CN202374195U - Photovoltaic off-connected grid and energy storage mixing power supply system - Google Patents
Photovoltaic off-connected grid and energy storage mixing power supply system Download PDFInfo
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- CN202374195U CN202374195U CN2011204823279U CN201120482327U CN202374195U CN 202374195 U CN202374195 U CN 202374195U CN 2011204823279 U CN2011204823279 U CN 2011204823279U CN 201120482327 U CN201120482327 U CN 201120482327U CN 202374195 U CN202374195 U CN 202374195U
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- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E10/00—Energy generation through renewable energy sources
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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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- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
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Abstract
The utility model provides a photovoltaic off-connected grid and energy storage mixing power supply system, which comprises a commercial network, a photovoltaic power supply source, a photovoltaic dual-mode inverter, an energy storage battery, an energy storage two-way dual-mode inverter and a user load, wherein the commercial network is used for supplying electricity to the user load, charging the energy storage battery and bearing the electric energy of a photovoltaic feed network, the photovoltaic power supply source and the photovoltaic dual-mode inverter are used for supplying electricity to the user load, realizing the photovoltaic connected grid feeding and charging the energy storage battery after being connected, and the energy storage battery and the energy storage two-way dual-mode inverter are used for supplying electricity to the user load and realizing the energy storage connected grid feeding after being connected. The mixed power supply system favorably realizes the advantage and disadvantage complementation of the photovoltaic off grid and connected grid power supply.
Description
Technical field
The utility model relates to the photovoltaic power supply field, and particularly a kind of low profile photovoltaic of family expenses is from being incorporated into the power networks and the energy storage mixed power supply system.
Background technology
At present mainly contain two kinds of forms towards the photovoltaic power supply product of home unit on the market: (one) power supply of being incorporated into the power networks: it is electric jointly that the electric energy that the photovoltaic power supply source produces merges with city's net through combining inverter; (2) from the net power supply: it is electric that the electric energy that the photovoltaic power supply source produces and city's net are isolated independent.No matter be incorporated into the power networks or, all need dispose the energy storage of a constant volume, guaranteeing power supply quality, and guarantee to make full use of the electric energy that photovoltaic produces from net.
The characteristics of supplying power that are incorporated into the power networks are that photovoltaic electric energy and city's net insert same bus, are electric simultaneously.If the photovoltaic electric energy surpasses bearing power, more than the photovoltaic electric energy oppositely present net; If the photovoltaic electric energy can not satisfy bearing power, city's net and stream replenish.Therefore the advantage of powering mode of being incorporated into the power networks is that the constraints of system design is few, and flexibility is big.But its major defect is: under grid-connected powering mode; Combining inverter is based on definite its output voltage amplitude of urban network electricity pressure and phase place; It is the power supply state that photovoltaic power supply is limited by city's net; In case city's net power down, combining inverter has just lost basis of reference, and therefore grid-connected power supply can not move under the isolated island pattern.And when city's net power down, require combining inverter to have real-time detectability, and quit work immediately, be fed to city's net, promptly require to have isolated island effect prevention with the electric current of avoiding the photovoltaic power supply source to produce.
Advantage from the net power supply is that leaving the net inverter can independently provide the output voltage benchmark, is not limited by the power supply state of city's net, can under the isolated island pattern, move.But its major defect is: the coupling of each link of system design requires high, the very flexible of reply load variations.
Therefore, need a kind ofly both can under the isolated island pattern, move the photovoltaic mixed power supply system that can be incorporated into the power networks again.
The utility model content
The purpose of the utility model is intended to solve at least one of technical problem that exists in the prior art, particularly proposes a kind ofly both can under the isolated island pattern, move, and the photovoltaic that can be incorporated into the power networks again is from being incorporated into the power networks and the energy storage mixed power supply system.
For realizing above-mentioned purpose, the utility model provides a kind of photovoltaic from being incorporated into the power networks and the energy storage mixed power supply system, comprising: city's net, photovoltaic power supply source, photovoltaic bimodulus inverter, energy-storage battery, the two-way bimodulus inverter of energy storage and user load.Wherein: said city net is used for said user load power supply, to said energy-storage battery charging, and the feedback net electric energy that carries said photovoltaic power supply source; Said photovoltaic power supply source is with after said photovoltaic bimodulus inverter is connected; Be used for said user load power supply, to said energy-storage battery charging, and to said city net feed; Wherein, said photovoltaic bimodulus inverter is used to follow the said urban network electricity pressure or the output voltage of adjusting certainly; Said energy-storage battery is with after the two-way bimodulus inverter of said energy storage is connected; Be used to store electric energy from photovoltaic power supply source or civil power; And to said user load power supply; Wherein, the two-way bimodulus inverter of said energy storage inverter output voltage is followed said urban network electricity and is pressed the output voltage of perhaps adjusting certainly that said user load is supplied power, and the two-way bimodulus inverter of said energy storage works in the rectification direction to control the charging of said energy-storage battery.
In the utility model embodiment; Said photovoltaic is from being incorporated into the power networks and the energy storage mixed power supply system also comprises absorbing load; Said absorbing load is connected with said photovoltaic power supply source, is used to consume said photovoltaic power supply source to said user load power supply and to remaining electric energy after the said energy-storage battery charging.
In the utility model embodiment, said photovoltaic is from being incorporated into the power networks and the energy storage mixed power supply system can carry at grid-connected and band, and grid-connected, band carries, charging and feedback net; Grid-connected, band carries, presents net and charging, and energy-storage battery is incorporated into the power networks and is with and carries, and city's guipure carries; City's guipure carries and charges; Photovoltaic off-grid, energy-storage battery are incorporated into the power networks and are with and carry, and photovoltaic off-grid, band carry, charge and absorb, and energy-storage battery carries under nine kinds of patterns from guipure works.Wherein, band described in the utility model embodiment carries and to be meant and to be electric.
Carry pattern for grid-connected and band; When said user load power less than the power in said photovoltaic power supply source and said energy-storage battery when judgement need not to charge; Said photovoltaic power supply source independently is said user load power supply; Dump energy is fed to said city net simultaneously, with the electric energy that guarantees that said user load utilizes photo-voltaic power supply to produce to greatest extent, that is consumes the electric energy that net in said city as few as possible.Wherein said photovoltaic bimodulus inverter output voltage is followed said urban network electricity and is pressed, and the two-way bimodulus inverter of said energy storage is in cut-off state.
For grid-connected, band carries, charging and feedback net pattern; When said user load power needs preferential charging less than the power in said photovoltaic power supply source and said energy-storage battery through judging; Said photovoltaic power supply source independently is said user load power supply and is said energy-storage battery charging; Dump energy is fed to said city net then, with the electric energy that guarantees that said user load utilizes photo-voltaic power supply to produce to greatest extent, that is consumes the electric energy that net in said city as few as possible.Wherein said photovoltaic bimodulus inverter output voltage is followed said urban network electricity and is pressed, and the two-way bimodulus inverter of said energy storage is in rectification direction charged state.
For grid-connected, band carries, feedback net and charge mode; When said user load power needs preferential feed less than the power in said photovoltaic power supply source and said city net through judging; Said photovoltaic power supply source independently is said user load power supply and to said city net feed; Dump energy is said energy-storage battery charging then, and wherein said photovoltaic bimodulus inverter is followed said urban network electricity and pressed output voltage, and the two-way bimodulus inverter of said energy storage is in the rectification charging state.
Be incorporated into the power networks and be with the pattern of carrying for energy-storage battery, when said photovoltaic power supply source by power supply, said city net has; And when said energy-storage battery allows discharge through judging; Said energy-storage battery independently is said user load power supply, simultaneously the part electric energy of its storage is netted feed to said city, and the two-way bimodulus inverter of wherein said energy storage is in the inversion discharge condition; Output voltage is followed urban network electricity and is pressed, and said photovoltaic bimodulus inverter is in cut-off state.
Carry pattern for city's guipure; End power supply when said photovoltaic power supply source, city's net has electricity, and said energy-storage battery is not when judgement allows to discharge; Said city net is independent to be said user load power supply, and wherein said photovoltaic bimodulus inverter and the two-way inverter of energy storage bimodulus are in cut-off state.
Carry and charge mode for city's guipure; When power supply is ended in said photovoltaic power supply source; City's net has electricity, and said energy-storage battery is when judgement needs charging, and said city net is independent be said user load power supply and charge for said energy-storage battery; The two-way bimodulus inverter of wherein said energy storage works in rectification direction charged state, and said photovoltaic bimodulus inverter is in cut-off state.
Be incorporated into the power networks and be with the pattern of carrying for photovoltaic off-grid, energy-storage battery; When said photovoltaic power supply source can supply power; The net outage of said city, said user load power are greater than said photovoltaic power supply source power, and said energy-storage battery is when judging the permission discharge; It is said user load power supply that said photovoltaic power supply source and energy-storage battery are incorporated into the power networks common; Wherein said photovoltaic bimodulus inverter is from adjusting ac output voltage, and the two-way bimodulus inverter of said energy storage is in inversion direction discharge condition, and output voltage is followed the output voltage of said photovoltaic bimodulus inverter.
For photovoltaic off-grid, band carry, charging and absorption mode; When said photovoltaic power supply source can supply power, the net outage of said city, said user load power is less than said photovoltaic power supply source power; And when said energy-storage battery needs charging through judgement; Said photovoltaic power supply source is separately said user load power supply, and dump energy is preferably said energy-storage battery charging, also has dump energy to be absorbed by said absorbing load then; Perhaps the power output through regulating said photovoltaic power supply source to be reaching the coupling of terminal power, and the power output in promptly said photovoltaic power supply source is that the dump energy after the said user load power supply satisfies just and is said energy-storage battery charging.Wherein said photovoltaic bimodulus inverter is from adjusting ac output voltage, and the two-way inverter of said energy storage bimodulus is in rectification direction charged state.
Carry pattern for energy-storage battery from guipure; End power supply when said photovoltaic power supply source, outage is netted in said city, when said energy-storage battery can discharge through judging; By said energy-storage battery independently is said user load power supply; Wherein said photovoltaic bimodulus inverter is in cut-off state, and the two-way inverter of said energy storage bimodulus is in inversion direction discharge condition, the output voltage of adjusting certainly.
In the utility model embodiment; Said photovoltaic is from being incorporated into the power networks and the energy storage mixed power supply system also comprises central controller; Above-mentioned each building block of said central controller and said electric power system is set up communication; Gather the status signal of said each building block in real time; And judge and control the work at present pattern of said electric power system according to real-time status information, promptly through the current state of said each building block of electric power system is judged, thereby confirm and control said electric power system to run on appropriate mode of operation.
The utility model provides a kind of photovoltaic of suitable family expenses from being incorporated into the power networks and the energy storage mixed power supply system; Has the urban network electricity of tracking pressure energy power when being incorporated into the power networks through setting; When net, have photovoltaic bimodulus inverter and the two-way bimodulus inverter of energy storage from the output voltage capability of adjusting; Photovoltaic off-grid is incorporated in the same electric power system with being incorporated into the power networks to supply power,, helps the optimal design of photovoltaic power supply system to realize the excellent contrary gesture complementation of the photovoltaic off-grid and the power supply of being incorporated into the power networks.
Aspect that the utility model is additional and advantage part in the following description provide, and part will become obviously from the following description, or recognize through the practice of the utility model.
Description of drawings
Above-mentioned and/or additional aspect of the utility model and advantage are from obviously with easily understanding becoming the description of embodiment below in conjunction with accompanying drawing, wherein:
The photovoltaic that Fig. 1 provides for the utility model embodiment is from being incorporated into the power networks and the configuration diagram of energy storage mixed power supply system;
Fig. 2 is the electrical schematic diagram of the photovoltaic bimodulus inverter of the utility model embodiment;
Fig. 3 is the electrical schematic diagram of the two-way bimodulus inverter of the energy storage of the utility model embodiment;
Fig. 4 is the system schematic that the grid-connected of the utility model embodiment and band carry pattern;
Fig. 5 is the system schematic that grid-connected, the band of the utility model embodiment carried, charges and presented the net pattern;
Fig. 6 is that grid-connected, the band of the utility model embodiment carries, the system schematic of feedback net and charge mode;
Fig. 7 is incorporated into the power networks for the energy-storage battery of the utility model embodiment and with the system schematic of the pattern of carrying;
Fig. 8 carries the system schematic of pattern for city's guipure of the utility model embodiment;
Fig. 9 carries for city's guipure of the utility model embodiment and the system schematic of charge mode;
Figure 10 is incorporated into the power networks for photovoltaic off-grid, the energy-storage battery of the utility model embodiment and with the system schematic of the pattern of carrying;
Figure 11 is that photovoltaic off-grid, the band of the utility model embodiment carries, the system schematic of charging and absorption mode;
Figure 12 is the system schematic of the energy-storage battery of the utility model embodiment from the net powering mode.
Embodiment
Describe the embodiment of the utility model below in detail, the example of said embodiment is shown in the drawings, and wherein identical from start to finish or similar label is represented identical or similar elements or the element with identical or similar functions.Be exemplary through the embodiment that is described with reference to the drawings below, only be used to explain the utility model, and can not be interpreted as restriction the utility model.
In the description of this specification, the description of reference term " embodiment ", " some embodiment ", " example ", " concrete example " or " some examples " etc. means the concrete characteristic, structure, material or the characteristics that combine this embodiment or example to describe and is contained among at least one embodiment or example of the utility model.In this manual, the schematic statement to above-mentioned term not necessarily refers to identical embodiment or example.And concrete characteristic, structure, material or the characteristics of description can combine with suitable manner in any one or more embodiment or example.
The photovoltaic that provides for the utility model embodiment shown in Figure 1 is from being incorporated into the power networks and the configuration diagram of energy storage mixed power supply system.As shown in Figure 1, the photovoltaic of the utility model embodiment is from being incorporated into the power networks and the energy storage mixed power supply system comprises: the two-way bimodulus inverter of city's net 100, photovoltaic power supply source 200, photovoltaic bimodulus inverter 300, energy-storage battery 400, energy storage 500, user load 600 and absorbing load 700.This mixed power supply system comprises three power supply branch roads: civil power branch road, photovoltaic branch road and energy storage branch road; And two load branch: user load branch road; And absorbing load branch road (optional), all five branch roads are communicated with AC (interchange) bus respectively through electric switch (for example electric switch K1, K2, K3, K4 and K5).
Wherein, the civil power branch road comprises city's net 100, and city's net 100 is used for discharging and recharging to user load 600 power supplies and to energy-storage battery 400.In the utility model embodiment, the civil power branch road is also necessary to comprise that the ammeter 800 (for example the four-quadrant ammeter 800) of connecting with city's net 100 shows in order to real-time detection and power supply is netted in the record city, feed condition and data are incorporated into the power networks; Comprise between civil power branch road and the AC bus K switch 1 be used to control city's net 100 and AC bus from being incorporated into the power networks.
The photovoltaic branch road comprises photovoltaic power supply source 200 and photovoltaic bimodulus inverter 300.Photovoltaic power supply source 200 can be any solar powered source, for example photovoltaic battery array.Photovoltaic power supply source 200 is connected to the AC bus again with after photovoltaic bimodulus inverter 300 is connected, and can be via load branch, energy storage branch road and civil power branch road, to user load 600 power supplies, net 100 feeds to energy-storage battery 400 chargings and to the city.Wherein, photovoltaic bimodulus inverter 300 is used to follow the voltage of city's net 100 or the output AC voltage of adjusting certainly.In the utility model embodiment, photovoltaic power supply source 200 is with after photovoltaic bimodulus inverter 300 is connected, and the ammeter 900 of can also connecting (for example the PV ammeter 900) shows with real-time detection and the power supply state and the data of record photovoltaic power supply source.
The energy storage branch road comprises energy-storage battery 400 and the two-way bimodulus inverter 500 of energy storage.Energy-storage battery 400 is with after the two-way bimodulus inverter 500 of energy storage is connected; Being connected to the AC bus again, can be its charging by city's net 100 and/or photovoltaic power supply source 200 via civil power branch road, photovoltaic branch road and load branch; Net 100 feeds to the city, and be user load 600 power supplies.Wherein, The two-way bimodulus inverter 500 of energy storage is used to follow the voltage of city's net 100 or follows perhaps supplying power to user load 600 from the net output AC voltage from adjusting from netting ac output voltage of photovoltaic bimodulus inversion 300; The two-way bimodulus inverter 500 of energy storage this moment is in direct current input AC output state, promptly is operated in the inversion direction; The two-way bimodulus inverter 500 of energy storage also has the input of interchange direct current output state, i.e. rectification direction, and the direct current output under its rectification state is used to control the charging of energy-storage battery 400.Comprise between energy storage branch road and the AC bus K switch 4 be used to control energy-storage battery 400 from being incorporated into the power networks.
User load branch road and absorbing load branch road comprise user load 600 and absorbing load 700 respectively.User load 600 is service objects of whole electric power system, the power supply branch road of system: civil power branch road, photovoltaic branch road and energy storage branch road all design for the power demands that satisfies user load 600.Absorbing load 700 is the devices that when photovoltaic off-grid power supply and user load 600 and energy-storage battery 400 all no longer can receive the electric energy that photovoltaic power supply source 200 produced, absorb dump energy.In the utility model embodiment, user load 600 is connected with the AC bus respectively with absorbing load 700, and the break-make between user load 600 and absorbing load 700 and the AC bus is controlled by electric switch K3 and K5 respectively.Two kinds of load control circuits separately that load all attaches to increase the degree of freedom of system works, help the system optimization design more.
The photovoltaic of the utility model embodiment is from being incorporated into the power networks and the energy storage mixed power supply system also comprises central controller (Fig. 1 is not shown); Above-mentioned each building block of this central controller and this electric power system is set up communication; Gather the status signal of said each building block in real time, and judge and control the work at present pattern of this electric power system according to real-time status information.That is to say; Central controller is through gathering the current state information of the city of electric power system net 100, photovoltaic power supply source 200, photovoltaic bimodulus inverter 300, energy-storage battery 400, energy storage two way convertor 500, user load 600 each parts; And then make judgement and send instruction to corresponding building block, work in appropriate mode of operation thereby control said electric power system.What need explanation is that so-called among each embodiment of the utility model " through judging " or similar statements such as " judging through system " are if no specified otherwise is all represented to make judgement by central controller.
Realize both can under the net pattern, moving of the utility model; The photovoltaic that can be incorporated into the power networks again is from being incorporated into the power networks and the energy storage mixed power supply system; The control circuit of two kinds of inverters in the requirement system (photovoltaic bimodulus inverter 300 with the two-way bimodulus inverter 500 of energy storage) can be operated in and be incorporated into the power networks and leave and net under two kinds of control models; Have when being incorporated into the power networks, to have and follow the tracks of that urban network electricity is pressed or AC bus benchmark alternating voltage (works in from the net pattern at native system photovoltaic bimodulus inverter 300; It can be used as reference voltage from ac output voltage of adjusting) ability, and when net, have from the ability of adjusting output voltage.Shown in Figure 2 is the electrical schematic diagram of the photovoltaic bimodulus inverter 300 of the utility model embodiment, and photovoltaic bimodulus inverter 300 comprises single-phase/three-phase inverter (main loop of power circuit) 301, sample circuit 302, and control counting circuit 303.The inverter power circuit topology can be divided into single-phase and two types of three-phases according to exchanging output, and present embodiment is selected wherein any one type for use; Photovoltaic DC-to-AC converter can be divided into from net according to control model and be incorporated into the power networks two kinds; The described bimodulus inverter of present embodiment just is meant that the control circuit of photovoltaic DC-to-AC converter can realize from the net and the two kinds of control models that are incorporated into the power networks, and is integrated by control counting circuit 303 and realizes two kinds of control models and can switch mutually according to operation mode; Sample circuit 302 is used to gather output and the input voltage and the electric current of photovoltaic bimodulus inverter 300, and the circuit of correlation behavior parameter.Shown in Figure 3 is the electrical schematic diagram of the two-way bimodulus inverter 500 of energy storage of the utility model embodiment, comprises the two-way inverter of single-phase/three-phase (main loop of power circuit) 501, sample circuit 502, and control counting circuit 503.Two-way inverter means: main loop of power circuit both can be exported (inversion direction) by the direct current input AC, can also exchange input direct current output (rectification direction); Control counting circuit 503 also requires to realize single-phase or three phase rectifier control except realizing from the net and the bimodulus that is incorporated into the power networks are controlled; Sample circuit is used to gather the alternating current-direct current input and output voltage and the electric current of two-way inverter system, and the correlation behavior parameter.
The photovoltaic of describing the utility model embodiment below in conjunction with accompanying drawing 4-12 is from being incorporated into the power networks and the various mode of operations of energy storage mixed power supply system.
Shown in Figure 4 is grid-connected and the system schematic of band year pattern.With reference to figure 1, K1, K2 and K3 are closed, and K4 and K5 break off.With reference to figure 4, photovoltaic power supply source 200, city's net 100 and user load 600 are communicated with the AC bus respectively, and energy storage branch road and absorbing load 700 are in off-state with it.This moment, the power of user load 600 need not charging less than 200 power that can provide in photovoltaic power supply source and energy-storage battery 400 through judging; By photovoltaic power supply source 200 independently is user load 600 power supplies; The dump energy in photovoltaic power supply source 200 is fed to city's net 100 simultaneously; Utilize the electric energy of photo-voltaic power supply generation to greatest extent with assurance user load 600, that is consume the electric energy of city's net 100 as few as possible.Wherein photovoltaic bimodulus inverter 300 output AC voltages are followed the voltage of city's net 100, and the two-way inverter 500 of energy storage bimodulus this moment is in cut-off state.Be pointed out that in each embodiment of the utility model, judging that energy-storage battery 400 is in needs charging, discharge or preferential charged state, can be judged by system's central controller, and realized by the control counting circuit 503 of the two-way inverter 500 of energy storage bimodulus.
Shown in Figure 5 be grid-connected, band carries, the system schematic of charging and feedback net pattern.With reference to figure 1, K1, K2, K3 and K4 are closed, and K5 breaks off.With reference to figure 5, photovoltaic power supply source 200, city's net 100, user load 600 and energy-storage battery 400 are communicated with the AC bus respectively, and absorbing load 700 is in off-state with it.The power of user load 600 is less than 200 power that can provide in photovoltaic power supply source at this moment; And when energy-storage battery 400 needs preferential charging through judging; Photovoltaic power supply source 200 independently is user load 600 power supplies, and electric weight more than needed is preferably energy-storage battery 400 chargings, if also residue has electric weight to net 100 feeds to the city.Can guarantee the electric energy that said user load utilizes photo-voltaic power supply to produce to greatest extent like this, that is consume the electric energy of said city net as few as possible.At this moment, the ac output voltage of photovoltaic bimodulus inverter 300 is followed the tracks of the voltage of city's net 100, and it is energy-storage battery 400 chargings that the two-way bimodulus inverter 500 of energy storage works in the rectification direction.Be, under this mode of operation, K1 must remain closed with noting, and promptly the civil power branch road is in dormant state, for the access of high power load provides stand-by electric energy.
Shown in Figure 6 is system schematic grid-connected, that band carries, presents net and charge mode.With reference to figure 1, K1, K2, K3 and K4 are closed, and K5 breaks off.With reference to figure 6, photovoltaic power supply source 200, city's net 100, user load 600 and energy-storage battery 400 are communicated with the AC bus respectively, and absorbing load 700 is in off-state with it.The power of user load 600 is less than 200 power that can provide in photovoltaic power supply source at this moment; And central controller is judged when proper and is netted feed to the city; And energy-storage battery 400 can charge through judging; Photovoltaic power supply source 200 is separately user load 600 power supplies, and electric weight more than needed is preferentially netted 100 feeds to the city, if also residue has electric weight then to be energy-storage battery 400 chargings.At this moment, photovoltaic bimodulus inverter 300 ac output voltages are followed the tracks of the voltage of city's net 100, and the two-way bimodulus inverter 500 of energy storage is in holding state, and working method is that rectification direction and preparation are energy-storage battery 400 chargings.
Shown in Figure 7ly be incorporated into the power networks and with the system schematic of carrying pattern for energy-storage battery.With reference to figure 1, K1, K3 and K4 are closed, and K2 and K5 break off.With reference to figure 7, city's net 100, user load 600 and energy-storage battery 400 are communicated with the AC bus, and photovoltaic branch road and absorbing load 700 are in off-state with it.This moment, photovoltaic power supply source 200 was by power supply; And system judges when proper and nets feed to the city; And it is user load power supply and to city's net feed that energy-storage battery has enough electric weight, is user load 600 power supplies and the part electric energy of its storage netted 100 feeds to the city by 400 discharges of the two-way bimodulus inverter 500 control energy-storage batteries of energy storage.At this moment, photovoltaic bimodulus inverter 300 is in cut-off state, and the two-way bimodulus inverter 500 of energy storage works in inversion direction discharge condition, and its ac output voltage is followed urban network electricity and pressed.
System schematic of carrying pattern for city's guipure shown in Figure 8.With reference to figure 1, K1 and K3 are closed, and K2, K4 and K5 break off.With reference to figure 8, city's net 100, user load 600 is communicated with the AC bus, and photovoltaic branch road, energy storage branch road and absorbing load 700 are in off-state with it.This moment, photovoltaic power supply source 200 was by power supply, and energy-storage battery 400 do not allow discharge through judging, independently was that user load 600 is supplied power by city's net 100.At this moment, photovoltaic bimodulus inverter 300 all is in cut-off state with the two-way bimodulus inverter 500 of energy storage.
Shown in Figure 9ly carry and the system schematic of charge mode for city's guipure.With reference to figure 1, K1, K3 and K4 are closed, and K2 and K5 break off.With reference to figure 9, city's net 100, user load 600 and energy-storage battery 400 are communicated with the AC bus, and photovoltaic branch road and absorbing load 700 are in off-state with it.This moment, photovoltaic power supply source 200 was by power supply, and energy-storage battery 400 needs charging through judgement, independently was that user load 600 is supplied power by city's net 100.At this moment, the two-way bimodulus inverter 500 of energy storage works in rectification direction charged state, and photovoltaic bimodulus inverter 300 is in cut-off state.
Shown in Figure 10 for photovoltaic off-grid, energy-storage battery is incorporated into the power networks and with the system schematic of carrying pattern.With reference to figure 1, K2, K3 and K4 are closed, and K1 and K5 break off.With reference to Figure 10, photovoltaic power supply source 200, user load 600, energy-storage battery 400 are communicated with the AC bus, and civil power branch road and absorbing load 700 are in off-state with it.City's net 100 outages this moment, user load 600 power are greater than photovoltaic power supply source 200 power, and energy-storage battery 400 allows discharge through judging; By photovoltaic power supply source 200 and energy-storage battery 400 is user load 600 power supplies jointly.At this moment, photovoltaic bimodulus inverter 300 works in from net state from the output AC voltage of adjusting, and the two-way bimodulus inverter 500 of energy storage works in parallel network reverse direction discharge mode, and its ac output voltage is followed the output voltage of photovoltaic bimodulus inverter 300.
Shown in Figure 11ly be that photovoltaic off-grid, band carry, the system schematic of charging and absorption mode.With reference to figure 1, K2, K3, K4 and K5 are closed, and K1 breaks off.With reference to Figure 11, photovoltaic power supply source 200, user load 600, energy-storage battery 500 are communicated with the AC bus, and the civil power branch road is in off-state with it.City's net 100 outages this moment, user load 600 power are less than photovoltaic power supply source 200 power, and energy-storage battery 400 can charge through judging; By photovoltaic power supply source 200 independently is user load 600 power supplies, and electric weight more than needed is preferably energy-storage battery 400 chargings, if also residue has electric weight to be absorbed by absorbing load 700.In optional embodiment of the utility model; Can not comprise absorbing load 700 in the electric power system; Then can be through the power output in central controller controls photovoltaic power supply source 200; Make the terminal power of its matching system, promptly avoid photovoltaic power supply source 200 for user load 600 power supplies and be the generation of energy-storage battery 400 charging dump powers.At this moment, photovoltaic bimodulus inverter 300 works in from net state from the output AC voltage of adjusting, and the two-way bimodulus inverter 500 of energy storage is in rectification direction charged state.
Shown in Figure 12 is that energy-storage battery is from the system schematic of netting powering mode.With reference to figure 1, K3 and K4 are closed, and K1, K2 and K5 break off.With reference to Figure 12, user load 600 is communicated with the AC bus with energy-storage battery 400, and civil power branch road, photovoltaic branch road and absorbing load 700 are in off-state with it.City's net 100 outages this moment, photovoltaic power supply source 200 is by power supply, and energy-storage battery 400 can discharge through judging; By energy-storage battery 400 independently is user load 600 power supplies.At this moment, photovoltaic bimodulus inverter 300 is in cut-off state, and the two-way bimodulus inverter 500 of energy storage works in from net inversion direction, the ac output voltage and control the discharge of energy-storage battery 400 adjusted certainly.
The utility model provides a kind of photovoltaic of suitable family expenses from being incorporated into the power networks and the energy storage mixed power supply system; Has the urban network electricity of tracking pressure energy power when being incorporated into the power networks through setting; When net, have photovoltaic bimodulus inverter and the two-way bimodulus inverter of energy storage from the output voltage capability of adjusting; The photovoltaic off-grid power supply and the power supply of being incorporated into the power networks are incorporated in the same electric power system, complementary with the excellent contrary gesture that realizes the photovoltaic off-grid and the power supply of being incorporated into the power networks, help the optimized design of the system that realizes.
Although illustrated and described the embodiment of the utility model; For those of ordinary skill in the art; Be appreciated that under the situation of principle that does not break away from the utility model and spirit and can carry out multiple variation, modification, replacement and modification that the scope of the utility model is accompanying claims and be equal to and limit to these embodiment.
Claims (13)
1. a photovoltaic is characterized in that from being incorporated into the power networks and the energy storage mixed power supply system, comprising: city's net, photovoltaic power supply source, photovoltaic bimodulus inverter, energy-storage battery, the two-way bimodulus inverter of energy storage and user load, wherein:
Said city net is used for said user load power supply, to said energy-storage battery charging, and the feedback net electric energy that carries said photovoltaic power supply source;
Said photovoltaic power supply source is with after said photovoltaic bimodulus inverter is connected; Be used for said user load power supply, to said energy-storage battery charging, and to said city net feed; Wherein, said photovoltaic bimodulus inverter is used to follow the said urban network electricity pressure or the output voltage of adjusting certainly;
Said energy-storage battery is with after the two-way bimodulus inverter of said energy storage is connected; Be used for said user load power supply; Wherein, The two-way bimodulus inverter of said energy storage is followed the output voltage of said urban network electricity pressure or said photovoltaic bimodulus inverter or from the output voltage of adjusting said user load is supplied power, and the two-way bimodulus inverter of said energy storage works in the rectification direction to control the charging of said energy-storage battery.
2. photovoltaic as claimed in claim 1 is from being incorporated into the power networks and the energy storage mixed power supply system; It is characterized in that; Also comprise absorbing load; Said absorbing load is connected with said photovoltaic power supply source, is used to consume said photovoltaic power supply source to said user load power supply and to remaining electric energy after the said energy-storage battery charging.
3. photovoltaic as claimed in claim 2 is characterized in that from being incorporated into the power networks and the energy storage mixed power supply system, and said photovoltaic is from being incorporated into the power networks and the energy storage mixed power supply system carries at grid-connected and band; Grid-connected, band carries, charging and feedback net, and grid-connected, band carries, feedback net and charging, and energy-storage battery is incorporated into the power networks and is with and carries; City's guipure carries, and city's guipure carries and charges, and photovoltaic off-grid, energy-storage battery are incorporated into the power networks and are with and carry; Photovoltaic off-grid, band carry, charge and absorb, and energy-storage battery carries under nine kinds of patterns from guipure works.
4. photovoltaic as claimed in claim 3 is characterized in that from being incorporated into the power networks and the energy storage mixed power supply system, and the said grid-connected and band pattern of carrying comprises:
When said user load power less than the power in said photovoltaic power supply source and said energy-storage battery when judgement need not to charge; Said photovoltaic power supply source independently is said user load power supply; Dump energy is fed to said city net simultaneously; Wherein said photovoltaic bimodulus inverter output voltage is followed said urban network electricity and is pressed, and the two-way inverter of said energy storage bimodulus is in cut-off state.
5. photovoltaic as claimed in claim 3 is characterized in that from being incorporated into the power networks and the energy storage mixed power supply system, said grid-connected, band carries, charging and feedback net pattern comprise:
When said user load power needs preferential charging less than the power in said photovoltaic power supply source and said energy-storage battery through judging; Said photovoltaic power supply source independently is said user load power supply and is said energy-storage battery charging; Dump energy is fed to said city net then; Wherein said photovoltaic bimodulus inverter output voltage is followed said urban network electricity and is pressed, and the two-way inverter of said energy storage bimodulus is in the rectification charging state.
6. photovoltaic as claimed in claim 3 is characterized in that from being incorporated into the power networks and the energy storage mixed power supply system, said grid-connected, band carries and feedback net and charge mode comprise:
When said user load power needs preferential feed less than the power in said photovoltaic power supply source and said city net through judging; Said photovoltaic power supply source independently is said user load power supply and to said city net feed; Dump energy is said energy-storage battery charging then; Wherein said photovoltaic bimodulus inverter output voltage is followed said urban network electricity and is pressed, and the two-way inverter of said energy storage bimodulus is in the rectification charging state.
7. photovoltaic as claimed in claim 3 is characterized in that from being incorporated into the power networks and the energy storage mixed power supply system said energy-storage battery is incorporated into the power networks and is with the pattern of carrying to comprise:
When power supply is ended in said photovoltaic power supply source; Said city net has electricity, and said energy-storage battery is when judge allowing discharge, and said energy-storage battery independently is that said user load is supplied power; Simultaneously the part electric energy of its storage is netted feed to said city; The two-way inverter of wherein said energy storage bimodulus is in the inversion discharge condition, and output voltage is followed urban network electricity and pressed, and said photovoltaic bimodulus inverter is in cut-off state.
8. photovoltaic as claimed in claim 3 is characterized in that from being incorporated into the power networks and the energy storage mixed power supply system the said city guipure pattern of carrying comprises:
When said photovoltaic power supply source by power supply, city's net has electricity, and said energy-storage battery not to be when allowing to discharge through judging, said city net is independent be that said user load is supplied power, wherein said photovoltaic bimodulus inverter and the two-way inverter of energy storage bimodulus all are in cut-off state.
9. photovoltaic as claimed in claim 3 is characterized in that from being incorporated into the power networks and the energy storage mixed power supply system said city guipure carries and charge mode comprises:
When power supply is ended in said photovoltaic power supply source; City's net has; And when said energy-storage battery allows charging through judging; Said city net is independent to be that said user load is supplied power and for said energy-storage battery charges, the two-way inverter of wherein said energy storage bimodulus is in the rectification charging state, and said photovoltaic bimodulus inverter is in cut-off state.
10. photovoltaic as claimed in claim 3 is characterized in that from being incorporated into the power networks and the energy storage mixed power supply system said photovoltaic off-grid, energy-storage battery are incorporated into the power networks and are with the pattern of carrying to comprise:
When said photovoltaic power supply source can supply power; The net outage of said city, said user load power are greater than said photovoltaic power supply source power, and said energy-storage battery is when judging the permission discharge; It is said user load power supply that said photovoltaic power supply source and energy-storage battery are incorporated into the power networks common; Wherein said photovoltaic bimodulus inverter is from adjusting output voltage, and the two-way inverter of said energy storage bimodulus is in the inversion discharge condition, and output voltage is followed the output voltage of said photovoltaic bimodulus inverter.
11. photovoltaic as claimed in claim 3 is characterized in that from being incorporated into the power networks and the energy storage mixed power supply system, said photovoltaic off-grid, band carry, charging and absorption mode comprise:
When said photovoltaic power supply source can supply power; The net outage of said city, said user load power is less than said photovoltaic power supply source power, and said energy-storage battery is when judgement needs charging; Said photovoltaic power supply source is separately said user load power supply; Dump energy is preferably the charging of said energy-storage battery, also has residue to be absorbed by said absorbing load, and perhaps the power output through regulating said photovoltaic power supply source is to reach the coupling of terminal power; Wherein said photovoltaic bimodulus inverter is from adjusting output voltage, and the two-way inverter of said energy storage bimodulus is in the rectification charging state.
12. photovoltaic as claimed in claim 3 is characterized in that from being incorporated into the power networks and the energy storage mixed power supply system said energy-storage battery comprises from the guipure pattern of carrying:
When power supply is ended in said photovoltaic power supply source; The net outage of said city; When said energy-storage battery can discharge through judging, independently be said user load power supply by said energy-storage battery, wherein said photovoltaic bimodulus inverter is in cut-off state; The two-way inverter of said energy storage bimodulus is in the inversion discharge condition, the output voltage of adjusting certainly.
13. like each described photovoltaic of claim 1-12 from being incorporated into the power networks and the energy storage mixed power supply system; It is characterized in that; Also comprise central controller; Said central controller is used to monitor the real-time status of said each building block of electric power system, and judges and control the work at present pattern of said electric power system according to real-time status information.
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