CN204168208U - A kind of photovoltaic micro networking - Google Patents
A kind of photovoltaic micro networking Download PDFInfo
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- CN204168208U CN204168208U CN201420673336.XU CN201420673336U CN204168208U CN 204168208 U CN204168208 U CN 204168208U CN 201420673336 U CN201420673336 U CN 201420673336U CN 204168208 U CN204168208 U CN 204168208U
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- H02J3/383—
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J3/00—Circuit arrangements for ac mains or ac distribution networks
- H02J3/28—Arrangements for balancing of the load in a network by storage of energy
- H02J3/30—Arrangements for balancing of the load in a network by storage of energy using dynamo-electric machines coupled to flywheels
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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
- H02J9/00—Circuit arrangements for emergency or stand-by power supply, e.g. for emergency lighting
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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
Abstract
The utility model provides a kind of photovoltaic micro networking, and described photovoltaic micro networking comprises: multiple micro-capacitance sensor submodule, and described micro-capacitance sensor submodule comprises: current transformer; The photovoltaic array be connected with described current transformer; The storage battery be connected with described current transformer; The load be connected with described current transformer; The accumulated energy flywheel be connected with described current transformer; Wherein, described accumulated energy flywheel is for reducing or eliminate the fluctuation of described current transformer power output; Described current transformer is connected with power supply grid by described accumulated energy flywheel.By controlling the operating state of described current transformer and described accumulated energy flywheel, can reduce or eliminate the fluctuation of described current transformer power output, ensure that the stable of current transformer power output, avoiding the damage to load and storage battery.
Description
Technical field
The utility model relates to photovoltaic power supply technical field, in particular, relates to a kind of photovoltaic micro networking.
Background technology
Micro-capacitance sensor has two kinds of operational modes usually, and a kind of operational mode is incorporated into the power networks with bulk power grid, and micro-capacitance sensor accepts the scheduling of bulk power grid as a controlled scheduling unit of bulk power grid.Another kind is from network operation when island effect.Described island effect refers to a distributed generation system, as photovoltaic generating system, continues the situation to load transmission of electric energy when power breakdown appears in bulk power grid.
The micro-capacitance sensor that photovoltaic array is formed is now common a kind of micro-capacitance sensor structure, and it establishes one's own system, and has self-balancing ability and can the advantage such as autonomous operation.But because photovoltaic array is by the situation such as illumination effect and power supply grid voltage fluctuation, all can causes the fluctuation of current transformer power output, thus damage is caused to load and storage battery.
Utility model content
For solving the problem, this application provides a kind of photovoltaic micro networking, ensure that the stable of current transformer power output, avoiding the damage to load and storage battery.
For achieving the above object, this application provides a kind of photovoltaic micro networking, the multiple micro-capacitance sensor submodule of this photovoltaic micro networking, described micro-capacitance sensor submodule comprises:
Current transformer;
The photovoltaic array be connected with described current transformer;
The storage battery be connected with described current transformer;
The load be connected with described current transformer;
The accumulated energy flywheel be connected with described current transformer;
Wherein, described accumulated energy flywheel is for reducing or eliminate the fluctuation of described current transformer power output; Described current transformer is connected with power supply grid by described accumulated energy flywheel.
Preferably, in above-mentioned photovoltaic micro networking, described micro-capacitance sensor submodule also comprises: generator;
Wherein, described generator is connected with described current transformer and described load respectively.
Preferably, in above-mentioned photovoltaic micro networking, described generator is gas electricity generator.
Preferably, in above-mentioned photovoltaic micro networking, when described micro-capacitance sensor submodule and described power supply grid conducting are incorporated into the power networks, described current transformer and described accumulated energy flywheel power operation with closed ring, described accumulated energy flywheel is for realizing and the controlled PQ nodal function of described power supply grid access point or peak regulating function.
Preferably, in above-mentioned photovoltaic micro networking, when described micro-capacitance sensor submodule and described power supply grid open circuit are from network operation, described current transformer and described accumulated energy flywheel do voltage close loop and run, and described accumulated energy flywheel is for realizing voltage support and the energy balance of described micro-capacitance sensor submodule.
Preferably, in above-mentioned photovoltaic micro networking, also comprise: warning device, described warning device is reported to the police when described photovoltaic array generated output is less than setting power and/or described storage battery electric energy is discharged into setting threshold.
Preferably, in above-mentioned photovoltaic micro networking, the AC of described current transformer is 380V ac bus, and its DC side is 750V DC bus.
Preferably, in above-mentioned photovoltaic micro networking, described current transformer is energy storage inverter.
Known by foregoing description, the micro-grid that the application provides comprises multiple micro-capacitance sensor submodule, and described micro-capacitance sensor submodule comprises: current transformer; The photovoltaic array be connected with described current transformer; The storage battery be connected with described current transformer; The load be connected with described current transformer; The accumulated energy flywheel be connected with described current transformer; Wherein, described accumulated energy flywheel is for reducing or eliminate the fluctuation of described current transformer power output; Described current transformer is connected with power supply grid by described accumulated energy flywheel.By controlling the operating state of described current transformer and described accumulated energy flywheel, can reduce or eliminate the fluctuation of described current transformer power output, ensure that the stable of current transformer power output, avoiding the damage to load and storage battery.
Accompanying drawing explanation
In order to be illustrated more clearly in the utility model embodiment or technical scheme of the prior art, be briefly described to the accompanying drawing used required in embodiment or description of the prior art below, apparently, accompanying drawing in the following describes is only embodiment of the present utility model, for those of ordinary skill in the art, under the prerequisite not paying creative work, other accompanying drawing can also be obtained according to the accompanying drawing provided.
The structural representation of a kind of photovoltaic micro networking that Fig. 1 provides for the embodiment of the present application;
The structural representation of a kind of EMS that Fig. 2 provides for the embodiment of the present application.
Embodiment
Below in conjunction with the accompanying drawing in the utility model embodiment, be clearly and completely described the technical scheme in the utility model embodiment, obviously, described embodiment is only the utility model part embodiment, instead of whole embodiments.Based on the embodiment in the utility model, those of ordinary skill in the art are not making the every other embodiment obtained under creative work prerequisite, all belong to the scope of the utility model protection.
As stated in the Background Art, for the very tired micro-capacitance sensor formed of photovoltaic, due to change, the power supply grid trouble light problem of intensity of illumination, the larger fluctuation of the operating current provided for load all can be provided, thus damage is caused to load and storage battery.
For solving the problem, the embodiment of the present application provides a kind of photovoltaic micro networking, with reference to the structural representation of a kind of described photovoltaic micro networking that figure 1, Fig. 1 provides for the embodiment of the present application.
Described photovoltaic micro networking comprises multiple micro-capacitance sensor submodule 10, and described micro-capacitance sensor submodule 10 comprises: current transformer 11, photovoltaic array 12, storage battery 13, load 14 and accumulated energy flywheel 15.
Wherein, described photovoltaic array 12, storage battery 13, load 14 and accumulated energy flywheel 15 are all connected with described current transformer 11.Described current transformer 11 is connected with power supply grid 2 by described accumulated energy flywheel 15.
Photovoltaic micro networking described in the embodiment of the present application can be provided with described accumulated energy flywheel 15, described accumulated energy flywheel 15 is for reducing or eliminating the fluctuation that described current transformer defeated 11 goes out power, and then ensure the stable of its power output, avoid the damage because its power fluctuation causes load 14 and storage battery 13.Described current transformer 11 is three level four bridge legs current transformer, so that be connected with described photovoltaic array 12, storage battery 13 and load 14 respectively.
In described photovoltaic micro networking, described micro-capacitance sensor sub-net module 10 has two kinds of mode of operations: with grid-connect mode during described power supply grid 2 conducting and when disconnecting with described power supply grid 2 from net pattern.
When grid-connect mode, described micro-capacitance sensor submodule 10 and the conducting of described power supply grid 2.When illumination abundance, the direct current that photovoltaic array 12 generates changes the alternating current that do not set for described load 14 by described current transformer 11, more than part be stored in described accumulated energy flywheel 15 and described storage battery 13.After the two is filled with electricity, described micro-capacitance sensor submodule 10 can also be powered to other AC load local and power supply grid 2.By controlling the slewing rate of described accumulated energy flywheel 15, the quality of electric energy can be ensured, meeting national standard requirement at relevant parameters such as harmonic wave, voltage deviation, voltage unbalance factor, voltage fluctuation and flickerings.
When photovoltaic array 12 does not generate electricity or generated output is less than setting power, by described storage battery 13 and described accumulated energy flywheel 15 for described load 14 provides electric energy, be transformed into through described current transformer 11 alternating current meeting power quality standard, described load 14 is powered.
The respond of the instantaneous discharge and recharge of described storage battery 13 is poor; because photovoltaic generation is subject to the larger characteristic of illumination high light impact fluctuation; the badly damaged described storage battery 13 of meeting; affect its useful life; with arranging described accumulated energy flywheel 15, the momentary high power fluctuation utilizing the capability of fast response of its discharge and recharge and power density high feature to export to stabilize photovoltaic, protects described storage battery 13; renewable energy utilization rate can be improved, realize electrical network optimized operation.
Under the pattern of being incorporated into the power networks, if described photovoltaic array 12 generated output is less than setting power, and described storage battery 13 electric energy is discharged into setting threshold, when the electric energy that described accumulated energy flywheel 15 stores simultaneously is less than the energy storage threshold value of setting, powered for described load 14 by described power supply grid 2
Known by foregoing description, photovoltaic micro networking 10 described in the application, grid-connected connection can be carried out by power supply grid, when described photovoltaic micro networking 10 power itself ability is sufficient, can power for load 14, and can power storage be carried out, when himself power supply capacity is not enough, can be powered for described load 14 by described power supply grid 2, achieve the maximization of electric power system capacity usage ratio when being incorporated into the power networks, the power output of described photovoltaic array 12 generating can be balanced by the discharge and recharge of described accumulated energy flywheel 15 and described storage battery 13, ensure the useful life of described storage battery 13 and the stable of described load 13 power.
When load factor change increasing or the described power supply grid 2 power supply trouble generation island effect of described micro-capacitance sensor submodule, described micro-capacitance sensor submodule 10 disconnects with described power supply grid 2 automatically.Now, for existing micro-capacitance sensor submodule, instantaneous larger fluctuation can be there is in current transformer power output, although the discharge and recharge reaction time of storage battery is longer, the power shortage that relatively high power compensates micro-capacitance sensor submodule can not be exported instantaneously, quality of power supply generation big ups and downs can be caused, easily cause the damage of electric power system and equipment.
In the application's embodiment, utilize the fast charging and discharging responding ability of described accumulated energy flywheel 15, relatively high power can be carried out regulate, DC side busbar voltage is regulated simultaneously, along with the carrying out regulated, DC side busbar voltage is progressively stabilized to standard value, progressively transfers to storage battery 13 will meet vacancy, compensate load vacancy finally by described storage battery 13, thus avoid the damage to storage battery 13 useful life.The control of micro-capacitance sensor submodule work when can be realized island effect by special EMS.
When there is island effect, described micro-capacitance sensor submodule 10 automatically switches to from network operation pattern, power for described load 14 by coordinating described storage battery 13, photovoltaic array 12 and accumulated energy flywheel 15, ensure the stable of power supply, the balance from available power during network operation and useless power can be realized.When from network operation, because described net electrical network submodule 10 can carry out the adjustment of power, therefore can progressively excise insignificant load, and can not change due to load factor the larger fluctuation causing system power, but can ensure the reliable power supply to important load.
As shown in Figure 1, in photovoltaic micro networking described in the application, described micro-capacitance sensor submodule also comprises generator 16.Described generator 16 is connected with described current transformer 11 and described load 14 respectively.Described generator is used at long-time island effect, and is load supplying in the not enough situation of photovoltaic array 12 power supply capacity, and proof load continues normal operation, avoids discharged or defective battery situation to occur simultaneously, ensures its useful life.
When from network operation, if photovoltaic array 12 generated output is less than setting power, when storage battery 13 electric energy is discharged into setting threshold simultaneously, be described load supplying by described generator 16, charge for described storage battery 13 and described accumulated energy flywheel 15 simultaneously, after described accumulated energy flywheel 15 and described storage battery 13 are full of electricity, described generator 16 quits work.If in generator 16 course of work, the power supply capacity of photovoltaic array 12 and/or described power supply grid 2 is recovered, then described generator 16 quits work.In use, photovoltaic array 12 utilization as much as possible be made, to reduce cost of electricity-generating.Described generator 16 preferably adopts gas electricity generator, to reduce the pollution to environment.
In described photovoltaic micro networking, the internal electric source of each micro-capacitance sensor submodule 10 comprises photovoltaic array 12, accumulated energy flywheel 15 and storage battery 13.The main power source of micro-capacitance sensor submodule 10 ac bus is photovoltaic array 12, and accumulated energy flywheel 15 and storage battery 13 are auxiliary power source.Micro-capacitance sensor submodule 10 ac bus and power supply grid 2 bus are with width with frequency homophase alternating current when being incorporated into the power networks, when from network operation, by current transformer 11 or generator 16 ME for maintenance benchmark, as being 380V, 50Hz.The AC of described current transformer is 380V ac bus, and its DC side is 750V DC bus.
Described photovoltaic micro networking also comprises: warning device, described warning device is reported to the police when described photovoltaic array generated output is less than setting power and/or described storage battery electric energy is discharged into setting threshold, so that alert opens described generator 16.Described warning device can be connected with described current transformer 11, is obtained generated output and the described storage battery electric energy release data of described photovoltaic array by described current transformer 11.
Described micro-capacitance sensor submodule 10 is provided with described accumulated energy flywheel 15, when described micro-capacitance sensor submodule 10 is incorporated into the power networks with the conducting of described power supply grid 2, described current transformer 11 and described accumulated energy flywheel 15 power operation with closed ring, described accumulated energy flywheel 15 is for realizing and the controlled PQ nodal function of described power supply grid 2 access point or peak regulating function, to regulate the power output of current transformer 11, reduce the fluctuation of its power output.Described micro-capacitance sensor submodule 10 with the open circuit of described power supply grid 2 from network operation time, described current transformer 11 does voltage close loop with described accumulated energy flywheel 15 and runs, described accumulated energy flywheel 15 is for realizing voltage support and the energy balance of described micro-capacitance sensor submodule 10, to regulate the power output of current transformer 11, reduce the fluctuation of its power output.Wherein, described PQ node is load bus, and the active-power P of this category node and reactive power Q are given.
Described current transformer 11 is energy storage inverter, comprises PCS (power conversion system, power conversion system or power inverter).When being incorporated into the power networks, PCS supports low/high voltage crossing and the two kinds of patterns that run without interruption, and this pattern is configured according to actual conditions by user.
For the photovoltaic micro networking that scale is less, the power supply reliability of load and power supply quality outbalance, in this case PCS is configured to uninterrupted operation pattern, once power supply grid 2 voltage magnitude or harmonic wave exceed critical field, PCS makes accumulated energy flywheel 15 and power supply grid 2 disconnect by controlling corresponding switch, micro-capacitance sensor submodule 10 and power supply grid 2 are departed from fast, within 15ms, voltage reference can be re-established by PCS, ensure that the uninterrupted of micro-capacitance sensor submodule 10 load and the high quality of power supply are run.Owing to possessing power supply and load in micro-capacitance sensor submodule 10, during PCS restore voltage benchmark, possess frequency soft start function, guarantee to impact the power supply of other micro-capacitance sensor submodules 10.
For larger photovoltaic micro networking, due to power supply grid 2 reliability relative to microgrid load power supply reliability more important, in this case too high or too low once power supply grid 2 short time voltage, PCS tolerates in certain curve ranges, and sends out reactive power support to accelerate power system restoration process.When being incorporated into the power networks, PCS both can coordinate EMS (EMS) to control the active reactive power of corresponding PQ Nodes, also can control the active reactive power of corresponding PQ Nodes according to EMS scheduling, can also come battery automatic charging according to EMS scheduling.Three kinds of operational modes can according to user's request Configuration Online.
During from network operation, PCS runs with voltage source, and it is the voltage support skeleton of whole photovoltaic micro networking.The all right adaptive various loadtype of PCS and power supply type simultaneously, built-in special algorithm reply three-phase imbalance load and nonlinear load, guarantee the quality of power supply of each message net module voltage in photovoltaic micro networking.If due to power supply grid 2 accidental power failure be switched to from network operation time, once power supply grid 2 restores electricity, PCS automatic seamless is switched to and is incorporated into the power networks, and according to before configuration mode run; If planned isolated island dispatch command cause from network operation, no matter power supply grid 2 there is electric power or not, PCS all can not be switched to and be incorporated into the power networks; If when power supply grid 2 has an electricity, as long as EMS assigns grid-connected instruction, PCS seamlessly switches to and is incorporated into the power networks.
During from network operation, PCS possesses power supply forecast function in cruising time.User can arrange the not enough alarm time of energy storage, and when such as energy storage can only support 5 minutes, PCS sends the not enough alarm of electricity to EMS.EMS can start jet dynamic control according to this signal.Owing to having certain impulse current to PCS when jet dynamic control is incorporated to microgrid, PCS possesses stronger power of resisting voltaic impingement and wave limiting function.When jet dynamic control runs as voltage support, if power supply grid 2 restores electricity, EMS can order PCS to adapter micro-capacitance sensor submodule 10 voltage support, and seamlessly switches to and be incorporated into the power networks.
Micro-capacitance sensor submodule 10 DC bus sections mounting batteries to store energy and accumulated energy flywheel energy storage.Batteries to store energy realizes short-time energy balance, and accumulated energy flywheel energy storage realizes very fast energy balance.PCS both can start from grid side, also can realize black starting-up from energy storage side.
With reference to the structural representation of a kind of EMS that figure 2, Fig. 2 provides for the embodiment of the present application, described EMS comprises: the network switch 21, server 22, multiple from control device 23 and display screen 24.Wherein, described from control device 23 be connected with above-mentioned micro-capacitance sensor submodule 10 by electrical quantity acquisition module 25.Described electrical quantity acquisition module 25 can be EDA9133A.The microgrid electrical quantity of the micro-capacitance sensor submodule 10 that the collection of described electrical quantity acquisition module 25 is attached thereto, and described microgrid electrical quantity is sent to the network switch 21 by corresponding from control device 23, and finally send to server 22.
Described server 22 comprises: data and the master server 221 that communicates, data and communication standby server 222 and computing management server 223.Described microgrid electrical quantity for obtaining described microgrid electrical quantity, and is supplied to described computing management server 223 with the standby server 222 that communicates by described data and communicate master server 221 and data.Described data and the master server 221 that communicates also obtain the electrical network parameter of above-mentioned power supply grid by main website 26 simultaneously.Described computing management server 223 realizes the above-mentioned automatic control from net mode of operation and grid-connected mode of operation according to described microgrid electrical quantity and described electrical network electrical quantity.Described display screen 24 may be used for showing the real-time microgrid electrical quantity of each micro-capacitance sensor submodule 10 and the real-time grid electrical quantity of power supply grid 20.
EMS is as system management layer, and primary responsibility provides the control of system cloud gray model to coordinate, and intervenes where necessary and change micro-capacitance sensor operational mode, and disaster prevention occurs.Consider management and monitoring ease for operation and visual needs, EMS is provided with display screen 24, adopts and graphically runs control inerface, forms the integrated control and supervisory configuration platforms such as figure, database, communication, control.
Known by foregoing description, in the photovoltaic micro networking that the embodiment of the present application provides, micro-capacitance sensor submodule adopts photovoltaic array, clean environment firendly, is applicable to the inconvenient area that powers.Adopt the gas electricity generator energy as a supplement, adjustable exciting current provides idle to electrical network if desired, improves grid power factor, makes operational system economical rationality, and it is free from environmental pollution that combustion gas simultaneously belongs to clean energy resource.Can be grid-connected or from network operation, seamless automatic switchover, power supply can not be interrupted, and system cloud gray model is more economical.By the competence management system of correspondence, important service data (comprising and net state, irradiance, realtime power, energy output etc.) is sent to Visualization Platform by network.Add accumulated energy flywheel in micro-capacitance sensor submodule, prolonging service life of battery, make system more reliable and stable.Thered is provided competence management system can be passed through automatically realize being incorporated into the power networks and from network operation.
The embodiment of the present application additionally provides the control method of photovoltaic micro networking, and for above-mentioned photovoltaic micro networking, this control method comprises: be incorporated into the power networks and control and control from network operation.
When described micro-capacitance sensor submodule is incorporated into the power networks, by coordinating described storage battery, photovoltaic array and power supply grid, it is described load supplying.
When being incorporated into the power networks, micro-capacitance sensor submodule is connected with power supply grid, and photovoltaic array generates electricity by way of merging two or more grid systems; Accumulated energy flywheel and current transformer are incorporated into the power networks with the controlled pattern of power, according to the Optimal Control Strategy of EMS, carry out charge-discharge energy management.
When described micro-capacitance sensor submodule is from network operation, by coordinating described storage battery, photovoltaic array, it is described load supplying.
During from network operation, batteries to store energy controller provides stable voltage and frequency to support for micro-capacitance sensor.Photovoltaic cells generates electricity by way of merging two or more grid systems, and other energy-storage units are incorporated into the power networks with the controlled pattern of power, according to the Optimal Control Strategy of EMS, carries out charge-discharge energy management.
At described micro-capacitance sensor submodule grid-connected or from network operation time, reduce by controlling described accumulated energy flywheel or eliminate the fluctuation of described current transformer power output.
From network operation/be incorporated into the power networks seamless switching: under network operation pattern, recover when power supply grid or receive grid-connected dispatch command, batteries to store energy controller adjustment self-operating state, afterwards closed solid-state switch synchronous with power supply grid, micro-capacitance sensor submodule proceeds to the pattern of being incorporated into the power networks, and guarantees the normal power supply of load in handoff procedure.
Be incorporated into the power networks/from network operation seamless switching: under the pattern that is incorporated into the power networks; when external electrical network abnormal electrical power supply or scheduled overhaul; batteries to store energy controller disconnects the solid-state switch that micro-capacitance sensor submodule is connected with power supply grid; and proceed to voltage/frequency control model, set up fast and stablize voltage and the frequency of micro-capacitance sensor.
When described micro-capacitance sensor submodule is incorporated into the power networks, control described current transformer and described accumulated energy flywheel power operation with closed ring, described accumulated energy flywheel is for realizing and the controlled PQ nodal function of described power supply grid access point or peak regulating function;
When described micro-capacitance sensor submodule is from network operation, described current transformer and described accumulated energy flywheel do voltage close loop and run, and described accumulated energy flywheel is for realizing voltage support and the energy balance of described micro-capacitance sensor submodule.
Described photovoltaic micro networking also comprises: generator; Described control method also comprises: at described micro-capacitance sensor submodule from network operation, and described photovoltaic array generated output is less than setting power and/or described storage battery electric energy when being discharged into setting threshold, and controlling described electrical power generators, is described load supplying.By described generator, can the normal operation of proof load in long-time island effect situation, place discharged or defective battery simultaneously, ensure its useful life.
Realize described control method by above-mentioned EMS, being incorporated into the power networks to above-mentioned micro-capacitance sensor submodule manages and manages from network operation.
When being incorporated into the power networks management to micro-capacitance sensor submodule, in micro-capacitance sensor submodule, photovoltaic energy generating is subject to the impact of the natural causes such as weather, power stage has feature that is intermittent and randomness, for the power fluctuation of regenerative resource, and in conjunction with power dispatching instruction, coordinate to use energy management strategies, comprehensive coordination Optimized Operation is carried out to unit such as energy storage, load, power supplys.
The energy management modes that is incorporated into the power networks comprises:
Firm power switch mode: the feeder line power of micro-capacitance sensor submodule and power supply grid junction is adjusted to constant or dispatches designated value by this pattern.When receiving with the instruction of power supply grid Power Exchange, the energy storage control system of storage battery and accumulated energy flywheel is in conjunction with the actual power consumption of photovoltaic power generation quantity and load, upgrade output power value, and by Command Resolution to each energy-storage units, the energetic interaction realizing micro-capacitance sensor submodule and power supply grid follows the change of power instruction.The advantage of this pattern is, relative power supply grid, and micro-capacitance sensor submodule can be equivalent to a schedulable load (or power supply).
Peak load shifting pattern: consider that solar day exists overlapping to a certain degree according to characteristic and the peak load characteristic of load, photovoltaic generation is set to peak load power supply, described energy storage control system according to the actual power consumption of load, and in conjunction with photovoltaic power generation quantity situation, upgrades output power value.When load boom period power demand exceed energy output larger time, described energy storage control system releases energy, and realizes peak clipping optimizing operation; When load valley phase power demand is less, the energy output of photovoltaic is higher, described energy storage control system stored energy, realizes filling out paddy optimizing operation.
Stabilize power fluctuation pattern: the main target of this operational mode stabilizes the fluctuation of renewable energy power generation amount, reduce photovoltaic power fluctuation and the adverse effect caused is run to micro-capacitance sensor submodule.Consider the fluctuation impact of photovoltaic, described energy storage control system is set as following power supply, regulate micro-capacitance sensor submodule power fluctuation.
Power directly controls pattern: support manual input power dispatch command, for the application demands such as the intervention of the described energy storage control system state of emergency, provisional manual dispatching provide online, friendly information interaction.
When carrying out micro-capacitance sensor submodule managing from network operation, the ac bus of micro-capacitance sensor submodule provides stable voltage and frequency by power supply grid, and the unit such as power supply and energy storage all runs with synchronizing mode.When power supply grid power failure or when breaking down, micro-capacitance sensor submodule switches to independent operation mode fast, the sharing fast of load, voltage and the function such as frequency adjustment, guarantee custom power quality is realized by energy-storage units, namely energy-storage units controller not only possesses basic control function of power, also should possess in respective capacity ratio share loads, suppress the characteristics such as interference.
Mainly comprise from network energy management: (1) batteries to store energy is operated in voltage/frequency control model, set up and maintain system voltage and frequency, when the cell power such as power supply, load fluctuates, autobalance micro-capacitance sensor submodule flow of power, during system underloading, the dump energy that photovoltaic produces in generating peak period is stored by described energy storage control system.(2) when photovoltaic generation power can not meet workload demand or the long-time fault of power supply grid, batteries to store energy capacity cannot support the supply of electric power of micro-capacitance sensor submodule for a long time, each energy-storage units according to self capacity ratio share loads, can provide part power back-off.
Described control method can control described micro-grid and be operated in from net pattern or grid-connect mode, and in described photovoltaic micro networking grid-connected or from network operation time, by controlling the fluctuation that described accumulated energy flywheel reduces or eliminates described current transformer power output, ensure that the stable of current transformer power output.
It should be noted that, the application's embodiment of the method and device embodiment describe and emphasize particularly on different fields, identical similarity and mutually supplementary notes.
To the above-mentioned explanation of the disclosed embodiments, professional and technical personnel in the field are realized or uses the utility model.To be apparent for those skilled in the art to the multiple amendment of these embodiments, General Principle as defined herein when not departing from spirit or scope of the present utility model, can realize in other embodiments.Therefore, the utility model can not be restricted to these embodiments shown in this article, but will meet the widest scope consistent with principle disclosed herein and features of novelty.
Claims (8)
1. a photovoltaic micro networking, comprises multiple micro-capacitance sensor submodule, it is characterized in that, described micro-capacitance sensor submodule comprises:
Current transformer;
The photovoltaic array be connected with described current transformer;
The storage battery be connected with described current transformer;
The load be connected with described current transformer;
The accumulated energy flywheel be connected with described current transformer;
Wherein, described accumulated energy flywheel is for reducing or eliminate the fluctuation of described current transformer power output; Described current transformer is connected with power supply grid by described accumulated energy flywheel.
2. photovoltaic micro networking according to claim 1, is characterized in that, described micro-capacitance sensor submodule also comprises: generator;
Wherein, described generator is connected with described current transformer and described load respectively.
3. photovoltaic micro networking according to claim 2, is characterized in that, described generator is gas electricity generator.
4. photovoltaic micro networking according to claim 2, it is characterized in that, when described micro-capacitance sensor submodule and described power supply grid conducting are incorporated into the power networks, described current transformer and described accumulated energy flywheel power operation with closed ring, described accumulated energy flywheel is for realizing and the controlled PQ nodal function of described power supply grid access point or peak regulating function.
5. photovoltaic micro networking according to claim 2, it is characterized in that, when described micro-capacitance sensor submodule and described power supply grid open circuit are from network operation, described current transformer and described accumulated energy flywheel do voltage close loop and run, and described accumulated energy flywheel is for realizing voltage support and the energy balance of described micro-capacitance sensor submodule.
6. photovoltaic micro networking according to claim 5, is characterized in that, also comprise: warning device, and described warning device is reported to the police when described photovoltaic array generated output is less than setting power and/or described storage battery electric energy is discharged into setting threshold.
7. photovoltaic micro networking according to claim 1, is characterized in that, the AC of described current transformer is 380V ac bus, and its DC side is 750V DC bus.
8. photovoltaic micro networking according to claim 1, is characterized in that, described current transformer is energy storage inverter.
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| CN201410637504.4A CN104333294A (en) | 2014-11-12 | 2014-11-12 | Photovoltaic micro-grid network organization and control method thereof |
| CN201420673336.XU CN204168208U (en) | 2014-11-12 | 2014-11-12 | A kind of photovoltaic micro networking |
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| CN201410637504.4A CN104333294A (en) | 2014-11-12 | 2014-11-12 | Photovoltaic micro-grid network organization and control method thereof |
| CN201420673336.XU CN204168208U (en) | 2014-11-12 | 2014-11-12 | A kind of photovoltaic micro networking |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN104333294A (en) * | 2014-11-12 | 2015-02-04 | 英利集团有限公司 | Photovoltaic micro-grid network organization and control method thereof |
| CN110535233A (en) * | 2019-09-24 | 2019-12-03 | 西安精石电气科技有限公司 | Base station power supply system and method |
| CN114421505A (en) * | 2022-03-01 | 2022-04-29 | 华驰动能(北京)科技有限公司 | Control method and device based on flywheel energy storage system and electronic equipment |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN109301853A (en) * | 2018-12-17 | 2019-02-01 | 国网江苏省电力公司经济技术研究院 | A kind of micro-capacitance sensor Multiple Time Scales energy management method for stabilizing power swing |
| CN109560549B (en) * | 2019-01-23 | 2020-12-29 | 清华大学 | Control method and system of backup flywheel energy storage UPS |
| CN113315153A (en) * | 2021-05-31 | 2021-08-27 | 广东电网有限责任公司广州供电局 | System, method and device for improving tolerance capability of auxiliary frequency converter |
| CN114362243A (en) * | 2021-12-10 | 2022-04-15 | 江苏镇安电力设备有限公司 | Battery charging control method for micro-grid system |
Family Cites Families (6)
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| CN102208815B (en) * | 2010-03-31 | 2013-09-18 | 比亚迪股份有限公司 | Household multi-energy system and control method thereof |
| CN102570868B (en) * | 2010-12-22 | 2015-04-01 | 通用电气公司 | System and method for power conversion |
| JP2013183577A (en) * | 2012-03-02 | 2013-09-12 | Kyocera Corp | Power control system, power control unit, and power control method |
| CN102709935B (en) * | 2012-05-02 | 2014-06-04 | 中国科学院广州能源研究所 | Distributed type photovoltaic micro electric network group net |
| CN104022528B (en) * | 2014-06-12 | 2016-08-17 | 国家电网公司 | A kind of microgrid system coordination control method based on multiple elements design energy storage |
| CN104333294A (en) * | 2014-11-12 | 2015-02-04 | 英利集团有限公司 | Photovoltaic micro-grid network organization and control method thereof |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104333294A (en) * | 2014-11-12 | 2015-02-04 | 英利集团有限公司 | Photovoltaic micro-grid network organization and control method thereof |
| CN110535233A (en) * | 2019-09-24 | 2019-12-03 | 西安精石电气科技有限公司 | Base station power supply system and method |
| CN114421505A (en) * | 2022-03-01 | 2022-04-29 | 华驰动能(北京)科技有限公司 | Control method and device based on flywheel energy storage system and electronic equipment |
| CN114421505B (en) * | 2022-03-01 | 2022-10-11 | 华驰动能(北京)科技有限公司 | Control method and device based on flywheel energy storage system and electronic equipment |
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