CN201918758U - Photovoltaic UPS (Uninterrupted Power Supply) system - Google Patents

Photovoltaic UPS (Uninterrupted Power Supply) system Download PDF

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Publication number
CN201918758U
CN201918758U CN2010206910243U CN201020691024U CN201918758U CN 201918758 U CN201918758 U CN 201918758U CN 2010206910243 U CN2010206910243 U CN 2010206910243U CN 201020691024 U CN201020691024 U CN 201020691024U CN 201918758 U CN201918758 U CN 201918758U
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circuit
ups
photovoltaic
network
photovoltaic cell
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CN2010206910243U
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Chinese (zh)
Inventor
于玮
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EAST ELECTRIC SYSTEM TECHNOLOGY Co Ltd
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EAST ELECTRIC SYSTEM TECHNOLOGY Co Ltd
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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

Abstract

A photovoltaic UPS system comprises a photovoltaic cell, a rectifier circuit, a storage battery, a DC/DC (direct current/direct current) step-down circuit, a DC/DC step-up circuit, a UPS inverter circuit, a charging/discharging controller, a detection circuit and switches (K1, K2, K3, K4), the DC/DC step-down circuit is connected with an alternating-current grid, the UPS inverter circuit is connected with a load, the DC/DC step-up circuit is connected with the photovoltaic cell, one end of each of the switch (K1, K2, K3) is connected with the storage battery, the other end of the switch (K1) is connected with the DC/DC step-down circuit, the other end of the switch (K2) is connected with the DC/DC step-up circuit, the other end of the switch (K3) is connected with the UPS inverter circuit, one end of the switch (K4) is connected with the alternating-current grid, the other end of the switch (K4) is connected with the rectifier circuit, the other end of the rectifier circuit is connected with the UPS inverter circuit, and the detection circuit and the UPS inverter circuit are connected with the charging/discharging controller. The photovoltaic UPS system has a variety of power supply modes, and utilizes solar energy to the max, and the system efficiency is high.

Description

A kind of photovoltaic ups system
Technical field
The utility model relates to photovoltaic inverter field, relates in particular to the photovoltaic ups system.
Background technology
Photovoltaic power generation technology is as a kind of emerging clean energy resource industry, and development recent years is compared with traditional energy rapidly, advantage such as have environmental protection, can reuse.Implemented photovoltaic roof electricity generation system in countries such as the U.S., Japan, Germany, France, UPS has been widely used in each occasion of industrial production and resident living as the breakpoint protective device of important load.Photovoltaic cell and UPS combined better to bring into play both advantages, realize the maximum utilization of resource.
The utility model content
The purpose of this utility model is to provide a kind of photovoltaic ups system at the deficiencies in the prior art, and its supply power mode is various, utilizes solar energy, system effectiveness height substantially.
The purpose of this utility model realizes by following technical measures:
A kind of photovoltaic ups system, comprise photovoltaic cell, rectification circuit, storage battery, the DC/DC reduction voltage circuit that is connected with AC network, the DC/DC booster circuit, the UPS inverter circuit that is connected with load, charging-discharging controller, testing circuit, the DC/DC booster circuit is connected with photovoltaic cell, also comprise K switch 1, K2, K3, K4, K1, K2, the end of K3 is connected with storage battery, the other end of K1 is connected with the DC/DC reduction voltage circuit, the other end of K2 is connected with the DC/DC booster circuit, the other end UPS inverter of K3 connects, the end of K4 is connected with AC network, the other end of K4 is connected with rectification circuit, the rectification circuit other end is connected testing circuit with the UPS inverter, the UPS inverter circuit is connected with charging-discharging controller.
Wherein, also comprise power factor correction circuit, power factor correction circuit one end is connected with rectification circuit, and the power factor correction circuit other end is connected with the UPS inverter.
Wherein, also be provided with second rectification circuit between DC/DC reduction voltage circuit and the AC network, second rectification circuit, one end is connected with AC network, and the second rectification circuit other end is connected with the DC/DC reduction voltage circuit.
Wherein, K switch 1, K2, K3, K4 are power switch pipe, and K1, K2, K3, K4 are connected with charging-discharging controller.
The utility model beneficial effect is: a kind of photovoltaic ups system, comprise photovoltaic cell, rectification circuit, storage battery, the DC/DC reduction voltage circuit that is connected with AC network, the DC/DC booster circuit, the UPS inverter circuit that is connected with load, charging-discharging controller, testing circuit, the DC/DC booster circuit is connected with photovoltaic cell, also comprise K switch 1, K2, K3, K4, K1, K2, the end of K3 is connected with storage battery, the other end of K1 is connected with the DC/DC reduction voltage circuit, the other end of K2 is connected with the DC/DC booster circuit, the other end UPS inverter of K3 connects, the end of K4 is connected with AC network, the other end of K4 is connected with rectification circuit, the rectification circuit other end is connected with the UPS inverter, testing circuit, the UPS inverter circuit is connected with charging-discharging controller, the utility model is intelligently realized the automatic conversion between the various different working modes of UPS, supply power mode is various, utilizes solar energy substantially, the system effectiveness height.
Description of drawings
Fig. 1 is a structured flowchart of the present utility model;
Fig. 2 is mode of operation 1 of the present utility model or mode of operation 2;
Fig. 3 is a mode of operation 3 of the present utility model;
Fig. 4 is AC network of the present utility model mode of operation 4 or a mode of operation 5 just often;
Fig. 5 is AC network of the present utility model mode of operation 6 or a mode of operation 7 just often;
Fig. 6 is an AC network of the present utility model mode of operation 8 just often.
Embodiment
Below in conjunction with accompanying drawing the utility model is further described, as Fig. 1-shown in Figure 6.
Embodiment 1
A kind of photovoltaic ups system, comprise photovoltaic cell, rectification circuit, storage battery, the DC/DC reduction voltage circuit that is connected with AC network, the DC/DC booster circuit, the UPS inverter circuit that is connected with load, charging-discharging controller, testing circuit, the DC/DC booster circuit is connected with photovoltaic cell, also comprise K switch 1, K2, K3, K4, K1, K2, the end of K3 is connected with storage battery, the other end of K1 is connected with the DC/DC reduction voltage circuit, the other end of K2 is connected with the DC/DC booster circuit, the other end UPS inverter of K3 connects, the end of K4 is connected with AC network, the other end of K4 is connected with rectification circuit, the rectification circuit other end is connected with the UPS inverter, testing circuit, the UPS inverter circuit is connected with charging-discharging controller, the utility model is intelligently realized the automatic conversion between the various different working modes of UPS, the supply power mode variation, and maximally utilising the light sun can, guaranteed the power supply quality of load and the uninterrupted power supply of important load, system effectiveness height.
Present embodiment also comprise power factor correction circuit, power factor correction circuit one end is connected with rectification circuit, the power factor correction circuit other end is connected with the UPS inverter.
Also be provided with second rectification circuit between the DC/DC reduction voltage circuit of present embodiment and the AC network, second rectification circuit, one end is connected with AC network, and the second rectification circuit other end is connected with the DC/DC reduction voltage circuit.
The K switch 1 of present embodiment, K2, K3, K4 are power switch pipe, and K1, K2, K3, K4 are connected with charging-discharging controller.
Present embodiment realize automatic conversion between the various different working modes of UPS by the following method,
A: establishing the storage battery low-voltage set point is that Vbmin1, the minimum discharge voltage of storage battery are Vbmin2, and battery tension is
Figure 2010206910243100002DEST_PATH_IMAGE001
, maximum voltage is
Figure 2010206910243100002DEST_PATH_IMAGE002
, establish DC/DC reduction voltage circuit power output and be
Figure 2010206910243100002DEST_PATH_IMAGE003
, DC/DC booster circuit power output is
Figure 2010206910243100002DEST_PATH_IMAGE004
, DC/DC booster circuit output current is , DC/DC booster circuit output minimum current is
Figure 2010206910243100002DEST_PATH_IMAGE006
, the storage battery power output is
Figure 2010206910243100002DEST_PATH_IMAGE007
, bearing power is
Figure 2010206910243100002DEST_PATH_IMAGE008
, testing circuit detects in the circuit
Figure 724392DEST_PATH_IMAGE001
,
Figure 579216DEST_PATH_IMAGE003
,
Figure 35650DEST_PATH_IMAGE004
,
Figure 2010206910243100002DEST_PATH_IMAGE009
,
Figure 555493DEST_PATH_IMAGE007
, , and send charging-discharging controller to;
B: charging-discharging controller detects according to testing circuit
Figure 818426DEST_PATH_IMAGE001
,
Figure 23142DEST_PATH_IMAGE003
,
Figure 408993DEST_PATH_IMAGE004
,
Figure 2010206910243100002DEST_PATH_IMAGE010
,
Figure 703971DEST_PATH_IMAGE007
,
Figure 635018DEST_PATH_IMAGE008
Value is calculated, judgment task state, and then the closure state of control switch K1, K2, K3, K4, when The time, change step C over to, when
Figure 2010206910243100002DEST_PATH_IMAGE012
, and
Figure DEST_PATH_IMAGE013
The time, change step D over to;
Figure 327030DEST_PATH_IMAGE012
And
Figure 2010206910243100002DEST_PATH_IMAGE014
The time, change step e over to; When
Figure 2010206910243100002DEST_PATH_IMAGE015
And
Figure 2010206910243100002DEST_PATH_IMAGE016
The time, change step F over to; When
Figure 2010206910243100002DEST_PATH_IMAGE017
The time, change step G over to;
C: charging-discharging controller power controlling switching tube
Figure 2010206910243100002DEST_PATH_IMAGE018
,
Figure 2010206910243100002DEST_PATH_IMAGE019
Disconnect,
Figure 2010206910243100002DEST_PATH_IMAGE020
,
Figure 2010206910243100002DEST_PATH_IMAGE021
Closure, be photovoltaic cell independence generating state this moment, and photovoltaic cell is an electric, and photovoltaic cell charges a battery simultaneously, when The time, the DC/DC booster circuit that is connected with photovoltaic cell works in the MPPT mode, and the MPPT mode is the generating voltage of charging-discharging controller detecting real-time solar panels, and follows the trail of maximum voltage value, makes system reach the highest efficient, when
Figure 66972DEST_PATH_IMAGE013
The time, the DC/DC booster circuit that is connected with photovoltaic cell works in constant voltage charging method;
D: charging-discharging controller power controlling switching tube
Figure 528040DEST_PATH_IMAGE018
,
Figure 658018DEST_PATH_IMAGE019
Disconnect,
Figure 837327DEST_PATH_IMAGE020
,
Figure 299401DEST_PATH_IMAGE021
Closure, jointly be electric state for going out photovoltaic cell and storage battery this moment, photovoltaic cell and storage battery discharge simultaneously, are electric;
E: charging-discharging controller power controlling switching tube
Figure 880555DEST_PATH_IMAGE019
Disconnect,
Figure 904137DEST_PATH_IMAGE018
,
Figure 570742DEST_PATH_IMAGE020
, Closure, the DC/DC reduction voltage circuit that be connected with AC network this moment is to charge to storage battery, and system is in the state of generating electricity by way of merging two or more grid systems, and photovoltaic cell and DC/DC reduction voltage circuit are that charge in batteries and official document are electric jointly;
F: charging-discharging controller power controlling switching tube
Figure 272168DEST_PATH_IMAGE021
Disconnect,
Figure 669913DEST_PATH_IMAGE018
Disconnect,
Figure 433601DEST_PATH_IMAGE020
, Closure, this moment the AC network operate as normal, when The time, the DC/DC booster circuit that is connected with photovoltaic cell works in the MPPT mode, and the MPPT mode is the generating voltage of charging-discharging controller detecting real-time solar panels, and follows the trail of maximum voltage value, makes system reach the highest efficient, when
Figure 730907DEST_PATH_IMAGE013
The time, the DC/DC booster circuit that is connected with photovoltaic cell works in constant voltage charging method, and the DC/DC reduction voltage circuit that is connected with AC network is closed, and photovoltaic cell is a charge in batteries, and AC network provides energy to load;
G: charging-discharging controller power controlling switching tube
Figure 299554DEST_PATH_IMAGE020
, Disconnect, , Closure, AC network provides energy to load, simultaneously storage battery is charged, and the DC/DC booster circuit that is connected with photovoltaic cell cuts out, and the DC/DC reduction voltage circuit that is connected with AC network charges a battery.
Before being electric among the step C of present embodiment, step D, step e, step F, the step G, power factor correction circuit is corrected power factor (PF), after power factor correction circuit is corrected power factor (PF), through powering load after the inversion of UPS inverter circuit.
Before AC network was electric among the step F of present embodiment, the step G, rectification circuit further carried out rectification to alternating current.
The alternating current of the AC network of present embodiment is before entering the DC/DC reduction voltage circuit, through the second rectification circuit rectification.
As shown in Figure 2, the photovoltaic cell energy is not only exported to load equipment, and some is stored in the storage battery, and promptly system works is in independent generating state, therefore no matter AC network normally whether, system works in the condition of this pattern is:
Figure 681808DEST_PATH_IMAGE011
, and With
Figure 233137DEST_PATH_IMAGE002
Magnitude relationship determined the DC/DC booster circuit to work in MPPT mode or constant voltage charging method.When The time DC/DC booster circuit work in the MPPT mode, this moment, present embodiment was in mode of operation 1, when
Figure 269674DEST_PATH_IMAGE013
The time DC/DC booster circuit work in constant voltage charging method, this moment, present embodiment was in mode of operation 2.This moment power switch pipe
Figure 491708DEST_PATH_IMAGE018
, Disconnect, ,
Figure 39781DEST_PATH_IMAGE021
Closure, photovoltaic cell provides energy to load and charges a battery.
As shown in Figure 3, photovoltaic cell energy and storage battery energy are the load equipment power supply jointly, therefore no matter AC network normally whether, system works in the condition of this pattern is:
Figure 229454DEST_PATH_IMAGE012
And
Figure 66960DEST_PATH_IMAGE013
, the DC/DC booster circuit works in the MPPT mode, and this moment, present embodiment was in mode of operation 3, power switch pipe
Figure 321486DEST_PATH_IMAGE018
,
Figure 685471DEST_PATH_IMAGE019
Disconnect,
Figure 734461DEST_PATH_IMAGE020
,
Figure 59263DEST_PATH_IMAGE021
Closure, photovoltaic cell and storage battery discharge simultaneously.
As shown in Figure 4, the photovoltaic cell energy shortage is to supply with load equipment, and because thereby the storage battery energy deficiency must start the DC/DC reduction voltage circuit so that storage battery is charged, be that system is in the state of generating electricity by way of merging two or more grid systems, this moment, present embodiment was in mode of operation 4 or mode of operation 5, so the condition that AC network just often works in this pattern is:
Figure 616015DEST_PATH_IMAGE012
And This moment, the DC/DC reduction voltage circuit worked in the constant current charge stage,, the DC/DC booster circuit works in the MPPT mode, and photovoltaic cell and DC/DC reduction voltage circuit are that charger provides energy for charge in batteries and to load jointly.
As shown in Figure 5, photovoltaic cell energy and storage battery energy be all much smaller than load equipment institute energy requirement, so the condition that AC network just often works in this pattern is:
Figure 867447DEST_PATH_IMAGE015
And
Figure 663234DEST_PATH_IMAGE016
, and
Figure 774409DEST_PATH_IMAGE024
Size determined the DC/DC booster circuit to work in MPPT mode or constant voltage charging method.When
Figure 411189DEST_PATH_IMAGE023
The time DC/DC booster circuit work in the MPPT mode, this moment, present embodiment was in mode of operation 6, when The time DC/DC booster circuit work in constant voltage charging method, this moment, present embodiment was in mode of operation 7.Wherein
Figure DEST_PATH_IMAGE025
Be the minimum discharge voltage of storage battery.This moment power switch pipe
Figure 288327DEST_PATH_IMAGE021
Disconnect,
Figure 62248DEST_PATH_IMAGE018
Disconnect,
Figure 615851DEST_PATH_IMAGE020
,
Figure 692391DEST_PATH_IMAGE019
Closure, the DC/DC reduction voltage circuit is closed, and photovoltaic cell is a charge in batteries, and AC network provides energy to load.
As shown in Figure 6, the photovoltaic cell energy is zero, and start the UPS function this moment, and promptly AC network provides all required energy of system, not only supplies load equipment institute energy requirement, and storage battery is charged.Therefore AC network just often works in the condition of this pattern and is:
Figure 462770DEST_PATH_IMAGE017
This moment, present embodiment was in mode of operation 8 power switch pipes
Figure 650169DEST_PATH_IMAGE020
, Disconnect,
Figure 758250DEST_PATH_IMAGE018
,
Figure 466792DEST_PATH_IMAGE019
Closure, the DC/DC booster circuit cuts out.The DC/DC reduction voltage circuit works in constant voltage or constant current charge stage, and AC network provides energy for charge in batteries and to load.
Table 1 is under the AC network normal condition, and switching condition between the various mode of operations of system to realize independent generating, generates electricity by way of merging two or more grid systems, and the intelligence between three main system states of UPS is switched.Mainly be according to the magnitude relationship between photovoltaic cell energy, storage battery energy, the energy requirement three of load equipment institute determine system works in where mode of operation.
Table 1
Figure 2010206910243100002DEST_PATH_IMAGE026
Should be noted that at last; above embodiment is only in order to the explanation the technical solution of the utility model; but not to the restriction of the utility model protection range; although the utility model has been done to explain with reference to preferred embodiment; those of ordinary skill in the art is to be understood that; can make amendment or be equal to replacement the technical solution of the utility model, and not break away from the essence and the scope of technical solutions of the utility model.

Claims (4)

1. photovoltaic ups system, comprise photovoltaic cell, rectification circuit, storage battery, the DC/DC reduction voltage circuit that is connected with AC network, the DC/DC booster circuit, the UPS inverter circuit that is connected with load, charging-discharging controller, testing circuit, the DC/DC booster circuit is connected with photovoltaic cell, it is characterized in that: also comprise K switch 1, K2, K3, K4, K1, K2, the end of K3 is connected with storage battery, the other end of K1 is connected with the DC/DC reduction voltage circuit, the other end of K2 is connected with the DC/DC booster circuit, the other end UPS inverter of K3 connects, the end of K4 is connected with AC network, the other end of K4 is connected with rectification circuit, the rectification circuit other end is connected testing circuit with the UPS inverter, the UPS inverter circuit is connected with charging-discharging controller.
2. a kind of photovoltaic ups system according to claim 1 is characterized in that: also comprise power factor correction circuit, power factor correction circuit one end is connected with rectification circuit, and the power factor correction circuit other end is connected with the UPS inverter.
3. a kind of photovoltaic ups system according to claim 2, it is characterized in that: also be provided with second rectification circuit between DC/DC reduction voltage circuit and the AC network, second rectification circuit, one end is connected with AC network, and the second rectification circuit other end is connected with the DC/DC reduction voltage circuit.
4. according to any described a kind of photovoltaic ups system of claim 1-3, it is characterized in that: K switch 1, K2, K3, K4 are power switch pipe, and K1, K2, K3, K4 are connected with charging-discharging controller.
CN2010206910243U 2010-12-30 2010-12-30 Photovoltaic UPS (Uninterrupted Power Supply) system Expired - Fee Related CN201918758U (en)

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102005803A (en) * 2010-12-30 2011-04-06 易事特电力系统技术有限公司 Photovoltaic UPS (Uninterrupted Power Supply) system and control method
CN104079233A (en) * 2013-03-25 2014-10-01 北汽福田汽车股份有限公司 Method for calculating capacity of energy storage battery cabinet in photovoltaic power generation system

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102005803A (en) * 2010-12-30 2011-04-06 易事特电力系统技术有限公司 Photovoltaic UPS (Uninterrupted Power Supply) system and control method
CN104079233A (en) * 2013-03-25 2014-10-01 北汽福田汽车股份有限公司 Method for calculating capacity of energy storage battery cabinet in photovoltaic power generation system

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Granted publication date: 20110803

Termination date: 20161230