CN100349356C - Independent electric power supply - Google Patents
Independent electric power supply Download PDFInfo
- Publication number
- CN100349356C CN100349356C CNB2004100923323A CN200410092332A CN100349356C CN 100349356 C CN100349356 C CN 100349356C CN B2004100923323 A CNB2004100923323 A CN B2004100923323A CN 200410092332 A CN200410092332 A CN 200410092332A CN 100349356 C CN100349356 C CN 100349356C
- Authority
- CN
- China
- Prior art keywords
- power supply
- voltage
- electric
- power
- storage battery
- 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.)
- Expired - Fee Related
Links
Images
Landscapes
- Charge And Discharge Circuits For Batteries Or The Like (AREA)
- Direct Current Feeding And Distribution (AREA)
- Inverter Devices (AREA)
Abstract
Provided is a separate power supply system which enables both of AC electric load and DC electric load to be used, and can prevent the damage of a power converter in case that a current over the range of specification flows or in case that input voltage is over the range of specification by an error in connection of a storage battery. A control circuit 15 supplies AC power by driving a boosting circuit 10 and an inverter bridge 11, and supplies DC by turning on a switch 13. In case that the current over the range of specification flows, or in case that the input voltage is over the range of specification, the control circuit 15 stops the boosting circuit 10 and the inverter bridge 11, and also stops the power supply by turning off the switch 13.
Description
Technical field
The present invention relates to a kind of small-scale independent electric power supply, this system can be used to charge a battery from the DC power of DC (direct current) power supply of independent solar battery for example etc., and load provides electric power with common AC (interchange) can to give common DC load.
Background technology
Solar cell or wind-driven generator are to utilize natural energy to export the DC power supply of DC power, and because it can not discharge harmful substance during output power, are considered to a kind of simple and energy of cleaning.This DC power supply will be exported DC power usually and be stored in the storage battery temporarily, and in the time need providing constant output power to electrical load, carry out power transfer.This electrical power generation system is used to drive the AC load in the area that does not have flourishing commercial power system.
Particularly, when the DC power supply is solar cell, can pass through combined solar battery module, battery module and power converter, construct the small-scale independent electric power supply of easy installation and use.
Fig. 7 shows the example of the tradition small-scale independent electric power supply with about 100W output.With reference to Fig. 7, independent electric power supply 101 comprises solar module 102, storage battery 103 and inverter unit 104 on a small scale, storage battery 103 is used to store the DC power from solar module 102 outputs, and inverter unit 104 is used for the DC power transfer from storage battery 103 outputs is become AC power.
Utilization comes operation A C load 105 from the AC power of inverter unit 104 outputs.AC socket 106 is housed on inverter unit 104, and if AC load 105 are common AC loads, this AC load 105 just can easily be connected to inverter unit 104 so, and is operated.In addition, common lead accumulator is as storage battery 103, and when storage battery 103 is depleted, can easily be replaced.
As the example of the separate unit system of combined solar battery and storage battery as mentioned above, the Japan Patent No.2000-242871 of open pending trial discloses a kind of equipment that is used for emergency, and this equipment uses solar cell and storage battery to come drive controlling plate and motor as the DC power supply.Under disaster scenario, this equipment that is used for emergency uses solar cell and the storage battery stand-by power supply as source power supply, and can provide electric power to equipment.
Utilize traditional small-scale independent electric power supply, even, also can use common AC load in the area that does not have flourishing commercial power system.
Yet traditional independent electric power supply is intended to that load provides electric power to AC, therefore can not use the DC load.
In addition, even at the structure independent electric power supply so as allow to use the DC load and the two situation of AC load under, if use DC load and AC load simultaneously, the electric current that just may flow through technical specification (specification) scope above independent electric power supply to provide electric power to load.In this case, inverter unit may suffer damage.
And when utilizing storage battery to make that independent electric power supply becomes a general-purpose system, when installation system, possible errors ground connects the storage battery of offrating.In this case, be applied to inverter unit owing to surpass the input voltage of specification ranges, inverter unit may suffer damage.
Summary of the invention
The present invention is intended to address the above problem.The purpose of this invention is to provide a kind of independent electric power supply, this system make it possible to use DC load and AC load the two, and when the electric current that flows through above specification ranges, perhaps when making that owing to storage battery connection error input voltage surpasses specification ranges, can prevent from power conversion device is caused damage.
In a word, the present invention relates to a kind of independent electric power supply.This independent electric power supply comprises: a DC power supply, export first dc voltage; The 2nd DC power supply by the charging of first dc voltage, and discharges second dc voltage; And power supply circuits, be connected to these two DC power supplys of a DC power supply and the 2nd DC power supply, so that AC power and DC power are provided.These power supply circuits comprise the AC power supply circuits, are used for second dc voltage is converted to AC voltage so that AC to be provided voltage; The DC power supply circuits are used to receive second dc voltage so that DC is provided power; And control unit, be used to control AC power supply circuits and DC power supply circuits.This independent electric power supply can simultaneously and be exported DC power and AC power respectively.
Preferably, the AC power supply circuits have first output select circuit, be used for AC power provide and stop between selecting, the DC power supply circuits have second output select circuit, be used for DC power provide and stop between selecting, and AC power and DC power can be exported simultaneously.
Preferably, control unit detects the selection mode of first output select circuit, so that control the power supply of AC power supply circuits, and detects the selection mode of second output select circuit, so that the power supply of control DC power supply circuits.
Preferably, control unit has and is used to detect the DC current detection circuit of electric current of power supply circuits of flowing through, and surpasses predetermined value in response to detected electric current, controls the power supply of AC power supply circuits and the power supply of DC power supply circuits.
Preferably, the DC power supply circuits have the 3rd output select circuit, the 3rd output select circuit be used for according to from the order of control unit DC power provide and stop between selecting.
Preferably, the 2nd DC power supply is a storage battery, and control unit detects the dc voltage of this storage battery, and surpasses predetermined value in response to the dc voltage of this storage battery, controls the power supply of AC power supply circuits and the power supply of DC power supply circuits.
Preferably, the 2nd DC power supply is a storage battery, and control unit detects the dc voltage of this storage battery, and becomes in response to the dc voltage of this storage battery and to be lower than predetermined value, controls the power supply of AC power supply circuits.
Preferably, the 2nd DC power supply is a storage battery, and control unit has switching circuit, this switching circuit be used for first dc voltage from a DC power supply to storage battery provide and stop changing.
Preferably, the 2nd DC power supply is a storage battery, and control unit detects the dc voltage of this storage battery, and becomes in response to the dc voltage of this storage battery and to be lower than predetermined value, comes the conversion of control switch circuit, so that first dc voltage is provided for this storage battery from a DC power supply.
The one DC power supply is solar cell preferably.
Therefore, major advantage of the present invention is to use AC load and DC load simultaneously.In addition, when the DC load with the AC load is connected and the electric current that surpasses the technical specification of power conversion device when flowing through, can stop power supply causes damage to power conversion device so that prevent.And when having connected the storage battery that departs from specification ranges mistakenly, can stop power supply causes damage to power conversion device or DC load so that prevent.
By the detailed description of the present invention being carried out below in conjunction with accompanying drawing, above-mentioned and other purposes of the present invention, characteristics, aspect and advantage will become clearer.
Description of drawings
Fig. 1 is the block diagram according to the independent electric power supply of first embodiment;
Fig. 2 is the flow chart of power supply control flow;
Fig. 3 is the flow chart of overcurrent protection operation control flow;
Fig. 4 is the flow chart of the control flow under the charge mode;
Fig. 5 is the flow chart of the control flow under the discharge mode;
Fig. 6 is the flow chart of overvoltage protection operation control flow;
Fig. 7 shows the structure of the independent electric power supply in the conventional art.
Embodiment
[first embodiment of the present invention]
Describe embodiments of the invention in detail now with reference to accompanying drawing.Identical or the corresponding part of the character representation of system in the accompanying drawing.
Fig. 1 is the block diagram according to independent electric power supply of the present invention.
With reference to Fig. 1, independent electric power supply 1 comprises solar module 2, storage battery 3 and electric supply installation 4, storage battery 3 storages are from the dc voltage of solar module 2 outputs, electric supply installation 4 will become AC from the DC power transfer of storage battery 3 so that AC is provided power, and also can directly provide DC power.AC load 5 and DC load 6 are connected to electric supply installation 4, and the user can utilize the AC power or the DC power that provide from electric supply installation 4 to use each load.Should be noted that and to replace solar module 2 in the independent electric power supply 1 of the present invention with wind-driven generator.
AC power supply unit 22 comprises booster circuit 10, inverter bridge (inverter bridge) 11 and switch 12, booster circuit 10 is used for the dc voltage from storage battery 3 outputs is elevated to the dc voltage of regulation, inverter bridge 11 is used for being converted to the commercial AV power of assigned frequency by the dc voltage that booster circuit 10 raises, switch 12 can AC power provide and stop between mechanically selecting.Control unit 20 comprises reverse-current protection diode 7, switch 8, DC current detector 9 and control circuit 15; reverse-current protection diode 7 is used for avoiding electric supply installation 4 to flow through reverse current when the anode of solar module 2 is connected with negative electrode is anti-phase; switch 8 be used to utilize the signal of telecommunication DC power from solar module 2 to storage battery 3 provide and stop selecting, DC current detector 9 is used to detect the DC electric current of electric supply installation 4 of flowing through.
And, control circuit 15 detects the DC current value of the DC current detector 9 of flowing through, and when the DC current value surpasses specification ranges, send stop signal, and send OFF (pass) signal so that make switch 13 not conductings so that stop booster circuit 10 and inverter bridge 11.
And control circuit 15 detects the terminal voltage of storage battery 3, and sends signal according to the magnitude of voltage of this terminal voltage, so that make switch 8 conducting or not conductings.When making switch 8 conductings, by DC power accumulators 3 chargings that provide from solar module 2.
And control circuit 15 detects the terminal voltage of storage battery 3, and when the magnitude of voltage of this terminal voltage surpasses set point, sends stop signal so that stop booster circuit 10 and inverter bridge 11, and sends OFF (pass) signal so that make switch 13 not conductings.
And; control circuit 15 detects the magnitude of voltage of the anode part of reverse current (reverse current) protection diode 7; so that monitor the dc voltage of solar module 2, and when this dc voltage value is not less than specification ranges, sends the OFF signal and make switch 8 not conductings.Although control circuit 15 detects the magnitude of voltage of the anode part of reverse-current protection diode 7 among Fig. 1, also can pass through the magnitude of voltage of the cathode portion of detection reverse-current protection diode 7, monitor the dc voltage of solar module 2.
The independent electric power supply example that now description is had Fig. 1 of about 100W output.In this example, the technical specification of solar module 2 comprises the rated value of 120W and the open circuit voltage of 21V.Storage battery 3 output DC power, and output voltage values is 21V.Booster circuit 10 is elevated to 240V with dc voltage from 12V.Inverter bridge 11 will convert AC voltage to from the dc voltage of the 240V of booster circuit 10 output, this AC voltage have effective voltage value+220V and-amplitude between the 220V, and have the frequency of 50Hz or 60Hz.
At first, will describe such a case, wherein electric supply installation 4 provides electric power for AC load 5 and DC load 6.
Be imported into electric supply installation 4 from the DC power of solar module 2 outputs, and be temporarily stored in the storage battery 3.In storage battery 3, stored sufficient DC power, and AC load 5 and DC load 6 are input to DC power the electric supply installation 4 from storage battery 3 when being connected to electric supply installation 4.When switch 12 and switch 14 conductings, control circuit 15 drives booster circuits 10 and inverter bridge 11 so that AC is provided power, and makes switch 13 conductings so that DC is provided power.So electric supply installation 4 can drive AC load 5 and DC load 6 simultaneously.
Fig. 2 is the flow chart of electric supply installation 4 power supply control flows.Control circuit 5 is controlled the power supply of DC power supply unit 21 and AC power supply unit 22 according to the conducting of switch 12 and switch 14.
With reference to Fig. 2, when start-up course in step S1, this process enters step S2, and the information of the contact condition in the switch 12 is imported into control circuit 15.Then, in step S3, whether conducting of sense switch 12.
When detecting switch 12 conductings in step S3, this process enters step S4, and control circuit 15 outputs to booster circuit 10 with drive signal.Booster circuit 10 receives drive signal, and conducting or cut-out internal switch element.The magnitude of voltage of DC power is elevated to the input voltage level of AC load 5 by booster circuit 10.Then, in step S5, control circuit 15 outputs to inverter bridge 11 with drive signal.Inverter bridge 11 receives drive signal, and with constant cycle repetition conducting and cut-out internal switch element.The DC power that raises in booster circuit 10 is converted to AC power by inverter bridge 11.The AC power of being changed is provided for AC load 5 via switch 12.When step S5 finished, this process entered step S6.
On the other hand, when detecting switch 12 not conductings in step S3, this process enters into step S40.In step S40, control circuit 15 outputs to booster circuit 10 with stop signal.Booster circuit 10 receives stop signal, and stops its driving.Then, in step S50, control circuit 15 outputs to inverter bridge 11 with stop signal.Inverter bridge 11 receives stop signal, and stops its driving.When step S50 finished, this process entered into step S6, and the situation of finishing with step S5 is identical.
In step S6, the information of the contact condition in the switch 14 is imported into control circuit 15.Then, in step S7, whether conducting of sense switch 14.
When detecting switch 14 conductings in step S7, this process enters into step S8, and control circuit 15 outputs to switch 13 with ON (opening) signal.When switch 13 receives ON signal and beginning conducting, DC power is offered DC load 6 via switch 14.When step S8 finished, this process entered into step S9, and finished.
On the other hand, when detecting switch 14 be not conducting in step S7, this process enters into step S80, and control circuit 15 outputs to switch 13 with OFF (pass) signal.In this case, because switch 13 not conductings, DC power is not provided for DC load 6.When step S80 finished, this process entered into step S9, and finished.
To describe the protection operation of electric supply installation 4 now, when the electric current that surpasses specification ranges is flowed through electric supply installation 4, will carry out this protection operation.
When connecting and drive the AC load 5 that surpasses specification ranges and DC load 6, will flow through electric current above specification ranges.
Fig. 3 is the flow chart of the overcurrent protection operation control flow in the electric supply installation 4.When the DC current value of the electric supply installation 4 of flowing through surpassed specification ranges, control circuit 15 stopped the power supply of DC power supply unit 21 and AC power supply unit 22.
With reference to Fig. 3, when the process in the start-up control circuit 15 in step S11, this process enters into step S12, and is input to the control circuit 15 from DC current detector 9 about the information of the DC current value of the electric supply installation 4 of flowing through.Then, this process enters into step S13, and whether the DC current value of the electric supply installation 4 of determining to flow through is in specification ranges.
When determining that in step S13 this DC current value is in specification ranges, this process enters into step S19, and finishes.
On the other hand, when determining that in step S13 this DC current value is not in specification ranges, this process enters into step S14.In step S14, control circuit 15 is input to booster circuit 10 with stop signal.Booster circuit 10 receives this stop signal, and stops its driving.Then, in step S15, control circuit 15 is input to inverter bridge 11 with stop signal.Inverter bridge 11 receives this stop signal, and stops its driving.Afterwards, in step S18, control circuit 15 outputs to switch 13 with the OFF signal.When step S18 finished, this process entered into step S19, and finished.
As mentioned above, when this DC current value was not in specification ranges, control circuit 15 stopped booster circuit 10 and inverter bridge 11 so that stop power supply to AC load 5, and made switch 13 not conductings so that stop power supply to DC load 6.Therefore, can prevent from electric supply installation 4 is caused damage.
Next, will the operation of independent electric power supply 1 under charge mode be described.By day, independent electric power supply 1 is mainly carried out from solar module 2 to storage battery 3 charging operations.On the other hand, at night, the independent electric power supply 1 main discharge operation of carrying out storage battery 3 is so that give DC load 6 or AC load 5 power supplies.
When the magnitude of voltage of accumulator terminal voltage VBin is equal to or less than charging recovery voltage value, switch 8 beginning conductings.When have solar radiation and with DC power when solar module 2 offers electric supply installation 4, to storage battery 3 chargings.When AC load 5 and DC load 6 are connected to electric supply installation 4 and switch 12 and switch 14 conductings, carry out the discharge of storage battery 3, and the magnitude of voltage of accumulator terminal voltage VBin reduces.When the magnitude of voltage of accumulator terminal voltage VBin reduces and becomes when being lower than discharge and suppressing magnitude of voltage, stop power supply to AC load 5.Then, when because the power supply of DC load 6 is caused the magnitude of voltage of accumulator terminal voltage VBin further to reduce and becomes when being lower than discharge and stopping magnitude of voltage, stop to provide DC power.
When the power supply that stops from 3 pairs of AC loads 5 of storage battery or DC load 6, the magnitude of voltage of accumulator terminal voltage VBin raises.When the magnitude of voltage of accumulator terminal voltage VBin surpassed discharge recovery voltage value, independent electric power supply 1 was operated under discharge mode.To describe discharge mode in detail below.
Fig. 4 is the flow chart of the control flow under the charge mode in the electric supply installation 4.Under charge mode, control circuit 15 makes switch 8 conductings.In addition, stop magnitude of voltage if the magnitude of voltage of accumulator terminal voltage VBin is lower than discharge, then control circuit 15 control AC power supply units 22 and DC power supply unit 21 are stopped power supply.
With reference to Fig. 4, when start-up course in step S21, this process enters into step S22.In step S22, determine to be lower than charging recovery voltage value by the magnitude of voltage of control circuit 15 detected accumulator terminal voltage VBin.For example, the recovery voltage value of can charging is set to 13.0V.
Be lower than charging recovery voltage value if determine the magnitude of voltage of accumulator terminal voltage VBin in step S22, then this process enters into step S23.In step S23, the ON signal is outputed to switch 8 from control circuit 15, so that make switch 8 conductings.Along with the conducting of switch 8, carry out charging from 2 pairs of storage batterys 3 of solar module.When this process completing steps S23, this process just enters into step S24.
If the magnitude of voltage of accumulator terminal voltage VBin is not less than charging recovery voltage value in step S22, then this process enters into step S29, thereby enters the flow chart of discharge mode.
In step S24, by the magnitude of voltage of control circuit 15 detection accumulator terminal voltage VBin, and whether the magnitude of voltage of definite accumulator terminal voltage VBin is lower than discharge inhibition magnitude of voltage.Suppress magnitude of voltage if the magnitude of voltage of accumulator terminal voltage VBin is lower than discharge, this process enters into step S25.On the other hand, suppress magnitude of voltage if the magnitude of voltage of accumulator terminal voltage VBin is not less than discharge, this process enters into step S29, thereby enters the flow chart of discharge mode.In step S24, for example, the inhibition magnitude of voltage that can discharge is set to 11.5V.
In step S25, control circuit 15 outputs to booster circuit 10 with stop signal.Booster circuit 10 receives stop signal, and stops its driving.Then, this process enters into step S26, and control circuit 15 outputs to inverter bridge 11 with stop signal.Inverter bridge 11 receives stop signal, and stops its driving.That is to say that the process by step S25 and step S26 stops AC power supply unit 22.Then, this process enters step S27.
In step S27, detect the magnitude of voltage of accumulator terminal voltage VBin by control circuit 15, and whether the magnitude of voltage of definite accumulator terminal voltage VBin is lower than discharge and stops magnitude of voltage.Stop magnitude of voltage if the magnitude of voltage of accumulator terminal voltage VBin is lower than discharge, this process enters into step S28.If the magnitude of voltage of accumulator terminal voltage VBin is not less than to discharge and stops magnitude of voltage in step S27, this process enters into step S29, thereby enters the flow chart of discharge mode.In step S27, for example, can discharge stop magnitude of voltage and be set to 11.0V.
In step S28, control circuit 15 output OFF signals are to switch 13.Switch 13 receives this OFF signal and stop conducting, and DC power supply unit 21 is stopped power supply.
In step S28, also carry out the control that display unit 16 is not shown from control circuit 15.The control that display unit 16 shows from control circuit 15, and the output of indication electric supply installation 4 stops and the dump energy deficiency of storage battery 3.Then, this process enters into step S29, thereby enters the flow chart of discharge mode.
The operation of independent electric power supply 1 under discharge mode will be described now.
When AC load 5 and DC load 6 were connected to electric supply installation 4 and switch 12 or switch 14 beginning conductings, storage battery 3 began discharge, and DC power is offered electric supply installation 4 from storage battery 3.
Fig. 5 is the flow chart of the control flow under the discharge mode in the electric supply installation 4.Under discharge mode, when the magnitude of voltage of accumulator terminal voltage VBin was higher than discharge recovery voltage value, control unit 15 was carried out control so that drive AC power supply unit 22 and DC power supply unit 21.When the magnitude of voltage of accumulator terminal voltage VBin was higher than charging and stops magnitude of voltage, control circuit 15 made switch 8 stop conductings, so that stop the charging to storage battery 3.
With reference to Fig. 5, when start-up course in step S31, this process enters step S33.In step S33, detect the magnitude of voltage of accumulator terminal voltage VBin, and determine whether the magnitude of voltage of this accumulator terminal voltage VBin is lower than discharge recovery voltage value.For example, the recovery voltage value of should discharging is arranged to 12.6V.
Be not less than discharge recovery voltage value if determine the magnitude of voltage of this accumulator terminal voltage VBin in step S33, then this process enters step S331.On the other hand, be lower than discharge recovery voltage value if determine the magnitude of voltage of this accumulator terminal voltage VBin in step S33, then this process enters step S39, thereby enters the flow chart of charge mode.
In step S331, whether conducting of sense switch 12.When detecting switch 12 conductings in step S331, this process enters into step S34.On the other hand, when detecting switch 12 not conductings in step S331, this process enters into the step S351 of the following stated.
In step S34, control circuit 15 outputs to booster circuit 10 with drive signal.Booster circuit 10 receives this drive signal, and is driven.Then, in step S35, control circuit 15 outputs to inverter bridge 11 with drive signal.Inverter bridge 11 receives this drive signal, and is driven.Along with the driving of booster circuit 10 and inverter bridge 11, AC power is provided for AC load 5.
Then, this process enters into step S351.In step S351, whether conducting of sense switch 14.When detecting switch 14 conductings in step S351, this process enters into step S36.On the other hand, when detecting switch 14 not conductings in step S351, this process enters into the step S37 of the following stated.
In step S36, control circuit 15 outputs to switch 13 with the ON signal.Switch 13 receives the ON signal, and the beginning conducting.Along with switch 13 beginning conductings, DC power is provided for DC load 6.When the process of step S36 was finished, this process entered into step S37.
In step S37, detect the magnitude of voltage of accumulator terminal voltage VBin by control circuit 15, and whether the magnitude of voltage of determining this accumulator terminal voltage VBin is lower than discharge and stops magnitude of voltage.Stop magnitude of voltage if the magnitude of voltage of this accumulator terminal voltage VBin is not less than discharge, then this process enters step S38.On the other hand, stop magnitude of voltage if the magnitude of voltage of this accumulator terminal voltage VBin is lower than discharge, then this process enters step S39, thereby enters the flow chart of charge mode.For example, this discharge is stopped magnitude of voltage and be arranged to 14.4V.
In step S37, also carry out the control that display unit 16 is not shown from control circuit 15.The control that display unit 16 shows from control circuit 15, and the charging fully of indication storage battery 3.
In step S38, control circuit 15 outputs to switch 8 with the OFF signal.Switch 8 receives this OFF signal, stop conducting.Along with switch 8 stop conductings, stop the charging of storage battery 3.Then, this process enters into step S39, thereby enters the flow chart of charge mode.
To describe now and connect the situation that surpasses the storage battery 3 of specification ranges.
Fig. 6 is the flow chart of overvoltage protection operation control flow in the electric supply installation 4.When the magnitude of voltage of accumulator terminal voltage VBin surpassed an overvoltage protection value, control circuit 15 stopped both power supplies of DC power supply unit 21 and AC power supply unit 22.
With reference to Fig. 6, when start-up course in step S41, this process enters into step S42, and detects accumulator terminal voltage VBin.Then, this process enters into step S43, and determines that the magnitude of voltage of this accumulator terminal voltage VBin is lower than the overvoltage protection value.For example, this overvoltage protection value is set to 15V.
When the magnitude of voltage of determining this accumulator terminal voltage VBin in step S43 was lower than the overvoltage protection value, this process entered into step S49, and finished.
On the other hand, when the magnitude of voltage of determining this accumulator terminal voltage VBin in step S43 was not less than the overvoltage protection value, this process entered into step S44, and control circuit 15 output stop signals are to booster circuit 10.Then, this process enters into step S45, and control circuit 15 sends stop signal to inverter bridge 11.Then, this process enters into step S48, and control circuit 15 sends the OFF signal to switch 13.This process enters into step S400 again, and control circuit 15 direction display unit 16 show that output stops.After this, this process enters into step S49, and finishes.
As mentioned above; when the magnitude of voltage of this accumulator terminal voltage VBin is not less than the overvoltage protection value; control circuit 15 stops booster circuit 10 and inverter bridge 11, and makes switch 13 not conductings, thereby prevents because overvoltage causes the infringement to electric supply installation 4 or DC load 6.
Though described and illustrated the present invention in detail, but should be expressly understood that, because the spirit and scope of the invention are only limited by claims, only be in order to illustrate with example rather than to be used to limit the present invention to foregoing description of the present invention and explanation.
Claims (9)
1. independent electric power supply comprises:
The one DC power supply is exported first dc voltage;
The 2nd DC power supply by described first dc voltage charging, and discharges second dc voltage; With
Electric supply installation is connected to a described DC power supply and these two DC power supplys of described the 2nd DC power supply, so that AC power and DC power are provided; Wherein
Described electric supply installation comprises
The AC electric supply installation is used for converting described second dc voltage to AC voltage so that AC to be provided voltage,
The DC electric supply installation is used to receive described second dc voltage so that DC is provided power, and
Control unit, be used to control described AC electric supply installation and described DC electric supply installation, this control unit has and is used to detect the DC current sensing means of electric current of described electric supply installation of flowing through, and surpass predetermined value in response to detected electric current, control the power supply of described AC electric supply installation and the power supply of described DC electric supply installation, and
Described independent electric power supply can simultaneously and be exported DC power and AC power respectively.
2. independent electric power supply as claimed in claim 1, wherein
Described AC electric supply installation has first output selection device, be used for AC power provide and stop between selecting,
Described DC electric supply installation has second output selection device, be used for DC power provide and stop between selecting, and
Described independent electric power supply can be exported DC power and AC power simultaneously.
3. independent electric power supply as claimed in claim 2, wherein
Described control unit detects the selection mode of described first output selection device, so that control the power supply of described AC electric supply installation, and detects the selection mode of described second output selection device, so that control the power supply of described DC electric supply installation.
4. independent electric power supply as claimed in claim 1, wherein
Described DC electric supply installation has the 3rd output selection device, the 3rd output selection device be used for according to from the indication of described control unit DC power provide and stop between selecting.
5. independent electric power supply as claimed in claim 1, wherein
Described the 2nd DC power supply is a storage battery, and
Described control unit detects the dc voltage of described storage battery, and surpasses predetermined value in response to the dc voltage of described storage battery, controls the power supply of described AC electric supply installation and the power supply of described DC electric supply installation.
6. independent electric power supply as claimed in claim 1, wherein
Described the 2nd DC power supply is a storage battery, and
Described control unit detects the dc voltage of described storage battery, and becomes in response to the dc voltage of described storage battery and to be lower than predetermined value, controls the power supply of described AC electric supply installation.
7. independent electric power supply as claimed in claim 1, wherein
Described the 2nd DC power supply is a storage battery, and
Described control unit has switching device, this switching device be used for to carry out from a described DC power supply to described storage battery described first dc voltage provide and stop conversion.
8. independent electric power supply as claimed in claim 7, wherein
Described the 2nd DC power supply is a storage battery, and
Described control unit detects the dc voltage of described storage battery, and becomes in response to the dc voltage of described storage battery and to be lower than predetermined value, controls the conversion of described switching device, so that described first dc voltage is provided for described storage battery from a described DC power supply.
9. independent electric power supply as claimed in claim 1, wherein
A described DC power supply is a solar cell.
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2003376975A JP2005143217A (en) | 2003-11-06 | 2003-11-06 | Separate power supply system |
| JP376975/2003 | 2003-11-06 | ||
| JP376975/03 | 2003-11-06 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1614854A CN1614854A (en) | 2005-05-11 |
| CN100349356C true CN100349356C (en) | 2007-11-14 |
Family
ID=34687860
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB2004100923323A Expired - Fee Related CN100349356C (en) | 2003-11-06 | 2004-11-08 | Independent electric power supply |
Country Status (2)
| Country | Link |
|---|---|
| JP (1) | JP2005143217A (en) |
| CN (1) | CN100349356C (en) |
Families Citing this family (43)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100461608C (en) * | 2005-10-11 | 2009-02-11 | 精模电子科技（深圳）有限公司 | Battery pack system capable of providing ac voltage |
| US10693415B2 (en) | 2007-12-05 | 2020-06-23 | Solaredge Technologies Ltd. | Testing of a photovoltaic panel |
| US11881814B2 (en) | 2005-12-05 | 2024-01-23 | Solaredge Technologies Ltd. | Testing of a photovoltaic panel |
| CN101371146B (en) * | 2006-01-12 | 2011-09-14 | 日产自动车株式会社 | Voltage detection device and voltage detection method |
| JP2007221872A (en) * | 2006-02-15 | 2007-08-30 | Ricoh Co Ltd | Charging circuit of secondary battery, its power supply switching method and power supply |
| JP4688725B2 (en) * | 2006-05-09 | 2011-05-25 | 三洋電機株式会社 | Power supply |
| US11855231B2 (en) | 2006-12-06 | 2023-12-26 | Solaredge Technologies Ltd. | Distributed power harvesting systems using DC power sources |
| US8013472B2 (en) | 2006-12-06 | 2011-09-06 | Solaredge, Ltd. | Method for distributed power harvesting using DC power sources |
| US11735910B2 (en) | 2006-12-06 | 2023-08-22 | Solaredge Technologies Ltd. | Distributed power system using direct current power sources |
| US11687112B2 (en) | 2006-12-06 | 2023-06-27 | Solaredge Technologies Ltd. | Distributed power harvesting systems using DC power sources |
| US11728768B2 (en) | 2006-12-06 | 2023-08-15 | Solaredge Technologies Ltd. | Pairing of components in a direct current distributed power generation system |
| US8947194B2 (en) | 2009-05-26 | 2015-02-03 | Solaredge Technologies Ltd. | Theft detection and prevention in a power generation system |
| US8473250B2 (en) | 2006-12-06 | 2013-06-25 | Solaredge, Ltd. | Monitoring of distributed power harvesting systems using DC power sources |
| US11569659B2 (en) | 2006-12-06 | 2023-01-31 | Solaredge Technologies Ltd. | Distributed power harvesting systems using DC power sources |
| US8319483B2 (en) | 2007-08-06 | 2012-11-27 | Solaredge Technologies Ltd. | Digital average input current control in power converter |
| US8319471B2 (en) | 2006-12-06 | 2012-11-27 | Solaredge, Ltd. | Battery power delivery module |
| US9088178B2 (en) | 2006-12-06 | 2015-07-21 | Solaredge Technologies Ltd | Distributed power harvesting systems using DC power sources |
| US8384243B2 (en) | 2007-12-04 | 2013-02-26 | Solaredge Technologies Ltd. | Distributed power harvesting systems using DC power sources |
| US8816535B2 (en) | 2007-10-10 | 2014-08-26 | Solaredge Technologies, Ltd. | System and method for protection during inverter shutdown in distributed power installations |
| US11309832B2 (en) | 2006-12-06 | 2022-04-19 | Solaredge Technologies Ltd. | Distributed power harvesting systems using DC power sources |
| US11296650B2 (en) | 2006-12-06 | 2022-04-05 | Solaredge Technologies Ltd. | System and method for protection during inverter shutdown in distributed power installations |
| US8963369B2 (en) | 2007-12-04 | 2015-02-24 | Solaredge Technologies Ltd. | Distributed power harvesting systems using DC power sources |
| US8030801B2 (en) * | 2007-10-31 | 2011-10-04 | Illinois Tool Works Inc. | Multi-voltage power supply for a universal airplane ground support equipment cart |
| WO2009072076A2 (en) | 2007-12-05 | 2009-06-11 | Solaredge Technologies Ltd. | Current sensing on a mosfet |
| US11264947B2 (en) | 2007-12-05 | 2022-03-01 | Solaredge Technologies Ltd. | Testing of a photovoltaic panel |
| EP2232663B2 (en) | 2007-12-05 | 2021-05-26 | Solaredge Technologies Ltd. | Safety mechanisms, wake up and shutdown methods in distributed power installations |
| EP3719949A1 (en) | 2008-05-05 | 2020-10-07 | Solaredge Technologies Ltd. | Direct current power combiner |
| JP5381361B2 (en) * | 2009-06-11 | 2014-01-08 | 株式会社豊田自動織機 | Inverter device |
| FR2961323B1 (en) * | 2010-06-14 | 2012-07-13 | Schneider Electric Ind Sas | POWER SUPPLY DEVICE AND METHOD FOR WIRELESS COMMUNICATION SYSTEM AND SENSOR ASSEMBLY COMPRISING SUCH A DEVICE. |
| GB2485527B (en) | 2010-11-09 | 2012-12-19 | Solaredge Technologies Ltd | Arc detection and prevention in a power generation system |
| US10673222B2 (en) | 2010-11-09 | 2020-06-02 | Solaredge Technologies Ltd. | Arc detection and prevention in a power generation system |
| US10673229B2 (en) | 2010-11-09 | 2020-06-02 | Solaredge Technologies Ltd. | Arc detection and prevention in a power generation system |
| GB2483317B (en) | 2011-01-12 | 2012-08-22 | Solaredge Technologies Ltd | Serially connected inverters |
| ITTO20110762A1 (en) * | 2011-08-11 | 2013-02-12 | Sisvel Technology Srl | SYSTEM OF GENERATION AND USE (FOR ACCUMULATION AND DELIVERY) OF ELECTRICITY PRODUCED BY POWER SOURCES OF POWER CURRENT CONTINUES, AND ITS RELATED SYSTEM MANAGEMENT METHOD |
| GB2498365A (en) | 2012-01-11 | 2013-07-17 | Solaredge Technologies Ltd | Photovoltaic module |
| US9853565B2 (en) | 2012-01-30 | 2017-12-26 | Solaredge Technologies Ltd. | Maximized power in a photovoltaic distributed power system |
| GB2498791A (en) | 2012-01-30 | 2013-07-31 | Solaredge Technologies Ltd | Photovoltaic panel circuitry |
| JP6082886B2 (en) * | 2013-02-22 | 2017-02-22 | 株式会社高砂製作所 | Power adjustment apparatus and power adjustment method |
| US9548619B2 (en) | 2013-03-14 | 2017-01-17 | Solaredge Technologies Ltd. | Method and apparatus for storing and depleting energy |
| FR3025607B1 (en) | 2014-09-10 | 2016-09-16 | Continental Automotive France | METHOD FOR DETECTING A CONNECTION FAULT OF AN AUXILIARY BATTERY |
| KR101725671B1 (en) * | 2015-01-12 | 2017-04-11 | 주식회사 엘지화학 | Overvoltage protection circuit, controlling method of the same and battery pack |
| US11018623B2 (en) | 2016-04-05 | 2021-05-25 | Solaredge Technologies Ltd. | Safety switch for photovoltaic systems |
| US11177663B2 (en) | 2016-04-05 | 2021-11-16 | Solaredge Technologies Ltd. | Chain of power devices |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS62145446U (en) * | 1986-02-28 | 1987-09-14 | ||
| CN1037305C (en) * | 1991-12-16 | 1998-02-04 | 日本电气株式会社 | Charging device for a portable telephone |
| CN2289338Y (en) * | 1996-10-29 | 1998-08-26 | 青海省新能源研究所 | Portable ac and dc dual-purpose solar power supply device |
-
2003
- 2003-11-06 JP JP2003376975A patent/JP2005143217A/en active Pending
-
2004
- 2004-11-08 CN CNB2004100923323A patent/CN100349356C/en not_active Expired - Fee Related
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS62145446U (en) * | 1986-02-28 | 1987-09-14 | ||
| CN1037305C (en) * | 1991-12-16 | 1998-02-04 | 日本电气株式会社 | Charging device for a portable telephone |
| CN2289338Y (en) * | 1996-10-29 | 1998-08-26 | 青海省新能源研究所 | Portable ac and dc dual-purpose solar power supply device |
Also Published As
| Publication number | Publication date |
|---|---|
| JP2005143217A (en) | 2005-06-02 |
| CN1614854A (en) | 2005-05-11 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN100349356C (en) | Independent electric power supply | |
| CN102549878B (en) | Switching circuit, control apparatus, and power generating system | |
| US8362648B2 (en) | Electric power supply system | |
| US6795322B2 (en) | Power supply with uninterruptible function | |
| US8008889B2 (en) | Charging circuit for secondary battery, power supply switching method in charging circuit for secondary battery, and power supply unit | |
| JP5959561B2 (en) | Multiple battery DC microgrid charging / discharging system connected in series | |
| US9252599B2 (en) | Method for controlling energy management system | |
| KR101256077B1 (en) | Power control system and controlling method thereof | |
| US10906428B2 (en) | Power supply system with hydrogen fuel cell | |
| JP5569249B2 (en) | Uninterruptible power system | |
| KR101979232B1 (en) | Hybrid Energy storage system for charging and discharging Solor photovoltaic energy | |
| JP2002315228A (en) | Power supply apparatus | |
| JP2001177995A (en) | Hybrid power supply system | |
| JP2005027430A (en) | Power conversion system | |
| JPH0965582A (en) | Power supply system utilizing solar cell | |
| JP2002315231A (en) | Uninterruptible power source equipment | |
| US7230353B2 (en) | Charging circuit in uninterruptible power supply system | |
| JP2003208913A (en) | Power controller, power generating system and control method of power controller | |
| JP2013038052A (en) | Power conversion apparatus | |
| CN201311448Y (en) | No-load voltage detection circuit for solar cell panel | |
| US20050007071A1 (en) | Circuit arrangement for an autonomous power supply system, and a method for its operation | |
| JPH10201130A (en) | Power generation installation making use of solar energy | |
| JP6923121B2 (en) | Power supply device | |
| JP3193350B2 (en) | Power supply | |
| US11233403B2 (en) | Grid interconnection system |
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 | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20071114 Termination date: 20141108 |
|
| EXPY | Termination of patent right or utility model |