CN102082462B - Photovoltaic UPS system and control method - Google Patents

Photovoltaic UPS system and control method Download PDF

Info

Publication number
CN102082462B
CN102082462B CN2010106088408A CN201010608840A CN102082462B CN 102082462 B CN102082462 B CN 102082462B CN 2010106088408 A CN2010106088408 A CN 2010106088408A CN 201010608840 A CN201010608840 A CN 201010608840A CN 102082462 B CN102082462 B CN 102082462B
Authority
CN
China
Prior art keywords
circuit
charging
photovoltaic cell
discharging controller
photovoltaic
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Active
Application number
CN2010106088408A
Other languages
Chinese (zh)
Other versions
CN102082462A (en
Inventor
于玮
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Guangdong East Power Co Ltd
Original Assignee
Guangdong East Power Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Guangdong East Power Co Ltd filed Critical Guangdong East Power Co Ltd
Priority to CN2010106088408A priority Critical patent/CN102082462B/en
Publication of CN102082462A publication Critical patent/CN102082462A/en
Application granted granted Critical
Publication of CN102082462B publication Critical patent/CN102082462B/en
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Images

Classifications

    • 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

Landscapes

  • Charge And Discharge Circuits For Batteries Or The Like (AREA)

Abstract

The invention discloses a photovoltaic uninterrupted power supply (UPS) system and a control method. The system comprises a photovoltaic battery, a rectifying circuit, a storage battery, a DC/DC buck circuit connected with an alternating current power grid, a DC/DC boost circuit, a UPS inverter circuit connected with a load, a charging/discharging controller and a detection circuit, wherein the DC/DC boost circuit is connected with a photovoltaic battery; the system also comprises a switch K1, a switch K2, a switch K3 and a switch K4, wherein one end of the K1, one end of the K2 and one end of the K3 are connected with the storage battery; the other end of the K1 is connected with the DC/DC buck circuit; the other end of the K2 is connected with the DC/DC boost circuit; the other end of the K3 is connected with a UPS inverter; one end of the K4 is connected with the alternating current power grid; the other end of the K4 is connected with the rectifying circuit; the other end of the rectifying circuit is connected with the UPS inverter; and the detection circuit and the UPS inverter circuit are connected with the charging/discharging circuit controller. The system has various power supply modes, maximally utilizes solar energy and has high system efficiency.

Description

A kind of photovoltaic ups system and control method
Technical field
The present invention relates to photovoltaic inverter field, relate in particular to photovoltaic ups system and control method.
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.
Summary of the invention
The objective of the invention is to provides 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.
Purpose of the present invention 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.
A kind of photovoltaic ups system control method comprises the steps:
A: establishing the storage battery low-voltage set point is V Bmin1, the minimum discharge voltage of storage battery is V Bmin2, battery tension is
Figure 2010106088408100002DEST_PATH_IMAGE001
, maximum voltage is , establish DC/DC reduction voltage circuit power output and be
Figure 2010106088408100002DEST_PATH_IMAGE003
, DC/DC booster circuit power output is
Figure 2010106088408100002DEST_PATH_IMAGE004
, DC/DC booster circuit output current is
Figure 2010106088408100002DEST_PATH_IMAGE005
, DC/DC booster circuit output minimum current is
Figure 2010106088408100002DEST_PATH_IMAGE006
, the storage battery power output is
Figure 2010106088408100002DEST_PATH_IMAGE007
, bearing power is
Figure 2010106088408100002DEST_PATH_IMAGE008
, testing circuit detects in the circuit
Figure 2010106088408100002DEST_PATH_IMAGE009
,
Figure 2010106088408100002DEST_PATH_IMAGE010
,
Figure 925671DEST_PATH_IMAGE004
,
Figure 2010106088408100002DEST_PATH_IMAGE011
,
Figure 2010106088408100002DEST_PATH_IMAGE012
,
Figure 279029DEST_PATH_IMAGE008
, and send charging-discharging controller to;
B: charging-discharging controller detects according to testing circuit
Figure 58767DEST_PATH_IMAGE009
, ,
Figure 268348DEST_PATH_IMAGE004
,
Figure 2010106088408100002DEST_PATH_IMAGE013
,
Figure 28494DEST_PATH_IMAGE012
, Value is calculated, judgment task state, and then the closure state of control switch K1, K2, K3, K4, when
Figure 2010106088408100002DEST_PATH_IMAGE014
The time, change step C over to, when
Figure 2010106088408100002DEST_PATH_IMAGE015
, and
Figure 2010106088408100002DEST_PATH_IMAGE016
The time, change step D over to;
Figure 432110DEST_PATH_IMAGE015
And
Figure 2010106088408100002DEST_PATH_IMAGE017
The time, change step e over to; When
Figure 2010106088408100002DEST_PATH_IMAGE018
,
Figure 2010106088408100002DEST_PATH_IMAGE019
And
Figure 2010106088408100002DEST_PATH_IMAGE020
The time, change step F over to; When
Figure 2010106088408100002DEST_PATH_IMAGE021
The time, change step G over to;
C: charging-discharging controller power controlling switching tube , Disconnect,
Figure 2010106088408100002DEST_PATH_IMAGE024
,
Figure 2010106088408100002DEST_PATH_IMAGE025
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
Figure 2010106088408100002DEST_PATH_IMAGE026
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 2010106088408100002DEST_PATH_IMAGE027
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 415503DEST_PATH_IMAGE022
,
Figure 408867DEST_PATH_IMAGE023
Disconnect,
Figure 163196DEST_PATH_IMAGE024
,
Figure 837891DEST_PATH_IMAGE025
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 245553DEST_PATH_IMAGE025
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 889024DEST_PATH_IMAGE025
Disconnect,
Figure 224190DEST_PATH_IMAGE022
Disconnect,
Figure 953112DEST_PATH_IMAGE024
,
Figure 468145DEST_PATH_IMAGE023
Closure, this moment the AC network operate as normal, when
Figure 2010106088408100002DEST_PATH_IMAGE028
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 966122DEST_PATH_IMAGE027
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 737769DEST_PATH_IMAGE024
,
Figure 626091DEST_PATH_IMAGE025
Disconnect, ,
Figure 861080DEST_PATH_IMAGE023
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 work that is connected with AC network charges a battery.
Wherein, be electric among step C, step D, step e, step F, the step G before, 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.
Wherein, before AC network was electric among step F, the step G, rectification circuit further carried out rectification to alternating current.
Wherein, among step e and the step G, the alternating current of AC network is before entering the DC/DC reduction voltage circuit, through the second rectification circuit rectification.
Beneficial effect of the present invention 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 present invention intelligently realizes 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 the structured flowchart of an embodiment of photovoltaic ups system of the present invention.
Fig. 2 is mode of operation 1 or the mode of operation 2 of an embodiment of photovoltaic ups system of the present invention.
Fig. 3 is the mode of operation 3 of an embodiment of photovoltaic ups system of the present invention.
Fig. 4 is that an embodiment of photovoltaic ups system of the present invention is in AC network mode of operation 4 or mode of operation 5 just often.
Fig. 5 is that an embodiment of photovoltaic ups system of the present invention is in AC network mode of operation 6 or mode of operation 7 just often.
Fig. 6 is that an embodiment of photovoltaic ups system of the present invention is in AC network mode of operation 8 just often.
Embodiment
The present invention is further illustrated below in conjunction with accompanying drawing, 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 present invention intelligently realizes 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.
Embodiment 2
A kind of photovoltaic ups system control method comprises the steps:
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 , maximum voltage is
Figure 2010106088408100002DEST_PATH_IMAGE029
, establish DC/DC reduction voltage circuit power output and be , DC/DC booster circuit power output is
Figure 599863DEST_PATH_IMAGE004
, DC/DC booster circuit output current is
Figure 72432DEST_PATH_IMAGE005
, DC/DC booster circuit output minimum current is
Figure 123565DEST_PATH_IMAGE006
, the storage battery power output is
Figure 48796DEST_PATH_IMAGE012
, bearing power is
Figure 273104DEST_PATH_IMAGE008
, testing circuit detects in the circuit
Figure 334601DEST_PATH_IMAGE009
,
Figure 58099DEST_PATH_IMAGE010
, ,
Figure 498625DEST_PATH_IMAGE011
,
Figure 680208DEST_PATH_IMAGE012
,
Figure 869881DEST_PATH_IMAGE008
, and send charging-discharging controller to;
B: charging-discharging controller detects according to testing circuit
Figure 707387DEST_PATH_IMAGE009
,
Figure 273497DEST_PATH_IMAGE010
,
Figure 575165DEST_PATH_IMAGE004
,
Figure 935740DEST_PATH_IMAGE013
,
Figure 260542DEST_PATH_IMAGE012
,
Figure 630343DEST_PATH_IMAGE008
Value is calculated, judgment task state, and then the closure state of control switch K1, K2, K3, K4, when
Figure 520939DEST_PATH_IMAGE014
The time, change step C over to, when , and
Figure 864513DEST_PATH_IMAGE016
The time, change step D over to;
Figure 38005DEST_PATH_IMAGE015
And
Figure 484904DEST_PATH_IMAGE017
The time, change step e over to; When ,
Figure 486676DEST_PATH_IMAGE019
And
Figure 198280DEST_PATH_IMAGE020
The time, change step F over to; When
Figure 1151DEST_PATH_IMAGE021
The time, change step G over to;
C: charging-discharging controller power controlling switching tube ,
Figure 723436DEST_PATH_IMAGE023
Disconnect,
Figure 910835DEST_PATH_IMAGE024
,
Figure 896108DEST_PATH_IMAGE025
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
Figure 715739DEST_PATH_IMAGE027
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 706829DEST_PATH_IMAGE022
,
Figure 546609DEST_PATH_IMAGE023
Disconnect,
Figure 27269DEST_PATH_IMAGE024
,
Figure 257393DEST_PATH_IMAGE025
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 114491DEST_PATH_IMAGE023
Disconnect,
Figure 808777DEST_PATH_IMAGE022
,
Figure 398021DEST_PATH_IMAGE024
,
Figure 443338DEST_PATH_IMAGE025
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 838547DEST_PATH_IMAGE025
Disconnect,
Figure 823558DEST_PATH_IMAGE022
Disconnect,
Figure 911600DEST_PATH_IMAGE024
,
Figure 178633DEST_PATH_IMAGE023
Closure, this moment the AC network operate as normal, when
Figure 377533DEST_PATH_IMAGE028
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 718516DEST_PATH_IMAGE027
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 977459DEST_PATH_IMAGE024
, Disconnect,
Figure 468800DEST_PATH_IMAGE022
,
Figure 992186DEST_PATH_IMAGE023
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 photovoltaic cell works in the state of working alone, therefore no matter AC network normally whether, system works in the condition of this pattern is: , and With
Figure 335759DEST_PATH_IMAGE029
Magnitude relationship determined the DC/DC booster circuit to work in MPPT mode or constant voltage charging method.When
Figure 876462DEST_PATH_IMAGE026
The time DC/DC booster circuit work in the MPPT mode, this moment, present embodiment was in mode of operation 1, when
Figure 457616DEST_PATH_IMAGE027
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 792782DEST_PATH_IMAGE022
,
Figure 521704DEST_PATH_IMAGE023
Disconnect,
Figure 600518DEST_PATH_IMAGE024
,
Figure 549363DEST_PATH_IMAGE025
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
Figure 271648DEST_PATH_IMAGE016
, 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 154153DEST_PATH_IMAGE022
,
Figure 444320DEST_PATH_IMAGE023
Disconnect,
Figure 386869DEST_PATH_IMAGE024
,
Figure 824803DEST_PATH_IMAGE025
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, 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 245420DEST_PATH_IMAGE015
And This moment, the DC/DC reduction voltage circuit worked in the constant current charge stage, and 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 503543DEST_PATH_IMAGE018
,
Figure 428774DEST_PATH_IMAGE019
And , and
Figure 980158DEST_PATH_IMAGE030
Size determined the DC/DC booster circuit to work in MPPT mode or constant voltage charging method.When
Figure 202192DEST_PATH_IMAGE028
The time DC/DC booster circuit work in the MPPT mode, this moment, present embodiment was in mode of operation 6, when
Figure 614719DEST_PATH_IMAGE027
The time DC/DC booster circuit work in constant voltage charging method, this moment, present embodiment was in mode of operation 7.This moment power switch pipe Disconnect,
Figure 558721DEST_PATH_IMAGE022
Disconnect,
Figure 450191DEST_PATH_IMAGE024
,
Figure 350014DEST_PATH_IMAGE023
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 916125DEST_PATH_IMAGE021
This moment, present embodiment was in mode of operation 8 power switch pipes
Figure 952214DEST_PATH_IMAGE024
,
Figure 516050DEST_PATH_IMAGE025
Disconnect, ,
Figure 7392DEST_PATH_IMAGE023
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
Figure 2010106088408100002DEST_PATH_IMAGE032
Should be noted that at last; above embodiment is only in order to illustrate technical scheme of the present invention; but not limiting the scope of the invention; although the present invention 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 technical scheme of the present invention, and not break away from the essence and the scope of technical solution of the present invention.

Claims (6)

1. photovoltaic ups system, comprise photovoltaic cell, rectification circuit, storage battery, the DC/DC reduction voltage circuit that is connected by second rectification circuit 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 circuit 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 circuit, 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, the UPS inverter circuit is connected with rectification circuit by power factor correction circuit.
3. a kind of photovoltaic ups system according to claim 2 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.
4. the control method of the described a kind of photovoltaic ups system of claim 3 is characterized in that: comprise the steps:
A: establishing the storage battery low-voltage set point is V Bmin1, the minimum discharge voltage of storage battery is V Bmin2, battery tension is
Figure 2010106088408100001DEST_PATH_IMAGE001
, maximum voltage is
Figure 2010106088408100001DEST_PATH_IMAGE002
, establish DC/DC reduction voltage circuit power output and be
Figure 2010106088408100001DEST_PATH_IMAGE003
, DC/DC booster circuit power output is , DC/DC booster circuit output current is
Figure DEST_PATH_IMAGE005
, DC/DC booster circuit output minimum current is , the storage battery power output is
Figure 2010106088408100001DEST_PATH_IMAGE007
, bearing power is
Figure 2010106088408100001DEST_PATH_IMAGE008
, testing circuit detects in the circuit
Figure 6942DEST_PATH_IMAGE001
,
Figure 556610DEST_PATH_IMAGE003
,
Figure 481840DEST_PATH_IMAGE004
,
Figure 2010106088408100001DEST_PATH_IMAGE009
, ,
Figure 643011DEST_PATH_IMAGE008
, and send charging-discharging controller to;
B: charging-discharging controller detects according to testing circuit
Figure 865045DEST_PATH_IMAGE001
, ,
Figure 762297DEST_PATH_IMAGE004
,
Figure 2010106088408100001DEST_PATH_IMAGE010
,
Figure 881563DEST_PATH_IMAGE007
,
Figure 71236DEST_PATH_IMAGE008
Value is calculated, judgment task state, and then the closure state of control switch K1, K2, K3, K4, when
Figure 2010106088408100001DEST_PATH_IMAGE011
The time, change step C over to, when
Figure 2010106088408100001DEST_PATH_IMAGE012
, and
Figure 2010106088408100001DEST_PATH_IMAGE013
The time, change step D over to;
Figure 846425DEST_PATH_IMAGE012
And
Figure 2010106088408100001DEST_PATH_IMAGE014
The time, change step e over to; When
Figure 2010106088408100001DEST_PATH_IMAGE015
,
Figure 2010106088408100001DEST_PATH_IMAGE016
And
Figure 2010106088408100001DEST_PATH_IMAGE017
The time, change step F over to; When
Figure 2010106088408100001DEST_PATH_IMAGE018
The time, change step G over to;
C: charging-discharging controller power controlling switching tube
Figure 2010106088408100001DEST_PATH_IMAGE019
, Disconnect,
Figure 2010106088408100001DEST_PATH_IMAGE021
,
Figure 2010106088408100001DEST_PATH_IMAGE022
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
Figure 2010106088408100001DEST_PATH_IMAGE023
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 2010106088408100001DEST_PATH_IMAGE024
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 38634DEST_PATH_IMAGE019
,
Figure 340302DEST_PATH_IMAGE020
Disconnect, ,
Figure 25678DEST_PATH_IMAGE022
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 333163DEST_PATH_IMAGE020
Disconnect,
Figure 659977DEST_PATH_IMAGE019
,
Figure 457032DEST_PATH_IMAGE021
,
Figure 3551DEST_PATH_IMAGE022
The DC/DC reduction voltage circuit that closure, this moment and AC network are connected by second rectification circuit is to charge to storage battery, and photovoltaic cell and DC/DC reduction voltage circuit be charge in batteries jointly and be electric jointly;
F: charging-discharging controller power controlling switching tube
Figure 177043DEST_PATH_IMAGE022
Disconnect, Disconnect,
Figure 93363DEST_PATH_IMAGE021
,
Figure 127178DEST_PATH_IMAGE020
Closure, this moment the AC network operate as normal, when
Figure 2010106088408100001DEST_PATH_IMAGE025
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 272071DEST_PATH_IMAGE024
The time, the DC/DC booster circuit that is connected with photovoltaic cell works in constant voltage charging method, closes by the DC/DC reduction voltage circuit that second rectification circuit is connected with AC network, and photovoltaic cell is a charge in batteries, and AC network provides energy to load;
G: charging-discharging controller power controlling switching tube
Figure 137259DEST_PATH_IMAGE021
,
Figure 213799DEST_PATH_IMAGE022
Disconnect,
Figure 797227DEST_PATH_IMAGE019
,
Figure 984626DEST_PATH_IMAGE020
Closure, AC network provides energy to load, simultaneously storage battery is charged, the DC/DC booster circuit that is connected with photovoltaic cell cuts out, with AC network by the DC/DC reduction voltage circuit work that second rectification circuit is connected, charge a battery.
5. the control method of photovoltaic ups system according to claim 4, it is characterized in that: before being electric among step C, 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.
6. the control method of photovoltaic ups system according to claim 5 is characterized in that: before AC network was electric among step F, the step G, rectification circuit further carried out rectification to alternating current.
CN2010106088408A 2010-12-28 2010-12-28 Photovoltaic UPS system and control method Active CN102082462B (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN2010106088408A CN102082462B (en) 2010-12-28 2010-12-28 Photovoltaic UPS system and control method

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN2010106088408A CN102082462B (en) 2010-12-28 2010-12-28 Photovoltaic UPS system and control method

Publications (2)

Publication Number Publication Date
CN102082462A CN102082462A (en) 2011-06-01
CN102082462B true CN102082462B (en) 2013-07-31

Family

ID=44088240

Family Applications (1)

Application Number Title Priority Date Filing Date
CN2010106088408A Active CN102082462B (en) 2010-12-28 2010-12-28 Photovoltaic UPS system and control method

Country Status (1)

Country Link
CN (1) CN102082462B (en)

Families Citing this family (7)

* 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***技术有限公司 Photovoltaic UPS (Uninterrupted Power Supply) system and control method
CN103872784A (en) * 2012-12-07 2014-06-18 北汽福田汽车股份有限公司 Energy storage power supply cabinet and on-grid and off-grid power supply systems comprising the same
CN103545911B (en) * 2013-10-25 2015-08-19 广东易事特电源股份有限公司 A kind of uninterruptible power system of dual input intelligent power supply
CN103928962A (en) * 2014-04-24 2014-07-16 广东志成冠军集团有限公司 On-line UPS system capable of achieving energy saving by photovoltaic energy and control method thereof
CN106329576B (en) * 2016-10-19 2019-05-17 航天柏克(广东)科技有限公司 A kind of novel photovoltaic is from grid-connected inverter
CN109428388A (en) * 2017-09-01 2019-03-05 硕天科技股份有限公司 Uninterrupted power supply system
CN110611368B (en) * 2019-06-25 2021-12-24 南京巨鲨显示科技有限公司 Power-off prevention power supply and design method thereof

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101534590A (en) * 2009-04-16 2009-09-16 陆启升 Solar energy illuminating control power supply
CN201391817Y (en) * 2009-04-23 2010-01-27 赵昌余 Building solar energy illuminating device
CN101826821A (en) * 2010-02-08 2010-09-08 哈尔滨工业大学 Electric energy control method of optical network hybrid power supply uninterruptable inverter
CN201904645U (en) * 2010-12-28 2011-07-20 广东易事特电源股份有限公司 Photovoltaic UPS system

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2000102196A (en) * 1998-09-29 2000-04-07 Toshiba Corp Uninterruptible power supply
JP3936092B2 (en) * 1999-01-22 2007-06-27 株式会社Ｎｔｔファシリティーズ AC uninterruptible power supply system

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101534590A (en) * 2009-04-16 2009-09-16 陆启升 Solar energy illuminating control power supply
CN201391817Y (en) * 2009-04-23 2010-01-27 赵昌余 Building solar energy illuminating device
CN101826821A (en) * 2010-02-08 2010-09-08 哈尔滨工业大学 Electric energy control method of optical network hybrid power supply uninterruptable inverter
CN201904645U (en) * 2010-12-28 2011-07-20 广东易事特电源股份有限公司 Photovoltaic UPS system

Also Published As

Publication number Publication date
CN102082462A (en) 2011-06-01

Similar Documents

Publication Publication Date Title
CN102005803A (en) Photovoltaic UPS (Uninterrupted Power Supply) system and control method
CN102427266B (en) Multifunctional photovoltaic UPS (uninterruptible power supply) system and control method thereof
CN102082462B (en) Photovoltaic UPS system and control method
CN103441566A (en) System and method for supplying power cooperatively by mains supply, photovoltaic cell and energy storage battery
CN201947021U (en) Wind, light and power multi-energy power supply management control system
CN102163871B (en) Multi-power supply system and method
CN104320048A (en) Photovoltaic power generation system with energy storage function and coordinated power supply method of photovoltaic power generation system
CN202444293U (en) Grid-connected photovoltaic uninterruptible power supply system with preferred power supply
CN103825332B (en) Direct-current (DC) output system capable of effectively protecting fuel battery and reducing amount of energy storage batteries
CN106160161B (en) A kind of solar energy power source apparatus and control method
CN203368044U (en) Bidirectional ac/dc multi-power-supply multi-load safe-isolation micro electrical network system
CN104113133B (en) Intelligent photovoltaic off-network inverter system and power consumption control method thereof
CN201985605U (en) Photovoltaic power supply system
Liu et al. Multiport DC/DC Converter for stand-alone photovoltaic lighting system with battery storage
CN202798128U (en) Independent photovoltaic power supply system with self-starting function
CN103928962A (en) On-line UPS system capable of achieving energy saving by photovoltaic energy and control method thereof
CN203261105U (en) Power system of PRU communication base station
CN201904645U (en) Photovoltaic UPS system
CN102510641A (en) Composite energy storage power supply for solar LED (light-emitting diode) street lamp
CN203466613U (en) Household off-network light-storage supplementary electricity generation system compatible with multiple types of energy-storage systems
CN205453288U (en) Incessant power supply system of industrial robot that sprays paint
CN201918758U (en) Photovoltaic UPS (Uninterrupted Power Supply) system
CN202798105U (en) Wind and solar complemented intelligent control system of communication base station
CN102148526A (en) Charger
CN203747468U (en) DC output system for effectively protecting fuel battery and reducing quantity of energy storage battery

Legal Events

Date Code Title Description
C06 Publication
PB01 Publication
C10 Entry into substantive examination
SE01 Entry into force of request for substantive examination
C14 Grant of patent or utility model
GR01 Patent grant