CN106437912A - Natural gas differential pressure power generation system and control method thereof - Google Patents
Natural gas differential pressure power generation system and control method thereof Download PDFInfo
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- CN106437912A CN106437912A CN201610978363.1A CN201610978363A CN106437912A CN 106437912 A CN106437912 A CN 106437912A CN 201610978363 A CN201610978363 A CN 201610978363A CN 106437912 A CN106437912 A CN 106437912A
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- control cabinet
- plc control
- natural gas
- excitation
- explosion
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Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01K—STEAM ENGINE PLANTS; STEAM ACCUMULATORS; ENGINE PLANTS NOT OTHERWISE PROVIDED FOR; ENGINES USING SPECIAL WORKING FLUIDS OR CYCLES
- F01K27/00—Plants for converting heat or fluid energy into mechanical energy, not otherwise provided for
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01K—STEAM ENGINE PLANTS; STEAM ACCUMULATORS; ENGINE PLANTS NOT OTHERWISE PROVIDED FOR; ENGINES USING SPECIAL WORKING FLUIDS OR CYCLES
- F01K25/00—Plants or engines characterised by use of special working fluids, not otherwise provided for; Plants operating in closed cycles and not otherwise provided for
- F01K25/08—Plants or engines characterised by use of special working fluids, not otherwise provided for; Plants operating in closed cycles and not otherwise provided for using special vapours
Abstract
The invention discloses a natural gas differential pressure power generation system and a control method of the natural gas differential pressure power generation system. The power generation system comprises an electromagnetic valve, an electric adjusting valve, a fluid motor, an excitation explosion-proof generator, a PLC control cabinet, a voltage and frequency stabilizing device, an inverter, a storage battery pack and a UPS power source. The electromagnetic valve, the electric adjusting valve and the fluid motor are installed on a power generation pipeline. The excitation explosion-proof generator is connected with the fluid motor. The PLC control cabinet is connected with the electromagnetic valve, the electric adjusting valve, an excitation module of the excitation explosion-proof generator and the UPS power source. The excitation explosion-proof generator is connected with a voltage and current detection module in the PLC control cabinet and then connected with the input end of the voltage and frequency stabilizing device. The voltage and frequency stabilizing device is connected with the PLC control cabinet and the input end of the inverter respectively. The inverter is connected with the storage battery pack. The storage battery pack is connected with the UPS power source. The UPS power source is connected with the PLC control cabinet. The natural gas differential pressure power generation system has the advantages of being simple in structure, safe, stable, good in electricity quality and high in automation degree. The control method has the advantages of being reasonable in logic, high in controllability and high in safety.
Description
Technical field
The present invention relates to a kind of generating equipment, especially relate to a kind of for generated electricity using natural gas pressure difference be
System, and to method that the system is controlled.
Background technology
Natural gas is requisite important energy source in people's life, and its conveying is needed through the pick-up from high pressure to low pressure
Process just can be used by people.At present, in gas distributing system main by pressure regulation station is set in case carry out from high pressure to
The conversion of low pressure, and can there is substantial amounts of pressure energy of natural gas during pressure regulation, if being unable to effectively utilizes can cause resource
Waste.In recent years, it is that those skilled in the art research and develop using the pressure energy for producing during natural gas pressure regulating
The Chinese invention patent application of the project for being generated electricity using pressure energy of natural gas, such as Publication No. CN104213939A, which is public
A kind of natural gas pipe network pressure energy has been opened and TRT has been reclaimed, and passes through electromagnetic valve, pressure transmitter, leakage to be combined using PLC
Detector and sealer sled, it is achieved that the running status of automatic monitoring TRT, but its fluctuation of service, power quality cannot
Ensure, and its scale is less cannot meet big-and-middle-sized electricity consumption needs.In addition, its gas outlet pressure transient, have impact on
Normally used with gas end.And for example the Chinese invention patent application of Publication No. CN204851334U, it discloses a kind of intelligence
Change natural gas pipe network pressure energy TRT, which is equally a kind of natural gas power generation device of small power generation scale, not only generates electricity
Power is less, and cannot meet the electricity consumption needs of equipment after ensureing to shut down.As can be seen here, existing utilization pressure energy of natural gas
Also there are many defects of storage in the device of generating, be mainly manifested in that generating scale is less, fluctuation of service, power quality be not high, continue
Property is powered the aspect such as poor, needs to be improved further or perfect.
Content of the invention
It is an object of the invention to provide a kind of natural gas pressure difference generating system and its control method, the natural gas pressure difference is sent out
Electric system has the advantages that simple structure, safety and stability, power quality be good, high degree of automation, can meet big-and-middle-sized electricity consumption rule
The daily electricity consumption at mould field station needs, and can be natural gas line 24V electricity consumption instrument uninterrupted power supply, it is ensured which normally runs；Institute
State control method and have the characteristics that logic is reasonable, controllability is strong, safe.
For solve that natural gas power generation device in prior art is present generating scale is less, fluctuation of service, power quality
The not high, problem of continued power ability, a kind of natural gas pressure difference generating system that the present invention is provided, including electromagnetic valve, electronic
Regulating valve, fluid motor, excitation explosion-proof power generator, PLC control cabinet, voltage stabilization and frequency stabilization device, inverter, accumulator battery and UPS electricity
Source, wherein, the electromagnetic valve, electric control valve and fluid motor are sequentially arranged on generating pipeline by upstream to downstream, described
Excitation explosion-proof power generator is connected with fluid motor by shaft coupling, is provided with measure voltage ＆amp in the PLC control cabinet,
PLC control cabinet is respectively by holding wire and electromagnetic valve, electric control valve, the excitation module of excitation explosion-proof power generator and ups power
Connection, the generating output of excitation explosion-proof power generator is after electric lines of force is connected with the measure voltage ＆amp in PLC control cabinet
Be connected with the input of voltage stabilization and frequency stabilization device again, the outfan of voltage stabilization and frequency stabilization device respectively by electric lines of force and PLC control cabinet and
The input connection of inverter, the outfan of inverter is connected with the input of accumulator battery by electric lines of force, accumulator battery
Outfan is connected with the input of ups power, and the outfan of ups power is connected with PLC control cabinet；When installing and using, generating is made
Pipeline is in parallel with natural gas station pressure regulation pipeline, and makes upstream end connect high pressure pipe network, makes downstream connect low-pressure pipe network；Allow field
380/220V electrical equipment of standing is connected with the outfan of voltage stabilization and frequency stabilization device and the outfan of ups power by electric lines of force respectively,
Natural gas line 24V electricity consumption instrument is allowed to be connected with the outfan of accumulator battery by electric lines of force.
Further, a kind of natural gas pressure difference generating system of the present invention, also includes the vacuum tank being arranged on generating pipeline,
Downstream position of the vacuum tank in fluid motor is made, and the volumetric quantities of vacuum tank is made more than or equal to its entrance caliber numerical value
75 times.
Further, a kind of natural gas pressure difference generating system of the present invention, also includes the first pressure being arranged on generating pipeline
Power transmitter, the first temperature transmitter, second pressure transmitter and second temperature transmitter, and make first pressure transmitter,
One temperature transmitter, second pressure transmitter and second temperature transmitter are connected with PLC control cabinet by holding wire respectively, its
In, first pressure transmitter and the first temperature transmitter are in the position between electric control valve and fluid motor, second pressure
The downstream position of transmitter and second temperature transmitter in vacuum tank.
Further, a kind of natural gas pressure difference generating system of the present invention, wherein, the fluid motor and the explosion-proof generating of excitation
Shaft coupling between machine is provided with speed instrument, and fluid motor and excitation explosion-proof power generator using same skid and are installed on and set
In standby case, equipment box is arranged at station anti-explosion area, and equipment box top is provided with concentration of natural gas detector, the speed instrument and
Concentration of natural gas detector is connected with PLC control cabinet by holding wire respectively.
Further, a kind of natural gas pressure difference generating system of the present invention, also includes to be arranged at and diffuses ball on generating pipeline
Valve and stop valve, wherein, described diffuse the downstream position that ball valve is arranged at second pressure transmitter and second temperature transmitter, institute
State stop valve and be arranged at the downstream position for diffusing ball valve.
Further, a kind of natural gas pressure difference generating system of the present invention, wherein, the electric control valve is adjusted for anti-explosion electric
Section valve, the degree of regulation of electric control valve is 0.1～1%；The excitation explosion-proof power generator is electromagnetic field class electromotor.
A kind of control method of natural gas pressure difference generating system disclosed by the invention, comprises the following steps：
First, ups power is opened, allows ups power respectively alternating current is conveyed to PLC control cabinet and station 380/220V electricity consumption
Equipment, now, ups power is in power supply state；
2nd, open the on and off switch of PLC control cabinet, check electromagnetic valve, electric control valve, excitation explosion-proof power generator, first
Pressure transmitter, the first temperature transmitter, second pressure transmitter, second temperature transmitter, speed instrument and natural gas are dense
Whether the state of degree detector is normal；
If each valve and meter status are normal, boot up after PLC control cabinet sets the rotating speed of fluid motor；If
Each valve and meter status are abnormal, then, after carrying out hand inspection and fixing a breakdown, set fluid motor by PLC control cabinet
Rotating speed is simultaneously booted up；
2nd, after starting shooting, allow PLC control cabinet to open electromagnetic valve automatically, and allow the aperture of electric control valve to be gradually increased, gas
Stream drives fluid motor to rotate and drives excitation explosion-proof power generator to operate；
3rd, when fluid motor rotating speed reaches setting speed stable operation 3S, make PLC control cabinet automatically explosion-proof to excitation
The excitation module note magnetic of electromotor, excitation explosion-proof power generator generates electricity and electric power is fed sequentially into the electricity of the voltage in PLC control cabinet
Stream detection module and voltage stabilization and frequency stabilization device；
4th, power transmission is set by voltage stabilization and frequency stabilization device respectively to PLC control cabinet, inverter and station 380/220V electricity consumption
Standby；Meanwhile, PLC control cabinet makes ups power switch to charged state automatically, to stop to PLC control cabinet and station 380/220V
Electrical equipment is powered；
5th, inverter is converted to alternating current after unidirectional current and is conveyed to accumulator battery, and accumulator battery carries out electric power storage and is UPS
Power source charges, meanwhile, unidirectional current is conveyed to natural gas line 24V electricity consumption instrument by accumulator battery；
6th, during above-mentioned steps two to five, PLC control cabinet is allowed to become by first pressure transmitter, the first temperature
Device, second pressure transmitter, second temperature transmitter, speed instrument and concentration of natural gas detector is sent to monitor automatically generating system
The operation conditions of system, and reported to the police automatically or/and shut down according to unusual condition, specifically realize by the following method：
A, when the pressure value that first pressure transmitter and second pressure transmitters monitor are arrived exceedes setting value, carry out automatically
Report to the police, and shut down；
B, when the temperature value that the first temperature transmitter and second temperature transmitters monitor are arrived is less than setting value, carry out automatically
Report to the police, but do not shut down；
C, when the concentration of natural gas value that natural gas concentration detector is monitored exceed setting value when, carry out automatic alarm, and
Shut down；
D, when the tachometer value that speed instrument is monitored exceed setting value when, carry out automatic alarm, and shut down；
E, when there is fluctuation but is not above setting value in tachometer value that speed instrument is monitored, allow PLC control cabinet from
The dynamic aperture for adjusting electric control valve is so that rotating speed recovers stable；
7th, artificial orderly closedown or according to step 6 detection unusual condition emergency shutdown when, by PLC control cabinet from
Dynamic cut-out electromagnetic valve, makes the aperture of electric control valve be gradually decrease to zero, makes the excitation module demagnetization of excitation explosion-proof power generator, and
By the artificial on and off switch for closing PLC control cabinet to complete stopping process；Meanwhile, PLC control cabinet switches ups power automatically
For power supply state, to power for station 380/220V electrical equipment；
8th, when ups power is in power supply state, allows PLC control cabinet that the electricity of ups power is monitored automatically, and work as electricity
Close ups power during less than 30%, to stop power supply.
A kind of natural gas pressure difference generating system of the present invention and its control method compared with prior art, with advantages below：
(1) present invention is by arranging electromagnetic valve, electric control valve, fluid motor, excitation explosion-proof power generator, PLC control cabinet, voltage stabilization and frequency stabilization
Device, inverter, accumulator battery and ups power, allow electromagnetic valve, electric control valve and fluid motor to be pacified to downstream successively by upstream
It is mounted on generating pipeline, allows excitation explosion-proof power generator to be connected with fluid motor by shaft coupling, voltage is set in PLC control cabinet
Current detection module, allows PLC control cabinet respectively by holding wire and electromagnetic valve, electric control valve, the encouraging of excitation explosion-proof power generator
Magnetic module and ups power connection, allow excitation explosion-proof power generator generating output by the voltage electricity in electric lines of force and PLC control cabinet
It is connected with the input of voltage stabilization and frequency stabilization device after stream detection module connection again, allows the outfan of voltage stabilization and frequency stabilization device pass through electricity respectively
The line of force is connected with the input of PLC control cabinet and inverter, makes the outfan of inverter defeated with accumulator battery by electric lines of force
Enter end connection, allow the outfan of accumulator battery to be connected with the input of ups power, allow the outfan of ups power and PLC control cabinet
Connection.Thus just constitute that a kind of simple structure, safety and stability, power quality be good, high degree of automation natural gas pressure difference is sent out
Electric system.When installing and using, make generating pipeline in parallel with original pressure regulation pipeline of natural gas station, and it is high to connect upstream end
Pressure pipe net, makes downstream connect low-pressure pipe network.Meanwhile, make station 380/220V electrical equipment steady with voltage stabilizing by electric lines of force respectively
The outfan connection of the outfan of frequency device and ups power, allows natural gas line 24V electricity consumption instrument by electric lines of force and accumulator
The outfan connection of group.The present invention passes through the structure using fluid motor connecting shaft excitation explosion-proof power generator, can meet big-and-middle-sized use
The daily electricity consumption of electric scale station；By excitation explosion-proof power generator is adopted, can achieve to increase automatically magnetic, subtract magnetic, not only make control more
Plus easily realize, and make generating quality more stable, it is ensured that the safety of electrical equipment；By adopting 380V/220V and 24V
Two kinds of different supply lines are classified power supply to station electrical equipment and instrument, it is achieved that instrument 24h uninterrupted power supply,
Electrical equipment long-time is powered.(2) a kind of control method of natural gas pressure difference generating system that the present invention is provided has logic conjunction
Strong, the safe feature of reason, controllability.
Shown specific embodiment is to a kind of natural gas pressure difference generating system of the present invention and its controlling party below in conjunction with the accompanying drawings
Method is described in further detail：
Description of the drawings
Fig. 1 is a kind of structural representation of natural gas pressure difference generating system of the present invention；
Fig. 2 is a kind of control flow chart of natural gas pressure difference generating system of the present invention；
In figure, 1, electromagnetic valve；2nd, electric control valve；3rd, fluid motor；4th, excitation explosion-proof power generator；5th, PLC control cabinet；6、
Voltage stabilization and frequency stabilization device；7th, inverter；8th, accumulator battery；9th, ups power；10th, vacuum tank；11st, first pressure transmitter；12nd,
One temperature transmitter；13rd, second pressure transmitter；14th, second temperature transmitter；15th, speed instrument；16th, concentration of natural gas
Detector；17th, ball valve is diffused；18 stop valves；19th, 24V electricity consumption instrument；20th, 380/220V electrical equipment；21st, station surge pipe
Intelligent voltage regulator in road；22 and 23, the pressure regulation stop valve in station pressure regulation pipeline；24th, high pressure pipe network；25th, low-pressure pipe network.
Specific embodiment
Firstly the need of explanation, this invention provides both a kind of natural gas pressure difference generating system, this for providing again is natural
The control method of draught head electricity generation system.
A kind of as shown in Figure 1 specific embodiment of natural gas pressure difference generating system of the present invention, including electromagnetic valve 1, electronic
Regulating valve 2, fluid motor 3, excitation explosion-proof power generator 4, PLC control cabinet 5, voltage stabilization and frequency stabilization device 6, inverter 7, accumulator battery 8
With ups power 9.Electromagnetic valve 1, electric control valve 2 and fluid motor 3 is allowed to be sequentially arranged on generating pipeline by upstream to downstream,
Allow excitation explosion-proof power generator 4 to be connected with fluid motor 3 by shaft coupling, measure voltage ＆ current mould is set in PLC control cabinet 5
Block, allow PLC control cabinet 5 respectively by holding wire and electromagnetic valve 1, electric control valve 2, excitation explosion-proof power generator 4 excitation module
Connect with ups power 9, allow excitation explosion-proof power generator 4 generating output by the voltage x current in electric lines of force and PLC control cabinet 5
It is connected with the input of voltage stabilization and frequency stabilization device 6 after detection module connection again, allows the outfan of voltage stabilization and frequency stabilization device 6 pass through electricity respectively
The line of force is connected with the input of PLC control cabinet 5 and inverter 7, allows the outfan of inverter 7 pass through electric lines of force and accumulator battery 8
Input connection, allow the outfan of accumulator battery 8 be connected with the input of ups power 9, allow ups power 9 outfan and
PLC control cabinet 5 connects.A kind of simple structure, safety and stability, power quality are just constituted by above structure setting good, automatic
The high natural gas pressure difference generating system of change degree.When installing and using, original surge pipe of generating pipeline and natural gas station is allowed
Road parallel connection, and make upstream end connect high pressure pipe network, make downstream connect low-pressure pipe network.Meanwhile, allow station 380/220V electricity consumption to set
Back-up not Tong Guo electric lines of force be connected with the outfan of voltage stabilization and frequency stabilization device 6 and the outfan of ups power 9, allow natural gas line 24V
Electricity consumption instrument is connected with the outfan of accumulator battery 8 by electric lines of force.The present invention is by explosion-proof using 3 connecting shaft excitation of fluid motor
The structure of electromotor 4, can meet the daily electricity consumption of big-and-middle-sized electricity consumption scale station；By can achieve using excitation explosion-proof power generator
Automatically increase magnetic, subtract magnetic, not only make control be more prone to realize, and make generating quality more stable, it is ensured that electrical equipment
Safety；By being classified supplying to station electrical equipment and instrument using two kinds of different supply lines of 380V/220V and 24V
Electricity, it is achieved that instrument 24h uninterrupted power supply, 380V/220V electrical equipment long-time is powered.The present invention is opened using PLC control cabinet 5
Shutdown instead of check-valves and relief valve, and safety is higher, is conducive to industrialization.
Used as prioritization scheme, this specific embodiment is provided with vacuum tank 10 on generating pipeline, is in vacuum tank 10
The downstream position of fluid motor 3, and make 75 times of the volumetric quantities of vacuum tank 10 more than or equal to its entrance caliber numerical value.Pass through
Vacuum tank 10 is set, effective cushioning effect can be played in the case that fluctuation occurs in air-flow, on the one hand avoid electricity generation system
Downstream air pressure is affected greatly, on the other hand can make to enhance the stability that electricity sends out system operation.
Meanwhile, for convenience of the operation conditions of real-time monitoring electricity generation system, improve automated management degree, this specific embodiment party
Formula is provided with first pressure transmitter 11, the first temperature transmitter 12, second pressure transmitter 13 and second on generating pipeline
Temperature transmitter 14, and make first pressure transmitter 11, the first temperature transmitter 12, second pressure transmitter 13 and second temperature
Transmitter 14 is connected with PLC control cabinet 5 by holding wire respectively, wherein, allows first pressure transmitter 11 and the first temperature pick-up
Device 12 is in position between electric control valve 2 and fluid motor 3, allows second pressure transmitter 13 and second temperature transmitter 14
Downstream position in vacuum tank 10.The present invention can be examined in real time by arranging 11 first temperature transmitter 12 of first pressure transmitter
The pressure and temperature of 3 upstream of fluid measured motor, can be real-time by arranging second pressure transmitter 13 and second temperature transmitter 14
The pressure and temperature in detection 10 downstream of vacuum tank, and the pressure and temperature parameter of detection is passed to PLC control cabinet 5, so as to PLC
Switch board 5 is reported to the police in pressure and temperature exception automatically or/and is shut down, and can not only ensure the safety of system, and improve
Automated management degree.
In addition, be provided with shaft coupling of this specific embodiment between fluid motor 3 and excitation explosion-proof power generator 4 turning
Fast tachymeter 15, and make fluid motor 3 and excitation explosion-proof power generator 4 using same skid and be installed in equipment box, allows equipment
Case is arranged at station anti-explosion area, allows equipment box arrange concentration of natural gas detector 16 at top, and makes speed instrument 15 and day
So gas concentration detector 16 is connected with PLC control cabinet 5 by holding wire respectively.By above structure setting, PLC control cabinet can be made
5 by the rotating speed of 15 real-time monitoring fluid motor 3 of speed instrument, and can real-time monitoring day by concentration of natural gas detector 16
So whether gas is revealed, and to be reported to the police in rotating speed and concentration of natural gas exception automatically or/and to be shut down, further increases and is
The safety of system, practicality is higher.
It should be noted that in actual applications, invention is also provided with generating pipeline and diffuses ball valve 17 and stop valve
18, allow the downstream position for diffusing that ball valve 17 is arranged at second pressure transmitter 13 and second temperature transmitter 14, allow stop valve 18
It is arranged at the downstream position for diffusing ball valve 17.When the hypertonia in generating pipeline, can be carried out in time by diffusing ball valve 17
Pressure release, to ensure safety；When electricity generation system breaks down shutdown, the company with downstream pipe network can be cut off by closing stop valve 18
Connect, checked with facilitating or keep in repair, and the safety of protection equipment.For improving safety, the motorized adjustment in the present invention further
Valve 2 generally adopts anti-explosion electric regulating valve, and makes its degree of regulation for 0.1～1%；Excitation explosion-proof power generator 4 is generally using electricity
Magnetic field class electromotor.
Flow chart as shown in Figure 2, a kind of control method of natural gas pressure difference generating system that the present invention is provided, concrete bag
Include following steps：
First, ups power 9 is opened, allows ups power 9 respectively alternating current is conveyed to PLC control cabinet 5 and station 380/220V
Electrical equipment, now, ups power 9 is in power supply state；
2nd, the on and off switch of PLC control cabinet 5 is opened, and checks electromagnetic valve 1, electric control valve 2, excitation explosion-proof power generator
4th, first pressure transmitter 11, the first temperature transmitter 12, second pressure transmitter 13, second temperature transmitter 14, rotating speed are surveyed
Whether the state of fast instrument 15 and concentration of natural gas detector 16 is normal；
If each valve and meter status are normal, boot up after PLC control cabinet 5 sets the rotating speed of fluid motor 3；
If each valve and meter status are abnormal, after carrying out hand inspection and fixing a breakdown, fluid horse is set by PLC control cabinet 5
Reach 3 rotating speed and boot up；
2nd, after starting shooting, allow PLC control cabinet 5 to open electromagnetic valve 1 automatically, and allow the aperture of electric control valve 2 gradually to increase
Greatly, air stream drives fluid motor 3 rotates and drives excitation explosion-proof power generator 4 to operate；
3rd, when 3 rotating speed of fluid motor reaches setting speed stable operation 3S, make PLC control cabinet 5 automatically anti-to excitation
The excitation module note magnetic of outburst motor 4, excitation explosion-proof power generator 4 generates electricity and electric power is fed sequentially into the electricity in PLC control cabinet 5
Current voltage detection module and voltage stabilization and frequency stabilization device 6；
4th, voltage stabilization and frequency stabilization device 6 is respectively by power transmission to PLC control cabinet 5, inverter 7 and station 380/220V electricity consumption
Equipment；Meanwhile, PLC control cabinet 5 makes ups power 9 switch to charged state automatically, to stop to PLC control cabinet 5 and station 380/
220V electrical equipment is powered；
5th, inverter 7 is converted to alternating current after unidirectional current and is conveyed to accumulator battery 8, and accumulator battery 8 carries out electric power storage and is
Ups power 9 charges, meanwhile, unidirectional current is conveyed to natural gas line 24V electricity consumption instrument by accumulator battery 8；
6th, during above-mentioned steps two to five, PLC control cabinet 5 is allowed by first pressure transmitter 11, the first temperature
Transmitter 12, second pressure transmitter 13, second temperature transmitter 14, speed instrument 15 and concentration of natural gas detector 16 are certainly
The operation conditions of dynamic monitoring electricity generation system, and reported to the police automatically or/and shut down according to unusual condition, specifically real by the following method
Existing：
A, when the pressure value that first pressure transmitter 11 and second pressure transmitter 13 are monitored exceed setting value when, carry out
Automatic alarm, and shut down；
B, when the temperature value that the first temperature transmitter 12 and second temperature transmitter 14 are monitored less than setting value when, carry out
Automatic alarm, but do not shut down；
C, when the concentration of natural gas value that natural gas concentration detector 16 is monitored exceed setting value when, carry out automatic alarm,
And shut down；
D, when the tachometer value that speed instrument 15 is monitored exceed setting value when, carry out automatic alarm, and shut down；
E, when there is fluctuation but is not above setting value in tachometer value that speed instrument 15 is monitored, allow PLC control cabinet 5
The aperture of electric control valve 2 is automatically adjusted so that rotating speed recovers stable；
7th, artificial orderly closedown or according to step 6 detection unusual condition emergency shutdown when, by PLC control cabinet 5
Electromagnetic valve 1 is automatically cut off, makes the aperture of electric control valve 2 that zero is gradually decrease to, so that the excitation module of excitation explosion-proof power generator 4 is disappeared
Magnetic, and by the artificial on and off switch for closing PLC control cabinet 5 to complete stopping process；Meanwhile, PLC control cabinet 5 makes UPS automatically
Power supply 9 switches to power supply state, to power for station 380/220V electrical equipment；
8th, when ups power 9 is in power supply state, PLC control cabinet 5 is allowed to monitor automatically the electricity of ups power 9, and when electricity
Close ups power 9 when amount is less than 30%, to stop power supply.
A kind of control method of natural gas pressure difference generating system of the present invention has that logic is reasonable, controllability is strong, safe
Feature, realizing generating electricity power supply and ups power is powered the seamless switching of two kinds of powering modes, and can be directed to unusual condition forms report
Alert list, it is ensured that the safety of electricity generation system.
Above example is only the description carried out by the preferred embodiment for the present invention, not scope is claimed to the present invention
The restriction for carrying out, on the premise of without departing from design spirit of the present invention, this area engineers and technicians are according to the technology of the present invention
The various forms of deformation that scheme is made, all should fall in the protection domain of claims of the present invention determination.
Claims (7)
1. a kind of natural gas pressure difference generating system, explosion-proof including electromagnetic valve (1), electric control valve (2), fluid motor (3), excitation
Electromotor (4), PLC control cabinet (5), voltage stabilization and frequency stabilization device (6), inverter (7), accumulator battery (8) and ups power (9), which is special
Levy and be, electromagnetic valve (1), electric control valve (2) and fluid motor (3) are sequentially arranged at generating pipeline by upstream to downstream
On, described excitation explosion-proof power generator (4) are connected with fluid motor (3) by shaft coupling, are provided with electricity in PLC control cabinet (5)
Current voltage detection module, PLC control cabinet (5) is respectively by holding wire and electromagnetic valve (1), electric control valve (2), the anti-outburst of excitation
The excitation module of motor (4) and ups power (9) connection, the generating of excitation explosion-proof power generator (4) is exported by electric lines of force and PLC
It is connected with the input of voltage stabilization and frequency stabilization device (6) after measure voltage ＆amp connection in switch board (5) again, voltage stabilization and frequency stabilization is filled
The outfan for putting (6) is connected with the input of PLC control cabinet (5) and inverter (7) by electric lines of force respectively, inverter (7)
Outfan is connected with the input of accumulator battery (8) by electric lines of force, and the outfan of accumulator battery (8) is defeated with ups power (9)
Enter end connection, the outfan of ups power (9) is connected with PLC control cabinet (5)；When installing and using, generating pipeline is made with natural gas field
Pressure regulation pipeline of standing is in parallel, and makes upstream end connect high pressure pipe network, makes downstream connect low-pressure pipe network；Allow station 380/220V electricity consumption
Equipment is connected with the outfan of voltage stabilization and frequency stabilization device (6) and the outfan of ups power (9) by electric lines of force respectively, allows natural gas
Pipeline 24V electricity consumption instrument is connected with the outfan of accumulator battery (8) by electric lines of force.
2. according to a kind of natural gas pressure difference generating system described in claim 1, it is characterised in that also include to be arranged at generating pipe
Vacuum tank (10) on road, makes downstream position of the vacuum tank (10) in fluid motor (3), and makes the volume number of vacuum tank (10)
75 times for being worth more than or equal to its entrance caliber numerical value.
3. according to a kind of natural gas pressure difference generating system described in claim 2, it is characterised in that also include to be arranged at generating pipe
First pressure transmitter (11), the first temperature transmitter (12), second pressure transmitter (13) and second temperature pick-up on road
Device (14), and make first pressure transmitter (11), the first temperature transmitter (12), second pressure transmitter (13) and second temperature
Transmitter (14) is connected, wherein, first pressure transmitter (11) and the first temperature by holding wire respectively with PLC control cabinet (5)
Transmitter (12) is in the position between electric control valve (2) and fluid motor (3), second pressure transmitter (13) and the second temperature
Downstream position of degree transmitter (14) in vacuum tank (10).
4. according to a kind of natural gas pressure difference generating system described in claim 3, it is characterised in that fluid motor (3) and
Shaft coupling between excitation explosion-proof power generator (4) is provided with speed instrument (15), fluid motor (3) and excitation explosion-proof power generator
(4) using same skid and it is installed in equipment box, equipment box is arranged at station anti-explosion area, and it is dense that equipment box top is provided with natural gas
Degree detector (16), speed instrument (15) and concentration of natural gas detector (16) are respectively by holding wire and PLC control
Cabinet (5) connects.
5. according to a kind of natural gas pressure difference generating system described in claim 4, it is characterised in that also include to be arranged at generating pipe
Ball valve (17) and stop valve (18) are diffused on road, wherein, the ball valve (17) that diffuses is arranged at second pressure transmitter (13)
With the downstream position of second temperature transmitter (14), stop valve (18) are arranged at the downstream position for diffusing ball valve (17).
6. according to a kind of natural gas pressure difference generating system described in claim 5, it is characterised in that electric control valve (2)
For anti-explosion electric regulating valve, the degree of regulation of electric control valve (2) is 0.1～1%；Described excitation explosion-proof power generator (4) are electricity
Magnetic field class electromotor.
7. the control method of natural gas pressure difference generating system described in a kind of claim 6, it is characterised in that comprise the following steps：
First, ups power (9) is opened, allows ups power (9) respectively alternating current is conveyed to PLC control cabinet (5) and station 380/
220V electrical equipment, now, ups power (9) is in power supply state；
2nd, the on and off switch of PLC control cabinet (5) is opened, checks electromagnetic valve (1), electric control valve (2), excitation explosion-proof power generator
(4), first pressure transmitter (11), the first temperature transmitter (12), second pressure transmitter (13), second temperature transmitter
(14), whether the state of speed instrument (15) and concentration of natural gas detector (16) is normal；
If each valve and meter status are normal, boot up after PLC control cabinet (5) sets the rotating speed of fluid motor (3)；
If each valve and meter status are abnormal, after carrying out hand inspection and fixing a breakdown, fluid is set by PLC control cabinet (5)
The rotating speed of motor (3) is simultaneously booted up；
2nd, after starting shooting, allow PLC control cabinet (5) to open electromagnetic valve (1) automatically, and allow the aperture of electric control valve (2) gradually to increase
Greatly, air stream drives fluid motor (3) rotates and drives excitation explosion-proof power generator (4) to operate；
3rd, when fluid motor (3) rotating speed reaches setting speed stable operation 3S, make PLC control cabinet (5) automatically anti-to excitation
The excitation module note magnetic of outburst motor (4), excitation explosion-proof power generator (4) generates electricity and electric power is fed sequentially into PLC control cabinet (5)
In measure voltage ＆amp and voltage stabilization and frequency stabilization device (6)；
4th, power transmission is used by voltage stabilization and frequency stabilization device (6) respectively to PLC control cabinet (5), inverter (7) and station 380/220V
Electric equipment；Meanwhile, PLC control cabinet (5) makes ups power (9) switch to charged state automatically, stopping to PLC control cabinet (5) and
Station 380/220V electrical equipment is powered；
5th, inverter (7) is converted to alternating current after unidirectional current and is conveyed to accumulator battery (8), and accumulator battery (8) carries out electric power storage simultaneously
Charge for ups power (9), meanwhile, unidirectional current is conveyed to natural gas line 24V electricity consumption instrument by accumulator battery (8)；
6th, during above-mentioned steps two to five, PLC control cabinet (5) is allowed by first pressure transmitter (11), the first temperature
Transmitter (12), second pressure transmitter (13), second temperature transmitter (14), speed instrument (15) and concentration of natural gas inspection
The operation conditions that electricity generation system monitored automatically by instrument (16) is surveyed, and is reported to the police automatically or/and shut down according to unusual condition, specifically press
Following methods are realized：
A, when the pressure value that first pressure transmitter (11) and second pressure transmitter (13) are monitored exceed setting value when, carry out
Automatic alarm, and shut down；
B, when the temperature value that the first temperature transmitter (12) and second temperature transmitter (14) are monitored less than setting value when, carry out
Automatic alarm, but do not shut down；
C, when the concentration of natural gas value that natural gas concentration detector (16) is monitored exceed setting value when, carry out automatic alarm, and
Shut down；
D, when the tachometer value that speed instrument (15) is monitored exceed setting value when, carry out automatic alarm, and shut down；
E, when there is fluctuation but is not above setting value in tachometer value that speed instrument (15) is monitored, allow PLC control cabinet (5)
The aperture of electric control valve (2) is automatically adjusted so that rotating speed recovers stable；
7th, artificial orderly closedown or according to step 6 detection unusual condition emergency shutdown when, by PLC control cabinet (5) from
Dynamic cut-out electromagnetic valve (1), makes the aperture of electric control valve (2) be gradually decrease to zero, makes the excitation mould of excitation explosion-proof power generator (4)
Block demagnetization, and by the artificial on and off switch for closing PLC control cabinet (5) to complete stopping process；Meanwhile, PLC control cabinet (5) is certainly
Moving makes ups power (9) switch to power supply state, to power for station 380/220V electrical equipment；
8th, when ups power (9) is in power supply state, allows PLC control cabinet (5) that the electricity of ups power (9) is monitored automatically, and work as
Close ups power (9) when electricity is less than 30%, to stop power supply.
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| CN107271765A (en) * | 2017-07-25 | 2017-10-20 | 广州华丰能源科技有限公司 | A kind of device and method of gas distributing system intelligent power generation metering |
| CN107906367A (en) * | 2017-11-27 | 2018-04-13 | 北京市燃气集团有限责任公司 | A kind of mini gas pipe network pressure regulation power generator |
| CN109779693A (en) * | 2017-11-10 | 2019-05-21 | 广州鲜之源生态冷链技术有限公司 | A kind of method and its equipment to generate electricity using liquid gas |
| CN115562029A (en) * | 2022-10-17 | 2023-01-03 | 杭州天然气有限公司 | Intelligent control method and system for natural gas turbine expansion generator set |
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| CN106437912B (en) | 2018-09-11 |
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