CN112821418B - Optical storage and charging multi-target power dynamic adjustment system and method - Google Patents
Optical storage and charging multi-target power dynamic adjustment system and method Download PDFInfo
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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
- H02J3/24—Arrangements for preventing or reducing oscillations of power in networks
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
- B60L53/00—Methods of charging batteries, specially adapted for electric vehicles; Charging stations or on-board charging equipment therefor; Exchange of energy storage elements in electric vehicles
- B60L53/60—Monitoring or controlling charging stations
- B60L53/63—Monitoring or controlling charging stations in response to network capacity
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
- B60L53/00—Methods of charging batteries, specially adapted for electric vehicles; Charging stations or on-board charging equipment therefor; Exchange of energy storage elements in electric vehicles
- B60L53/60—Monitoring or controlling charging stations
- B60L53/64—Optimising energy costs, e.g. responding to electricity rates
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
- B60L53/00—Methods of charging batteries, specially adapted for electric vehicles; Charging stations or on-board charging equipment therefor; Exchange of energy storage elements in electric vehicles
- B60L53/60—Monitoring or controlling charging stations
- B60L53/67—Controlling two or more charging stations
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
- B60L55/00—Arrangements for supplying energy stored within a vehicle to a power network, i.e. vehicle-to-grid [V2G] arrangements
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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
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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
- H02J3/322—Arrangements for balancing of the load in a network by storage of energy using batteries with converting means the battery being on-board an electric or hybrid vehicle, e.g. vehicle to grid arrangements [V2G], power aggregation, use of the battery for network load balancing, coordinated or cooperative battery charging
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J3/00—Circuit arrangements for ac mains or ac distribution networks
- H02J3/38—Arrangements for parallely feeding a single network by two or more generators, converters or transformers
- H02J3/381—Dispersed generators
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J3/00—Circuit arrangements for ac mains or ac distribution networks
- H02J3/38—Arrangements for parallely feeding a single network by two or more generators, converters or transformers
- H02J3/388—Islanding, i.e. disconnection of local power supply from the network
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- 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
- H02J2300/00—Systems for supplying or distributing electric power characterised by decentralized, dispersed, or local generation
- H02J2300/20—The dispersed energy generation being of renewable origin
- H02J2300/22—The renewable source being solar energy
- H02J2300/24—The renewable source being solar energy of photovoltaic origin
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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
- H02J2310/00—The network for supplying or distributing electric power characterised by its spatial reach or by the load
- H02J2310/40—The network being an on-board power network, i.e. within a vehicle
- H02J2310/48—The network being an on-board power network, i.e. within a vehicle for electric vehicles [EV] or hybrid vehicles [HEV]
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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
- H02J2310/00—The network for supplying or distributing electric power characterised by its spatial reach or by the load
- H02J2310/50—The network for supplying or distributing electric power characterised by its spatial reach or by the load for selectively controlling the operation of the loads
- H02J2310/56—The network for supplying or distributing electric power characterised by its spatial reach or by the load for selectively controlling the operation of the loads characterised by the condition upon which the selective controlling is based
- H02J2310/62—The condition being non-electrical, e.g. temperature
- H02J2310/64—The condition being economic, e.g. tariff based load management
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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
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B70/00—Technologies for an efficient end-user side electric power management and consumption
- Y02B70/30—Systems integrating technologies related to power network operation and communication or information technologies for improving the carbon footprint of the management of residential or tertiary loads, i.e. smart grids as climate change mitigation technology in the buildings sector, including also the last stages of power distribution and the control, monitoring or operating management systems at local level
- Y02B70/3225—Demand response systems, e.g. load shedding, peak shaving
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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
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T10/00—Road transport of goods or passengers
- Y02T10/60—Other road transportation technologies with climate change mitigation effect
- Y02T10/70—Energy storage systems for electromobility, e.g. batteries
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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
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T10/00—Road transport of goods or passengers
- Y02T10/60—Other road transportation technologies with climate change mitigation effect
- Y02T10/7072—Electromobility specific charging systems or methods for batteries, ultracapacitors, supercapacitors or double-layer capacitors
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- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T90/00—Enabling technologies or technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02T90/10—Technologies relating to charging of electric vehicles
- Y02T90/12—Electric charging stations
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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
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- Y04S20/00—Management or operation of end-user stationary applications or the last stages of power distribution; Controlling, monitoring or operating thereof
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Abstract
The invention discloses a dynamic regulating system and a method for optical storage and charging multi-target power, which are characterized in that: the regulating system comprises a control layer and an equipment layer, wherein the equipment layer comprises a plurality of photovoltaic power generation systems, a plurality of energy storage systems and a plurality of charging piles, the control layer comprises an optical storage and charging coordination controller, the optical storage and charging coordination controller is used for collecting output power information of each equipment of the equipment layer and controlling power of each equipment of the equipment layer in real time, so that the power difference between the actual power value interacted between the optical storage and charging systems and a power grid and the set power value tends to zero. The invention can self-define the energy flow value between the optical storage system and the power grid, can be used for an off-grid system and a grid-connected system, has wide application scene, and can flexibly set the target energy flow value of the optical storage system at a grid-connected point; the adjustment is quick and accurate and the real-time performance is good. The optical storage and filling integrated system not only utilizes the generated energy of renewable energy to the maximum extent, but also has good economic benefit.
Description
Technical Field
The invention relates to a dynamic regulation system and a method for optical storage and filling multi-target power, in particular to a dynamic coordination control system and a method for multi-target optical storage and filling power, and belongs to the technical field of optical storage and filling micro-grid control systems.
Background
With the increasing popularization of electric vehicles, more and more charging piles are installed in public places such as residential communities, parking lots and power exchange stations, but the fact that the excessive charging piles are connected into a power grid possibly exceeds the capacity limit value of a power grid transformer, damage is caused to the power grid, and the load of the electric vehicles has the characteristics of certain randomness, dispersibility and the like.
Disclosure of Invention
The invention aims to solve the technical problems that: the power coordination control of a plurality of targets of the optical storage and filling system is realized, and a set of power coordination method for dynamic adjustment is provided.
In order to solve the above problems, the technical solution of the present invention is to provide a dynamic adjusting system for optical storage and charging multi-target power, which is characterized in that: the device comprises a control layer and a device layer, wherein the device layer comprises a plurality of photovoltaic power generation systems, a plurality of energy storage systems and a plurality of charging piles, the control layer comprises an optical storage charging coordination controller, the optical storage charging coordination controller is used for collecting output power information of each device of the device layer and controlling power of each device of the device layer in real time, and the power difference between the actual power value interacted between the optical storage charging systems and a power grid and the set power value tends to be zero.
Preferably, the power coordination control system further comprises a scheduling layer, wherein the scheduling layer is used for making a power coordination target and giving an instruction to the control layer, and the control layer controls the power of each device of the device layer in real time according to the instruction of the scheduling layer.
Preferably, the light storage and charge coordination controller comprises a power coordination main unit, a photovoltaic power coordination subunit, an energy storage power coordination subunit and a charging pile power coordination subunit, wherein the power coordination main unit distributes the power difference between the actual power value interacted between the light storage and charge system and the power grid and the set power value to the photovoltaic power coordination subunit, the energy storage power coordination subunit and the charging pile power coordination subunit, and the photovoltaic power coordination subunit, the energy storage power coordination subunit and the charging pile power coordination subunit distribute the distributed power difference to a plurality of photovoltaic power generation systems, a plurality of energy storage systems and a plurality of charging piles of an equipment layer as power adjustment values to control the power of the photovoltaic power generation systems, the energy storage systems and the charging piles in real time.
The invention also provides a dynamic regulating method for the optical storage and filling multi-target power, which is applied to the dynamic regulating system for the optical storage and filling multi-target power and is characterized in that:
setting the power deficiency as the power deficiency when the power difference between the power value and the actual power value interacted between the optical storage and charging system and the power grid is more than 0; setting the power difference between the power value and the actual power value interacted between the optical storage and charging system and the power grid as the power excess when the power difference is less than 0;
the power coordination main unit decides the priority of the control of the photovoltaic power generation systems, the energy storage systems and the charging piles of the equipment layer according to whether the current power is excessive or insufficient;
the power shortage situation is ordered according to priority level:
photovoltaic power coordination subunit: reducing the power-limited operation of the photovoltaic power generation system, even at maximum power;
an energy storage power coordination subunit: the charging and even discharging of the energy storage system are reduced;
charging pile power coordination subunit: limiting the output power of the charging pile;
the power excess is ranked according to priority level:
charging pile power coordination subunit: the output power of the charging pile is reduced and limited, and even the output power of the charging pile is not limited at all;
an energy storage power coordination subunit: the discharge and even the charge of the energy storage system are reduced;
photovoltaic power coordination subunit: the photovoltaic power generation system operates in a power-limited mode;
the priorities of the individual photovoltaic power generation systems, the individual energy storage systems and the individual charging pile control are determined by the photovoltaic power coordination subunit, the energy storage power coordination subunit and the charging pile power coordination subunit.
Preferably, in the event of a power shortage, the photovoltaic power coordination subunit is assigned to a differential power regulation value:
ΔP 1set ＝MIN(ΔP 1posmax ,ΔP set )，
wherein the method comprises the steps of
ΔP 1posmax P being the maximum value of forward output power of the plurality of photovoltaic power generation systems with highest priority i amount A is the maximum power of the ith photovoltaic power generation system i % is the limit power percentage of the ith photovoltaic power generation system, delta P set The power difference between the actual power value interacted between the optical storage and charging system and the power grid and the set power value is obtained, and n is the total number of the photovoltaic power generation systems;
the stored energy power coordination subunit assigns to the differential power adjustment value:
ΔP 2set ＝MIN(ΔP 2posmax ,ΔP set -ΔP 1set )，
wherein the method comprises the steps of
ΔP 2posmax Maximum forward output power of the second priority energy storage systems, P i amount Maximum discharge power of energy storage system, P i The real-time output power of the ith energy storage system is obtained, and n is the total number of the energy storage systems;
the charging pile power coordination subunit is allocated to the differential power adjustment value:
ΔP 3set ＝MIN(ΔP 3posmax ,-ΔP set -ΔP 1set ΔP 2set )，
wherein the method comprises the steps of
ΔP 3posmax Maximum value of forward output power of the third priority charging piles, P i The real-time charging power of the ith charging pile is calculated, and n is the total number of the charging piles;
in the case of power excess, the charging pile power coordination subunit allocates an excess power adjustment value to:
ΔP 1set ＝MAX(ΔP 1negmax ,ΔP set )，
wherein the method comprises the steps of
Wherein P is i amount The real-time charging power of the ith charging pile is a negative value, n is the total number of the charging piles, a i % is the limited power percentage of the ith charging pile; if a of each i Percent=100%, i.e. without limiting power, then=p 1negmax Δ0；ΔP set The power difference between the actual power value interacted between the optical storage and charging system and the power grid and the set power value is obtained;
the difference power adjustment value assigned by the stored energy power coordination subunit:
ΔP 2set ＝MAX(ΔP 2negmax ,ΔP set -ΔP 1set )，
wherein the method comprises the steps of
At this time P i amount Maximum charging power of energy storage system, P i The real-time output power of the ith energy storage system is positive and negative, namely discharging and charging, and n is the total number of the energy storage systems;
differential power adjustment value assigned by the photovoltaic power coordination subunit:
＝P 3set ΔMAX(ΔP 3negmax ,ΔP set -ΔP 1set -ΔP 2set )，
wherein the method comprises the steps of
ΔP 3negmax P being the maximum value of forward output power of the third priority multiple photovoltaic power generation systems i The real-time power generation power of the ith photovoltaic power generation system, and n is the total number of the photovoltaic power generation systems.
Preferably, the scheduling layer makes a power coordination target and issues an instruction, and the control layer runs a power coordination algorithm according to the instruction of the scheduling layer to control the power of each device of the device layer in real time.
Compared with the prior art, the invention has the beneficial effects that:
according to the invention, after the photovoltaic system is connected into a power grid, the generated electric quantity is supplied to the charging pile to be consumed on site, so that the power supply pressure of the power grid is slowed down, meanwhile, due to the existence of actual conditions such as peak-valley electricity price difference and the like, after the energy storage system is added, the power coordination and the energy storage of the photovoltaic system and the charging pile are carried out through the coordination controller to carry out orderly management, and the bidirectional flow of energy between the optical storage and charging system and the power grid can be realized, so that the maximum economic benefit is realized.
The invention can self-define the energy flow value between the self-defined and the power grid, is also suitable for areas without power grid access, forms an optical storage charging grid system for self-use of electric energy, can be used for the off-grid system and the grid-connected system, has wide application scene, and can flexibly set the target energy flow value of the optical storage charging system at the grid-connected point; the adjustment is quick and accurate and the real-time performance is good. The optical storage and filling integrated system not only utilizes the generated energy of renewable energy to the maximum extent, but also has good economic benefit.
Drawings
FIG. 1 is a schematic diagram of a dynamic optical storage and filling system with multiple target power;
FIG. 2 is a schematic diagram of an optical storage and retrieval system;
FIG. 3 is a schematic diagram of a method for dynamically adjusting multiple target power of an optical storage battery in the case of power shortage;
Detailed Description
In order to make the invention more comprehensible, preferred embodiments accompanied with figures are described in detail below.
The invention discloses a structure diagram of a light storage and charge multi-target power dynamic regulating system, which is shown in figure 1, wherein the system is divided into three layers, an equipment layer is formed by a plurality of photovoltaic power generation systems, a plurality of energy storage systems and a plurality of charging piles, a light storage and charge coordination controller is a control layer, and an upper dispatching system is a dispatching layer. The optical storage and charge coordination controller collects information of the equipment layer, operates a power coordination algorithm according to instructions of the scheduling layer, and controls the equipment in real time. In the three-layer structure, if the objective of the optical storage and charging coordination controller is fixed, for example, an optical storage and charging network system, an upper layer scheduling system can be omitted. The upper layer scheduling system makes a power coordination target and gives an instruction.
Fig. 2 is a schematic diagram of an optical storage charging primary system, in which arrows represent directions of energy flow, a photovoltaic power generation system transmits power to a bus, a charging pile absorbs electric energy, and an energy storage system is a bidirectional regulation system. The invention relates to a method for dynamically adjusting optical storage and charging multi-target power, which aims to adjust the power value P of a grid-connected point to be a target value P set If the system is an off-grid system, P set =0. The upper layer dispatch system makes the target value, if P set If more than 0, the energy flows to a large power grid in the positive direction, otherwise P set And less than 0, absorbing electric energy from a large power grid, and taking the negative direction.
The dynamic power coordination algorithm introduces:
power P and set power value P of the point of parallel connection set Δp=p set -P, wherein P is the power value of the interaction between the actual optical storage and filling system and the grid. Δp > 0 is considered to be a power deficit and Δp < 0 is considered to be a power excess.
The final control objective of the power coordination control algorithm is to make Δp→0. The algorithm can be divided into a power coordination main unit and a power coordination sub-unit. The power coordination master unit calculates the power difference delta P set =Δp is assigned to each power coordination subunit, each power coordination subunit adjusts the assigned differential power by Δp nset Assigned to the sub-units of the device layer.
The power coordination main unit and the power coordination sub-unit can select various control algorithms, such as an average control algorithm, a priority control algorithm, a PID control algorithm, a speed fastest control algorithm and the like. In the invention, a priority control algorithm is introduced, and a power coordination main unit decides the priority of each subunit control of a device layer according to whether the power is over or power shortage currently. For example, when the power is excessive, the power coordination main unit decides whether to limit the power of the photovoltaic power generation system or charge the energy storage system. The priority of individual devices in the device layer sub-units is determined by each power coordination sub-unit, for example, 10 sets of photovoltaic power generation systems, and the priority of power limitation of the 10 sets of photovoltaic power generation systems is determined by the photovoltaic power coordination sub-units.
There are 3 power coordinations in the algorithmSubunit: the photovoltaic power coordination subunit, the energy storage power coordination subunit and the charging pile power coordination subunit. See fig. 3, for an example of power shortage, prioritization: the photovoltaic power coordination subunit distributes the differential power adjustment value > the differential power adjustment value distributed by the energy storage power > the differential power adjustment value distributed by the charging pile, namely the priority order is as follows: ΔP 1set ＞ΔP 2set ＞ΔP 3set 。
The power coordination control method is simple, and under the condition of power shortage, the photovoltaic power generation system generates power as much as possible, the energy storage system discharges, and the charging pile operates with limited power. Under the condition of excess power, the photovoltaic power generation system is limited to generate power, the energy storage system is used for charging, and the charging pile operates at maximum power. However, in both cases, the priorities of the subunits are different, so that the description of the two cases of the split power deficiency and the excess power is now presented.
The power shortage situation is ordered according to priority level:
1) Photovoltaic power coordination subunit: the photovoltaic limited power operation is reduced, even at maximum power.
2) An energy storage power coordination subunit: and reduces the charge and even discharge of the stored energy.
3) Charging pile power coordination subunit: limiting the output power of the charging pile.
The power excess is ranked according to priority level:
1) Charging pile power coordination subunit: reducing the output power of the limited charging pile is even completely unlimited.
2) An energy storage power coordination subunit: reducing the discharge and even the charge of the stored energy.
3) Photovoltaic control subunit: photovoltaic limited power operation.
Fig. 2 illustrates an example of power shortage, where the photovoltaic priority is highest, the control of the charging pile is lowest, and the sequence is reversed if the charging pile is in excess.
The dynamic regulation of power is described below by taking power shortage as an example.
If ΔP > 0, the system power is absent, and each device subsystem requires more power or reduces less power consumption. The priority control algorithm is as follows:
1) Power coordination unit 1 differential power adjustment value distributed by photovoltaic power coordination subunit
ΔP 1set ＝MIN(ΔP 1posmax ,ΔP set ),
2) Power coordination unit 2. Differential power adjustment value to which stored power is distributed
ΔP 2set ＝MIN(ΔP 2posmax ,ΔP set -ΔP 1set ),
3) The power coordination unit 3 is used for adjusting the target power of the differential power adjustment value distributed by the charging pile
ΔP 3set ＝MIN(ΔP 3posmax ,ΔP set -ΔP 1set -ΔP 2set ),
Wherein DeltaP 1posmax The maximum forward output power of the unit with the highest priority, that is to say the maximum power that the photovoltaic subsystem can currently output outwards, is calculated by the system in real time and adjusted in real time,
wherein P is i amount The maximum power of the ith photovoltaic power generation, n is the total number of photovoltaic power generation systems, a i % is the ith photovoltaic power limit percentage, if a of each i Percent=100%, i.e. without limiting power, Δp 1posmax =0. The subsystem of the energy storage system of the same kind as the second priority also calculates +.>
At this time P i amount Maximum discharge power of energy storage system, P i The real-time output power of the ith energy storage system is positive and negative, and the total number of the energy storage systems is n. Likewise, the charging pile is a subsystem of the third priority class +.>
P i And the real-time charging power of the ith charging pile is equal to the total number of the charging piles.
And if the power is excessive, the adjusting process is reverse.
The dynamic adjustment procedure in case of power excess follows.
If ΔP < 0, the system power is exceeded, and each device subsystem needs to reduce the multiple power or consume the power to the maximum. The priority control algorithm is as follows:
1) And the power coordination unit 1 distributes the charging pile power coordination subunit to the excess power regulation value.
ΔP 1set ＝MAX(ΔP 1negmax ,ΔP set ),
2) Power coordination unit 2. Differential power adjustment value to which stored power is distributed
ΔP 2set ＝MAX(ΔP 2negmax ,ΔP set -ΔP 1set ),
3) The power coordination unit 3 is used for adjusting the excess power distributed by the photovoltaic power coordination subunit
ΔP 3set ＝MAX(ΔP 3negmax ,ΔP set -ΔP 1set -ΔP 2set ),
Wherein DeltaP 1negmax The maximum value of the forward output power of the unit with the highest priority, that is to say the maximum power that the charging pile system can absorb at present, is calculated and adjusted in real time by the system in real time.
Wherein P is i amount The real-time charging power of the ith charging pile is a negative value, n is the total number of the charging piles, a i % is the power limit percentage of the ith charging pile. If a of each i Percent=100%, i.e. without limiting power, Δp 1negmax =0. The subsystem with the same energy storage system as the second priority is also calculated according to the method
At this time P i amount Maximum charging power of energy storage system, P i The real-time output power of the ith energy storage system is positive and negative, and the total number of the energy storage systems is n. Also, lightThe volt-age system is the subsystem of the third priority level +.>
P i The real-time power of the ith photovoltaic power generation system is obtained, and n is the total number of the photovoltaic power generation systems.
The output power of each device is acquired and calculated in real time by the controller in millisecond level through industrial communication, the value is updated in real time, and the target regulating value is also updated in real time until the system target value is met.
According to the control method provided by the invention, the output power target value of the optical storage and charging system can be set and changed according to different application scenes and requirements, the power target value of each equipment subsystem is adjusted in real time according to the power generation condition of the photovoltaic, the residual energy of energy storage and the charging condition of the charging pile, the response of the system can reach millisecond level, the power generation or power consumption of all equipment is collected in real time, the bidirectional regulation power value can be calculated in real time, and the bidirectional flow of the power with the power grid according to a plurality of targets is realized.
Claims (4)
1. The utility model provides a light stores up and fills multi-target power dynamic adjustment method, uses a light to store up and fills multi-target power dynamic adjustment system, its characterized in that: the optical storage charging multi-target power dynamic regulation system comprises a control layer and an equipment layer, wherein the equipment layer comprises a plurality of photovoltaic power generation systems, a plurality of energy storage systems and a plurality of charging piles, the control layer comprises an optical storage charging coordination controller, the optical storage charging coordination controller is used for collecting output power information of each equipment of the equipment layer and controlling the power of each equipment of the equipment layer in real time, so that the power difference between the actual power value interacted between the optical storage charging system and a power grid and the set power value tends to zero;
setting the power deficiency as the power deficiency when the power difference between the power value and the actual power value interacted between the optical storage and charging system and the power grid is more than 0; setting the power difference between the power value and the actual power value interacted between the optical storage and charging system and the power grid as the power excess when the power difference is less than 0;
the power coordination main unit decides the priority of the control of the photovoltaic power generation systems, the energy storage systems and the charging piles of the equipment layer according to whether the current power is excessive or insufficient;
the power shortage situation is ordered according to priority level:
photovoltaic power coordination subunit: reducing the power-limited operation of the photovoltaic power generation system, even at maximum power;
an energy storage power coordination subunit: the charging and even discharging of the energy storage system are reduced;
charging pile power coordination subunit: limiting the output power of the charging pile;
the power excess is ranked according to priority level:
charging pile power coordination subunit: the output power of the charging pile is reduced and limited, and even the output power of the charging pile is not limited at all;
an energy storage power coordination subunit: the discharge and even the charge of the energy storage system are reduced;
photovoltaic power coordination subunit: the photovoltaic power generation system operates in a power-limited mode;
the priority of the control of the single photovoltaic power generation system, the single energy storage system and the single charging pile is determined by the photovoltaic power coordination subunit, the energy storage power coordination subunit and the charging pile power coordination subunit;
in the event of a power deficit, the photovoltaic power coordination subunit assigns to the differential power regulation value:
ΔP 1set ＝MIN(ΔP 1posmax ,ΔP set )，
wherein the method comprises the steps of
ΔP 1posmax P being the maximum value of forward output power of the plurality of photovoltaic power generation systems with highest priority i amount A is the maximum power of the ith photovoltaic power generation system i % is the limit power percentage of the ith photovoltaic power generation system, delta P set The power difference between the actual power value interacted between the optical storage and charging system and the power grid and the set power value is obtained, and n is the total number of the photovoltaic power generation systems;
the stored energy power coordination subunit assigns to the differential power adjustment value:
ΔP 2set ＝MIN(ΔP 2posmax ,ΔP set -ΔP 1set )，
wherein the method comprises the steps of
ΔP 2posmax Maximum forward output power of the second priority energy storage systems, P i amount Maximum discharge power of energy storage system, P i The real-time output power of the ith energy storage system is obtained, and n is the total number of the energy storage systems;
the charging pile power coordination subunit is allocated to the differential power adjustment value:
ΔP 3set ＝MIN(ΔP 3posmax ,ΔP set -ΔP 1set -ΔP 2set )，
wherein the method comprises the steps of
ΔP 3posmax Maximum value of forward output power of the third priority charging piles, P i The real-time charging power of the ith charging pile is calculated, and n is the total number of the charging piles;
in the case of power excess, the charging pile power coordination subunit allocates an excess power adjustment value to:
ΔP 1set ＝MAX(ΔP 1negmax ,ΔP set )，
wherein the method comprises the steps of
Wherein P is i amount The real-time charging power of the ith charging pile is a negative value, n is the total number of the charging piles, a i % is the limited power percentage of the ith charging pile; if a of each i Percent=100%, i.e. without limiting power, Δp 1negmax ＝0；ΔP set The power difference between the actual power value interacted between the optical storage and charging system and the power grid and the set power value is obtained;
the difference power adjustment value assigned by the stored energy power coordination subunit:
ΔP 2set ＝MAX(ΔP 2negmax ,ΔP set -ΔP 1set )，
wherein the method comprises the steps of
At this time P i amount Maximum charging power of energy storage system, P i The real-time output power of the ith energy storage system is positive and negative, namely discharging and charging, and n is the total number of the energy storage systems;
differential power adjustment value assigned by the photovoltaic power coordination subunit:
ΔP 3set ＝MAX(ΔP 3negmax ,ΔP set -ΔP 1set -ΔP 2set )，
wherein the method comprises the steps of
ΔP 3negmax P being the maximum value of forward output power of the third priority multiple photovoltaic power generation systems i The real-time power generation power of the ith photovoltaic power generation system, and n is the total number of the photovoltaic power generation systems.
2. The method for dynamically adjusting the power of a plurality of optical storage and charging targets according to claim 1, wherein the method comprises the following steps: and the control layer operates a power coordination algorithm according to the instruction of the scheduling layer to control the power of each device of the device layer in real time.
3. The method for dynamically adjusting the power of a plurality of optical storage and charging targets according to claim 1, wherein the method comprises the following steps: the power control system further comprises a scheduling layer, wherein the scheduling layer is used for making a power coordination target and giving an instruction to the control layer, and the control layer controls the power of each device of the device layer in real time according to the instruction of the scheduling layer.
4. The method for dynamically adjusting the power of a plurality of optical storage and charging targets according to claim 1, wherein the method comprises the following steps: the photovoltaic storage and charging coordination controller comprises a power coordination main unit, a photovoltaic power coordination subunit, an energy storage power coordination subunit and a charging pile power coordination subunit, wherein the power coordination main unit distributes the power difference of the actual power value and the set power value interacted between the photovoltaic storage and charging system and the power grid to the photovoltaic power coordination subunit, the energy storage power coordination subunit and the charging pile power coordination subunit, and the photovoltaic power coordination subunit, the energy storage power coordination subunit and the charging pile power coordination subunit distribute the distributed power difference to a plurality of photovoltaic power generation systems, a plurality of energy storage systems and a plurality of charging piles of a device layer as power regulation values to control the power of the photovoltaic power generation systems, the energy storage systems and the charging piles in real time.
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