CN201904645U - Photovoltaic UPS system - Google Patents

Photovoltaic UPS system Download PDF

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Publication number
CN201904645U
CN201904645U CN2010206845761U CN201020684576U CN201904645U CN 201904645 U CN201904645 U CN 201904645U CN 2010206845761 U CN2010206845761 U CN 2010206845761U CN 201020684576 U CN201020684576 U CN 201020684576U CN 201904645 U CN201904645 U CN 201904645U
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circuit
ups
switch
photovoltaic
network
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CN2010206845761U
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Inventor
于玮
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Guangdong East Power Co Ltd
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Guangdong East Power 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
    • Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
    • Y02B10/00—Integration of renewable energy sources in buildings
    • Y02B10/70—Hybrid systems, e.g. uninterruptible or back-up power supplies integrating renewable energies
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E10/00—Energy generation through renewable energy sources
    • Y02E10/50—Photovoltaic [PV] energy
    • Y02E10/56—Power conversion systems, e.g. maximum power point trackers

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Abstract

The utility model provides a photovoltaic UPS (uninterruptible power supply) system. The photovoltaic UPS system comprises a photovoltaic cell, a rectifier circuit, a storage cell, a DC/DC (direct current/direct current) voltage reduction circuit connected with an AC power grid, a DC/DC voltage boost circuit, a UPS inverter circuit connected with a load, a charge-discharge controller, a detection circuit and switches (K1,K2, K3 and K4), wherein the DC/DC voltage boost circuit is connected with the photovoltaic cell; one end of the switch K1, one end of the switch K2 and one end of the switch K3 are connected with the storage cell; the other end of the switch K1 is connected with the DC/DC voltage reduction circuit; the other end of the switch K2 is connected with the DC/DC voltage boost circuit; the other end of the switch K3 is connected with an UPS inverter; one end of the switch K4 is connected with the AC power 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; and the detection circuit and the UPS inverter circuit are connected with the charge-discharge controller. The photovoltaic UPS system has various power supply manners, can maximally utilize the solar energy and has high efficiency.

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 structure 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 2010206845761100002DEST_PATH_IMAGE002
, maximum voltage is that establishing DC/DC reduction voltage circuit power output is that DC/DC booster circuit power output is
Figure 2010206845761100002DEST_PATH_IMAGE004
, DC/DC booster circuit output current is
Figure 2010206845761100002DEST_PATH_IMAGE006
, DC/DC booster circuit output minimum current is
Figure 2010206845761100002DEST_PATH_IMAGE008
, the storage battery power output is
Figure 2010206845761100002DEST_PATH_IMAGE010
, bearing power is, testing circuit detect in the circuit,
Figure 2010206845761100002DEST_PATH_IMAGE012
,
Figure 554232DEST_PATH_IMAGE004
,
Figure 2010206845761100002DEST_PATH_IMAGE014
,
Figure 967152DEST_PATH_IMAGE010
,
Figure 2010206845761100002DEST_PATH_IMAGE016
, and send charging-discharging controller to;
B: charging-discharging controller according to testing circuit detect,
Figure 468672DEST_PATH_IMAGE012
,,
Figure 2010206845761100002DEST_PATH_IMAGE018
,
Figure 167375DEST_PATH_IMAGE010
,
Figure 333915DEST_PATH_IMAGE016
Value is calculated, and judgment task state, and then the closure state of control switch K1, K2, K3, K4 at that time, changed step C over to, when, and The time, change step D over to; And
Figure 2010206845761100002DEST_PATH_IMAGE022
The time, change step e over to; When
Figure 2010206845761100002DEST_PATH_IMAGE024
,
Figure 2010206845761100002DEST_PATH_IMAGE026
And
Figure 2010206845761100002DEST_PATH_IMAGE028
The time, change step F over to; When The time, change step G over to;
C: charging-discharging controller power controlling switching tube, Disconnect,
Figure 2010206845761100002DEST_PATH_IMAGE034
,
Figure 2010206845761100002DEST_PATH_IMAGE036
Closure, be the photovoltaic cell state that works alone 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 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 2010206845761100002DEST_PATH_IMAGE042
,
Figure 255470DEST_PATH_IMAGE032
Disconnect,
Figure 52525DEST_PATH_IMAGE034
, 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 Disconnect,
Figure 710219DEST_PATH_IMAGE042
, , Closure, the DC/DC reduction voltage circuit that be connected with AC network this moment is to charge to storage battery, 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 158890DEST_PATH_IMAGE036
Disconnect,
Figure 417964DEST_PATH_IMAGE042
Disconnect,
Figure 548731DEST_PATH_IMAGE034
,
Figure 749905DEST_PATH_IMAGE032
Closure, this moment the AC network operate as normal, when
Figure 2010206845761100002DEST_PATH_IMAGE044
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 647848DEST_PATH_IMAGE040
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 959880DEST_PATH_IMAGE034
,
Figure 758203DEST_PATH_IMAGE036
Disconnect,
Figure 130279DEST_PATH_IMAGE042
,
Figure 201003DEST_PATH_IMAGE032
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 the state of working alone, therefore no matter AC network normally whether, system works in the condition of this pattern is:
Figure 2010206845761100002DEST_PATH_IMAGE046
, and
Figure 2010206845761100002DEST_PATH_IMAGE048
With
Figure 2010206845761100002DEST_PATH_IMAGE050
Magnitude relationship determined the DC/DC booster circuit to work in MPPT mode or constant voltage charging method.When
Figure 441360DEST_PATH_IMAGE038
The time DC/DC booster circuit work in the MPPT mode, this moment, present embodiment was in mode of operation 1, the DC/DC booster circuit worked in constant voltage charging method at that time, this moment, present embodiment was in mode of operation 2.This moment power switch pipe
Figure 343457DEST_PATH_IMAGE042
,
Figure 138631DEST_PATH_IMAGE032
Disconnect,, 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: And 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 163536DEST_PATH_IMAGE032
Disconnect,
Figure 920139DEST_PATH_IMAGE034
,
Figure 571701DEST_PATH_IMAGE036
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 803968DEST_PATH_IMAGE052
And
Figure 261494DEST_PATH_IMAGE022
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 175399DEST_PATH_IMAGE024
, and
Figure 76490DEST_PATH_IMAGE028
, and size determined the DC/DC booster circuit to work in MPPT mode or constant voltage charging method.When
Figure 405840DEST_PATH_IMAGE044
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.Power switch pipe disconnection this moment,
Figure 319625DEST_PATH_IMAGE042
Disconnect,
Figure 640885DEST_PATH_IMAGE034
, closure, the DC/DC reduction voltage circuit is closed, photovoltaic cell is a charge in batteries, 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 129635DEST_PATH_IMAGE030
This moment, present embodiment was in mode of operation 8 power switch pipes
Figure 945275DEST_PATH_IMAGE034
,
Figure 530977DEST_PATH_IMAGE036
Disconnect, , 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 switches to realize the intelligence between the various states of UPS.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
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.
CN2010206845761U 2010-12-28 2010-12-28 Photovoltaic UPS system Expired - Lifetime CN201904645U (en)

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Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102082462A (en) * 2010-12-28 2011-06-01 广东易事特电源股份有限公司 Photovoltaic UPS system and control method
CN102624045A (en) * 2012-02-23 2012-08-01 国彪电源集团有限公司 Medium-voltage emergency power supply for guaranteeing charge by means of boosting and rectifying
TWI502848B (en) * 2013-03-19 2015-10-01 Nat Univ Chin Yi Technology A portable solar energy recharging module
CN105471055A (en) * 2015-12-31 2016-04-06 西安特锐德智能充电科技有限公司 Energy storage system for charging electric vehicle

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102082462A (en) * 2010-12-28 2011-06-01 广东易事特电源股份有限公司 Photovoltaic UPS system and control method
CN102082462B (en) * 2010-12-28 2013-07-31 广东易事特电源股份有限公司 Photovoltaic UPS system and control method
CN102624045A (en) * 2012-02-23 2012-08-01 国彪电源集团有限公司 Medium-voltage emergency power supply for guaranteeing charge by means of boosting and rectifying
CN102624045B (en) * 2012-02-23 2014-12-17 国彪电源集团有限公司 Medium-voltage emergency power supply for guaranteeing charge by means of boosting and rectifying
TWI502848B (en) * 2013-03-19 2015-10-01 Nat Univ Chin Yi Technology A portable solar energy recharging module
CN105471055A (en) * 2015-12-31 2016-04-06 西安特锐德智能充电科技有限公司 Energy storage system for charging electric vehicle

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