CN117032160A - Diagnosis and analysis method for main and auxiliary pumping faults of hydropower station speed regulator - Google Patents
Diagnosis and analysis method for main and auxiliary pumping faults of hydropower station speed regulator Download PDFInfo
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- 238000005086 pumping Methods 0.000 title claims abstract description 47
- 238000004458 analytical method Methods 0.000 title claims abstract description 15
- 238000003745 diagnosis Methods 0.000 title claims abstract description 13
- 238000006073 displacement reaction Methods 0.000 claims abstract description 26
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- 238000010248 power generation Methods 0.000 claims abstract description 6
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- G—PHYSICS
- G05—CONTROLLING; REGULATING
- G05B—CONTROL OR REGULATING SYSTEMS IN GENERAL; FUNCTIONAL ELEMENTS OF SUCH SYSTEMS; MONITORING OR TESTING ARRANGEMENTS FOR SUCH SYSTEMS OR ELEMENTS
- G05B23/00—Testing or monitoring of control systems or parts thereof
- G05B23/02—Electric testing or monitoring
- G05B23/0205—Electric testing or monitoring by means of a monitoring system capable of detecting and responding to faults
- G05B23/0208—Electric testing or monitoring by means of a monitoring system capable of detecting and responding to faults characterized by the configuration of the monitoring system
- G05B23/0213—Modular or universal configuration of the monitoring system, e.g. monitoring system having modules that may be combined to build monitoring program; monitoring system that can be applied to legacy systems; adaptable monitoring system; using different communication protocols
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- G—PHYSICS
- G05—CONTROLLING; REGULATING
- G05B—CONTROL OR REGULATING SYSTEMS IN GENERAL; FUNCTIONAL ELEMENTS OF SUCH SYSTEMS; MONITORING OR TESTING ARRANGEMENTS FOR SUCH SYSTEMS OR ELEMENTS
- G05B2219/00—Program-control systems
- G05B2219/20—Pc systems
- G05B2219/24—Pc safety
- G05B2219/24065—Real time diagnostics
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- 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
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Abstract
The invention discloses a diagnosis and analysis method for a main and auxiliary pumping fault of a hydropower station speed regulator, and belongs to the field of hydropower station speed regulator control systems. According to the fault phenomenon that the valve core moves back and forth in the opening direction and the closing direction during main and auxiliary drawing, the drawing fault is judged by collecting the displacement signal of the main and auxiliary valve core and the position signal of a unit breaker and setting an action threshold by utilizing the characteristic that the valve core alternates back and forth in the opening direction and the closing direction during main and auxiliary drawing during the grid-connected power generation state of the unit, and an alarm signal is sent timely. The method can automatically and rapidly diagnose the main-auxiliary pumping fault, and can select the redundant switching of the main controller and the auxiliary controller so as to rapidly recover the stability of the control system, prevent the expansion of accidents and ensure the safe and stable operation of the unit.
Description
Technical Field
The invention relates to the field of control systems of hydropower station speed regulators, in particular to a diagnosis and analysis method for a main and auxiliary pumping fault of a hydropower station speed regulator.
Background
The main and auxiliary pumping faults of the speed regulator of the hydroelectric generating set have more related variables, and relate to the instability of a hydraulic follow-up system and the frequent adjustment of closed loop (opening closed loop, frequency closed loop and power closed loop) control. The main and auxiliary pumping brings the consequences of frequent oiling, unstable opening, load fluctuation and the like of the oil pressure device. A plurality of hydropower stations have the problems of main distribution feedback disconnection and jump, so that the main distribution violent pumping under the power generation working condition causes large opening change, and further causes large-range disturbance of load, and the unit is forced to be stopped by accident.
Regarding the main-match pumping faults, a few documents are described and analyzed, and most documents only list some relevant factors for the main-match pumping and check the factors one by one, but the main-match pumping faults are only the post-fault treatment, so that the pre-prevention effect is difficult to realize. Aiming at the main and auxiliary pumping faults, a mature and perfect online fault diagnosis algorithm is not applied in the actual engineering, so that a speed regulator cannot automatically take fault response measures, manual intervention is needed, the optimal time for fault processing is delayed, and the risk of fault amplification exists. A diagnosis and analysis method for the main-auxiliary pumping faults of the hydropower station speed regulator is established, the main-auxiliary pumping faults are automatically and rapidly diagnosed, and redundant switching of the main controller and the auxiliary controller is selected, so that the method has important significance for rapidly recovering the stability of a control system, preventing the expansion of accidents and ensuring the safe and stable operation of a unit.
Disclosure of Invention
The invention aims to solve the problem of main and auxiliary pumping fault detection of a hydropower station speed regulator, and provides a diagnosis and analysis system and a method for the main and auxiliary pumping fault of the hydropower station speed regulator. The method can accurately detect the main and auxiliary pumping faults and alarm, and measures are taken to intervene to prevent further deterioration of the stability of the speed regulator system.
The technical scheme for solving the technical problems comprises the following steps: a diagnosis and analysis method for main and auxiliary pumping faults of a hydropower station speed regulator comprises the following steps:
step one: acquiring a main valve core displacement signal by using an analog quantity signal acquisition module;
step two: judging whether the unit is in a grid-connected power generation state or not: if the unit circuit breaker is put into operation, the signal acquired by the analog quantity signal acquisition module is 1, which represents the grid-connected state of the unit, and the main and auxiliary pumping fault judging function is put into operation, and the following steps are calculated; if the unit circuit breaker is disconnected, the signal acquired by the analog quantity signal acquisition module is 0, the unit is not in a grid-connected state, the main-match pumping fault judging function is exited, the calculation of the following steps is stopped, the Flag-open 1=0 and the Flag-close 1=0 involved in the following steps are reset to a timer;
step three: processing the displacement signal of the main valve core in an analog quantity signal acquisition module, and respectively recording code values of the main valve core at a full-open position, a full-closed position and a middle position:
the code value of the m-main valve core at the full-open position; the code value of the n-main valve core at the full-closing position;
the code value of the r-main valve core at the middle position; k-code value of valve core displacement when the main valve is opened or closed; a-relative value of spool displacement when the main valve is opened or closed.
When k > r, the main valve element is represented in the opening direction a= (k-r)/(m-r);
when k < r, it indicates that the main-valve element is in the closing direction a= (k-r)/(r-n);
when k=r, it means that the main-valve spool is in neutral position a=0;
flag-open=1 indicates the main-set on direction set, flag-open=0 indicates the main-set on direction set reset;
flag-close=1 indicates a main-configuration closing direction set, flag-close=0 indicates a main-configuration closing direction set reset;
flag-open 1=1 indicates that the master configuration is turned off to turn on, flag-open 1=0 indicates that the master configuration is turned off to turn on;
flag-close 1=1 indicates that the master configuration transitions from the on to the off direction, flag-close 1=0 indicates that the master configuration transitions from the on to the off direction and returns;
step four: setting a threshold value:
the x-main opening direction action threshold is used as a main opening direction jump fault condition, and is set by the site according to the characteristics of the speed regulator, so that the stable operation of the unit is required to be met;
-x-main-accessory closing direction action threshold, as a condition for main-accessory closing direction jump fault, set by site according to governor characteristics, required to meet the steady operation of the unit;
step five: if a > x, i.e. the main valve element moves in the opening direction, the main valve element opening direction is set Flag-open=1; if A < -x represents that the main valve core moves towards the closing direction, setting Flag-closing=1 in the main valve closing direction;
step six: if Flag-open=1 and a < -x, this indicates that the main valve element jumps from the opening direction to the closing direction. The main configuration jumps from the opening direction to the closing direction by Flag-close 1=1, the main configuration starts the direction by Flag-open=0, and the main configuration jumps from the closing direction to the opening direction by Flag-open 1=0;
step seven: if Flag-close=1 and a > x indicates that the main configuration valve core jumps from the closing direction to the opening direction, the main configuration jumps from the closing direction to the opening direction to set Flag-open 1=1, the main configuration closes the direction to set reset Flag-close=0, and the main configuration jumps from the opening direction to set reset Flag-colse 1=0;
step eight: setting a counter CTU-1, wherein a counting set value is count, and if Flag-open 1=1 indicates that the main valve core moves in the opening direction beyond an action threshold, triggering the counter CTU-1 to count 1 time;
step nine: setting a counter CTU-2, wherein a counting set value is count, and if Flag-close 1=1 indicates that the main valve core moves in the closing direction beyond an action threshold, triggering the counter CTU-2 to count 1 time;
step ten: if the counting times of the counter CTU-1 and the counter CTU-2 are both greater than count, judging that the main and auxiliary pumping faults exist;
step eleven: setting a timer TM, setting a time set value as T, completing the fault judgment in the T time, if the time of the timer TM is greater than T, resetting the counts of Flag-open 1=0, flag-close 1=0, CTU-1 and CTU-2, and then entering the next cycle main-match pumping fault judgment.
The analog quantity signal acquisition module in the first step is a commercially available product, such as Bei Jialai PCC X20 analog quantity signal acquisition module, and the analog quantity signal acquisition module is utilized to acquire a unit breaker position signal (0 or 1) as a unit grid-connected signal.
And the valve core displacement signal in the first step is a 0-20mA analog quantity signal.
And step three, the main valve core displacement signal is processed in the analog quantity signal acquisition module, namely, the continuous 0-20mA analog quantity signal is correspondingly converted into a discrete 0-32767 digital quantity signal by utilizing a digital-to-analog converter of the analog quantity signal acquisition module.
The invention utilizes the fault phenomenon that the valve core moves back and forth in the opening direction and the closing direction during the main and auxiliary drawing, and the valve core displacement signal must alternate back and forth from the opening direction to the closing direction or from the closing direction to the opening direction as the judging condition of the main and auxiliary jump fault.
The invention can automatically and rapidly diagnose the pumping faults of the main and auxiliary controllers, can select to perform redundant switching of the main and auxiliary controllers, prevents the consequences such as frequent oiling, unstable opening, load fluctuation and the like, and ensures the safe and stable operation of the unit.
Compared with the prior art, the invention has the following advantages:
the method of the invention utilizes the fault phenomenon that the valve core moves back and forth to the opening direction and the closing direction in a very short time to set a threshold value for fault judgment when the main valve core is in the main valve pumping, and can rapidly judge the main valve pumping, send an alarm for human intervention and also can select to automatically switch the double controllers, thereby ensuring the safe and stable operation of the unit.
By adopting the method, the functions can be realized by only sending the displacement signal of the main valve core to the acquisition module of the electric control cabinet of the speed regulator and changing the control program of the controller, the universality and the portability are strong, the method has an important guiding effect on the safety and stability of the water wheel generator set in the industry, and the method is suitable for comprehensive popularization in the industry.
The method is simple, efficient and feasible.
Drawings
In order to more clearly illustrate the embodiments of the invention or the technical solutions in the prior art, the drawings that are required in the embodiments or the description of the prior art will be briefly described, it being obvious that the drawings in the following description are only some embodiments of the invention, and that other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
FIG. 1 is a control flow diagram of the present invention;
fig. 2 is a graph showing the relative displacement fluctuation of the main-fit pump of example 1.
Detailed Description
The following description of the embodiments of the present invention will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present invention, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without any inventive effort, are intended to be within the scope of the invention. In the following description, for the sake of clarity in showing the structure and operation of the present invention, reference will be made to the accompanying drawings by means of various numerical words, but the words "1", "2", "3", "4", "a", "b" etc. should be interpreted as words of convenience and not as limiting.
Example 1
The speed regulator control system of the hydropower plant is a multiple closed-loop control system, problems occur in any closed-loop system, the problems are finally reflected in the main distribution action, the oil supply quantity of the switch cavity of the servomotor is regulated to drive the guide vane to be opened or closed, and the main distribution pumping fault is described and analyzed in various documents, and various defect elimination schemes and technical measures are also provided. The frequency sampling, the main-distribution feedback jump, the guide vane feedback jump and the like can cause the main-distribution pumping, the closed-loop system can not be converged when the pumping fault is serious, the load fluctuation is caused, and the problems of unit shutdown and the like caused by accident low oil pressure are solved. Because the current control system of the speed regulator of the hydropower plant adopts double PCC redundancy control, including the sensor and the like, the redundancy configuration is realized, and if the controller can judge the main-distribution pumping fault in time, PCC master-slave switching is performed, thereby avoiding accidents.
When the water turbine speed regulator is in grid connection normal operation, the main valve core is in the middle position, the main valve core displacement is fed back to be 0 after being processed, and the main valve core can move to an opening direction or a closing direction when the load is increased or decreased or primary frequency is modulated. The main distribution jump fault judging condition is that the valve core swings back and forth in the opening direction and the closing direction in a short time when the main distribution is drawn, so that the valve core displacement signal can be used for alternating back and forth from the opening direction to the closing direction or from the closing direction to the opening direction.
As shown in fig. 1, the diagnosis and analysis method for the main and auxiliary pumping faults of the hydropower station speed regulator in the embodiment comprises the following steps:
step one: collecting a main and matched 0-20mA valve core displacement signal, namely a unit breaker position signal (0 or 1) serving as a unit grid-connected signal by using a Bei Jialai PCC X20 analog quantity signal collecting module;
step two: judging whether the unit is in a grid-connected power generation state or not: if the unit circuit breaker is put into operation, the signal acquired by the analog quantity signal acquisition module is 1, which represents the grid-connected state of the unit, and the main and auxiliary pumping fault judging function is put into operation, and the following steps are calculated; if the unit circuit breaker is disconnected, the signal acquired by the analog quantity signal acquisition module is 0, the unit is not in a grid-connected state, the main-match pumping fault judging function is exited, the calculation of the following steps is stopped, the Flag-open 1=0 and the Flag-close 1=0 involved in the following steps are reset to a timer;
step three: processing the main valve core displacement signal in a Bei Jialai PCC X20 analog quantity signal acquisition module, namely correspondingly converting a continuous 0-20mA analog quantity signal into a discrete 0-32767 digital quantity signal by utilizing a digital-to-analog converter of the analog quantity signal acquisition module, and if the acquired analog quantity is XmA, converting the analog quantity signal into a discrete digital quantity signal=X 32767/20 by a controller; assuming that the acquired signal is 10mA, the controller converts the analog quantity signal into a discrete digital quantity signal=10×32767/20=16383;
the code values of the main valve core at the full-open position, the full-closed position and the middle position are recorded respectively:
a code value (21000) of the m-primary-valve element in the fully open position; a code value (12000) of the n-main valve element in the fully closed position;
a code value (16800) of the r-main valve element in the intermediate position; k-code value of valve core displacement when the main valve is opened or closed; a-relative value of spool displacement when the main valve is opened or closed.
When k=18900, k > r, represents that main-valve element in opening direction a= (k-r)/(m-r) =50%;
when k=14400, k < r, represents that the main-valve element is in closing direction a= (k-r)/(r-n) = -50%;
when k=16800, k=r, indicating that the main-valve element is in the neutral position a=0;
flag-open=1 indicates the main-set on direction set, flag-open=0 indicates the main-set on direction set reset;
flag-close=1 indicates a main-configuration closing direction set, flag-close=0 indicates a main-configuration closing direction set reset;
flag-open 1=1 indicates that the master configuration is turned off to turn on, flag-open 1=0 indicates that the master configuration is turned off to turn on;
flag-close 1=1 indicates that the master configuration transitions from the on to the off direction, flag-close 1=0 indicates that the master configuration transitions from the on to the off direction and returns;
step four: setting a threshold value:
the x-main opening direction action threshold is used as a main opening direction jump fault condition, and is set by the site according to the characteristics of the speed regulator, so that the stable operation of the unit is required to be met;
-x-main-accessory closing direction action threshold, as a condition for main-accessory closing direction jump fault, set by site according to governor characteristics, required to meet the steady operation of the unit;
step five: if a > x, i.e. the main valve element moves in the opening direction, the main valve element opening direction is set Flag-open=1; if A < -x represents that the main valve core moves towards the closing direction, setting Flag-closing=1 in the main valve closing direction;
step six: if Flag-open=1 and a < -x, this indicates that the main valve element jumps from the opening direction to the closing direction. The main configuration jumps from the opening direction to the closing direction by Flag-close 1=1, the main configuration starts the direction by Flag-open=0, and the main configuration jumps from the closing direction to the opening direction by Flag-open 1=0;
step seven: if Flag-close=1 and a > x, this indicates that the main valve element jumps from the closing direction to the opening direction. The main configuration jumps from the closing direction to the opening direction and sets Flag-open 1=1, the main configuration changes from the closing direction to the setting reset Flag-close=0, and the main configuration jumps from the opening direction to the closing direction and sets reset Flag-colse 1=0;
step eight: setting a counter CTU-1, wherein a counting set value is count, and if Flag-open 1=1 indicates that the main valve core moves in the opening direction beyond an action threshold, triggering the counter CTU-1 to count 1 time;
step nine: setting a counter CTU-2, wherein a counting set value is count, and if Flag-close 1=1 indicates that the main valve core moves in the closing direction beyond an action threshold, triggering the counter CTU-2 to count 1 time;
step ten: if the counting times of the counter CTU-1 and the counter CTU-2 are both greater than count, judging that the main and auxiliary pumping faults exist;
step eleven: setting a timer TM, setting a time set value as T, completing the fault judgment in the T time, if the time of the timer TM is greater than T, resetting the counts of Flag-open 1=0, flag-close 1=0, CTU-1 and CTU-2, and then entering the next cycle main-match pumping fault judgment.
As a specific example:
taking an overhaul branch skill training room speed regulator control system as an example, a certain analysis setting threshold is as follows:
x=20%，count=3，T=5s
the unit circuit breaker is put into, the main valve core is in the middle position when the speed regulator is in the power generation state and normally operates, the feedback signal A is 0, if the main valve core starts to be drawn for some reason within 5 seconds and moves by more than 20% towards the opening direction, the Flag-open=1 is judged, at the moment, the main valve core moves towards the closing direction again, the displacement A is less than-20%, the main valve core is judged to jump from the opening direction to the closing direction, the Flag-close 1=1, the Flag-close=1, the Flag-open=0, the Flag-open 1=0, and the counter CTU-2 counts, and the main valve core is judged to be drawn for 1 time towards the closing direction;
then the main alignment moves towards the opening direction again, the displacement A is more than 20%, the main alignment is judged to jump from the closing direction to the opening direction, flag-open 1=1, flag-open=1, flag-close 1=0, flag-close=0, and the counter CTU-1 counts, and the main alignment is judged to jump for 1 time in the opening direction;
and if the main valve core jumps 3 times to the opening direction or the closing direction, sending out a main valve pumping fault alarm signal.
If the main-match pumping fault alarm is not sent out within the time T >5s, and the main-match pumping fault is not established, the alternating set signal and the counter are all cleared, flag-open 1=0, flag-close 1=0, ctu-1=0 and ctu-2=0. Then, the fault determination of the next cycle is started.
Through the steps, analysis and judgment of the main and auxiliary pumping faults of the hydropower station speed regulator are completed.
Fig. 2 is a drawing relative displacement fluctuation curve of the main and auxiliary components in the embodiment, and further illustrates analysis of drawing faults of the main and auxiliary components of the speed regulator of the hydropower station, wherein in fig. 2, data of t=5 seconds are collected to 11 measuring points of change of the main and auxiliary components relative displacement, the main and auxiliary components jump 3 times from an opening direction to a closing direction, and the measuring points are points e, g and i, which are counted to exceed the times count=3; the main configuration jumps 3 times from the closing direction to the opening direction, and the measuring points are d point, f point and h point which are counted times of count=3. And the main valve core jumps 3 times to the opening direction and the closing direction, namely judging that the main valve core has a pumping fault.
The foregoing is illustrative of a preferred embodiment of the present invention, but the present invention should not be limited to this embodiment and the disclosure of the drawings. So that equivalents and modifications will fall within the scope of the invention, all within the spirit and scope of the invention as disclosed.
Claims (4)
1. A diagnosis and analysis method for main and auxiliary pumping faults of a hydropower station speed regulator is characterized by comprising the following steps:
step one: acquiring a main valve core displacement signal by using an analog quantity signal acquisition module;
step two: judging whether the unit is in a grid-connected power generation state or not: if the unit circuit breaker is put into operation, the signal acquired by the analog quantity signal acquisition module is 1, which represents the grid-connected state of the unit, and the main and auxiliary pumping fault judging function is put into operation, and the following steps are calculated; if the unit circuit breaker is disconnected, the signal acquired by the analog quantity signal acquisition module is 0, the unit is not in a grid-connected state, the main-match pumping fault judging function is exited, the calculation of the following steps is stopped, the Flag-open 1=0 and the Flag-close 1=0 involved in the following steps are reset to a timer;
step three: processing the displacement signal of the main valve core in an analog quantity signal acquisition module, and respectively recording code values of the main valve core at a full-open position, a full-closed position and a middle position:
the code value of the m-main valve core at the full-open position; the code value of the n-main valve core at the full-closing position;
the code value of the r-main valve core at the middle position; k-code value of valve core displacement when the main valve is opened or closed; a is the relative value of the valve core displacement when the main valve is opened or closed;
when k > r, the main valve element is represented in the opening direction a= (k-r)/(m-r);
when k < r, it indicates that the main-valve element is in the closing direction a= (k-r)/(r-n);
when k=r, it means that the main-valve spool is in neutral position a=0;
flag-open=1 indicates the main-set on direction set, flag-open=0 indicates the main-set on direction set reset;
flag-close=1 indicates a main-configuration closing direction set, flag-close=0 indicates a main-configuration closing direction set reset;
flag-open 1=1 indicates that the master configuration is turned off to turn on, flag-open 1=0 indicates that the master configuration is turned off to turn on;
flag-close 1=1 indicates that the master configuration transitions from the on to the off direction, flag-close 1=0 indicates that the master configuration transitions from the on to the off direction and returns;
step four: setting a threshold value:
the x-main opening direction action threshold is used as a main opening direction jump fault condition, and is set by the site according to the characteristics of the speed regulator, so that the stable operation of the unit is required to be met;
-x-main-accessory closing direction action threshold, as a condition for main-accessory closing direction jump fault, set by site according to governor characteristics, required to meet the steady operation of the unit;
step five: if a > x, i.e. the main valve element moves in the opening direction, the main valve element opening direction is set Flag-open=1; if A < -x represents that the main valve core moves towards the closing direction, setting Flag-closing=1 in the main valve closing direction;
step six: if Flag-open=1 and a < -x indicates that the main valve core jumps from the opening direction to the closing direction, setting Flag-close 1=1 by the main valve core from the opening direction to the closing direction, setting reset Flag-open=0 by the main valve core from the closing direction to the opening direction, and setting reset Flag-open 1=0 by the main valve core from the closing direction to the opening direction;
step seven: if Flag-close=1 and a > x, this indicates that the main valve element jumps from the closing direction to the opening direction. The main configuration jumps from the closing direction to the opening direction and sets Flag-open 1=1, the main configuration changes from the closing direction to the setting reset Flag-close=0, and the main configuration jumps from the opening direction to the closing direction and sets reset Flag-colse 1=0;
step eight: setting a counter CTU-1, wherein a counting set value is count, and if Flag-open 1=1 indicates that the main valve core moves in the opening direction beyond an action threshold, triggering the counter CTU-1 to count 1 time;
step nine: setting a counter CTU-2, wherein a counting set value is count, and if Flag-close 1=1 indicates that the main valve core moves in the closing direction beyond an action threshold, triggering the counter CTU-2 to count 1 time;
step ten: if the counting times of the counter CTU-1 and the counter CTU-2 are both greater than count, judging that the main and auxiliary pumping faults exist;
step eleven: setting a timer TM, setting a time set value as T, completing the fault judgment in the T time, if the time of the timer TM is greater than T, resetting the counts of Flag-open 1=0, flag-close 1=0, CTU-1 and CTU-2, and then entering the next cycle main-match pumping fault judgment.
2. The hydropower station speed regulator main-auxiliary pumping fault diagnosis and analysis method according to claim 1, wherein the method comprises the following steps: the analog quantity signal acquisition module in the first step is a commercially available product, and the analog quantity signal acquisition module is used for acquiring a position signal of a circuit breaker of the unit to be used as a unit grid-connected signal.
3. The hydropower station speed regulator main-auxiliary pumping fault diagnosis and analysis method according to claim 1, wherein the method comprises the following steps: and the valve core displacement signal in the first step is a 0-20mA analog quantity signal.
4. The hydropower station speed regulator main-auxiliary pumping fault diagnosis and analysis method according to claim 1, wherein the method comprises the following steps: and step three, the main valve core displacement signal is processed in the analog quantity signal acquisition module, namely, the continuous 0-20mA analog quantity signal is correspondingly converted into a discrete 0-32767 digital quantity signal by utilizing a digital-to-analog converter of the analog quantity signal acquisition module.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310959623.0A CN117032160A (en) | 2023-08-01 | 2023-08-01 | Diagnosis and analysis method for main and auxiliary pumping faults of hydropower station speed regulator |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202310959623.0A CN117032160A (en) | 2023-08-01 | 2023-08-01 | Diagnosis and analysis method for main and auxiliary pumping faults of hydropower station speed regulator |
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| CN202310959623.0A Pending CN117032160A (en) | 2023-08-01 | 2023-08-01 | Diagnosis and analysis method for main and auxiliary pumping faults of hydropower station speed regulator |
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2023
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