CN107269454B - Power generation with marine energy system suitable for offshore platform frequency conversion drive trepan - Google Patents
Power generation with marine energy system suitable for offshore platform frequency conversion drive trepan Download PDFInfo
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- CN107269454B CN107269454B CN201710432317.6A CN201710432317A CN107269454B CN 107269454 B CN107269454 B CN 107269454B CN 201710432317 A CN201710432317 A CN 201710432317A CN 107269454 B CN107269454 B CN 107269454B
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- 238000010248 power generation Methods 0.000 title claims abstract description 52
- 241000425571 Trepanes Species 0.000 title claims abstract description 47
- 238000006243 chemical reaction Methods 0.000 title claims abstract description 19
- 230000005611 electricity Effects 0.000 claims abstract description 45
- 238000004146 energy storage Methods 0.000 claims abstract description 20
- 238000000034 method Methods 0.000 claims description 20
- 238000005553 drilling Methods 0.000 claims description 12
- 238000007665 sagging Methods 0.000 claims description 10
- 230000007257 malfunction Effects 0.000 claims description 3
- 230000000994 depressogenic effect Effects 0.000 claims description 2
- 239000000446 fuel Substances 0.000 abstract description 3
- 230000007774 longterm Effects 0.000 abstract description 2
- 239000013589 supplement Substances 0.000 abstract description 2
- 238000005516 engineering process Methods 0.000 description 5
- 239000000203 mixture Substances 0.000 description 3
- 238000011217 control strategy Methods 0.000 description 2
- 230000003247 decreasing effect Effects 0.000 description 2
- 238000007599 discharging Methods 0.000 description 2
- 239000007789 gas Substances 0.000 description 2
- 240000002853 Nelumbo nucifera Species 0.000 description 1
- 235000006508 Nelumbo nucifera Nutrition 0.000 description 1
- 235000006510 Nelumbo pentapetala Nutrition 0.000 description 1
- 241001074085 Scophthalmus aquosus Species 0.000 description 1
- 238000010521 absorption reaction Methods 0.000 description 1
- 230000015556 catabolic process Effects 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 238000006731 degradation reaction Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 239000002803 fossil fuel Substances 0.000 description 1
- 239000000295 fuel oil Substances 0.000 description 1
- 238000002347 injection Methods 0.000 description 1
- 239000007924 injection Substances 0.000 description 1
- 230000001473 noxious effect Effects 0.000 description 1
- 239000003921 oil Substances 0.000 description 1
- 230000000505 pernicious effect Effects 0.000 description 1
- 230000006641 stabilisation Effects 0.000 description 1
- 238000011105 stabilization Methods 0.000 description 1
- 239000004575 stone Substances 0.000 description 1
- 230000009466 transformation Effects 0.000 description 1
Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F03—MACHINES OR ENGINES FOR LIQUIDS; WIND, SPRING, OR WEIGHT MOTORS; PRODUCING MECHANICAL POWER OR A REACTIVE PROPULSIVE THRUST, NOT OTHERWISE PROVIDED FOR
- F03B—MACHINES OR ENGINES FOR LIQUIDS
- F03B13/00—Adaptations of machines or engines for special use; Combinations of machines or engines with driving or driven apparatus; Power stations or aggregates
- F03B13/12—Adaptations of machines or engines for special use; Combinations of machines or engines with driving or driven apparatus; Power stations or aggregates characterised by using wave or tide energy
- F03B13/14—Adaptations of machines or engines for special use; Combinations of machines or engines with driving or driven apparatus; Power stations or aggregates characterised by using wave or tide energy using wave energy
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F03—MACHINES OR ENGINES FOR LIQUIDS; WIND, SPRING, OR WEIGHT MOTORS; PRODUCING MECHANICAL POWER OR A REACTIVE PROPULSIVE THRUST, NOT OTHERWISE PROVIDED FOR
- F03B—MACHINES OR ENGINES FOR LIQUIDS
- F03B13/00—Adaptations of machines or engines for special use; Combinations of machines or engines with driving or driven apparatus; Power stations or aggregates
- F03B13/12—Adaptations of machines or engines for special use; Combinations of machines or engines with driving or driven apparatus; Power stations or aggregates characterised by using wave or tide energy
- F03B13/26—Adaptations of machines or engines for special use; Combinations of machines or engines with driving or driven apparatus; Power stations or aggregates characterised by using wave or tide energy using tide energy
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F03—MACHINES OR ENGINES FOR LIQUIDS; WIND, SPRING, OR WEIGHT MOTORS; PRODUCING MECHANICAL POWER OR A REACTIVE PROPULSIVE THRUST, NOT OTHERWISE PROVIDED FOR
- F03B—MACHINES OR ENGINES FOR LIQUIDS
- F03B15/00—Controlling
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F03—MACHINES OR ENGINES FOR LIQUIDS; WIND, SPRING, OR WEIGHT MOTORS; PRODUCING MECHANICAL POWER OR A REACTIVE PROPULSIVE THRUST, NOT OTHERWISE PROVIDED FOR
- F03D—WIND MOTORS
- F03D7/00—Controlling wind motors
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F03—MACHINES OR ENGINES FOR LIQUIDS; WIND, SPRING, OR WEIGHT MOTORS; PRODUCING MECHANICAL POWER OR A REACTIVE PROPULSIVE THRUST, NOT OTHERWISE PROVIDED FOR
- F03D—WIND MOTORS
- F03D9/00—Adaptations of wind motors for special use; Combinations of wind motors with apparatus driven thereby; Wind motors specially adapted for installation in particular locations
- F03D9/10—Combinations of wind motors with apparatus storing energy
- F03D9/11—Combinations of wind motors with apparatus storing energy storing electrical energy
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F03—MACHINES OR ENGINES FOR LIQUIDS; WIND, SPRING, OR WEIGHT MOTORS; PRODUCING MECHANICAL POWER OR A REACTIVE PROPULSIVE THRUST, NOT OTHERWISE PROVIDED FOR
- F03D—WIND MOTORS
- F03D9/00—Adaptations of wind motors for special use; Combinations of wind motors with apparatus driven thereby; Wind motors specially adapted for installation in particular locations
- F03D9/20—Wind motors characterised by the driven apparatus
- F03D9/25—Wind motors characterised by the driven apparatus the apparatus being an electrical generator
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- H02J3/382—
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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
- Y02E10/30—Energy from the sea, e.g. using wave energy or salinity gradient
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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
- Y02E10/70—Wind energy
- Y02E10/72—Wind turbines with rotation axis in wind direction
-
- 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
- Y02E10/70—Wind energy
- Y02E10/76—Power conversion electric or electronic aspects
-
- 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
- Y02E70/00—Other energy conversion or management systems reducing GHG emissions
- Y02E70/30—Systems combining energy storage with energy generation of non-fossil origin
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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Life Sciences & Earth Sciences (AREA)
- Sustainable Development (AREA)
- Sustainable Energy (AREA)
- Power Engineering (AREA)
- Oceanography (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Other Liquid Machine Or Engine Such As Wave Power Use (AREA)
- Supply And Distribution Of Alternating Current (AREA)
Abstract
The present invention utilizes solar energy, wind energy, marine tidal-current energy and a variety of ocean energies of wave energy, designs a kind of power generation with marine energy system suitable for ocean platform frequency conversion drive trepan.Different ocean energies have complementarity over time and space, thus the electricity generation system can provide continual and steady electric energy for the trepan of platform, and can maximally utilise ocean energy reduces fuel consumption.The power generation with marine energy system, can be with the network of ship parallel running steadily in the long term of ocean platform by grid-connected inverter.So dump energy can be fed to network of ship by grid-connected inverter by system when trepan consumption power is less than power generation with marine energy power；When trepan consumption power is greater than power generation with marine energy power, network of ship electric energy can be injected electricity generation system by grid-connected inverter by system, supplement the vacancy of generated output.In order to limit electricity generation system voltage fluctuation amplitude, system configuration energy-storage units utilize the power battery charge and discharge to improve voltage stability.
Description
Technical field
The present invention relates to regenerable marine energy generation technologies, especially a kind of to be suitable for offshore platform frequency conversion drive
The power generation with marine energy system of trepan.
Background technique
Ocean platform frequency conversion drive trepan is one of the important load of platform network of ship, by slush pump, winch, turntable
It is formed with numerous drilling equipments such as top drives, for completing offshore oil drilling operation.The diesel generating set of network of ship is to change
Stone fuel discharges a large amount of pernicious gas pollution of marine environment as the energy while issuing electric energy.International community is increasingly
Recognize, it is necessary to slow down the trend of environmental degradation by the effort in the whole world, this be human civilization sustainable development must be by
Road, therefore, renewable energy has been favored by people.Ocean platform operation at sea throughout the year, the surrounding presence at it are abundant
Renewable marine energy, such as wind energy, solar energy, marine tidal-current energy and wave energy, these energy may be used to generate electricity, for sea
Foreign platform frequency conversion drive trepan provides electric energy.Due to the variability and unstability of ocean energy, a certain single ocean energy is utilized
Electric energy is provided, not can guarantee the stability of power supply.
Summary of the invention
The present invention utilizes solar energy, wind energy, marine tidal-current energy and a variety of ocean energies of wave energy, and it is flat to design a kind of applicable Yu Haiyang
The power generation with marine energy system of platform frequency conversion drive trepan.Different ocean energies have complementarity, thus the hair over time and space
Electric system can provide continual and steady electric energy for the trepan of platform, can maximally utilise ocean energy reduction fuel oil and disappear
Consumption.The power generation with marine energy system, can be with the network of ship parallel running steadily in the long term of ocean platform by grid-connected inverter.
So system can be presented dump energy by grid-connected inverter when trepan consumption power is less than power generation with marine energy power
It send to network of ship；When trepan consumption power is greater than power generation with marine energy power, system can be by grid-connected inverter by ship
Oceangoing ship power grid electric energy injects electricity generation system, supplements the vacancy of generated output.In order to limit electricity generation system voltage fluctuation amplitude, system is matched
Energy-storage units have been set, have improved voltage stability using power battery charge and discharge.
There are problems that consumption of fossil fuels and discharge of noxious gases ocean platform diesel generating set, in conjunction with ocean
The status of platform surrounding renewable marine energy abundant, the present invention devise a kind of sea of ocean platform frequency conversion drive trepan
Foreign energy electricity generation system.The electricity generation system is by solar energy power generating, wind-power electricity generation, tidal power generating, wave-energy power generation and power
Battery energy storage device composition, and by grid-connected two-way inverter and isolating transformer, it is long with the network of ship of ocean platform
Phase steadily parallel running.The electricity generation system utilizes the complementarity on a variety of marine energy space-times, can largely be
Trepan load provides the electric energy of continuous-stable.It, can be with when the electric energy of generator unit output is greater than trepan loading demand
Extra electrical energy transportation to network of ship is reduced into diesel generating set by grid-connected two-way inverter and isolating transformer
Fuel consumption；When the electric energy of generator unit output is less than trepan loading demand, grid-connected two-way inverse transformation can be passed through
Device and isolating transformer are flowed, injects electric energy vacancy from network of ship to electricity generation system, it is ensured that trepan load operates normally.Cause
This, which can make full use of a variety of oceans to be able to achieve energy-saving and emission-reduction and ensure the continuous of trepan load supplying
Property, stability and reliability.
Technical scheme is as follows: a kind of power generation with marine energy system suitable for ocean platform frequency conversion drive trepan
System, including generator unit, energy-storage units and net unit, load unit, DC master row and controller.
Generator unit includes solar-energy photo-voltaic cell, photovoltaic cell DC/DC current transformer, wind-driven generator, wind-driven generator
AC/DC current transformer, marine tidal-current energy generator, marine tidal-current energy generator AC/DC current transformer, wave energy generator, wave energy generator AC/
DC current transformer composition.A variety of ocean energies are converted into electric energy by these generating equipments, are injected by power generation current transformer to DC master row
Direct current energy.Above 4 current transformers application PWM technology can both work in maximal power tracing (MPPT) mode, can also be with work
Make (CVD) mode of hanging down at constant pressure.
Energy-storage units include power battery and the two-way DC/DC current transformer of power battery.The two-way DC/DC current transformer of power battery
With charging, electric discharge and standby 3 kinds of operating statuses and constant pressure be sagging and 2 kinds of working methods of current limliting.It is disturbed in network of ship failure
Under dynamic or other specific run modes, energy-storage units utilize two-way DC/DC current transformer, by charge or discharge come stable DC mother
Voltage is arranged, to ensure power-balance and the stable operation of electricity generation system.When power battery charged state (SOC) exceeds bound model
When enclosing, power battery is prohibited charge and discharge, avoids the occurrence of and overcharges or over-discharge phenomenon.
And net unit includes grid-connected two-way AC/DC current transformer and isolating transformer, and DC master row is accessed network of ship, it is real
Show the parallel running of both power generation with marine energy system and network of ship.Grid-connected two-way AC/DC converter have inversion, rectification, to
3 kinds of operating statuses of machine and constant pressure is sagging and 2 kinds of working methods of current limliting.State is carried out according to system service requirement and mode is cut
It changes, controls the Power Exchange between electricity generation system and network of ship.When generator unit malfunction and failure, network of ship can be supplied independently
Electric trepan load.Therefore, grid-connected converter capacity meets trepan maximum load demand, and always holds much larger than generator unit
Amount, is generally operational in the sagging mode of constant pressure, is only in current-limiting mode in overload.
Load unit includes platform well drilling machine inverter and drilling well electric motor.They drive slush pumps, winch, turntable and
The equipment such as top drive.The number of devices of load unit is more, and operating condition changes greatly, power swing wider range.Electricity generation system utilizes
Generator unit, energy-storage units and network of ship provide continuous, stable electric energy for load unit.It nonserviceables output power
When insufficient, need to carry out load Control of decreasing load according to load priority, it is ensured that the power supply of the power-balance and important load of system
Quality.
Controller connects DC master row, controls the two-way DC/DC current transformer of power battery, photovoltaic according to the voltage of DC master row
Battery DC/DC current transformer, wind-driven generator AC/DC current transformer, marine tidal-current energy generator AC/DC current transformer, wave energy generator AC/
The operating status and working method of DC current transformer adjust the electric energy streams of each current transformer, promote power generation with marine energy efficiency, maintain direct current
Busbar voltage is steady.
Controller uses voltage hysteresis control method, and operational mode variable is arranged, and identifies electricity generation system present mode of operation；
DC master row voltage signal difference before and after operation of electric power system pattern switching is known as return difference；If DC master row voltage from it is low to
High variation, when DC master row voltage is greater than the sum of adjacent height mode switching point threshold value and half of return difference, the voltage of controller
The overturning of Hysteresis control module, electricity generation system control as adjacent height mode, and operational mode variable update is current high operational mode；
If DC master row voltage changes from high to low, when DC master row voltage is less than the one of adjacent low mode switching point threshold value and return difference
When half difference, the voltage hysteresis control module overturning of controller controls electricity generation system for adjacent low mode, operational mode variable
It is updated to current low operational mode.Voltage hysteresis control technology is used at switching point, it can frequently cutting to avoid operational mode
It changes, increases operation of electric power system reliability.
IfU dc For DC master row voltage, U dcn For DC master row voltage rating,U H2 、U H1 、U L1 、U L2 For different control models
The voltage threshold of switching point,U H2 =105%U dcn ,U H1 =102% U dcn ,U L1 =98% U dcn ,U L2 =95% U dcn .According to DC master row electricity
The variation of pressure, the power generation with marine energy system that controller allows the present invention to be suitable for ocean platform frequency conversion drive trepan work in strange land
5 kinds of different operational modes:
(1) operational mode 1:U dc ≤U L2
DC master row voltage is lower than the 95% of rated value, show the output powers of power generation with marine energy unit and energy-storage units without
Method meets the power demand of trepan load, and there are relatively high power vacancy.At this point, grid-connected two-way AC/DC current transformer work is in perseverance
The mode of hanging down is depressed, network of ship power is injected by DC master row by rectification, maintains electricity generation system energy balance, Constant Direct Current is female
Arrange voltage；Current transformer work is generated electricity in maximal power tracing MPPT mode, improves power generation with marine energy efficiency；Power battery is two-way
DC/DC current transformer works according to power electric power SOC value in current limliting discharge mode or standby mode.
(2) operational mode 2:U L2 <U dc ≤U L1
DC master row low voltage shows that the output power of power generation with marine energy unit is less than between the 95% ~ 98% of rated value
The power consumption of trepan load, there are a small amount of power shortages.At this point, energy-storage units put into operation, the two-way DC/DC of power battery
Current transformer work is hung down mode at constant pressure, by discharging power battery power, the power shortage of offset electricity generation unit, and play perseverance
Determine the effect of DC master row voltage；Current transformer work is generated electricity in maximal power tracing MPPT mode, electric energy is exported with peak efficiency；
And grid-connected two-way AC/DC current transformer is in standby and is not involved in energy exchange.
(3) operational mode 3:U L1 <U dc <U H1
DC master row voltage maintains near rated value, between the 98% ~ 102% of rated value, shows power generation with marine energy unit
Output power substantially meet trepan load power consumption.At this point, power generation current transformer work is in maximal power tracing MPPT
Mode；Grid-connected two-way AC/DC current transformer, which is in standby, is not involved in energy exchange；The two-way DC/DC current transformer work of power battery
Make to be not involved in energy exchange in standby mode, the minor fluctuations to avoid load consuming power and generator unit output power cause
The frequent charge and discharge of power battery.In this mode of operation, due to there is no an Isobarically Control link, DC master row voltage by load and
Ocean energy influence can be fluctuated in a small range of permission.
(4) operational mode 4:U H1 ≤U dc <U H2
DC master row voltage is higher, between the 102% ~ 105% of rated value, shows that the output power of power generation with marine energy unit omits
Greater than the power consumption of trepan load, it is remaining to there is a small amount of power.At this point, grid-connected two-way AC/DC current transformer is in standby shape
State is not involved in energy exchange；The two-way DC/DC current transformer work of power battery at constant pressure lead to power battery charging by vertical mode
Crossing absorption power reduces simultaneously stable DC busbar voltage；When power battery SOC charges to the limit, the two-way DC/DC of power battery becomes
Stream device is transferred to standby mode, and the current transformer that generates electricity switchs to the sagging mode of constant pressure by maximal power tracing MPPT working method, reduces
Output power maintains power-balance, Constant Direct Current busbar voltage.
(5) operational mode 5:U dc ≥U H2
DC master row voltage is higher than the 105% of rated value, shows the output power of power generation with marine energy unit much larger than trepan
There is a large amount of dump power in the power consumption of load.The mode at this point, grid-connected two-way AC/DC current transformer work is hung down at constant pressure,
DC master row dump power is injected into network of ship by inversion, maintains electricity generation system energy balance, Constant Direct Current busbar voltage；
The two-way DC/DC current transformer of power battery works according to power battery SOC value in charged state or standby mode；Generate electricity unsteady flow
Device work improves power generation with marine energy efficiency in maximal power tracing MPPT mode.
Detailed description of the invention
Fig. 1 is the structural schematic diagram for the power generation with marine energy system that the present invention is suitable for ocean platform frequency conversion drive trepan；
Fig. 2 is the operational mode signal for the power generation with marine energy system that the present invention is suitable for ocean platform frequency conversion drive trepan
Figure.
Appended drawing reference: 1: solar-energy photo-voltaic cell；2: wind-driven generator；3: marine tidal-current energy generator；4: wave energy generator；
5: power battery；6: isolating transformer；7: the two-way DC/DC current transformer of power battery；8: photovoltaic cell DC/DC current transformer；9: wind
It can generator AC/DC current transformer；10: marine tidal-current energy generator AC/DC current transformer；11: wave energy generator AC/DC current transformer；
12: grid-connected two-way AC/DC current transformer；13: controller；14: DC master row；15 --- trepan inverter；16 --- trepan
Motor.
Specific embodiment
1) power generation system structure principle
The present invention be suitable for ocean platform frequency conversion drive trepan power generation with marine energy system structure principle as shown in Figure 1,
Including generator unit, energy-storage units and six net unit, load unit, DC master row and controller parts.
(1) generator unit
Generator unit includes that solar-energy photo-voltaic cell 1 and photovoltaic cell DC/DC current transformer 8, wind-driven generator 2 and wind energy are sent out
Motor AC/DC current transformer 9, marine tidal-current energy generator 3 and marine tidal-current energy generator AC/DC current transformer 10, wave energy generator 4 and wave
It can generator AC/DC current transformer 11.A variety of ocean energies are converted into electric energy by these generating equipments, by power generation current transformer to system
DC master row 14 injects direct current energy.Above 4 current transformers application PWM technology, can both work in maximal power tracing
(MPPT) mode, can also work (CVD) mode of hanging down at constant pressure.
(2) energy-storage units
Energy-storage units are made of power battery 5 and the two-way DC/DC current transformer 7 of power battery.The two-way DC/DC of power battery becomes
Flow that device 7 has charging, electric discharge and standby 3 kinds of operating statuses and constant pressure is sagging and 2 kinds of working methods of current limliting.In network of ship
Under fault disturbance or other specific run modes, energy-storage units utilize the two-way DC/DC current transformer 7 of power battery, by charging or
Electric discharge carrys out the voltage of stable DC busbar 14, to ensure power-balance and the stable operation of electricity generation system.When the lotus of power battery 5
When electricity condition (SOC) exceeds upper and lower limits, power battery 5 is prohibited charge and discharge, avoids the occurrence of and overcharges or over-discharge phenomenon.
(3) and net unit
And net unit is made of grid-connected two-way AC/DC current transformer 12 and isolating transformer 6, and DC master row 14 is accessed ship
Power grid realizes the parallel running of both power generation with marine energy system and network of ship.Grid-connected two-way AC/DC converter 12 has inverse
Become, rectification, standby 3 kinds of operating statuses and constant pressure is sagging and 2 kinds of working methods of current limliting.Shape is carried out according to system service requirement
State and mode switch, and control the Power Exchange between electricity generation system and network of ship.When generator unit malfunction and failure, ship electricity
Net can independently-powered trepan load.Therefore, the capacity of grid-connected two-way AC/DC current transformer 12 meets trepan maximum load need
It asks, and is much larger than generator unit total capacity, be generally operational in the sagging mode of constant pressure, be only in current limliting side in overload
Formula.
(4) load unit
Load unit for the sake of simplicity, only draws 6 sets by platform well drilling machine inverter 15 and drilling well electric motor 16(in figure
Inverter and motor) composition, they drive the equipment such as slush pump, winch, turntable and top drive.The number of devices of load unit compared with
More, operating condition changes greatly, power swing wider range.Electricity generation system utilizes generator unit, energy-storage units and network of ship, is negative
Carrier unit provides continuous, stable electric energy.When output power deficiency of nonserviceabling, need to carry out load according to load priority
Control of decreasing load, it is ensured that the power-balance of system and the power supply quality of important load.
(5) controller
Controller 13 controls the two-way DC/DC current transformer 7 of power battery, photovoltaic cell DC/ according to the voltage of DC master row 14
DC current transformer 8, wind-driven generator AC/DC current transformer 9, marine tidal-current energy generator AC/DC current transformer 10, wave energy generator AC/DC
The operating status and working method of current transformer 11, grid-connected two-way AC/DC current transformer 12, adjust the electric energy streams of each current transformer, are promoted
Power generation with marine energy efficiency maintains the voltage of DC master row 14 steady.
Controller uses voltage hysteresis control method, and operational mode variable is arranged, and identifies electricity generation system present mode of operation；
DC master row voltage signal difference before and after operation of electric power system pattern switching is known as return difference；If DC master row voltage from it is low to
High variation, when DC master row voltage is greater than the sum of adjacent height mode switching point threshold value and half of return difference, the voltage of controller
The overturning of Hysteresis control module, electricity generation system control as adjacent height mode, and operational mode variable update is current high operational mode；
If DC master row voltage changes from high to low, when DC master row voltage is less than the one of adjacent low mode switching point threshold value and return difference
When half difference, the voltage hysteresis control module overturning of controller controls electricity generation system for adjacent low mode, operational mode variable
It is updated to current low operational mode.Voltage hysteresis control technology is used at switching point, it can frequently cutting to avoid operational mode
It changes, increases operation of electric power system reliability.
2) electricity generation system control method
Power generation with marine energy system control target is to make full use of power generation with marine energy and stable DC busbar voltage, but ocean
The randomness of energy power generation, the load of platform well drilling machine change and can all influence voltage stabilization with the fluctuation of network of ship Power Exchange
Property.Control strategy is divided into 5 kinds of different operational modes, as shown in Figure 2 according to the variation of DC master row voltage by the present invention.
In Fig. 2, ordinateU dc For the voltage of DC master row 14, abscissaModeFor operational mode,U dcn For DC master row
14 voltage rating,U H2 、U H1 、U L1 、U L2 For the voltage threshold of different control mode switch points,U H2 =105%U dcn ,U H1 =102%U dcn ,U L1 =98% U dcn ,U L2 =95% U dcn .For the frequent switching for avoiding operational mode, voltage hysteresis control is used at switching point
System, there are a certain amount of return differences for voltage threshold.
(1) operational mode 1:U dc ≤U L2
14 voltage of DC master row is lower than the 95% of rated value, shows the output power of power generation with marine energy unit and energy-storage units
It is unable to satisfy the power demand of trepan load, there are relatively high power vacancy.At this point, grid-connected two-way AC/DC current transformer 12 works
Mode of hanging down at constant pressure maintains electricity generation system energy balance by rectification by network of ship power injection DC master row 14, constant
The voltage of DC master row 14；Wind-driven generator AC/DC current transformer 9, marine tidal-current energy generator AC/DC current transformer 10, wave-energy power generation
The work of machine AC/DC current transformer 11 improves power generation with marine energy efficiency in maximal power tracing MPPT mode；The two-way DC/ of power battery
DC current transformer 7 works according to the SOC value of power battery 5 in current limliting discharge mode or standby mode.
(2) operational mode 2:U L2 <U dc ≤U L1
The low voltage of DC master row 14 shows the output power of power generation with marine energy unit between the 95% ~ 98% of rated value
Less than the power consumption of trepan load, there are a small amount of power shortages.At this point, energy-storage units put into operation, power battery is two-way
The work of DC/DC current transformer 7 is hung down mode at constant pressure, and by discharging the power of power battery 5, the power of offset electricity generation unit is lacked
Volume, and play the role of the voltage of Constant Direct Current busbar 14；Wind-driven generator AC/DC current transformer 9, marine tidal-current energy generator AC/DC
Current transformer 10, the work of wave energy generator AC/DC current transformer 11 export electricity in maximal power tracing MPPT mode with peak efficiency
Energy；And grid-connected two-way AC/DC current transformer 12 is in standby and is not involved in energy exchange.
(3) operational mode 3:U L1 <U dc <U H1
The voltage of DC master row 14 maintains near rated value, between the 98% ~ 102% of rated value, shows power generation with marine energy
The output power of unit substantially meets the power consumption of trepan load.At this point, wind-driven generator AC/DC current transformer 9, marine tidal-current energy
Generator AC/DC current transformer 10, the work of wave energy generator AC/DC current transformer 11 are in maximal power tracing MPPT mode；It is grid-connected
Two-way AC/DC current transformer 12, which is in standby, is not involved in energy exchange；The work of power battery two-way DC/DC current transformer 7 to
Machine state is not involved in energy exchange, and the minor fluctuations to avoid load consuming power and generator unit output power cause power electric
The frequent charge and discharge in pond.In this mode of operation, due to not having Isobarically Control link, the voltage of DC master row 14 is loaded and sea
Ocean can influence fluctuate in a small range of permission.
(4) operational mode 4:U H1 ≤U dc <U H2
The voltage of DC master row 14 is higher, between the 102% ~ 105% of rated value, shows the output work of power generation with marine energy unit
Rate is slightly larger than the power consumption of trepan load, and it is remaining a small amount of power occur.At this point, grid-connected two-way AC/DC current transformer 12 is in
Standby mode is not involved in energy exchange；Power battery two-way DC/DC current transformer 7 work is hung down mode at constant pressure, to power battery 5
Charging reduces the voltage of simultaneously stable DC busbar 14 by absorbing power；When the SOC of power battery 5 charges to the limit, power electric
The two-way DC/DC current transformer 7 in pond is transferred to standby mode, and wind-driven generator AC/DC current transformer 9, marine tidal-current energy generator AC/DC unsteady flow
Device 10, wave energy generator AC/DC current transformer 11 switch to the sagging mode of constant pressure by maximal power tracing MPPT working method, reduce
Output power maintains power-balance, the voltage of Constant Direct Current busbar 14.
(5) operational mode 5:U dc ≥U H2
The voltage of DC master row 14 is higher than the 105% of rated value, shows the output power of power generation with marine energy unit much larger than brill
, there is a large amount of dump power in the power consumption of well machine load.At this point, grid-connected two-way AC/DC current transformer work is hung down at constant pressure
The dump power of DC master row 14 is injected network of ship by inversion, maintains electricity generation system energy balance, Constant Direct Current by mode
The voltage of busbar 14；The two-way DC/DC current transformer 7 of power battery, according to the SOC value of power battery 5, work in charged state or
Standby mode；Wind-driven generator AC/DC current transformer 9, marine tidal-current energy generator AC/DC current transformer 10, wave energy generator AC/DC become
The work of device 11 is flowed in maximal power tracing MPPT mode, improves power generation with marine energy efficiency.
Using above-mentioned control strategy, each current transformer works independently in power generation with marine energy system, hands between each other without data
It changes, to simplify the complexity of control system, improves the real-time of control.In different operational modes, coordinate control
The operating status and working method of each current transformer are made, so that system in different modes can stable DC busbar voltage, it is ensured that
Power-balance in system provides high quality electric energy for the load of platform well drilling machine.
Claims (2)
1. a kind of power generation with marine energy system suitable for ocean platform frequency conversion drive trepan, including generator unit, energy-storage units,
And net unit, load unit, DC master row and controller；It is characterized by:
Generator unit includes solar-energy photo-voltaic cell, photovoltaic cell DC/DC current transformer, wind-driven generator, wind-driven generator AC/DC
Current transformer, marine tidal-current energy generator, marine tidal-current energy generator AC/DC current transformer, wave energy generator, wave energy generator AC/DC become
Flow device；Solar-energy photo-voltaic cell, wind-driven generator, marine tidal-current energy generator, wave energy generator, wave energy generator AC/DC become
It flows device and ocean energy is converted into electric energy, pass through corresponding photovoltaic cell DC/DC current transformer, wind-driven generator AC/DC current transformer, tide
Stream energy generator AC/DC current transformer, wave energy generator AC/DC current transformer inject direct current energy to DC master row；Photovoltaic cell
DC/DC current transformer, wind-driven generator AC/DC current transformer, marine tidal-current energy generator AC/DC current transformer, wave energy generator AC/DC become
Stream device is PWM converter, can both have been worked in maximal power tracing mode, and can also work mode of hanging down at constant pressure；
Energy-storage units include power battery and the two-way DC/DC current transformer of power battery；The two-way DC/DC current transformer of power battery has
Charging, electric discharge and standby 3 kinds of operating statuses and constant pressure is sagging and 2 kinds of working methods of current limliting；It is transported in network of ship fault disturbance
Under row mode, energy-storage units utilize two-way DC/DC current transformer, by charge or discharge come stable DC busbar voltage；Work as power
When battery charge state exceeds upper and lower limits, power battery is prohibited charge and discharge, avoids the occurrence of and overcharges or over-discharge phenomenon；
And net unit includes grid-connected two-way AC/DC current transformer and isolating transformer, and DC master row is accessed network of ship, realizes institute
State the parallel running of the power generation with marine energy system and both network of ship suitable for ocean platform frequency conversion drive trepan；It is grid-connected double
There is inversion, rectification, standby 3 kinds of operating statuses to AC/DC converter and constant pressure is sagging and 2 kinds of working methods of current limliting；Control
Device carries out operating status to simultaneously net unit and working method switches, and is suitable for ocean platform frequency conversion drive trepan described in control
Power Exchange between power generation with marine energy system and network of ship；When generator unit malfunction and failure, network of ship is independently-powered
Trepan load；Grid-connected two-way AC/DC current transformer is in current-limiting mode under overload, and otherwise work side of hanging down at constant pressure
Formula；
Load unit includes platform well drilling machine inverter and drilling well electric motor；Drilling well electric motor connecting platform trepan inversion
Device, platform well drilling machine inverter connect DC master row；
Controller connects DC master row and the two-way DC/DC current transformer of power battery, photovoltaic cell DC/DC current transformer, wind energy hair
Motor AC/DC current transformer, marine tidal-current energy generator AC/DC current transformer, wave energy generator AC/DC current transformer, according to DC master row
The two-way DC/DC current transformer of voltage control power battery, photovoltaic cell DC/DC current transformer, wind-driven generator AC/DC current transformer,
The operating status and working method of marine tidal-current energy generator AC/DC current transformer, wave energy generator AC/DC current transformer, adjust each change
Flow the electric energy streams of device；
Controller uses voltage hysteresis control method, and operational mode variable is arranged, and identifies electricity generation system present mode of operation；Power generation
The DC master row voltage signal difference of system running pattern switching front and back is known as return difference；If DC master row voltage becomes from low to high
Change, when DC master row voltage is greater than the sum of adjacent height mode switching point threshold value and half of return difference, the voltage hysteresis of controller
Control module overturning, electricity generation system control as adjacent height mode, and operational mode variable update is current high operational mode；If
DC master row voltage changes from high to low, when DC master row voltage be less than adjacent low mode switching point threshold value and return difference half it
When poor, the voltage hysteresis control module of controller is overturn, and electricity generation system is controlled as adjacent low mode, operational mode variable update
For current low operational mode.
2. being suitable for the power generation with marine energy system of ocean platform frequency conversion drive trepan as described in claim 1, feature exists
In: according to the variation of DC master row voltage, controller allows the ocean energy suitable for ocean platform frequency conversion drive trepan to send out
Electric system works in following 5 kinds of different operational modes:
Operational mode 1:Udc≤UL2
Grid-connected two-way AC/DC current transformer work is hung down mode at constant pressure, and network of ship power is injected DC master row by rectification,
The power generation with marine energy system capacity suitable for ocean platform frequency conversion drive trepan is maintained to balance, Constant Direct Current busbar electricity
Pressure；Wind-driven generator AC/DC current transformer, marine tidal-current energy generator AC/DC current transformer, the work of wave energy generator AC/DC current transformer
In maximal power tracing MPPT mode, power generation with marine energy efficiency is improved；The two-way DC/DC current transformer of power battery, according to power electric
The SOC value in pond works in current limliting discharge mode or standby mode；
Operational mode 2:UL2< Udc≤UL1
Energy-storage units put into operation, and power battery two-way DC/DC current transformer work is hung down mode at constant pressure, pass through release power electric
Pond power, the power shortage of offset electricity generation unit, and play the role of Constant Direct Current busbar voltage；Wind-driven generator AC/DC becomes
Device, marine tidal-current energy generator AC/DC current transformer, the work of wave energy generator AC/DC current transformer are flowed in the maximal power tracing side MPPT
Formula exports electric energy with peak efficiency；And grid-connected two-way AC/DC current transformer is in standby and is not involved in energy exchange；
Operational mode 3:UL1< Udc< UH1
Current transformer work is generated electricity in maximal power tracing MPPT mode；Grid-connected two-way AC/DC current transformer, which is in standby, does not join
With energy exchange；The two-way DC/DC current transformer work of power battery is not involved in energy exchange in standby mode；
Operational mode 4:UH1≤Udc< UH2
Grid-connected two-way AC/DC current transformer, which is in standby, is not involved in energy exchange；The two-way DC/DC current transformer work of power battery
Mode of hanging down at constant pressure reduces simultaneously stable DC busbar voltage by absorbing power to power battery charging；Work as power battery
SOC charges to the limit, and the two-way DC/DC current transformer of power battery is transferred to standby mode, and wind-driven generator AC/DC current transformer, tide
Stream energy generator AC/DC current transformer, wave energy generator AC/DC current transformer switch to perseverance by maximal power tracing MPPT working method
The mode of hanging down is depressed, output power is reduced, maintains power-balance, Constant Direct Current busbar voltage；
Operational mode 5:Udc≥UH2
Grid-connected two-way AC/DC current transformer work is hung down mode at constant pressure, and DC master row dump power is injected ship by inversion
Power grid maintains electricity generation system energy balance, Constant Direct Current busbar voltage；The two-way DC/DC current transformer of power battery, according to power electric
Pond SOC value works in charged state or standby mode；Wind-driven generator AC/DC current transformer, marine tidal-current energy generator AC/DC become
Device, the work of wave energy generator AC/DC current transformer are flowed in maximal power tracing MPPT mode, improve power generation with marine energy efficiency；
Wherein, UdcFor DC master row voltage, UdcnFor DC master row voltage rating, UH2、UH1、UL1、UL2It is cut for different control models
Change voltage threshold a little, UH2=105%Udcn, UH1=102%Udcn, UL1=98%Udcn, UL2=95%Udcn。
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| CN112366982B (en) * | 2020-03-30 | 2022-09-16 | 山东省科学院海洋仪器仪表研究所 | Power supply device for slow start of underwater winch and control method thereof |
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