CN110474316A - DC micro power grid system and its output voltage control method, device - Google Patents
DC micro power grid system and its output voltage control method, device Download PDFInfo
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- CN110474316A CN110474316A CN201910748740.6A CN201910748740A CN110474316A CN 110474316 A CN110474316 A CN 110474316A CN 201910748740 A CN201910748740 A CN 201910748740A CN 110474316 A CN110474316 A CN 110474316A
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- 238000004146 energy storage Methods 0.000 claims description 48
- 238000001514 detection method Methods 0.000 claims description 29
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- 238000006243 chemical reaction Methods 0.000 abstract description 19
- 230000008901 benefit Effects 0.000 abstract description 7
- 238000005070 sampling Methods 0.000 description 13
- 238000010586 diagram Methods 0.000 description 8
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Classifications
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J1/00—Circuit arrangements for dc mains or dc distribution networks
- H02J1/10—Parallel operation of dc sources
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J1/00—Circuit arrangements for dc mains or dc distribution networks
- H02J1/14—Balancing the load in a network
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M7/00—Conversion of ac power input into dc power output; Conversion of dc power input into ac power output
- H02M7/02—Conversion of ac power input into dc power output without possibility of reversal
- H02M7/04—Conversion of ac power input into dc power output without possibility of reversal by static converters
- H02M7/12—Conversion of ac power input into dc power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode
- H02M7/21—Conversion of ac power input into dc power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal
- H02M7/217—Conversion of ac power input into dc power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only
- H02M7/219—Conversion of ac power input into dc power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only in a bridge configuration
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Abstract
This application involves a kind of DC micro power grid system and its output voltage control methods, device, corresponding Regulation Control signal is sent by controller the output voltage of rectification circuit is adjusted, the first DC voltage that user's needs can be exported in DC micro power grid system between the first output end and second output terminal of rectification circuit can equally export the second DC voltage of user's needs between second output terminal and third output end.DC micro power grid system can be when not using DC voltage conversion module through the above scheme, different size of DC voltage is exported according to user demand be embodied as the electric appliance of different capacity size be powered, failure is easy to happen because using excessive DC voltage conversion module so as to avoid DC micro power grid system, it simultaneously effective avoids converting DC voltage and energy loss occurring, has the advantages that functional reliability is strong.
Description
Technical field
This application involves power supply technique fields, more particularly to a kind of DC micro power grid system and its output voltage control side
Method, device.
Background technique
With clean reproducible energy development and utilization gradually deeply, dissolve photovoltaic energy, wind energy nearby in load center
Direct-current grid also gradually develops.Direct-flow electricity utilization apparatus in direct-current grid is many kinds of, according to the power one of electrical equipment
As be divided into high-power electric appliance, middle power amplifier and low power electric appliance, wherein high-power electric appliance mainly uses 600V high voltage direct current
Pressure, middle power amplifier mainly use 300V DC voltage, and low power electric appliance mainly uses 48V DC voltage.
The generally high direct voltage of DC micro power grid system output, and it is straight needed for middle power amplifier or low power electric appliance
Flowing low pressure is converted from high direct voltage, and therefore, direct-current grid needs to match various DC voltage conversion modules, i.e. DC-
DC module.More DC voltage conversion module will increase the design difficulty of direct-current grid, while increase direct-current grid
A possibility that breaking down, and lower DC voltage needs to carry out multistage conversion in order to obtain, be easy to cause the damage of electric energy
It loses.Therefore, traditional DC micro power grid system has the shortcomings that functional reliability is poor.
Summary of the invention
Based on this, it is necessary to for the problem of traditional DC micro power grid system functional reliability difference, provide a kind of direct current
Micro-grid system and its output voltage control method, device.
A kind of output voltage control method of DC micro power grid system, which comprises obtain DC micro power grid system
The first DC voltage, first output end and institute of first DC voltage for the rectification circuit of the DC micro power grid system
State the output voltage between the second output terminal of rectification circuit；When first DC voltage is unsatisfactory for the first predetermined voltage threshold
When range, Xiang Suoshu rectification circuit sends the first Regulation Control signal, and the first Regulation Control signal is described whole for controlling
Current circuit is by first DC voltage regulation to meeting the first predetermined voltage threshold range；Obtain the direct-current grid
Second DC voltage of system, second DC voltage are the third output end of the second output terminal and the rectification circuit
Between output voltage；When second DC voltage is unsatisfactory for the second predetermined voltage threshold range, to the rectification
Circuit sends the second Regulation Control signal, and the second Regulation Control signal is straight by described second for controlling the rectification circuit
Galvanic electricity pressure is adjusted to meeting the second predetermined voltage threshold range；Wherein, the third direct current of the DC micro power grid system
Pressure be the sum of first DC voltage and second DC voltage, the third DC voltage be first output end with
Voltage between the third output end.
In one embodiment, after first DC voltage for obtaining DC micro power grid system, further includes: when described
When first DC voltage meets the first predetermined voltage threshold range, carry out the acquisition DC micro power grid system second is straight
The step of galvanic electricity is pressed.
In one embodiment, after the step of second DC voltage for obtaining the DC micro power grid system, also
It include: to return to the acquisition direct-current grid when second DC voltage meets the second predetermined voltage threshold range
The step of first DC voltage of system.
A kind of output voltage-operated device of DC micro power grid system, described device includes: the first acquisition module, for obtaining
The first DC voltage of DC micro power grid system is taken, first DC voltage is the rectification circuit of the DC micro power grid system
The first output end and the rectification circuit second output terminal between output voltage；First analysis module, for when described
When first DC voltage is unsatisfactory for the first predetermined voltage threshold range, Xiang Suoshu rectification circuit sends the first Regulation Control signal,
The first Regulation Control signal is for controlling the rectification circuit for first DC voltage regulation to meeting described first
Predetermined voltage threshold range；Second obtains module, for obtaining the second DC voltage of the DC micro power grid system, described the
Output voltage of two DC voltages between the second output terminal and the third output end of the rectification circuit；Second analysis mould
Block is used for when first DC voltage meets the first predetermined voltage threshold range, according to the DC micro power grid system
Second DC voltage is analyzed with the second predetermined voltage threshold range, second DC voltage be the second output terminal with
Output voltage between the third output end of the rectification circuit.
A kind of DC micro power grid system, comprising: voltage detecting circuit, controller and rectification circuit, the rectification circuit are used
AC network outside connection, the rectification circuit connect the controller, and the voltage detecting circuit connects the rectification
Circuit and the controller, the rectification circuit are used to being converted to the alternating current that the AC network exports into direct current and defeated
Out, the voltage detecting circuit is used to detect the first DC voltage of the rectification circuit and the second DC voltage and is sent to institute
Controller is stated, the controller is used to carry out output voltage control to the rectification circuit according to above-mentioned method.
In one embodiment, DC micro power grid system further includes electrical equipment, and each electrical equipment is separately connected institute
State any two port in the first output end, the second output terminal and the third output end.
In one embodiment, the rectification circuit includes rectifier, energy storage device C1 and energy storage device C2, the rectification
The positive output end of device connects one end of the energy storage device C1 and first output end of the common end as the rectification circuit, institute
The reference output end for stating rectifier connects the other end of the energy storage device C1 and the first end of the energy storage device C2, and public
The second output terminal as the rectification circuit is held, the inverse output terminal of the rectifier connects the second of the energy storage device C2
End and third output end of the common end as the rectification circuit.
In one embodiment, the rectifier includes: inductance La, inductance Lb, inductance Lc, inductance Ld, switching device
Sa1, switching device Sa2, switching device Sa3, switching device Sa4, switching device Sb1, switching device Sb2, switching device Sb3,
Switching device Sb4, switching device Sc1, switching device Sc2, switching device Sc3, switching device Sc4, switching device Sd1 and two
Pole pipe, each switching device diode in parallel, and the yin of the corresponding diode of input terminal connection of each switching device respectively
Pole, the output end of each switching device connect the anode of corresponding diode, the switching device Sa1, the switching device Sa2, institute
State switching device Sa3, the switching device Sa4, the switching device Sb1, the switching device Sb2, the switching device
Sb3, the switching device Sb4, the switching device Sc1, the switching device Sc2, the switching device Sc3, the switch
The control terminal of device Sc4 and the switching device Sd1 are all connected with the controller, and one end of the inductance La connects the exchange
Power grid, the other end of the inductance La connect the output end of the switching device Sa1, the switching device Sa3 input terminal and
The input terminal of the switching device Sa4, the output end of the switching device Sa3 connect the output end of the switching device Sa2, institute
The input terminal for stating switching device Sa2 connects one end of the inductance Ld, and the other end of the inductance Ld connects the energy storage device
The other end of C1, the input terminal of the switching device Sa1 connect one end of the energy storage device C1, the switching device Sa4's
Output end connects the output end of the switching device Sd1 and the other end of the energy storage device C2, and the switching device Sd1's is defeated
Enter the other end that end connects the inductance Ld；One end of the inductance Lb connects the AC network, and the inductance Lb's is another
The input of the output end, the input terminal and the switching device Sb4 of the switching device Sb3 of the end connection switching device Sb1
End, the output end of the switching device Sb3 connect the output end of the switching device Sb2, the input terminal of the switching device Sb2
One end of the inductance Ld is connected, the input terminal of the switching device Sb1 connects one end of the energy storage device C1, the switch
The output end of device Sb4 connects the output end of the switching device Sa4；One end of the inductance Lc connects the AC network,
The other end of the inductance Lc connect the output end of the switching device Sc1, the switching device Sc3 input terminal and described open
The input terminal of device Sc4 is closed, the output end of the switching device Sc3 connects the output end of the switching device Sc2, the switch
The input terminal of device Sc2 connects one end of the inductance Ld, and the input terminal of the switching device Sc1 connects the energy storage device C1
One end, the output end of the switching device Sc4 connects the output end of the switching device Sb4.
In one embodiment, the voltage detecting circuit includes: the first detection circuit and the second detection circuit, and described
One detection circuit and second detection circuit are separately connected the controller, and first detection circuit accesses the rectified current
First output end on road and the second output terminal of the rectification circuit, for detecting the first DC voltage, the second detection electricity
The third output end of the second output terminal and the rectification circuit is accessed on road, for detecting the second DC voltage.
In one embodiment, the AC network is single phase ac power grid or three-phase AC grid.
Above-mentioned DC micro power grid system and its output voltage control method, device send corresponding pressure regulation by controller
The output voltage of rectification circuit is adjusted in control signal, the first output end of rectification circuit and the in DC micro power grid system
The first DC voltage that user's needs can be exported between two output ends, equally can between second output terminal and third output end
Export the second DC voltage that user needs.When straight between the first output port and third output port using DC circuit
When galvanic electricity pressure is powered, the high voltage direct current that size is the sum of the first DC voltage and second DC voltage can be obtained, from
It and is that high-power electric appliance is powered.DC micro power grid system can not use DC voltage conversion module through the above scheme
When, different size of DC voltage is exported according to user demand it is embodied as the electric appliance of different capacity size and be powered, to keeps away
DC micro power grid system is exempted from and has been easy to happen failure because using excessive DC voltage conversion module, has simultaneously effective avoided pair
DC voltage is converted and energy loss occurs, and has the advantages that functional reliability is strong.
Detailed description of the invention
Fig. 1 is the output voltage control method flow diagram of DC micro power grid system in an embodiment；
Fig. 2 is DC micro power grid system structural schematic diagram in an embodiment；
Fig. 3 is rectifier circuit structure schematic diagram in an embodiment；
Fig. 4 is the output voltage control method flow diagram of DC micro power grid system in another embodiment；
Fig. 5 is the output voltage control method flow diagram of DC micro power grid system in another embodiment；
Fig. 6 is the output voltage-operated device structural schematic diagram of DC micro power grid system in an embodiment；
Fig. 7 is direct-current grid structural schematic diagram in another embodiment.
Specific embodiment
The application in order to facilitate understanding is described more fully the application below with reference to relevant drawings.In attached drawing
Give the preferred embodiment of the application.But the application can realize in many different forms, however it is not limited to herein
Described embodiment.On the contrary, purpose of providing these embodiments is keeps the understanding to disclosure of this application more saturating
It is thorough comprehensive.
Referring to Fig. 1, a kind of output voltage control method of DC micro power grid system, including step S100, S200, step
S300 and step S400.
Step S100 obtains the first DC voltage of DC micro power grid system.
Specifically, the first DC voltage is the first output end and rectification circuit of the rectification circuit of DC micro power grid system
Output voltage between second output terminal.The mode for obtaining the first DC voltage is not uniquely, in one embodiment, to lead to
It crosses corresponding voltage detecting circuit and carries out DC voltage detection, to obtain the first output end and second output terminal of rectification circuit
Between the first DC voltage size.Voltage detecting circuit is to be able to carry out voltage sample to obtain sampled signal, so as to
To obtain the circuit of relevant voltage size according to sampled signal.By voltage detecting circuit in real time to the first output of rectification circuit
Voltage sample is carried out between end and second output terminal, and the sampled signal that sampling obtains is sent to controller, and controller can
The first DC voltage is obtained according to sampled signal.In another embodiment, can also be sample circuit according to sampled signal, directly
It connects to obtain the first DC voltage and then the first DC voltage is sent to controller.
It should be pointed out that in one embodiment, voltage detecting circuit is real to the sampling operation of the first DC voltage
Shi Jinhang's, in order to be learnt in time when the first DC voltage is unsatisfactory for corresponding predetermined voltage threshold range.Into one
Step ground, in one embodiment, voltage detecting circuit include the first detection circuit and the second detection circuit.Wherein, the first detection
Circuit accesses the first output end of rectification circuit and the second output terminal of rectification circuit, for detecting the first DC voltage, and
The first DC voltage that will test is sent to controller and is further analyzed processing.
Step S200 sends the to rectification circuit when the first DC voltage is unsatisfactory for the first predetermined voltage threshold range
One Regulation Control signal.
Specifically, the first Regulation Control signal is pre- to meeting first by the first DC voltage regulation for controlling rectification circuit
If voltage threshold range.First predetermined voltage threshold range is to the extent permitted by the error, it is defeated that first to be accessed in rectification circuit
The DC voltage range value of the electrical equipment anticipated output of outlet and second output terminal.The size of first predetermined voltage threshold range
Be not it is unique, for accessing the first output end electrical equipment different from second output terminal of rectification circuit, corresponding the
One predetermined voltage threshold range can not also be identical.For example, in one embodiment, the first direct current of electrical equipment anticipated output
Voltage swing is 48V, and can be correspondingly arranged the first predetermined voltage threshold range at this time is [45V, 50V], that is, is greater than or equal to straight
It flows 46V and is less than or equal to direct current 50V.Direct-current grid includes rectification circuit and controller, when controller obtains DC micro-electric
It, can be by the first direct current when the first DC voltage in the rectification circuit of net system between the first output end and second output terminal
Pressure is compared and analyzed with the first predetermined voltage threshold range, i.e., by the first obtained DC voltage and the first predetermined voltage threshold
Range compares and analyzes, and judges whether the first DC voltage is located within the scope of the first predetermined voltage threshold.
When the first DC voltage is unsatisfactory for the first predetermined voltage threshold range, controller can send first to rectification circuit
Regulation Control signal, by the first DC voltage regulation exported between the first output end and second output terminal of rectification circuit to completely
The first predetermined voltage threshold range of foot.After rectification circuit receives the first Regulation Control signal, according to Regulation Control signal
First DC voltage is adjusted, while the sampling operation of the first DC voltage of voltage detecting circuit real-time perfoming, rectified current
The first obtained DC voltage and the first predetermined voltage threshold range are in real time analyzed in road, until the first DC voltage meets
After first predetermined voltage threshold range, controller stops the transmission of the first Regulation Control signal.
Further, in one embodiment, the specific structure of rectification circuit is as shown in Fig. 2-Fig. 3, the first Regulation Control
Signal equally includes voltage up control signal and voltage down control signals, and the voltage up control signal sent by controller or decompression control
Signal controls the service time of switching device Sa4 in rectifier respectively, to realize the first direct current exported to rectification circuit
The adjusting of pressure operates.
Step S300 obtains the second DC voltage of DC micro power grid system.
Specifically, output voltage of second DC voltage between second output terminal and the third output end of rectification circuit.
The rectification circuit of DC micro power grid system includes three output ports, can be defeated between the first output port and second output terminal mouth
A certain size the first DC voltage out, can export a certain size second between second output terminal mouth and third output port
DC voltage, and the third DC voltage size exported between the first output port and third output port is the first DC voltage
The sum of with the second DC voltage.Meanwhile first the size of DC voltage and the second DC voltage can be according to set by user
Different predetermined voltage threshold ranges are adjusted, so that the DC voltage size of final output meets user demand, and then realize
The electrical equipment of a variety of different voltages grades is powered.It should be pointed out that in one embodiment, the of rectification circuit
One output end is positive output end, and second output terminal is to indicate the first energy storage in rectification circuit with reference to output end with reference to output end
Intermediate potential point between element and the second energy-storage travelling wave tube is the port that the equipment for different voltages grade accesses, and
Third output end is then the inverse output terminal of rectification circuit.
Likewise, the mode for obtaining the second DC voltage is not uniquely, in one embodiment, to pass through corresponding electricity
Detection circuit is pressed to carry out DC voltage detection, to obtain second between the second output terminal of rectification circuit and third output end
The size of DC voltage.Voltage detecting circuit is to be able to carry out voltage sample to obtain sampled signal, so as to according to sampling
Signal obtains the circuit of relevant voltage size.It is defeated to the second output terminal of rectification circuit and third in real time by voltage detecting circuit
Voltage sample is carried out between outlet, and the sampled signal that sampling obtains is sent to controller, and controller can be believed according to sampling
Number obtain the second DC voltage.In another embodiment, it can also be that sample circuit according to sampled signal, directly obtains second
DC voltage and then the second DC voltage is sent to controller.
Step S400 sends the to rectification circuit when the second DC voltage is unsatisfactory for the second predetermined voltage threshold range
Two Regulation Control signals.
Specifically, the second Regulation Control signal is pre- to meeting second by the second DC voltage regulation for controlling rectification circuit
If voltage threshold range.When controller, which is analyzed to obtain the second DC voltage, is unsatisfactory for the second predetermined voltage threshold range,
Illustrate that the DC voltage at this time between the second output terminal of rectification circuit and third output end cannot be guaranteed the second output of access
Hold and worked normally the electrical equipment between third output end, need at this time by controller to the output voltage of rectification circuit into
Row adjusts operation.Second Regulation Control signal includes voltage up control signal and voltage down control signals, i.e., controls rectified power respectively
Increase or reduce the control signal of the second DC voltage of output.It is default straight according to the second DC voltage exported at this time and second
Galvanic electricity presses the relationship of threshold range, sends corresponding Regulation Control signal to rectification circuit, so that the second of rectification circuit
DC voltage increases or reduces.Meanwhile during increasing or reducing the second DC voltage, controller is in real time according to detecting
To second output terminal and third output end between voltage analyzed with the second predetermined DC voltage threshold range.Work as output
The second DC voltage when meeting default second voltage threshold range, controller will stop adjusting operation accordingly.
It should be pointed out that the concrete type of rectification circuit is not uniquely, as long as can be in Regulation Control signal
Under effect, the rectification circuit of different size of second DC voltage and the first DC voltage is exported.For example, implementing at one
In example, Fig. 2-Fig. 3 is please referred to, rectification circuit includes that stream device, energy storage device C1 and energy storage device C2, rectifier specifically include inductance
La, inductance Lb, inductance Lc, inductance Ld, switching device Sa1, switching device Sa2, switching device Sa3, switching device Sa4, switch
Device Sb1, switching device Sb2, switching device Sb3, switching device Sb4, switching device Sc1, switching device Sc2, switching device
Sc3, switching device Sc4, switching device Sd1 and diode, each switching device diode in parallel, and each switch respectively
The input terminal of device connects the cathode of corresponding diode, and the output end of each switching device connects the anode of corresponding diode.
By taking A phase as an example, A phase inductance corresponds to open certain time by control switch device Sa4, turn off later for La
Switching device Sa4 opens switching device Sb2 and switching device Sc2, then A phase inductance La accumulation of energy electric current is by switching device Sa1's
Diode (i.e. the diode in parallel with switching device Sa1), energy storage device C1, switching device Sb2 and switching device Sc2, switch
The diode of device Sb3 and switching device Sc3 flow back to power grid, and state is charged to energy storage device C1 at this time, the first DC voltage
V2 voltage is controlled, and the time that switching device Sa4 is opened determines the voltage value of V2.Therefore, it can be sent by controller
Regulation Control signal carry out service time of control switch device Sa4, realize that the control to the first DC voltage V2 operates.Control
Device control switch device Sd1 opens certain time, turns off switching device Sd1 later, then inductance Ld accumulation of energy electric current passes through accumulator
The diode of part C2, the diode of the diode of switching device Sa4 and switching device Sb4 and switching device Sc4 return to power grid, open
The time that pass device Sd1 is opened determines the voltage value of the second DC voltage V3.Believed by the Regulation Control that controller is sent
Number carry out the service time of control switch device Sd1, realizes that the control to the second DC voltage V3 operates.
Voltage of the third DC voltage between the first output end and third output end, and be the first DC voltage and second
The sum of DC voltage.When controller is adjusted the second DC voltage according to the second pressure regulation signal, obtain meeting second default
After second DC voltage of voltage threshold range size, control is straight by meet the first predetermined voltage threshold range simultaneously first
Galvanic electricity pressure and the second DC voltage for meeting the second predetermined voltage threshold range are transported to corresponding electrical equipment, that is, are correspondingly connected with
Electrical equipment between the first output end and second output terminal of rectification circuit, second output terminal and third output end.Simultaneously
Bigger DC voltage can also be exported between the first output end and third output end of rectification circuit, is larger to voltage requirements
Electrical equipment be powered.First DC voltage, the second DC voltage and third DC voltage general DC busbar positive and negative anodes
(the positive output end and inverse output terminal bus of rectifier i.e. in rectification circuit), so that rectification circuit can export simultaneously
Two smaller DC voltages and a larger DC voltage, and output DC voltage can also be further realized by controller
Adjusting operation.When being powered operation using the DC micro power grid system in the embodiment, DC voltage modulus of conversion is not needed
Block can be realized as a variety of different size of direct voltage outputs, to work for a variety of different types of electrical equipments.
Referring to Fig. 4, in one embodiment, after step S100, this method further include: when the first DC voltage meets
When the first predetermined voltage threshold range, the operation for obtaining the second DC voltage of DC micro power grid system is executed.
Specifically, output voltage of second DC voltage between second output terminal and the third output end of rectification circuit.
When controller is analyzed according to the first DC voltage with corresponding first predetermined voltage threshold range, the first DC voltage is obtained
After within the scope of the first predetermined voltage threshold, controller will second output terminal to rectification circuit and third output end it
Between the second DC voltage analyzed, judgement at this time the second DC voltage whether equally meet corresponding second predeterminated voltage threshold
It is worth range.It is similar with the first predetermined voltage threshold range, the second predetermined voltage threshold range be to the extent permitted by the error,
Access the expected DC voltage range value of electrical equipment between the second output terminal and third output end of rectification circuit.By to
The analytical judgment of one DC voltage and the second DC voltage, to guarantee between the first output end and second output terminal, is second defeated
The DC voltage for meeting corresponding electrical equipment demand can be exported between outlet and third output end, without using direct current
Voltage transformation module carries out voltage conversion operation.
It should be pointed out that the first predetermined voltage threshold range and the second predetermined voltage threshold range can be identical threshold
It is worth range, is also possible to different voltage threshold range.For example, in one embodiment, the first predetermined voltage threshold range
It is identical as the second predetermined voltage threshold range, by controller to the first DC voltage of rectification circuit and the second DC voltage into
After row is adjusted, so that the size of the first DC voltage is direct current 300V, the second DC voltage size is direct current 300V.Then at this time
Direct current 600V size will be received by being connected to the electrical equipment between the first output end of rectification circuit and third output end
Voltage can use DC micro power grid system to be powered operation for high power electric appliance at this time, while pass through the first output electricity
Pressure and the second output voltage can also maintain the operation of multiple middle power amplifiers simultaneously.
Referring to Fig. 5, in one embodiment, after step S400, this method further include: when the second DC voltage meets
When the second predetermined voltage threshold range, the operation for obtaining the first DC voltage of DC micro power grid system is returned.According to second
When DC voltage and default second voltage threshold range are analyzed, it there is also the second DC voltage and meet the second predeterminated voltage
The situation of threshold range.It does not need controller then at this time further to regulate and control the second DC voltage, therefore, controller only needs
Will at this time corresponding first DC voltage, the second DC voltage and third direct voltage output to corresponding electrical equipment, and
And persistently carry out the detection operation of the first DC voltage.
The output voltage control method of above-mentioned DC micro power grid system sends corresponding Regulation Control signal by controller
The output voltage of rectification circuit is adjusted, the first output end and second output terminal of rectification circuit in DC micro power grid system
Between can export user needs the first DC voltage, user can be equally exported between second output terminal and third output end
The second DC voltage needed.When using DC circuit the first output port and third output port between DC voltage into
When row power supply, the high voltage direct current that size is the sum of the first DC voltage and second DC voltage can be obtained, to be big function
Rate electric appliance is powered.Through the above scheme DC micro power grid system can when not using DC voltage conversion module, according to
User demand, which exports different size of DC voltage and is embodied as the electric appliance of different capacity size, to be powered, so as to avoid direct current
Micro-grid system is easy to happen failure because using excessive DC voltage conversion module, simultaneously effective avoids to DC voltage
It is converted and energy loss occurs, have the advantages that functional reliability is strong.
Referring to Fig. 6, a kind of output voltage-operated device of DC micro power grid system, comprising: the first acquisition module 100,
First analysis module 200, second obtains module 300 and the second analysis module 400.
First acquisition module 100 is used to obtain the first DC voltage of DC micro power grid system.
Specifically, the first DC voltage is the first output end and rectification circuit of the rectification circuit of DC micro power grid system
Output voltage between second output terminal.The mode for obtaining the first DC voltage is not uniquely, in one embodiment, to lead to
It crosses corresponding voltage detecting circuit and carries out DC voltage detection, to obtain the first output end and second output terminal of rectification circuit
Between the first DC voltage size.Voltage detecting circuit is to be able to carry out voltage sample to obtain sampled signal, so as to
To obtain the circuit of relevant voltage size according to sampled signal.By voltage detecting circuit in real time to the first output of rectification circuit
Voltage sample is carried out between end and second output terminal, and the sampled signal that sampling obtains is sent to controller, and controller can
The first DC voltage is obtained according to sampled signal.In another embodiment, can also be sample circuit according to sampled signal, directly
It connects to obtain the first DC voltage and then the first DC voltage is sent to controller.
First analysis module 200 is used for when the first DC voltage is unsatisfactory for the first predetermined voltage threshold range, to rectification
Circuit sends the first Regulation Control signal.
Specifically, the first Regulation Control signal is pre- to meeting first by the first DC voltage regulation for controlling rectification circuit
If voltage threshold range.First predetermined voltage threshold range is to the extent permitted by the error, it is defeated that first to be accessed in rectification circuit
The DC voltage range value of the electrical equipment anticipated output of outlet and second output terminal.The size of first predetermined voltage threshold range
Be not it is unique, for accessing the first output end electrical equipment different from second output terminal of rectification circuit, corresponding the
One predetermined voltage threshold range can not also be identical.For example, in one embodiment, the first direct current of electrical equipment anticipated output
Voltage swing is 48V, and can be correspondingly arranged the first predetermined voltage threshold range at this time is [45V, 50V], that is, is greater than or equal to straight
It flows 46V and is less than or equal to direct current 50V.Direct-current grid includes rectification circuit and controller, when controller obtains DC micro-electric
It, can be by the first direct current when the first DC voltage in the rectification circuit of net system between the first output end and second output terminal
Pressure is compared and analyzed with the first predetermined voltage threshold range, i.e., by the first obtained DC voltage and the first predetermined voltage threshold
Range compares and analyzes, and judges whether the first DC voltage is located within the scope of the first predetermined voltage threshold.
When the first DC voltage is unsatisfactory for the first predetermined voltage threshold range, controller can send first to rectification circuit
Regulation Control signal, by the first DC voltage regulation exported between the first output end and second output terminal of rectification circuit to completely
The first predetermined voltage threshold range of foot.After rectification circuit receives the first Regulation Control signal, according to Regulation Control signal
First DC voltage is adjusted, while the sampling operation of the first DC voltage of voltage detecting circuit real-time perfoming, rectified current
The first obtained DC voltage and the first predetermined voltage threshold range are in real time analyzed in road, until the first DC voltage meets
After first predetermined voltage threshold range, controller stops the transmission of the first Regulation Control signal.
Second acquisition module 300 is used to obtain the second DC voltage of DC micro power grid system.
Likewise, the mode for obtaining the second DC voltage is not uniquely, in one embodiment, to pass through corresponding electricity
Detection circuit is pressed to carry out DC voltage detection, to obtain second between the second output terminal of rectification circuit and third output end
The size of DC voltage.Voltage detecting circuit is to be able to carry out voltage sample to obtain sampled signal, so as to according to sampling
Signal obtains the circuit of relevant voltage size.It is defeated to the second output terminal of rectification circuit and third in real time by voltage detecting circuit
Voltage sample is carried out between outlet, and the sampled signal that sampling obtains is sent to controller, and controller can be believed according to sampling
Number obtain the second DC voltage.In another embodiment, it can also be that sample circuit according to sampled signal, directly obtains second
DC voltage and then the second DC voltage is sent to controller.
Second analysis module 400 is used for when the second DC voltage is unsatisfactory for the second predetermined voltage threshold range, to rectification
Circuit sends the second Regulation Control signal.
Specifically, the second Regulation Control signal is pre- to meeting second by the second DC voltage regulation for controlling rectification circuit
If voltage threshold range.When controller, which is analyzed to obtain the second DC voltage, is unsatisfactory for the second predetermined voltage threshold range,
Illustrate that the DC voltage at this time between the second output terminal of rectification circuit and third output end cannot be guaranteed the second output of access
Hold and worked normally the electrical equipment between third output end, need at this time by controller to the output voltage of rectification circuit into
Row adjusts operation.Second Regulation Control signal includes voltage up control signal and voltage down control signals, i.e., controls rectified power respectively
Increase or reduce the control signal of the second DC voltage of output.It is default straight according to the second DC voltage exported at this time and second
Galvanic electricity presses the relationship of threshold range, sends corresponding Regulation Control signal to rectification circuit, so that the second of rectification circuit
DC voltage increases or reduces.Meanwhile during increasing or reducing the second DC voltage, controller is in real time according to detecting
To second output terminal and third output end between voltage analyzed with the second predetermined DC voltage threshold range.Work as output
The second DC voltage when meeting default second voltage threshold range, controller will stop adjusting operation accordingly.
In one embodiment, the first analysis module 200 is also used to when the first DC voltage meets the first predeterminated voltage
When threshold range, the operation for obtaining the second DC voltage of DC micro power grid system is executed.Concrete operations and above method part
Corresponding embodiment is consistent, and details are not described herein.
In one embodiment, the second analysis module 400 is also used to meet the second predeterminated voltage threshold when the second DC voltage
When being worth range, the operation for obtaining the first DC voltage of DC micro power grid system is returned.Concrete operations and above method part pair
The embodiment answered is consistent, and details are not described herein.
The output voltage-operated device of above-mentioned DC micro power grid system sends corresponding Regulation Control signal by controller
The output voltage of rectification circuit is adjusted, the first output end and second output terminal of rectification circuit in DC micro power grid system
Between can export user needs the first DC voltage, user can be equally exported between second output terminal and third output end
The second DC voltage needed.When using DC circuit the first output port and third output port between DC voltage into
When row power supply, the high voltage direct current that size is the sum of the first DC voltage and second DC voltage can be obtained, to be big function
Rate electric appliance is powered.Through the above scheme DC micro power grid system can when not using DC voltage conversion module, according to
User demand, which exports different size of DC voltage and is embodied as the electric appliance of different capacity size, to be powered, so as to avoid direct current
Micro-grid system is easy to happen failure because using excessive DC voltage conversion module, simultaneously effective avoids to DC voltage
It is converted and energy loss occurs, have the advantages that functional reliability is strong.
Referring to Fig. 7, a kind of DC micro power grid system, comprising: voltage detecting circuit 50, controller 10 and rectification circuit
30, rectification circuit 30 is used to connect external AC network 20, and rectification circuit 30 connects controller 10, and voltage detecting circuit 50 connects
Connect rectification circuit 30 and controller 10, rectification circuit 30 is used to be converted in the alternating current that AC network 30 exports direct current and defeated
Out, voltage detecting circuit 50 is used to detect the first DC voltage of rectification circuit 30 and the second DC voltage and is sent to controller
10, controller 10 is used to carry out output voltage control to rectification circuit 30 according to above-mentioned method.
Specifically, the first predetermined voltage threshold range is to the extent permitted by the error, to access first in rectification circuit 30
The DC voltage range value of the electrical equipment anticipated output of output end and second output terminal.First predetermined voltage threshold range it is big
Small is not uniquely, for accessing the first output end electrical equipment different from second output terminal of rectification circuit 30, to correspond to
The first predetermined voltage threshold range can not also be identical.Direct-current grid includes rectification circuit 30 and controller 10, works as control
Device 10 obtains the first DC voltage in the rectification circuit 30 of DC micro power grid system between the first output end and second output terminal
When, the first DC voltage and the first predetermined voltage threshold range can be compared and analyzed, i.e., the first direct current that will be obtained
Pressure is compared and analyzed with the first predetermined voltage threshold range, judges whether the first DC voltage is located at the first predetermined voltage threshold
Within the scope of.
When controller 10 is analyzed according to the first DC voltage with corresponding first predetermined voltage threshold range, is obtained
After one DC voltage is located within the scope of the first predetermined voltage threshold, controller 10 will be to the second output terminal of rectification circuit 30
The second DC voltage between third output end is analyzed, and judges whether the second DC voltage equally meets corresponding at this time
Second predetermined voltage threshold range.Similar with the first predetermined voltage threshold range, the second predetermined voltage threshold range is accidentally
In the range of difference allows, the expected direct current of electrical equipment between the second output terminal and third output end of rectification circuit 30 is accessed
Press value range.By the analytical judgment to the first DC voltage and the second DC voltage, to guarantee the first output end and second
The DC voltage for meeting corresponding electrical equipment demand can be exported between output end, between second output terminal and third output end,
Without carrying out voltage conversion operation using DC voltage conversion module.
When controller 10, which is analyzed to obtain the second DC voltage, is unsatisfactory for the second predetermined voltage threshold range, illustrate this
When rectification circuit 30 second output terminal and third output end between DC voltage cannot be guaranteed access second output terminal with
Electrical equipment between third output end works normally, need at this time by controller 10 to the output voltage of rectification circuit 30 into
Row adjusts operation.Second Regulation Control signal includes voltage up control signal and voltage down control signals, i.e., controls rectified power respectively
Increase or reduce the control signal of the second DC voltage of output.It is default straight according to the second DC voltage exported at this time and second
Galvanic electricity presses the relationship of threshold range, sends corresponding Regulation Control signal to rectification circuit 30, so that rectification circuit 30
Second DC voltage increases or reduces.Meanwhile during increasing or reducing the second DC voltage, the real-time basis of controller 10
Voltage between the obtained second output terminal of detection and third output end is analyzed with the second predetermined DC voltage threshold range.
When the second DC voltage of output meets default second voltage threshold range, controller 10 will stop adjusting behaviour accordingly
Make.
It should be pointed out that the type of controller 10 is not that uniquely, in one embodiment, controller 10 is micro-control
Unit (Microcontroller Unit, MCU) processed.MCU is also known as one chip microcomputer or single-chip microcontroller, is central processing
The frequency of device and specification do appropriate reduction, and by the perimeter interfaces such as memory, counter, USB, A/D conversion, UART, PLC, DMA,
Even LCD driving circuit all integrates the computer for forming chip-scale on a single chip, does different groups for different applications
Close control.Using MCU as control unit, realizes the control operation of output voltage in DC micro power grid system, have and be easy in fact
The now advantage highly reliable with control.
Referring to Fig. 2, in one embodiment, DC micro power grid system further includes electrical equipment 40, each electrical equipment 40
It is separately connected any two port in the first output end, second output terminal and third output end.
Specifically, the first DC voltage, the second DC voltage and third DC voltage general DC busbar positive and negative anodes are (i.e. whole
The positive output end and inverse output terminal bus of rectifier in current circuit 30) so that rectification circuit 30 can export simultaneously
Two smaller DC voltages and a larger DC voltage, and output direct current can also be further realized by controller 10
The adjusting of pressure operates.When being powered operation using the DC micro power grid system in the embodiment, DC voltage conversion is not needed
Module can be realized as a variety of different size of direct voltage outputs, to carry out work for a variety of different types of electrical equipments 40
Make, such as the high-tension apparatus of the sum of diagram two DC voltages of access V1, and is respectively connected to the first DC voltage V2 and second
The low-voltage equipment 1 and low-voltage equipment 2 of DC voltage V3.
Referring to Fig. 2, in one embodiment, rectification circuit 30 includes rectifier 31, energy storage device C1 and energy storage device
C2, first output of the one end and common end of the positive output end connection energy storage device C1 of rectifier 31 as rectification circuit 30
End, the other end of the reference output end connection energy storage device C1 of rectifier 31 and the first end of energy storage device C2, and common end is made
For the second output terminal of rectification circuit 30, the second end and common end work of the inverse output terminal connection energy storage device C2 of rectifier 31
For the third output end of rectification circuit 30.
Specifically, rectification circuit 30 includes rectifier 31 and energy storage device, and rectifier 31 is converted to the alternating current of input
Direct current electricity output, and it is stored in energy storage device, when electrical equipment 40 is needed using direct current, directly pass through energy storage device
To obtain corresponding direct current.Also, it in the present embodiment, is accessed between the positive output end of rectifier 31 and reference output end
Energy storage device C1 is equivalent to a reversed output with reference to output end at this time for storing the direct current of the first DC voltage size
End.Access energy storage device C2 is for storing the second DC voltage size between the inverse output terminal and reference output end of rectifier 31
Direct current, be equivalent to positive output end with reference to output end at this time.
It should be pointed out that the type of energy storage device and when be not it is unique, in one embodiment, energy storage device C1 and
Energy storage device C2 is capacitor.Realize that the direct current after exporting AC rectification stores by capacitor, and when access
After corresponding electrical equipment 40, is worked using electric equipment 40 electric discharge of electrical equipment 40, have the advantages that operation ease is strong.
Referring to Fig. 3, in one embodiment, rectifier 31 includes: inductance La, inductance Lb, inductance Lc, inductance Ld, opens
Close device Sa1, switching device Sa2, switching device Sa3, switching device Sa4, switching device Sb1, switching device Sb2, derailing switch
Part Sb3, switching device Sb4, switching device Sc1, switching device Sc2, switching device Sc3, switching device Sc4, switching device Sd1
And diode, each switching device distinguishes a diode in parallel, and the input terminal of each switching device connects corresponding diode
Cathode, the output end of each switching device connect the anode of corresponding diode, switching device Sa1, switching device Sa2, switching device
Sa3, switching device Sa4, switching device Sb1, switching device Sb2, switching device Sb3, switching device Sb4, switching device Sc1,
Switching device Sc2, switching device Sc3, switching device Sc4 and switching device Sd1 control terminal be all connected with controller 10, inductance La
One end connect AC network 20, the input of the output end, switching device Sa3 of the other end connection switch device Sa1 of inductance La
The input terminal at end and switching device Sa4, the output end of the output end connection switch device Sa2 of switching device Sa3, switching device
One end of the input terminal connection inductance Ld of Sa2, the other end of the other end connection energy storage device C1 of inductance Ld, switching device Sa1
Input terminal connection energy storage device C1 one end, the output end of the output end connection switch device Sd1 of switching device Sa4 and energy storage
The other end of device C2, the other end of the input terminal connection inductance Ld of switching device Sd1；One end of inductance Lb connects AC network
The output end of other end connection switch device Sb1 of 20, inductance Lb, the input terminal of switching device Sb3 and switching device Sb4 it is defeated
Enter end, the input terminal of the output end of the output end connection switch device Sb2 of switching device Sb3, switching device Sb2 connects inductance Ld
One end, switching device Sb1 input terminal connection energy storage device C1 one end, the output end connection switch device of switching device Sb4
The output end of part Sa4；One end of inductance Lc connects AC network 20, the output of the other end connection switch device Sc1 of inductance Lc
It holds, the input terminal of the input terminal of switching device Sc3 and switching device Sc4, the output end connection switch device of switching device Sc3
The output end of Sc2, one end of the input terminal connection inductance Ld of switching device Sc2, the input terminal of switching device Sc1 connect accumulator
One end of part C1, the output end of the output end connection switch device Sb4 of switching device Sc4.
Under the rectifier circuit structure, by taking A phase as an example, the controller of DC micro power grid system obtains rectification circuit first
The first DC voltage, i.e. the voltage value at the both ends energy storage device C1, when the first DC voltage is unsatisfactory for predetermined voltage threshold range
When (including the first DC voltage less than in the first predetermined voltage threshold range lower limit value and the first DC voltage to be greater than first pre-
If two kinds of situations of upper limit value in voltage threshold range), controller sends unlatching/closing control to the switching device Sa4 of rectifier
Signal processed carries out the adjusting of the first DC voltage by the turn-on time of control switch device Sa4.When the first DC voltage is less than
When lower limit value, illustrate that the first DC voltage is smaller at this time, needs to send the to the switching device Sa4 of rectification circuit by controller
One Regulation Control signal increases the turn-on time of switching device Sa4, so that the first DC voltage regulation be preset to meeting first
Voltage threshold range.When the first DC voltage be greater than upper limit value when, illustrate that the first DC voltage is excessive at this time, at this time controller to
The switching device Sa4 of rectification circuit sends the first Regulation Control signal, reduces the turn-on time of switching device Sa4, thus by the
One DC voltage regulation to meet the first predetermined voltage threshold range.Likewise, when detect that the second DC voltage is unsatisfactory for the
Two predetermined voltage threshold value ranges send the second Regulation Control letter to the switching device Sd1 of rectification circuit using similar method
Number, the turn-on time of regulating switch device Sd1 can be thus achieved, and details are not described herein.
Specifically, by taking A phase as an example, A phase inductance corresponds to inductance La, opens certain time by control switch device Sa4,
Switching device Sa4 is turned off later, opens switching device Sb2 and switching device Sc2, then A phase inductance La accumulation of energy electric current is by switch
Diode (i.e. the diode in parallel with switching device Sa1), energy storage device C1, switching device Sb2 and the switching device of device Sa1
The diode of Sc2, switching device Sb3 and switching device Sc3 flow back to power grid, and state is charged to energy storage device C1 at this time, and first
DC voltage V2 voltage is controlled, and the time that switching device Sa4 is opened determines the voltage value of V2.Therefore, control can be passed through
The Regulation Control signal that device 10 processed is sent carrys out the service time of control switch device Sa4, realizes the control to the first DC voltage V2
System operation.10 control switch device Sd1 of controller opens certain time, turns off switching device Sd1 later, then inductance Ld accumulation of energy electricity
Stream passes through two poles of energy storage device C2, the diode of the diode of switching device Sa4 and switching device Sb4 and switching device Sc4
Pipe returns to power grid, and the time that switching device Sd1 is opened determines the voltage value of the second DC voltage V3.Sent out by controller 10
The Regulation Control signal sent comes the service time of control switch device Sd1, realizes that the control to the second DC voltage V3 operates.
It should be pointed out that the type of switching device is not uniquely, in one embodiment, above-mentioned switching device is equal
For transistor (Bipolar Junction Transistor, BJT), MOS transistor (Metal Oxide
Semiconductor, MOS) or insulated gate bipolar transistor (Insulated Gate Bipolar Transistor,
IGBT)。
Further, in one embodiment, each switching device is NMOS tube, corresponding diode each at this time
Anode and cathode is connected with source electrode with grid respectively.Using NMOS tube as switching device, the grid of NMOS tube (is controlled
End) pulse control signal that receives is when being high level signal, NMOS transistor conduction, when received pulse control signal is low level
When signal, NMOS tube cut-off therefore can be by the time of the control terminal input high level of control switch device Sa4, realization pair
The adjusting of first DC voltage V2 operates.
In one embodiment, voltage detecting circuit 50 includes: the first detection circuit and the second detection circuit, the first detection
Circuit and the second detection circuit are separately connected controller, and the first detection circuit accesses the first output end and rectified current of rectification circuit
The second output terminal on road, for detecting the first DC voltage, the second detection circuit accesses the of second output terminal and rectification circuit
Three output ends, for detecting the second DC voltage.
Specifically, voltage detecting circuit 50 is and is able to carry out voltage sample to obtain sampled signal, adopts so as to basis
Sample signal obtains the circuit of relevant voltage size.In one embodiment, DC micro power grid system is additionally provided with voltage detecting electricity
Progress voltage between the first output end and second output terminal of rectification circuit 30 is in real time adopted by voltage detecting circuit 50 in road 50
Sample, to carrying out voltage sample between second output terminal and third output end, and the sampled signal that sampling obtains is sent to control
Device 10, controller 10 can obtain the size of the first DC voltage and the second DC voltage according to sampled signal.In another reality
Apply in example, can also be sample circuit according to sampled signal, directly obtain the first DC voltage the second DC voltage and then
First DC voltage and the second DC voltage are sent to controller 10.It should be pointed out that in one embodiment, voltage inspection
Slowdown monitoring circuit is real-time perfoming to the sampling operation of the first DC voltage and the second DC voltage, in order to when the first DC voltage
The second DC voltage of meeting can be learnt in time when being unsatisfactory for corresponding predetermined voltage threshold range.
In one embodiment, AC network 20 is single phase ac power grid or three-phase AC grid.Specifically, access rectification
The alternating current of device 31 can be single-phase alternating current and be also possible to three-phase alternating current, i.e., corresponding AC network 20 can be blow-up
Galvanic electricity net or three-phase AC grid can be carried out the adjusting of output DC voltage by identical control program, do not needed
DC converting module and export different size of direct current be electrical equipment 40 be powered.
Above-mentioned DC micro power grid system sends corresponding Regulation Control signal to the output electricity of rectification circuit by controller
Pressure is adjusted, and can export user between the first output end and second output terminal of rectification circuit in DC micro power grid system needs
The first DC voltage wanted can equally export the second direct current of user's needs between second output terminal and third output end
Pressure.When the DC voltage between the first output port and third output port using DC circuit is powered, can obtain
It is the high voltage direct current of the sum of the first DC voltage and second DC voltage to size, to be powered for high-power electric appliance.
DC micro power grid system can export different when not using DC voltage conversion module according to user demand through the above scheme
The electric appliance that the DC voltage of size is embodied as different capacity size is powered, so as to avoid DC micro power grid system because using
Excessive DC voltage conversion module and be easy to happen failure, simultaneously effective avoid converting DC voltage and electricity occurring
The loss of energy has the advantages that functional reliability is strong.
Each technical characteristic of embodiment described above can be combined arbitrarily, for simplicity of description, not to above-mentioned reality
It applies all possible combination of each technical characteristic in example to be all described, as long as however, the combination of these technical characteristics is not deposited
In contradiction, all should be considered as described in this specification.
The several embodiments of the application above described embodiment only expresses, the description thereof is more specific and detailed, but simultaneously
The limitation to claim therefore cannot be interpreted as.It should be pointed out that coming for those of ordinary skill in the art
It says, without departing from the concept of this application, various modifications and improvements can be made, these belong to the protection of the application
Range.Therefore, the scope of protection shall be subject to the appended claims for the application patent.
Claims (10)
1. a kind of output voltage control method of DC micro power grid system, which is characterized in that the described method includes:
The first DC voltage of DC micro power grid system is obtained, first DC voltage is the whole of the DC micro power grid system
Output voltage between first output end of current circuit and the second output terminal of the rectification circuit；
When first DC voltage is unsatisfactory for the first predetermined voltage threshold range, Xiang Suoshu rectification circuit sends the first pressure regulation
Signal is controlled, the first Regulation Control signal is for controlling the rectification circuit for first DC voltage regulation to satisfaction
The first predetermined voltage threshold range；
The second DC voltage of the DC micro power grid system is obtained, second DC voltage is the second output terminal and institute
State the output voltage between the third output end of rectification circuit；
When second DC voltage is unsatisfactory for the second predetermined voltage threshold range, Xiang Suoshu rectification circuit sends second
Regulation Control signal, the second Regulation Control signal arrive second DC voltage regulation for controlling the rectification circuit
Meet the second predetermined voltage threshold range；
Wherein, the third DC voltage of the DC micro power grid system is first DC voltage and second DC voltage
The sum of, voltage of the third DC voltage between first output end and the third output end.
2. output voltage control method according to claim 1, which is characterized in that the acquisition DC micro power grid system
After first DC voltage, further includes:
When first DC voltage meets the first predetermined voltage threshold range, the acquisition direct-current grid system is carried out
The step of second DC voltage of system.
3. output voltage control method according to claim 1, which is characterized in that described to obtain the direct-current grid system
After the step of second DC voltage of system, further includes:
When second DC voltage meets the second predetermined voltage threshold range, the acquisition direct-current grid system is returned
The step of first DC voltage of system.
4. a kind of output voltage-operated device of DC micro power grid system, which is characterized in that described device includes:
First obtains module, and for obtaining the first DC voltage of DC micro power grid system, first DC voltage is described
Output voltage between first output end of the rectification circuit of DC micro power grid system and the second output terminal of the rectification circuit；
First analysis module, for when first DC voltage is unsatisfactory for the first predetermined voltage threshold range, to described whole
Current circuit sends the first Regulation Control signal, and the first Regulation Control signal is for controlling the rectification circuit for described first
DC voltage regulation is to meeting the first predetermined voltage threshold range；
Second obtains module, and for obtaining the second DC voltage of the DC micro power grid system, second DC voltage is
Output voltage between the second output terminal and the third output end of the rectification circuit；
Second analysis module is used for when first DC voltage meets the first predetermined voltage threshold range, according to described straight
Second DC voltage of stream micro-grid system is analyzed with the second predetermined voltage threshold range, and second DC voltage is institute
State the output voltage between second output terminal and the third output end of the rectification circuit.
5. a kind of DC micro power grid system characterized by comprising voltage detecting circuit, controller and rectification circuit, it is described whole
Current circuit is used to connect external AC network, and the rectification circuit connects the controller, the voltage detecting circuit connection
The rectification circuit and the controller,
The rectification circuit is for being converted to direct current for the alternating current that the AC network exports and exporting, the voltage detecting
Circuit is used to detect the first DC voltage of the rectification circuit and the second DC voltage and is sent to the controller, the control
Device processed carries out output voltage control to the rectification circuit for method according to claim 1-3.
6. DC micro power grid system according to claim 5, which is characterized in that it further include electrical equipment, each electricity consumption
Equipment is separately connected any two port in first output end, the second output terminal and the third output end.
7. DC micro power grid system according to claim 5, which is characterized in that the rectification circuit includes rectifier, storage
Energy device C1 and energy storage device C2, the positive output end of the rectifier connect one end of the energy storage device C1 and common end and make
For the first output end of the rectification circuit, the reference output end of the rectifier connect the energy storage device C1 the other end and
The first end of the energy storage device C2, and second output terminal of the common end as the rectification circuit, the rectifier it is reversed
Output end connects the second end of the energy storage device C2 and third output end of the common end as the rectification circuit.
8. DC micro power grid system according to claim 7, which is characterized in that the rectifier includes: inductance La, inductance
Lb, inductance Lc, inductance Ld, switching device Sa1, switching device Sa2, switching device Sa3, switching device Sa4, switching device Sb1,
Switching device Sb2, switching device Sb3, switching device Sb4, switching device Sc1, switching device Sc2, switching device Sc3, switch
Device Sc4, switching device Sd1 and diode, each switching device in parallel diode respectively, and each switching device
Input terminal connects the cathode of corresponding diode, and the output end of each switching device connects the anode of corresponding diode,
The switching device Sa1, the switching device Sa2, the switching device Sa3, the switching device Sa4, the switch
It is device Sb1, the switching device Sb2, the switching device Sb3, the switching device Sb4, the switching device Sc1, described
Switching device Sc2, the switching device Sc3, the switching device Sc4 and the switching device Sd1 control terminal be all connected with institute
Controller is stated, one end of the inductance La connects the AC network, and the other end of the inductance La connects the switching device
The input terminal of the output end of Sa1, the input terminal of the switching device Sa3 and the switching device Sa4, the switching device Sa3
Output end connect the output end of the switching device Sa2, the input terminal of the switching device Sa2 connects the one of the inductance Ld
End, the other end of the inductance Ld connect the other end of the energy storage device C1, and the input terminal of the switching device Sa1 connects institute
State one end of energy storage device C1, the output end of the switching device Sa4 connect the switching device Sd1 output end and the storage
The other end of energy device C2, the input terminal of the switching device Sd1 connect the other end of the inductance Ld；The one of the inductance Lb
End connects the AC network, and the other end of the inductance Lb connects the output end of the switching device Sb1, the switching device
The output end of the input terminal of the input terminal of Sb3 and the switching device Sb4, the switching device Sb3 connects the switching device
The output end of Sb2, the input terminal of the switching device Sb2 connect one end of the inductance Ld, the input of the switching device Sb1
End connects one end of the energy storage device C1, and the output end of the switching device Sb4 connects the output of the switching device Sa4
End；One end of the inductance Lc connects the AC network, and the other end of the inductance Lc connects the defeated of the switching device Sc1
The input terminal of outlet, the input terminal of the switching device Sc3 and the switching device Sc4, the output end of the switching device Sc3
The output end of the switching device Sc2 is connected, the input terminal of the switching device Sc2 connects one end of the inductance Ld, described
The input terminal of switching device Sc1 connects one end of the energy storage device C1, opens described in the output end connection of the switching device Sc4
Close the output end of device Sb4.
9. DC micro power grid system according to claim 5, which is characterized in that the voltage detecting circuit includes: first
Detection circuit and the second detection circuit, first detection circuit and second detection circuit are separately connected the controller,
First detection circuit accesses the first output end of the rectification circuit and the second output terminal of the rectification circuit, for examining
The first DC voltage is surveyed, second detection circuit accesses the third output end of the second output terminal and the rectification circuit,
For detecting the second DC voltage.
10. DC micro power grid system according to claim 5, which is characterized in that the AC network is single-phase alternating current
Net or three-phase AC grid.
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Citations (8)
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| CN101438487A (en) * | 2004-11-10 | 2009-05-20 | 亚历山大·莫斯托夫 | Method and device for transforming and regulating a voltage signal |
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