CN106058905B - Distributed photovoltaic energy storage peak shaving system based on power prediction - Google Patents
Distributed photovoltaic energy storage peak shaving system based on power prediction Download PDFInfo
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- CN106058905B CN106058905B CN201610570125.7A CN201610570125A CN106058905B CN 106058905 B CN106058905 B CN 106058905B CN 201610570125 A CN201610570125 A CN 201610570125A CN 106058905 B CN106058905 B CN 106058905B
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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
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J3/00—Circuit arrangements for ac mains or ac distribution networks
- H02J3/38—Arrangements for parallely feeding a single network by two or more generators, converters or transformers
- H02J3/46—Controlling of the sharing of output between the generators, converters, or transformers
-
- 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
- H02J9/00—Circuit arrangements for emergency or stand-by power supply, e.g. for emergency lighting
- H02J9/04—Circuit arrangements for emergency or stand-by power supply, e.g. for emergency lighting in which the distribution system is disconnected from the normal source and connected to a standby source
- H02J9/06—Circuit arrangements for emergency or stand-by power supply, e.g. for emergency lighting in which the distribution system is disconnected from the normal source and connected to a standby source with automatic change-over, e.g. UPS systems
- H02J9/061—Circuit arrangements for emergency or stand-by power supply, e.g. for emergency lighting in which the distribution system is disconnected from the normal source and connected to a standby source with automatic change-over, e.g. UPS systems for DC powered loads
-
- 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
- H02J9/00—Circuit arrangements for emergency or stand-by power supply, e.g. for emergency lighting
- H02J9/04—Circuit arrangements for emergency or stand-by power supply, e.g. for emergency lighting in which the distribution system is disconnected from the normal source and connected to a standby source
- H02J9/06—Circuit arrangements for emergency or stand-by power supply, e.g. for emergency lighting in which the distribution system is disconnected from the normal source and connected to a standby source with automatic change-over, e.g. UPS systems
- H02J9/068—Electronic means for switching from one power supply to another power supply, e.g. to avoid parallel connection
-
- 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
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B10/00—Integration of renewable energy sources in buildings
- Y02B10/70—Hybrid systems, e.g. uninterruptible or back-up power supplies integrating renewable energies
-
- 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
- Y02E70/00—Other energy conversion or management systems reducing GHG emissions
- Y02E70/30—Systems combining energy storage with energy generation of non-fossil origin
Abstract
The present invention relates to a kind of distributed photovoltaic energy storage peak shaving system based on power prediction, including photovoltaic cells, grid-connecting apparatus, power grid end, off-network device, power prediction, electric energy scheduling, energy storage device, load etc.；Whole system is made of photovoltaic cells, gird-connected inverter, grid-connected electric energy meter, gate energy meter, power grid, off-network DC/DC controller, AC/DC controller, energy storage management system, off-network DC/AC controller, DC load, AC load, energy storage device, powder prediction device, switch control unit, communication unit, remote server, controlled switch K0, K1, K2, K3, K4, K5 etc.；The output of power prediction controls the state of controlled switch by switch control unit, make the distributed photovoltaic energy storage peak shaving system based on power prediction that can dispatch the residual capacity of energy storage device in advance, to reach following purpose: when the following photovoltaic output is greater than load, extra photovoltaic electric energy is stored by energy storage device, it realizes that distributed photovoltaic is generated power for their own use highest percentage, improves distributed photovoltaic income level；When the following mains failure, underload part is provided by energy storage device and photovoltaic off-grid power supply unit, improves power supply system reliability；The function of peak load shifting is provided for the significant area of step price, improves comprehensive utilization rate of systems, improves income level.
Description
Technical field
The present invention relates to the distributed photovoltaic energy storage peak shaving systems based on power prediction, belong to new energy and distributed photovoltaic
Energy storage peak shaving application field.
Background technique
Energy environment issues are an important factor for restricting economy, social development, and traditional energy, which utilizes, has great environment
Cost, photovoltaic power generation belong to field of new energy generation, and the environmental-friendly feature having is to solve the breakthrough of energy environment issues
Mouthful.In recent years, China has made large quantities of large-scale ground photo-voltaic power generation stations, also leaves one while promoting theCourse of PV Industry
A little negative effects, are limited by land use, and large-sized photovoltaic power station is built the northwestward is meagrely-populated, more desertes, barren beach more
Area, local electric energy consumption ability is limited, and overhead power transmission line is laid with progress and does not obviously catch up with photovoltaic plant construction speed, causes
It is prominent mostly to abandon optical issue, photovoltaic power generation has greatly waste, and photovoltaic power generation enterprise income cannot get effective guarantee, or even deposit
It is serious to affect photovoltaic power generation sustainable and healthy development in serious financial loss.The abandoning optical phenomenon of photovoltaic plant has caused
The attention of State-level protects the positive of photovoltaic power generation enterprise development photovoltaic power generation to protect photovoltaic power generation sustainable and healthy development
Property, National Development and Reform Committee, National Energy Board receive in appearance on May 27th, 2016 about wind-powered electricity generation, photovoltaic power generation protection in full is carried out
The notice of management work is purchased, hair changes the energy [2016] 1150, and having appraised and decided part, there are in abandonment, abandoning optical issue area planning
Annual utilization hours are purchased in the minimum guarantee of wind-powered electricity generation, photovoltaic power generation.It the digestion capability of photovoltaic plant location photovoltaic electric energy and sends outside
Ability is the essence restraining factors of local theCourse of PV Industry, and hair, which changes the energy [2016] 1150, to be protected in policy
The income of photovoltaic plant is built, but cannot fundamentally solve that photovoltaic power generation and digestion capability are insufficient, transmission of electricity construction progress is seriously stagnant
Essence contradiction afterwards.
Distributed photovoltaic power generation dissolves nearby due to can be realized photovoltaic power generation, reduces the loss of power transmission and distribution link, by
It is more and more to pay close attention to and pay attention to, the development that relevant policies promote distributed photovoltaic power generation, mesh have been put into effect on State-level successively
Preceding distributed photovoltaic power generation mainly has " generating power for their own use, remaining electricity online " and " online in full " both of which, " generates power for their own use, remaining electricity
Mode Enterprise income mainly has for online ", by the public subsidies that generated energy in full obtains, the electricity cost for saving of generating power for their own use, with
And the gene-ration revenue three parts that remaining electricity online part obtains.
In the existing power grid system in China, electricity rates are much higher than generating price, therefore " generating power for their own use, remaining electricity online "
Under mode, increases the ratio that user terminal is generated power for their own use, distributed photovoltaic power generation enterprise can be made to obtain higher gene-ration revenue, subtracted
Few enterprise investment payoff period improves the enthusiasm that distributed photovoltaic power generation enterprise promotes distributed photovoltaic, is conducive to entire photovoltaic
The sound development of industry, however photovoltaic power generation peak period is not exclusively synchronous with peak times of power consumption, what photovoltaic power generation peak period issued
Electric energy is greatly sold to power grid enterprises by the pricing mode of remaining electricity online, virtually reduces the income of photovoltaic power generation enterprise
It is horizontal.In order to improve the ratio that user terminal is generated power for their own use, a kind of distributed photovoltaic energy storage peak shaving based on power prediction is proposed
System, which organically combines grid-connected, off-network, energy storage, power prediction, electric energy scheduling, load etc., pre- by reasonable power
It surveys and electric energy scheduling is, it can be achieved that distributed photovoltaic output 100% is generated power for their own use, utilize time-of-use tariffs peak load shifting and conduct
Backup power source improves power supply reliability.
Summary of the invention
The present invention generates power for their own use the problem of ratio deficiency for distributed photovoltaic power generation, proposes and a kind of is based on power prediction
Distributed photovoltaic energy storage peak shaving system, main purpose is: dispatched by reasonable power prediction and electric energy, solve it is distributed
Photovoltaic generate power for their own use ratio deficiency problem while, can further realize using time-of-use tariffs peak load shifting, and as spare
Power supply improves power supply system reliability.Another significance of the invention is, is based on function by the way that application is provided by the invention
The distributed photovoltaic energy storage peak shaving system of rate prediction can greatly improve in the case where changing very little and have energy storage device
Power supply system, such as communication base station power supply system, the comprehensive utilization ratio of power supply system with standby UPS, in addition to this, structure
It is that demand is big, industrialization level is higher, the lower-cost standard of scale is set at most equipment and device of the invention
Method that is standby, therefore providing through the invention, user or enterprise can realize the transformation of former power supply system with seldom investment, change
Power supply system after making is provided simultaneously with parallel network power generation and peak regulation, photovoltaic off-grid power generation, utilizes time-of-use tariffs peak load shifting
And improve the function of power supply system reliability.
Specifically, the purpose of the present invention is achieved through the following technical solutions:
The present invention is by photovoltaic cells (100), gird-connected inverter (101), grid-connected electric energy meter (102), gate energy meter
(103), power grid (137), off-network DC/DC controller (104), AC/DC controller (105), energy storage management system (106), off-network
DC/AC controller (107), DC load (108), AC load (109), energy storage device (110), powder prediction device (111),
The composition such as switch control unit (112), communication unit (113), controlled switch K0, K1, K2, K3, K4, K5；Photovoltaic cells (100)
It is connected with controlled switch K1, K2, the input of gird-connected inverter (101) is connected with controlled switch K1, gird-connected inverter (101) output
It is connected with grid-connected electric energy meter (102) input, grid-connected electric energy meter (102) output and gate energy meter (103), controlled switch K3, K5
It is connected, gate energy meter (103) output gets access to grid (137)；Off-network DC/DC controller (104) input is connected with controlled switch K2,
It exports the input for being connected to energy storage management system (106)；AC/DC controller (105) input is connected with controlled switch K3, defeated
It is connected to the input of energy storage management system (106) out；The input of off-network DC/AC controller (107) and energy storage management system (106)
Output be connected, output be connected with controlled switch K4；Controlled switch K4, K5 close to AC load (109) side be connected after with
AC load (109) is connected；The input of DC load (108) is connected by K0 with the output of energy storage management system (106)；Storage
Energy device (110) is connected directly with energy storage management system (106)；The output of powder prediction device (111) and switch control unit
(112) input is connected, and RS485/422 bus interface is filled with photovoltaic cells (100), energy storage respectively by RS485/422 bus
Set (110), DC load (108), AC load (109), gate energy meter (103), communication unit (113) RS485/422
Bus interface is connected.
System provided by the invention can induction and conclusion be four-layer structure, first layer structure includes photovoltaic cells (114), second
Layer structure includes power grid end (115), grid-connecting apparatus (116), off-network device (117), and third layer structure includes power prediction
(121), electric energy scheduling (118), four-layer structure includes energy storage device (119), load (120), and wherein power grid end (115) are by closing
Mouth electric energy meter (103) and power grid (137) composition, grid-connecting apparatus (116) is by K1, gird-connected inverter (101) and grid-connected electric energy meter
(102) it forms, off-network device (117) is made of K2, off-network DC/DC controller (104), and power prediction (121) is by power prediction
Device (111) and communication unit (113) composition, electric energy dispatch (118) by K0, K3, K4, K5, switch control unit (112), storage
Energy management system (106), AC/DC controller (105), off-network DC/AC controller (107) composition, load (120) are born by direct current
Photovoltaic cells, grid-connected, off-network, energy storage, power prediction, electric energy are dispatched, are negative by lotus (108), AC load (109) composition, system
Lotus etc. organically combines into an entirety.
In system provided by the invention, distributed photovoltaic is based on grid-connected, supplemented by off-network, only when mains failure,
To maximally utilize distributed photovoltaic electric energy, distributed photovoltaic just works in off-network state, and K1 closure shows that power grid is normal and divides
In grid connection state, K2 closure shows that power grid has had a power failure and distributed photovoltaic work or quasi- work exist for the work of cloth photovoltaic or quasi- work
Off-network state, K3, K5 can not power closure when K2 is closed for downstream plant, and defining K1, K2 at any time cannot be same
When be in closed state, K2 be closed when K3, K5 in any one cannot be closed state, K4, K5 at any time cannot be simultaneously
In closed state, K3, K4 are not in closed state simultaneously, and 64 kinds of switch states that K0~K5 is constituted exclude in above-mentioned definition
After irrealizable switch state, remaining 24 kinds of effective switch states.
In system provided by the invention, powder prediction device (111) obtains photovoltaic cells history by RS485 bus
Operation and maintenance information, DC load history run safeguard information, the following power distribution information determined, AC load history run
Safeguard information, the following power distribution information determined, energy storage device history run safeguards information, current remaining capacity information, electricity
Net scheduling, have a power failure arrangement and timesharing time-of-use tariffs information, local photovoltaic power generation historical sample information, local Weather Forecast Information
Deng providing the switch state that K0~K5 is determined after powder prediction device (111) integrated treatment above- mentioned information, and pass through switch control
Unit (112) control K0~K5 switch is opened or closed, to plan that energy storage device residual capacity completes electric energy scheduling in advance.
In system provided by the invention, it includes the achievable system of communication unit (113) and remote server between
Information exchange, but its main function be reception system installation ground photovoltaic power generation historical sample information, Function Fitting method and
Relevant parameter, and send it to powder prediction device (111) and closed to be fitted the function of photovoltaic generation power and weather information
System, powder prediction device (111) are tieed up using the following Weather Forecast Information, the functional relation of fitting and photovoltaic cells history run
The information such as information are protected to determine system future photovoltaic generation power, are collected simultaneously dispatching of power netwoks, have a power failure arrangement and timesharing peak-trough electricity
The relevant information of valence, the following power distribution of alternating current-direct current load and energy storage device residual capacity etc., passes through switch control unit
(112) the achievable following function of state of control K0~K5 switch: make energy storage device before the arrival of distributed photovoltaic peak power
The enough memory capacity of advance reservation, to realize that distributed photovoltaic power generation 100% is generated power for their own use；Store up energy storage device before power failure
Standby enough capacity are full with the memory capacity for ensuring to can use the power generation of distributed photovoltaic off-network and energy storage device itself after having a power failure
Sufficient workload demand；Energy storage device is set to lay in suitable electric energy in low ebb electricity price, guarantee future load is using photovoltaic power generation and in advance
It deposits electricity and obtains maximum gain.
Method provided by the invention be suitable for be transformed have energy storage device power supply system, as communication base station power supply system,
Power supply system etc. with standby UPS, under the premise of not changing original system power supply structure, by increasing in right amount with photovoltaic array
(122), gird-connected inverter (123), grid-connected electric energy meter (124), off-network DC/DC controller (125), communication unit (126), function
Rate prediction meanss (127), switch control unit (128) and controlled switch K6, K7, K8 etc. for realizing electric energy scheduling, it is real
Now meet the distributed photovoltaic energy storage peak shaving system of user's primary demand.
Detailed description of the invention
Fig. 1 is the distributed photovoltaic energy storage peak shaving system schematic diagram based on power prediction；
Fig. 2 is the distributed photovoltaic energy storage peak shaving system structure chart based on power prediction；
Fig. 3 is communication base station power supply system transformation map；
Fig. 4 is to realize electric energy scheduling flow figure when distributed photovoltaic power generation 100% is generated power for their own use；
Fig. 5 is to realize electric energy scheduling flow figure when meeting workload demand that has a power failure；
Fig. 6 is to realize to utilize electric energy scheduling flow figure when time-of-use tariffs peak load shifting function；
Fig. 7 is controlled switch on-off logic table.
Specific embodiment
Embodiment one:
Distributed photovoltaic energy storage peak shaving system based on power prediction includes: photovoltaic cells (100), gird-connected inverter
(101), grid-connected electric energy meter (102), gate energy meter (103), power grid (137), off-network DC/DC controller (104), AC/DC control
Device (105) processed, energy storage management system (106), off-network DC/AC controller (107), DC load (108), AC load (109),
Energy storage device (110), powder prediction device (111), switch control unit (112), communication unit (113), controlled switch K0,
K1, K2, K3, K4, K5 etc..
The connection type of each section is as shown in Figure 1, its specific connection type is as follows: photovoltaic cells (100) and controlled switch
K1, K2 are connected, and the input of gird-connected inverter (101) is connected with controlled switch K1, gird-connected inverter (101) output and grid-connected electric energy
Table (102) input is connected, and grid-connected electric energy meter (102) output is connected with gate energy meter (103), controlled switch K3, K5, critical point electricity
Energy table (103) exports and gets access to grid (137)；Off-network DC/DC controller (104) input is connected with controlled switch K2, output connection
To the input of energy storage management system (106)；AC/DC controller (105) input is connected with controlled switch K3, and output is connected to storage
The input of energy management system (106)；The input of off-network DC/AC controller (107) and the output phase of energy storage management system (106)
Even, output is connected with controlled switch K4；Controlled switch K4, K5 are close to the connected rear and AC load in AC load (109) side
(109) it is connected；The input of DC load (108) is connected by K0 with the output of energy storage management system (106)；Energy storage device
(110) it is connected directly with energy storage management system (106)；The output of powder prediction device (111) and switch control unit (112)
Input be connected, RS485/422 bus interface by RS485/422 bus respectively with photovoltaic cells (100), energy storage device
(110), DC load (108), AC load (109), gate energy meter (103), the RS485/422 of communication unit (113) are total
Line interface is connected.
Fig. 2 show the system construction drawing according to Fig. 1 induction and conclusion, whole system can induction and conclusion be four-layer structure, the
One layer of structure includes photovoltaic cells (114), and second layer structure includes power grid end (115), grid-connecting apparatus (116), off-network device
(117), third layer structure include power prediction (121), electric energy scheduling (118), four-layer structure include energy storage device (119),
Load (120), wherein power grid end (115) are made of gate energy meter (103) and power grid (137), grid-connecting apparatus (116) by K1,
Gird-connected inverter (101) and grid-connected electric energy meter (102) composition, off-network device (117) is by K2, off-network DC/DC controller (104)
Composition, power prediction (121) is made of powder prediction device (111) and communication unit (113), electric energy scheduling (118) by K0,
K3, K4, K5, switch control unit (112), energy storage management system (106), AC/DC controller (105), off-network DC/AC control
Device (107) composition, load (120) is made of DC load (108), AC load (109), system by photovoltaic cells, it is grid-connected, from
Net, energy storage, power prediction, electric energy scheduling, load etc. are organically combined into an entirety.
Embodiment two:
In distributed photovoltaic energy storage peak shaving system based on power prediction, distributed photovoltaic based on grid-connected, supplemented by off-network,
Only when mains failure, to maximally utilize distributed photovoltaic electric energy, distributed photovoltaic just works in off-network state, K1 closure
Show power grid normal and distributed photovoltaic work or quasi- work are in grid connection state, K2 closure shows that power grid has had a power failure and distributed light
Coucher is made or quasi- work is in off-network state, and K3, K5 can not power closure when K2 is closed for downstream plant, define K1, K2
It is not simultaneously in closed state at any time, any one in K3, K5 cannot be closed state when K2 is closed, and K4, K5 exist
Any moment is not simultaneously in closed state, and K3, K4 are not in closed state, 64 kinds of switch states that K0~K5 is constituted simultaneously
It excludes in above-mentioned definition after irrealizable switch state, remaining 24 kinds of effective switch states.
In distributed photovoltaic energy storage peak shaving system based on power prediction, K0~K5 all possible switch state and switch
As shown in fig. 7, wherein 0 indicating to be in an off state inductive switch, 1 indicates to be in closed state to inductive switch state description.Fig. 7
What is provided is all possible switch state of controlled switch K0~K5, and K0~K5 currently should be in which kind of switch state by function
Rate prediction meanss (111) determine that specific implementation is as follows according to the result of power prediction: powder prediction device (111)
Photovoltaic cells history run is obtained by RS485 bus and safeguards information, and DC load history run safeguards that information, future determine
Power distribution information, AC load history run safeguard information, the following power distribution information determined, energy storage device history run
Safeguard information, current remaining capacity information, dispatching of power netwoks, power failure arrange and timesharing time-of-use tariffs information, local photovoltaic power generation are gone through
It is true to provide K0~K5 after powder prediction device (111) integrated treatment above- mentioned information for history sample information, local Weather Forecast Information etc.
Fixed switch state, and being opened or closed for K0~K5 switch is controlled by switch control unit (112), to plan energy storage in advance
Device residual capacity completes electric energy scheduling.
In distributed photovoltaic energy storage peak shaving system based on power prediction, communication unit (113) achievable system and distal end
Information exchange between server, but its main function is reception system installation ground photovoltaic power generation historical sample information, function
Approximating method and relevant parameter, and powder prediction device (111) is sent it to be fitted photovoltaic generation power and meteorological letter
The functional relation of breath, powder prediction device (111) utilize the following Weather Forecast Information, the functional relation and photovoltaic cells of fitting
History run maintenance information etc. information determine system future photovoltaic generation power, be collected simultaneously dispatching of power netwoks, have a power failure arrange and
The relevant information of timesharing time-of-use tariffs, the following power distribution of alternating current-direct current load and energy storage device residual capacity etc., by opening
It closes the achievable following function of state of control unit (112) control K0~K5 switch: making energy storage device in distributed photovoltaic peak value
The enough memory capacity of advance reservation before power arrives, to realize that distributed photovoltaic power generation 100% is generated power for their own use；Make energy storage device
Enough capacity are laid in, before power failure to ensure to can use the power generation of distributed photovoltaic off-network and energy storage device itself after having a power failure
Memory capacity meets workload demand；So that energy storage device is laid in suitable electric energy in low ebb electricity price, guarantees that future load utilizes light
Volt generates electricity and prestores electricity and obtains maximum gain.
In present case, to realize that distributed photovoltaic power generation 100% is generated power for their own use, the detailed process of electric energy scheduling is carried out in advance
As follows: powder prediction device (111) prediction obtains the following photovoltaic power generation quantity, load power consumption, and it is surplus to obtain current energy storage device
Remaining electricity, then judges whether the following photovoltaic power generation quantity is greater than future load power consumption, if it is not greater, then K0~K5's is current
Switch state can remain unchanged or be switched to the switch state for remaining unchanged energy storage device current capacities, otherwise, then into one
It walks and judges all absorb photovoltaic providing auxiliary power amount using battery in the case where K0~K5 switch state does not change,
If battery can absorb photovoltaic providing auxiliary power amount, K0~K5 current switch states, which can be remained unchanged or are switched to, makes energy storage
The switch state that device current capacities remain unchanged, otherwise, K0~K5 current switch states, which are switched to, releases that energy storage device in advance
Put the state of capacity.The detailed process of the process can refer to shown in Fig. 4.
In present case, expired after having a power failure for realization using the memory capacity of the power generation of distributed photovoltaic off-network and energy storage device itself
Sufficient workload demand, carrying out electric energy scheduling in advance, detailed process is as follows: photovoltaic after the following power failure of powder prediction device (111) prediction
Generated energy, load power consumption, and current energy storage device remaining capacity is obtained, then photovoltaic power generation quantity and storage after the following power failure of judgement
Whether the sum of energy device current electric quantity is greater than the following power failure afterload power consumption, if it is not greater, then the current switch of K0~K5
State is switched to the state for making energy storage device pass through the preparatory idle capacity of alternating current, and otherwise, the current switch states of K0~K5 can be protected
It holds constant or is switched to the switch state for remaining unchanged capacity of energy storing device.The detailed process of the process can refer to shown in Fig. 5.
In present case, time-of-use tariffs peak load shifting function is utilized to realize, carries out the detailed process of electric energy scheduling such as in advance
Under: powder prediction device (111) obtains current power price first, and judges whether be currently peak times of power consumption electricity price, if
It is currently not peak times of power consumption electricity price, then further whether judgement is currently low power consumption phase electricity price, if current nor using
Whether electric trough period electricity price it is true then meet future load demand according to the sum of energy storage device residual capacity and the following photovoltaic power generation quantity
Determine K0~K5 current switch states, if being currently low power consumption phase electricity price, further calculates storage electricity price trough period electricity
The residual capacity that energy storage device should have when obtaining maximum return with the following photovoltaic remaining capacity of storage, and determine that K0~K5 works as
Preceding switch state；If judging that energy storage device further discharges whether capacity can answer currently just at peak times of power consumption
To the following possible period of want or need, if it is possible to cope with the following possible period of want or need, then K0~K5 current switch states, which are switched to, makes energy storage device
Discharge the state of capacity to save electric energy, else if energy storage device further discharge capacity cannot be guaranteed reply it is following frequently it
It needs, then K0~K5 current switch states can remain unchanged or be switched to the switch state for remaining unchanged capacity of energy storing device.It should
The detailed process of process can refer to shown in Fig. 6.
Embodiment three:
Distributed photovoltaic energy storage peak shaving system based on power prediction, the method provided, which is suitable for transformation, has energy storage dress
The power supply system set, such as communication base station power supply system, the power supply system with standby UPS are not changing original system power supply knot
Under the premise of structure, by increasing in right amount with photovoltaic array (122), gird-connected inverter (123), grid-connected electric energy meter (124), off-network DC/
DC controller (125), communication unit (126), powder prediction device (127), switch control unit (128) and for realizing
Controlled switch K6, K7, K8 etc. of electric energy scheduling, realize the distributed photovoltaic energy storage peak shaving system for meeting user's primary demand.Figure
It is standard traffic base station power supply system configuration diagram outside dotted line frame in systematic schematic diagram shown in 3, is to utilize the present invention in dotted line frame
The power supply system is transformed in the method for offer, needs to increase the part matching or be transformed, wherein switch K8 be by former power supply system it is non-by
Control switch is substituted for controlled switch, and after above-mentioned transformation, primary standard communication base station power supply system, which upgrades to, has the function of power prediction
Distributed photovoltaic energy storage peak shaving system, communication base station power supply system income level can be greatly improved.
It should be noted that design and implementation method that examples detailed above is of the invention just for the sake of elaboration, it is therefore an objective to make this
Technical staff in field understands particular content of the invention, and can implement the invention like this, can not limit this with this
The protection scope of invention.Therefore, all according to changes or modifications made by the principle of the invention, design, shape, it should all cover in this hair
In bright protection scope.
Claims (6)
1. the distributed photovoltaic energy storage peak shaving system based on power prediction, system is by photovoltaic cells (100), gird-connected inverter
(101), grid-connected electric energy meter (102), gate energy meter (103), power grid (137), off-network DC/DC controller (104), AC/DC control
Device (105) processed, energy storage management system (106), off-network DC/AC controller (107), DC load (108), AC load (109),
Energy storage device (110), powder prediction device (111), switch control unit (112), communication unit (113), controlled switch K0,
K1, K2, K3, K4, K5 composition；Photovoltaic cells (100) are connected with controlled switch K1, K2, the input of gird-connected inverter (101) with by
It controls switch K1 to be connected, gird-connected inverter (101) output is connected with grid-connected electric energy meter (102) input, grid-connected electric energy meter (102) output
It is connected with gate energy meter (103), controlled switch K3, K5, gate energy meter (103) output gets access to grid (137)；Off-network DC/DC
Controller (104) input is connected with controlled switch K2, and output is connected to the input of energy storage management system (106)；AC/DC control
Device (105) input is connected with controlled switch K3, and output is connected to the input of energy storage management system (106)；Off-network DC/AC control
The input of device (107) is connected with the output of energy storage management system (106), and output is connected with controlled switch K4；Controlled switch K4,
K5 is connected after being connected close to AC load (109) side with AC load (109)；The input of DC load (108) by K0 with
The output of energy storage management system (106) is connected；Energy storage device (110) is connected directly with energy storage management system (106)；Power prediction
The output of device (111) is connected with switch control unit (112) input, and RS485/422 bus interface is total by RS485/422
Line respectively with photovoltaic cells (100), energy storage device (110), DC load (108), AC load (109), gate energy meter
(103), the RS485/422 bus interface of communication unit (113) is connected；
It is characterized in that, powder prediction device (111), which obtains photovoltaic cells history run by RS485 bus, safeguards information, straight
Stream load history run safeguards information, the following power distribution information determined, AC load history run maintenance information, future really
Fixed power distribution information, energy storage device history run maintenance information, current remaining capacity information, dispatching of power netwoks, having a power failure arranges
And timesharing time-of-use tariffs information, local photovoltaic power generation historical sample information, local Weather Forecast Information, powder prediction device
(111) switch state that K0~K5 is determined is provided after integrated treatment above- mentioned information, and controls K0 by switch control unit (112)
~K5 switch is opened or closed, to plan that energy storage device residual capacity completes electric energy scheduling in advance；It includes communication unit
(113) information exchange between achievable system and remote server, but its main function is reception system installation ground photovoltaic
Generate electricity historical sample information, Function Fitting method and relevant parameter, and sends it to powder prediction device (111) to be fitted
The functional relation of photovoltaic generation power and weather information, powder prediction device (111) utilize the following Weather Forecast Information, fitting
Functional relation and photovoltaic cells history run safeguard information to determine system future photovoltaic generation power, are collected simultaneously electricity
Net scheduling, power failure arrangement and timesharing time-of-use tariffs, the following power distribution of alternating current-direct current load and energy storage device residual capacity
Relevant information is controlled the achievable following function of state of K0~K5 switch by switch control unit (112): energy storage device being made to exist
The enough memory capacity of advance reservation before distributed photovoltaic peak power arrives, to realize that distributed photovoltaic power generation 100% is spontaneous
It is personal；Energy storage device is set to lay in enough capacity before power failure, to ensure to can use the power generation of distributed photovoltaic off-network after having a power failure
Meet workload demand with the memory capacity of energy storage device itself；So that energy storage device is laid in suitable electric energy in low ebb electricity price, protects
Card future load is using photovoltaic power generation and prestores electricity acquisition maximum gain.
2. the distributed photovoltaic energy storage peak shaving system based on power prediction as described in claim 1, which is characterized in that entire system
System is four-layer structure, and first layer structure includes photovoltaic cells (114), and second layer structure includes power grid end (115), grid-connecting apparatus
(116), off-network device (117), third layer structure include power prediction (121), electric energy scheduling (118), and four-layer structure includes
Energy storage device (119), load (120), wherein power grid end (115) are made of gate energy meter (103) and power grid (137), grid-connected
Device (116) is made of K1, gird-connected inverter (101) and grid-connected electric energy meter (102), and off-network device (117) is by K2, off-network DC/
DC controller (104) composition, power prediction (121) are made of powder prediction device (111) and communication unit (113), electric energy tune
Spend (118) by K0, K3, K4, K5, switch control unit (112), energy storage management system (106), AC/DC controller (105), from
DC/AC controller (107) composition is netted, load (120) is made of DC load (108), AC load (109), and system is by photovoltaic
Unit, grid-connected, off-network, energy storage, power prediction, electric energy scheduling, load are organically combined into an entirety.
3. the distributed photovoltaic energy storage peak shaving system based on power prediction as described in claim 1, which is characterized in that distributed
Photovoltaic is based on grid-connected, supplemented by off-network, only when mains failure, to maximally utilize distributed photovoltaic electric energy, distributed light
Just work is in off-network state for volt, and K1 closure shows that power grid is normal and distributed photovoltaic work or quasi- work are in grid connection state, and K2 is closed
Conjunction shows that power grid has had a power failure and distributed photovoltaic work or quasi- work are in off-network state, K3, K5 nothing closure when K2 is closed
Method is downstream plant power supply, defines K1, K2 and is not simultaneously in closed state at any time, any in K3, K5 when K2 is closed
One cannot be closed state, and K4, K5 are not simultaneously in closed state at any time, and K3, K4 are not in closed form simultaneously
State, 64 kinds of switch states that K0~K5 is constituted exclude in above-mentioned definition after irrealizable switch state, and remaining 24 kinds effective
Switch state.
4. the distributed photovoltaic energy storage peak shaving system based on power prediction as described in claim 1, which is characterized in that realize
Distributed photovoltaic power generation 100% is generated power for their own use, and carrying out electric energy scheduling in advance, detailed process is as follows: powder prediction device (111)
Prediction obtains the following photovoltaic power generation quantity, load power consumption, and obtains current energy storage device remaining capacity, then judges the following photovoltaic
Whether generated energy is greater than future load power consumption, if it is not greater, then the current switch states of K0~K5 can remain unchanged or
It is switched to the switch state for remaining unchanged energy storage device current capacities, otherwise, is then further judged in K0~K5 switch state
Photovoltaic providing auxiliary power amount can be all absorbed using battery in the case where not changing, if battery can absorb photovoltaic
Providing auxiliary power amount, then K0~K5 current switch states, which can be remained unchanged or are switched to, remains unchanged energy storage device current capacities
Switch state, otherwise, K0~K5 current switch states are switched to the state for making energy storage device discharge capacity in advance.
5. the distributed photovoltaic energy storage peak shaving system based on power prediction as described in claim 1, which is characterized in that realize
Meet workload demand using the memory capacity of the power generation of distributed photovoltaic off-network and energy storage device itself after power failure, carries out electric energy in advance
Detailed process is as follows for scheduling: photovoltaic power generation quantity, load power consumption after the following power failure of powder prediction device (111) prediction, and obtains
Current energy storage device remaining capacity is taken, then judges after following have a power failure whether are the sum of photovoltaic power generation quantity and energy storage device current electric quantity
Greater than the following power failure afterload power consumption, keep energy storage device logical if it is not greater, then the current switch states of K0~K5 are switched to
The state of the preparatory idle capacity of alternating current is crossed, otherwise, the current switch states of K0~K5, which can be remained unchanged or are switched to, fills energy storage
Set the switch state that capacity remains unchanged.
6. the distributed photovoltaic energy storage peak shaving system based on power prediction as described in claim 1, which is characterized in that realize
Using time-of-use tariffs peak load shifting function, carrying out electric energy scheduling in advance, detailed process is as follows: powder prediction device (111) is first
Current power price is obtained, and judges whether be currently peak times of power consumption electricity price, if being currently not peak times of power consumption electricity price,
Further whether judgement is currently low power consumption phase electricity price, if currently nor low power consumption phase electricity price, fills according to energy storage
Set whether the sum of residual capacity and the following photovoltaic power generation quantity meet the determination of future load demand
K0~K5 current switch states further calculate storage electricity price trough period electricity if being currently low power consumption phase electricity price
Amount and the residual capacity that energy storage device should have when storing the following photovoltaic remaining capacity acquisition maximum return, and determine K0~K5
Current switch states；If judging that energy storage device further discharges capacity and whether can currently just at peak times of power consumption
Cope with the following possible period of want or need, if it is possible to cope with the following possible period of want or need, then K0~K5 current switch states, which are switched to, fills energy storage
The state of release capacity is set to save electric energy, else if energy storage device, which further discharges capacity, cannot be guaranteed that reply is following frequently
Need, then K0~K5 current switch states can remain unchanged or be switched to the switch state for remaining unchanged capacity of energy storing device.
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