CN106340967A - Smart operation apparatus and smart operation method of low-voltage generator of hydropower station - Google Patents
Smart operation apparatus and smart operation method of low-voltage generator of hydropower station Download PDFInfo
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- CN106340967A CN106340967A CN201610913624.1A CN201610913624A CN106340967A CN 106340967 A CN106340967 A CN 106340967A CN 201610913624 A CN201610913624 A CN 201610913624A CN 106340967 A CN106340967 A CN 106340967A
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- water level
- guide vane
- vane opening
- power
- electromotor
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J13/00—Circuit arrangements for providing remote indication of network conditions, e.g. an instantaneous record of the open or closed condition of each circuitbreaker in the network; Circuit arrangements for providing remote control of switching means in a power distribution network, e.g. switching in and out of current consumers by using a pulse code signal carried by the network
- H02J13/00001—Circuit arrangements for providing remote indication of network conditions, e.g. an instantaneous record of the open or closed condition of each circuitbreaker in the network; Circuit arrangements for providing remote control of switching means in a power distribution network, e.g. switching in and out of current consumers by using a pulse code signal carried by the network characterised by the display of information or by user interaction, e.g. supervisory control and data acquisition systems [SCADA] or graphical user interfaces [GUI]
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- Human Computer Interaction (AREA)
- Power Engineering (AREA)
- Control Of Water Turbines (AREA)
- Control Of Eletrric Generators (AREA)
Abstract
A smart operation apparatus and a smart operation method of a low-voltage generator of a hydropower station are disclosed. A processor MCU is respectively connected with a simulation sampling circuit and a plurality of level sensors; a communication circuit and a remote monitor host computer for communication; an open-inlet open-outlet circuit, an open-outlet relay and telecommand detection; a protection circuit, a protection execution mechanism and fault recording; a power supply circuit, and a power conditioning circuit and generator guide vanes for adjusting the opening degree; and a memory circuit. The smart operation method includes the steps of detecting the water level of a reservoir on a real-time basis, the processor MCU determining the current water level of the reservoir, automatically adjusting the opening degree of the guide vanes of the low voltage generator, and introducing a negative feedback adjusting mechanism in the real time control of the opening degree of the guide vanes of the low voltage generator. The generating power of the generator is optimized, management and control of the power station is smarter, and power generation is more efficient. Unmanned on duty of a hydropower station and automatic operation are realized.
Description
Technical field:
The invention belongs to technical field of power systems and in particular to a kind of power station low voltage generator intelligent operation device and
Intelligent operation method.
Background technology:
China economy has been enter into new developing period, maintains sustained and rapid growth in national economy, modernization of industry process
While quickening, resource and environment restriction is becoming tight, and nervous situation in energy supply, and eco-environmental pressure persistently increases.
Electric flux, is the energy being produced by different power stations, power system electric station include thermal power station, power station,
Nuclear power station and new energy power station etc., power station is a kind of unique and extensive energy power station, and it mainly uses hydraulic blow side
Formula generates electricity, and in power system architectures, power station not only plays a part to produce electric energy, and it also bears flood control, drought resisting, filling
Irrigate, prevent from destroying ecological environment, reduce environmental pollution, save all multiactions such as non-renewable resources.
Hydroelectric development, by the development of investment pull, tax revenue increase and related service industry, can turn local supplies advantage
It is changed into economic advantages, industrial advantage, other industry developments are driven with this, form the strong industry cluster of support force, strong promotion ground
The development in an all-round way of Fang Jingji.Therefore, greatly develop hydropower one side and be conducive to improving problem of energy crisis, on the other hand have
Beneficial to reducing Rural-urban Gap, improving rural area production and living conditions, for propulsion local agricultural production, improve farmers' income, accelerate
Shake off poverty paces, promote national unity, maintain social stability, there is irreplaceable effect.
Intelligent grid is the inexorable trend of electric power network technique development, is the inevitable choice of socio-economic development, its proposition pushes away
Move the fast development of each correlation technique；Power station, because hydroelectric seasonal nature and its perturbation are it is easy to destroy
The Real-time Balancing of electrical network, the safe operation of impact electrical network, brings and directly affects to the peak regulation of electrical network, tune lotus, therefore, how to fill
The advantage that point utilizes water for producing electric power allows the pipe diameter design in power station reach the requirement of intelligent grid simultaneously again, be one significant but
Problem demanding prompt solution again.
At present, in the construction of hydropower stations of middle and small scale, the control model that most of low voltage generator groups are run is mainly
By low voltage generator protection device and lcu control panel (local control unit) come to realize；Wherein low voltage generator protection dress
Put the start and stop being mainly used in electromotor and protection, lcu control panel be mainly used in the hydraulic turbine, electromotor, subsidiary engine, transformator, bus,
The control of chopper, disconnecting switch, grounding switch etc.；In water power station control system, although low voltage generator protection device and
Lcu screen cabinet can realize automatically controlling and its miscellaneous equipment on-line monitoring and long-range control of low voltage generator to a certain extent
System, but, it is still desirable to power station duty personnel is according to electric station water storage level in generator active power and reactive power are adjusted
Situation judging the output with manual regulator generator, and in the equipment not possessing data recording function at some,
The transient data that breaks down in the power station and its parameter of operation all cannot be preserved it has not been convenient to the maintenance of unit and plant load
Analysis.
So that generating set power is adjusted as a example it is well known that hydroelectric generation, the output of its electromotor is mainly by former dynamic
Power determines, motive power is determined by guide vane opening and height of water level, and that is, guide vane opening is bigger, water level is higher, and motive power is bigger；
Analyze in theory, under the maximum power generation that electromotor itself can bear, lead the output of the bigger electromotor of leaf divergence
Power is bigger, but on the other hand guide vane opening determines the size of water yield again, if that is, water yield is more than cistern upstream
Inflow, then water-retention pool water level can persistently reduce, when being reduced to it and can not produce enough motive power, electromotor was by originally sending out
Power mode switchs to electric motor mode, and whole generating set system is absorbed by grid power, not only can not generate electricity, also can be by electrical network
Power expends in vain, accordingly, it would be desirable to when water level decreasing is to certain value, make cistern by suitable adjustment guide vane opening
Height of water level reaches a dynamic equilibrium, thus obtaining lasting power generation process；During this dynamic equilibrium is adjusted, stator
Aperture is a very crucial controlled quentity controlled variable；In medium waterpower generator station, typically all pass through power station duty personnel to height of water level
Artificial judgement adjusting guide vane opening, its automaticity is relatively low, needs duty personnel's all-weather monitor.
Content of the invention:
The technical problem to be solved is: solves the problems, such as above-mentioned prior art, and provides a kind of water power
Stand low voltage generator intelligent operation device and intelligent operation method, make power station power adjustments automatization, and can be certain
The generated output of electromotor is optimized on degree, makes the pipe diameter design in power station more intelligent, generate electricity more efficient, realize water power
The unmanned stood, fundamentally realizes running automatization.
The technical solution used in the present invention is: a kind of power station low voltage generator intelligent operation device, with 32 dsp monolithics
Machine is processor mcu, and processor mcu connects respectively:
Analog sampling circuit, the outfan of analog sampling circuit connects processor mcu, and the input of analog sampling circuit is even
Connect multiple level sensors of cistern；
Communicating circuit, processor mcu and communicating circuit connecting communication, communication module again with remote monitoring upper machine communication；
Input and output circuit, processor mcu and input and output circuit connection communication, and input and output circuit then continues with outputing
Electrical equipment and remote signalling detection connect；
Protection circuit, the outfan of protection circuit connects protection actuator and failure wave-recording；
Power circuit, power circuit output point two-way, a road connects processor mcu, and another road exports as DC source；
Touch screen, touch screen and processor mcu connection communication.
Power conditioning circuitry, processor mcu and power conditioning circuitry connection communication, power conditioning circuitry output connects and adjusts
Section electromotor guide vane opening；
Storage circuit, processor mcu and memorizer connection communication.
A kind of intelligent operation method based on above-mentioned power station low voltage generator intelligent operation device, power station low pressure generates electricity
Quick-witted energy running gear passes through level sensor sensed water level height, by processor mcu by sentencing to cistern current level
Break to automatically adjust power station low voltage generator guide vane opening, to generated output optimizing regulation: when monitoring that water level rises
Wait, power station low voltage generator intelligent operation device controls increases electromotor guide vane opening, increase water yield so that water level maintains
To a new dynamic equilibrium point, lift generator prime power, increase electromotor water power；When water level decreasing
Power station low voltage generator intelligent operation device controls and reduces guide vane opening, reduces water yield so that water level maintains new moving
State equilibrium point, allows electromotor continuous service in power generation mode, keeps the generated output in power station, so that power station low voltage generator is sent out
Electrical power adjusts automatization, and optimizes the generated output of electromotor.
In technique scheme, concrete grammar is: when displacement and inflow reach balance, guide vane opening is in power station
X, the Water level trend balance height of cistern is h；When upstream discharge of a certain moment increases, intelligent operation device is in the unit interval
Inside monitor that the real time water level h1 of cistern is in propradation, i.e. h1-h > 0 leads leaf divergence then it represents that can increase, increase
The generated output of electromotor；Increase guide vane opening x1 after electromotor guide vane opening is adjusted and can keep water-retention it is necessary to meet
The dynamic equilibrium of pool water level, that is, cistern inflow and water yield are equal, and such guarantee will not be adjusted because of guide vane opening
It has suffered big and water level decreasing occurs；In the same manner, when upstream discharge of a certain moment reduces, intelligent operation device is within the unit interval
Monitor that the real time water level h1 of cistern is in decline state, i.e. h1-h < 0, for keeping electromotor continuous firing in generating state,
Minimizing electromotor is needed to lead leaf divergence, guide vane opening x2 mono- aspect after adjustment needs satisfaction that Water level trend can be kept to put down
Weighing apparatus, on the other hand also needs to meet water level balance point and is not less than warning line point, and this water level point is critical site, if continued
Less than this water level point, generator prime power deficiency is likely to occur absorbed power state；Due to upstream discharge be random it is impossible to
Accurately measure, therefore power station low voltage generator intelligent operation device is measuring water-retention water by cistern level sensor
When the real-time height of position and variation tendency, introduce negative-feedback regu- lation mechanism in electromotor guide vane opening real-time control, by right
When the change of current level measured value judges that upstream discharge increases, first with δ x1 increment, increase guide vane opening in right amount, then
By water level is continued to monitor with the rate of change judging water level after the adjustment, i.e. the change of δ h=h1-h, if raising speed on water level
Degree is δ h > 0 more than 0, then continue to increase guide vane opening with δ x1 increment and continue observed stage, judge that height of water level changes, directly
It is in stability to water level；In the same manner, when upstream discharge reduces, δ x2 is decrement, appropriate with δ x2 decrement first
Reduce electromotor guide vane opening, then by controlling whether persistently to reduce stator to the judgement of SEA LEVEL VARIATION speed δ h=h-h1
Aperture, if drawdown rate of water level is not 0, i.e. δ h > 0, then should continue with δ x2 decrement reduce guide vane opening and continue measure
Water level, judges that height of water level changes, until water level is in stability.
In technique scheme, during adjustment electromotor guide vane opening, concrete operations include:
1. when, water level rises, for realizing the quick water level that adjusts to equilibrium point, first, guide vane opening adjusting step δ x1
Suitably take higher value, if the water level rate of climb is decreased obviously after adjustment, then during subsequent adjustment, should be by adjusting step δ x1
Reduce, finely tune；
2., when water level decreasing, in order to prevent, water level decreasing is too fast motive power deficiency situation, first by electromotor stator
Aperture decreasing amount adjustment step-length δ x2 takes higher value, allows water level be in propradation, then realizes finely tuning by less δ x2 again；
3., the final equilibrium point of electromotor guide vane opening adjustment should be specified height of water level area, i.e. water level balance point, greatly
In warning line point and leave certain nargin, prevent from having little time during water level decreasing to adjust guide vane opening, water level is just low rapidly
In marginal value region, therefore, should be according to the difference of current level and warning line point come with due regard to during each adjustment
The adjusting step of guide vane opening, that is to say, that current level soon reaches when that is, the difference of current level and warning line is less
During warning line it should first adjustment reduce guide vane opening so that cistern can water-retention, water level is controlled first in specified water
Position height area, then increase the adjusting step of guide vane opening in right amount so that current level balances.
In technique scheme, the electromotor stator Rule of judgment that completes of adjustment is SEA LEVEL VARIATION speed δ h is 0, in reality
In the processing procedure of border, δ h can not possibly be accurate 0 value, and the Rule of judgment that therefore present invention completes to adjust is | δ h | < ε, wherein,
ε is a positive number；ε chose conference and reduced degree of regulation；Choose too small can increase water level regulation close to equilibrium point when fine setting
Number of times so that because frequent to guide vane opening adjust and cause the damage of actuator, the therefore selection of ε, need according to reality
Situation and be actually needed to determine.
In technique scheme, multicomputer when power station multiple generator group generates electricity is adjusted, and needs to ensure water-retention pool water level
Balance and every unit balancing the load, therefore when water level rises, the minimum unit of preferential Load adjustment amount；Under water level
When fall, preferential Load adjustment amount highest unit, the loading of every unit is judged by guide vane opening, the load of unit
Measure more big then guide vane opening bigger；During multicomputer adjustment, need to judge the size of unit load amount, every unit connects
Enter the loading signal of other units；Determine the preferential unit adjusting, it is identical with single fighter adjustment that it adjusts process.
The power station low voltage generator intelligent operation device of the present invention and intelligent operation method, are mainly used in power station low pressure
Unit overall-in-one control schema, in addition to being capable of the basic functions such as measurement, protection and the distant place control of low voltage generator, this device
By level sensor come sensed water level height, and then can also be led by automatically adjusting to the judgement of cistern current level
Leaf aperture, thus reach to generated output optimizing regulation function: when monitoring that water level rises, device controls increases stator
Aperture, increasing water yield so that water level maintains a new dynamic equilibrium point thus lifting generator prime power, increasing and generating electricity
Machine water power；When water level decreasing, device controls and reduces guide vane opening, reduces water yield so that water level maintains
New dynamic equilibrium point, allows electromotor continuous service in power generation mode, keeps the generated output in power station.This device can allow water
Power station power adjustments reach automatization, and can optimize the generated output of electromotor in certain degree, allow the pipe in power station
Control pattern is more intelligent, generates electricity more efficient, realizes the unmanned in power station, fundamentally realizes the automatic of operation
Change.
Basic function includes:
1st, four remote control function, i.e. remote measurement, remote signalling, remote control, remote regulating function:
Remote measurement include generator active power, reactive power, power factor (PF), generator terminal electric current, set end voltage, exciting current,
Excitation voltage；Remote signalling includes gate positing, generator terminal circuit breaker position, position of strobe, degaussing switch position, protection signal etc.；Distant
Control includes start and stop remote control etc.；Remote regulating includes generated power and idle.
2nd, detection unit electric fault, mechanical breakdown:
Differential, loss of excitation, vibration including detection electromotor, the fault such as temperature rise is so that electromotor continually and steadily runs.
3rd, monitoring unit load and water level conditions:
Refer mainly to monitor outlet circuit breaker current to obtain load condition, obtained by reading the signal of level sensor
Water-retention pool water level.
4th, fault warning, accidental shutdown, fault data uploads:
After fault warning setting and fault warning, autostop and its fault message upload to background monitoring system.
5th, various malfunctions and tripping are prevented:
6th, water level is automatically opened, is shut down:
The automatic electrical power generators when water level reaches generating water level threshold value, when water level decreasing is to shutdown water level threshold
Autostop during value.
7th, generator protection function:
Including three sections of overcurrent protections of electromotor, electromotor overload protection, electromotor under-voltage protection, electromotor overvoltage
Protection, generator unit stator overtemperature prote, electromotor overfrequency and underfrequency protection etc..
8th, active power automatically adjusts:
Automatically adjust guide vane opening by monitoring cistern real time water level, and then reach to generated output optimizing regulation.
9th, failure wave-recording.
10th, gprs pair when and during network pair.
11st, distant place communication, can support that data uploads and distant place power dispatching.
Brief description:
Fig. 1 is circuit structure block diagram of the present invention；
Fig. 2 is power station low voltage generator single fighter guide vane opening adjustment flow chart；
Fig. 3 is power station low voltage generator multicomputer guide vane opening adjustment flow chart.
Specific embodiment:
Referring to Fig. 1, Fig. 2, Fig. 3, a kind of power station of present invention low voltage generator intelligent operation device, with 32 dsp monolithics
Machine is processor mcu, and processor mcu connects respectively:
Analog sampling circuit, the outfan of analog sampling circuit connects processor mcu, and the input of analog sampling circuit is even
Connect multiple level sensors of cistern；
Communicating circuit, processor mcu and communicating circuit connecting communication, communication module again with remote monitoring upper machine communication；
Input and output circuit, processor mcu and input and output circuit connection communication, and input and output circuit then continues with outputing
Electrical equipment and remote signalling detection connect；
Protection circuit, the outfan of protection circuit connects protection actuator and failure wave-recording；
Power circuit, power circuit output point two-way, a road connects processor mcu, and another road exports as DC source；
Touch screen, touch screen and processor mcu connection communication.
Power conditioning circuitry, processor mcu and power conditioning circuitry connection communication, power conditioning circuitry output connects and adjusts
Section electromotor guide vane opening；
Storage circuit, processor mcu and memorizer connection communication.
A kind of intelligent operation method based on above-mentioned power station low voltage generator intelligent operation device, power station low pressure generates electricity
Quick-witted energy running gear passes through level sensor sensed water level height, by processor mcu by sentencing to cistern current level
Break to automatically adjust power station low voltage generator guide vane opening, to generated output optimizing regulation: when monitoring that water level rises
Wait, power station low voltage generator intelligent operation device controls increases electromotor guide vane opening, increase water yield so that water level maintains
To a new dynamic equilibrium point, lift generator prime power, increase electromotor water power；When water level decreasing
Power station low voltage generator intelligent operation device controls and reduces guide vane opening, reduces water yield so that water level maintains new moving
State equilibrium point, allows electromotor continuous service in power generation mode, keeps the generated output in power station, so that power station low voltage generator is sent out
Electrical power adjusts automatization, and optimizes the generated output of electromotor；Concrete grammar is: power station reaches in displacement and inflow
During balance, guide vane opening x, the Water level trend balance height of cistern is h；When upstream discharge of a certain moment increases, intelligence
Running gear monitors that within the unit interval real time water level h1 of cistern is in propradation, i.e. h1-h > 0 is then it represents that permissible
Leaf divergence is led in increasing, increases the generated output of electromotor；Increase electromotor guide vane opening adjust after guide vane opening x1 it is necessary to
Meet the dynamic equilibrium that can keep water-retention pool water level, that is, cistern inflow and water yield are equal, such guarantee
Because guide vane opening adjustment is excessive, water level decreasing will not occur；In the same manner, when upstream discharge of a certain moment reduces, intelligence is transported
Luggage is put and is monitored that within the unit interval real time water level h1 of cistern is in decline state, i.e. h1-h < 0, for keeping electromotor
Continuous firing is in generating state, it is desirable to reduce leaf divergence led by electromotor, and guide vane opening x2 mono- aspect after adjustment needs to meet
Water level trend can be kept to balance, on the other hand also need to meet water level balance point and be not less than warning line point, this water level point is
Critical site, if being consistently less than this water level point, generator prime power deficiency is likely to occur absorbed power state；Due to upstream
Discharge is random it is impossible to accurate measure, and therefore power station low voltage generator intelligent operation device is by water-retention pool water level
When sensor is to measure the real-time height of water-retention pool water level with variation tendency, negative to introducing in electromotor guide vane opening real-time control
Feed-back regulatory mechanism, when by the change of current level measured value is judged with upstream discharge increases, is increased with δ x1 first
Amount is appropriate to increase guide vane opening, then by water level is continued to monitor with the rate of change judging water level after the adjustment, i.e. δ h=h1-h
Change, if the water level rate of climb is more than 0, i.e. δ h > 0, then continue to increase guide vane opening continue observation water with δ x1 increment
Position, judges that height of water level changes, until water level is in stability；In the same manner, when upstream discharge reduces, δ x2 is to subtract
Amount, reduces electromotor guide vane opening with δ x2 for decrement first in right amount, then by the judgement to SEA LEVEL VARIATION speed δ h=h-h1
Lead leaf divergence to control whether persistently to reduce, if drawdown rate of water level is not 0, i.e. δ h > 0, then should continue with δ x2 decrement
Reduce guide vane opening and continue to measure water level, judge that height of water level changes, until water level is in stability.
During adjustment electromotor guide vane opening, concrete operations include:
1., when, water level rises, for realizing the quick water level that adjusts to equilibrium point, guide vane opening adjusting step δ x1 first fits
When taking higher value, if the water level rate of climb is decreased obviously after adjustment, then during subsequent adjustment, adjusting step δ x1 should be subtracted
Few, finely tune；
2., when water level decreasing, in order to prevent, water level decreasing is too fast motive power deficiency situation, first by electromotor stator
Aperture decreasing amount adjustment step-length δ x2 takes higher value, allows water level be in propradation, then again by less decrement δ x2 Lai real
Now finely tune；
3., the final equilibrium point of electromotor guide vane opening adjustment should be specified height of water level area, i.e. water level balance point, greatly
In warning line point and leave certain nargin, prevent from having little time during water level decreasing to adjust guide vane opening, water level is just low rapidly
In marginal value region, therefore, should be according to the difference of current level and warning line point come with due regard to during each adjustment
The adjusting step of guide vane opening, that is to say, that current level soon reaches when that is, the difference of current level and warning line is less
During warning line it should first adjustment reduce guide vane opening so that cistern can water-retention, water level is controlled first in specified water
Position height area, then increase the adjusting step of guide vane opening in right amount so that current level balances.
The Rule of judgment that the adjustment of electromotor stator completes is SEA LEVEL VARIATION speed δ h is 0, in actual process, δ h
Can not possibly be accurate 0 value, the Rule of judgment of therefore adjustment is | δ h | < ε, and wherein, ε is a positive number；ε chose conference fall
High adjustment precision；Choose too small can increase water level regulation close to equilibrium point when fine setting number of times so that because to guide vane opening frequency
Numerous regulation and cause the damage of actuator, the therefore selection of ε, need to be determined according to practical situation and being actually needed；Water power
Multicomputer when multiple generator group of standing generates electricity is adjusted, and needs to ensure the balance of water-retention pool water level and the balancing the load of every unit,
Therefore when water level rises, the minimum unit of preferential Load adjustment amount；In water level decreasing, preferential Load adjustment amount highest
Unit, the loading of every unit is judged by guide vane opening, and the more big then guide vane opening of loading of unit is bigger；Many
During unit adjustment, need to judge the size of unit load amount, every unit accesses the loading signal of other units；Determine
The preferential unit adjusting, it is identical with single fighter adjustment that it adjusts process.
The built-up circuit of 1 couple of present invention is described further below in conjunction with the accompanying drawings:
(1) processor mcu
Processor mcu is the computing of device, troubleshooting, the nucleus module of communication, primarily serve the purpose of analog acquisition amount
Accurately calculating, intake scanning, the logical judgment of protective number, device Communication processing, data storage etc., are the processes of plant running
In various information exchanges and input and output and its all control commands core.
(2) analog sampling circuit
Major function is device to ia, ib, ic, ua, ub, uc, cos ф, f of low-tension unit three-phase alternating current and its water power
Stand the filtering of analog quantity and the samplings such as water-retention pool water level h.Module includes alternating current, voltage and its level measuring circuit, a side
It is weak electric signal that face is used for secondary system side electric current, voltage conversion, is conveyed to mcu module and carries out ad conversion, and plays strong and weak electricity
Buffer action；On the other hand it is used for for cistern water level signal being converted into simulation electric potential signal, be transported to mcu module and carry out a/d
Conversion；Through accurately calculating the exact value of voltage x current and water level in mcu.
(3) input and output circuit
Major function for device remote signalling open into the signals such as collection, remote signalling displacement, accident remote signalling, normal remote control provide interface and
Its measure loop, at most can support 32 tunnel intakes and the 9 road amounts of outputing, and open incoming interface voltage support ac/dc220v.
(4) protection circuit
Major function provides trip protection Acquisition Circuit and exit circuit for device, and Acquisition Circuit is electric by secondary system side
Stream, voltage conversion are weak electric signal, are conveyed to mcu module and carry out ad conversion, and play strong and weak electricity buffer action；Tripping operation exit circuit
Main offer device trip(ping) circuit, provides, for the control chopper in power station, outlet of tripping when a failure occurs.Protection module can be real
Existing low voltage generator protection, protects including fast tripping protection, three sections of overcurrent protections, inverse-time overcurrent protection, stator overload, overvoltage
Shield, frequency anomaly protection etc..
(5) power circuit
The outside AC and DC power supply providing is converted to protection device work required voltage by power module, output+5v, ±
9v and+24v, is plant running power plant module.
(6) communicating circuit
Predominantly device provides 485 communications, tcp/ip communication interface and peripheral circuit, facilitate device and external devices or
Upper machine communication, the data that gather device and fault message produce and its accept remote operation order, realize device remote control work(
Energy.
(7) touch screen
The 32 arm chip microcontroller produced by PHILIPS Co., speed is fast, and piece internal storage capacity is big, network interface energy
Power is strong, and using real-time multi-task operating system, the real-time such as interface, network is good, and major function is man-machine for device offer close friend's
Interactive interface, the data message that device is gathered shows, and provide touch be manually entered, can conveniently change device
Protection and communications parameter.
(8) power conditioning circuitry
Major function is that device provides Power Control outlet, is put down by the control of guide vane opening amount is adjusted with power station power
Weighing apparatus point is thus the active power optimizing power station reaches the effect of improve generating efficiency.
(9) storage circuit
Major function is the storage of device gathered data information and its systematic parameter, and gathered data information includes history remote signalling
Displacement information, failure wave-recording shape information, fault trip information, fault warning information etc., systematic parameter includes protecting soft pressing plate, leads to
News parameter, protection seting parameter etc.；Memory module can preserve no less than 500 recent occurrence part reports and run report,
At least support 10 sets of protection definite value storages and change.
Claims (6)
1. a kind of power station low voltage generator intelligent operation device it is characterised in that: with 32 dsp single-chip microcomputers for processor mcu,
Processor mcu connects respectively:
Analog sampling circuit, the outfan of analog sampling circuit connects processor mcu, and the input of analog sampling circuit connects storage
Multiple level sensors in pond；
Communicating circuit, processor mcu and communicating circuit connecting communication, communication module again with remote monitoring upper machine communication；
Input and output circuit, processor mcu and input and output circuit connection communication, and input and output circuit then with output relay
And remote signalling detection connects；
Protection circuit, the outfan of protection circuit connects protection actuator and failure wave-recording；
Power circuit, power circuit output point two-way, a road connects processor mcu, and another road exports as DC source；
Touch screen, touch screen and processor mcu connection communication.
Power conditioning circuitry, processor mcu and power conditioning circuitry connection communication, power conditioning circuitry output connects and adjusts to be sent out
Motor guide vane opening；
Storage circuit, processor mcu and memorizer connection communication.
2. a kind of intelligent operation method as claim 1 power station low voltage generator intelligent operation device it is characterised in that: water
Power station low voltage generator intelligent operation device passes through level sensor sensed water level height, by processor mcu by cistern
The judgement of current level automatically adjusting power station low voltage generator guide vane opening, to generated output optimizing regulation: when monitoring
When water level rises, power station low voltage generator intelligent operation device controls increases electromotor guide vane opening, increases water yield,
Make water level maintain a new dynamic equilibrium point, lift generator prime power, increase electromotor water power；Work as water
When position declines, power station low voltage generator intelligent operation device controls and reduces guide vane opening, reduces water yield so that water level
Maintain new dynamic equilibrium point, allow electromotor continuous service in power generation mode, keep the generated output in power station, make power station
Low voltage generator generated output adjusts automatization, and optimizes the generated output of electromotor.
3. intelligent operation method according to claim 2 it is characterised in that: concrete grammar is: power station in displacement and
When inflow reaches balance, guide vane opening is x, and the Water level trend balance height of cistern is h；When upstream discharge of a certain moment
During increase, intelligent operation device monitors that within the unit interval real time water level h1 of cistern is in propradation, i.e. h1-h > 0,
Then represent to increase and lead leaf divergence, increase the generated output of electromotor；Increase the stator after electromotor guide vane opening is adjusted
, it is necessary to satisfaction can keep the dynamic equilibrium of water-retention pool water level, that is, cistern inflow and water yield are equal for aperture x1, this
Will not water level decreasing because guide vane opening adjustment is excessive in sample guarantee；In the same manner, when upstream discharge of a certain moment subtracts
When few, intelligent operation device monitors that within the unit interval real time water level h1 of cistern is in decline state, i.e. h1-h < 0 is
Keep electromotor continuous firing in generating state, it is desirable to reduce leaf divergence led by electromotor, guide vane opening x2 mono- side after adjustment
Face needs satisfaction that Water level trend can be kept to balance, and on the other hand also needs to meet water level balance point and is not less than warning line point,
This water level point is critical site, if being consistently less than this water level point, generator prime power deficiency is likely to occur absorbed power shape
State；Because upstream discharge is random it is impossible to accurate measure, therefore power station low voltage generator intelligent operation device is passing through
When cistern level sensor is to measure the real-time height of water-retention pool water level with variation tendency, electromotor guide vane opening is controlled in real time
Negative-feedback regu- lation mechanism is introduced in system, when by the change of current level measured value is judged with upstream discharge increases, first
First guide vane opening is increased in right amount with δ x1 increment, then by the rate of change judging water level after the adjustment is continued to monitor to water level,
The i.e. change of δ h=h1-h, if the water level rate of climb is more than 0, i.e. δ h > 0, then continues to increase guide vane opening with δ x1 increment
And continue observed stage judge height of water level change, until water level is in stability；In the same manner, upstream discharge reduces
When, δ x2 is decrement, reduces electromotor guide vane opening in right amount with δ x2 decrement first, then by SEA LEVEL VARIATION speed δ h=
The judgement of h-h1 leads leaf divergence to control whether persistently to reduce, if drawdown rate of water level is not 0, i.e. δ h > 0, should continue with
δ x2 decrement reduce guide vane opening and continue measure water level judge water level, height change, until water level is in stability.
4. intelligent operation method according to claim 2 it is characterised in that: 1., water level rise when, for realizing fast velocity modulation
Whole water level suitably takes higher value to equilibrium point, first guide vane opening adjusting step δ x1, if the water level rate of climb is bright after adjustment
Aobvious decline, then should reduce adjusting step δ x1 during subsequent adjustment, finely tune；
2., when water level decreasing, in order to prevent, water level decreasing is too fast motive power deficiency situation, first by electromotor guide vane opening
Decreasing amount adjustment step-length δ x2 takes higher value, allows water level be in propradation, is then realized micro- again by less decrement δ x2
Adjust；
3., the final equilibrium point of electromotor guide vane opening adjustment should be specified height of water level area, and that is, water level balance point is more than police
Guard against water level point and leave certain nargin, prevent from having little time during water level decreasing to adjust guide vane opening, water level just face by rapid being less than
Dividing value region, therefore, during each adjustment in requisition for according to the difference of current level and warning line point come with due regard to
The adjusting step of guide vane opening, that is to say, that current level soon reaches when that is, the difference of current level and warning line is less
During warning line it should first adjustment reduce guide vane opening so that cistern can water-retention, water level is controlled first in specified water
Position height area, then increase the adjusting step of guide vane opening in right amount so that current level balances.
5. intelligent operation method according to claim 2 it is characterised in that: the electromotor stator Rule of judgment that completes of adjustment
Be SEA LEVEL VARIATION speed δ h be 0, in actual process, δ h can not possibly for accurate 0 value, therefore complete adjust judgement
Condition is | δ h | < ε, and wherein, ε is a positive number；ε chose conference and reduced degree of regulation；Selection is too small to increase water level regulation
Close to equilibrium point when fine setting number of times so that causing the damage of actuator because of adjust to guide vane opening frequent, therefore ε
Choose, need to be determined with being actually needed according to practical situation.
6. intelligent operation method according to claim 2 it is characterised in that: power station multiple generator group generate electricity when multimachine
Group regulation, needs to ensure the balance of water-retention pool water level and the balancing the load of every unit, therefore when water level rises, preferential adjustment
The minimum unit of loading；In water level decreasing, preferential Load adjustment amount highest unit, the loading of every unit is passed through
Judging, the more big then guide vane opening of loading of unit is bigger for guide vane opening；During multicomputer adjustment, need judgement machine
The size of group loading, every unit accesses the loading signal of other units；Determine the preferential unit adjusting, it adjusts process
Identical with single fighter adjustment.
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| CN110460117A (en) * | 2019-09-05 | 2019-11-15 | 湖南江河机电自动化设备股份有限公司 | A kind of middle small plant's intelligent optimization electricity generation system |
| CN116979623A (en) * | 2023-09-22 | 2023-10-31 | 湖南江河能源科技股份有限公司 | Hydropower station autonomous optimization power generation control strategy |
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