CN108233371A - Marine wind electric field combines hair electric power system with island microgrid - Google Patents
Marine wind electric field combines hair electric power system with island microgrid Download PDFInfo
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- CN108233371A CN108233371A CN201810235278.5A CN201810235278A CN108233371A CN 108233371 A CN108233371 A CN 108233371A CN 201810235278 A CN201810235278 A CN 201810235278A CN 108233371 A CN108233371 A CN 108233371A
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- 230000005684 electric field Effects 0.000 title claims abstract description 141
- 230000005611 electricity Effects 0.000 claims abstract description 63
- 230000005540 biological transmission Effects 0.000 claims abstract description 27
- 238000010248 power generation Methods 0.000 claims abstract description 24
- 238000004146 energy storage Methods 0.000 claims description 19
- 238000010276 construction Methods 0.000 abstract description 9
- 239000007789 gas Substances 0.000 description 11
- 238000010586 diagram Methods 0.000 description 5
- 238000005516 engineering process Methods 0.000 description 5
- 230000008901 benefit Effects 0.000 description 3
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 description 2
- 238000002485 combustion reaction Methods 0.000 description 2
- 238000010612 desalination reaction Methods 0.000 description 2
- 239000002283 diesel fuel Substances 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000010304 firing Methods 0.000 description 2
- 239000001257 hydrogen Substances 0.000 description 2
- 229910052739 hydrogen Inorganic materials 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 239000013535 sea water Substances 0.000 description 2
- 241000196324 Embryophyta Species 0.000 description 1
- 240000007594 Oryza sativa Species 0.000 description 1
- 235000007164 Oryza sativa Nutrition 0.000 description 1
- 229910000831 Steel Inorganic materials 0.000 description 1
- 239000002131 composite material Substances 0.000 description 1
- 230000006837 decompression Effects 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
- 238000009429 electrical wiring Methods 0.000 description 1
- 239000000446 fuel Substances 0.000 description 1
- 230000013011 mating Effects 0.000 description 1
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Classifications
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- 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
-
- 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
- H02J3/38—Arrangements for parallely feeding a single network by two or more generators, converters or transformers
- H02J3/381—Dispersed generators
-
- H02J3/386—
-
- 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
- H02J3/38—Arrangements for parallely feeding a single network by two or more generators, converters or transformers
- H02J3/46—Controlling of the sharing of output between the generators, converters, or transformers
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- 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
- H02J3/38—Arrangements for parallely feeding a single network by two or more generators, converters or transformers
- H02J3/388—Islanding, i.e. disconnection of local power supply from the network
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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
- Y02E10/76—Power conversion electric or electronic aspects
Abstract
Combine hair electric power system with island microgrid the present invention relates to a kind of marine wind electric field of the present invention, marine wind electric field power grid including connecting continental Grid, it connects several first kind island microgrids of marine wind electric field power grid and connects several second class island microgrids of first kind island microgrid；Marine wind electric field power grid includes at least two power generation transmission of electricity modules；Power generation transmission of electricity module includes transmission of electricity module, electricity generation module；The one end for module of transmitting electricity connects continental Grid by the first single busbar, the other end connects corresponding electricity generation module, first kind island microgrid by sectionalized busbar respectively, marine wind electric field of the present invention is enabled to combine hair electric power system with island microgrid and carries out power interconnection for numerous island microgrids using the power transmission network of marine wind electric field, ensure island power supply reliability and economy, the investment of extra large cable construction is greatly reduced.
Description
Technical field
The present invention relates to island power supply technical fields, combine hair with island microgrid more particularly to a kind of marine wind electric field
Electric power system.
Background technology
More than 300 ten thousand km of China2(sq-km) coastal areas and territorial seas is dispersed with a islands and reefs up to ten thousand, wherein, area is more than 500m2(square
Rice) island more than 6500, have resident population on a island more than 400.In April, 2011, National Bureau of Oceanography announced first batch of 176 of China
For the non inhabitation islands register of exploitation, scientific development athermal effect prelude is formally pulled open, indicates that China's economic development will be moved towards
Ocean and the exploitation for focusing more on marine resources and remote island.
At present, there are mainly three types of modes for the supply of electric power on remote island：(1) fuel-firing gas-firing power plant is built on island, with
Diesel-driven generator or small gas unit are as power generating source；(2) it is built on island with wind-powered electricity generation, photovoltaic, diesel-driven generator/micro-
Gas turbine, energy storage etc. are the island microgrid electric power system of micro battery；(3) it uses and continent power interconnection mode.
But during realization, inventor has found that at least there are the following problems in traditional technology：First way, combustion
Oily plant gas generating efficiency is low, fuel supply is inconvenient, and environment can be damaged；The second way, wind-powered electricity generation and photovoltaic are only
Electric energy supplement can be used as, it is still desirable to using diesel-driven generator/micro- gas turbine as main power source；The third mode, due to sea
It is very high to be individually for remote island construction submarine cable power supply cost for bottom cable constructions somewhat expensive.
Invention content
Based on this, it is necessary to the problem of cannot being supported mutually for traditional technology marine wind electric field and island microgrid, carry
Combine hair electric power system with island microgrid for a kind of marine wind electric field.
To achieve these goals, combine hair with island microgrid an embodiment of the present invention provides a kind of marine wind electric field to supply
Electric system, the marine wind electric field power grid including connecting continental Grid, several first kind islands for connecting marine wind electric field power grid are micro-
Power grid and several second class island microgrids for connecting first kind island microgrid；
Marine wind electric field power grid includes at least two power generation transmission of electricity modules；Power generation transmission of electricity module includes transmission of electricity module, power generation
Module；The one end for module of transmitting electricity connects continental Grid by the first single busbar, and the other end connects correspondence respectively by sectionalized busbar
Electricity generation module, first kind island microgrid.
First kind island microgrid includes first kind island step-down transformer, first kind sea in one of the embodiments,
Island load blocks, the second single busbar and third single busbar；
One end of first kind island step-down transformer connects the second single busbar, the other end connects first by third single busbar
Class island load blocks；
Second single busbar connects the second class island by the first submarine cable connection segment busbar by the second submarine cable
Micro-capacitance sensor.
First kind island microgrid further includes power generator in one of the embodiments,；
Power generator connection third single busbar, first kind island load blocks.
Power generator includes island wind turbine power generation unit, the diesel oil of connection third single busbar in one of the embodiments,
Generator unit and photovoltaic generation unit；Diesel generation unit, photovoltaic generation unit connect first kind island load blocks respectively.
Island microgrid further includes energy-storage module in one of the embodiments,；
Energy-storage module connection power generator, first kind island load blocks and third single busbar.
Unite in one of the embodiments, first kind island step-down transformer for 35KV/10KV types step-down transformer or
35KV/400V type step-down transformers.
The second class island microgrid includes the second class island step-down transformer, the second class sea in one of the embodiments,
Island load blocks, the 4th single busbar and the 5th single busbar；
One end of second class island step-down transformer connects the 4th single busbar, the other end connects second by the 5th single busbar
Class island load blocks；
4th single busbar connects the second single busbar by third submarine cable.
Electricity generation module includes Wind turbines unit in one of the embodiments,；
Wind turbines unit connects transmission of electricity module by sectionalized busbar.
Transmission of electricity module includes main transformer in one of the embodiments,；
One end of main transformer connects continental Grid by the first single busbar, and the other end is connected pair respectively by sectionalized busbar
The Wind turbines unit answered, first kind island microgrid.
Main transformer is 220KV/35KV type main transformers in one of the embodiments,.
A technical solution in above-mentioned technical proposal has the following advantages that and advantageous effect：
First kind island microgrid is attached with marine wind electric field, the second class island microgrid and first kind island are micro-
Power grid is attached, and realizes that island microgrid combines hair power supply with marine wind electric field so that marine wind electric field of the present invention and island
Micro-capacitance sensor joint hair electric power system can carry out power interconnection using the power transmission network of marine wind electric field for numerous island microgrids, protect
Island power supply reliability and economy are demonstrate,proved, the investment of extra large cable construction is greatly reduced；Island microgrid can be used as sea in turn
The deferrable load of wind power plant so that the operation of marine wind electric field is more flexible, convenient for meeting the requirement of the peak-frequency regulation of power grid, and
And island microgrid also can be as the emergency auxiliary power of marine wind electric field, so as to reduce the diesel-driven generator of marine wind electric field
Configuration, so as to reduce equipment investment.
Description of the drawings
Fig. 1 is the structural representation that marine wind electric field of the present invention combines hair electric power system with island microgrid in one embodiment
Figure；
Fig. 2 is the structure diagram of island microgrid in the present invention in one embodiment；
Fig. 3 is the structure diagram of island microgrid in the present invention in another embodiment；
Fig. 4 is the structure diagram of island microgrid in the present invention in another embodiment；
Fig. 5 is the electrical wiring that marine wind electric field of the present invention combines hair electric power system with island microgrid in one embodiment
Figure.
Specific embodiment
For the ease of understanding the present invention, the present invention is described more fully below with reference to relevant drawings.In attached drawing
Give the preferred embodiment of the present invention.But the present invention can realize in many different forms, however it is not limited to this paper institutes
The embodiment of description.On the contrary, the purpose for providing these embodiments is made to the disclosure more thorough and comprehensive.
It should be noted that when an element is considered as " connection " another element, it can be directly to separately
One element simultaneously in combination is integrated or may be simultaneously present centering elements.It is term as used herein " one end ", " another
One end " and similar statement are for illustrative purposes only.
Unless otherwise defined, all of technologies and scientific terms used here by the article is with belonging to technical field of the invention
The normally understood meaning of technical staff is identical.Term used in the description of the invention herein is intended merely to description tool
The purpose of the embodiment of body, it is not intended that in the limitation present invention.Term as used herein " and/or " including one or more phases
The arbitrary and all combination of the Listed Items of pass.
In order to solve the problems, such as that traditional technology marine wind electric field cannot be supported mutually with island microgrid, Fig. 1 is a reality
The structure diagram that marine wind electric field of the present invention in example combines hair electric power system with island microgrid is applied, as shown in Figure 1, of the invention
Marine wind electric field combines hair electric power system with island microgrid, the marine wind electric field power grid 120 including connecting continental Grid 110,
It connects several first kind island microgrids 130 of marine wind electric field power grid 120 and connects first kind island microgrid 130
Several second class island microgrids 140；
Marine wind electric field power grid 120 includes at least two power generation transmission of electricity modules 122；Power generation transmission of electricity module 122 includes transmission of electricity
Module 1224, electricity generation module 1222；The one end for module 1224 of transmitting electricity connects continental Grid 110 by the first single busbar 150, another
End connects corresponding electricity generation module 1222, first kind island microgrid 130 respectively by 160 section wiring of sectionalized busbar.
Wherein, first kind island microgrid and the second class island microgrid are identical in electric network composition, can be according to island
The height of cost that micro-capacitance sensor is directly connected to marine wind electric field, two class island microgrids are divided by island microgrid, wherein
First kind island microgrid is nearer apart from marine wind electric field, low with the cost that marine wind electric field is directly connected to；Second class island is micro-
Power grid apart from marine wind electric field farther out, be directly connected to marine wind electric field it is of high cost, by with first kind sea closer to the distance
Island micro-capacitance sensor is directly connected to, and is equivalent to the second class island microgrid and is indirectly connected with offshore wind farm by first kind island microgrid
.And independent power generation is realized on island.
Module of transmitting electricity is the electricity for generating electricity generation module, is integrated and voltage transformation, then exports electric energy to big
Land power grid or island microgrid.Electricity generation module can convert wind energy into electric energy.
Single busbar can will be in each power grid (present invention in refer to continental Grid, marine wind electric field power grid and island microgrid)
Inlet-outlet line be flowed in single busbar, realize the interconnection between each power grid.Wherein sectionalized busbar is connect using sectionalized single busbar connection
Line mode, one power generation transmission of electricity module of each section of connection.
Specifically, marine wind electric field of the present invention, which combines hair electric power system with island microgrid, has following four Working mould
Formula：
(1) marine wind electric field and island microgrid independently power generation mode.
In this mode, the connection of marine wind electric field and continental Grid is closed, the company of marine wind electric field and island microgrid
Connect disconnection.The electric energy that electricity generation module is sent out sends out submarine cable access continental Grid after module of transmitting electricity through the first single busbar.
At this point, island microgrid is in isolated power grid pattern, the connection with marine wind electric field disconnects.It can be by certainly on island
Main power generation meets the power demand in a short time on island.The island microgrid Energy Management System by being configured in this mode
Energy compatibility control is carried out, forms stable isolated power network as the load power supply on island.
(2) marine wind electric field is connected with island microgrid, from marine wind electric field to island microgrid powering mode.
In this mode, the connection of marine wind electric field and continental Grid is closed, and marine wind electric field is connected with island microgrid
Connection be closed.When the electric energy that marine wind electric field is sent out is more than island microgrid workload demand, electric energy that electricity generation module is sent out
After being connected to transmission of electricity module, a part is sent through 35kV (kilovolt) connection island extra large cables to island microgrid, remaining electric energy leads to through module of transmitting electricity
High-voltage undersea cable is crossed to send to continental Grid.When the electric energy that marine wind electric field is sent out is less than island microgrid workload demand, greatly
The electric energy of land power grid is sent out extra large cable through high pressure and is sent to transmission of electricity module, is depressurized to after 35kV together with the electric energy that electricity generation module is sent out
Join island extra large cable by 35kV to power for island microgrid.
Island microgrid is in the pattern that is incorporated into the power networks, and the connection with marine wind electric field is closed.Autonomous power generating unit on island
As cold standby power supply, do not put into operation.
(3) marine wind electric field is connected with island microgrid, is powered from marine wind electric field to island microgrid, island microgrid
Deferrable load pattern as marine wind electric field.
In this mode, marine wind electric field needs to participate in the peak-frequency regulation of continental Grid, the electric energy that marine wind electric field is sent out
It is more than to have access to the sum of continental Grid capacity and micro-capacitance sensor base load capacity in certain stage.It needs to be configured in this mode
It can carry out coordinating the Energy Management System of control to marine wind electric field and island microgrid.
The connection of marine wind electric field and continental Grid is closed, and marine wind electric field is closed with the connection that island microgrid is connected.
Island microgrid is in the pattern that is incorporated into the power networks, and the connection with marine wind electric field is closed.Autonomous power generating unit is as cold standby on island
With power supply, do not put into operation.
When continental Grid needs marine wind electric field to participate in peak-frequency regulation, the grid connection capacity of marine wind electric field need to meet power grid
Scheduling requirement, at this point, the electric energy that sends out of marine wind electric field be more than scheduling requirement capacity and island microgrid base load capacity it
With.The power generation capacity of marine wind electric field is such as limited by shutting down electricity generation module mode, it will cause the discarded of clean energy resource.
Under the pattern 3 of the present invention, island microgrid can regard the adjustable load of marine wind electric field as, by the energy management system being uniformly configured
System is instructed according to dispatching of power netwoks, coordinates control marine wind electric field and deferrable load and energy storage device in island microgrid, by can
Calling electric load, extra electric energy can be also stored in energy storage device using the extra electric energy of marine wind electric field.The pattern can be most
Limits utilize offshore wind farm clean energy resource, make maximization of economic benefit.
(4) marine wind electric field is connected with island microgrid, and marine wind electric field is disengaged with bulk power grid, and island microgrid is as sea
The emergency standby power of upper wind power plant provides emergency power supply pattern from island microgrid to marine wind electric field.
Under the pattern, marine wind electric field is due to typhoon or sends out extra large cable failure and continental Grid disengagement, at this time electricity generation module
It can not generate electricity, the connection of marine wind electric field and island microgrid is closed.
The connection of island microgrid and marine wind electric field is closed.Autonomous power generating unit puts into operation on island, the micro- electricity in island
The electric energy that net is sent out is sent through 35kV connection island extra large cables to transmission of electricity module sectionalized busbar, in addition to island internal loading needs are met for sea
Wind power plant provides station electricity consumption and emergency power supply.
It should be noted that the junction of each power grid is fitted with electric switch.
Marine wind electric field of the present invention combines hair each embodiment of electric power system with island microgrid, by first kind island microgrid
It is attached with marine wind electric field, the second class island microgrid is attached with first kind island microgrid, realizes the micro- electricity in island
Net combines hair power supply with marine wind electric field so that marine wind electric field of the present invention combines hair electric power system with island microgrid being capable of profit
Power interconnection is carried out for numerous island microgrids with the power transmission network of marine wind electric field, ensures island power supply reliability and economy,
The investment of extra large cable construction is greatly reduced；Island microgrid can be as the deferrable load of marine wind electric field in turn so that marine
The operation of wind power plant is more flexible, and convenient for meeting the requirement of the peak-frequency regulation of power grid, and island microgrid can also be used as sea
The emergency auxiliary power of wind power plant, so as to reduce the configuration of the diesel-driven generator of marine wind electric field, so as to reduce equipment investment, and
And the system that continental Grid, island microgrid and marine wind electric field are formed has four kinds of operating modes, be continental Grid, island
It realizes between micro-capacitance sensor and marine wind electric field and supports mutually, continental Grid, island microgrid and marine wind electric field can be more preferable, more
The operation of safety.
In a specific embodiment, Fig. 2 is the structure diagram of island microgrid in the present invention in one embodiment,
As shown in Fig. 2, first kind island microgrid includes first kind island step-down transformer, first kind island load blocks, the second list
Busbar and third single busbar；
One end of first kind island step-down transformer connects the second single busbar, the other end connects first by third single busbar
Class island load blocks；
Second single busbar connects the second class island by the first submarine cable connection segment busbar by the second submarine cable
Micro-capacitance sensor.
Further, first kind island step-down transformer is depressured for 35KV/10KV types step-down transformer or 35KV/400V types
Transformer.
Wherein, first kind island step-down transformer can by by marine wind electric field electrical grid transmission Lai voltage, handled through decompression,
Input island microgrid.Third single busbar converges in the first kind island load blocks on island on one single busbar.It is optional
, first kind island step-down transformer can select 35KV/10KV types step-down transformer or 35KV/400V (volt) according to actual needs
Type step-down transformer,
Specifically, electric energy is transferred to first kind island downconverter by marine wind electric field power grid by the second single busbar
Device, the first kind island step-down transformer voltage of input is depressured after by electric energy by third single busbar be first kind island
Power load modules.
Marine wind electric field of the present invention combines hair each embodiment of electric power system with island microgrid, utilizes the defeated of marine wind electric field
Electric network is embodied as numerous island power interconnections, ensures island power supply reliability and economy, the throwing of extra large cable construction is greatly decreased
Money.
In a specific embodiment, Fig. 3 is the structural representation of island microgrid in the present invention in another embodiment
Figure, as shown in figure 3, first kind island microgrid further includes power generator；
Power generator connection third single busbar, first kind island load blocks.
Further, power generator include the connection island wind turbine power generation unit of third single busbar, diesel generation unit with
And photovoltaic generation unit；Diesel generation unit, photovoltaic generation unit connect first kind island load blocks respectively.
Specifically, building power generator on island, island independent power generation can be realized, further, power generator point
For island wind turbine power generation unit, diesel generation unit, photovoltaic generation unit and micro- gas turbine.Island wind turbine power generation unit,
Diesel generation unit, photovoltaic generation unit are incorporated to third single busbar.
First kind island load blocks include normal load, important load, tunable load.Diesel generation unit and micro- combustion
Gas-turbine can directly be important load supplying；Normal load and tunable load can be obtained electric energy by third single busbar, also led to
Cross photovoltaic cells power supply.
It should be noted that island wind turbine power generation unit, diesel generation unit, photovoltaic generation unit and micro- gas turbine
Electricity can boost through first kind island step-down transformer, be transferred to marine wind electric field power grid.
Marine wind electric field of the present invention combines hair each embodiment of electric power system, the micro- electricity in auxiliary construction island with island microgrid
Net builds generator unit, diesel generation unit, photovoltaic generation unit and micro- gas turbine so that island power supply on island
It is relatively reliable flexibly, can both realize with marine wind electric field grid network power, also can in extra large cable failure independently-powered, Er Qieke
The honourable resource on island is made full use of, improves the utilization rate of clean energy resource.
In a specific embodiment, Fig. 4 is the structural representation of island microgrid in the present invention in another embodiment
Figure, as shown in figure 4, island microgrid further includes energy-storage module；
Energy-storage module connection power generator, first kind island load blocks and third single busbar.
Specifically, auxiliary construction energy-storage module in island microgrid, in electric energy abundance, energy-storage module can store richness
Remaining electric energy is as emergency power；When island microgrid failure or electricity shortage, energy-storage module can supply temporarily
Electricity.
Marine wind electric field of the present invention combines hair each embodiment of electric power system with island microgrid, builds island microgrid is mating
If energy-storage module, island microgrid Ability of emergency management is improved.
In a specific embodiment, the second class island microgrid includes the second class island step-down transformer, the second class sea
Island load blocks, the 4th single busbar and the 5th single busbar；
One end of second class island step-down transformer connects the 4th single busbar, the other end connects second by the 5th single busbar
Class island load blocks；
4th single busbar connects the second single busbar by third submarine cable.
Specifically, the second class sea island micro-grid structure is identical with first kind sea island micro-grid structure, details are not described herein again.
Marine wind electric field of the present invention combines hair each embodiment of electric power system with island microgrid, is embodied as the micro- electricity in numerous islands
Net joint power supply.
In a specific embodiment, electricity generation module includes Wind turbines unit；
Wind turbines unit connects transmission of electricity module by sectionalized busbar.
Further, transmission of electricity module includes main transformer；
One end of main transformer connects continental Grid by the first single busbar, and the other end is connected pair respectively by sectionalized busbar
The Wind turbines unit answered, first kind island microgrid.
Further, main transformer is 220KV/35KV type main transformers.
Specifically, marine wind electric field includes multigroup wind turbine unit, wherein, each Wind turbines unit converts wind energy into
Electric energy converges via main transformer, and boosts and be transferred to continental Grid, island microgrid.Preferably, main transformer is optional
220KV/35KV type main transformers.
Marine wind electric field of the present invention combines hair each embodiment of electric power system with island microgrid, and marine wind electric field is micro- with island
Power grid coordinates well, and good support is provided for island microgrid power supply.
In a preferred embodiment, Fig. 5 joins for marine wind electric field of the present invention in one embodiment and island microgrid
The electric hookup of hair electric power system is closed, as shown in figure 5,
Specifically, offshore boosting station (transmission of electricity module) builds wind-powered electricity generation field marine at sea, voltage class with flat form
For 220kV.
Offshore boosting station send electric energy to land through 2 times 220kV seabed photoelectric composite cables (L1, L2), is controlled through land collection
Continental Grid is accessed behind center.
Offshore boosting station sets the main transformer (TM1, TM2) of two 220kV/35kV.220kV sides use single bus scheme
(M101), totally 2 times main transformer inlet wires (103,104), 2 return back out line (101,102).35kV sides using single-trunk segmental wiring (M201,
M202).Wind turbines (G1, G2) access 35kV busbares after collecting through 35kV current collections extra large cable (L4, L5).
Island microgrid is connected through 35kV connection island extra large cables (L3, L6) with offshore boosting station, and multiple island microgrids can be distinguished
It is connected on 2 sections of 35kV busbares (M201, M202).Each Hui Lian islands extra large cable can be one or more island power supplies.
Island microgrid sets 1 step-down transformer (TM3), and micro-capacitance sensor voltage grade can be according to micro-capacitance sensor scale selection
10kV or 400V.When joining island extra large cable for an island power supply, 35kV sides become prescription formula using line；When for multiple island power supplies,
35kV sides use single bus scheme (M203), and other island microgrids of connection are connected to 35kV busbares through submarine cable (L7).
It should be noted that marine wind electric field power grid, which combines hair electric power system with island microgrid, has following 4 kinds operations
Pattern：
(1) marine wind electric field and island microgrid independently power generation mode.
In this mode, the 220kV switches that marine wind electric field power grid is connected with continental Grid are closed (101,102), marine
The 35kV switches (203,206) that wind farm is connected with island microgrid disconnect.The electric energy that blower motor group is sent out is through sea
Booster stations collect boosting after through high pressure send out submarine cable access continental Grid.
Island microgrid is in isolated power grid pattern, and the 35kV switches (207) being connected with marine wind electric field power grid disconnect.With
The power generation that diesel-driven generator, micro- gas turbine, energy storage device for being configured in island microgrid etc. can provide burning voltage frequency is set
Standby to power as main power source, island wind turbine and photovoltaic system also access island microgrid system.Island microgrid is in this mode
Energy compatibility control is carried out by the Energy Management System being configured, forms stable isolated power network as the load power supply on island.
(2) marine wind electric field is connected with island microgrid, from marine wind electric field to island microgrid powering mode
In this mode, the 220kV switches that marine wind electric field power grid is connected with network system are closed (101,102), marine
The 35kV switches (203,206) that wind farm is connected with island microgrid are closed.When the electric energy that marine wind electric field is sent out is more than
During island microgrid workload demand, after electric energy that blower motor group is sent out is connected to offshore boosting station, a part is through 35kV connection island sea
Cable is sent to island microgrid, remaining electric energy is sent by high-voltage undersea cable to treating continental Grid after main transformer boosts.Work as sea turn
When the electric energy that electric field is sent out is less than island microgrid workload demand, the electric energy of continental Grid is sent out extra large cable through high pressure and is sent to sea
Booster stations send 35kV connection island extra large cables to power for island microgrid after being depressurized to 35kV together with the electric energy that blower motor group is sent out.
Island microgrid is in the pattern that is incorporated into the power networks, and the 35kV switches (207) being connected with marine wind electric field power grid are closed.Sea
The diesel-driven generator that is configured in the micro-capacitance sensor of island, micro- gas turbine do not put into operation as cold standby power supply；Island wind turbine and photovoltaic
System access island microgrid system；Energy-storage system can choose whether to put into according to actual demand.
(3) marine wind electric field is connected with island microgrid, is powered from marine wind electric field to island microgrid, island microgrid
Deferrable load pattern as marine wind electric field.
In this mode, marine wind electric field power grid needs to participate in the peak-frequency regulation of continental Grid, what marine wind electric field was sent out
Electric energy is more than to have access to the sum of continental Grid capacity and island microgrid base load capacity in certain stage.Under the pattern
The Energy Management System that can carry out coordinating control to marine wind electric field power grid and island microgrid need to be configured.
The 220kV switches that marine wind electric field power grid and continental Grid are connected are closed (101,102), marine wind electric field power grid with
The 35kV switches (203,206) that island microgrid is connected are closed.
Island microgrid is in the pattern that is incorporated into the power networks, and the 35kV switches (207) being connected with marine wind electric field are closed.Island is micro-
The diesel-driven generator that is configured in power grid, micro- gas turbine do not put into operation as cold standby power supply；Island wind turbine and photovoltaic system
Access island microgrid system；Energy-storage system can choose whether to put into according to actual demand.Island microgrid construction is just like seawater
Adjustable power load such as desalination, hydrogen manufacturing.
When continental Grid needs marine wind electric field power grid to participate in peak-frequency regulation, the grid connection capacity of marine wind electric field power grid needs
Meet continental Grid scheduling requirement, at this point, the electric energy that marine wind electric field can be sent out is more than scheduling requirement capacity and the micro- electricity in island
The sum of net base load capacity.The power generation capacity of marine wind electric field is such as limited by shutting down wind turbine mode, it will cause to clean
The energy is discarded.In the present invention in this mode, island microgrid can regard the adjustable load of marine wind electric field as, by unified
The Energy Management System of configuration is instructed according to dispatching of power netwoks, coordinates the deferrable load in control marine wind electric field and island microgrid
And energy storage device, by adjustable power load using the extra electric energy of marine wind electric field, extra electric energy can also be stored in energy storage dress
In putting.The pattern can utilize offshore wind farm clean energy resource to greatest extent, make maximization of economic benefit.
(4) marine wind electric field is connected with island microgrid, and marine wind electric field is disengaged with bulk power grid, and island microgrid is as sea
The emergency standby power of upper wind power plant provides emergency power supply pattern from island microgrid to marine wind electric field.
In this mode, marine wind electric field power grid due to typhoon or sends out extra large cable failure and continental Grid disengagement, at this time wind
Machine can not generate electricity, and the 35kV switches (203,206) being connected with island microgrid are closed.
The 35kV switches (207) that island microgrid is connected with marine wind electric field power grid are closed.The diesel oil hair being configured in island
The stabilized power sources such as motor, micro- gas turbine put into operation；Island wind turbine and photovoltaic system access island microgrid system；Energy storage system
System can choose whether to put into according to actual demand.The electric energy that island microgrid is sent out is in addition to island internal loading needs are met, through 35kV
Connection island extra large cable is sent to offshore boosting station 35kV busbares, and station electricity consumption and emergency power supply are provided for marine wind electric field.
Marine wind electric field of the present invention combines hair each embodiment of electric power system with island microgrid, and island microgrid can be used as sea
The deferrable load of upper wind power plant by building deferrable load (such as sea water desalination, hydrogen manufacturing) in island microgrid, may be such that sea
The operation of upper wind power plant is more flexible, and convenient for meeting the peak-frequency regulation requirement of power grid, and island microgrid can be used as sea turn
The emergency auxiliary power of electric field so as to reduce the configuration of offshore boosting station diesel-driven generator, reduces equipment investment and booster stations is used
Steel amount.When marine wind electric field loses contact with main power grid during typhoon, island microgrid can power to offshore boosting station, provide
Wind turbine is combated typhoon yaw and variable pitch power supply.
Each technical characteristic of embodiment described above can be combined arbitrarily, to make description succinct, not to above-mentioned reality
It applies all possible combination of each technical characteristic in example to be all described, as long as however, the combination of these technical characteristics is not deposited
In contradiction, it is all considered to be the range of this specification record.
Embodiment described above only expresses the several embodiments of the present invention, and description is more specific and detailed, but simultaneously
It cannot therefore be construed as limiting the scope of the patent.It should be pointed out that those of ordinary skill in the art are come
It says, without departing from the inventive concept of the premise, various modifications and improvements can be made, these belong to the protection of the present invention
Range.Therefore, the protection domain of patent of the present invention should be determined by the appended claims.
Claims (10)
1. a kind of marine wind electric field combines hair electric power system with island microgrid, which is characterized in that including connection continental Grid
Marine wind electric field power grid connects several first kind island microgrids of the marine wind electric field power grid and connection described first
Several second class island microgrids of class island microgrid；
The marine wind electric field power grid includes at least two power generation transmission of electricity modules；It is described power generation transmission of electricity module include transmission of electricity module,
Electricity generation module；One end of the transmission of electricity module connects the continental Grid by the first single busbar, and the other end passes through sectionalized busbar
The corresponding electricity generation module, the first kind island microgrid are connected respectively.
2. marine wind electric field according to claim 1 combines hair electric power system with island microgrid, which is characterized in that described
First kind island microgrid includes first kind island step-down transformer, first kind island load blocks, the second single busbar and the
Three single busbars；
One end of first kind island step-down transformer connects second single busbar, the other end passes through the third single busbar
Connect first kind island load blocks；
Second single busbar connects the sectionalized busbar by the first submarine cable, and described the is connected by the second submarine cable
Two class island microgrids.
3. marine wind electric field according to claim 2 combines hair electric power system with island microgrid, which is characterized in that described
First kind island microgrid further includes power generator；
The power generator connects the third single busbar, first kind island load blocks.
4. marine wind electric field according to claim 3 combines hair electric power system with island microgrid, which is characterized in that described
Power generator includes connecting island wind turbine power generation unit, diesel generation unit and the photovoltaic generation list of the third single busbar
Member；The diesel generation unit, the photovoltaic generation unit connect first kind island load blocks respectively.
5. marine wind electric field according to claim 3 combines hair electric power system with island microgrid, which is characterized in that described
Island microgrid further includes energy-storage module；
The energy-storage module connects the power generator, first kind island load blocks and the third single busbar.
6. the marine wind electric field according to claim 2 to 5 any one combines hair electric power system with island microgrid, special
Sign is that first kind island step-down transformer is 35KV/10KV types step-down transformer or 35KV/400V type downconverters
Device.
7. marine wind electric field according to claim 6 combines hair electric power system with island microgrid, which is characterized in that described
Second class island microgrid includes the second class island step-down transformer, the second class island load blocks, the 4th single busbar and the
Five single busbars；
One end of the second class island step-down transformer connects the 4th single busbar, the other end passes through the 5th single busbar
Connect the second class island load blocks；
4th single busbar connects second single busbar by third submarine cable.
8. marine wind electric field according to claim 1 combines hair electric power system with island microgrid, which is characterized in that described
Electricity generation module includes Wind turbines unit；
The Wind turbines unit connects the transmission of electricity module by the sectionalized busbar.
9. marine wind electric field according to claim 8 combines hair electric power system with island microgrid, which is characterized in that described
Module of transmitting electricity includes main transformer；
One end of the main transformer connects the continental Grid by the first single busbar, and the other end passes through the sectionalized busbar point
The corresponding Wind turbines unit, the first kind island microgrid are not connected.
10. marine wind electric field according to claim 9 combines hair electric power system with island microgrid, which is characterized in that institute
Main transformer is stated as 220KV/35KV type main transformers.
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