CN104333036A - Multi-source coordination control system - Google Patents
Multi-source coordination control system Download PDFInfo
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- CN104333036A CN104333036A CN201410597183.XA CN201410597183A CN104333036A CN 104333036 A CN104333036 A CN 104333036A CN 201410597183 A CN201410597183 A CN 201410597183A CN 104333036 A CN104333036 A CN 104333036A
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- H02J3/383—
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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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- H02J3/385—
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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
- H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
- H02J7/34—Parallel operation in networks using both storage and other dc sources, e.g. providing buffering
- H02J7/35—Parallel operation in networks using both storage and other dc sources, e.g. providing buffering with light sensitive cells
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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
- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- Y02A30/00—Adapting or protecting infrastructure or their operation
- Y02A30/14—Extreme weather resilient electric power supply systems, e.g. strengthening power lines or underground power cables
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E10/00—Energy generation through renewable energy sources
- Y02E10/50—Photovoltaic [PV] energy
- Y02E10/56—Power conversion systems, e.g. maximum power point trackers
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E70/00—Other energy conversion or management systems reducing GHG emissions
- Y02E70/30—Systems combining energy storage with energy generation of non-fossil origin
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- 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
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P90/00—Enabling technologies with a potential contribution to greenhouse gas [GHG] emissions mitigation
- Y02P90/50—Energy storage in industry with an added climate change mitigation effect
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- Supply And Distribution Of Alternating Current (AREA)
- Charge And Discharge Circuits For Batteries Or The Like (AREA)
Abstract
The invention provides a multi-source coordination control system which comprises a photovoltaic power generation unit, a battery pack management unit, a high-frequency isolation conversion unit, a bidirectional converting unit, a three-phase power grid energy flow direction management unit, a three-phase output unit, a control unit and a man-machine interaction unit. The multi-source coordination control system has the functions of multi-source coordination control, multi-directional energy flow, grid connected running, grid disconnected running and grid connected running and grid disconnected seamless switching and meets a future new energy development trend, a series of problems caused by massive disorderly development of the new energy are possibly solved, coordination control among a plurality of power supplies can be met, peak clipping and valley filling are realized, the energy is uninterruptedly supplied, and power grid dispatching is received.
Description
Technical field
The invention belongs to new forms of energy micro-capacitance sensor technical field of power generation, be specifically related to a kind of multi-source coordinated control system.
Background technology
Along with social economy's development and living standards of the people improve constantly, the requirement of people to the quality of power supply is more and more higher, and after especially entering 21 century, China's power construction speed is accelerated, and electric power scale constantly expands rapidly.Along with extra-high voltage grid construction and the enforcement of " three China " networking project, electrical network electrical link at different levels is day by day tight, and operation of power networks characteristic is increasingly sophisticated; On the other hand, large-scale new forms of energy access, power supply is the access of the micro-grid system of unit in a distributed manner, more outstanding to the test of power network safety operation; At these under the new situation, requirements at the higher level are proposed to the cooperation control between multi-source and electrical network.Multi-source coordinated operation control technology to promotion electrical network and multi-source coordinated operation, to ensure that power system safety and stability Quality and economy runs significant.
Current, energy-saving and emission-reduction, green energy resource, sustainable development become the focus that countries in the world are paid close attention to, development intelligent grid, progressively substitute with regenerative resource the fossil energy that day by day exhausted oil, coal and natural gas etc. are representative, pollution and greenhouse gas emission are reduced to acceptable degree; Realize accurate energy supply, corresponding energy supply, help each other energy supply and complementary energy supply, become world power development new trend.
Now due to the extra normal development of the intermittent renewable such as wind-powered electricity generation, photovoltaic generation of electricity by new energy, extensive new energy power generation grid-connection manifests the impact that power system safety and stability runs, a series of challenge is newly brought to operation of power networks scheduling, especially the operation and management of extensive access to conventional electric power system of distributed power generation brings new problem, and microgrid can realize effective integration and flexible, intelligent control to distributed power generation, it is a kind of important technological means solving the grid-connected problem of distributed power generation.The proposition of microgrid is intended to flexible, the efficient application that mesolow aspect realize distributed generation technology, solve substantial amounts, subject matter when various informative distributed power source is incorporated into the power networks, simultaneously owing to possessing certain energy management functionality, and the local optimum of holding power and balance as far as possible, effectively can reduce the scheduling difficulty of system cloud gray model personnel.The independent operation mode of ad hoc networking type microgrid can continue when outside electric network fault to power to the critical load in system, improves the safety and reliability of electricity consumption.In future, multi-source coordinated control system and method thereof will be one of the key measures of large-scale distributed electricity generation system energy of dissolving, and the device developed based on multi-source coordinated control system technology will for ensureing that extensive generation of electricity by new energy access electrical network play an important role.
In field of new energy generation, the major way that new forms of energy are dissolved is direct grid-connected mode, photothermal deformation mode, direct from network operation mode.Namely direct grid-connected is reverse into the power frequency ac voltage direct grid-connected of same width, homophase with line voltage by the current transformer based on power electronic equipment the energy from photovoltaic or is raised to the electrical network of more voltage levels by boosting isolating transformer again, energy is fed in bulk power grid, realizes dissolving of photovoltaic energy.Namely photothermal deformation mode becomes the form of heat directly to utilize the power conversion from photovoltaic or drive electrical generators generating as a vapor again.Directly be more common in, territory, non-Electric region unstable at electrical network tip or line voltage from net mode and directly added from net inverter powering load by photovoltaic generation.
In power electronic system device, common have photovoltaic combining inverter, from net inverter, the two-way inverter of energy storage
But above device can only work in one mode, mostly be the supply of a kind of power supply, as wind energy, solar energy.Output loading only has electrical network or direct terminal use, affects greatly by illumination, temperature, wind direction, line voltage, a reliable and stable power supply cannot be provided to supply for terminal use, the important place more especially needing uninterrupted power supply to supply or equipment.Therefore above device cannot meet the demands, and can not adapt to the trend of Future New Energy Source development.
Summary of the invention
For cooperation control between many power supplys can be met, realize peak load shifting, uninterrupted energy supply, accept dispatching of power netwoks, the invention provides a kind of multi-source coordinated control system, it possesses multi-source cooperation control, the multidirectional flowing of energy, can be incorporated into the power networks, can from network operation, can and from net seamless handover function, meeting Future New Energy Source development trend, being brought series of problems to provide possibility by solving the extensive development disorder of new forms of energy.
In order to realize foregoing invention object, the present invention takes following technical scheme:
The invention provides a kind of multi-source coordinated control system, comprise photovoltaic generation unit, battery set management unit, high-frequency isolation converting unit, Bidirectional variable-flow unit, three phase network energy flow to administrative unit, three-phase output unit, control unit and man-machine interaction unit;
Described photovoltaic generation unit by the energy transferring from photovoltaic array to high-frequency isolation converting unit;
Described battery set management unit by the energy that is stored in battery assembly module according to load actual demand to the transmission of high-frequency isolation converting unit;
Described high-frequency isolation converting unit according to load actual demand and battery set management unit state of charge to battery set management unit and Bidirectional variable-flow unit distribute energy;
Energy is passed to three-phase output unit by three phase network energy flow to administrative unit by described Bidirectional variable-flow unit, supply threephase load;
Described control unit realizes the unified cooperation control to photovoltaic generation unit, battery set management unit, high-frequency isolation converting unit, Bidirectional variable-flow unit and man-machine interaction unit;
Described man-machine interaction unit shows to user and far-end control centre, transmission system instantaneous operating conditions, and by man-machine interaction unit initialization system mode of operation, becomes privileged demand to adapt to load.
Described photovoltaic generation unit comprises photovoltaic array and maximum power point tracking unit; Described maximum power point tracking unit is connected with photovoltaic array by photovoltaic array interface;
Described photovoltaic array interface is IP65 degree of protection, and is easy-to-insert (pull) type, possesses creepage protection function, and maximum Ke Jie 16 road photovoltaic array, is convenient to user and freely configures photovoltaic array and in-site installation;
Energy from photovoltaic array is passed to high-frequency isolation converting unit with the form of maximum power point tracking by described maximum power point tracking unit, simultaneously voltage stabilization at setting range to make high-frequency isolation converting unit and photovoltaic array flexible configuration, reliable and stable work.
Described battery set management unit comprises battery assembly module and battery set charge/discharge administrative unit; Described battery set charge/discharge administrative unit is connected with battery assembly module by battery pack interface;
Described battery pack interface is plug and play type interface, and has high insulation characterisitic and high-protection level;
The instruction that energy from battery pack issues according to control unit discharges to high-frequency isolation converting unit by described battery set charge/discharge administrative unit, or the instruction that the energy from high-frequency isolation converting unit issues according to control unit is charged to battery assembly module, possess boost in voltage, buck functionality, possess the charging of electric current crossing current, discharging function simultaneously.
Described high-frequency isolation converting unit comprises low-voltage direct bus unit, the two-way isolated location of high frequency and high voltage dc bus unit;
Described low-voltage direct bus unit comprises low-voltage direct bus, DC support electric capacity and AD collector, realizes the energy of control photovoltaic array or battery assembly module to the two-way isolated location transmission of high frequency;
The two-way isolated location of described high frequency comprises booster circuit, high-frequency ramp voltage inductance, high-frequency inverter circuit, reduction voltage circuit, high-frequency rectification circuit, high-frequency isolation transformer, AD collector, realizes the energy transferring from low-voltage direct bus to high voltage dc bus;
Described high voltage dc bus unit comprises high voltage dc bus, DC support electric capacity and AD collector, realize by the energy transferring from the two-way isolated location of high frequency to Bidirectional variable-flow unit, or the energy transferring from Bidirectional variable-flow unit to battery set management unit.
Described Bidirectional variable-flow unit comprises based on can the three phase full bridge unit of switch-off power device, LCL filter unit, AD collector and can switch-off power device driving unit; It is power frequency three-phase rated voltage by the energy inversion from high-frequency isolation unit is the power supply of 380V that described Bidirectional variable-flow unit realizes, to supply three-phase output unit or three phase network energy flow to administrative unit; Or will be the direct voltage supply high frequency isolation converting unit of more than 600V to the energy rectification of administrative unit from three phase network energy flow, and then pass to battery set management unit.
The magnetic core that described LCL filter comprises high frequency three pole reactor L1, three-phase alternating current filter capacitor C1 and high frequency three pole reactor L2, high frequency three pole reactor L1 and the high frequency three pole reactor L2 connected successively all adopts non-crystaline amorphous metal to make.
Described three phase network energy flow comprises energy flow to management and soft start unit and three phase network interface to administrative unit;
Described energy flow comprises high speed electronic switch, high speed contact device, soft start resistance, AC voltage/current collector to management and soft start unit, realizes and the soft start of off-grid quick switching and initialization;
Described three phase network interface comprises the band circuit breaker of creepage protection function and three-phase alternating current joint, realizes by the energy transferring from three phase network to internal system, or provides path to three phase network transmission for system capacity.
Described three-phase output unit comprises circuit breaker and the three-phase alternating current interface of band creepage protection function, is embodied as and provides path from the energy of three phase network or the energy transferring of internal system to threephase load.
Described control unit comprises main control unit and Auxiliary Control Element;
Described main control unit is made up of the first digital processing unit, signal regulating panel, collection plate and communication board, realizes the communication with battery set management unit and man-machine interaction unit;
Described Auxiliary Control Element is made up of the second digital processing unit, signal regulating panel, collection plate, power panel, communication board, realizes the control to administrative unit of Bidirectional variable-flow unit and three phase network energy flow.
Described man-machine interaction unit comprises highlighted display screen and colorful full Touch-control liquid crystal display screen, complete the display to multi-source coordinated control system operating state, and for showing photovoltaic generation unit, battery set management unit and three phase network energy flow to respective input parameter information, output parameter information and the fault message of administrative unit.
Compared with prior art, beneficial effect of the present invention is:
1, multi-source energy compatibility controls efficient, science, accurately; Working stability, reliable; Grid-connected, from net independent operating and mutually can seamless switching; Input source is compatible strong; Applicable load type is many, generation of electricity by new energy usefulness utilizes optimum;
2, to have operating frequency high for maximum power point tracking unit, wide input voltage range, and self adaptation is strong, output voltage current harmonics little, maximum power tracing efficiency high;
3, battery set charge/discharge administrative unit possesses battery step-down charging, step-up discharge, constant current charge, constant-current discharge, energy in bidirectional flow function, have that operating frequency is high, wide input voltage range, dynamic response be fast, charging current ripple is little, output voltage precision high;
3, Bidirectional variable-flow unit can be operated in inverter mode and controlled rectification pattern, possesses the function energy from photovoltaic and battery being fed to load and electrical network, also possesses the function energy from electrical network being fed to battery simultaneously, can small-power section realize full module build, high-power section realize single brachium pontis and build, super high power carries out the pattern that the parallel connection of single brachium pontis is built, there is circuit stray inductance little, the advantages such as system reliability is high, flexible configuration, conversion efficiency are high, own loss is little;
4, the electrical isolation between alternating current-direct current is achieved by the two-way isolated location of high frequency, achieve the bi-directional of energy, simultaneously by the energy transferring pattern of high frequency, effectively improve energy transfer efficiency, greatly reduce the volume and weight of transformer, for the miniaturization of whole multi-source coordinated control system, lightweight, low-loss, high insulation resistance provide guarantee;
5, the magnetic core of two high-frequency inductors of LCL filter unit inside adopts new material non-crystaline amorphous metal, and this material great advantage is that magnetic flux density is high, magnetic permeability is high, and not easily saturated, loss is little, high frequency, and filter effect is good;
6, energy flow is to management and soft start unit is logical automatically switches fast according to electric network state and load, ensures the load from getting rid of rapidly when netting on bulk power grid, quick seamless handoff to from net state, for sensitive loads provides uninterrupted power supply.When electrical network is normal, can rapidly switchback net state, for Energy harvesting and feeding provide new passage, increase sensitive loads or important electricity consumption place redundancy stand-by power supply;
7, main control unit provides hardware guarantee for realizing multi-source cooperation control, is realize and battery management system, man-computer interactive communication, and backstage CPU and the communication of far-end control centre provide possibility;
8, Auxiliary Control Element provides hardware to management and soft start unit controls ensure for realizing Bidirectional variable-flow unit and energy flow, and for realizing communicating with master control system, the reply of self operating state provides hardware platform;
9, man-machine interaction unit (HMI) primary responsibility display multi-source coordinated control system operating state, the input in each source, output parameter information, fault message, input source parameter is self-defined, manually starts, the function such as stopping.For client brings intellectualized operation to experience;
10, for multi-source input cooperation control provides science, rationally, efficiently distributes rationally; Solve generation of electricity by new energy and bring intermittent problem by natural environments such as environment, temperature, illumination, maximizedly utilize generation of electricity by new energy to provide quality power to experience for client.For Future New Energy Source gas-to electricity pattern provides a kind of brand-new pattern;
11, input source can be photovoltaic, wind energy, lithium battery, lead-acid battery, electrical network; Load can be three-phase lighting system, three-phase heating system, three phase electric machine load, three-phase central air-conditioning, refrigerator, instrument and meter etc.
Accompanying drawing explanation
Fig. 1 is multi-source coordinated control system overall structure block diagram in the embodiment of the present invention;
Fig. 2 is multi-source coordinated control system detailed block diagram in the embodiment of the present invention.
Embodiment
Below in conjunction with accompanying drawing, the present invention is described in further detail.
The present invention has extremely strong novelty, integrated level is high, function is complete; Can multi-source coordinated operation, the multidirectional flowing of energy from net independent operating and from features such as net seamless switching, the two-way isolation of high frequency, rapid dynamic response speeds; Multi-source cooperation control can be realized, efficient, science, the optimization of generation of electricity by new energy receive utilization, for important place and equipment provide uninterrupted power supply demand, realize energy efficient, precisely transmit.Whole system Absorbable organic halogens, reliably working grid-connected or from net pattern, realize truly and from net seamless handover function.This invention is simultaneously compatible strong, can with background control center or the advantage such as grid dispatching center is mutual.Also can be used for some line voltage shakinesses, electrical network tip, the good region of intensity of illumination or to the higher equipment of the uninterrupted energy supply of grid requirements and place.There is great market prospects and social effect.
As Fig. 1 and Fig. 2 (illustrates: in figure, thick line represents energy line, and fine rule represents holding wire; Double-head arrow thick line represents that energy can two-way flow, and single arrow thick line represents that energy can only one-way flow; Double-head arrow fine rule represents that signal can bi-directional, single arrow fine rule represents that signal can only unidirectional delivery), the invention provides a kind of multi-source coordinated control system, comprise photovoltaic generation unit, battery set management unit, high-frequency isolation converting unit, Bidirectional variable-flow unit, three phase network energy flow to administrative unit, three-phase output unit, control unit and man-machine interaction unit;
Described photovoltaic generation unit by the energy transferring from photovoltaic array to high-frequency isolation converting unit;
Described battery set management unit by the energy that is stored in battery assembly module according to load actual demand to the transmission of high-frequency isolation converting unit;
Described high-frequency isolation converting unit according to load actual demand and battery set management unit state of charge to battery set management unit and Bidirectional variable-flow unit distribute energy;
Energy is passed to three-phase output unit by three phase network energy flow to administrative unit by described Bidirectional variable-flow unit, supply threephase load;
Described control unit realizes the unified cooperation control to photovoltaic generation unit, battery set management unit, high-frequency isolation converting unit, Bidirectional variable-flow unit and man-machine interaction unit;
Described man-machine interaction unit shows to user and far-end control centre, transmission system instantaneous operating conditions, and by man-machine interaction unit initialization system mode of operation, becomes privileged demand to adapt to load.
Described photovoltaic generation unit comprises photovoltaic array and maximum power point tracking unit; Described maximum power point tracking unit is connected with photovoltaic array by photovoltaic array interface;
Described photovoltaic array interface is IP65 degree of protection, and is easy-to-insert (pull) type, possesses creepage protection function, and maximum Ke Jie 16 road photovoltaic array, is convenient to user and freely configures photovoltaic array and in-site installation;
Energy from photovoltaic array is passed to the low-voltage direct bus unit of high-frequency isolation converting unit by described maximum power point tracking unit with the form of maximum power point tracking, simultaneously voltage stabilization at setting range to make high-frequency isolation converting unit and photovoltaic array flexible configuration, reliable and stable work.
Described battery set management unit comprises battery assembly module and battery set charge/discharge administrative unit; Described battery set charge/discharge administrative unit is connected with battery assembly module by battery pack interface;
Described battery pack interface is plug and play type interface, and has high insulation characterisitic and high-protection level;
The instruction that energy from battery assembly module issues according to control unit discharges to high-frequency isolation converting unit by described battery set charge/discharge administrative unit, or the instruction that the energy from high-frequency isolation converting unit issues according to control unit is charged to battery assembly module, possess boost in voltage, buck functionality, possess the charging of electric current crossing current, discharging function simultaneously.
Described high-frequency isolation converting unit comprises low-voltage direct bus unit, the two-way isolated location of high frequency and high voltage dc bus unit;
Described low-voltage direct bus unit comprises low-voltage direct bus, DC support electric capacity and AD collector, realizes the energy of control photovoltaic array or battery assembly module to the two-way isolated location transmission of high frequency;
The two-way isolated location of described high frequency comprises booster circuit, high-frequency ramp voltage inductance, high-frequency inverter circuit, reduction voltage circuit, high-frequency rectification circuit, high-frequency isolation transformer, AD collector, realizes the energy transferring from low-voltage direct bus to high voltage dc bus;
Described high voltage dc bus unit comprises high voltage dc bus, DC support electric capacity and AD collector, realize by the energy transferring from the two-way isolated location of high frequency to Bidirectional variable-flow unit, or the energy transferring from Bidirectional variable-flow unit to battery set management unit.
Described Bidirectional variable-flow unit comprises based on can the three phase full bridge unit of switch-off power device, LCL filter unit, AD collector and can switch-off power device driving unit; It is power frequency three-phase rated voltage by the energy inversion from high-frequency isolation unit is the power supply of 380V that described Bidirectional variable-flow unit realizes, to supply three-phase output unit or three phase network energy flow to administrative unit; Or will be the direct voltage supply high frequency isolation converting unit of more than 600V to the energy rectification of administrative unit from three phase network energy flow, and then pass to battery set management unit.
The magnetic core that described LCL filter comprises high frequency three pole reactor L1, three-phase alternating current filter capacitor C1 and high frequency three pole reactor L2, high frequency three pole reactor L1 and the high frequency three pole reactor L2 connected successively all adopts non-crystaline amorphous metal to make.
Described three phase network energy flow comprises energy flow to management and soft start unit and three phase network interface to administrative unit;
Described energy flow comprises high speed electronic switch, high speed contact device, soft start resistance, AC voltage/current collector to management and soft start unit, realizes and the soft start of off-grid quick switching and initialization;
Described three phase network interface comprises the band circuit breaker of creepage protection function and three-phase alternating current joint, realizes by the energy transferring from three phase network to internal system, or provides path to three phase network transmission for system capacity.
Described three-phase output unit comprises circuit breaker and the three-phase alternating current interface of band creepage protection function, is embodied as and provides path from the energy of three phase network or the energy transferring of internal system to threephase load.
Described control unit comprises main control unit and Auxiliary Control Element;
Described main control unit is made up of the first digital processing unit, signal regulating panel, collection plate and communication board, realizes the communication with battery set management unit and man-machine interaction unit;
Described Auxiliary Control Element is made up of the second digital processing unit, signal regulating panel, collection plate, power panel, communication board, realizes the control to administrative unit of Bidirectional variable-flow unit and three phase network energy flow.
Described man-machine interaction unit comprises highlighted display screen and colorful full Touch-control liquid crystal display screen, complete the display to multi-source coordinated control system operating state, and for showing photovoltaic generation unit, battery set management unit and three phase network energy flow to respective input parameter information, output parameter information and the fault message of administrative unit.
Photovoltaic generation unit determines energy feed direction according to load, energy-storage battery state, three phase network situation;
When three phase network exists, when load power demand is less than ceiling capacity that photovoltaic provides, if now the energy of battery assembly module is less than 20% of total capacity, then an energy part for photovoltaic array is passed through low-voltage direct bus unit, the two-way isolated location of high frequency, high voltage dc bus unit, Bidirectional variable-flow unit, LCL filter unit, is supplied threephase load and three phase network finally by energy flow to management and soft start unit.Remain part or all to be charged to battery assembly module by battery set charge/discharge administrative unit.If battery assembly module is full of, energy feeds back to three phase network again.If photovoltaic energy is not enough, now the energy of battery assembly module is lower than 20% of total capacity, loading demand energy is then provided together with three phase network by photovoltaic array, wherein the energy flow that provides of photovoltaic array is to as described above, the energy that three phase network provides is supplied to threephase load by energy flow to management and soft start unit, three phase network simultaneously by energy flow to management and soft start unit, LCL filter unit, Bidirectional variable-flow unit, high voltage dc bus unit, the two-way isolated location of high frequency, low-voltage direct bus unit, battery set charge/discharge administrative unit is charged to battery assembly module.If battery assembly module energy is sufficient, threephase load by battery assembly module together with photovoltaic array to threephase load function.
When three phase network does not exist, when load power demand is less than the energy of photovoltaic array, if the energy of battery assembly module is less than 20% of total capacity, an energy part for photovoltaic array is by the two-way isolated location of high frequency, Bidirectional variable-flow unit supply threephase load, and remainder is charged to battery assembly module with constant current mode by battery pack group management of charging and discharging unit.If threephase load demand is greater than the energy of photovoltaic array, when the electricity of battery assembly module is sufficient, threephase load energy supply is given together with battery assembly module by photovoltaic array, when battery assembly module electricity lower than 20% time, systems stay sends warning message, and through after a while, (can by the self-defined setting of client) system then quits work.
The energy that whole system can be from photovoltaic or wind energy, energy-storage battery, electrical network carries out science, efficient and rational cooperation control, allows energy according to load actual condition, intelligently distributes.Really accomplish unattended operation, new forms of energy efficiency utilization, lasting, uninterrupted energy supply.Providing a kind of solution pattern completely newly for solving the generation of electricity by new energy intermittent problems that the natural situations such as environment, temperature, illumination bring of originally experiencing, brand-new using electroreception for terminal electricity consumer brings.Can be enterprise and create huge economic and social benefit.
Finally should be noted that: above embodiment is only in order to illustrate that technical scheme of the present invention is not intended to limit; those of ordinary skill in the field still can modify to the specific embodiment of the present invention with reference to above-described embodiment or equivalent replacement; these do not depart from any amendment of spirit and scope of the invention or equivalent replacement, are all applying within the claims of the present invention awaited the reply.
Claims (10)
1. a multi-source coordinated control system, is characterized in that: described system comprises photovoltaic generation unit, battery set management unit, high-frequency isolation converting unit, Bidirectional variable-flow unit, three phase network energy flow to administrative unit, three-phase output unit, control unit and man-machine interaction unit;
Described photovoltaic generation unit by the energy transferring from photovoltaic array to high-frequency isolation converting unit;
Described battery set management unit by the energy that is stored in battery assembly module according to load actual demand to the transmission of high-frequency isolation converting unit;
Described high-frequency isolation converting unit according to load actual demand and battery set management unit state of charge to battery set management unit and Bidirectional variable-flow unit distribute energy;
Energy is passed to three-phase output unit by three phase network energy flow to administrative unit by described Bidirectional variable-flow unit, supply threephase load;
Described control unit realizes the unified cooperation control to photovoltaic generation unit, battery set management unit, high-frequency isolation converting unit, Bidirectional variable-flow unit and man-machine interaction unit;
Described man-machine interaction unit shows to user and far-end control centre, transmission system instantaneous operating conditions, and by man-machine interaction unit initialization system mode of operation, to adapt to loading demand.
2. multi-source coordinated control system according to claim 1, is characterized in that: described photovoltaic generation unit comprises photovoltaic array and maximum power point tracking unit; Described maximum power point tracking unit is connected with photovoltaic array by photovoltaic array interface;
Described photovoltaic array interface is IP65 degree of protection, and is easy-to-insert (pull) type, possesses creepage protection function, and maximum Ke Jie 16 road photovoltaic array, is convenient to user and freely configures photovoltaic array and in-site installation;
Energy from photovoltaic array is passed to high-frequency isolation converting unit with the form of maximum power point tracking by described maximum power point tracking unit, simultaneously voltage stabilization at setting range to make high-frequency isolation converting unit and photovoltaic array flexible configuration, reliable and stable work.
3. multi-source coordinated control system according to claim 1, is characterized in that: described battery set management unit comprises battery assembly module and battery set charge/discharge administrative unit; Described battery set charge/discharge administrative unit is connected with battery assembly module by battery pack interface;
Described battery pack interface is plug and play type interface, and has high insulation characterisitic and high-protection level;
The instruction that energy from battery assembly module issues according to control unit discharges to high-frequency isolation converting unit by described battery set charge/discharge administrative unit, or the instruction that the energy from high-frequency isolation converting unit issues according to control unit is charged to battery assembly module, possess boost in voltage, buck functionality, possess the charging of electric current crossing current, discharging function simultaneously.
4., according to the arbitrary described multi-source coordinated control system of claim 1-3, it is characterized in that: described high-frequency isolation converting unit comprises low-voltage direct bus unit, the two-way isolated location of high frequency and high voltage dc bus unit;
Described low-voltage direct bus unit comprises low-voltage direct bus, DC support electric capacity and AD collector, realizes the energy of control photovoltaic array or battery assembly module to the two-way isolated location transmission of high frequency;
The two-way isolated location of described high frequency comprises booster circuit, high-frequency ramp voltage inductance, high-frequency inverter circuit, reduction voltage circuit, high-frequency rectification circuit, high-frequency isolation transformer, AD collector, realizes the energy transferring from low-voltage direct bus to high voltage dc bus;
Described high voltage dc bus unit comprises high voltage dc bus, DC support electric capacity and AD collector, realize by the energy transferring from the two-way isolated location of high frequency to Bidirectional variable-flow unit, or the energy transferring from Bidirectional variable-flow unit to battery set management unit.
5. multi-source coordinated control system according to claim 1, is characterized in that: described Bidirectional variable-flow unit comprises based on can the three phase full bridge unit of switch-off power device, LCL filter unit, AD collector and can switch-off power device driving unit; It is power frequency three-phase rated voltage by the energy inversion from high-frequency isolation unit is the power supply of 380V that described Bidirectional variable-flow unit realizes, to supply three-phase output unit or three phase network energy flow to administrative unit; Or will be the direct voltage supply high frequency isolation converting unit of more than 600V to the energy rectification of administrative unit from three phase network energy flow, and then pass to battery set management unit.
6. multi-source coordinated control system according to claim 1, it is characterized in that: the magnetic core that described LCL filter comprises high frequency three pole reactor L1, three-phase alternating current filter capacitor C1 and high frequency three pole reactor L2, high frequency three pole reactor L1 and the high frequency three pole reactor L2 connected successively all adopts non-crystaline amorphous metal to make.
7. multi-source coordinated control system according to claim 1 or 5, is characterized in that: described three phase network energy flow comprises energy flow to management and soft start unit and three phase network interface to administrative unit;
Described energy flow comprises high speed electronic switch, high speed contact device, soft start resistance, AC voltage/current collector to management and soft start unit, realizes and the soft start of off-grid quick switching and initialization;
Described three phase network interface comprises the band circuit breaker of creepage protection function and three-phase alternating current joint, realizes by the energy transferring from three phase network to internal system, or provides path to three phase network transmission for system capacity.
8. multi-source coordinated control system according to claim 1; it is characterized in that: described three-phase output unit comprises circuit breaker and the three-phase alternating current interface of band creepage protection function, is embodied as and provides path from the energy of three phase network or the energy transferring of internal system to threephase load.
9. multi-source coordinated control system according to claim 1, is characterized in that: described control unit comprises main control unit and Auxiliary Control Element;
Described main control unit is made up of the first digital processing unit, signal regulating panel, collection plate and communication board, realizes the communication with battery set management unit and man-machine interaction unit;
Described Auxiliary Control Element is made up of the second digital processing unit, signal regulating panel, collection plate, power panel, communication board, realizes the control to administrative unit of Bidirectional variable-flow unit and three phase network energy flow.
10. multi-source coordinated control system according to claim 1, it is characterized in that: described man-machine interaction unit comprises highlighted display screen and colorful full Touch-control liquid crystal display screen, complete the display to multi-source coordinated control system operating state, and for showing photovoltaic generation unit, battery set management unit and three phase network energy flow to respective input parameter information, output parameter information and the fault message of administrative unit.
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