CN104649478A - Wind power isolated grid sea water desalination system - Google Patents
Wind power isolated grid sea water desalination system Download PDFInfo
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- CN104649478A CN104649478A CN201310589321.5A CN201310589321A CN104649478A CN 104649478 A CN104649478 A CN 104649478A CN 201310589321 A CN201310589321 A CN 201310589321A CN 104649478 A CN104649478 A CN 104649478A
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- Y02A20/00—Water conservation; Efficient water supply; Efficient water use
- Y02A20/124—Water desalination
- Y02A20/131—Reverse-osmosis
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Abstract
The invention provides a wind power isolated grid sea water desalination system and belongs to the fields of wind power generation and sea water desalination treatment. The system includes: a micro-grid sub-system with wind power generation as main power supply; a sea water desalination sub-system being connected to the micro-grid sub-system and performing desalination to sea water by means of electric energy generated from a wind driven generator, wherein the sea water desalination sub-system comprises at least one reverse osmosis device and at least one electro-osmosis device; and a control sub-system detecting the quality of water generated from the reverse osmosis device. According to a design method of the wind power isolated grid sea water desalination system, the power supply and the load are arranged in a classified manner so that the system can effectively adapt with fluctuation and intermittence of the wind power supply, can achieve large-range continuous variable-load fined operation, can maximumly utilize wind power, can reduce start-and-stop times of the reverse osmosis device and is prolonged in the service life.
Description
Technical field
The present invention relates to wind-power electricity generation and sea water desaltination process field, refer to the lonely net seawater desalination system of a kind of wind-powered electricity generation especially.
Background technology
Fresh water is one of human society base substance of depending on for existence and development, is the source of all life.A lot of remote districts, the natural scarcity of island Freshwater resources, can only utilize brackish water or seawater to obtain fresh water through desalination process.
Most ripe desalination treatment technology relies on electrical energy drive.Remote districts or island cannot be introduced public electric wire net or introduce public electric wire net cost too high.And not only cost is high to adopt diesel generation, petroleum transported is also very difficult, and maintenance workload is large, poor reliability, not friendly to the environment.Therefore, wind-power electricity generation just becomes one of important way of alternative conventional energy resources generating.On the other hand; along with the ripe gradually of wind generating technology and the continuous accumulation of application experience; the application mode of wind-power electricity generation is also progressively widened; it combines with the seawater desalination system technology of highly energy-consuming, by mass-producing wind energy turbine set electricity on-site elimination, reduces and abandons wind, alleviates and be incorporated to the impact etc. that bulk power grid produces and will create larger value.
At present, divide with the annexation of wind-power seawater desalinization system power-equipment and public electric wire net, be mainly divided into non-grid type and lonely net type two type.
Wherein, non-grid-connected seawater desalination system using public electric wire net as the backup power source of seawater desalination system, its to the technical requirements of seawater desalination system side close to its conventional art.
For the lonely net seawater desalination system of wind-powered electricity generation, due to fluctuation and the intermittence of wind-powered electricity generation power supply, seawater desalination system needs the characteristic possessing varying load on a large scale.The technical scheme that the lonely net seawater desalination system of existing wind-powered electricity generation realizes load adjustable mainly contains: (1) seawater desalination system is made up of some separate units, and system cloud gray model is exerted oneself to adjust and realized by start/stop separate unit; (2) seawater desalination system can the membrane module of independent startup/stopping be made up of branched, and meanwhile, each membrane module dense water out place is provided with adjustable motorized valve.Seawater desalination system makes seawater desalination system when load power changes by pump frequency conversion and adjustable motorized valve cooperation, the pressure remained steady of each membrane module, thus ensures the life-span of seawater desalination system equipment.
In technique scheme, it is a kind of very extensive scheme that the start and stop by means of only separate unit or membrane module come that adjustment System exerts oneself.On the one hand, the power demand of seawater desalination system is discontinuous, goes back the cooperation control such as heavy dependence mains side energy storage link and maintains systems generate electricity in real time and power consumption balances; On the other hand, the product water not up to standard in the process such as separate unit or membrane module frequent start-stop, flushing forms waste of energy, affects equipment life.Meanwhile, owing to constraining the ability of system variable load operation on a large scale by membrane module self operational characteristic minimum stream quantitative limitation etc.
Summary of the invention
The technical problem to be solved in the present invention is to provide the lonely net seawater desalination system of a kind of wind-powered electricity generation, fluctuation and the intermittence of wind-powered electricity generation power supply can be overcome, to realize in system on a large scale variable load operation, utilize wind energy most possibly, reduce reverse osmosis unit start-stop time, extend system device work-ing life.
For solving the problems of the technologies described above, embodiments of the invention provide technical scheme as follows:
On the one hand, provide a kind of wind-powered electricity generation lonely net seawater desalination system, comprising:
Take wind-power electricity generation as the micro-capacitance sensor subsystem of primary source, including at least one by wind energy transformation is the aerogenerator of electric energy;
The electric energy be connected with described micro-capacitance sensor subsystem, utilized described aerogenerator to produce carries out seawater desalinating the sea water desaltination subsystem processed, described sea water desaltination subsystem includes at least one reverse osmosis unit and at least one electrodialysis unit, the input terminus of described reverse osmosis unit receives through pretreated seawater, output terminal is connected with fresh water tanks and brackish water water tank respectively, the input terminus of described electrodialysis unit is connected with brackish water water tank, and output terminal is connected with fresh water tanks;
Detect the control subsystem of the product water water quality of described reverse osmosis unit, when described reverse osmosis unit produces water water quality lower than the index preset, cut off the product water of described reverse osmosis unit and the connection of fresh water tanks, the product water of described reverse osmosis unit is connected with brackish water water tank.
Further, the lonely net seawater desalination system of described wind-powered electricity generation also comprises:
Carry out the foreseeable wind energy prediction module of wind in real time;
Energy management module;
Described wind energy prediction module is communicatively connected with energy management module, and described energy management module selects the default working point of coupling according to the recent wind energy re-set target value that described wind energy prediction module provides.
Further, described electrodialysis unit processes the water in described brackish water water tank according to the instruction of described energy management module, and the water after described electrodialysis unit process is imported described fresh water tanks.
Further, described reverse osmosis unit is made up of high-pressure pump, multiple independent reverse osmosis membrane assembly and energy recovery module, and described high pressure pump motor is connected with the bus of transformer with described micro-capacitance sensor subsystem by frequency transformer.
The reverse osmosis membrane assembly that difference between the working point load target that described energy management module provides according to the rated load ability of the current operational outfit of described reverse osmosis unit and described energy management module is determined exerting oneself of the reverse osmosis membrane assembly preferentially carrying out high-pressure pump variable frequency adjustment or required start/stop corresponding according to target operation points;
Described control subsystem comprises:
Accept the instruction of described energy management module, described reverse osmosis unit is carried out to the control module of high-pressure pump variable frequency adjustment or reverse osmosis membrane assembly corresponding to start/stop.
Described electrodialysis unit is connected with the bus of transformer with described micro-capacitance sensor subsystem by frequency transformer.
Described control subsystem comprises:
When the electricity that described aerogenerator produces fluctuates in the first preset range, regulate the first control module of the operating voltage of described electrodialysis unit.
Further, described system also comprises:
Carry out pretreated preprocessing subsystem to seawater, described pre-treatment includes but not limited to remove suspended substance, particle, bacterium, virus, colloid, larger molecular organics, and the input terminus of described reverse osmosis unit is connected with the output terminal of described preprocessing subsystem.
Further, described micro-capacitance sensor subsystem also comprises:
Energy storage device, during for the electricity that produces at described aerogenerator lower than the second preset value, powers the direct current energy of energy-storage battery for described sea water desaltination subsystem after invertor;
Described control subsystem comprises:
When the electricity that described aerogenerator produces is lower than the second preset value, control described energy storage device power for described sea water desaltination subsystem or when the electricity stored by described energy storage device is lower than the 3rd preset value, accept the second control module that energy management module instruction is charged to energy-storage battery.
Further, described micro-capacitance sensor subsystem also comprises:
Diesel generator set, during for again starting after described aerogenerator is all stopped transport, or when energy storage device is unavailable in sea water desaltination subsystem stopping process, starting the voltage that oil electric engine maintains micro-capacitance sensor subsystem, providing electric energy to load;
Described control subsystem comprises:
Control the 3rd control module of the voltage of described oil electric engine start and stop and the described micro-capacitance sensor subsystem of maintenance.
Further, described micro-capacitance sensor subsystem also comprises:
Relief arrangement, for produce at described aerogenerator electricity moment higher than the 4th preset value time, consume described aerogenerator produce part electric energy;
Described control subsystem comprises:
When the electricity that described aerogenerator produces is instantaneously higher than the 4th preset value, control the 4th control module that described relief arrangement consumes the part electric energy that described aerogenerator produces.
Further, described sea water desaltination subsystem also comprises:
Be connected, receive the dense water tank of the strong brine that described reverse osmosis unit exports with the output terminal of described reverse osmosis unit;
At least one the salt manufacturing electrodialysis unit be connected with described dense water tank, carries out process as the deferrable load in described sea water desaltination subsystem to the strong brine in described dense water tank and obtains salts substances.
Embodiments of the invention have following beneficial effect:
In such scheme, when the water quality that reverse osmosis unit exports is not up to standard, control subsystem is by the cut-out output terminal of reverse osmosis unit and the connection of fresh water tanks, and the water body exported by reverse osmosis unit imports brackish water water tank.Utilize electrodialysis unit to process the water body in brackish water water tank, the water after electrodialysis unit process imports fresh water tanks.In technical scheme of the present invention, water body not up to standard is stored also reprocessing and avoid waste, simultaneously using electrodialysis unit as tunable load in system, the fluctuation of wind-powered electricity generation power supply can be overcome, reduce start and stop reverse osmosis unit number of times, extend system device work-ing life, realize system on a large scale variable load operation, utilize wind energy most possibly.
Accompanying drawing explanation
Fig. 1 is the connection diagram of the micro-capacitance sensor subsystem of the lonely net seawater desalination system of embodiment of the present invention wind-powered electricity generation;
Fig. 2 is the structural representation of embodiment of the present invention sea water desaltination subsystem;
Fig. 3 is the structural representation of another embodiment of the present invention sea water desaltination subsystem.
Reference numeral:
1-aerogenerator, 2-diesel generator set, 3-relief arrangement, 4-energy-storage transformer, the two-way invertor of 5-, 6-energy-storage battery group, 7-reverse osmosis unit transformer, 8-frequency transformer, 9-high-pressure pump, 10-electrodialysis unit transformer, 11-frequency transformer, 12-electrodialysis cell, 13-salt manufacturing electrodialysis unit transformer, 14-invertor, 15-salt manufacturing electrodialysis cell, 16-micro-capacitance sensor bus, 17-control subsystem, 18-preprocessing subsystem, 19-reverse osmosis unit, 20, three-way control valve, 21-fresh water tanks, 22-brackish water water tank, the dense water tank of 23-, 24-wind energy prediction module
Embodiment
For embodiments of the invention will be solved technical problem, technical scheme and advantage clearly, be described in detail below in conjunction with the accompanying drawings and the specific embodiments.
Embodiments of the invention provide a kind of wind-powered electricity generation lonely net seawater desalination system, can overcome fluctuation and the intermittence of wind-powered electricity generation power supply, realize system on a large scale variable load operation, utilize wind energy most possibly, extend system device work-ing life.
The lonely net seawater desalination system of wind-powered electricity generation of the present invention comprises:
Take wind-power electricity generation as the micro-capacitance sensor subsystem of primary source, including at least one by wind energy transformation is the aerogenerator of electric energy;
The electric energy be connected with described micro-capacitance sensor subsystem, utilized described aerogenerator to produce carries out seawater desalinating the sea water desaltination subsystem processed, described sea water desaltination subsystem includes at least one reverse osmosis unit and at least one electrodialysis unit, the input terminus of described reverse osmosis unit receives through pretreated seawater, output terminal is connected with fresh water tanks and brackish water water tank respectively, the input terminus of described electrodialysis unit is connected with brackish water water tank, and output terminal is connected with fresh water tanks;
Detect the control subsystem of the product water water quality of described reverse osmosis unit, when described reverse osmosis unit produces water water quality lower than the index preset, cut off the product water of described reverse osmosis unit and the connection of fresh water tanks, the product water of described reverse osmosis unit is connected with brackish water water tank.
Further, the lonely net seawater desalination system of described wind-powered electricity generation also comprises:
Carry out the foreseeable wind energy prediction module of wind in real time;
Energy management module;
Described wind energy prediction module is communicatively connected with energy management module, and described energy management module selects the default working point of coupling according to the recent wind energy re-set target value that described wind energy prediction module provides.
Described electrodialysis unit processes the water in described brackish water water tank according to the instruction of described energy management module, and the water after described electrodialysis unit process is imported described fresh water tanks.
Embodiments of the invention, when the water quality that reverse osmosis unit exports is not up to standard, control subsystem is by the cut-out output terminal of reverse osmosis unit and the connection of fresh water tanks, and the water body exported by reverse osmosis unit imports brackish water water tank.Utilize electrodialysis unit to process the water body in brackish water water tank, the water after electrodialysis unit process imports fresh water tanks.In technical scheme of the present invention, water body not up to standard is stored also reprocessing and avoid waste, simultaneously using electrodialysis unit as tunable load in system, fluctuation and the intermittence of wind-powered electricity generation power supply can be overcome, reduce start and stop reverse osmosis unit number of times, extend system device work-ing life, realize system on a large scale variable load operation, utilize wind energy most possibly.
Further, described reverse osmosis unit is made up of high-pressure pump, multiple independent reverse osmosis membrane assembly and energy recovery module, and described high pressure pump motor is connected with the bus of transformer with described micro-capacitance sensor subsystem by frequency transformer.
Further, the reverse osmosis membrane assembly that the reverse osmosis membrane assembly that the difference between the working point load target that provides according to the rated load ability of the current operational outfit of described reverse osmosis unit and described energy management module of described energy management module determines preferentially to carry out high-pressure pump variable frequency adjustment is exerted oneself or required start/stop corresponding according to target operation points;
Described control subsystem comprises: accept described energy management module instruction, reverse osmosis unit is carried out to the control module of high-pressure pump variable frequency adjustment or reverse osmosis membrane assembly corresponding to start/stop.
Described electrodialysis unit is connected with the bus of transformer with described micro-capacitance sensor subsystem by frequency transformer.
Described control subsystem comprises:
When the electricity that described aerogenerator produces fluctuates in the first preset range, regulate the first control module of the operating voltage of described electrodialysis unit.
Further, described system also comprises:
Carry out pretreated preprocessing subsystem to seawater, described pre-treatment includes but not limited to remove suspended substance, particle, bacterium, virus, colloid, larger molecular organics, and the input terminus of described reverse osmosis unit is connected with the output terminal of described preprocessing subsystem.
Further, described micro-capacitance sensor subsystem also comprises:
Energy storage device, during for the electricity that produces at described aerogenerator lower than the second preset value, powers the direct current energy of energy-storage battery for described sea water desaltination subsystem after invertor;
Described control subsystem comprises:
When the electricity that described aerogenerator produces is lower than the second preset value, control described energy storage device power for described sea water desaltination subsystem or when the electricity stored by described energy storage device is lower than the 3rd preset value, accept the second control module that energy management module instruction is charged to energy-storage battery.
Further, described micro-capacitance sensor subsystem also comprises:
Diesel generator set, during for again starting after described aerogenerator is all stopped transport, or when energy storage device is unavailable in sea water desaltination subsystem stopping process, starting the voltage that oil electric engine maintains micro-capacitance sensor subsystem, providing electric energy to load;
Described control subsystem comprises:
Control the 3rd control module of the voltage of described oil electric engine start and stop and the described micro-capacitance sensor subsystem of maintenance.
Further, described micro-capacitance sensor subsystem also comprises:
Relief arrangement, for produce at described aerogenerator electricity moment higher than the 4th preset value time, consume described aerogenerator produce part electric energy;
Described control subsystem comprises:
When the electricity that described aerogenerator produces is instantaneously higher than the 4th preset value, control the 4th control module that described relief arrangement consumes the part electric energy that described aerogenerator produces.
Further, described sea water desaltination subsystem also comprises:
Be connected, receive the dense water tank of the strong brine that described reverse osmosis unit exports with the output terminal of described reverse osmosis unit;
At least one the salt manufacturing electrodialysis unit be connected with described dense water tank, carries out process as the deferrable load in described sea water desaltination subsystem to the strong brine in described dense water tank and obtains salts substances.
Below in conjunction with accompanying drawing, the lonely net seawater desalination system of wind-powered electricity generation of the present invention is described in detail:
As shown in Figure 1, in the lonely net seawater desalination system of wind-powered electricity generation of the present invention, by the aerogenerator 1 in micro-capacitance sensor subsystem and diesel generator set 2 for micro-capacitance sensor provides electric energy, the relief arrangement 3 of sea water desaltination subsystem is the load of micro-capacitance sensor, energy storage device has two-way function, not only as power supply with but also as load.Control (PLC) subsystem 17, wind energy prediction module 24 are the load of micro-capacitance sensor.Sea water desaltination subsystem includes reverse osmosis unit, electrodialysis unit, and further, sea water desaltination subsystem can also include salt manufacturing electrodialysis unit.
Wherein, energy storage device includes energy-storage battery group 6, two-way invertor 5 and energy-storage transformer 4, and energy-storage battery group 6 is connected with micro-capacitance sensor bus 16 by energy-storage transformer 4 with two-way invertor 5.Reverse osmosis unit includes at least one group of high-pressure pump 9, frequency transformer 8 and reverse osmosis unit transformer 7, high-pressure pump 9 and corresponding frequency transformer 8 form one group of reverse osmosis module, and many group reverse osmosis modules are connected with micro-capacitance sensor bus 16 by reverse osmosis unit transformer 7 in parallel.Electrodialysis unit includes electrodialysis cell 12, frequency transformer 11 and electrodialysis unit transformer 10, and electrodialysis cell 12 is connected with micro-capacitance sensor bus 16 with electrodialysis unit transformer 10 by frequency transformer 11.Salt manufacturing electrodialysis unit includes salt manufacturing electrodialysis cell 15, invertor 14 and salt manufacturing electrodialysis unit transformer 13, and salt manufacturing electrodialysis cell 15 is connected with micro-capacitance sensor bus 16 with salt manufacturing electrodialysis unit transformer 13 by invertor 14.Relief arrangement 3 is directly connected with micro-capacitance sensor bus 16.
As shown in Figure 2, when sea water desaltination subsystem only possesses seawater desalination functions, sea water desaltination subsystem includes reverse osmosis unit 19 and electrodialysis unit, the input terminus of reverse osmosis unit is connected with high-pressure pump 9, seawater after high-pressure pump 9 is pressurizeed enters reverse osmosis unit, the output terminal (i.e. water outlet) of reverse osmosis unit is connected with fresh water tanks 21 and brackish water water tank 22 respectively by three-way control valve 20, and brackish water water tank 22 is for storing reverse osmosis unit start and stop, fresh water flush or varying load process product water not up to standard; When the electric energy that wind-power electricity generation subsystem produces is sufficient, the fresh water that reverse osmosis unit produces is qualified, will import fresh water tanks 21; When the energy fluctuation that wind-power electricity generation subsystem produces or deficiency, the fresh water that reverse osmosis unit produces is defective, will import brackish water water tank 22; The input terminus of electrodialysis cell 12 is connected with brackish water water tank 22, for processing the water body in brackish water water tank 22, produces qualified fresh water, and the fresh water generated is imported fresh water tanks 21.Further, the lonely net seawater desalination system of wind-powered electricity generation also comprises and carries out pretreated preprocessing subsystem to seawater, seawater imports high-pressure pump 9 after preprocessing subsystem process, by high-pressure pump 9, seawater is imported reverse osmosis unit 19 again, wherein, after seawater is transported to preprocessing subsystem, preprocessing subsystem can add sterilant (as clorox) in water, coagulating agent (as polymerize aluminum chloride or iron trichloride) and coagulant aids (as polyacrylamide), carry out air-float filtration or coagulating sedimentation and sand filtration process, ultrafiltration apparatus is utilized to filter out suspended substance in seawater afterwards, particle, bacterium, virus and colloid, larger molecular organics etc.
As shown in Figure 3, not only seawater desalination functions is possessed at sea water desaltination subsystem, when also possessing salt manufacturing function, sea water desaltination subsystem includes reverse osmosis unit 19, salt manufacturing electrodialysis unit and desalination electrodialysis unit, the input terminus of reverse osmosis unit is connected with high-pressure pump 9, seawater after high-pressure pump 9 is pressurizeed enters reverse osmosis unit, the output terminal (i.e. water outlet) of reverse osmosis unit is connected with fresh water tanks 21 and brackish water water tank 22 respectively by three-way control valve 20, brackish water water tank 22 is for storing reverse osmosis unit start and stop, fresh water flush or varying load process product water not up to standard, when the electric energy that wind-power electricity generation subsystem produces is sufficient, the fresh water that reverse osmosis unit produces is qualified, will import fresh water tanks 21, when the energy fluctuation that wind-power electricity generation subsystem produces or deficiency, the fresh water that reverse osmosis unit produces is defective, will import brackish water water tank 22, the input terminus of electrodialysis cell 12 is connected with brackish water water tank 22, for processing the water body in brackish water water tank 22, produces qualified fresh water, and the fresh water generated is imported fresh water tanks 21.The input terminus of salt manufacturing electrodialysis cell 15 is connected with dense water tank 23, in dense water tank 23, store the strong brine obtained through reverse osmosis unit 19, and salt manufacturing electrodialysis cell 15 pairs of strong brines process the raw material obtaining purified salt or salt chemical engineering.Further, the lonely net seawater desalination system of wind-powered electricity generation also comprises and carries out pretreated preprocessing subsystem to seawater, seawater imports high-pressure pump 9 after preprocessing subsystem process, by high-pressure pump 9, seawater is imported reverse osmosis unit 19 again, wherein, after seawater is transported to preprocessing subsystem, preprocessing subsystem can add sterilant (as clorox) in water, coagulating agent (as polymerize aluminum chloride or iron trichloride) and coagulant aids (as polyacrylamide), carry out air-float filtration or coagulating sedimentation and sand filtration process, ultrafiltration apparatus is utilized to filter out suspended substance in seawater afterwards, particle, bacterium, virus and colloid, larger molecular organics etc.
Wherein, wind energy prediction module is used for carrying out wind energy prediction in real time, and wind energy prediction module is connected with control subsystem by communication cable.Wind energy prediction module is communicatively connected with energy management module.Described energy management module selects the default working point of coupling according to the recent wind energy re-set target value that described wind energy prediction module provides.
Control subsystem includes multiple survey sensor and metering facility, for monitoring the state parameter of relevant devices in the lonely net seawater desalination system of wind-powered electricity generation and system operational parameters etc., above-mentioned survey sensor and metering facility are connected with monitored device, circuit and pipeline as required.Control subsystem is also for carrying out energy management, cooperation control, process monitoring to micro-capacitance sensor and load, auxiliary link etc.Particularly, control subsystem can be realized by PLC, and comprises human-computer interaction device etc.
Particularly, control subsystem includes the online water quality detection equipment of the output terminal being arranged on reverse osmosis unit, the fresh water water quality that reverse osmosis unit exports can be detected, when the water quality of described reverse osmosis unit output terminal is lower than the index preset, cut off the output terminal of described reverse osmosis unit and the connection of fresh water tanks, the output terminal of described reverse osmosis unit is connected with brackish water water tank; Described electrodialysis unit processes the water in described brackish water water tank, and the water after described electrodialysis unit process is imported fresh water tanks.
In addition, the difference of working point load target that control subsystem can provide according to the rated load ability of the current operational outfit of reverse osmosis unit and energy management module determines preferentially to carry out the reverse osmosis membrane assembly of high-pressure pump variable frequency adjustment or reverse osmosis membrane assembly corresponding to start/stop.The electricity that control subsystem can also produce according to aerogenerator regulates electrodialysis unit, particularly, when the electricity that aerogenerator produces fluctuates in the first preset range, regulates the operating voltage of electrodialysis unit; The electricity that can also produce according to aerogenerator controls energy storage device, particularly, when the electricity that aerogenerator produces is lower than the second preset value, by the direct current energy of the energy-storage battery group of energy storage device after invertor for sea water desaltination subsystem is powered, when the electricity stored by energy storage device is lower than the 3rd preset value, accepts energy management module instruction and energy-storage battery is charged; Can also control diesel generator set according to the working order of aerogenerator, when again starting after aerogenerator is all stopped transport, or when in sea water desaltination subsystem stopping process, energy storage device is unavailable, start the voltage that oil electric engine maintains micro-capacitance sensor subsystem, provide electric energy to load; The electricity that can also produce according to aerogenerator controls relief arrangement, when the electricity that aerogenerator produces is instantaneously higher than the 4th preset value, controls the part electric energy that relief arrangement consumes aerogenerator generation.
The algorithm of the lonely net seawater desalination system of wind-powered electricity generation of the present invention is as follows:
Step one: set up independent micro-capacitance sensor framework by aerogenerator, relief arrangement, energy storage device and two-way invertor, oil electric engine etc., and relief arrangement is connected with micro-capacitance sensor bus.Oil electric engine is used for the startup of first typhoon power generator and the basis charging of energy storage device.
Step 2: each aerogenerator is incorporated to micro-capacitance sensor by controller of fan and frequency transformer.
Step 3: be connected with the transformer output lines of reverse osmosis unit by the power-driven pump etc. of preprocessing subsystem, connects frequency transformer by high-pressure pump and topping-up pump and is connected with the transformer output lines of reverse osmosis unit.
Step 4: the service pump of electrodialysis unit, recycle pump etc. are exported with the transformer of electrodialysis unit and is connected, electrodialysis cell is connected with the transformer of electrodialysis unit by alternating current-direct current frequency transformer.
Step 5: control subsystem is connected with wind energy prediction module, realizes monitoring, the management to whole micro-capacitance sensor subsystem by the state of each device of Real-Time Monitoring and controls.
In whole system is run, provide the current expectation target load of system by wind energy prediction module, then to be run by control subsystem system ensemble and each device upstate provides system loading dispatch command.Wherein, being made as sensitive load (important load) with reverse osmosis, take electrodialysis unit as deferrable load.Meanwhile, mains side has blower variable-pitch power regulation, the discharge and recharge of energy storage device, and relief arrangement needs startup in time etc. to realize the energy management of micro-capacitance sensor subsystem and power balance according to power system transient stability.
In actual motion, the sequencing of load operation is: first adjustment electrodialysis unit is exerted oneself and overcome the random fluctuation of microgrid power, secondly reverse osmosis unit pump group variable frequency adjustment, is finally the start/stop operation of independent unit or membrane module in reverse osmosis unit.Accordingly, mains side adjustment order is: blower variable-pitch power operation, energy storage device electric discharge.In order to extend the energy storage device energy-storage battery group life-span, battery charging mode according to user should export in conjunction with wind energy prediction and in a planned way carry out, to reduce charging times.Relief arrangement and oil electric engine are respectively as the emergency use link of load and mains side.In system, above-mentioned each link device is all furnished with electric protection loop, to guarantee that device is operated in safety range in all cases.Especially, electrodialysis unit is as random two-way tunable load, and coupled frequency transformer output was provided with, voltage limit controls and protection, was no more than its limiting current to make device working current.
The typical micro-capacitance sensor structure of framework of the present invention, can be incorporated to independent micro-capacitance sensor by high-power grid type blower fan, and realize isolated power grid.Hierarchical layered design and the control of coupling system load, can realize the on-site elimination of extensive wind field electricity, alleviates wind power integration bulk power grid to the impact of system, reduces wind field and abandon wind rate.The present invention produces water water quality in conjunction with reverse osmosis unit and changes thereupon and need to avoid load impact as far as possible, reduce the demand of the intrinsiccharacteristics such as frequent start-stop when obtaining electric energy and be changeable, take and electrodialysis unit composite design, to the product water not up to standard of reverse osmosis unit output in fluctuation of load process or start and stop, flushing process further by electrodialysis unit process.Such design has played electrodialysis unit on the one hand and has been applicable to brackish water desalination and is easy to, as the advantage of deferrable load operation, on the other hand, make full use of reverse osmosis unit product water not up to standard, be equivalent to refuse reclamation, improve entire system efficiency of energy utilization.The lonely net seawater desalination system of wind-powered electricity generation of the present invention is suitable for variable parameter operation on a large scale, decreases the start-stop time of reverse osmosis unit or membrane module, decreases the discharge and recharge number of times of micro-capacitance sensor subsystem energy storage device, greatly can extend system device work-ing life.Simultaneously, electrodialysis unit salt manufacturing can also be utilized, that the operability of further enhanced system, handiness and energy are dispatched becomes more meticulous, and carries out the comprehensive utilization of large-scale Energy resources and exploitation integral system under being particluarly suitable for many-sided harmonious condition such as wind-resources, sea conditions and fresh water demand.
The above is the preferred embodiment of the present invention; it should be pointed out that for those skilled in the art, under the prerequisite not departing from principle of the present invention; can also make some improvements and modifications, these improvements and modifications also should be considered as protection scope of the present invention.
Claims (12)
1. the lonely net seawater desalination system of wind-powered electricity generation, is characterized in that, comprising:
Take wind-power electricity generation as the micro-capacitance sensor subsystem of primary source, including at least one by wind energy transformation is the aerogenerator of electric energy;
The electric energy be connected with described micro-capacitance sensor subsystem, utilized described aerogenerator to produce carries out seawater desalinating the sea water desaltination subsystem processed, described sea water desaltination subsystem includes at least one reverse osmosis unit and at least one electrodialysis unit, the input terminus of described reverse osmosis unit receives through pretreated seawater, output terminal is connected with fresh water tanks and brackish water water tank respectively, the input terminus of described electrodialysis unit is connected with brackish water water tank, and output terminal is connected with fresh water tanks;
Detect the control subsystem of the product water water quality of described reverse osmosis unit, when described reverse osmosis unit produces water water quality lower than the index preset, cut off the product water of described reverse osmosis unit and the connection of fresh water tanks, the product water of described reverse osmosis unit is connected with brackish water water tank.
2. the lonely net seawater desalination system of wind-powered electricity generation according to claim 1, it is characterized in that, described system also comprises:
Carry out the foreseeable wind energy prediction module of wind in real time;
Energy management module;
Described wind energy prediction module is communicatively connected with energy management module, and described energy management module selects the default working point of coupling according to the recent wind energy re-set target value that described wind energy prediction module provides.
3. the lonely net seawater desalination system of wind-powered electricity generation according to claim 2, it is characterized in that, described electrodialysis unit processes the water in described brackish water water tank according to the instruction of described energy management module, and the water after described electrodialysis unit process is imported described fresh water tanks.
4. the lonely net seawater desalination system of wind-powered electricity generation according to claim 1, it is characterized in that, described reverse osmosis unit is made up of high-pressure pump, multiple independent reverse osmosis membrane assembly and energy recovery module, and described high pressure pump motor is connected with the bus of transformer with described micro-capacitance sensor subsystem by frequency transformer.
5. the lonely net seawater desalination system of wind-powered electricity generation according to claim 2, it is characterized in that, the reverse osmosis membrane assembly that the difference between the working point load target that described energy management module provides according to the rated load ability of the current operational outfit of described reverse osmosis unit and described energy management module is determined exerting oneself of the reverse osmosis membrane assembly preferentially carrying out high-pressure pump variable frequency adjustment or required start/stop corresponding according to target operation points;
Described control subsystem comprises:
Accept the instruction of described energy management module, described reverse osmosis unit is carried out to the control module of high-pressure pump variable frequency adjustment or reverse osmosis membrane assembly corresponding to start/stop.
6. the lonely net seawater desalination system of wind-powered electricity generation according to claim 1, it is characterized in that, described electrodialysis unit is connected with the bus of transformer with described micro-capacitance sensor subsystem by frequency transformer.
7. the lonely net seawater desalination system of wind-powered electricity generation according to claim 1, it is characterized in that, described control subsystem comprises:
When the electricity that described aerogenerator produces fluctuates in the first preset range, regulate the first control module of the operating voltage of described electrodialysis unit.
8. the lonely net seawater desalination system of wind-powered electricity generation according to claim 1, it is characterized in that, further, described system also comprises:
Carry out pretreated preprocessing subsystem to seawater, described pre-treatment includes but not limited to remove suspended substance, particle, bacterium, virus, colloid, larger molecular organics, and the input terminus of described reverse osmosis unit is connected with the output terminal of described preprocessing subsystem.
9. the lonely net seawater desalination system of wind-powered electricity generation according to claim 2, it is characterized in that, described micro-capacitance sensor subsystem also comprises:
Energy storage device, during for the electricity that produces at described aerogenerator lower than the second preset value, powers the direct current energy of energy-storage battery for described sea water desaltination subsystem after invertor;
Described control subsystem comprises:
When the electricity that described aerogenerator produces is lower than the second preset value, control described energy storage device power for described sea water desaltination subsystem or when the electricity stored by described energy storage device is lower than the 3rd preset value, accept the second control module that energy management module instruction is charged to energy-storage battery.
10. the lonely net seawater desalination system of wind-powered electricity generation according to claim 9, it is characterized in that, described micro-capacitance sensor subsystem also comprises:
Diesel generator set, during for again starting after described aerogenerator is all stopped transport, or when energy storage device is unavailable in sea water desaltination subsystem stopping process, starting the voltage that oil electric engine maintains micro-capacitance sensor subsystem, providing electric energy to load;
Described control subsystem comprises:
Control the 3rd control module of the voltage of described oil electric engine start and stop and the described micro-capacitance sensor subsystem of maintenance.
The lonely net seawater desalination system of 11. wind-powered electricity generation according to claim 1, it is characterized in that, described micro-capacitance sensor subsystem also comprises:
Relief arrangement, for produce at described aerogenerator electricity moment higher than the 4th preset value time, consume described aerogenerator produce part electric energy;
Described control subsystem comprises:
When the electricity that described aerogenerator produces is instantaneously higher than the 4th preset value, control the 4th control module that described relief arrangement consumes the part electric energy that described aerogenerator produces.
The lonely net seawater desalination system of 12. wind-powered electricity generation according to claim 1, it is characterized in that, described sea water desaltination subsystem also comprises:
Be connected, receive the dense water tank of the strong brine that described reverse osmosis unit exports with the output terminal of described reverse osmosis unit;
At least one the salt manufacturing electrodialysis unit be connected with described dense water tank, carries out process as the deferrable load in described sea water desaltination subsystem to the strong brine in described dense water tank and obtains salts substances.
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