CN107394831A - A kind of harbour alternating current-direct current series-parallel connection power distribution network and its integrated dispatch management-control method - Google Patents
A kind of harbour alternating current-direct current series-parallel connection power distribution network and its integrated dispatch management-control method Download PDFInfo
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- CN107394831A CN107394831A CN201710758390.2A CN201710758390A CN107394831A CN 107394831 A CN107394831 A CN 107394831A CN 201710758390 A CN201710758390 A CN 201710758390A CN 107394831 A CN107394831 A CN 107394831A
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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
- H02J5/00—Circuit arrangements for transfer of electric power between ac networks and dc networks
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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
- H02J1/00—Circuit arrangements for dc mains or dc distribution networks
- H02J1/10—Parallel operation of dc sources
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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
- H02J3/28—Arrangements for balancing of the load in a network by storage of energy
- H02J3/32—Arrangements for balancing of the load in a network by storage of energy using batteries with converting means
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- H02J3/383—
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- H02J3/386—
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E10/00—Energy generation through renewable energy sources
- Y02E10/50—Photovoltaic [PV] energy
- Y02E10/56—Power conversion systems, e.g. maximum power point trackers
-
- 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
The invention discloses a kind of harbour alternating current-direct current series-parallel connection power distribution network and its integrated dispatch management-control method, belongs to harbour and matches somebody with somebody electricity consumption and distribution automation field.The present invention includes total let-down stations, divide transformer station or Switching Station and each distribution subsystem, the multichannel feeder line of total let-down stations is through dividing transformer station or Switching Station to provide AC power with net system to be each, the distribution subsystem includes bank electricity subsystem, gantry crane subsystem, field bridge subsystem, electric charging station subsystem for harbour electric trailer, new energy subsystem and production and living subsystem, each dc bus for building each distribution subsystem using AC distribution transformer and AC/DC current transformers with net system, protection switch is interconnected by direct current between the dc bus of each distribution subsystem and carries out direct current interconnection；There is multistage dc bus inside distribution subsystem, interconnecting protection switch by direct current between multistage dc bus carries out direct current interconnection.The present invention can realize the optimization power supply and integrated dispatch management and control of harbour power distribution network.
Description
Technical field
The invention belongs to harbour to match somebody with somebody electricity consumption and distribution automation field, and in particular to a kind of harbour alternating current-direct current series-parallel connection power distribution network
And its integrated dispatch management-control method.
Background technology
Current harbour with can equipment be mainly bank/field bridge etc. vertically the horizontal implement such as implement, trailer, reach port
Ship, auxiliary production kind equipment and life kind equipment etc..Bank/field bridge has progressively carried out oil and has changed electricity at present, reduces to environment shadow
The degree of sound and carbon emission, meet the development orientation at green harbour.But reach port ship and trailer largely still use fossil energy
As fuel, environmental pollution and carbon emission are in more serious situation, have had a strong impact on the Green Process at harbour.
As green harbour practice importance, stop port ship be powered using bank electricity, harbour trailer use it is electronic
Trailer will further improve ratio of the electric energy in harbour energy, reduce the proportion of pollution and carbon emission, improve the green port at harbour
Mouthful opinion rating, lift environmental friendliness, resource utilization and the capability of sustainable development at harbour, finally accomplish port development with
The utilization of resources, the coordinating and unifying of environmental protection.
Power Consumption Load of Port largely belongs to two stage loads, need to ensure that its reliable and high efficiency power, harbour power distribution network are usual
It is powered using AC distribution net.However, following limitation be present using the harbour power distribution network of AC distribution mode：1st, harbour
It is higher to exchange the load simultaneity factor design load of distribution, causes distribution design nargin larger, distribution capacity-load ratio (capacity and the ratio of load
Rate) it is larger, the basic charge as per installed capacity at the harbour adjusted using the underlay capacity electricity charge is higher；2nd, electricity consumption is simultaneously in the actual moving process of harbour
Rate is relatively low, and Partial Jobs utilization rate of equipment and installations is low；3rd, with the popularization of bank electricity and electric trailer, part harbour distribution capacity, which exists, to be increased
The demand of appearance；4th, the access of AC distribution net and the consumption new energy such as photovoltaic mainly use AC-DC-AC modes, exist it is uneconomical with
The loss of multiple links；5th, electricity consumption load factor is low, and the distribution transformer proportion of goods damageds are higher；6th, harbour power distribution network is difficult to transport side by side
OK, Peak power use can not be successfully managed, while the lifting of reliability faces bottleneck；7th, power distribution network power load in harbour is big, short circuit
Fault degree is serious；8th, there is certain power quality problem in harbour power distribution network；9th, power network controllability is poor, and trend is consolidated by loop
There is impedance decision, rational management can not be realized.
From the perspective of harbour facilities, problems with is also faced with：1st, during harbour service, a large amount of randomness Large Copacity impacts
Property load input, its power effective power flow present rapid fluctuations；2nd, when foreland/field bridge potential energy feedback is mainly used using system
The mode of energy storage feedback, energy storage cost of investment is high, payoff period length；3rd, bank/field bridge potential energy feedback is needed using the recovery potential energy of system
By passing in and out the link of energy storage, certain unsteady flow loss be present；4th, existing Energy Saving for Distribution Transformer grade is relatively low, and open circuit loss is big
The problem of it is also more prominent.
The content of the invention
The present invention goal of the invention be：The limitation faced for existing harbour power distribution network and the development at green harbour need
Ask, propose a kind of harbour alternating current-direct current series-parallel connection power distribution network and its integrated dispatch management-control method, to realize that the optimization of harbour power distribution network supplies
Electricity and integrated dispatch management and control, lift the environmental friendliness and resource utilization at harbour, promote the development at green harbour.
In order to realize foregoing invention purpose, harbour alternating current-direct current series-parallel connection power distribution network of the invention, the technical scheme of use is：Bag
Total let-down stations, point transformer station or Switching Station and each distribution subsystem are included, the multichannel feeder line of total let-down stations is through dividing transformer station
Or Switching Station provides AC power to be each with net system, the distribution subsystem include bank electricity subsystem, gantry crane subsystem,
Field bridge subsystem, electric charging station subsystem, new energy subsystem and production and living subsystem for harbour electric trailer, it is special
Sign is：Each net system of matching somebody with somebody builds the straight of each distribution subsystem using AC distribution transformer and AC/DC current transformers
Bus is flowed, interconnecting protection switch by direct current between the dc bus of each distribution subsystem carries out direct current interconnection；With Department of Electronics
System is internal multistage dc bus, and interconnecting protection switch by direct current between multistage dc bus carries out direct current interconnection.
Above-mentioned technical proposal is further characterized by：It is described match somebody with somebody net system in a set of AC/DC current transformers be one or
It is multiple to provide public direct-current power supply with electric loading.
Above-mentioned technical proposal is further characterized by：The gantry crane subsystem or field bridge subsystem are that two-way controllable type is straight
Streaming potential feedback system, the feedback potential energy power using the lifting mechanism in the gantry crane or field bridge for declining operation are made in electricity consumption
Other gantry cranes/or field bridge of industry and the distribution subsystem power supply of direct current interconnection nearby.
Above-mentioned technical proposal is further characterized by：The gantry crane subsystem or field bridge subsystem are two-way concentration unsteady flow
Formula direct current potential energy feedback system, concentrated using the two-way controllable current transformer of commutation inversion integration and the operation of 4 quadrants as AC/DC
Current transformer, a set of AC/DC concentrate current transformer to be powered by providing common DC bus mode for multiple gantry cranes or field bridge, each gantry crane
Or the DC/AC frequency converters in the bridge of field are connected on common DC bus, feedback current transformer is multiplexed the raising in each gantry crane or field bridge
AC/DC corresponding to the DC/AC frequency converters of mechanism and each gantry crane or field bridge concentrates current transformer, and each gantry crane or field bridge configure photovoltaic on the spot
Current transformer.
Above-mentioned technical proposal is further characterized by：The gantry crane subsystem or field bridge subsystem are two-way unsteady flow on the spot
Formula direct current potential energy feedback system, each gantry crane or field bridge install feedback AC/DC unsteady flows on the spot on the basis of AC/DC rectifiers are configured
The dc bus of device and photovoltaic converter, gantry crane subsystem or field bridge subsystem interconnects, the DC/AC frequency conversions in each gantry crane or field bridge
Device is connected on dc bus.
Above-mentioned technical proposal is further characterized by：The gantry crane subsystem or field bridge subsystem are two-way disperse conversion
Formula direct current potential energy feedback system, the two-way controllable current transformer using commutation inversion integration and the operation of 4 quadrants disperse as AC/DC
Current transformer, a set of AC/DC disperse conversions device provide DC bus-bar voltage, gantry crane subsystem or field bridge for a gantry crane or field bridge
The dc bus of system is interconnected, and the DC/AC frequency converters in each gantry crane or field bridge are connected on dc bus, the multiplexing of feedback current transformer
AC/DC disperse conversion devices corresponding to the DC/AC frequency converters and each gantry crane or field bridge of each gantry crane or the lifting mechanism in the bridge of field, each bank
Bridge or field bridge configure photovoltaic converter on the spot.
Above-mentioned technical proposal is further characterized by：The electric charging station subsystem for harbour electric trailer, adopt
With photovoltaic generating system for public direct-current side formula, is built on the spot, photovoltaic generating system is carried out based on distributed DC/DC current transformers
Maximal power tracing, generated output confluxes in DC side accesses electric charging station subsystem by direct current interconnection circuit.
Above-mentioned technical proposal is further characterized by：The direct current interconnection protection switch adds isolation using dc circuit breaker
Switch, or fuse add disconnecting switch.
Accordingly, it is suitable for the integrated dispatch management-control method of harbour alternating current-direct current series-parallel connection power distribution network, its technical scheme, including
Harbour power distribution network level and distribution subsystem level two-level scheduler management and control, wherein：
The harbour power distribution network level dispatches management and control, comprises the following steps：The work(more than needed of each distribution subsystem is calculated first
Rate PSourceAnd load Pload；For power margin PSourceWith its load PloadDifference be less than or equal to 0 distribution subsystem, using with regard to Horizon
Weighing apparatus strategy dissolves the photovoltaic power and direct current feedback potential energy power of each distribution subsystem according to nearby principle in DC side；For richness
Remaining power PSourceWith its load PloadDifference be more than 0 distribution subsystem, then further calculate interconnection each distribution subsystem reality
Border demand power PDemand, and judge the power margin P of distribution subsystemSourceWith load PloadDifference whether be less than or equal to actual demand
Power PDemand, if it is, by controlling AC/DC current transformers by vacancy active power from exchange distribution effluent to DC side, use
Work(is provided with nearby principle control turn and flows to other distribution subsystems, and utilizes each distribution subsystem of load balancing optimization from exchange
Effective power flow from effluent to DC side, otherwise, then using load balancing by PSource-Pload-PDemandValue to grid side convey, pass through
Active power more than needed is matched somebody with somebody net side by control AC/DC current transformers from DC side flow direction exchange；
The distribution subsystem level dispatches management and control, comprises the following steps：First, the photovoltaic power of distribution subsystem is calculated
PpvAnd direct current feedback potential energy power PPotential energy, and judge photovoltaic power PpvAnd direct current feedback potential energy power PPotential energyIt is negative whether sum is more than
Lotus Pload, if it is, dissolving photovoltaic power P in DC side according to principle on the spot and nearby principlepvAnd direct current feedback potential energy work(
Rate PPotential energyLoad P in sumloadPart, and using energy regenerative equilibrium by Ppv+PPotential energy-PloadValue to grid side convey, pass through control
Active power more than needed is matched somebody with somebody net side by AC/DC current transformers processed from DC side flow direction exchange, such as runs into AC//DC unsteady flows in course of conveying
Device failure, then direct current feedback potential energy by resistance consumption or is stopped into feedback；If photovoltaic power PpvAnd direct current feedback potential energy work(
Rate PPotential energySum is not more than load Pload, then according to principle on the spot and nearby principle in DC side consumption photovoltaic power PpvAnd direct current
Feedback potential energy power PPotential energy, and load balancing is utilized by Pload-Ppv-PPotential energyValue conveyed by the lateral DC side of power network, pass through control
Vacancy active power is flowed to DC side by AC/DC current transformers from AC.
The above method is further characterized by：AC/DC current transformers in each distribution subsystem use active-DC voltage
Distributed droop control strategy, without load power calculate and energy regenerative power calculation in the case of, by each distribution subsystem
Calculating and optimization pro rate are overlapped with electrical power in real time, obtains the active desired value of droop control, in control direct current
The Balance route of active power is realized on the basis of pressure.
Having the beneficial effect that relative to prior art of the invention：
Compared with the regular alternating current distribution system of harbour, the beneficial effect of harbour alternating current-direct current series-parallel connection power distribution network of the invention is main
It is embodied in：1) regular alternating current distribution system uses fanout operation, and load simultaneity factor need to be according to Specification Design, distribution design value nargin
It is higher.And the present invention uses direct current paired running, each bus load is set by all inlet wire balanced power supplies, load simultaneity factor and distribution
Evaluation nargin can be reduced suitably, and the design capacity and cost of main transformer and main convertor also suitably reduce；2) regular alternating current distribution side
Formula can not Electromagnetic coupling, and the present invention can Electromagnetic coupling, effectively improve the flexibility of the distribution method of operation；3) regular alternating current distribution
The long-term light running of distribution transformer, less efficient in mode.And the present invention can utilize load balancing technical optimization distribution transformer
The load factor of device, so as to lift the operational efficiency of transformer；4) photovoltaic need to pass through DC/AC current transformers in regular alternating current distribution system
It is grid-connected, increase cost of investment and corresponding loss.And the system such as new energy resources system reusable electric charging station such as photovoltaic of the present invention
AC/DC current transformers are sent out active in DC side on-site elimination to reduce the loss of grid-connected link with investment reduction cost；5) it is conventional
AC distribution mode can only realize the independently-powered of each distribution subsystem, can not realize that region class is powered in the aspect of harbour distribution
Optimization.And the present invention can optimize scheduling to the trend of each distribution subsystem, so as to realize area in the aspect in harbour distribution
Domain power supply optimization management and control；6) by the way of direct current interconnection, Reliability of Power Supplying Net Work is further lifted the present invention, can pin
The sudden load of opposite bank/field bridge realizes peak valley balanced action, improves distribution utilization rate.
In the present invention, two-way controllable DC potential energy feedback system has the beneficial effect that：1) regular alternating current distribution side
The potential energy feedback system of formula need to be directed to each bank/field bridge and configure a set of potential energy feedback device；And present invention structure bank/field bridge is straight
Streaming potential feedback system, can save the cost of investment of DC/DC current transformers and energy storage, while avoid potential energy power from passing in and out energy storage device
Running wastage, and the direct current potential energy feedback system can realize DC side on the spot, nearby dissolve potential energy power, and can control it is superfluous
Complementary work rate flows into alternating current net side, while potential energy feedback power direct current on-site elimination between realizing bank/field bridge, realizes redundancy work(
The feedback grid and Optimized Operation of rate；2) be directed to new construction concentration variable flow type and disperse conversion formula, feedback with AC/DC with it is whole
Stream power supply is multiplexed with AC/DC, commutation inversion integration, effectively reduces cost of investment, has preferably economy；3) using public
The mode of common DC bus, is easy to the access of the dc sources such as photovoltaic and DC load, and photovoltaic and feedback power can match somebody with somebody in direct current
Dissolved on the spot, nearby in net, avoid the bidirectional power loss of potential energy storage and release, efficiency is more excellent；4) rectification of bank/field bridge
Power and direct current feedback power (active) are controllable, and the Optimized Operation using efficiency as priority target in wider distribution can be achieved；
5) uncontrollable rectifier mode is concentrated compared to direct current, the power supply reliability of disperse conversion formula is higher, some AC/DC current transformer event in system
System loading can be shared by remaining current transformer after barrier, avoid the powerup issue after concentrating rectification current transformer failure；6) system without
DC/DC current transformers, save construction cost；7) due to direct current interconnection and power it is controllable, direct current supply line can paired running, for
New construction, while its distribution design rate can according to it is actual it is appropriate reduce, so as to reduce setting for distribution transformer and current transformer
Count capacity and cost；8) because direct current feedback potential energy power is controllable and direct current interconnected operation arranged side by side, feed-back type current transformer on the spot
Distribution design simultaneity factor can be according to actual appropriate reduction, and feedback current transformer is designed to when being directed to transformation harbour so as to reduce
This.
In the present invention, the beneficial effect of electric charging station mainly has：1) by the way of common DC bus, it is easy to photovoltaic system
The access of system；2) the AC/DC current transformers of photovoltaic system multiplexing electric charging station, power margin can be incorporated to exchange distribution consumption, drop
The low cost of investment of this part of the AC/DC of photovoltaic system, have and preferably build economy and performance driving economy；3) photovoltaic system
The generated output of system can in electric charging station direct current distribution on-site elimination, avoid the grid-connected of DC/AC current transformers in usual manner
Link is lost, and power usage efficiency is more excellent；4) electric charging station direct current interconnects, can side by side and Electromagnetic coupling, while distribution design
Rate is low, and distribution system cost is low, can be realized in the case of original port area's not dilatation.
The beneficial effect of the scheduling management-control method of the present invention is：It is equal that the inventive method is based on load balancing technology, energy regenerative
Weighing apparatus technology, and direct current on the spot, dissolve technology nearby, electric energy electric charging station, bank/field bridge, bank electricity, photovoltaic in the area of port can be achieved
Optimized Operation and high efficiency flow between power station etc..
Brief description of the drawings
Fig. 1 is the harbour alternating current-direct current series-parallel connection distribution network system Organization Chart of embodiment 1.
Fig. 2 is the harbour alternating current-direct current series-parallel connection distribution network system Organization Chart of embodiment 2.
Fig. 3 is the harbour alternating current-direct current series-parallel connection distribution network system Organization Chart of embodiment 3.
Fig. 4 is two-way concentration variable flow type direct current potential energy feedback system schematic diagram.
Fig. 5 is the two-way direct current of variable flow type on the spot potential energy feedback system schematic diagram.
Fig. 6 is two-way disperse conversion formula direct current potential energy feedback system schematic diagram.
Fig. 7 is to match somebody with somebody net system schematic diagram based on battery type electric trailer fast charge pattern.
Fig. 8 is to match somebody with somebody net system schematic diagram based on what battery type electric trailer changed power mode.
Fig. 9 is to match somebody with somebody net system schematic diagram based on super capacitor formula electric trailer fast charge pattern.
Figure 10 is to match somebody with somebody net system schematic diagram based on slide wire power supply electric trailer pattern.
Figure 11 is the scheduling management-control method flow chart suitable for harbour alternating current-direct current series-parallel connection power distribution network.
Embodiment
The present invention is described in further detail with reference to case study on implementation and accompanying drawing.
Embodiment 1：
The present embodiment includes a kind of harbour alternating current-direct current series-parallel connection power distribution network and its integrated dispatch management-control method, and wherein harbour is handed over straight
Series-parallel connection power distribution network is flowed, available for the upgrading of existing port greenization, the planning and designing at newly-built green harbour, the optimization of harbour power distribution network
And transformation, integrated dispatch management-control method is then with the spot/direct current source power consumption nearby, load balancing technology, energy regenerative equilibrium skill
Art dispatches management-control method for the system multilayer level of main body, suitable for the harbour alternating current-direct current series-parallel connection power distribution network of the present embodiment.This implementation
Example also proposes two-way controllable direct current potential energy feedback system and its control strategy for new port and harbour transformation respectively, can be used for
The efficient potential energy feedback in harbour and balance.In addition, the present embodiment proposes that photovoltaic distribution is complementary for four kinds of different electric trailer types
Electric charging station distribution network systems, available for harbour electric trailer transformation and its electric charging station distribution design.
As shown in figure 1, the harbour alternating current-direct current series-parallel connection power distribution network of the present embodiment, its system architecture is mainly by being always depressured institute/stand
(not shown directly in Fig. 1), point transformer station or Switching Station (not shown directly in Fig. 1), each distribution subsystem and AC/DC circuit
Form.The multichannel feeder line of total let-down stations is through dividing transformer station or Switching Station (to press and hand in i.e. respectively to provide AC power with net system
Flow into line), if Switching Station can be 10kV inlet wire multichannel 10kV outlets.Each distribution subsystem is actual according to its implementation and harbour
Distribution, each organic interconnection of distribution subsystem, so as to form the system architecture of harbour alternating current-direct current series-parallel connection power distribution network are interconnected using direct current.
Each distribution subsystem carries out subregion according to functional localization, mainly includes：Bank electricity subsystem, gantry crane subsystem, Chang Qiao
Subsystem, the electric charging station subsystem for harbour electric trailer, new energy subsystem (predominantly photovoltaic system and wind-powered electricity generation system
System) and production and living subsystem etc..
Interconnection between each distribution subsystem is configured to direct current interconnection distribution.As shown in figure 1, using AC distribution transformer and
AC/DC current transformers build the dc bus (DC bus) of each distribution subsystem, each distribution subsystem (bank electricity system in Fig. 1,
Gantry crane system, charging system, field bridge system, generation living system, energy-storage system, photovoltaic system and wind power system etc.) direct current
Protection switch is interconnected between bus by direct current to be interconnected.Because the inlet wire AC of each distribution subsystem interconnects, outlet DC side
Interconnection, therefore the Electromagnetic coupling of feasible system and interconnection paired running.When being interconnected using direct current, direct current interconnection protection switch can adopt
Add the mode of disconnecting switch with dc circuit breaker plus disconnecting switch, or fuse.
The inside of each distribution subsystem is also using the direct current interconnection power supply (DC of two gantry cranes in such as Fig. 1 in gantry crane system
Protection switch is interconnected by direct current to interconnect, and for example lead between the DC bus of each charge position in Fig. 1 in charging system between bus
Cross the interconnection of direct current interconnection protection switch), the mode of power supply mainly has bus section power supply, cable run (containing cable drum) power supply
And slide wire power supply etc..During direct current interconnection power supply, direct current interconnection protection switch can be normally closed, and distribution can realize cyclization and side by side fortune
OK.When interconnecting power supply using direct current, direct current interconnection protection switch can add disconnecting switch, or fuse to add using direct-current short circuit device
The mode of disconnecting switch.
Each distribution subsystem concentrates rectification or the determination of scattered rectifier system to need using rectification or scattered rectifier system is concentrated
Comprehensive Design is carried out according to distribution capacity, power supply reliability, efficiency.
Rectifier system is concentrated to refer to, a set of AC/DC current transformers use electric loading (such as multiple bridges or multiple chargings to be multiple
Position) public direct-current power supply is provided, AC/DC current transformers use module/equipment parallel way, advantage be guarantee current transformer efficiency and
Transformer efficiency, as a set of AC/DC current transformers in charging system in Fig. 1 provide public direct-current power supply for multiple charge positions, again
As a set of AC/DC current transformers in the bridge system of Fig. 1 midfields provide public direct-current power supply for multiple bridges.Public direct-current side can use
Dc bus segmentation, direct current cables reel, direct current trolley mode carry out direct current interconnection.
Scattered rectifier system refers to, a set of AC/DC current transformers are one with electric loading (such as single field bridge or single charging
Position) public direct-current power supply is provided, AC/DC current transformers use single module/wired in parallel mode, and advantage is to improve power supply reliability
And flexibility, power network controllability, while realize the Optimized Operation using efficiency as priority target using load balancing technology.It is public
DC side can take the modes such as dc bus, direct current trolley to carry out direct current interconnection.
It should be noted that for using the more economic equipment of AC distribution in each distribution subsystem, can use existing
Supplement of the AC distribution as direct current interconnection distribution system in technology, as the direct ac cables of 10kV/690V move bridge crane, bridge to
Hang internal or AC-DC-AC structure.
In the present embodiment, gantry crane/field bridge subsystem is two-way controllable DC potential energy feedback system, under its working mechanism is
Drop operation gantry crane/field bridge by the feedback potential energy power of its lifting mechanism to interconnection straight-flow system in be in electricity consumption operation other
Gantry crane/field bridge, the distribution subsystem power supply of direct current interconnection nearby.The allocation plan master of two-way controllable DC potential energy feedback system
Have 3 kinds, respectively two-way concentration variable flow type direct current potential energy feedback system, the two-way direct current potential energy feedback system of variable flow type on the spot and
Two-way disperse conversion formula direct current potential energy feedback system, respectively as shown in Fig. 4~Fig. 6 (in figure by taking the bridge of field as an example).
Two-way concentration variable flow type direct current potential energy feedback system, as shown in Figure 4.For new port, AC/DC concentrates current transformer
Public direct-current voltage is provided using two-way controllable current transformer (commutation inversion integration, the operation of 4 quadrants), a set of AC/DC, which is concentrated, to be become
Stream device is powered by providing common DC bus mode for multiple gantry cranes/field bridge, each DC/AC frequency converters and is connect in gantry crane/field bridge
In on dc bus, the DC/AC frequency converters and AC/DC of feedback current transformer multiplexing lifting mechanism concentrate current transformer.Each gantry crane/field
Bridge can also configure photovoltaic converter on the spot (not shown in Fig. 4).
The two-way direct current of variable flow type on the spot potential energy feedback system, as shown in Figure 5.Transformed for existing harbour, due to existing
There are the built AC/DC rectifiers in harbour (predominantly uncontrollable rectifier), therefore each installation feedback AC/DC on each gantry crane/field bridge
Current transformer and photovoltaic converter, DC side are interconnected by bus, cable drum or direct current trolley.
Two-way disperse conversion formula direct current potential energy feedback system, as shown in Figure 6.For new port, AC/DC disperse conversion devices
Using two-way controllable current transformer (commutation inversion integration, the operation of 4 quadrants), a set of AC/DC disperse conversions device is a gantry crane/field
Bridge provides DC bus-bar voltage, and each DC/AC frequency converters are connected on dc bus in gantry crane/field bridge, and feedback current transformer is multiplexed
Rise the DC/AC frequency converters and AC/DC disperse conversion devices of mechanism.Each gantry crane/field bridge configures photovoltaic converter on the spot.
The basic scheduling strategy of two-way controllable DC potential energy feedback system is：First, photovoltaic power and direct current feedback gesture
Energy power carries out on-site elimination based on dc bus in direct current distribution system and dissolves (closing on distribution subsystem) nearby；Its
Secondary, when photovoltaic power and direct current feedback potential energy power are more than demand power, unnecessary potential energy power is by AC/DC current transformers from straight
Effluent is flowed to AC distribution net side, and otherwise, vacancy flows to DC load side by AC/DC current transformers from AC distribution net side.
In the present embodiment, the electric charging station subsystem used in the electric trailer of harbour is public direct-current side formula, in bulk goods code
The first-class place structure photovoltaic generating system for possessing photovoltaic construction condition, photovoltaic generating system are based on distributed DC/DC current transformers
Maximal power tracing (MPPT) is carried out, generated output confluxes in DC side accesses electric charging station by direct current interconnection circuit.For
Different electric trailer types, electric charging station subsystem includes four kinds of forms, as follows respectively：
The fast charging system of battery type electric trailer, as shown in Figure 7.Electric trailer battery drives into charging after electricity bottom line is reached
Station is charged, and AC/DC current transformers are using two-way controllable centralized current transformer (commutation inversion integration, 4 quadrants in electric charging station
Operation) common DC bus is provided, the multiple electric trailer DC/DC charge positions for being and connecing thereon are powered.
Battery type electric trailer changes electric system, as shown in Figure 8.Electric trailer battery drives into fill after electricity bottom line is reached and changed
Power station carries out battery altering using electric hand arm is changed, and AC/DC current transformers are (whole using two-way controllable centralized current transformer in electric charging station
Flow inversion integration, the operation of 4 quadrants) common DC bus is provided, the multiple battery DC/DC charge positions for being and connecing thereon supply
Electricity.
The fast charging system of super capacitor formula electric trailer, as shown in Figure 9.Super capacitor electric trailer reaches specified charge position
Carry out fast charge when putting, in electric charging station AC/DC current transformers using two-way controllable centralized current transformer (commutation inversion integration, 4 as
Limit operation) common DC bus is provided, provide high-power charge power in short-term for super capacitor electric trailer.
Mixed type electric trailer power supply system of sliding contact line, as shown in Figure 10.AC/DC current transformers are using two-way in electric charging station
Controllable centralized current transformer (commutation inversion integration, the operation of 4 quadrants) provides public direct-current trolley, for using super capacitor and
The mixed type electric trailer of boosting battery provides driving power and standby charge power.
The present embodiment, for above-mentioned harbour alternating current-direct current series-parallel connection power distribution network, by harbour power distribution network level and subsystem level two
Individual level carries out integrated dispatch management and control, and this method is based on load balancing technology, energy regenerative balancing technique, and direct current is on the spot, nearby
Consumption technology, Optimized Operation and height of the electric energy in the area of port between electric charging station, bank/field bridge, bank electricity, photovoltaic plant etc. can be achieved
Effect flowing.
In harbour power distribution network level, preferentially according to nearby principle DC side dissolve each distribution subsystem photovoltaic power,
The direct current source power such as direct current feedback potential energy power, when direct current source power is more than actual demand power, by controlling AC/DC unsteady flows
Active power more than needed is matched somebody with somebody net side by device from DC side flow direction exchange, otherwise, by controlling AC/DC current transformers by vacancy active power
From exchange distribution effluent to DC side, shown in its step such as Figure 11 (a).Specifically：
The power margin P of each distribution subsystem is calculated firstSourceAnd load Pload.For power margin PSourceWith its load Pload
Difference be less than or equal to 0 distribution subsystem, then using in-situ balancing strategy, electronics is respectively matched somebody with somebody in DC side consumption according to nearby principle
The direct current source power such as the photovoltaic power of system, direct current feedback potential energy power, now without turning to be provided with work(.
For power margin PSourceWith its load PloadDifference be more than 0 distribution subsystem, then further calculate interconnection it is each
The actual demand power P of distribution subsystemDemand, and judge the power margin P of distribution subsystemSourceWith load PloadDifference it is whether small
In equal to actual demand power PDemand, if it is, by controlling AC/DC current transformers that vacancy active power is matched somebody with somebody into net side from exchange
DC side is flowed to, uses to turn to be provided with work(with nearby principle control and flows to other distribution subsystems, and it is each using load balancing optimization
Distribution subsystem flows to the effective power flow of DC side from AC, otherwise, then using load balancing by PSource-Pload-PDemandValue to
Grid side conveys, i.e., by controlling AC/DC current transformers that active power more than needed is matched somebody with somebody into net side from DC side flow direction exchange.
In subsystem level, by taking the bridge of field as an example, each direct current supply line is preferential according to just to interconnect juxtaposition operation
Ground/nearby principle dissolves the direct current source power such as photovoltaic power, the direct current feedback potential energy power of each field bridge in DC side, works as DC source
When power is more than load, active power more than needed is flowed to by AC from DC side by energy regenerative Balance route AC/DC current transformers；It is no
Then, vacancy active power is flowed to by DC side from AC by Load balanced control AC/DC current transformers, its step such as Figure 11
(b) shown in.Specifically：
First, the photovoltaic power P of distribution subsystem is calculatedpvAnd direct current feedback potential energy power PPotential energy, and judge photovoltaic power
PpvAnd direct current feedback potential energy power PPotential energyWhether sum is more than load Pload, if it is, being existed according to principle on the spot and nearby principle
DC side consumption photovoltaic power PpvAnd direct current feedback potential energy power PPotential energyLoad P in sumloadPart, it is and balanced using energy regenerative
By Ppv+PPotential energy-PloadValue to grid side convey, i.e., by control AC/DC current transformers by active power more than needed from DC side flow to
Net side is matched somebody with somebody in exchange, and AC//DC current transformer failures are such as run into course of conveying, then by direct current feedback potential energy by resistance consumption or
Stop feedback.
If photovoltaic power PpvAnd direct current feedback potential energy power PPotential energySum is not more than load Pload, then according to principle on the spot
And nearby principle is in DC side consumption photovoltaic power PpvAnd direct current feedback potential energy power PPotential energy, and load balancing is utilized by Pload-
Ppv-PPotential energyValue conveyed by the lateral DC side of power network, i.e., by controlling AC/DC current transformers by vacancy active power from exchange effluent
To DC side.
Because concentration/disperse conversion mode for multiple AC/DC current transformers provides multistage dc bus, each direct current supply line
To interconnect juxtaposition operation, the control strategy and trend that stable coordination DC voltage is needed between its multiple AC/DC current transformer are adjusted
Degree.Therefore, it is using the load balancing based on multiterminal droop control/energy regenerative equilibrium, i.e., each respectively to match somebody with somebody AC/DC current transformers in net system
AC/DC current transformers use the distributed droop control strategy of active-DC voltage, and/energy regenerative power is being calculated without load power
In the case of calculating, each station is overlapped calculating and optimization pro rate with electrical power in real time, obtains the active of droop control
Desired value, so that the Balance route of active power is realized at each station on the basis of DC voltage is controlled.
Compared with the regular alternating current distribution system of harbour, the functionality advantage master of the harbour alternating current-direct current series-parallel connection power distribution network of the present embodiment
It is embodied in：1) regular alternating current distribution system uses fanout operation, and load simultaneity factor need to be abundant according to Specification Design, distribution design value
Spend higher.And the present embodiment uses direct current paired running, each bus load load simultaneity factor and is matched somebody with somebody by all inlet wire balanced power supplies
Electric design load nargin can be reduced suitably, and the design capacity and cost of main transformer and main convertor also suitably reduce；2) regular alternating current is matched somebody with somebody
Electrically can not Electromagnetic coupling, and the present embodiment can Electromagnetic coupling, effectively improve the flexibility of the distribution method of operation；3) it is conventional to hand over
The long-term light running of distribution transformer in distribution system is flowed, it is less efficient.And the present embodiment can utilize load balancing technical optimization
The load factor of distribution transformer, so as to lift the operational efficiency of transformer；4) photovoltaic need to pass through DC/ in regular alternating current distribution system
AC current transformers are grid-connected, increase cost of investment and corresponding loss.And the new energy resources system reusable charging and conversion electric such as photovoltaic of the present embodiment
The AC/DC current transformers for the system such as stand are sent out active in DC side on-site elimination to reduce grid-connected link with investment reduction cost
Loss；5) regular alternating current distribution system can only realize the independently-powered of each distribution subsystem, can not be in the aspect reality of harbour distribution
Existing region class power supply optimization.And the present embodiment can optimize scheduling to the trend of each distribution subsystem, so as to match somebody with somebody at harbour
The aspect of net realizes that block supply optimizes management and control；6) by the way of direct current interconnection, Reliability of Power Supplying Net Work obtains the present embodiment
Further lifting, the sudden load that can be directed to bank/field bridge realize peak valley balanced action, improve distribution utilization rate.
In the present embodiment, the most prominent features and advantage of two-way controllable DC potential energy feedback system are：1) regular alternating current
The potential energy feedback system of distribution system need to be directed to each bank/field bridge and configure a set of potential energy feedback device；And the present embodiment structure bank/
The direct current potential energy feedback system of field bridge, can save the cost of investment of DC/DC current transformers and energy storage, while avoid potential energy power from passing in and out
The running wastage of energy storage device, and the direct current potential energy feedback system can realize DC side on the spot, nearby dissolve potential energy power, again
Redundant power can be controlled to flow into alternating current net side, it is real while potential energy feedback power direct current on-site elimination between realizing bank/field bridge
The feedback grid and Optimized Operation of existing redundant power；2) the concentration variable flow type and disperse conversion formula of new construction are directed to, feedback is used
AC/DC is multiplexed with commutation supply voltage with AC/DC, commutation inversion integration, effectively reduces cost of investment, is had preferably economical
Property；3) by the way of common DC bus, it is easy to the access of the dc sources such as photovoltaic and DC load, photovoltaic and feedback power
It can on the spot, nearby be dissolved in direct current distribution, avoid the bidirectional power loss of potential energy storage and release, efficiency is more excellent；4) bank/
The rectified power and direct current feedback power (active) of field bridge are controllable, can be achieved in wider distribution using efficiency as priority target
Optimized Operation；5) uncontrollable rectifier mode is concentrated compared to direct current, the power supply reliability of disperse conversion formula is higher, some AC/ in system
DC current transformer post-fault systems load can be shared by remaining current transformer, avoid the power supply after concentrating rectification current transformer failure and ask
Topic；6) system DC-free/DC current transformers, construction cost is saved；7) because direct current interconnection and power are controllable, direct current supply line can be simultaneously
Row operation, for new construction, while its distribution design rate can according to it is actual it is appropriate reduce, so as to reduce distribution transformer and
The design capacity and cost of current transformer；8) because direct current feedback potential energy power is controllable and direct current interconnected operation arranged side by side, feedback on the spot
The distribution design simultaneity factor of formula current transformer can be according to actual appropriate reduction, feedback current transformer when being directed to transformation harbour so as to reduce
Design cost.
In the present embodiment, mainly have for the electric charging station advantage of 4 kinds of electric trailers：1) side of common DC bus is used
Formula, it is easy to the access of photovoltaic system；2) power margin, can be incorporated to friendship by the AC/DC current transformers of photovoltaic system multiplexing electric charging station
Distribution consumption is flowed, reduces the cost of investment of this part of the AC/DC of photovoltaic system, has and preferably builds economy and operation warp
Ji property；3) generated output of photovoltaic system can in electric charging station direct current distribution on-site elimination, avoid DC/AC in usual manner
The grid-connected link loss of current transformer, power usage efficiency are more excellent；4) electric charging station direct current interconnects, and can match somebody with somebody side by side and Electromagnetic coupling
Rate is low while electricity design, and distribution system cost is low, can be realized in the case of original port area's not dilatation.
Embodiment 2：
An alternative embodiment of the invention, its system architecture is as shown in Fig. 2 its most technology contents and embodiment 1
In relevant portion it is substantially similar.Difference is, in its charging system, a distribution is shared using multiple AC/DC current transformers
Transformer mode.
Embodiment 3：
An alternative embodiment of the invention, its system architecture is as shown in figure 3, its most technology contents and embodiment 1
In relevant portion it is substantially similar, its distribution subsystem mainly comprising bank electricity system, gantry crane system, field bridge system, using changing electricity
Electric charging station system, photovoltaic system, the production and living system of pattern, but it is configured without wind power system, but with another light
Lie prostrate systematic substitution.Interconnected between each distribution subsystem using DC line, direct current protecting switchs selection and kept apart between system
Close and the mode of DC fuse, direct current protecting switch chooses disconnecting switch and the mode of dc circuit breaker in system.
Harbour electric trailer is changed electrically using battery type electric trailer, and electric charging station system is used for electric trailer battery more
Change and battery charges, design photovoltaic energy system nearby.Electric charging station distribution uses 4 10kV/400V/0.8MVA distribution transformers
The AC/DC current transformers of device and 4 sets of 400V/0.8MVA, there is provided 4 sections of 750V direct current supply bus, AC/DC current transformers use T-shaped 3
Level VSC topologys.228 600V/10.8kW DC/DC charge positions (0.33C rate of charge) are configured simultaneously, are distributed in each segmentation
On dc bus, its topology is using phase-shifting full-bridge or without isolation Buck-boost.Photovoltaic system adds 750V/ using photovoltaic module
36kW DC/DC current transformers, are connected after direct current confluxes with the dc bus of electric charging station, DC line laying distance<3km.Light
Volt system and the direct current protecting of electric charging station system interconnection are switched by the way of fuse adds disconnecting switch, electric charging station system
Interconnection switch between interior multistage dc bus is by the way of disconnecting switch adds dc circuit breaker.
Gantry crane system uses two-way disperse conversion formula direct current potential energy feedback system.A set of AC/DC current transformers are a gantry crane
Direct current supply bus is provided, each DC/AC frequency converters are connected on dc bus in gantry crane, feedback current transformer multiplexing lifting mechanism
DC/AC frequency converters and AC/DC disperse conversion devices.Meanwhile using dc bus or DC line by each gantry crane distribution loop
DC side is interconnected, and standby energy storage is accessed to the straight-flow system of gantry crane.Each gantry crane sets up photovoltaic module and adds 750V/36kW nearby
DC/DC current transformers, each gantry crane is connected with photovoltaic in gantry crane by direct current.Contact in gantry crane system between multistage dc bus
Switch is by the way of disconnecting switch adds dc circuit breaker.
Field bridge system uses two-way concentration variable flow type direct current potential energy feedback system.A set of AC/DC current transformers are public by providing
Common DC bus mode is that multiple bridges are powered, and each DC/AC frequency converters are connected on dc bus in the bridge of field, and feedback current transformer is answered
Current transformer is concentrated with the DC/AC frequency converters and AC/DC of lifting mechanism, each field bridge configures photovoltaic converter on the spot.Every 4 field bridges
1 section of dc bus is shared, is realized between dc bus by way of direct current cables reel adds direct-current short circuit device and disconnecting switch mutually
Connection.
Bank electricity system is interconnected the DC side of bank electricity by the way of public direct-current power supply.Production and living.System
Middle street lamp is by the way of the power supply of DC/DC current transformers.Other production and living loads carry out regular alternating current confession using branch distribution case
Electricity.
Although the present invention is disclosed as above with preferred embodiment, embodiment is not for limiting the present invention's.Not
In the spirit and scope for departing from the present invention, any equivalence changes done or retouching, the protection domain of the present invention is also belonged to.Cause
This protection scope of the present invention should be using the content that claims hereof is defined as standard.
Claims (10)
1. a kind of harbour alternating current-direct current series-parallel connection power distribution network, including total let-down stations, divide transformer station or Switching Station and each distribution subsystem,
The multichannel feeder line of total let-down stations is through dividing transformer station or Switching Station to provide AC power, the distribution with net system to be each
Subsystem include bank electricity subsystem, gantry crane subsystem, field bridge subsystem, the electric charging station subsystem for harbour electric trailer,
New energy subsystem and production and living subsystem, it is characterised in that：It is described each to utilize AC distribution transformer with net system
And AC/DC current transformers build the dc bus of each distribution subsystem, pass through direct current between the dc bus of each distribution subsystem
Interconnect protection switch and carry out direct current interconnection；There is multistage dc bus inside distribution subsystem, pass through between multistage dc bus
Direct current interconnection protection switch carries out direct current interconnection.
2. alternating current-direct current series-parallel connection power distribution network in harbour according to claim 1, it is characterised in that：It is described match somebody with somebody net system in it is a set of
AC/DC current transformers provide public direct-current power supply for one or more with electric loading.
3. alternating current-direct current series-parallel connection power distribution network in harbour according to claim 2, it is characterised in that：The gantry crane subsystem or field bridge
Subsystem is two-way controllable DC potential energy feedback system, utilizes the feedback of the lifting mechanism in the gantry crane or field bridge for declining operation
The distribution subsystem that direct current interconnects to other gantry cranes/in the electricity consumption operation or field bridge and nearby power supply of potential energy power.
4. alternating current-direct current series-parallel connection power distribution network in harbour according to claim 3, it is characterised in that：The gantry crane subsystem or field bridge
Subsystem is two-way concentration variable flow type direct current potential energy feedback system, can using commutation inversion integration and the two-way of 4 quadrants operation
Control current transformer and concentrate current transformer as AC/DC, a set of AC/DC concentration current transformers are multiple by providing common DC bus mode
Gantry crane or field bridge are powered, and the DC/AC frequency converters in each gantry crane or field bridge are connected on common DC bus, the multiplexing of feedback current transformer
AC/DC corresponding to the DC/AC frequency converters and each gantry crane or field bridge of each gantry crane or the lifting mechanism in the bridge of field concentrates current transformer, each bank
Bridge or field bridge configure photovoltaic converter on the spot.
5. alternating current-direct current series-parallel connection power distribution network in harbour according to claim 3, it is characterised in that：The gantry crane subsystem or field bridge
Subsystem is the two-way direct current of variable flow type on the spot potential energy feedback system, each gantry crane or field bridge on the basis of AC/DC rectifiers are configured
Feedback AC/DC current transformers and photovoltaic converter, the dc bus interconnection of gantry crane subsystem or field bridge subsystem, each bank are installed on the spot
DC/AC frequency converters in bridge or field bridge are connected on dc bus.
6. alternating current-direct current series-parallel connection power distribution network in harbour according to claim 3, it is characterised in that：The gantry crane subsystem or field bridge
Subsystem is two-way disperse conversion formula direct current potential energy feedback system, can using commutation inversion integration and the two-way of 4 quadrants operation
Control current transformer and provide dc bus electricity as AC/DC disperse conversion devices, a set of AC/DC disperse conversions device for a gantry crane or field bridge
The dc bus of pressure, gantry crane subsystem or field bridge subsystem interconnects, and the DC/AC frequency converters in each gantry crane or field bridge are connected to direct current
On bus, feedback current transformer is multiplexed each gantry crane or the DC/AC frequency converters of the lifting mechanism in the bridge of field and each gantry crane or field bridge is corresponding
AC/DC disperse conversion devices, each gantry crane or field bridge configure photovoltaic converter on the spot.
7. alternating current-direct current series-parallel connection power distribution network in harbour according to claim 2, it is characterised in that：It is described to be used for harbour electric trailer
Electric charging station subsystem, be adopted as public direct-current side formula, build photovoltaic generating system on the spot, photovoltaic generating system is based on point
Cloth DC/DC current transformers carry out maximal power tracing, and generated output confluxes to fill by the access of direct current interconnection circuit in DC side to be changed
Power station subsystem.
8. according to any described harbour alternating current-direct current series-parallel connection power distribution network of claim 1~7, it is characterised in that：The direct current interconnection
Protection switch adds disconnecting switch, or fuse to add disconnecting switch using dc circuit breaker.
9. a kind of integrated dispatch management-control method suitable for harbour alternating current-direct current series-parallel connection power distribution network, it is characterised in that match somebody with somebody including harbour
Power network level and distribution subsystem level two-level scheduler management and control, wherein：
The harbour power distribution network level dispatches management and control, comprises the following steps：The power margin P of each distribution subsystem is calculated firstSource
And load Pload；For power margin PSourceWith its load PloadDifference be less than or equal to 0 distribution subsystem, using in-situ balancing plan
The photovoltaic power and direct current feedback potential energy power of each distribution subsystem are slightly dissolved in DC side according to nearby principle；For work(of having more than needed
Rate PSourceWith its load PloadDifference be more than 0 distribution subsystem, then further calculate interconnection each distribution subsystem actual need
Seek power PDemand, and judge the power margin P of distribution subsystemSourceWith load PloadDifference whether be less than or equal to actual demand power
PDemand, if it is, by controlling AC/DC current transformers from exchange distribution effluent to DC side, to use vacancy active power with just
Approximately principle control turn is provided with work(and flows to other distribution subsystems, and utilizes each distribution subsystem of load balancing optimization from exchange effluent
To the effective power flow of DC side, otherwise, then using load balancing by PSource-Pload-PDemandValue to grid side convey, pass through control
Active power more than needed is matched somebody with somebody net side by AC/DC current transformers from DC side flow direction exchange；
The distribution subsystem level dispatches management and control, comprises the following steps：First, the photovoltaic power P of distribution subsystem is calculatedpvAnd
Direct current feedback potential energy power PPotential energy, and judge photovoltaic power PpvAnd direct current feedback potential energy power PPotential energyWhether sum is more than load
Pload, if it is, dissolving photovoltaic power P in DC side according to principle on the spot and nearby principlepvAnd direct current feedback potential energy power
PPotential energyLoad P in sumloadPart, and using energy regenerative equilibrium by Ppv+PPotential energy-PloadValue to grid side convey, pass through control
Active power more than needed is matched somebody with somebody net side by AC/DC current transformers from DC side flow direction exchange, such as runs into AC//DC current transformers in course of conveying
Failure, then direct current feedback potential energy by resistance consumption or is stopped into feedback；If photovoltaic power PpvAnd direct current feedback potential energy power
PPotential energySum is not more than load Pload, then according to principle on the spot and nearby principle in DC side consumption photovoltaic power PpvAnd direct current returns
Present potential energy power PPotential energy, and load balancing is utilized by Pload-Ppv-PPotential energyValue conveyed by the lateral DC side of power network, by controlling AC/
Vacancy active power is flowed to DC side by DC current transformers from AC.
10. the integrated dispatch management-control method according to claim 9 suitable for harbour alternating current-direct current series-parallel connection power distribution network, its feature
It is：AC/DC current transformers in each distribution subsystem use the distributed droop control strategy of active-DC voltage, need not
Load power calculate and energy regenerative power calculation in the case of, by each distribution subsystem in real time with electrical power be overlapped calculate and it is excellent
Change pro rate, obtain the active desired value of droop control, the equilibrium of active power is realized on the basis of DC voltage is controlled
Control.
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