CN108347063A - A kind of ship grid-connected photovoltaic system based on super capacitor energy-storage - Google Patents
A kind of ship grid-connected photovoltaic system based on super capacitor energy-storage Download PDFInfo
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- CN108347063A CN108347063A CN201810044693.2A CN201810044693A CN108347063A CN 108347063 A CN108347063 A CN 108347063A CN 201810044693 A CN201810044693 A CN 201810044693A CN 108347063 A CN108347063 A CN 108347063A
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- 239000003990 capacitor Substances 0.000 title claims abstract description 53
- 238000004146 energy storage Methods 0.000 title claims abstract description 26
- 230000035772 mutation Effects 0.000 claims abstract description 35
- 238000011217 control strategy Methods 0.000 claims abstract description 25
- 230000008901 benefit Effects 0.000 claims abstract description 4
- 230000009467 reduction Effects 0.000 claims abstract description 4
- 230000005611 electricity Effects 0.000 claims description 4
- 238000010248 power generation Methods 0.000 claims description 3
- 238000005516 engineering process Methods 0.000 description 3
- ATUOYWHBWRKTHZ-UHFFFAOYSA-N Propane Chemical compound CCC ATUOYWHBWRKTHZ-UHFFFAOYSA-N 0.000 description 2
- 230000009471 action Effects 0.000 description 2
- 238000013461 design Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- WHXSMMKQMYFTQS-UHFFFAOYSA-N Lithium Chemical compound [Li] WHXSMMKQMYFTQS-UHFFFAOYSA-N 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000015556 catabolic process Effects 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 238000005553 drilling Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 238000003912 environmental pollution Methods 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 229910052731 fluorine Inorganic materials 0.000 description 1
- 239000011737 fluorine Substances 0.000 description 1
- 239000000446 fuel Substances 0.000 description 1
- PCHJSUWPFVWCPO-UHFFFAOYSA-N gold Chemical compound [Au] PCHJSUWPFVWCPO-UHFFFAOYSA-N 0.000 description 1
- 239000010931 gold Substances 0.000 description 1
- 229910052737 gold Inorganic materials 0.000 description 1
- 229910052744 lithium Inorganic materials 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 238000013178 mathematical model Methods 0.000 description 1
- 230000035800 maturation Effects 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 239000001294 propane Substances 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
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- 230000004044 response Effects 0.000 description 1
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Classifications
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- H02J3/383—
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J3/00—Circuit arrangements for ac mains or ac distribution networks
- H02J3/24—Arrangements for preventing or reducing oscillations of power in networks
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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
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E10/00—Energy generation through renewable energy sources
- Y02E10/50—Photovoltaic [PV] energy
- Y02E10/56—Power conversion systems, e.g. maximum power point trackers
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Supply And Distribution Of Alternating Current (AREA)
- Charge And Discharge Circuits For Batteries Or The Like (AREA)
Abstract
The present invention provides a kind of ship grid-connected photovoltaic system based on super capacitor energy-storage, smooth power controller is according to the proportional relation of photovoltaic output power and terminal voltage, by the voltage for acquiring DC bus, the power switch of IGBT in the corresponding two-way DC/DC rectifiers of the first super capacitor is controlled through the constant voltage Closed-loop Control Strategy containing power feedforward component, so that the first super capacitor group is compensated photovoltaic high-frequency fluctuation, realizes smooth photovoltaic output power curve purpose；When the instantaneous mutation amount of the output power of DC/AC inverters is more than setting value, mutation compensation controller uses the corresponding two-way DC/DC rectifiers of the second super capacitor group of power limitation control policy control, the second super capacitor group is set to be compensated with firm power, the reference power value of power limitation control strategy is taken advantage of a situation increase or reduction with setting ladder amount, it realizes and converts the instantaneous macromutation amount of grid-connected power to several staged micromutation amounts, reduce the impact to network of ship.
Description
Technical field
The invention belongs to ship application of solar, and in particular to a kind of ship light based on super capacitor energy-storage
Photovoltaic grid-connected system.
Background technology
It is increasingly serious with marine environmental pollution problem, start to make using photovoltaic power generation apparatus on more and more ships
For the substitute electric power of diesel generating set, the fuel consumption of diesel-driven generator is reduced.But due to the interval of photovoltaic generating system
Property, output power is affected by environmental factor, shows output-power fluctuation frequently with the characteristic of high-power mutation, give
Network of ship brings larger current to impact risk.And in practical applications, it often matches the energy-storage system of large capacity and combines rationally
Control strategy come the high-frequency fluctuation for compensating photovoltaic and high-power mutation, the energy-storage system of large capacity is that accumulator or flywheel store up
Energy.
So far, ship photovoltaic generating system compensates the high frequency waves of photovoltaic to match large-capacity battery energy-storage system
Dynamic and high-power mutation, but since the response speed of accumulator itself is slow, therefore mostly use the grid-connected control of photovoltaic perpetual motion rate
Strategy, then the matching capacity requirement of accumulator is very huge.Such as 2016, China is in " in far soar " wheel roll-on/roll-off vessel for vehicle
The 143kW of upper integrated photovoltaic simultaneously/off-network mixed power supply system, system matches 652.8kWh lithium battery energy storage battery systems are total
Weight considers ventilating problem, needs at least 30m up to 6 tons2Mounting area.Furthermore the energy-storage system of accumulator safety of large capacity
Maintenance cost is very huge, and rate of breakdown is higher, and must match independent Fire-extinguishing System of Septenary-Fluorine Propane.Therefore, it causes
Energy-storage system of accumulator accounts for 34% or more situation of the totle drilling cost that generation of electricity by new energy device is integrated in Ship Electrical Power System, seriously
Constrain application prospect of the new energy on ship.
Invention content
The technical problem to be solved by the present invention is to：A kind of ship parallel network power generation system based on super capacitor energy-storage is provided
System can provide a better solution to reduce the intermittence of photovoltaic generating system to the impact of network of ship.
The technical solution taken by the invention to solve the above technical problem is：A kind of ship based on super capacitor energy-storage
Grid-connected photovoltaic system, including photovoltaic battery panel, photovoltaic DC/DC rectifiers and energy-storage system, photovoltaic battery panel is through photovoltaic DC/
DC rectifiers access DC bus, and energy-storage system accesses DC bus by two-way DC/DC rectifiers, it is characterised in that：This hair
Electric system further includes smooth power controller, mutation compensation controller, DC/AC inverters and voltage sensor and current sense
Device；The energy-storage system is 2 groups of super capacitors；DC bus is incorporated to Ship Power Station bus rod by DC/AC inverters；
The smooth power controller is used for the proportional relation according to photovoltaic output power and photovoltaic output end voltage,
By acquiring the voltage of DC bus, the first super capacitor is controlled through the constant voltage Closed-loop Control Strategy containing power feedforward component
The power switch of IGBT, makes the first super capacitor group compensate photovoltaic high-frequency fluctuation in corresponding two-way DC/DC rectifiers,
Realize smooth photovoltaic output power curve purpose；
The mutation compensation controller and the second super capacitor group is standby in normal conditions；
The mutation compensation controller, the instantaneous mutation amount for the output power when DC/AC inverters are more than setting
When value, using the corresponding two-way DC/DC rectifiers of the second super capacitor group of power limitation control policy control, make the second super capacitor
Group is compensated with firm power, and the reference power value of power limitation control strategy is taken advantage of a situation increase or reduction with setting ladder amount,
It realizes and converts the instantaneous macromutation amount of grid-connected power to several staged micromutation amounts, reduce the impact to network of ship.
By said program, the second super capacitor group SOC be 50% capacitance.
By said program, the capacity of first super capacitor group is according to photovoltaic maximum high frequency mutation compensation amount EscWith it is prominent
Become duration t calculating gained, formula is：Wherein P0、P1Respectively output power before photovoltaic mutation
Output power after being mutated with photovoltaic, t are the mutation duration；The capacity of second super capacitor group is according to the ladder Sudden Changing Rate of setting
Gained is calculated with entire grid-connected photovoltaic system installed capacity.
By said program, it is outer loop voltag control that the DC/AC inverters, which use Double-loop Control Strategy, Double-loop Control Strategy,
The control strategy of system, inner ring current control.
Beneficial effects of the present invention are：Using the different super capacitor group of 2 groups of functions, respectively in smooth power controller and
The high-frequency fluctuation of grid-connected photovoltaic system and high-power mutation are compensated under the action of mutation compensation controller, to drop
The low rush of current to network of ship.
Description of the drawings
Fig. 1 is the system framework figure of one embodiment of the invention.
Fig. 2 is the control strategy schematic diagram of smooth power controller.
Fig. 3 is the control strategy schematic diagram of mutation compensation controller.
Specific implementation mode
With reference to specific example and attached drawing, the present invention will be further described.
The present invention provides a kind of ship grid-connected photovoltaic system based on super capacitor energy-storage, as shown in Figure 1, including light
Solar panel, photovoltaic DC/DC rectifiers and energy-storage system are lied prostrate, photovoltaic battery panel accesses DC bus, storage through photovoltaic DC/DC rectifiers
Energy system accesses DC bus Bus2 by two-way DC/DC rectifiers, this electricity generation system further includes smooth power controller, mutation
Compensating controller, DC/AC inverters and voltage sensor and current sensor；The energy-storage system is 2 groups of super capacitors；
DC bus is incorporated to Ship Power Station bus rod Bus3 by DC/AC inverters；Bus 1 be marine diesel generator and vehicle
Screen, Bus4 are that external marine electrical equipment load is shielded in load, are connected by interconnection switch between Bus1, Bus4 and Bus3.
As shown in Fig. 2, the smooth power controller, for according to photovoltaic output power PPVWith photovoltaic output end voltage
VOThe proportional relation P of (with DC bus-bar voltage equivalence)PV=α VO, α is slope factor (being measured by experiment), by acquiring direct current
It is corresponding double to control the first super capacitor through the constant voltage Closed-loop Control Strategy containing power feedforward component for the voltage of busbar Bus2
The power switch of IGBT into DC/DC rectifiers, makes the first super capacitor group compensate photovoltaic high-frequency fluctuation, realizes smooth
Photovoltaic output power curve purpose.Specifically, the voltage signal of smooth power controller acquisition DC bus Bus2 is through constant voltage
Control strategy generates control electric current, the output of control electric current and feedforward current and the first super capacitor group in power feedforward control
Exchange carries out addition, and the current signal after addition generates IGBT switching signals through PWM links and acts on the first super capacitor group
Two-way DC/DC rectifiers realize that the first super capacitor group compensates the high-frequency fluctuation of grid-connected photovoltaic system.(the perseverance
Voltage control strategy is substantially the DC/DC control strategies that outer shroud current inner loop is done with voltage control, in super capacitor/wind turbine
It is applied in hybrid power system, such as in Li Xiao, Hu Changsheng, wind powers of the Liu Chang gold based on super capacitor energy-storage
Regulating system models and control [J] Automation of Electric Systems .2009,33 (9):86-89.)
The mutation compensation controller and the second super capacitor group is standby in normal conditions.
As shown in figure 3, the mutation compensation controller, the instantaneous mutation for the output power when DC/AC inverters
When amount is more than setting value, using the corresponding two-way DC/DC rectifiers of the second super capacitor group of power limitation control policy control, make the
Two super capacitor groups are compensated with firm power, and the reference power value of power limitation control strategy is taken advantage of a situation increase with setting ladder amount
Or reduce, it realizes and converts the instantaneous macromutation amount of grid-connected power to several staged micromutation amounts, reduce to ship electricity
The impact of net.Specifically, the output power of mutation compensation controller acquisition DC/AC inverters, work(is acquired through delayer, comparator
Rate momentary fluctuation value starts step function if momentary fluctuation value is more than the ladder power of setting, reference power is calculated, through perseverance
Power control strategy, PWM generate IGBT switching signals and act on the two-way DC/DC rectifiers of the second super capacitor group, realize the
Two super capacitor groups are converted into small-power ladder Sudden Changing Rate to high-power instantaneous mutation amount；If momentary fluctuation value is no more than setting
Ladder power, then the second super capacitor group keep armed state.(the power limitation control strategy is substantially with power ring
For the DC/DC control strategies that outer shroud electric current loop is inner ring, belong to technology maturation algorithm in industry, concrete mathematical model can refer to
Paper Yanchao Qiu, Chengqing Yuan, Yuwei Sun.Review on the application and
research progress of photovoltaics-ship power system.The 3rd International
Conference on Transportation Information and Safety.2015.)
It is 50% capacitance that second super capacitor group should keep SOC when standby.
In design, the capacity of first super capacitor group is according to photovoltaic maximum high frequency mutation compensation amount EscAnd mutation
Duration t calculates gained, and formula is：Wherein P0、P1Respectively photovoltaic mutation before output power and
Output power after mutation, t are the mutation duration；The capacity of second super capacitor group is according to the ladder Sudden Changing Rate of setting and entire
Grid-connected photovoltaic system installed capacity calculates gained.
It is the control of outer loop voltag, interior circular current that the DC/AC inverters, which use Double-loop Control Strategy, Double-loop Control Strategy,
The control strategy of control.
The present invention substitutes power back-off element of the accumulator as system, and 2 groups of super capacitors point using super capacitor
Not under the action of smooth power controller and mutation compensation controller to the high-frequency fluctuation of photovoltaic system and it is high-power be mutated into
Row compensation, reduces the intermittent impact to network of ship of photovoltaic generating system, and can effectively reduce construction cost, improves
The security reliability and economy of whole system.The present invention improves the security reliability of whole system, be new energy in ship
Application on oceangoing ship provides a kind of safe and reliable mode, is conducive to vigorously implementing for the work of ship energy saving emission reduction.
Above example is merely to illustrate the design philosophy and feature of the present invention, and its object is to make technology in the art
Personnel can understand the content of the present invention and implement it accordingly, and protection scope of the present invention is not limited to the above embodiments.So it is all according to
According to equivalent variations or modification made by disclosed principle, mentality of designing, within protection scope of the present invention.
Claims (4)
1. a kind of ship grid-connected photovoltaic system based on super capacitor energy-storage, including photovoltaic battery panel, photovoltaic DC/DC rectifications
Device and energy-storage system, photovoltaic battery panel access DC bus through photovoltaic DC/DC rectifiers, and energy-storage system is whole by two-way DC/DC
It flows device and accesses DC bus, it is characterised in that：This electricity generation system further includes smooth power controller, mutation compensation controller, DC/
AC inverters and voltage sensor and current sensor；The energy-storage system is 2 groups of super capacitors；DC bus passes through
DC/AC inverters are incorporated to Ship Power Station bus rod；
The smooth power controller passes through for the proportional relation according to photovoltaic output power and photovoltaic output end voltage
The voltage for acquiring DC bus controls the first super capacitor through the constant voltage Closed-loop Control Strategy containing power feedforward component and corresponds to
Two-way DC/DC rectifiers in IGBT power switch, so that the first super capacitor group is compensated photovoltaic high-frequency fluctuation, realize
Smooth photovoltaic output power curve purpose；
The mutation compensation controller and the second super capacitor group is standby in normal conditions；
The mutation compensation controller is used for when the instantaneous mutation amount of the output power of DC/AC inverters is more than setting value,
Using the corresponding two-way DC/DC rectifiers of the second super capacitor group of power limitation control policy control, make the second super capacitor group with
Firm power compensates, and the reference power value of power limitation control strategy is taken advantage of a situation increase or reduction with setting ladder amount, is realized
It converts the instantaneous macromutation amount of grid-connected power to several staged micromutation amounts, reduces the impact to network of ship.
2. the ship grid-connected photovoltaic system according to claim 1 based on super capacitor energy-storage, it is characterised in that：Institute
The capacitance that the second super capacitor group SOC stated is 50%.
3. the ship grid-connected photovoltaic system according to claim 1 based on super capacitor energy-storage, it is characterised in that：Institute
The capacity for the first super capacitor group stated is according to photovoltaic maximum high frequency mutation compensation amount EscGained is calculated with mutation duration t,
Its formula is：Wherein P0、P1Output work after respectively output power and photovoltaic are mutated before photovoltaic mutation
Rate, t are the mutation duration；Ladder Sudden Changing Rate and entire parallel network power generation of the capacity of second super capacitor group according to setting
System installed capacity calculates gained.
4. the ship grid-connected photovoltaic system according to claim 1 based on super capacitor energy-storage, it is characterised in that：Institute
It is the control of outer loop voltag, the control of inner ring current control that the DC/AC inverters stated, which use Double-loop Control Strategy, Double-loop Control Strategy,
Strategy.
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| CN201810044693.2A CN108347063B (en) | 2018-01-17 | 2018-01-17 | Ship photovoltaic grid-connected power generation system based on super capacitor energy storage |
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| CN108347063B CN108347063B (en) | 2021-08-24 |
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| CN110380439A (en) * | 2019-08-05 | 2019-10-25 | 武汉理工大学 | Grid-connected energy management apparatus peculiar to vessel based on super capacitor energy-storage |
| CN110768355A (en) * | 2019-11-29 | 2020-02-07 | 中船动力有限公司 | Direct-current networking wind-solar-diesel land-storage power station system and working method thereof |
| CN111064178A (en) * | 2018-10-16 | 2020-04-24 | 上海明华电力技术工程有限公司 | Self-discipline floating micro-grid system and control method thereof |
| CN112688353A (en) * | 2021-03-12 | 2021-04-20 | 澄瑞电力科技（上海）有限公司 | High-power direct current charging system |
| CN114094624A (en) * | 2021-11-17 | 2022-02-25 | 天津大学 | Low-voltage ride through coordination control method for wave power generation system |
| CN114243732A (en) * | 2021-11-30 | 2022-03-25 | 中国船舶工业集团公司第七0八研究所 | Boats and ships main power grid electric energy quality control system based on ultracapacitor system |
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