CN209471144U - A kind of hydroelectric power plant's generating unit speed node calibration equipment - Google Patents
A kind of hydroelectric power plant's generating unit speed node calibration equipment Download PDFInfo
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- CN209471144U CN209471144U CN201920220497.6U CN201920220497U CN209471144U CN 209471144 U CN209471144 U CN 209471144U CN 201920220497 U CN201920220497 U CN 201920220497U CN 209471144 U CN209471144 U CN 209471144U
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Abstract
A kind of hydroelectric power plant's generating unit speed node calibration equipment, including signal generator, signal generator is connect with frequency isolation power transformation, frequency isolation change is electrically connected with signal transducer, signal transducer is electrically connected with PCC controller, and PCC controller is electrically connected with man-machine interface, revolving speed output relay and revolving speed contact indicator light respectively；Signal generator is for providing the electric signal of different frequency, waveform and output level；Frequency isolation becomes for guaranteeing that frequency isolation becomes input terminal and output end signal is independent, does not interfere with each other；Signal transducer is transmitted to PCC controller for the electric signal that signal generator issues to be converted to required electric signal.Present apparatus measurement structure is simple, reliable in action, and strong operability is easy to use, and the Reliability of Microprocessor of generating unit speed output node can be improved.
Description
Technical field
The utility model belongs to hydroelectric power plant's observation and control technology field, in particular to a kind of hydroelectric power plant's generating unit speed node verification dress
It sets.
Background technique
For hydroelectric power plant's unit allocation, the generating unit speed basic underlying variables parameter important as one, is most important
One of variable is controlled, the precision and timeliness of measurement are directly related to the control effect of hydrogenerator set control system, together
When revolving speed output node whether action message is directly related to the reliability of electrical equipment.Generating unit speed is broken generally into ten Yu Zuzhuan
Fast output node, each node have its importance and directly participate in equipment control, especially zero speed, revolving speed less than 1%,
Revolving speed directly participates in throwing and moves back wriggling detector, throws and move back mechanical braking, hydraulic pressure system with revolving speed less than 90% greater than 95% equal revolving speeds node
System throw move back, set state torsion, the control of start and stop excitation system, the important equipments (system) such as start and stop high pressure oil system.Therefore, right
Turbine-generator units carry out quick, high-precision measurement and output revolving speed node is always the target that engineers and technicians pursue.
Tach signal belongs to frequency signal, has the characteristics that quickly variation, vulnerable to interference, thus how quickly and accurately to detect
Frequency signal, and then accurately and reliably export revolving speed node and meet control response demand, it is very important in Control System Design
Important link, and the greatest difficulty faced in many Hydropower Equipments operations at present and maintenance.Currently, revolving speed output node
There has been no ready-made calibration equipments for verification, cannot reliably examine rotation speed control loop and its output node, the school used now
It tests that process is excessively coarse, method is too simple, is had the following problems in revolving speed checking procedure:
1, when examining gear panel measurement control loop and revolving speed output node, magnetic or metal object is visited in gear panel measurement
Electromagnetic interference or the big axis rotation of simulation are carried out at head to detect the measurement of fluted disc frequency and its verification of output node.The method is only
Short time and the lower tachometer value of small part can be simulated, can not achieve the process simulation that revolving speed continuously rises, can not be verified complete
Action value/resetting value of portion's revolving speed output node and action value of electrically overrunning.
2, residual voltage frequency can not be normally detected when unit is in and shuts down state, can not also carry out detection residual voltage frequency control
Circuit and verification revolving speed output node can only carry out monitoring recorded broadcast to residual voltage frequency with debugging computer in unit start process,
Being compared by both residual voltage frequency curve track and time of revolving speed node action and action value just can determine that residual voltage frequency
The Reliability of Microprocessor of control loop and its output node.There are biggish due to artificially reading data and compare for the method
Error rate cannot be satisfied with along with being to carry out detecting there are biggish risk, and adjustment limited opportunities in start process
The demand of field adjustable and correction.
3, the movement of relay output contact is detected by way of forcing relay coil, and then is verified output and extremely referred to
Show lamp, monitoring system, the action situation for braking the systems such as air lock and excitation system revolving speed node.The method detection range is limited,
It is limited only to the output par, c of tachometric relay, cannot effectively suggest the reliability of entire frequency-survey loop.
Utility model content
In view of technical problem present in background technique, a kind of hydroelectric power plant's generating unit speed node provided by the utility model
Calibration equipment, measurement structure is simple, reliable in action, and strong operability is easy to use, and the movement of generating unit speed output node can be improved
Reliability.
In order to solve the above-mentioned technical problem, the utility model takes following technical solution to realize:
A kind of hydroelectric power plant's generating unit speed node calibration equipment, including signal generator, signal generator and frequency isolation become
Electrical connection, frequency isolation change are electrically connected with signal transducer, and signal transducer is electrically connected with PCC controller, PCC controller difference
It is electrically connected with man-machine interface, revolving speed output relay and revolving speed contact indicator light；
Signal generator is for providing the electric signal of different frequency, waveform and output level；
Frequency isolation becomes for guaranteeing that frequency isolation becomes input terminal and output end signal is independent, does not interfere with each other；
Signal transducer is transmitted to PCC for the electric signal that signal generator issues to be converted to required electric signal
Controller.
In preferred scheme, the PCC controller includes CPU module, communication module, power module, DO module and height
Fast counting module, man-machine interface and the communication module of PCC controller are communicated by serial ports；Revolving speed contact indicator light passes through
The DO module triggering of PCC controller is lighted；Revolving speed output relay is connect with the DO module of PCC controller, for exporting difference
The on-off signal of revolving speed nodal value；Signal transducer is electrically connected with the high speed counting module of PCC controller.
In preferred scheme, the power module of the PCC controller is electrically connected to a power source.
In preferred scheme, the signal generator is frequency synthesising type signal generator, utilizes standard frequency source
By phase lock control electric tuning oscillator, it is able to achieve frequency multiplication, frequency dividing and mixing simultaneously in the loop and is allowed to generate and export respectively
The signal of frequency needed for kind.
In preferred scheme, the signal transducer is frequency measurement trim panel.
In preferred scheme, the revolving speed contact indicator light includes red indicating light and white indicating light.
In preferred scheme, the frequency isolation becomes light sensation or the frequency isolation of magnetic strength device becomes.
In preferred scheme, after the electric signal of the signal transducer output is handled by high speed counting module, then pass
The CPU module for transporting to PCC controller is calculated, the CPU module will treated electric signal transmission to man-machine interface, revolving speed
Output relay and revolving speed contact indicator light.
This patent can reach it is following the utility model has the advantages that
1, a kind of hydroelectric power plant's generating unit speed node calibration equipment provided by the utility model and method use signal generator
Hair frequency, it is fairly simple especially with the method for generating sinusoidal signal and more convenient with sinusoidal signal measurement, and conventional school
Proved recipe method can only verify low frequency revolving speed or instantaneous probabilistic tachometer value, the utility model patent effectively increase revolving speed node
Reliability, accuracy and the continuity of calibration equipment；
2, using PCC controller as master element, stability and reliability with higher provide the utility model
Measuring device have self-diagnostic function, when frequency change rate be more than difference when, system can automatic shield output frequency node, it is this
The use of mechanism can effectively inhibit the mutation of signal source, it can be ensured that checking procedure truly simulates the rising of generating unit speed under
Drop, greatly improves the fault-tolerant ability of calibration equipment, to further increase the reliability of system；
3, the utility model is defeated using man-machine interface, revolving speed node indicator light and three road revolving speed node of revolving speed output relay
Out, the comparativity for improving the output of revolving speed node avoids the trouble for forcing relay coil movement, can detect three tunnels simultaneously and turn
The output node of speed, greatly improves work efficiency, and reduces human cost；
4, the utility model uses PCC control principle, improves the automatization level of calibration equipment and method, passes through signal
The mode of source hair frequency realizes detection and verifying work to entire frequency measurement control loop, and precision is high, easy to use and flexible, cost
Low, cost performance is high.
Detailed description of the invention
The utility model is described in further detail with reference to the accompanying drawings and examples:
Fig. 1 is the utility model module connection figure.
In figure: PCC controller 1, signal generator 2, frequency isolation become 3, signal transducer 4, power supply 5, revolving speed contact finger
Show lamp 6, man-machine interface 7, revolving speed output relay 8.
Specific embodiment
Preferred scheme is as shown in Figure 1, a kind of hydroelectric power plant's generating unit speed node calibration equipment, including signal generator 2, letter
Number generator 2 becomes 3 with frequency isolation and be electrically connected, and frequency isolation change 3 is electrically connected with signal transducer 4, signal transducer 4 and PCC
Controller 1 is electrically connected, and PCC controller 1 is electrically connected with man-machine interface 7, revolving speed output relay 8 and revolving speed contact indicator light 6 respectively
It connects；
Signal generator 2 is for providing the electric signal of different frequency, waveform and output level；
Frequency isolation becomes 3 for guaranteeing that frequency isolation becomes 3 input terminals and output end signal is independent, does not interfere with each other；
Signal transducer 4 is transmitted to for the electric signal that signal generator 2 issues to be converted to required electric signal
PCC controller 1.
Preferred scheme as shown in Figure 1, PCC controller 1 include CPU module, communication module, power module, DO module and
The communication module of high speed counting module, man-machine interface 7 and PCC controller 1 is communicated by serial ports；The display of man-machine interface 7 turns
The action event of fast node records, and the action value and resetting value of revolving speed node can artificially be arranged；The CPU module of PCC controller 1 is excellent
First using the CPU module of 2003 series of Bei Jialai, DO module uses the I/O module with warm connection function；
Revolving speed contact indicator light 6 is lighted by the DO module triggering of PCC controller 1；Each revolving speed contact indicator light 6 is fixed
Its adopted different tachometer value, in order to intuitively indicate and differentiate revolving speed node action situation；
Revolving speed output relay 8 is connect with the DO module of PCC controller 1, for exporting the on-off of different rotating speeds nodal value
Signal；Revolving speed output relay 8, while can be with by its auxiliary contact according to different revolving speed nodal value realization movements and involution
Revolving speed node is provided to systems such as excitation system, mechanical brakings, so that it participates in equipment control；Revolving speed output relay 8 is preferred
Using the relay of Schneider series；
Signal transducer 4 is electrically connected with the high speed counting module of PCC controller 1；The high speed counting module is DM455
High speed counting module；
Signal generator 2 can provide the equipment of various frequencies, waveform and output level electric signal, in measurement frequency characteristic
Signal source or driving source as test provide a kind of stable frequency signal source to PCC controller 1；Signal generator 2 provides
Frequency signal source enter signal transducer 4, the signal transducer 4 and PCC controller 1 after frequency isolation becomes 3
The connection of DM455 high speed counting module, the various signal sources such as the sinusoidal waveform, the rectangular pulse that are exported according to signal generator 2 are turned
It is had frequency accuracy identical with standard frequency source and stability, after conversion by the signal of the optional frequency needed for being changed to
Signal source be directly entered DM55 high speed counting module.
Preferred scheme as shown in Figure 1, the power module of PCC controller 1 be electrically connected with power supply 5, be frequency isolation change 3,
Signal generator 4, man-machine interface 7, revolving speed node indicator light 6, revolving speed output relay 8 and PCC controller 1 provide independent
Redundant power guarantees that device does not power off.
Preferred scheme utilizes standard frequency as shown in Figure 1, signal generator 2 is frequency synthesising type signal generator
Source is able to achieve frequency multiplication, frequency dividing and mixing simultaneously in the loop and is allowed to generate and be exported by phase lock control electric tuning oscillator
The signal of frequency needed for various.
Preferred scheme is as shown in Figure 1, signal transducer 4 is frequency measurement trim panel, it is preferred to use what one is particularly good at is produced up to company
NSD_00001B frequency measurement trim panel.
Preferred scheme is as shown in Figure 1, revolving speed contact indicator light 6 includes red indicating light and white indicating light；Greater than 95%
Above revolving speed node indicator light is using red, model XB2-BVB4LC indicator light, less than 95% and revolving speed node below
Using white indicating light, for distinguishing high revolving speed and slow-speed of revolution signal.
Preferred scheme is as shown in Figure 1, frequency isolation becomes 3 as the change of the frequency isolation of light sensation or magnetic strength device.
Preferred scheme as shown in Figure 1, the electric signal that exports of signal transducer 4 by high speed counting module processing after, then
The CPU module for being transmitted to PCC controller 1 is calculated, the CPU module will treated electric signal transmission to man-machine interface 7,
Revolving speed output relay 8 and revolving speed contact indicator light 6；Man-machine interface 7 preferentially uses the original-pack model DOP_B05S111 of Bei Jialai
5.6 cun of import is very color to touch industrial personal computer, the electric supply system with backup battery.
The working principle of whole device is as follows:
When 2 output frequency signal source of signal generator, first by 1 received signal of PCC controller, pass through frequency isolation
Become 3 and carry out signal isolation conversion, then carries out demodulation and switch back to original signal or unlike signal before isolation, while to signal after isolation
Power supply carry out isolation processing, guarantee transformed signal, power supply, between it is absolutely independent；
Signal source after isolation is filtered, after shaping and conversion process waveform by signal transducer 4, using
The CPU module to PCC controller 1 is sent to carry out operation on after DM455 high speed counting module, it will be related after the processing of PCC controller
The switching node of frequency signal by DO module feedback to revolving speed node indicator light 6 and is turned by sending in communication to man-machine interface 7
Fast output relay 8 exports two ways by data communication method and hard contact and exports revolving speed node, to improve participation equipment
Control and monitoring, improve the reliability of output node；Meanwhile it being exported by revolving speed node indicator light 6, man-machine interface 7 and revolving speed
The output of 8 three tunnel of relay compares, and the reliability and comparativity of the present apparatus can be improved；It is defeated by can be achieved in man-machine interface 7
The functions such as the action value and resetting value of egress actuation time record and setting output node；
In order to truly simulate the rise and fall of generating unit speed, in order to improve the reliability of present apparatus output signal, lead to
Frequency can continuously be increased and decreased by crossing signal generator 2, can pass through the small of setting near revolving speed node action value with resetting value
Step-length come carry out verification revolving speed node, improve revolving speed node action accuracy；Meanwhile PCC controller 1 have revolving speed filtering,
The functions such as frequency difference alarm, it is ensured that revolving speed checking procedure is continuous, stable, in case revolving speed, which quickly changes, leads to data distortion
With node tripping, the reliability of device and output node is effectively increased.
The application method of whole device is as follows:
Firstly, power supply 5 is placed in the state of putting into operation, become 3, signal adapter 4, PCC controller 1, revolving speed to frequency isolation
Node indicator light 6, human-computer interaction interface 7, revolving speed output relay 8 provide power supply, it is made to be in normal operating condition.
Second, 2 output frequency signal source of signal generator, be filtered by frequency isolation change 3 and signal transducer 4,
After shaping and conversion process waveform, after the DM455 high speed counting module of PCC controller 1 on send to the CPU of PCC controller 1
Module carries out frequency values operation.
Third, the switching value node of treated the frequency signal of PCC controller 1 are real by being sent in communication to man-machine interface 7
When display frequency analog signals and switching value on off operating mode, and by the way that output node actuation time can be achieved in man-machine interface 7
Record is, it can be achieved that the functions such as the action value of setting output node and resetting value.
4th, it is exported by the DO module of PCC controller 1 to revolving speed node indicator light 6 and revolving speed output relay 8, is led to
The setting value of overfrequency signal triggers the indicator light and relay of different nodes.
5th, what the present apparatus can be exported by observation revolving speed node indicator light 6, man-machine interface 7 and revolving speed output relay 8
Movement and instruction situation compare, and improve the reliability and comparativity of the revolving speed verification of the present apparatus.
6th, the repeatable operation of above-mentioned steps, and frequency can continuously be increased and decreased by signal generator 2, in revolving speed section
Point action value and resetting value can nearby carry out verification revolving speed node by the way that small step-length is arranged, and improve the standard of revolving speed node action
True property.
7th, power supply 5 is closed at the end of verifying work can close present apparatus power supply.
The above embodiments are only the optimal technical scheme of the utility model, and are not construed as the limit for the utility model
System, the technical solution that the protection scope of the utility model should be recorded with claim, the technical solution recorded including claim
The equivalents of middle technical characteristic are protection scope.Equivalent replacement i.e. within this range is improved, also in the utility model
Protection scope within.
Claims (8)
1. a kind of hydroelectric power plant's generating unit speed node calibration equipment, it is characterised in that: including signal generator (2), signal generator
(2) with frequency isolation become (3) be electrically connected, frequency isolation become (3) be electrically connected with signal transducer (4), signal transducer (4) and
PCC controller (1) electrical connection, PCC controller (1) respectively with man-machine interface (7), revolving speed output relay (8) and revolving speed contact
Indicator light (6) electrical connection；
Signal generator (2) is for providing the electric signal of different frequency, waveform and output level；
Frequency isolation becomes (3) for guaranteeing that frequency isolation becomes (3) input terminal and output end signal is independent, does not interfere with each other；
Signal transducer (4) is used to the electric signal that signal generator (2) issue being converted to required electric signal, and is transmitted to
PCC controller (1).
2. a kind of hydroelectric power plant's generating unit speed node calibration equipment according to claim 1, it is characterised in that: PCC controller
It (1) include CPU module, communication module, power module, DO module and high speed counting module, man-machine interface (7) and PCC controller
(1) communication module is communicated by serial ports；Revolving speed contact indicator light (6) passes through the DO module trigger point of PCC controller (1)
It is bright；Revolving speed output relay (8) is connect with the DO module of PCC controller (1), and the on-off for exporting different rotating speeds nodal value is believed
Number；Signal transducer (4) is electrically connected with the high speed counting module of PCC controller (1).
3. a kind of hydroelectric power plant's generating unit speed node calibration equipment according to claim 2, it is characterised in that: PCC controller
(1) power module is electrically connected with power supply (5).
4. a kind of hydroelectric power plant's generating unit speed node calibration equipment according to claim 1, it is characterised in that: signal generator
It (2) is frequency synthesising type signal generator, using standard frequency source by phase lock control electric tuning oscillator, in the loop
Frequency multiplication, frequency dividing and mixing is able to achieve simultaneously to be allowed to generate and export the signal of various required frequencies.
5. a kind of hydroelectric power plant's generating unit speed node calibration equipment according to claim 1, it is characterised in that: signal transducer
It (4) is frequency measurement trim panel.
6. a kind of hydroelectric power plant's generating unit speed node calibration equipment according to claim 1, it is characterised in that: revolving speed contact finger
Show that lamp (6) includes red indicating light and white indicating light.
7. a kind of hydroelectric power plant's generating unit speed node calibration equipment according to claim 1, it is characterised in that: frequency isolation becomes
(3) become for the frequency isolation of light sensation or magnetic strength device.
8. a kind of hydroelectric power plant's generating unit speed node calibration equipment according to claim 1 or 2, it is characterised in that: signal turns
After the electric signal of plate (4) output is changed by high speed counting module processing, then it is transmitted to the CPU module of PCC controller (1) and is counted
Calculate, the CPU module will treated electric signal transmission to man-machine interface (7), revolving speed output relay (8) and revolving speed contact finger
Show lamp (6).
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| Application Number | Priority Date | Filing Date | Title |
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| CN201920220497.6U CN209471144U (en) | 2019-02-21 | 2019-02-21 | A kind of hydroelectric power plant's generating unit speed node calibration equipment |
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|---|---|---|---|
| CN201920220497.6U CN209471144U (en) | 2019-02-21 | 2019-02-21 | A kind of hydroelectric power plant's generating unit speed node calibration equipment |
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| CN209471144U true CN209471144U (en) | 2019-10-08 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109725176A (en) * | 2019-02-21 | 2019-05-07 | 中国长江电力股份有限公司 | A kind of hydroelectric power plant's generating unit speed node calibration equipment and method of calibration |
-
2019
- 2019-02-21 CN CN201920220497.6U patent/CN209471144U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109725176A (en) * | 2019-02-21 | 2019-05-07 | 中国长江电力股份有限公司 | A kind of hydroelectric power plant's generating unit speed node calibration equipment and method of calibration |
| CN109725176B (en) * | 2019-02-21 | 2024-03-12 | 中国长江电力股份有限公司 | Hydropower plant unit rotating speed node verification device and method |
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