CN208950766U - A kind of judgement hydrogovernor master matches the device of tripping - Google Patents
A kind of judgement hydrogovernor master matches the device of tripping Download PDFInfo
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- CN208950766U CN208950766U CN201821815199.3U CN201821815199U CN208950766U CN 208950766 U CN208950766 U CN 208950766U CN 201821815199 U CN201821815199 U CN 201821815199U CN 208950766 U CN208950766 U CN 208950766U
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- tripping
- eddy current
- judgement
- sensor
- main
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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
Abstract
The utility model discloses the devices that a kind of judgement hydrogovernor master matches tripping, including bottom plate, mounting frame for sensor, eddy current displacement sensor, energy supply control module, Analog input mModule and tachometric relay, mounting frame for sensor bottom end is fixed on bottom plate, eddy current displacement sensor is fixed on the top of mounting frame for sensor by fixing bolt, eddy current displacement sensor is connect with energy supply control module and Analog input mModule, eddy current displacement sensor measures tested bracket displacement transmission to Analog input mModule, displacement signal is transferred to monitoring slave computer PLC by Analog input mModule, label is main in monitoring slave computer PLC inputs with evolution to maximum with middle position and master, monitoring slave computer PLC reads main three position signals matched in real time, judge main with whether in non-off position, it solves master to match Spool position judgement inaccuracy, false positive signal are continuous, and master caused by governor PLC ontology is avoided to judge Problem of Failure with tripping.
Description
Technical field
The utility model relates to water power technical field of power generation more particularly to a kind of judgement hydrogovernor master with tripping
Device.
Background technique
The harm of the accident of overrunning of turbine-generator units be it is very big, huge centrifugal force may be made when overrunning
It increased dramatically at the vibration of unit, throw, it could even be possible to unit rotating part and fixed part can be made to collide, cause water wheels
Generating set is badly damaged, and unit is overrun accident in order to prevent, and three-level overspeed protection is generally arranged in power station: revolving speed is greater than
115%Ne, and main dispensing spool positional fault；Revolving speed is greater than 140%Ne；Mechanic over speed protection device.Three-level protective can all pass through water
Machine protective loop starts accidental shutdown process.Level-one overspeed protection: generating unit speed is greater than 115% rated speed and main dispensing spool position
Mistake is set, in the case where normal removal of load, governor can make generating unit speed enter idle running state by main with control guide vane opening,
In this adjustment process, generating unit speed is greater than 115%Ne and belongs to normal regulating in a bit of time, so main dispensing spool position signal
Judgment accuracy is most important.
Currently, the main dispensing spool position signal judgment method for each Hydropower Unit level-one overspeed protection is divided into two substantially
Kind: the first is judged by microswitch or close to switch external device, is in fact exactly to judge the main position for fitting over non-pass
It sets, only contact can just reset when the direction that main orientation is closed is dynamic, and main dispensing spool position signal can be always when most of
It keeping, sending on not the stopping of action signal causes monitoring system host computer brush screen too fast, very big pressure is caused to operations staff,
On the other hand, since the dead zone of general travel switch is at least 2 ~ 4 mm, and the stroke of general main control valve is mostly in 8 ~ 10 mm,
The reliability for causing the trip to switch is not high, increases the risk of false protection.Second is to main in governor PLC with valve
Core position signal is judged that this method has the risk of failure, when governor PLC failure causes main dispensing spool to be non-off position
When, protection will fail.
Currently, monitoring system only simply shows that this is also with tripping signal using main dispensing spool position signal as main
It is main with no tripping in the case where, monitoring system brush screen always, alarm it is main with tripping the reason of.
Therefore it needs to propose that a kind of judgement hydrogovernor master matches the device of tripping, can effectively improve and judge precision, keep away
Exempting from the constantly above-mentioned monitoring of false positive signal leads to quick brush screen, avoids because main caused by governor PLC ontology lose with tripping judgement
Effect problem.
Utility model content
The purpose of this utility model: it proposes that a kind of judgement hydrogovernor master matches the device of tripping, can effectively improve and sentence
Disconnected precision, avoid false positive signal it is continuous on give, the problem for causing monitoring system host computer brush screen too fast, while avoiding because of speed regulation
It is main caused by device PLC ontology to judge Problem of Failure with tripping.
The technical solution of the utility model includes:
A kind of judgement hydrogovernor master matches the device of tripping, including bottom plate, mounting frame for sensor, current vortex displacement
Sensor, energy supply control module, Analog input mModule and tachometric relay, the mounting frame for sensor bottom end are fixed on
On bottom plate, the eddy current displacement sensor is fixed on the top of the mounting frame for sensor by fixing bolt, described
Eddy current displacement sensor connect with energy supply control module and Analog input mModule.
It further include tested bracket, the tested bracket is arranged below eddy current displacement sensor, and tested bracket side
Face is bolted on main with piston rod end.
The useful range of the eddy current displacement sensor is greater than the main maximum displacement matched.
The Analog input mModule and tachometric relay is connect with monitoring slave computer PLC, the tachometric relay
Also it is connect with external tach signal transmitting device.
The energy supply control module output voltage is -24V.
The tested bracket is an iron plate, and the iron plate width is the 1.5 of electric vortex displacement sensor probe diameter
Times or more, iron plate thickness is greater than 0.1 millimeter.
It is a kind of judgement hydrogovernor master match tripping device, the measurement method the following steps are included:
Step 1: manual operation governor makes main in fully open position, bit positions, closed positions, master matches at this time respectively
There are certain displacements, are mounted on the main tested bracket with piston rod end and are consistent with main with displacement.
Step 2: eddy current displacement sensor measures the displacement of tested bracket, eddy current displacement sensor and will then measure
Tested bracket displacement transmission to Analog input mModule, tested bracket displacement signal is transferred to monitoring by Analog input mModule
Slave computer PLC, what is obtained at this time is namely main with displacement；
Step 3: reading the three shift simulation amounts matched by the master that Analog input mModule exports in monitoring slave computer PLC
Input value determines the main position matched, and is divided into label；
Step 4: when generating unit speed is greater than 115% rated speed, sending on tachometric relay action signal to monitoring bottom
Machine PLC；
Step 5: monitoring slave computer PLC reads master with displacement signal in real time, and judges that master with whether in non-off position, works as master
With position when master matches evolution between maximum value with middle position mark value and master, and it is specified greater than 115% to meet generating unit speed simultaneously
Revolving speed and unit are unloaded state, and in conjunction with unit status signal, output is main to match tripping signal, and monitoring slave computer PLC issues instruction and opens
It is dynamic main with tripping protection system, while command signal is transferred to monitoring system host computer.
The utility model has the beneficial effects that
It proposes that a kind of judgement hydrogovernor master matches the device of tripping, tested branch is measured by eddy current displacement sensor
Frame displacement is i.e. main to be transferred to Analog input mModule with displacement, and tested bracket displacement signal is transferred to prison by Analog input mModule
Slave computer PLC is controlled, label master passes through with middle position and main evolution of matching to maximum input and monitors slave computer in monitoring slave computer PLC
PLC reads main three position signals matched in real time, and judges that master with whether in non-off position, solves main dispensing spool position judgement
Inaccuracy problem, while avoid false positive signal it is continuous on give, the problem for causing monitoring system host computer brush screen too fast, and
Because main caused by governor PLC ontology judge Problem of Failure with tripping.
Detailed description of the invention
Fig. 1 is utility model device structural schematic diagram；
Fig. 2 is the utility model transport stream signal journey figure；
It is identified in figure: 1, bottom plate, 2, mounting frame for sensor, 3, eddy current displacement sensor, 4, fixing bolt, 5, power supply
Control module, 6, Analog input mModule, 7, tachometric relay, 8, monitoring slave computer PLC, 9, tested bracket, 10, main match piston
Bar.
Specific embodiment
The utility model is further introduced with reference to the accompanying drawing, as shown in Figure 1, a kind of judgement hydrogovernor
The main device for matching tripping, including bottom plate 1, mounting frame for sensor 2, eddy current displacement sensor 3, energy supply control module 5, simulation
Amount input module 6 and tachometric relay 7,2 bottom end of mounting frame for sensor are fixed on bottom plate 1, the current vortex
Displacement sensor 3 is fixed on the top of the mounting frame for sensor 2 by fixing bolt 4, and mounting frame for sensor 2 is metal
Material, rigidity is enough, it is ensured that will not cause to shake because of the vibration of governor, the eddy current displacement sensor 3 and power supply
Control module 5 and Analog input mModule 6 connect.
It further include tested bracket 9, the tested bracket 9 is arranged below eddy current displacement sensor 3, and tested bracket
3 sides are bolted on main with 10 end of piston rod.
The useful range of the eddy current displacement sensor 3 is greater than the main maximum displacement matched, and current vortex displacement senses
The measurement accuracy of device 3 can achieve micron.
The Analog input mModule 6 and tachometric relay 7 is connect with monitoring slave computer PLC8, the revolving speed relay
Device 7 is also connect with external tach signal transmitting device, tach signal transmitting device by governor tach signal be transferred to revolving speed after
Electric appliance 7.
5 output voltage of energy supply control module is -24V, is powered for current vortex sensor 3.
The tested bracket 9 is an iron plate, and the iron plate width is 3 probe diameter of eddy current displacement sensor
1.5 times or more, iron plate thickness is greater than 0.1 millimeter.Iron plate length is to be suitble to current vortex sensor 3 to install, it is ensured that current vortex sensing
Device 3 facilitates fixation, and scraping collision does not occur with associated components with main.
It is a kind of judgement hydrogovernor master match tripping device, the measurement method the following steps are included:
Step 1: manual operation governor makes main in fully open position, bit positions, closed positions, master matches at this time respectively
There are certain displacements, are mounted on the main tested bracket 9 with 10 end of piston rod and are consistent with main with displacement.
Step 2: eddy current displacement sensor 3 measures the displacement of tested bracket 9, then eddy current displacement sensor 3 and general
9 displacement transmission of tested bracket measured passes tested 9 displacement signal of bracket to Analog input mModule 6, Analog input mModule 6
It is defeated by monitoring slave computer PLC8, what is obtained at this time is namely main with displacement；
Step 3: reading three shift simulations matched by the master that Analog input mModule 6 exports in monitoring slave computer PLC8
Input value is measured, determines the main position matched, and be divided into label；
Step 4: when generating unit speed is greater than 115% rated speed, sending action signal under monitoring on tachometric relay 7
Position machine PLC8；
Step 5: monitoring slave computer PLC8 reads in real time it is main with displacement signal, and judge it is main whether match in non-off position, when
Master matches position when master matches evolution between maximum value with middle position mark value and master, and meets generating unit speed simultaneously and be greater than 115% volume
Revolving speed and unit are determined for unloaded state, and output is main to match tripping signal, in conjunction with unit status signal, monitors slave computer PLC8 and issues instruction
Starting is main to protect system with tripping, while command signal is transferred to monitoring system host computer.
The utility model proposes a kind of judgement hydrogovernor master match tripping device and measurement method, such as figure 2
Shown in transport stream signal journey figure, eddy current displacement sensor 3 measures that the tested displacement of bracket 9 is i.e. main to be transferred to analog quantity with displacement
Tested 9 displacement signal of bracket is transferred to monitoring slave computer PLC8 by input module 6, Analog input mModule 6, in monitoring slave computer
Marked in PLC8 it is main with middle position and it is main with evolution to maximum input (containing be equal to it is main with median and be equal to it is main with evolution to displacement most
Big value), main three position signals matched are read by monitoring slave computer PLC8 in real time, send action signal extremely on tachometric relay 7
Slave computer PLC8 is monitored, in conjunction with unit status signal, and judges that master with whether in non-off position, monitors slave computer PLC8 sending and refers to
It enables starting is main to protect system with tripping, while command signal is transferred to monitoring system host computer, solve main dispensing spool position
Judge inaccuracy problem, while avoid false positive signal it is continuous on give, the problem for causing monitoring system host computer brush screen too fast,
And because main caused by governor PLC ontology judge Problem of Failure with tripping.
Claims (6)
1. the device that a kind of judgement hydrogovernor master matches tripping, it is characterised in that: including bottom plate (1), sensor installation branch
Frame (2), eddy current displacement sensor (3), energy supply control module (5), Analog input mModule (6) and tachometric relay (7), institute
Mounting frame for sensor (2) bottom end stated is fixed on bottom plate (1), and the eddy current displacement sensor (3) passes through fixed spiral shell
Bolt (4) is fixed on the top of the mounting frame for sensor (2), the eddy current displacement sensor (3) respectively with power supply control
Molding block (5) and Analog input mModule (6) connection.
2. the device that a kind of judgement hydrogovernor master according to claim 1 matches tripping, it is characterised in that: further include
Tested bracket (9), tested bracket (9) setting is below eddy current displacement sensor (3), and tested bracket (9) side
It is bolted on main with piston rod (10) end.
3. the device that a kind of judgement hydrogovernor master according to claim 1 matches tripping, it is characterised in that: described
The useful range of eddy current displacement sensor (3) is greater than the main maximum displacement matched.
4. the device that a kind of judgement hydrogovernor master according to claim 1 matches tripping, it is characterised in that: described
Analog input mModule (6) and tachometric relay (7) are connect (8) with monitoring slave computer PLC, and the tachometric relay (7) is also
It is connect with external tach signal transmitting device.
5. the device that a kind of judgement hydrogovernor master according to claim 1 matches tripping, it is characterised in that: described
Energy supply control module (5) output voltage is -24V.
6. the device that a kind of judgement hydrogovernor master according to claim 2 matches tripping, it is characterised in that: described
Tested bracket (9) are an iron plate, and the iron plate width is 1.5 times or more of eddy current displacement sensor (3) probe diameter, iron
Piece thickness is greater than 0.1 millimeter.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821815199.3U CN208950766U (en) | 2018-11-06 | 2018-11-06 | A kind of judgement hydrogovernor master matches the device of tripping |
Applications Claiming Priority (1)
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|---|---|---|---|
| CN201821815199.3U CN208950766U (en) | 2018-11-06 | 2018-11-06 | A kind of judgement hydrogovernor master matches the device of tripping |
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| CN208950766U true CN208950766U (en) | 2019-06-07 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109139352A (en) * | 2018-11-06 | 2019-01-04 | 贵州电网有限责任公司 | A kind of judgement hydrogovernor master matches the device and measurement method of tripping |
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2018
- 2018-11-06 CN CN201821815199.3U patent/CN208950766U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109139352A (en) * | 2018-11-06 | 2019-01-04 | 贵州电网有限责任公司 | A kind of judgement hydrogovernor master matches the device and measurement method of tripping |
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