CN106356836A - Non-communication-interconnection direct current microgrid off-grid energy balance autonomous control method and device - Google Patents
Non-communication-interconnection direct current microgrid off-grid energy balance autonomous control method and device Download PDFInfo
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- CN106356836A CN106356836A CN201610850243.3A CN201610850243A CN106356836A CN 106356836 A CN106356836 A CN 106356836A CN 201610850243 A CN201610850243 A CN 201610850243A CN 106356836 A CN106356836 A CN 106356836A
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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
- H02J1/14—Balancing the load in a network
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P80/00—Climate change mitigation technologies for sector-wide applications
- Y02P80/10—Efficient use of energy, e.g. using compressed air or pressurized fluid as energy carrier
- Y02P80/14—District level solutions, i.e. local energy networks
Abstract
The invention relates to a non-communication-interconnection direct current microgrid off-grid energy balance autonomous control method and device. When mutual communication cannot be carried out in a direct current microgrid, the own charged states of an energy storage device and active power output of an energy storage DC/DC converter are acquired, then, direct current bus voltage is correspondingly regulated according to different charged states of the energy storage device so as to enable the direct current bus voltage to be stably output, and meanwhile, the own output of each distributed type power converter in the microgrid is automatically regulated according to the variation condition of the direct current bus voltage. The control method provided by the invention can restrain active power fluctuation in off-grid operation of a direct current microgrid system so as to realize energy balance in the off-grid state of the whole direct current microgrid, is particularly suitable for the conditions of no communication interconnection among various converters and even no centralized control by a background controller and can improve the reliability of off-grid operation of the direct current microgrid system, lower the investment cost of the direct current microgrid and shorten the program realization period.
Description
Technical field
The present invention relates to no communication interconnects direct-current grid off-network energy balance autonomous control method and device, belong to distribution
Formula generating direct-current grid field.
Background technology
Direct-current grid eliminates substantial amounts of converting means than exchange micro-capacitance sensor, and system cost substantially reduces, if will be straight
Stream micro-capacitance sensor is applied in distribution system, can make to be output as that galvanic distributed power source participates directly in family and enterprise uses
Electronic equipment, increase the utilization ratio of distributed energy, have preferable application prospect.
As shown in figure 1, it is a kind of topological structure of typical direct-current grid, including dc bus, on dc bus
It is connected with dc/dc current transformer, this current transformer is connected with energy storage device, such as: energy-storage battery, because this dc/dc current transformer is used for
It is connected with energy storage device, so, this current transformer is referred to as energy storage dc/dc current transformer；And, this direct-current grid also includes being distributed
Formula power supply, by corresponding distributed power source current transformer, such as dc/dc current transformer or distributed power source dc/ac current transformer, with
Dc bus is attached.
There is not the complex controls such as frequency, phase place and reactive power in direct-current grid, can conveniently access direct current property
Micro battery and DC load.Each distributed electrical source distribution dispersion in direct-current grid, distance is different, therefore direct-current grid
System capacity management of balance difficulty is than larger.In the Coordinated Control Scheme of direct-current grid, during using centralized Control, need each
Writing to each other between controller, whole system has very strong dependency to control section and communication line, when appearance communication event
During barrier, that is, micro-capacitance sensor, under off-grid operation, cannot be carried out between the various pieces in direct-current grid communicating, such as energy storage device
All cannot realize communicating and the power supplys such as other DC loads and photovoltaic module between, then, on the dc bus in micro-capacitance sensor
Voltage just cannot keep balancing, and self-reparability difficulty is big, and reliability substantially reduces.
Content of the invention
It is an object of the invention to provide one kind no communicates interconnection direct-current grid off-network energy balance autonomous control method, use
To solve the problems, such as that in the micro-capacitance sensor when cannot mutually communicate, dc bus cannot effectively keep balancing.Present invention simultaneously provides one
Plant no communication interconnection direct-current grid off-network energy balance automatic control device.
For achieving the above object, the solution of the present invention include one kind no communicate interconnection the direct-current grid off-network energy balance from
Main control method, first, the active power output of the soc of detection energy storage device or terminal voltage and energy storage dc/dc current transformer；
Then, adjust the voltage that one end for connecting dc bus of energy storage dc/dc current transformer exports according to below equation, make straight
In the stable normal interval in a setting of stream busbar voltage u:
U=un+ k*p+c,
Wherein, unFor DC bus-bar voltage rated value；K is energy storage dc/dc current transformer output voltage adjustment factor, with energy storage
The soc of device or terminal voltage are related；P is that energy storage dc/dc current transformer active power exports；C is that energy storage dc/dc current transformer adds
Voltage-regulation constant is related to the soc of energy storage device or terminal voltage；Meanwhile, each distributed power source current transformer in micro-capacitance sensor
According to the situation of change of DC bus-bar voltage, adjust automatically itself is exerted oneself.
When the soc of energy storage device or terminal voltage are made up of the upper normality threshold setting and lower normality threshold positioned at one
When in interval,The described normal interval setting is as [uml, umh], umlFor setting
Low threshold when normally running for the dc bus, umhHigh threshold when dc bus for setting normally runs, pmaxFor energy storage
The maximum active power output of dc/dc current transformer.
When the soc of energy storage device or terminal voltage are more than the upper normality threshold setting, The described normal interval setting is as [uml, umh], umlWhen dc bus for setting normally runs
Low threshold, umhHigh threshold when dc bus for setting normally runs, umaxFor the higher limit of described DC bus-bar voltage, umax
＞ umh, pmaxMaximum active power output for energy storage dc/dc current transformer.
When the soc of energy storage device or terminal voltage are less than the lower normality threshold setting, The described normal interval setting is as [uml, umh], umlWhen dc bus for setting normally runs
Low threshold, umhHigh threshold when dc bus for setting normally runs, uminFor the lower limit of DC bus-bar voltage, uml＞
umin, pmaxMaximum active power output for energy storage dc/dc current transformer.
Set a small-power discharge and recharge interval [- pm, pm], when p is located at [- pm, pm] when, calculating DC bus-bar voltage
When, p value is pm.
When energy storage device state-of-charge be less than set lower normality threshold and distributed power source current transformer in EIAJ
Under still cannot meet whole loads power demand when, according to load priority level set in advance excise a part of inessential
Load, ensures that important load continues power supply.
Realize the situation of change according to DC bus-bar voltage for each distributed power source current transformer in described micro-capacitance sensor, automatically adjust
The whole means itself exerted oneself are:
When DC bus-bar voltage is located at [umin, umh] when, the operational mode of distributed power source current transformer is maximal power tracing
Pattern；Wherein, umhHigh threshold when dc bus for setting normally runs, uminLower limit for DC bus-bar voltage.
When DC bus-bar voltage u is located at [umh, umax] when, distributed power source current transformer limits Power operation, runs power
psetComputing formula be:
Wherein,umaxFor the higher limit of DC bus-bar voltage, pmaxFor energy storage dc/dc current transformer
Big active power output.
One kind no communicates interconnection direct-current grid off-network energy balance automatic control device, comprising:
Acquisition module, for detecting the soc of energy storage device or the active power of terminal voltage and energy storage dc/dc current transformer
Output；
Control module, for adjusting for connecting dc bus the one of energy storage dc/dc current transformer according to below equation
The voltage of end output, makes in the stable normal interval in a setting of DC bus-bar voltage u:
U=un+ k*p+c,
Wherein, unFor DC bus-bar voltage rated value；K is energy storage dc/dc current transformer output voltage adjustment factor, with energy storage
The soc of device or terminal voltage are related；P is that energy storage dc/dc current transformer active power exports；C is that energy storage dc/dc current transformer adds
Voltage-regulation constant is related to the soc of energy storage device or terminal voltage；Meanwhile, each distributed power source current transformer in micro-capacitance sensor
According to the situation of change of DC bus-bar voltage, adjust automatically itself is exerted oneself.
Realize the situation of change according to DC bus-bar voltage for each distributed power source current transformer in described micro-capacitance sensor, automatically adjust
The whole means itself exerted oneself are:
When DC bus-bar voltage is located at [umin, umh] when, the operational mode of distributed power source current transformer is maximal power tracing
Pattern；
When DC bus-bar voltage u is located at [umh, umax] when, distributed power source current transformer limits Power operation, runs power
psetComputing formula be:
Wherein, umhHigh threshold when dc bus for setting normally runs, uminFor the lower limit of DC bus-bar voltage,umaxFor the higher limit of DC bus-bar voltage, pmaxDefeated for the maximum active power of energy storage dc/dc current transformer
Go out.When cannot mutually communicate inside direct-current grid, obtain the state-of-charge of energy storage device itself, and energy storage dc/dc becomes
The active power output of stream device, is then correspondingly adjusted to DC bus-bar voltage according to the different state-of-charge of energy storage device
Whole, so that DC bus-bar voltage is stably exported, meanwhile, each distributed power source current transformer in micro-capacitance sensor is according to DC bus-bar voltage
Situation of change, adjust automatically itself is exerted oneself.The control method that the present invention provides can stabilize DC micro power grid system off-grid operation
Middle active power fluctuation, realizes the energy balance under whole direct-current grid off-network state, be particularly suited for each current transformer it
Between no communication interconnection, more there is no the central controlled situation of background controller.It is still able in the case of above-mentioned no communication interconnection
Realize the energy balance of direct-current grid off-grid operation, so, the control method that the present invention provides does not rely on communication, accordingly
, fault rate is relatively low.Not only application scenario is quite varied, can be simultaneously suitable for communicating the situation of interconnection and no communication interconnection
Situation, and the reliability of DC micro power grid system off-grid operation can be improved, reduce direct-current grid cost of investment with
And reduce program performance period.
And, in the present invention, by distributed energy is utilized to the adjustment control realization maximum of voltage, reach off-network energy
The target of autonomic balance is it is therefore intended that making full use of of distributed energy.
Brief description
Fig. 1 is direct-current grid topological diagram；
Fig. 2 is the control strategy schematic diagram of energy storage dc/dc current transformer；
Fig. 3 is energy storage device soc charge and discharge control area schematic；
Fig. 4 is the output control schematic diagram of energy storage dc/dc current transformer.
Specific embodiment
Embodiment of the method
DC micro power grid system is as shown in figure 1, comprise distributed power source, electronic power convertor dc/dc and energy storage device
Etc..During direct-current grid autonomous operation, batteries to store energy, as the master control energy source of direct-current grid, maintains direct current
Micro-capacitance sensor voltage is stable, stabilizes the fluctuation of distributed power source and load.In the present embodiment, energy storage device is taking accumulator as a example,
Certainly, it can also be other kinds of energy storage device.
Micro-capacitance sensor when realizing communication interconnection, that is, operates under off-network pattern, energy storage dc/dc current transformer is straight according to it
The soc (or terminal voltage) of stream side accumulator and the size of output, according to formula u=un+kip+ciChange output voltage values,
Thus realization is in the adjust automatically that different energy storage soc are under end-cell voltage condition, to DC bus-bar voltage.Wherein, unFor straight
Stream busbar voltage rated value, kiFor energy storage dc/dc current transformer output voltage adjustment factor, p is energy storage dc/dc current transformer wattful power
Rate exports；ciFor energy storage dc/dc current transformer auxiliary voltage regulating constant.
And, in order to be more effectively controlled, each distributed power source current transformer in direct-current grid off-grid operation according to
The situation of change of DC bus-bar voltage, adjust automatically itself current transformer under different DC bus-bar voltages is exerted oneself, and stabilizes direct current micro-
Active power fluctuation in network system off-grid operation, thus realize the energy balance of whole direct-current grid.Such as meeting
During certain condition, adjust formula: p according to power outputset=p+kpδ u, in combination with MPPT maximum power point tracking (mppt) control
System, adjust automatically itself current transformer under different DC bus-bar voltages is exerted oneself.Belong to routine techniquess because mppt controls, here
No longer mppt control strategy is specifically described in itself.
Below for three kinds of situations, above-mentioned control method is illustrated.
Soc due to accumulator has proportional relation with terminal voltage, and the soc increase of accumulator correspond to its terminal voltage and increases
Greatly, vice versa.So, the present embodiment illustrates to control process taking soc as a example.
As shown in Fig. 2 in DC bus-bar voltage rated value unHeight both sides are set with an interval [uml, umh], this interval
The normal interval of the DC bus-bar voltage for setting, umlLow threshold when dc bus for setting normally runs, that is, bus is being just
Low value when often running, umhHigh threshold when dc bus for setting normally runs, high level when that is, bus normally runs；
pmaxMaximum active power output for energy storage dc/dc current transformer；umaxHigher limit for DC bus-bar voltage is it can be understood as
Big permissible value；uminLower limit for DC bus-bar voltage is it can be understood as minimum permissible value；uml＞ umin, umax＞ umh.
Set the normal range of a soc, for [socl, soch], wherein, soclFor the lower normality threshold setting, sochFor
The upper normality threshold setting.
When the soc of accumulator is within above-mentioned normal range, when that is, terminal voltage is within corresponding normal range, energy storage dc/
Dc current transformer runs on u=u according to power curven+k1p+c1, as shown in the curve 1 in Fig. 2, wherein,By the control of curve 1, DC bus-bar voltage can be made in interval [umin,
umax] in, and make DC bus-bar voltage stable in interval [u furtherml, umh] between.
In addition, in order to avoid energy storage dc/dc current transformer is in small-power discharge and recharge interval [- pm, pm] in carry out discharge and recharge back and forth
The voltage pulsation causing, therefore in small-power interval [- pm, pm] keep DC bus-bar voltage in u1Value, wherein, u1=un+k1pm+
c1.Generally, pmValue less, so, in the present embodiment, pm=5%pmax, certainly, the invention is not limited in
This embodiment.
And, distributed power source current transformer combines the mppt of itself and controls, and adjusts the power output of itself it is ensured that accumulator
It is operated in supplement not put or small-power charge mode, maintain DC micro power grid system stable operation.
When the soc of accumulator or terminal voltage are too high, that is, soc is more than above-mentioned sochWhen, energy storage dc/dc current transformer is according to power
Curve motion is in u=un+k2p+c2, as shown in the curve 2 in Fig. 2, wherein,
By the control of curve 2, DC bus-bar voltage can be made in interval [umin, umax] in, and make DC bus-bar voltage further
Stablize in interval [uml, umh] between.
In addition, in order to avoid energy storage dc/dc current transformer is in small-power discharge and recharge interval [- pm, pm] carry out discharge and recharge back and forth and draw
The voltage pulsation rising, therefore in small-power interval [- pm, pm] keep DC bus-bar voltage in u2Value, u2=un+k2pm+c2.And,
Limit distributed power source generated output, make battery-operated in discharge mode always.
When the soc of accumulator or terminal voltage are low, that is, soc is less than above-mentioned soclWhen, energy storage dc/dc current transformer is according to power
Curve motion is in u=un+k3p+c3, as shown in the curve 3 in Fig. 2, wherein,
By the control of curve 3, DC bus-bar voltage can be made in interval [umin, umax] in, and make DC bus-bar voltage further
Stablize in interval [uml, umh] between.
In addition, in order to avoid energy storage dc/dc current transformer is in small-power discharge and recharge interval [- pm, pm] carry out discharge and recharge back and forth and draw
The voltage pulsation rising, therefore in small-power interval [- pm, pm] keep DC bus-bar voltage in u3Value, u3=un+k3pm+c3.And,
Decontrol distributed power source current transformer and go out power restriction, distributed power source current transformer exports according to itself mppt, maximally utilizes distribution
Formula power supply generates electricity.
As shown in figure 3, controlling the relation schematic diagram and soc between for accumulator cell charging and discharging.
In addition, when the soc of accumulator or terminal voltage are relatively low, that is, soc is less than above-mentioned soclWhen, and distributed power source unsteady flow
When device still cannot meet the power demand of whole loads under EIAJ, energy storage dc/dc current transformer is according to prior delimitation
Load level (i.e. the preferential input grade of load) excises a part of inessential load by exit relay, ensures important load
Continue power supply.
Mentioned above, the busbar voltage size that distributed power source current transformer adjusts according to energy storage dc/dc current transformer, automatically adjust
Whole itself exert oneself, below its specific regulation process is illustrated:
As shown in the curve (1) in Fig. 4, as busbar voltage minimum umin≤ DC bus-bar voltage udc≤ busbar voltage is just
Often run high level umhWhen, distributed power source current transformer is coordinated with mppt control mode, and distributed power source current transformer keeps maximum work
Rate is followed the tracks of mppt and is controlled.
As shown in the curve (2) in Fig. 4, when busbar voltage normally runs high level umh≤ DC bus-bar voltage udc≤ bus
Voltage peak umaxWhen, distributed power source current transformer carries out power voltage droop control, is adjusted certainly according to different busbar voltages
Body power output, particularly as follows: distributed power source current transformer is according to formulaCalculated operation power
psetCarry out limiting Power operation, i.e. low power run.Wherein, psetIt is distributed power source current transformer power output setting value；kp
For distributed power source regulationing factor of power,U is DC bus-bar voltage.In addition, carrying out in distributed power source
During limit Power operation, the present embodiment employs single-slope curve it is also possible to adopt the curve control of many broken lines according to actual needs
Itself output of system adjustment.
So, the object of the invention is not only in [u by stable for DC bus-bar voltageml, umh] interval interior, but in [umin,
umax] the interval utilization carrying out new forms of energy to greatest extent: when voltage is relatively low, carry out maximal power tracing；When voltage is higher
When, carry out limiting Power operation.
Device embodiment
Present embodiments provide one kind and no communicate interconnection direct-current grid off-network energy balance automatic control device, comprising:
Acquisition module, for detecting the soc of energy storage device or the active power of terminal voltage and energy storage dc/dc current transformer
Output；
Control module, for adjusting for connecting dc bus the one of energy storage dc/dc current transformer according to below equation
The voltage of end output, makes in the stable normal interval in a setting of DC bus-bar voltage u:
U=un+ k*p+c,
Wherein, unFor DC bus-bar voltage rated value；K is energy storage dc/dc current transformer output voltage adjustment factor, with energy storage
The soc of device or terminal voltage are related；P is that energy storage dc/dc current transformer active power exports；C is that energy storage dc/dc current transformer adds
Voltage-regulation constant is related to the soc of energy storage device or terminal voltage；Meanwhile, each distributed power source current transformer in micro-capacitance sensor
According to the situation of change of DC bus-bar voltage, adjust automatically itself is exerted oneself.
So, this control device is substantially still control method, and has and control method identical protection domain,
Because this control method has been made that detailed description in said method embodiment, repeat no more here.
It is presented above specific embodiment, but the present invention is not limited to described embodiment.The base of the present invention
This thinking is above-mentioned basic scheme, for those of ordinary skill in the art, according to the teachings of the present invention, designs various changes
The model of shape, formula, parameter do not need to spend creative work.Right without departing from the principles and spirit of the present invention
Change, modification, replacement and modification that embodiment is carried out still fall within protection scope of the present invention.
Claims (10)
1. one kind no communicates interconnection direct-current grid off-network energy balance autonomous control method it is characterised in that first, detection storage
Can the soc of device or the active power output of terminal voltage and energy storage dc/dc current transformer；Then, adjusted according to below equation
The voltage that one end for connecting dc bus of whole energy storage dc/dc current transformer exports, makes DC bus-bar voltage u stable at one
In the normal interval setting:
U=un+ k*p+c,
Wherein, unFor DC bus-bar voltage rated value；K is energy storage dc/dc current transformer output voltage adjustment factor, with energy storage device
Soc or terminal voltage related；P is that energy storage dc/dc current transformer active power exports；C is energy storage dc/dc current transformer auxiliary voltage
Regulating constant is related to the soc of energy storage device or terminal voltage；Meanwhile, each distributed power source current transformer in micro-capacitance sensor according to
The situation of change of DC bus-bar voltage, adjust automatically itself is exerted oneself.
2. no communication interconnection direct-current grid off-network energy balance autonomous control method according to claim 1, its feature
It is,
When the soc of energy storage device or terminal voltage are located at an interval being made up of the upper normality threshold setting and lower normality threshold
When interior,The described normal interval setting is as [uml, umh], umlStraight for set
Low threshold when stream bus normally runs, umhHigh threshold when dc bus for setting normally runs, pmaxFor energy storage dc/dc
The maximum active power output of current transformer.
3. no communication interconnection direct-current grid off-network energy balance autonomous control method according to claim 1, its feature
It is,
When the soc of energy storage device or terminal voltage are more than the upper normality threshold setting, The described normal interval setting is as [uml, umh], umlWhen dc bus for setting normally runs
Low threshold, umhHigh threshold when dc bus for setting normally runs, umaxFor the higher limit of described DC bus-bar voltage, umax
＞ umh, pmaxMaximum active power output for energy storage dc/dc current transformer.
4. no communication interconnection direct-current grid off-network energy balance autonomous control method according to claim 1, its feature
It is,
When the soc of energy storage device or terminal voltage are less than the lower normality threshold setting, The described normal interval setting is as [uml, umh], umlWhen dc bus for setting normally runs
Low threshold, umhHigh threshold when dc bus for setting normally runs, uminFor the lower limit of DC bus-bar voltage, uml＞
umin, pmaxMaximum active power output for energy storage dc/dc current transformer.
5. the no communication interconnection direct-current grid off-network energy balance autonomous control method according to Claims 2 or 3 or 4,
It is characterized in that,
Set a small-power discharge and recharge interval [- pm, pm], when p is located at [- pm, pm] when, when calculating DC bus-bar voltage, p takes
It is worth for pm.
6. no communication interconnection direct-current grid off-network energy balance autonomous control method according to claim 4, its feature
It is,
When energy storage device state-of-charge be less than set lower normality threshold and distributed power source current transformer under EIAJ still
So cannot meet whole loads power demand when, a part of inessential negative according to load priority level set in advance excision
Lotus, ensures that important load continues power supply.
7. no communication interconnection direct-current grid off-network energy balance autonomous control method according to claim 1, its feature
It is,
Realize the situation of change according to DC bus-bar voltage for each distributed power source current transformer in described micro-capacitance sensor, adjust automatically is certainly
The means that body is exerted oneself are:
When DC bus-bar voltage is located at [umin, umh] when, the operational mode of distributed power source current transformer is maximal power tracing mould
Formula；Wherein, umhHigh threshold when dc bus for setting normally runs, uminLower limit for DC bus-bar voltage.
8. no communication interconnection direct-current grid off-network energy balance autonomous control method according to claim 7, its feature
It is,
When DC bus-bar voltage u is located at [umh, umax] when, distributed power source current transformer limits Power operation, runs power pset's
Computing formula is:
Wherein,umaxFor the higher limit of DC bus-bar voltage, pmaxMaximum for energy storage dc/dc current transformer has
Work(power output.
9. one kind no communicates interconnection direct-current grid off-network energy balance automatic control device it is characterised in that including:
Acquisition module, the active power for detecting the soc of energy storage device or terminal voltage and energy storage dc/dc current transformer is defeated
Go out；
Control module, the one end for connecting dc bus for adjusting energy storage dc/dc current transformer according to below equation is defeated
The voltage going out, makes in the stable normal interval in a setting of DC bus-bar voltage u:
U=un+ k*p+c,
Wherein, unFor DC bus-bar voltage rated value；K is energy storage dc/dc current transformer output voltage adjustment factor, with energy storage device
Soc or terminal voltage related；P is that energy storage dc/dc current transformer active power exports；C is energy storage dc/dc current transformer auxiliary voltage
Regulating constant is related to the soc of energy storage device or terminal voltage；Meanwhile, each distributed power source current transformer in micro-capacitance sensor according to
The situation of change of DC bus-bar voltage, adjust automatically itself is exerted oneself.
10. no communication interconnection direct-current grid off-network energy balance automatic control device according to claim 9, its feature
It is,
Realize the situation of change according to DC bus-bar voltage for each distributed power source current transformer in described micro-capacitance sensor, adjust automatically is certainly
The means that body is exerted oneself are:
When DC bus-bar voltage is located at [umin, umh] when, the operational mode of distributed power source current transformer is maximal power tracing mould
Formula；
When DC bus-bar voltage u is located at [umh, umax] when, distributed power source current transformer limits Power operation, runs power pset's
Computing formula is:
Wherein, umhHigh threshold when dc bus for setting normally runs, uminFor the lower limit of DC bus-bar voltage,umaxFor the higher limit of DC bus-bar voltage, pmaxDefeated for the maximum active power of energy storage dc/dc current transformer
Go out.
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| CN112383092A (en) * | 2020-11-24 | 2021-02-19 | 珠海格力电器股份有限公司 | Energy scheduling method, device and system |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN112383092A (en) * | 2020-11-24 | 2021-02-19 | 珠海格力电器股份有限公司 | Energy scheduling method, device and system |
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