CN107762581A - A kind of screw expansion generating set full-automatic control system and method - Google Patents
A kind of screw expansion generating set full-automatic control system and method Download PDFInfo
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- CN107762581A CN107762581A CN201711227259.XA CN201711227259A CN107762581A CN 107762581 A CN107762581 A CN 107762581A CN 201711227259 A CN201711227259 A CN 201711227259A CN 107762581 A CN107762581 A CN 107762581A
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- 238000000034 method Methods 0.000 title claims abstract description 8
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 60
- 238000001816 cooling Methods 0.000 claims abstract description 39
- 238000001514 detection method Methods 0.000 claims abstract description 30
- 230000001050 lubricating effect Effects 0.000 claims abstract description 10
- 239000003921 oil Substances 0.000 claims description 44
- 239000007788 liquid Substances 0.000 claims description 36
- 230000005284 excitation Effects 0.000 claims description 21
- 238000005461 lubrication Methods 0.000 claims description 18
- 239000000446 fuel Substances 0.000 claims description 14
- 230000008676 import Effects 0.000 claims description 14
- 239000012530 fluid Substances 0.000 claims description 12
- 230000005611 electricity Effects 0.000 claims description 8
- 239000000523 sample Substances 0.000 claims description 7
- 239000000498 cooling water Substances 0.000 claims description 6
- 239000004519 grease Substances 0.000 claims description 6
- 230000001105 regulatory effect Effects 0.000 claims description 6
- 238000012544 monitoring process Methods 0.000 claims description 5
- 238000006073 displacement reaction Methods 0.000 claims description 3
- 238000004321 preservation Methods 0.000 claims description 3
- 230000004044 response Effects 0.000 claims description 3
- 238000006243 chemical reaction Methods 0.000 claims description 2
- 238000001704 evaporation Methods 0.000 claims description 2
- 239000010687 lubricating oil Substances 0.000 claims description 2
- 238000010248 power generation Methods 0.000 claims description 2
- 230000008901 benefit Effects 0.000 abstract description 4
- 230000009897 systematic effect Effects 0.000 abstract 1
- QGJOPFRUJISHPQ-UHFFFAOYSA-N Carbon disulfide Chemical compound S=C=S QGJOPFRUJISHPQ-UHFFFAOYSA-N 0.000 description 3
- 241000208340 Araliaceae Species 0.000 description 2
- 235000005035 Panax pseudoginseng ssp. pseudoginseng Nutrition 0.000 description 2
- 235000003140 Panax quinquefolius Nutrition 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 235000008434 ginseng Nutrition 0.000 description 2
- 239000002918 waste heat Substances 0.000 description 2
- 230000005540 biological transmission Effects 0.000 description 1
- 230000001276 controlling effect Effects 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 230000007246 mechanism Effects 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 238000011084 recovery Methods 0.000 description 1
- 229920006395 saturated elastomer Polymers 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
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Abstract
The present invention relates to a kind of full-automatic control system of screw expansion generating set and method,Including central control room upper computer,Self-checking system,Subsidiary engine lubricating system,Cooling circulating water system,Thermal source control system,Tank level control system,Control pressurer system,Main air intake control system,Screw expander system,Exciter control system,Automatic presynchronization system,Protect fling-cut system,Fault detection system and data collecting system,One-key start button is set in central control room upper computer,Systematic order automatic start successively,When a upper system breaks down,Fault detection system, which can alarm and terminate next system, to be started,Until the next system of failture evacuation mouth can just start,The single generating set of full-automatic control system of the present invention only needs regular visit,Nursed without special messenger,In the case of ensureing screw expansion generating set safe and stable operation,Reduce personnel cost,Realize one-key start and round-the-clock unattended,Improve the economic benefit of unit.
Description
Technical field
The present invention relates to a kind of power generation control, and in particular to a kind of screw expansion generating set Automatic Control system
System, the invention further relates to the control method of the system.
Background technology
Substantial amounts of cryogenic waste heat resource will be produced in carbon disulfide industrial processes, is not obtained well effectively
Recycle, not only waste the energy, also cause thermal pollution to become serious environmental problem.In organic Rankine bottoming cycle generator
In group, screw expansion generating set is using relatively broad at present, and its main advantage is that to solve traditional turbine maintenance costly,
System is more complicated, it is impossible to be used in the problem of saturated vapor and moist steam.
Currently used screw expansion generating set, can effective recovery waste heat resource, but due to residual heat resources often
Total amount is big, and single amount is small and arrangement is scattered, so screw expansion generating set unit installed capacity is smaller, operating mechanism is single hair
The people of group of motors 6 works in three shifts, it is necessary to special messenger opens shield, adds the financial burden of enterprise.
The content of the invention
It is single it is an object of the invention to provide a kind of screw expansion generating set full-automatic control system for the above situation
Individual generating set only needs regular visit, is nursed without special messenger, ensures screw expansion generating set safe and stable operation
In the case of, personnel cost is reduced, one-key start and round-the-clock unattended is realized, improves the economic benefit of unit.
The screw expansion generating set full-automatic control system of the present invention, including central control room upper computer, for swollen to screw rod
The data of swollen generating set are collected, and preservation is judged and is controlled, and a key is provided with the central control room upper computer
Start button；
Automatic checkout system：The liquid level in fluid reservoir is detected by the liquid tank level meter in fluid reservoir, and transmit to
Central control room upper computer, the oil level in oil water separator is detected and transmitted by the oil eliminator liquid level gauge in oil eliminator
To central control room upper computer, detected by the state of the scram button to cutting-in control cabinet and be sent to central control room upper computer,
Central control room upper computer is analyzed data and fluid reservoir, oil eliminator and scram button is controlled according to the value of setting；
Auxiliary lubricating system：By the pressure fuel pump sensor that rotor lubrication fuel pump outlet is set to rotor lubrication fuel pump outlet pressure
Power is measured and transmitted to central control room upper computer, by the speed probe that is set on screw expander to screw expander
Rotating speed is measured and transmitted to central control room upper computer, central control room upper computer determines lubricating oil according to the rotating speed of screw expander
Whether pump starts；
Cooling water recirculation system：The water level in cooling circulating water pond is measured by the water-level gauge in cooling circulating water pond,
Water temperature is measured by pond thermometer and carries out data transfer to central control room upper computer, central control room upper computer logarithm value
Judge to be controlled cooling circulating water pond, water circulating pump, cooling blower and frequency-variable controller；
Thermal source control system：The heat source import thermometer and thermal source set on pipeline by screw expansion generating set thermal source goes out
The temperature that mouth thermometer is imported and exported to thermal source is measured, and sends data to central control room upper computer, and central control room upper computer is led to
Cross and the thermal source inlet and outlet temperature difference is judged, determine in the unlatching and thermal source outlet pipeline of heat source import pipeline regulating valve by thermal source
The regulation of road regulating valve；
Tank level control system：By the liquid level sensor that is set in evaporator to the level gauging of evaporator, central control room upper computer
The rotating speed of working medium pump is controlled by frequency-variable controller；
Control pressurer system：By pressure measxurement of the evaporating pressure sensor to evaporator and to send data to Central Control Room upper
Machine, central control room upper computer is to the bypass motorized adjustment valve regulation on the evaporator discharge pipeline；
Main air intake control system：System time detects screw expander rotating speed, is controlled according to start-up phase sets requirement, when
After generator connecting in parallel with system, according to setting power, screw expander system charge flow rate is controlled by adjusting main air inlet adjustment valve；
Screw expander system：Screw expander system is connected with central control room upper computer control, and the rotating speed of screw expander is entered
Row monitors and sends corresponding instruction；
Exciter control system：Exciter control system is arranged inside cutting-in control cabinet, and the cutting-in control cabinet panel is provided with anxious
Stop button, the exciter control system includes the detection means of excitation controller, excitation voltage and exciting current, and Central Control Room passes through
Excitation voltage and exciting current are adjusted after being detected to line voltage and generator voltage for the detection means, middle control
Room host computer controls the startup of exciter control system according to the rotating speed of screw expander；
Automatic presynchronization system：Central control room upper computer controls the startup of automatic presynchronization system according to the rotating speed of screw expander,
When the frequency of generator and power network, voltage, phase angle meet grid-connected conditions, automatic presynchronization system sends grid-connected instruction, complete
Into grid-connected；
Protect fling-cut system：After the completion of automatic presynchronization system grid connection, manual switching to protection fling-cut system interface；
Fault detection system：To the startup of whole screw expansion generating set and operation phase complete monitoring, when operational factor deviates
During setting value, system can be automatically adjusted according to pre-set program；
Data collecting system：Whole screw expansion generating set is started and operation phase whole record related data is so as to middle control
Room host computer makes instruction to said system.
Preferably, the protection switching interface is arranged on cutting-in control cabinet panel, by manually protecting switching.
Preferably, after a upper system safe and stable operation, next system is just allowed to start each system, increases
The security of strong system of knowing clearly.
A kind of screw expansion generating set control method for fully automatic, it is characterised in that：
1）Open central control room upper computer one-key start button, automatic checkout system according to the detection project of program setting carry out according to
Secondary detection, detection project is liquid tank level >=600mm of liquid tank level meter detection, the oil that oil eliminator liquid level gauge detects
From device oil level >=400mm, the state of the scram button on cutting-in control cabinet panel；
2）Treat step 1）Instruction complete and feed back to central control room upper computer after, automatic start subsidiary engine lubricating system：Screw expansion
The data that machine bearing grease pump detects according to pressure fuel pump sensor are made a response, when fuel pump outlet sets pressure 0.5MPa then
Automatically adjust flow of lubrication；The rotor lubrication oil pump moment detects screw expander system rotation situation, when detecting that screw rod is swollen
When swollen machine rotating speed reaches 100rpm, rotor of screw expander grease pump automatic start；
3）Cooling circulating water system starts：Automatic identification cooling circulating water pool water level, and being automatically replenished, radiator thermometer and
The data that cistern water level meter is detected to the temperature and water level of cooling water circulation pond reclaimed water determine to act in next step, work as cooling
Recirculated water intake≤30 DEG C when, start water circulating pump and cooling blower, when cooling circulating water intake≤30 DEG C when, pass through frequency conversion control
Cooling blower processed, cooling blower electric machine frequency is reduced, reduce system from power consumption；
4）After described cooling circulating water system normally starts, start thermal source control system：Gradually open heat source import regulation
Valve opening is preheated to screw expansion generating set to program setting initial value 20%, when thermal source imports and exports the temperature difference≤3 DEG C,
It is considered as preheating to complete, unit enters next step startup program, and after unit start, thermal source control system goes out according to the thermal source of setting
Mouth temperature adjustment thermal source bypass valve aperture, and monitored in real time；
5）After the completion of unit preheating, start tank level control system and control pressurer system, automatic start working medium pump, working medium pump pass through
VFC, using positive displacement twin-screw working medium pump.System detects the liquid level of evaporator by evaporator liquid level gauge, when liquid level height
When degree reaches setting value 350mm, working medium pump passes through its rotating speed of Frequency Converter Control；Evaporator pressure sensor detects evaporator pressure
When power reaches setting value 1.2MPa, electric control valve is bypassed by adjusting, maintains evaporator pressure, and start main air inlet control system
System；
6）Main air intake control system starts, and controls screw expander rotating speed by adjusting screw rod expanding machine air inlet adjustment valve, is
System detects screw expander rotating speed by the speed probe moment, is controlled according to start-up phase sets requirement, works as generator
After grid-connected, according to setting power, screw expander system charge flow rate is controlled by adjusting main air inlet adjustment valve；
7）Screw expander system starts：According to the screw expander start-up phase of setting, screw expander rotating speed is according to working medium
Tolerance size automatically adjusts, and the first stage is warm-up phase：It is 100rpm to control screw expander rotating speed, when screw expander turns
When speed reaches 100rpm, subsidiary engine lubricating system starts rotor lubrication oil pump simultaneously；Second stage is ramp-up stage, screw expander
Automatic raising speed is to 1350rpm；Phase III is the grid-connected stage, and screw expander is by adjusting charge flow rate, by screw expander
Rotating speed maintains 1500rpm；
9）When screw expander electricity generation system rotating speed reaches 1350rpm, automatic start exciter control system, described excitation control
System processed adjusts excitation voltage and exciting current according to detection line voltage and generator voltage, after the completion of grid-connected, excitation control
System processed is constantly in working condition, and excitation voltage and exciting current are adjusted according to the generator power factor of setting；
10）When screw expander electricity generation system rotating speed reaches 1500rpm, automatic start automatic presynchronization system.Pass through detection
The frequency of generator and power network, voltage, phase angle, adjust main air inlet adjustment valve, when frequency, voltage, the phase of generator and power network
During parallactic angle load grid-connected conditions, described automatic presynchronization system sends grid-connected instruction, completes grid-connected；
11）After the completion of grid-connected, manual switching to protection switching interface, the every protection of artificial input, mainly includes as needed：It is inverse
Power is protected, and liquid tank level protection, the protection of oil eliminator oil level, generator overspeed protection, the protection of generator overpower, is generated electricity
The switchings such as machine overcurrent protection, the protection of generator low speed, evaporator overpressure protection, condenser overpressure protection；
12）After start completion, the system of screw expansion generating set can automatic running.When fault detection system detects operation ginseng
When number deviates setting value, system can be automatically adjusted according to pre-set program, if there is the system failure or monitoring
Index exceedes limit value, can be shut down automatically according to startup program reverse-order to protect system, data collecting system is to whole
Screw expansion generating set starts and operation phase whole record related data is so that central control room upper computer is made to said system
Instruction.
The full-automatic control system of the present invention is to combine screw expansion generating set technological requirement and manually starting step by step
On the basis of, using automatic control control technology, and to control logic relation therein using the full-automatic chain and side of automatically controlling
Method, one-key start and round-the-clock unattended operation can be achieved, and after each subsystem safe and stable operation, next system is
It is allowed to start, not only increases the security of system, while also reduce the operating cost of screw expansion generating set, improves
Economic benefit.
Brief description of the drawings
Fig. 1 is the structure chart of full-automatic control system of the present invention；
Fig. 2 is full-automatic control system Booting sequence figure of the present invention；
Fig. 3 is screw expansion generating set process chart of the present invention；
1 in figure, heat source import regulating valve；2nd, evaporator；3rd, main air inlet adjustment valve；4th, screw expander；5th, generator；6th, it is grid-connected
Switch board；7th, thermal source bypass valve；8th, rotor lubrication oil pump；9th, bearing oil pump；10th, oil eliminator；11st, wind is cooled down
Machine；12nd, condenser；13rd, water circulating pump；14th, cooling circulating water pond；15th, working medium pump；16th, fluid reservoir；17th, evaporator liquid level gauge；
18th, oil eliminator liquid level gauge；19th, liquid tank level meter；20th, speed probe；21st, condenser pressure sensor；22nd, water tank temperature
Degree meter；23rd, pressure fuel pump sensor；24th, evaporator pressure sensor；25th, electric control valve is bypassed；26th, cistern water level device；
27th, heat source import thermometer；28th, thermal source outlet temperature meter.
Embodiment
As shown in Figure 1, Figure 2, Figure 3 shows, a kind of screw expansion generating set full-automatic control system, including Central Control Room are upper
Machine, for being collected to the data of screw expansion generating set, preservation is judged and is controlled, and the Central Control Room is upper
One-key start button is provided with machine；
Automatic checkout system：The liquid level in fluid reservoir 16 is detected by the liquid tank level meter 19 in fluid reservoir 16, and
Transmit to central control room upper computer, the oil level in oil water separator 10 is entered by the oil eliminator liquid level gauge 18 in oil eliminator 10
Row is detected and transmitted to central control room upper computer, is detected and is sent to by the state of the scram button to cutting-in control cabinet 6
Central control room upper computer, central control room upper computer are analyzed data and according to the value of setting to fluid reservoir, oil eliminator 10 and anxious
Stop button to be controlled；
Auxiliary lubricating system：The pressure fuel pump sensor 23 set by the outlet of rotor lubrication oil pump 8 is to rotor lubrication oil pump 8
Outlet pressure is measured and transmitted to central control room upper computer, by the speed probe 20 that is set on screw expander 4 to spiral shell
The rotating speed of bar expanding machine 4 is measured and transmitted to central control room upper computer, and central control room upper computer is according to the rotating speed of screw expander 4
To determine whether rotor lubrication oil pump 8 starts；
Cooling water recirculation system：By the cistern water level meter 26 in cooling circulating water pond 14 to the water level in cooling circulating water pond 14
Measure, the water temperature of cooling circulating water pond 14 is measured by radiator thermometer 22 and data transfer is upper to Central Control Room
Machine, central control room upper computer logarithm value are judged to be controlled cooling circulating water pond 14, water circulating pump 13, cooling blower 11；
Thermal source control system：The heat source import thermometer 27 and thermal source set on pipeline by screw expansion generating set thermal source
The temperature that outlet temperature meter 28 is imported and exported to thermal source measures, and sends data to central control room upper computer, and Central Control Room is upper
Machine is judged by importing and exporting the temperature difference to thermal source, in the unlatching and thermal source outlet pipeline for determining heat source import pipeline regulating valve 27
The regulation of thermal source bypass valve 7；
Tank level control system：By the evaporator liquid level gauge 17 of setting in evaporator 2 to the level gauging of evaporator 2, Central Control Room
Host computer is controlled by frequency-variable controller to the rotating speed of working medium pump 15；
Control pressurer system：By pressure measxurement of the evaporator pressure sensor 24 to evaporator 2 and send data to middle control
Room host computer, central control room upper computer are adjusted to the bypass electric control valve 7 on the discharge duct of evaporator 2；
Main air intake control system：The moment of rotor lubrication oil pump 8 detects the rotating speed of screw expander 4, according to start-up phase sets requirement
It is controlled, after generator 5 is grid-connected, according to setting power, the system of screw expander 4 is controlled by adjusting main air inlet adjustment valve 3
System charge flow rate；
Screw expander system：Screw expander system is connected with central control room upper computer control, and the rotating speed of screw expander 1 is entered
Row monitors and sends corresponding instruction；
Exciter control system：Exciter control system is arranged inside cutting-in control cabinet 6, and the cutting-in control cabinet panel is provided with anxious
Stop button, the exciter control system includes the detection means of excitation controller, excitation voltage and exciting current, and Central Control Room passes through
Excitation voltage and exciting current are adjusted after being detected to line voltage and generator voltage for the detection means, middle control
Room host computer controls the startup of exciter control system according to the rotating speed of screw expander；
Automatic presynchronization system：Central control room upper computer controls the startup of automatic presynchronization system according to the rotating speed of screw expander 4,
When the frequency of generator 5 and power network, voltage, phase angle meet grid-connected conditions, automatic presynchronization system sends grid-connected instruction, complete
Into grid-connected；
Protect fling-cut system：After the completion of automatic presynchronization system grid connection, manual switching to protection fling-cut system interface；
Fault detection system：To the startup of whole screw expansion generating set and operation phase complete monitoring, when operational factor deviates
During setting value, system can be automatically adjusted according to pre-set program；
Data collecting system：Whole screw expansion generating set is started and operation phase whole record related data is so as to middle control
Room host computer makes instruction to said system.
When it is implemented, 1）The one-key start button of central control room upper computer is opened, automatic checkout system is according to program setting
Detection project detected successively, detection project be liquid tank level meter 19 detect 16 liquid levels of fluid reservoir >=600mm, oil
10 oil levels of the oil eliminator >=400mm detected from device liquid level gauge 18, the state of the scram button on the panel of cutting-in control cabinet 6；
2）Treat step 1）Instruction complete and feed back to central control room upper computer after, automatic start subsidiary engine lubricating system：Screw expansion
The data that machine rotor grease pump 8 detects according to pressure fuel pump sensor 23 are made a response, when fuel pump outlet sets pressure
0.5MPa then automatically adjusts flow of lubrication；The moment of rotor lubrication oil pump 8 detects screw expander system rotation situation, works as detection
When reaching 100rpm to the rotating speed of screw expander 4, rotor of screw expander grease pump automatic start；
3）Cooling circulating water system starts：The water level of automatic identification cooling circulating water pond 14, and be automatically replenished, radiator thermometer
22 and the data that are detected to the temperature and water level of the reclaimed water of cooling water circulation pond 4 of cistern water level meter 26 determine it is dynamic in next step
Make, when cooling circulating water intake≤30 DEG C when, start water circulating pump 13 and cooling blower 11, when cooling circulating water is intake≤30 DEG C
When, by VFC cooling blower 11, the electric machine frequency of cooling blower 11 is reduced, reduces system from power consumption；
4）After described cooling circulating water system normally starts, start thermal source control system：Gradually open heat source import regulation
The aperture of valve 1 preheats, when thermal source imports and exports the temperature difference≤3 DEG C to program setting initial value 20% to screw expansion generating set
When, it is considered as preheating and completes, unit enters next step startup program, and after unit is started shooting, thermal source control system is according to the heat of setting
The aperture of source outlet temperature regulation thermal source bypass valve 7, and monitored in real time；
5）After the completion of unit preheating, start tank level control system and control pressurer system, automatic start working medium pump 15, working medium pump 15
By VFC, using positive displacement twin-screw working medium pump, system detects the liquid level of evaporators 2 by evaporator liquid level, 17, when
When liquid level reaches setting value 350mm, working medium pump 15 passes through its rotating speed of Frequency Converter Control；Evaporator pressure sensor 24 detects
When reaching setting value 1.2MPa to the pressure of evaporator 2, electric control valve 25 is bypassed by adjusting, maintains the pressure of evaporator 2,
And start main air intake control system；
6）Main air intake control system starts, and expands owner's air inlet adjustment valve 3 by adjusting screw rod to control turning for screw expander 4
Speed, system detect screw expander rotating speed by the moment of speed probe 20, are controlled according to start-up phase sets requirement, when
After generator 5 is grid-connected, according to setting power, screw expander system charge flow rate is controlled by adjusting main air inlet adjustment valve 3；
7）Screw expander system starts：According to the screw expander start-up phase of setting, screw expander rotating speed is according to working medium
Tolerance size automatically adjusts, and the first stage is warm-up phase：It is 100rpm to control screw expander rotating speed, when screw expander turns
When speed reaches 100rpm, subsidiary engine lubricating system starts rotor lubrication oil pump 8 simultaneously；Second stage is ramp-up stage, screw expansion
Machine automatic raising speed is to 1350rpm；Phase III is the grid-connected stage, and screw expander is by adjusting charge flow rate, by screw expansion
Machine rotating speed maintains 1500rpm；
9）When screw expander electricity generation system rotating speed reaches 1350rpm, automatic start exciter control system, described excitation control
System processed adjusts excitation voltage and exciting current according to detection line voltage and generator voltage, after the completion of grid-connected, excitation control
System processed is constantly in working condition, and excitation voltage and exciting current are adjusted according to the generator power factor of setting；
10）When screw expander electricity generation system rotating speed reaches 1500rpm, automatic start automatic presynchronization system.Pass through detection
The frequency of generator 5 and power network, voltage, phase angle, adjust main air inlet adjustment valve, when the frequency of generator 5 and power network, voltage,
During the load grid-connected conditions of phase angle, described automatic presynchronization system sends grid-connected instruction, completes grid-connected；
11）After the completion of grid-connected, manual switching to protection switching interface, the every protection of artificial input, mainly includes as needed：It is inverse
Power is protected, the protection of the liquid level of fluid reservoir 16, the protection of the oil level of oil eliminator 10, the overspeed protection of generator 5, and the overpower of generator 5 is protected
The switchings such as shield, the overcurrent protection of generator 5, the protection of the low speed of generator 5, the overpressure protection of evaporator 2, the overpressure protection of condenser 12；
12）After start completion, the system of screw expansion generating set can automatic running.When fault detection system detects operation ginseng
When number deviates setting value, system can be automatically adjusted according to pre-set program, if there is the system failure or monitoring
Index exceedes limit value, can be shut down automatically according to startup program reverse-order to protect system, data collecting system is to whole
Screw expansion generating set starts and operation phase whole record related data is so that central control room upper computer is made to said system
Instruction.
Data are uploaded to central control room upper computer by each system of the present invention by way of network transmission, and Central Control Room is upper
Machine is managed concentratedly data, while coordinates the operation of control screw expansion generating set according to data feedback situation, so as to
Realize the full-automatic management of screw expansion generating set.
Claims (4)
1. a kind of screw expansion generating set full-automatic control system, it is characterised in that including central control room upper computer, for spiral shell
The data of bar expansion power generation unit are collected, and preservation is judged and is controlled, and is provided with the central control room upper computer
One-key start button；
Automatic checkout system：The liquid level in fluid reservoir is detected by the liquid tank level meter in fluid reservoir, and transmit to
Central control room upper computer, the oil level in oil water separator is detected and transmitted by the oil eliminator liquid level gauge in oil eliminator
To central control room upper computer, detected by the state of the scram button to cutting-in control cabinet and be sent to central control room upper computer,
Central control room upper computer is analyzed data and fluid reservoir, oil eliminator and scram button is controlled according to the value of setting；
Auxiliary lubricating system：By the pressure fuel pump sensor that rotor lubrication fuel pump outlet is set to rotor lubrication fuel pump outlet pressure
Power is measured and transmitted to central control room upper computer, by the speed probe that is set on screw expander to screw expander
Rotating speed is measured and transmitted to central control room upper computer, central control room upper computer determines lubricating oil according to the rotating speed of screw expander
Whether pump starts；
Cooling water recirculation system：The water level in cooling circulating water pond is measured by the water-level gauge in cooling circulating water pond,
Water temperature is measured by pond thermometer and carries out data transfer to central control room upper computer, central control room upper computer logarithm value
Judge to be controlled cooling circulating water pond, water circulating pump, cooling blower and frequency-variable controller；
Thermal source control system：The heat source import thermometer and thermal source set on pipeline by screw expansion generating set thermal source goes out
The temperature that mouth thermometer is imported and exported to thermal source is measured, and sends data to central control room upper computer, and central control room upper computer is led to
Cross and the thermal source inlet and outlet temperature difference is judged, determine in the unlatching and thermal source outlet pipeline of heat source import pipeline regulating valve by thermal source
The regulation of road regulating valve；
Tank level control system：By the liquid level sensor that is set in evaporator to the level gauging of evaporator, central control room upper computer
The rotating speed of working medium pump is controlled by frequency-variable controller；
Control pressurer system：By pressure measxurement of the evaporating pressure sensor to evaporator and to send data to Central Control Room upper
Machine, central control room upper computer is to the bypass motorized adjustment valve regulation on the evaporator discharge pipeline；
Main air intake control system：System time detects screw expander rotating speed, is controlled according to start-up phase sets requirement, when
After generator connecting in parallel with system, according to setting power, screw expander system charge flow rate is controlled by adjusting main air inlet adjustment valve；
Screw expander system：Screw expander system is connected with central control room upper computer control, and the rotating speed of screw expander is entered
Row monitors and sends corresponding instruction；
Exciter control system：Exciter control system is arranged inside cutting-in control cabinet, and the cutting-in control cabinet panel is provided with anxious
Stop button, the exciter control system includes the detection means of excitation controller, excitation voltage and exciting current, and Central Control Room passes through
Excitation voltage and exciting current are adjusted after being detected to line voltage and generator voltage for the detection means, middle control
Room host computer controls the startup of exciter control system according to the rotating speed of screw expander；
Automatic presynchronization system：Central control room upper computer controls the startup of automatic presynchronization system according to the rotating speed of screw expander,
When the frequency of generator and power network, voltage, phase angle meet grid-connected conditions, automatic presynchronization system sends grid-connected instruction, complete
Into grid-connected；
Protect fling-cut system：After the completion of automatic presynchronization system grid connection, manual switching to protection fling-cut system interface；
Fault detection system：To the startup of whole screw expansion generating set and operation phase complete monitoring, when operational factor deviates
During setting value, system can be automatically adjusted according to pre-set program；
Data collecting system：Whole screw expansion generating set is started and operation phase whole record related data is so as to middle control
Room host computer makes instruction to said system.
2. screw expansion generating set full-automatic control system according to claim 1, it is characterised in that the protection is thrown
Interface is cut to be arranged on cutting-in control cabinet panel.
3. screw expansion generating set full-automatic control system according to claim 1, it is characterised in that each system
After a upper system safe and stable operation, next system is just allowed to start, and strengthens the security for system of knowing clearly.
4. the control method of full-automatic control system described in a kind of claim 1, it is characterised in that comprise the following steps：
1）Open central control room upper computer one-key start button, automatic checkout system according to the detection project of program setting carry out according to
Secondary detection, detection project is liquid tank level >=600mm of liquid tank level meter detection, the oil that oil eliminator liquid level gauge detects
From device oil level >=400mm, the state of the scram button on cutting-in control cabinet panel；
2）Treat step 1）Instruction complete and feed back to central control room upper computer after, automatic start subsidiary engine lubricating system：Screw expansion
The data that machine bearing grease pump detects according to pressure fuel pump sensor are made a response, when fuel pump outlet sets pressure 0.5MPa then
Automatically adjust flow of lubrication；The rotor lubrication oil pump moment detects screw expander system rotation situation, when detecting that screw rod is swollen
When swollen machine rotating speed reaches 100rpm, rotor of screw expander grease pump automatic start；
3）Cooling circulating water system starts：Automatic identification cooling circulating water pool water level, and being automatically replenished, radiator thermometer and
The data that cistern water level meter is detected to the temperature and water level of cooling water circulation pond reclaimed water determine to act in next step, work as cooling
Recirculated water intake≤30 DEG C when, start water circulating pump and cooling blower, when cooling circulating water intake≤30 DEG C when, pass through frequency conversion control
Cooling blower processed, cooling blower electric machine frequency is reduced, reduce system from power consumption；
4）After described cooling circulating water system normally starts, start thermal source control system：Gradually open heat source import regulation
Valve opening is preheated to screw expansion generating set to program setting initial value 20%, when thermal source imports and exports the temperature difference≤3 DEG C,
It is considered as preheating to complete, unit enters next step startup program, and after unit start, thermal source control system goes out according to the thermal source of setting
Mouth temperature adjustment thermal source bypass valve aperture, and monitored in real time；
5）After the completion of unit preheating, start tank level control system and control pressurer system, automatic start working medium pump, working medium pump pass through
VFC, using positive displacement twin-screw working medium pump；
System detects the liquid level of evaporator by evaporator liquid level gauge, and when liquid level reaches setting value 350mm, working medium pump leads to
Cross Frequency Converter Control its rotating speed；When evaporator pressure sensor detects that evaporator pressure reaches setting value 1.2MPa, pass through tune
Section bypass electric control valve, maintains evaporator pressure, and start main air intake control system；
6）Main air intake control system starts, and controls screw expander rotating speed by adjusting screw rod expanding machine air inlet adjustment valve, is
System detects screw expander rotating speed by the speed probe moment, is controlled according to start-up phase sets requirement, works as generator
After grid-connected, according to setting power, screw expander system charge flow rate is controlled by adjusting main air inlet adjustment valve；
7）Screw expander system starts：According to the screw expander start-up phase of setting, screw expander rotating speed is according to working medium
Tolerance size automatically adjusts, and the first stage is warm-up phase：It is 100rpm to control screw expander rotating speed, when screw expander turns
When speed reaches 100rpm, subsidiary engine lubricating system starts rotor lubrication oil pump simultaneously；Second stage is ramp-up stage, screw expander
Automatic raising speed is to 1350rpm；Phase III is the grid-connected stage, and screw expander is by adjusting charge flow rate, by screw expander
Rotating speed maintains 1500rpm；
9）When screw expander electricity generation system rotating speed reaches 1350rpm, automatic start exciter control system, described excitation control
System processed adjusts excitation voltage and exciting current according to detection line voltage and generator voltage, after the completion of grid-connected, excitation control
System processed is constantly in working condition, and excitation voltage and exciting current are adjusted according to the generator power factor of setting；
10）When screw expander electricity generation system rotating speed reaches 1500rpm, automatic start automatic presynchronization system；
By detecting the frequency of generator and power network, voltage, phase angle, main air inlet adjustment valve is adjusted, when generator and power network
When frequency, voltage, phase angle load grid-connected conditions, described automatic presynchronization system sends grid-connected instruction, completes grid-connected；
11）After the completion of grid-connected, manual switching to protection switching interface, the every protection of artificial input, mainly includes as needed：It is inverse
Power is protected, and liquid tank level protection, the protection of oil eliminator oil level, generator overspeed protection, the protection of generator overpower, is generated electricity
The switchings such as machine overcurrent protection, the protection of generator low speed, evaporator overpressure protection, condenser overpressure protection；
12）After start completion, the system of screw expansion generating set can automatic running；
When fault detection system detects that operational factor deviates setting value, system can be carried out certainly according to pre-set program
Dynamic adjustment, exceedes limit value if there is the system failure or monitor control index, can be shut down automatically according to startup program reverse-order
To protect system, data collecting system whole screw expansion generating set is started and operation phase whole record related data with
Just central control room upper computer makes instruction to said system.
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