CN105444437B - The light field flow rate of molten salt of slot type light thermo-power station with defocus regulation cooperative control device - Google Patents
The light field flow rate of molten salt of slot type light thermo-power station with defocus regulation cooperative control device Download PDFInfo
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- CN105444437B CN105444437B CN201510813404.7A CN201510813404A CN105444437B CN 105444437 B CN105444437 B CN 105444437B CN 201510813404 A CN201510813404 A CN 201510813404A CN 105444437 B CN105444437 B CN 105444437B
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- 150000003839 salts Chemical class 0.000 title claims abstract description 159
- 238000004891 communication Methods 0.000 claims abstract description 7
- 238000002844 melting Methods 0.000 claims description 51
- 230000008018 melting Effects 0.000 claims description 51
- 230000005611 electricity Effects 0.000 claims description 46
- 238000005286 illumination Methods 0.000 claims description 11
- 230000005855 radiation Effects 0.000 claims description 6
- 230000010354 integration Effects 0.000 claims description 5
- 230000001105 regulatory effect Effects 0.000 claims description 5
- 239000006185 dispersion Substances 0.000 claims description 4
- 239000000155 melt Substances 0.000 claims 4
- 238000010248 power generation Methods 0.000 abstract description 5
- 230000009286 beneficial effect Effects 0.000 abstract description 2
- 230000007774 longterm Effects 0.000 abstract description 2
- 238000000034 method Methods 0.000 description 7
- 239000000203 mixture Substances 0.000 description 4
- 238000005516 engineering process Methods 0.000 description 3
- 238000010586 diagram Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000010438 heat treatment Methods 0.000 description 2
- 238000009825 accumulation Methods 0.000 description 1
- 230000000903 blocking effect Effects 0.000 description 1
- 230000005494 condensation Effects 0.000 description 1
- 238000009833 condensation Methods 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 235000013399 edible fruits Nutrition 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 230000000630 rising effect Effects 0.000 description 1
- 238000012546 transfer Methods 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
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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
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- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E10/00—Energy generation through renewable energy sources
- Y02E10/40—Solar thermal energy, e.g. solar towers
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Abstract
The present invention relates to solar groove type photo-thermal power generation technical field, specifically a kind of light field flow rate of molten salt of slot type light thermo-power station with defocus regulation cooperative control device, regulation unit and Central co-ordination control unit are defocused including heat collecting field Flow-rate adjustment control unit, heat collecting field, the heat collecting field Flow-rate adjustment control unit defocuses regulation unit by communication network with the heat collecting field, and Unit two are connected with the Central co-ordination control unit respectively；The heat collecting field Flow-rate adjustment control unit is controlled according to the flow that the cold tank is exported that instructed of the Central co-ordination control unit, the present invention enables photo-thermal to send out dot system in time for Intensity of the sunlight difference, ensure that fuse salt steady flow is non-condensing when Intensity of the sunlight is poor, fuse salt temperature not overtemperature is controlled when Intensity of the sunlight is too strong simultaneously, can steadily in the long term be run with high efficiency under complicated various weather conditions beneficial to system.
Description
Technical field
The present invention relates to solar groove type photo-thermal power generation technical field, specifically a kind of light field fused salt of slot type light thermo-power station
Flow with defocus regulation cooperative control device.
Background technology
It is a kind of clean energy resource mode for concentrating the scale of carrying out elelctrochemical power generation that solar energy heating generates electricity.Trough system is current
In the middle of solar energy heating generation mode, technology maturity and commercialization checking degree highest.Heat required for solar energy thermal-power-generating
Source is all from solar irradiation, and the intensity of illumination of solar irradiation Each point in time in a day has very big difference, due to
Solar light-heat power-generation system shutdown process is long, and complex steps, cost is larger.
When light conditions are moderate, it is necessary to control the outlet temperature of heat collecting field fuse salt by heat collecting field Flow-rate adjustment,
Ensure that heat exchanger has operating efficiency higher.And with the reduction of intensity of illumination, exceedingly reduced by flow regulator molten
Melt salt flow and would potentially result in pipeline fuse salt and condense blocking.Now how to keep in solar light-heat power-generation system in pipeline
Fuse salt constant flow, it is to avoid condensation phenomenon occurs and is particularly important.On the other hand, with the increase of intensity of illumination,
The means for suppressing the temperature rising of heat collecting field outlet by increasing fuse salt flow can also fail, and at this moment need to introduce heat collecting field
Control is defocused to avoid fuse salt temperature overtemperature.Due to flow control and defocus control all be control heat collecting field outlet temperature, such as
Both fruits can not coordinate, it would be possible to which the competition of generator controller triggers the frequent switching of the two.
Existing patent such as Patent No. CN201310390655.X, CN201210073483.9, CN201310254824.7
And the Chinese invention patent such as CN201310035468.X.
Wherein CN201310390655.X is a kind of form utilized using solar energy thermal-power-generating, and system is free of heat accumulation portion
Point, flow is not related to and coordination control is defocused；And whole system heat transfer medium is water；CN201210073483.9 is the slot type sun
The experimental rig of energy heat collector, only includes solar-thermal generating system heat collector and its associated components, and design system coordinates control,
And apparatus structure has different in the present invention.
CN201310254824.7 is the invention of slot type solar-thermal generating system heat collector (condenser) control method, with this
The system-level invention control hierarchy that invention is related to is differed, and the present invention is not related to Unit Level or component-level to control, and relates generally to
Each device, the coordination control of part.
In sum, above-mentioned patent does not solve the technical problem being previously mentioned in background technology.
The content of the invention
Above-mentioned to avoid the occurrence of, the present invention proposes a kind of light field flow rate of molten salt of slot type light thermo-power station and defocuses tune
Section cooperative control device.For achieving the above object, technical scheme is as follows.
A kind of light field flow rate of molten salt of slot type photo-thermal electric power station system with defocus regulation cooperative control device, it is characterised in that：
Slot type light thermo-power station includes cold tank, heat collecting field and electricity generation system, and the cold tank includes the first cold tank entrance, the
Two cold tank entrances and cold tank are exported, and the heat collecting field includes the outlet of the first heat collecting field, the outlet of the second heat collecting field and heat collecting field entrance,
The electricity generation system includes that electricity generation system entrance and electricity generation system are exported；The cold tank outlet is connected to described by the 3rd pipeline
Heat collecting field entrance, the cold tank outlet is also equipped with melting salt pump A；The first heat collecting field outlet is connected to by the first pipeline
The electricity generation system entrance, the electricity generation system outlet is connected to the described first cold tank entrance, described second by the 4th pipeline
Heat collecting field outlet is connected to the described second cold tank entrance by second pipe.
The light field flow rate of molten salt of slot type light thermo-power station includes heat collecting field Flow-rate adjustment control with regulation cooperative control device is defocused
Unit processed, heat collecting field defocus regulation unit and Central co-ordination control unit.The heat collecting field Flow-rate adjustment control unit
Regulation unit is defocused by communication network with the heat collecting field, is connected with the Central co-ordination control unit respectively.It is described
Heat collecting field Flow-rate adjustment control unit completes the flow control that cold tank is exported according to the instruction of the Central co-ordination control unit.Institute
State to defocus regulation unit and complete heat collecting field according to the instruction of the Central co-ordination control unit and defocus control.The center
Coordinate fuse salt flow path of the control unit according to the feedback control heat collecting field of the heat collecting field Flow-rate adjustment control unit, together
When the internal regulation state of heat collecting field Flow-rate adjustment control unit be sent to described defocus regulation unit.
The flow of slot type light thermo-power station with defocus regulation control method for coordinating, it is characterised in that：
The Central co-ordination control unit is to heat collecting field Flow-rate adjustment control unit setting heat collecting field outlet fuse salt
Rated temperature is Thot_e, according to molten salt characteristics set melting salt pump maximum stream flow asAnd minimum discharge
When flow regulating function is not reaching to the upper limit, i.e., flow is not reaching to maximum stream flowWhen, the center association
Adjusting control unit not start the heat collecting field and defocus regulation unit carries out defocusing regulation, only starts the heat collecting field flow tune
Section control unit carries out Flow-rate adjustment, control heat collecting field outlet fuse salt temperature Thot；
When Flow-rate adjustment reaches the upper limit, and intensity of illumination, still when increasing, the Central co-ordination control unit will be opened
The dynamic heat collecting field defocuses regulation unit and carries out defocusing regulation, reduces the solar radiation that heat collecting field absorbs, and maintains it to export
Temperature of molten salt.
The heat collecting field Flow-rate adjustment control unit carries out concretely comprising the following steps for the Flow-rate adjustment：
A) with heat collecting field outlet fuse salt temperature ThotIt is control targe, with the cold tank outlet melting salt pump A flows
It is controlled quentity controlled variable；Work as Thot＜ Thot_eWhen, with Δ Tcontyl=Thot_e-ThotIt is the cold tank outlet melting salt pump A flowsRegulation
Foundation, adoption rate integration control is gradually reduced the theoretical delivery of the cold tank outlet melting salt pump AWork as Thot＞ Thot_e
When, with Δ Tcontrl=Thot-Thot_eIt is the cold tank outlet melting salt pump A flowsRegulation foundation, gradually increases described cold
The theoretical delivery of tank outlet melting salt pump A
B) theoretical delivery of melting salt pump ABy maximum stream flowAnd minimum dischargeSalt pump A is formed after amplitude limit
Actual control flowI.e.
C) it is when the cold tank outlet melting salt pump A flows reach minimum discharge limit valueAnd Thot＜ Thot_e
When, stop the outlet of the first heat collecting field and fuse salt is delivered to by electricity generation system entrance by the first pipeline, start the outlet of the second heat collecting field
Fuse salt is delivered to by the second cold tank entrance by second pipe, the fuse salt loop of the cold tank of cold tank --- heat collecting field --- is formed；
When the cold tank outlet melting salt pump A flows are more than minimum discharge limit valueOr heat collecting field outlet
Temperature is more than or equal to rated temperature Thot≥Thot_eWhen, start the first heat collecting field outlet and sent fuse salt by the first pipeline
To the electricity generation system entrance, electricity generation system outlet connects the first cold tank entrance by pipeline, stops second heat collecting field and goes out
Fuse salt is delivered to the described second cold tank entrance by mouth by second pipe, forms cold tank --- heat collecting field --- electricity generation system ---
The fuse salt loop of cold tank.
The heat collecting field defocuses regulation unit and carries out defocusing concretely comprising the following steps for regulation：
A) define heat collecting field defocusing coefficient k (0≤k≤1) represent heat collecting field defocus after absorb solar energy with defocus preceding reason
By the ratio between solar energy that can above absorb；K=1 indicates that k=0 represented and defocus completely without defocusing, and the dispersion of the expressed portions of 0 ＜ k ＜ 1 is burnt；
After defocusing coefficient k is issued heat collecting field controller by plant controller, heat collecting field controller is by adjusting the orientation of heat collector
Realization is defocused；Plant controller is with heat collecting field defocusing coefficient k as control targe.
B) when the theoretical delivery of the cold tank outlet melting salt pump AWhen, defocus regulation flow errorWhenWhen defocus regulation flow error
C) calculated according to equation below and defocus adjustment factor：
The advantage of the invention is that：
1st, a kind of light field flow rate of molten salt of slot type light thermo-power station with defocus regulation cooperative control device, make photo-thermal send out dot system
Intensity of the sunlight difference can be in time directed to, it is ensured that fuse salt steady flow is non-condensing when Intensity of the sunlight is poor, together
When fuse salt temperature not overtemperature is controlled when Intensity of the sunlight is too strong, can be with complicated various weather conditions beneficial to system
High efficiency is run steadily in the long term.
2nd, in the case of solar irradiation is very sufficient, although it is all control fuse salt that flow controls and defocus control target
Outlet temperature, but under coordinated control mode of the invention, flow control uses outlet temperature error as control foundation, to flow
It is controlled quentity controlled variable to measure；And defocus control use flow error as control foundation, defocusing coefficient is controlled quentity controlled variable, the two control foundation with
Controlled quentity controlled variable is differed.Although this causes two kinds of controllers simultaneously in work, in the absence of competing with one another for and asking of switching repeatedly
Topic.
3rd, when solar irradiation is abundant, heat collecting field exit point temperature control is realized by Flow-rate adjustment means, is only existed
When Flow-rate adjustment reaches limit value, defocusing regulation just can automatic.This control method for coordinating enables light thermo-power station one side
Enough ensure fuse salt not overtemperature, on the other hand can to greatest extent reduce the solar energy loss for defocusing and bringing, improve operation effect
Rate.
4th, solar irradiation is bad or during no light, switching and Flow-rate adjustment means by low discharge circulation loop,
On the one hand ensure that fuse salt steady flow is non-condensing, on the other hand also can to greatest extent reduce system energy loss,
Improve operational efficiency.
Brief description of the drawings
Fig. 1 is using the slot type photo-thermal Power station structure schematic diagram of embodiments of the invention.
Fig. 2 is to coordinate control with regulation is defocused using the light field flow rate of molten salt of the slot type light thermo-power station of embodiments of the invention
Structure drawing of device.
Fig. 3 is the schematic diagram for coordinating flow regulator in control using embodiments of the invention heat collecting field Flow-rate adjustment.
Fig. 4 is to coordinate control medium-small flow loop switch logic flow using embodiments of the invention heat collecting field Flow-rate adjustment
Figure.
Fig. 5 is to defocus regulation using embodiments of the invention to coordinate control principle drawing.
Fig. 6 is with illumination using the heat collecting field flow of embodiments of the invention, defocusing coefficient and outlet fuse salt temperature
Situation of change.
Specific embodiment
Embodiment 1
Slot type light thermo-power station includes cold tank, heat collecting field and electricity generation system, and the cold tank includes the first cold tank entrance, the
Two cold tank entrances and cold tank are exported, and the heat collecting field includes the outlet of the first heat collecting field, the outlet of the second heat collecting field and heat collecting field entrance,
The electricity generation system includes that electricity generation system entrance and electricity generation system are exported；The cold tank outlet is connected to described by the 3rd pipeline
Heat collecting field entrance, the cold tank outlet is also equipped with melting salt pump A；The first heat collecting field outlet is connected to by the first pipeline
The electricity generation system entrance, the electricity generation system outlet is connected to the described first cold tank entrance, described second by the 4th pipeline
Heat collecting field outlet is connected to the described second cold tank entrance by second pipe.
The light field flow rate of molten salt of slot type light thermo-power station is controlled with regulation cooperative control device is defocused by heat collecting field Flow-rate adjustment
Unit, heat collecting field defocus regulation unit and Central co-ordination control unit composition.The heat collecting field Flow-rate adjustment control is single
It is first to defocus regulation unit by communication network with the heat collecting field, it is connected with the Central co-ordination control unit respectively.Institute
State heat collecting field Flow-rate adjustment control unit and the flow control that cold tank is exported is completed according to the instruction of the Central co-ordination control unit.
The regulation unit that defocuses defocuses control according to the instruction completion heat collecting field of the Central co-ordination control unit.In described
Fuse salt flow path of the control unit according to the feedback control heat collecting field of the heat collecting field Flow-rate adjustment control unit is coordinated in centre,
The internal regulation state of heat collecting field Flow-rate adjustment control unit is sent to simultaneously described defocuses regulation unit.
The Central co-ordination control unit is to heat collecting field Flow-rate adjustment control unit setting heat collecting field outlet fuse salt
Rated temperature is Thot_e, according to molten salt characteristics set melting salt pump maximum stream flow asAnd minimum discharge
When flow regulating function is not reaching to the upper limit, i.e., flow is not reaching to maximum stream flowWhen, the center association
Adjusting control unit not start the heat collecting field and defocus regulation unit carries out defocusing regulation, only starts the heat collecting field flow tune
Section control unit carries out Flow-rate adjustment, control heat collecting field outlet fuse salt temperature Thot；
When Flow-rate adjustment reaches the upper limit, and intensity of illumination, still when increasing, the Central co-ordination control unit will be opened
The dynamic heat collecting field defocuses regulation unit and carries out defocusing regulation, reduces the solar radiation that heat collecting field absorbs, and maintains it to export
Temperature of molten salt.
Embodiment 2
Slot type light thermo-power station includes cold tank, heat collecting field and electricity generation system, and the cold tank includes the first cold tank entrance, the
Two cold tank entrances and cold tank are exported, and the heat collecting field includes the outlet of the first heat collecting field, the outlet of the second heat collecting field and heat collecting field entrance,
The electricity generation system includes that electricity generation system entrance and electricity generation system are exported；The cold tank outlet is connected to described by the 3rd pipeline
Heat collecting field entrance, the cold tank outlet is also equipped with melting salt pump A；The first heat collecting field outlet is connected to by the first pipeline
The electricity generation system entrance, the electricity generation system outlet is connected to the described first cold tank entrance, described second by the 4th pipeline
Heat collecting field outlet is connected to the described second cold tank entrance by second pipe.
The light field flow rate of molten salt of slot type light thermo-power station is controlled with regulation cooperative control device is defocused by heat collecting field Flow-rate adjustment
Unit, heat collecting field defocus regulation unit and Central co-ordination control unit composition.The heat collecting field Flow-rate adjustment control is single
It is first to defocus regulation unit by communication network with the heat collecting field, it is connected with the Central co-ordination control unit respectively.Institute
State heat collecting field Flow-rate adjustment control unit and the flow control that cold tank is exported is completed according to the instruction of the Central co-ordination control unit.
The regulation unit that defocuses defocuses control according to the instruction completion heat collecting field of the Central co-ordination control unit.In described
Fuse salt flow path of the control unit according to the feedback control heat collecting field of the heat collecting field Flow-rate adjustment control unit is coordinated in centre,
The internal regulation state of heat collecting field Flow-rate adjustment control unit is sent to simultaneously described defocuses regulation unit.
The flow of slot type light thermo-power station with defocus regulation control method for coordinating, it is characterised in that：
The Central co-ordination control unit is to heat collecting field Flow-rate adjustment control unit setting heat collecting field outlet fuse salt
Rated temperature is Thot_e, according to molten salt characteristics set melting salt pump maximum stream flow asAnd minimum discharge
When flow regulating function is not reaching to the upper limit, i.e., flow is not reaching to maximum stream flowWhen, the center association
Adjusting control unit not start the heat collecting field and defocus regulation unit carries out defocusing regulation, only starts the heat collecting field flow tune
Section control unit carries out Flow-rate adjustment, control heat collecting field outlet fuse salt temperature Thot；
When Flow-rate adjustment reaches the upper limit, and intensity of illumination, still when increasing, the Central co-ordination control unit will be opened
The dynamic heat collecting field defocuses regulation unit and carries out defocusing regulation, reduces the solar radiation that heat collecting field absorbs, and maintains it to export
Temperature of molten salt.
The heat collecting field Flow-rate adjustment control unit carries out concretely comprising the following steps for the Flow-rate adjustment：
A) with heat collecting field outlet fuse salt temperature ThotIt is control targe, with the cold tank outlet melting salt pump A flows
It is controlled quentity controlled variable；Work as Thot＜ Thot_eWhen, with Δ Tcontyl=Thot_e-ThotIt is the cold tank outlet melting salt pump A flowsRegulation
Foundation, adoption rate integration control is gradually reduced the theoretical delivery of the cold tank outlet melting salt pump AWork as Thot＞ Thot_e
When, with Δ Tcontyl=Thot-Thot_eIt is the cold tank outlet melting salt pump A flowsRegulation foundation, gradually increases described cold
The theoretical delivery of tank outlet melting salt pump A
B) theoretical delivery of melting salt pump ABy maximum stream flowAnd minimum dischargeSalt pump A is formed after amplitude limit
Actual control flowI.e.
C) it is when the cold tank outlet melting salt pump A flows reach minimum discharge limit valueAnd Thot＜ Thot_e
When, stop the outlet of the first heat collecting field and fuse salt is delivered to by electricity generation system entrance by the first pipeline, start the outlet of the second heat collecting field
Fuse salt is delivered to by the second cold tank entrance by second pipe, the fuse salt loop of the cold tank of cold tank --- heat collecting field --- is formed；
When the cold tank outlet melting salt pump A flows are more than minimum discharge limit valueOr heat collecting field outlet
Temperature is more than or equal to rated temperature Thot≥Thot_eWhen, start the first heat collecting field outlet and sent fuse salt by the first pipeline
To the electricity generation system entrance, electricity generation system outlet connects the first cold tank entrance by pipeline, stops second heat collecting field and goes out
Fuse salt is delivered to the described second cold tank entrance by mouth by second pipe, forms cold tank --- heat collecting field --- electricity generation system ---
The fuse salt loop of cold tank.
Embodiment 3
Slot type light thermo-power station includes cold tank, heat collecting field and electricity generation system, and the cold tank includes the first cold tank entrance, the
Two cold tank entrances and cold tank are exported, and the heat collecting field includes the outlet of the first heat collecting field, the outlet of the second heat collecting field and heat collecting field entrance,
The electricity generation system includes that electricity generation system entrance and electricity generation system are exported；The cold tank outlet is connected to described by the 3rd pipeline
Heat collecting field entrance, the cold tank outlet is also equipped with melting salt pump A；The first heat collecting field outlet is connected to by the first pipeline
The electricity generation system entrance, the electricity generation system outlet is connected to the described first cold tank entrance, described second by the 4th pipeline
Heat collecting field outlet is connected to the described second cold tank entrance by second pipe.
The light field flow rate of molten salt of slot type light thermo-power station is controlled with regulation cooperative control device is defocused by heat collecting field Flow-rate adjustment
Unit, heat collecting field defocus regulation unit and Central co-ordination control unit composition.The heat collecting field Flow-rate adjustment control is single
It is first to defocus regulation unit by communication network with the heat collecting field, it is connected with the Central co-ordination control unit respectively.Institute
State heat collecting field Flow-rate adjustment control unit and the flow control that cold tank is exported is completed according to the instruction of the Central co-ordination control unit.
The regulation unit that defocuses defocuses control according to the instruction completion heat collecting field of the Central co-ordination control unit.In described
Fuse salt flow path of the control unit according to the feedback control heat collecting field of the heat collecting field Flow-rate adjustment control unit is coordinated in centre,
The internal regulation state of heat collecting field Flow-rate adjustment control unit is sent to simultaneously described defocuses regulation unit.
The flow of slot type light thermo-power station with defocus regulation control method for coordinating, it is characterised in that：
The Central co-ordination control unit is to heat collecting field Flow-rate adjustment control unit setting heat collecting field outlet fuse salt
Rated temperature is Thot_e, according to molten salt characteristics set melting salt pump maximum stream flow asAnd minimum discharge
When flow regulating function is not reaching to the upper limit, i.e., flow is not reaching to maximum stream flowWhen, the center association
Adjusting control unit not start the heat collecting field and defocus regulation unit carries out defocusing regulation, only starts the heat collecting field flow tune
Section control unit carries out Flow-rate adjustment, control heat collecting field outlet fuse salt temperature Thot；
When Flow-rate adjustment reaches the upper limit, and intensity of illumination, still when increasing, the Central co-ordination control unit will be opened
The dynamic heat collecting field defocuses regulation unit and carries out defocusing regulation, reduces the solar radiation that heat collecting field absorbs, and maintains it to export
Temperature of molten salt.
The heat collecting field Flow-rate adjustment control unit carries out concretely comprising the following steps for the Flow-rate adjustment：
A) with heat collecting field outlet fuse salt temperature ThotIt is control targe, with the cold tank outlet melting salt pump A flows
It is controlled quentity controlled variable；Work as Thot＜ Thot_eWhen, with Δ Tcontrl=Thot_e-ThotIt is the cold tank outlet melting salt pump A flowsRegulation
Foundation, adoption rate integration control is gradually reduced the theoretical delivery of the cold tank outlet melting salt pump AWork as Thot＞ Thot_e
When, with Δ Tcontrl=Thot-Thot_eIt is the cold tank outlet melting salt pump A flowsRegulation foundation, gradually increases described cold
The theoretical delivery of tank outlet melting salt pump A
B) theoretical delivery of melting salt pump ABy maximum stream flowAnd minimum dischargeSalt pump A is formed after amplitude limit
Actual control flowI.e.
C) it is when the cold tank outlet melting salt pump A flows reach minimum discharge limit valueAnd Thot＜ Thot_e
When, stop the outlet of the first heat collecting field and fuse salt is delivered to by electricity generation system entrance by the first pipeline, start the outlet of the second heat collecting field
Fuse salt is delivered to by the described second cold tank entrance by second pipe, the fuse salt for forming the cold tank of cold tank --- heat collecting field --- is returned
Road；
When the cold tank outlet melting salt pump A flows are more than minimum discharge limit valueOr heat collecting field outlet
Temperature is more than or equal to rated temperature Thot≥Thot_eWhen, start the first heat collecting field outlet and sent fuse salt by the first pipeline
To the electricity generation system entrance, electricity generation system outlet connects the first cold tank entrance by pipeline, stops second heat collecting field and goes out
Fuse salt is delivered to the second cold tank entrance by mouth by second pipe, forms cold tank --- heat collecting field --- electricity generation system --- cold tank
Fuse salt loop.
The heat collecting field defocuses regulation unit and carries out defocusing concretely comprising the following steps for regulation：
A) define heat collecting field defocusing coefficient k (0≤k≤1) represent heat collecting field defocus after absorb solar energy with defocus preceding reason
By the ratio between solar energy that can above absorb；K=1 indicates that k=0 represented and defocus completely without defocusing, and the dispersion of the expressed portions of 0 ＜ k ＜ 1 is burnt；
After defocusing coefficient k is issued heat collecting field controller by plant controller, heat collecting field controller is by adjusting the orientation of heat collector
Realization is defocused；Plant controller is with heat collecting field defocusing coefficient k as control targe.
B) when the theoretical delivery of the cold tank outlet melting salt pump AWhen, defocus regulation flow errorWhenWhen defocus regulation flow error
C) calculated according to equation below and defocus adjustment factor：
Embodiment 4
This kind of light field flow rate of molten salt of slot type light thermo-power station as shown in Figure 1 with defocus regulation cooperative control device, its is main
Architectural feature is：Solar-thermal generating system is made up of cold tank, heat collecting field and electricity generation system.The light field fused salt of slot type light thermo-power station
Flow with defocus regulation cooperative control device by heat collecting field Flow-rate adjustment control unit, heat collecting field defocus regulation unit and
Central co-ordination control unit is constituted.
The light field flow rate of molten salt of the slot type light thermo-power station is characterised by with regulation cooperative control device is defocused：
The cold tank outlet is connected to heat collecting field entrance by the 3rd pipeline, and the cold tank outlet is provided with melting salt pump A；
The first heat collecting field outlet is connected to the electricity generation system entrance by the first pipeline, and the electricity generation system outlet is by the 4th pipe
Road is connected to the described first cold tank entrance, and the second heat collecting field outlet is connected to the described second cold tank entrance by second pipe.
The light field flow rate of molten salt of slot type light thermo-power station is controlled with regulation cooperative control device is defocused by heat collecting field Flow-rate adjustment
Unit, heat collecting field defocus regulation unit and Central co-ordination control unit composition.The heat collecting field Flow-rate adjustment control is single
It is first to defocus regulation unit by communication network with the heat collecting field, it is connected with the Central co-ordination control unit respectively.Institute
State heat collecting field Flow-rate adjustment control unit and the flow control that cold tank is exported is completed according to the instruction of the Central co-ordination control unit.
The regulation unit that defocuses defocuses control according to the instruction completion heat collecting field of the Central co-ordination control unit.In described
Fuse salt flow path of the control unit according to the feedback control heat collecting field of the heat collecting field Flow-rate adjustment control unit is coordinated in centre,
The internal regulation state of heat collecting field Flow-rate adjustment control unit is sent to simultaneously described defocuses regulation unit.
The principle of flow regulator is during heat collecting field Flow-rate adjustment is coordinated to control as shown in Figure 3：
It is T to set heat collecting field outlet fuse salt rated temperaturehot_e, according to molten salt characteristics setting melting salt pump maximum stream flow
ForAnd minimum discharge
A) with heat collecting field outlet fuse salt temperature ThotIt is control targe, with the cold tank outlet melting salt pump A flows
It is controlled quentity controlled variable.Work as Thot＜ Thot_eWhen, with Δ Tcontrl=Thot_e-ThotIt is the cold tank outlet melting salt pump A flowsRegulation
Foundation, adoption rate integration control is gradually reduced the theoretical delivery of the cold tank outlet melting salt pump AWork as Thot＞ Thot_e
When, with Δ Tcontrl=Thot-Thot_eIt is the cold tank outlet melting salt pump A flowsRegulation foundation, gradually increases described cold
The theoretical delivery of tank outlet melting salt pump A
B) theoretical delivery of melting salt pump ABy maximum stream flowAnd minimum dischargeSalt pump A is formed after amplitude limit
Actual control flowI.e.
Embodiment heat collecting field Flow-rate adjustment as shown in Figure 4 coordinates to control the medium-small flow loop switch logical flow chart be：
A) it is when the cold tank outlet melting salt pump A flows reach minimum discharge limit valueAnd Thot＜ Thot_e
When, stop first heat collecting field outlet and fuse salt is delivered to by the electricity generation system entrance by the first pipeline, startup described the
Fuse salt is delivered to the described second cold tank entrance by the outlet of two heat collecting fields by second pipe, forms cold tank --- heat collecting field --- cold
The fuse salt loop of tank.
B) when the cold tank outlet melting salt pump A flows are more than minimum discharge limit valueOr heat collecting field goes out
Mouth temperature is more than or equal to rated temperature Thot≥Thot_eWhen, start the first heat collecting field outlet and pass through the first pipeline by fuse salt
The electricity generation system entrance is delivered to, fuse salt is delivered to the second cold tank and entered by stopping the second heat collecting field outlet by second pipe
Mouthful, form cold tank --- the fuse salt loop of heat collecting field --- electricity generation system --- cold tank.
If Fig. 5 is to defocus regulation coordination control principle drawing using embodiments of the invention to be：
A) define heat collecting field defocusing coefficient k (0≤k≤1) represent heat collecting field defocus after absorb solar energy with defocus preceding reason
By the ratio between solar energy that can above absorb.K=1 indicates that k=0 represented and defocus completely without defocusing, and the dispersion of the expressed portions of 0 ＜ k ＜ 1 is burnt.
After defocusing coefficient k is issued heat collecting field controller by plant controller, heat collecting field controller is by adjusting the orientation of heat collector
Realization is defocused.Plant controller is with heat collecting field defocusing coefficient k as control targe.
B) when the theoretical delivery of the cold tank outlet melting salt pump AWhen, defocus regulation flow errorWhenWhen defocus regulation flow error
C) calculated according to equation below and defocus adjustment factor：
Such as Fig. 6 can be seen that this kind for the heat collecting field Flow-rate adjustment of slot type light thermo-power station and defocus regulation control method for coordinating
Comprehensive Control effect：
A) in the daytime when Intensity of the sunlight gradually rises, system is first-selected to export flow rate of molten salt maintenance collection by adjusting cold tank
Thermal field exports temperature of molten salt；When Flow-rate adjustment reaches the upper limit, and intensity of illumination, still when increasing, heat collecting field defocuses startup
Regulation, by introducing the regulation of defocusing coefficient K, reduces the solar radiation that heat collecting field absorbs, and maintains its outlet temperature of molten salt；
B) when Intensity of the sunlight gradually weakens, defocusing coefficient K progressively recovers to 1, and system is defeated by adjusting cold tank again
Go out flow rate of molten salt and maintain heat collecting field outlet temperature of molten salt；When Flow-rate adjustment reaches lower limit, and intensity of illumination is still when reducing,
System will start low discharge circulation, and heat collecting field output fused salt will not enter hot tank, and form the cold tank of cold tank --- heat collecting field ---
Fuse salt loop；
C) when reentering in the daytime, system low discharge circulant solution is removed, and recovers tank --- heat collecting field --- generating system
System --- the fuse salt loop of cold tank.
Claims (2)
1. the light field flow rate of molten salt of slot type light thermo-power station with defocus regulation cooperative control device, it is characterised in that：Including heat collecting field
Flow-rate adjustment control unit, heat collecting field defocus regulation unit and Central co-ordination control unit, the heat collecting field Flow-rate adjustment
Control unit defocuses regulation unit by communication network with the heat collecting field, and Unit two are controlled with the Central co-ordination respectively
Unit is connected；The heat collecting field Flow-rate adjustment control unit completes cold tank outlet according to the instruction of the Central co-ordination control unit
Flow control, it is described defocus regulation unit heat collecting field completed according to the instruction of the Central co-ordination control unit defocusing
Control, melting of the Central co-ordination control unit according to the feedback control heat collecting field of the heat collecting field Flow-rate adjustment control unit
Salt flow path, while the internal regulation state of heat collecting field Flow-rate adjustment control unit is sent into described defocusing adjusts control list
Unit；
The Central co-ordination control unit is specified to heat collecting field Flow-rate adjustment control unit setting heat collecting field outlet fuse salt
Temperature is Thot_e, according to molten salt characteristics set melting salt pump maximum stream flow asAnd minimum discharge
When flow regulating function is not reaching to the upper limit, i.e., flow is not reaching to maximum stream flowWhen, the Central co-ordination control
Unit does not start the heat collecting field and defocuses regulation unit to carry out defocusing regulation, only starts the heat collecting field Flow-rate adjustment control
Unit carries out Flow-rate adjustment, control heat collecting field outlet fuse salt temperature Thot；
When Flow-rate adjustment reaches the upper limit, and intensity of illumination, still when increasing, the Central co-ordination control unit will start institute
Stating heat collecting field and defocusing regulation unit defocus regulation, reduces the solar radiation that heat collecting field absorbs, and maintains its outlet fused salt
Temperature；
The heat collecting field Flow-rate adjustment control unit carries out concretely comprising the following steps for the Flow-rate adjustment：
A) with heat collecting field outlet fuse salt temperature ThotIt is control targe, salt pump A flows is melted with the outlet of the cold tankFor
Controlled quentity controlled variable；Work as Thot＜ Thot_eWhen, with Δ Tcontrl=Thot_e-ThotFor the outlet of the cold tank melts salt pump A flowsRegulation
Foundation, adoption rate integration control is gradually reduced the theoretical delivery of the outlet melting salt pump A of the cold tankWork as Thot＞
Thot_eWhen, with Δ Tcontrl=Thot-Thot_eFor the outlet of the cold tank melts salt pump A flowsRegulation foundation, gradually increases
The theoretical delivery of the outlet melting salt pump A of the cold tank
B) theoretical delivery of melting salt pump ABy maximum stream flowAnd minimum dischargeThe reality of salt pump A is formed after amplitude limit
Border controls flowI.e.
C) it is when the outlet melting salt pump A flows of the cold tank reach minimum discharge limit valueAnd Thot＜ Thot_eWhen,
Stop the outlet of the first heat collecting field and fuse salt is delivered to by electricity generation system entrance by the first pipeline, start the outlet of the second heat collecting field and pass through
Fuse salt is delivered to the second cold tank entrance by second pipe, forms the fuse salt loop of the cold tank of cold tank --- heat collecting field ---；
It is more than minimum discharge limit value when the outlet of the cold tank melts salt pump A flowsOr heat collecting field outlet temperature
More than or equal to rated temperature Thot≥Thot_eWhen, start the first heat collecting field outlet and fuse salt is delivered to by hair by the first pipeline
Electric system entrance, electricity generation system outlet connects the first cold tank entrance by pipeline, stops second heat collecting field outlet and passes through the
Fuse salt is delivered to the described second cold tank entrance by two pipelines, forms cold tank --- heat collecting field --- electricity generation system --- cold tank it is molten
Melt salt loop.
2. the light field flow rate of molten salt of slot type light thermo-power station according to claim 1 with defocus regulation cooperative control device, its
It is characterised by：The heat collecting field defocuses regulation unit and carries out defocusing concretely comprising the following steps for regulation：
A) define heat collecting field defocusing coefficient k, 0≤k≤1, represent heat collecting field defocus after absorb solar energy with defocus before in theory
The ratio between solar energy that can be absorbed；K=1 indicates that k=0 represented and defocus completely without defocusing, and the dispersion of the expressed portions of 0 ＜ k ＜ 1 is burnt；Power station
After defocusing coefficient k is issued heat collecting field controller by controller, heat collecting field controller is capable of achieving by adjusting the orientation of heat collector
Defocus；Plant controller is with heat collecting field defocusing coefficient k as control targe；
B) when the outlet of the cold tank melts the theoretical delivery of salt pump AWhen, defocus regulation flow errorWhenWhen defocus regulation flow error
C) calculated according to equation below and defocus adjustment factor：
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| CN109237827A (en) * | 2017-05-26 | 2019-01-18 | 天津滨海光热技术研究院有限公司 | A kind of slot type molten salt thermal power station heat collecting field operating system and operation method |
| CN109442770A (en) * | 2017-08-31 | 2019-03-08 | 甘肃光热发电有限公司 | A kind of control method improving collecting system collecting efficiency |
| CN108518879A (en) * | 2018-04-09 | 2018-09-11 | 山西炅奇新能源科技有限公司 | A kind of focusing solar tracking control system, method and hot water preparation system |
| CN109520159A (en) * | 2018-10-16 | 2019-03-26 | 北京拉夫堡太阳能技术有限公司 | A kind of temprature control method and system of solar energy heat collection pipe |
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