leaks simultaneously probably, can't rely on hydraulic system energy storage self-closing hydraulic turbine stator and cause huge risk when the power station loses electricity. Therefore, real-time detection of governor hydraulic system leakage is necessary.
Because the valve core is sealed in the metal structure, the leakage of the hydraulic oil cannot be directly seen, and the sensor cannot be directly installed for detection, and generally the detection can be carried out only in an indirect mode.
At present, many small and medium-sized hydropower stations do not pay attention to the leakage problem of a hydraulic system of a hydraulic governor, and the leakage problem may be related to the fact that no good detection means exists, so that an oil pump motor on the governor needs to be replaced frequently, and a habitual thinking of periodic replacement is formed. Some power stations with better management adopt a coarser mode, and are mainly judged by observing the frequency degree of the starting of an oil pump motor of a speed regulator by a power station attendant, but the problem is that the starting of the oil pump motor is very frequent when a hydraulic generator set is started, stopped and normally regulates load, so that the power station attendant often has misjudgment and cannot know the leakage degree, and the power station attendant is difficult to stop for overhauling due to the lack of reliable data support.
Disclosure of Invention
The invention aims to provide a hydraulic system leakage detection method for a hydraulic turbine governor, which aims to solve the problems in the background technology.
In order to achieve the purpose, the invention provides the following technical scheme: a hydraulic system leakage detection method of a hydraulic turbine governor is used for monitoring the self-loss condition of the hydraulic system of the governor in a period of energy storage when external energy storage input and output do not exist, the external energy storage input indicates whether an oil pump motor starts to work or not, and the judgment is carried out according to whether the hydraulic oil pressure rises or not; the external energy storage output indicates whether a hydraulic system of the speed regulator has control output or not, and is judged by whether the opening of a guide vane of the water turbine is changed or not; the loss degree of the energy storage of the hydraulic system is represented by the reduction rate of the pressure value of the hydraulic oil;
the steps of the leak detection method are as follows:
s1, setting a process starting time interval T, judging the process starting time T is up, and entering an oil regulator oil pump motor whether a starting judgment program exists recently after the process starting time T is determined;
s2, if the oil pump motor of the oil regulator is not started recently, entering a speed regulator hydraulic system control recent output judgment program;
and S3, judging whether the pressure value of the hydraulic oil in the previous process is different from the pressure value of the hydraulic oil in the current process or not/whether the pressure value of the hydraulic oil in the current process is greater than the reduction rate of the pressure value or not if the hydraulic system of the speed regulator does not output the pressure recently, and if the pressure value is greater than the reduction rate of the pressure value, continuously satisfying the condition for times plus 1 in the process execution.
Preferably, the set flow starting time interval T is used for eliminating calculation interference caused by instantaneous jitter of a real-time pressure value of the hydraulic system.
Preferably, in the leakage detection method, the establishment that the process continuously meets the condition number criterion N & gt 2 is to further confirm the occurrence of the leakage of the hydraulic system through the continuity of the pressure drop of the hydraulic oil.
Compared with the prior art, the invention has the beneficial effects that: the leakage detection method for the hydraulic system of the hydraulic turbine governor fully utilizes the characteristic of intermittent action of the hydraulic system of the governor, the ratio of the silent time of the hydraulic system can reach more than 90 percent, namely, an oil pump motor is not started and the hydraulic system is not controlled to output, so that whether the hydraulic system of the governor leaks or not can be detected on line in real time, and the blank is filled;
the leakage detection method for the hydraulic system of the hydraulic turbine governor can detect the leakage degree of the hydraulic system of the governor in real time: eta/T, which provides decision basis for stopping maintenance;
according to the hydraulic system leakage detection method for the hydraulic turbine governor, the sensor of the hydraulic system of the governor is fully utilized for online detection, no additional detection equipment is needed, and no intentional halt detection is needed;
according to the hydraulic system leakage detection method for the hydraulic turbine governor, the flow starting time interval T is set, and calculation interference caused by instantaneous jitter of a real-time pressure value of a hydraulic system is eliminated;
according to the hydraulic system leakage detection method for the hydraulic turbine governor, the establishment that the flow continuously meets the condition number criterion N is larger than or equal to 2 is to further confirm the occurrence of hydraulic system leakage through the continuity of hydraulic oil pressure reduction, so that misjudgment is avoided.
Drawings
Fig. 1 is a schematic diagram of the working flow of the hydraulic system leakage detection method of the hydraulic turbine governor according to the present invention.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Referring to fig. 1, the present invention provides a technical solution: a hydraulic system leakage detection method of a hydraulic turbine governor is used for monitoring the self-loss condition of the hydraulic system of the governor in a period of energy storage when no external energy storage input and output exists, the external energy storage input indicates whether an oil pump motor is started to work or not, and the judgment is carried out according to whether the hydraulic oil pressure rises or not; the external energy storage output indicates whether a hydraulic system of the speed regulator has control output or not, and is judged by whether the opening of a guide vane of the water turbine is changed or not; the loss degree of the energy storage of the hydraulic system is represented by the reduction rate of the pressure value of the hydraulic oil;
the steps of the leak detection method are as follows:
s1, setting a process starting time interval T, judging the process starting time T is up, and entering an oil regulator oil pump motor whether a starting judgment program exists recently after the process starting time T is determined;
s2, if the oil pump motor of the oil regulator is not started recently, entering a speed regulator hydraulic system control recent output judgment program;
s3, judging whether the pressure value of the hydraulic oil in the previous process is different from the pressure value of the hydraulic oil in the current process or not/whether the pressure value of the hydraulic oil in the current process is greater than the reduction rate of the pressure value or not if the hydraulic system of the speed regulator controls that no output exists recently, and if the pressure value is greater than the reduction rate of the pressure value, continuously satisfying the condition for times plus 1 in the process execution;
setting a process starting time interval T for eliminating calculation interference caused by instantaneous jitter of a real-time pressure value of a hydraulic system;
the leakage detection method has the advantages that the establishment that the flow continuously meets the condition number criterion N is larger than or equal to 2, the leakage of the hydraulic system is further confirmed through the continuity of the pressure reduction of the hydraulic oil, the misjudgment is avoided, the sensor of the hydraulic system of the speed regulator is fully utilized for online detection, no additional detection equipment is needed, the deliberate halt detection is not needed, the leakage degree eta/T of the hydraulic system of the speed regulator can be detected in real time, and a decision basis is provided for the halt maintenance; the intermittent action characteristic of the speed regulator hydraulic system is fully utilized, whether the speed regulator hydraulic system leaks or not can be detected on line in real time, and the blank is filled.
Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.
Claims (3)
1. A hydraulic governor hydraulic system leakage detection method is characterized in that: the leakage detection method is used for monitoring the self-loss condition of the speed regulator hydraulic system in a period of energy storage when no external energy storage input and output exists, the external energy storage input indicates whether an oil pump motor starts to work or not, and the judgment is carried out according to whether the hydraulic oil pressure rises or not; the external energy storage output indicates whether a hydraulic system of the speed regulator has control output or not, and is judged by whether the opening of a guide vane of the water turbine is changed or not; the loss degree of the energy storage of the hydraulic system is represented by the reduction rate of the pressure value of the hydraulic oil;
the steps of the leak detection method are as follows:
s1, setting a process starting time interval T, judging the process starting time T is up, and entering an oil regulator oil pump motor whether a starting judgment program exists recently after the process starting time T is determined;
s2, if the oil pump motor of the oil regulator is not started recently, entering a speed regulator hydraulic system control recent output judgment program;
and S3, judging whether the pressure value of the hydraulic oil in the previous process is different from the pressure value of the hydraulic oil in the current process or not/whether the pressure value of the hydraulic oil in the current process is greater than the reduction rate of the pressure value or not if the hydraulic system of the speed regulator does not output the pressure recently, and if the pressure value is greater than the reduction rate of the pressure value, continuously satisfying the condition for times plus 1 in the process execution.
2. The hydro governor hydraulic system leak detection method of claim 1, further comprising: and setting a flow starting time interval T for eliminating calculation interference caused by instantaneous jitter of a real-time pressure value of the hydraulic system.
3. The hydro governor hydraulic system leak detection method of claim 1, further comprising: according to the leakage detection method, the establishment that the process continuously meets the condition number criterion N is larger than or equal to 2 is to further confirm the leakage of the hydraulic system through the continuity of the pressure drop of the hydraulic oil.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011620147.2A CN113418663B (en) | 2020-12-31 | 2020-12-31 | Leakage detection method for hydraulic system of hydraulic turbine governor |
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| CN202011620147.2A CN113418663B (en) | 2020-12-31 | 2020-12-31 | Leakage detection method for hydraulic system of hydraulic turbine governor |
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| CN113418663A true CN113418663A (en) | 2021-09-21 |
| CN113418663B CN113418663B (en) | 2024-05-03 |
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Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102636321A (en) * | 2012-04-12 | 2012-08-15 | 三一重型装备有限公司 | Leakage diagnostic system and method of hydraulic bracket as well as hydraulic bracket |
| CN103452746A (en) * | 2013-07-31 | 2013-12-18 | 国家电网公司 | Hydraulic turbine governor out-of-control signal diagnosis and control methods |
| CN104204544A (en) * | 2012-03-22 | 2014-12-10 | 卡特彼勒公司 | Hydraulic accumulator pre-charge pressure detection |
| CN104791187A (en) * | 2015-04-08 | 2015-07-22 | 武汉四创自动控制技术有限责任公司 | Water-turbine adjustment system and method capable of forecasting health status |
| US20170184138A1 (en) * | 2014-04-02 | 2017-06-29 | Sikorsky Aircraft Corporation | System and method for health monitoring of hydraulic systems |
| CN110696804A (en) * | 2019-11-14 | 2020-01-17 | 中车株洲电力机车有限公司 | Leakage detection method and device for brake system |
| CN111521328A (en) * | 2020-05-30 | 2020-08-11 | 华能澜沧江水电股份有限公司 | Method for detecting leakage fault of hydraulic system of speed regulator of generator set |
| CN111536104A (en) * | 2020-05-18 | 2020-08-14 | 湖北汽车工业学院 | Cab suspension hydraulic seal detection system and method |
-
2020
- 2020-12-31 CN CN202011620147.2A patent/CN113418663B/en active Active
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104204544A (en) * | 2012-03-22 | 2014-12-10 | 卡特彼勒公司 | Hydraulic accumulator pre-charge pressure detection |
| CN102636321A (en) * | 2012-04-12 | 2012-08-15 | 三一重型装备有限公司 | Leakage diagnostic system and method of hydraulic bracket as well as hydraulic bracket |
| CN103452746A (en) * | 2013-07-31 | 2013-12-18 | 国家电网公司 | Hydraulic turbine governor out-of-control signal diagnosis and control methods |
| US20170184138A1 (en) * | 2014-04-02 | 2017-06-29 | Sikorsky Aircraft Corporation | System and method for health monitoring of hydraulic systems |
| CN104791187A (en) * | 2015-04-08 | 2015-07-22 | 武汉四创自动控制技术有限责任公司 | Water-turbine adjustment system and method capable of forecasting health status |
| CN110696804A (en) * | 2019-11-14 | 2020-01-17 | 中车株洲电力机车有限公司 | Leakage detection method and device for brake system |
| CN111536104A (en) * | 2020-05-18 | 2020-08-14 | 湖北汽车工业学院 | Cab suspension hydraulic seal detection system and method |
| CN111521328A (en) * | 2020-05-30 | 2020-08-11 | 华能澜沧江水电股份有限公司 | Method for detecting leakage fault of hydraulic system of speed regulator of generator set |
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