CN108494023A - A kind of active output control system of photovoltaic plant and method - Google Patents
A kind of active output control system of photovoltaic plant and method Download PDFInfo
- Publication number
- CN108494023A CN108494023A CN201810302805.XA CN201810302805A CN108494023A CN 108494023 A CN108494023 A CN 108494023A CN 201810302805 A CN201810302805 A CN 201810302805A CN 108494023 A CN108494023 A CN 108494023A
- Authority
- CN
- China
- Prior art keywords
- photovoltaic
- active
- generation unit
- photovoltaic plant
- ppvmax
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
- 238000000034 method Methods 0.000 title claims abstract description 23
- 230000035945 sensitivity Effects 0.000 claims abstract description 39
- 238000004146 energy storage Methods 0.000 claims abstract description 29
- 239000003990 capacitor Substances 0.000 claims description 48
- 230000005611 electricity Effects 0.000 claims description 10
- 238000010586 diagram Methods 0.000 description 4
- 238000005516 engineering process Methods 0.000 description 3
- 230000003044 adaptive effect Effects 0.000 description 2
- 230000007812 deficiency Effects 0.000 description 2
- 238000010248 power generation Methods 0.000 description 2
- 230000006978 adaptation Effects 0.000 description 1
- 230000002411 adverse Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000035800 maturation Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000013589 supplement Substances 0.000 description 1
- 238000012795 verification Methods 0.000 description 1
Classifications
-
- 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
- H02J3/00—Circuit arrangements for ac mains or ac distribution networks
- H02J3/38—Arrangements for parallely feeding a single network by two or more generators, converters or transformers
- H02J3/46—Controlling of the sharing of output between the generators, converters, or transformers
- H02J3/48—Controlling the sharing of the in-phase component
-
- H02J3/383—
-
- 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
- H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
- H02J7/34—Parallel operation in networks using both storage and other dc sources, e.g. providing buffering
- H02J7/345—Parallel operation in networks using both storage and other dc sources, e.g. providing buffering using capacitors as storage or buffering devices
-
- 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
- H02J2203/00—Indexing scheme relating to details of circuit arrangements for AC mains or AC distribution networks
- H02J2203/20—Simulating, e g planning, reliability check, modelling or computer assisted design [CAD]
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E10/00—Energy generation through renewable energy sources
- Y02E10/50—Photovoltaic [PV] energy
- Y02E10/56—Power conversion systems, e.g. maximum power point trackers
Abstract
The invention discloses a kind of active output control system of photovoltaic plant and methods, include the following steps：1）Calculate active po wer sensitivity and sensitivity summation at each photovoltaic generation unit grid entry point inside photovoltaic system；2）P (U) policing algorithm is determined according to sensitivity, obtains grid entry point voltage U and photovoltaic plant load demand power P* is exported by P (U) policing algorithm；3) by photovoltaic plant load demand power P* and photovoltaic generation unit Ppvmax by subtracter handle determine electric energy storage device whether put into output it is active；4）According to the time of load demand power, the time of the input coefficient of different electric energy storage devices is determined；5）The time of the input coefficient of the photovoltaic generation unit quantity and electric energy storage device that are put into according to determining photovoltaic plant, control photovoltaic plant output are active.The present invention can safely and efficiently control the output of photovoltaic plant.
Description
Technical field
The application belongs to new energy technical field, more particularly to the active output control system of a kind of photovoltaic plant and side
Method.
Background technology
In recent years, with the continuous reduction of photovoltaic system cost and the maturation of grid-connected technology, large-scale photovoltaic power generation
Increasingly favored by international community.Large-scale photovoltaic power station is typically set up in the abundant outlying district of solar energy resources, phase
For middle-size and small-size photovoltaic system, more focus utilization solar energy, control shunt chopper can be managed.But with photovoltaic
Power generation ratio in electric network source constantly increases, and photovoltaic electric energy needs remote conveying to be sent to load center, and photovoltaic system is to power grid
Voltage stability has an adverse effect.Some photovoltaic systems solve power grid electricity caused by photovoltaic access only with constant dc power control
Out-of-limit problem is pressed, but can only realize that unidirectional drop is contributed and run.Somewhat by energy storage device, inhibit photovoltaic system active power output
The influence to Network Voltage Stability is fluctuated, but needs the control technology of additional energy storage device and complexity.
Since photovoltaic power supply has unstability and changes over time and randomness, the stability of the active output of photovoltaic plant
Can not effective guarantee, cause what photovoltaic plant can not be adaptive meet the needs of of load, need the section time especially for load
When high-power power is provided, be easy to cause photovoltaic plant at full capacity or it is super meet operation, seriously affect the safety of photovoltaic plant
And service life.
Invention content
To solve above-mentioned technical problem：The application proposes a kind of active output control method of photovoltaic plant, including following step
Suddenly：
1）Calculate active po wer sensitivity and sensitivity summation at each photovoltaic generation unit grid entry point inside photovoltaic system；
2）P (U) policing algorithm is determined according to sensitivity, obtains grid entry point voltage U and photovoltaic electric is exported by P (U) policing algorithm
Stand load demand power P*；
3) photovoltaic plant load demand power P* and photovoltaic generation unit Ppvmax is handled by subtracter and determines power storage
It is active whether device puts into output；
4）According to the time of load demand power, the time of the input coefficient of different electric energy storage devices is determined；
5）The time of the input coefficient of the photovoltaic generation unit quantity and electric energy storage device that are put into according to determining photovoltaic plant,
It is active to control photovoltaic plant output.
The active output control method of the photovoltaic plant, the P（U）Policing algorithm is carried out using following formula：
Wherein, Pmax is the exportable maximum power of photovoltaic plant comprising photovoltaic generation unit gross output value and electric energy
The exportable maximum value of memory device, U1, U2, U3, U4 are photovoltaic plant output voltage predetermined voltage threshold,For n-th of light
The active po wer sensitivity at generator unit grid entry point is lied prostrate,For the exportable maximum power of n-th of photovoltaic generation unit, Pc is electricity
It can the active output valve of memory device.
The active output control method of the photovoltaic plant, active po wer sensitivity summation are
Wherein, n is parallel photovoltaic generator unit number,It is that i-th of photovoltaic generation unit is active to export to grid entry point voltage
The sensitivity of amplitude, wherein。
The active output control method of the photovoltaic plant, the electric energy storage device include super capacitor, electrolytic capacitor
And accumulator.
The active output control method of the photovoltaic plant, Pmax=Pcmax+Pbmax+Ppvmax,
Pcmax=Uc*Ic*tc,
Pbmax=Ub*Ib*tb,
,
Wherein, wherein the Pcmax is the exportable maximum power value of super capacitor, and Pbmax is that accumulator is exportable most
High-power value, Ppvmax are the exportable maximum power value of photovoltaic generation unit；Uc, Ic are respectively the exportable electricity of super capacitor
Pressure, current value, tc are the discharge time of super capacitor, and Ub, Ib are respectively the exportable voltage of accumulator, current value, and tb is to store
The discharge time of battery,For the active po wer sensitivity at n-th of photovoltaic generation unit grid entry point,For n-th of photovoltaic generation
The exportable maximum power of unit, tc<tb.
The active output control method of the photovoltaic plant,
Work as P*<When Ppvmax, at this point, the active output of photovoltaic plant is all powered by photovoltaic generation unit；
Work as P*>When Ppvmax, (P*- Ppvmax)<When Pcmax, photovoltaic plant it is active output all by photovoltaic generation unit,
Super capacitor is powered；
(P*- Ppvmax)>When Pcmax, as demand power-on time t>When tb, the active output of photovoltaic plant is Pmax；
As demand power-on time tc<t<When tb, is first powered the tc times by photovoltaic generation unit, super capacitor, then sent out by photovoltaic
Electric unit, storage battery power supply tb-tc times；
As demand power-on time t<When tc, photovoltaic generation unit, performance number Pt=Ppvmax of super capacitor power supply t times are calculated
+ t*Pcmax/tc, the then current value for the performance number that accumulator needs export,
Compare the size of Ibt and Ib, if Ibt>Ib then exports information warning, while it is defeated according to Ib current values to control accumulator
Go out, if Ibt<Ib or Ibt=Ib then controls accumulator according to Ibt current value output currents.
A kind of active output control system of photovoltaic plant, including：
Sensitivity determining module calculates the active po wer sensitivity inside photovoltaic system at each photovoltaic generation unit grid entry point and sensitivity
Summation；
Computing module is exported, P (U) policing algorithm is determined according to sensitivity；
Output demand determining module obtains grid entry point voltage U and exports photovoltaic plant loading demand work(by P (U) policing algorithm
Rate P*；
Photovoltaic plant output device determining module, photovoltaic plant load demand power P* and photovoltaic generation unit Ppvmax are passed through
It is active that subtracter processing determines whether electric energy storage device puts into output；
Making time computing module determines the input coefficient of different electric energy storage devices according to the time of load demand power
Time；
Control module, according to the input coefficient of photovoltaic generation unit quantity and electric energy storage device that determining photovoltaic plant is put into
Time, control photovoltaic plant output it is active.
The active output control system of the photovoltaic plant, the photovoltaic plant include n photovoltaic generation unit in parallel,
At least two super capacitors in parallel, at least two accumulators in parallel.
The active output control system of the photovoltaic plant, the photovoltaic plant output device determining module determine that photovoltaic is sent out
Whether electric unit, super capacitor, accumulator, which put into, provides particular number that is active, and determining input, determines the specific of input
Including：Power computation module, the power computation module are used to calculate Pmax=Pcmax+Pbmax+Ppvmax,
Pcmax=Uc*Ic*tc,
Pbmax=Ub*Ib*tb,
,
Wherein, wherein the Pcmax is the exportable maximum power value of super capacitor, and Pbmax is that accumulator is exportable most
High-power value, Ppvmax are the exportable maximum power value of photovoltaic generation unit；Uc, Ic are respectively the exportable electricity of super capacitor
Pressure, current value, tc are the discharge time of super capacitor, and Ub, Ib are respectively the exportable voltage of accumulator, current value, and tb is to store
The discharge time of battery,For the active po wer sensitivity at n-th of photovoltaic generation unit grid entry point,For n-th of photovoltaic generation
The exportable maximum power of unit, tc<tb.
The active output control system of the photovoltaic plant, the making time computing module specifically include：Work as P*<
When Ppvmax, at this point, the active output of photovoltaic plant is all powered by photovoltaic generation unit；
Work as P*>When Ppvmax, (P*- Ppvmax)<When Pcmax, photovoltaic plant it is active output all by photovoltaic generation unit,
Super capacitor is powered；
(P*- Ppvmax)>When Pcmax, as demand power-on time t>When tb, the active output of photovoltaic plant is Pmax；
As demand power-on time tc<t<When tb, is first powered the tc times by photovoltaic generation unit, super capacitor, then sent out by photovoltaic
Electric unit, storage battery power supply tb-tc times；
As demand power-on time t<When tc, photovoltaic generation unit, performance number Pt=Ppvmax of super capacitor power supply t times are calculated
+ t*Pcmax/tc, the then current value for the performance number that accumulator needs export,
Compare the size of Ibt and Ib, if Ibt>Ib then exports information warning, while it is defeated according to Ib current values to control accumulator
Go out, if Ibt<Ib or Ibt=Ib then controls accumulator according to Ibt current value output currents.
The application can flexibly control active output according to the demand that photovoltaic plant loads, in particular for photovoltaic plant
When photovoltaic generation unit deficiency, cooperation electric energy storage device carries out fast power output, greatly maintains photovoltaic plant
The time of power supply and the efficiency value of power supply coordinate according to photovoltaic generation unit and electric energy storage device, meet the power supply of load
Time requirement；Meanwhile considering safety factor, electric energy storage device overload operation is prevented, electric energy is controlled in safe range and is deposited
The power supply of memory device.
Description of the drawings
Fig. 1 is the active output control method schematic diagram of the application photovoltaic plant.
Fig. 2 is the active output control system schematic diagram of the application photovoltaic plant.
Specific implementation mode
The application is described in further detail below in conjunction with the accompanying drawings, it is necessary to it is indicated herein to be, implement in detail below
Mode is served only for that the application is further detailed, and should not be understood as the limitation to the application protection domain, the field
Technical staff can make some nonessential modifications and adaptations according to above-mentioned application content to the application.
It is as shown in Figure 1 the active output control method schematic diagram of the application photovoltaic plant, includes the following steps：
1）Calculate active po wer sensitivity and sensitivity summation at each photovoltaic generation unit grid entry point inside photovoltaic system；
2）P (U) policing algorithm is determined according to sensitivity, obtains grid entry point voltage U and photovoltaic electric is exported by P (U) policing algorithm
Stand load demand power P*；
3) photovoltaic plant load demand power P* and photovoltaic generation unit Ppvmax is handled by subtracter and determines power storage
It is active whether device puts into output；
4）According to the time of load demand power, the time of the input coefficient of different electric energy storage devices is determined；
5）The time of the input coefficient of the photovoltaic generation unit quantity and electric energy storage device that are put into according to determining photovoltaic plant,
It is active to control photovoltaic plant output.
The active output control method of the photovoltaic plant, the P（U）Policing algorithm is carried out using following formula：
Wherein, Pmax is the exportable maximum power of photovoltaic plant comprising photovoltaic generation unit gross output value and electric energy
The exportable maximum value of memory device, U1, U2, U3, U4 are photovoltaic plant output voltage predetermined voltage threshold,For n-th of light
The active po wer sensitivity at generator unit grid entry point is lied prostrate,For the exportable maximum power of n-th of photovoltaic generation unit, Pc is electricity
It can the active output valve of memory device.
The active output control method of the photovoltaic plant, active po wer sensitivity summation are
Wherein, n is parallel photovoltaic generator unit number,It is that i-th of photovoltaic generation unit is active to export to grid entry point voltage
The sensitivity of amplitude, wherein。
The active output control method of the photovoltaic plant, the electric energy storage device include super capacitor, electrolytic capacitor
And accumulator.
The active output control method of the photovoltaic plant, Pmax=Pcmax+Pbmax+Ppvmax,
Pcmax=Uc*Ic*tc,
Pbmax=Ub*Ib*tb,
,
Wherein, wherein the Pcmax is the exportable maximum power value of super capacitor, and Pbmax is that accumulator is exportable most
High-power value, Ppvmax are the exportable maximum power value of photovoltaic generation unit；Uc, Ic are respectively the exportable electricity of super capacitor
Pressure, current value, tc are the discharge time of super capacitor, and Ub, Ib are respectively the exportable voltage of accumulator, current value, and tb is to store
The discharge time of battery,For the active po wer sensitivity at n-th of photovoltaic generation unit grid entry point,For n-th of photovoltaic generation
The exportable maximum power of unit, tc<tb.
The active output control method of the photovoltaic plant,
Work as P*<When Ppvmax, at this point, the active output of photovoltaic plant is all powered by photovoltaic generation unit；
Work as P*>When Ppvmax, (P*- Ppvmax)<When Pcmax, photovoltaic plant it is active output all by photovoltaic generation unit,
Super capacitor is powered；
(P*- Ppvmax)>When Pcmax, as demand power-on time t>When tb, the active output of photovoltaic plant is Pmax；
As demand power-on time tc<t<When tb, is first powered the tc times by photovoltaic generation unit, super capacitor, then sent out by photovoltaic
Electric unit, storage battery power supply tb-tc times；
As demand power-on time t<When tc, photovoltaic generation unit, performance number Pt=Ppvmax of super capacitor power supply t times are calculated
+ t*Pcmax/tc, the then current value for the performance number that accumulator needs export,
Compare the size of Ibt and Ib, if Ibt>Ib then exports information warning, while it is defeated according to Ib current values to control accumulator
Go out, if Ibt<Ib or Ibt=Ib then controls accumulator according to Ibt current value output currents.
As shown in Fig. 2, be the active output control system schematic diagram of the application photovoltaic plant, including：
Sensitivity determining module calculates the active po wer sensitivity inside photovoltaic system at each photovoltaic generation unit grid entry point and sensitivity
Summation；
Computing module is exported, P (U) policing algorithm is determined according to sensitivity；
Output demand determining module obtains grid entry point voltage U and exports photovoltaic plant loading demand work(by P (U) policing algorithm
Rate P*；
Photovoltaic plant output device determining module, photovoltaic plant load demand power P* and photovoltaic generation unit Ppvmax are passed through
It is active that subtracter processing determines whether electric energy storage device puts into output；
Making time computing module determines the input coefficient of different electric energy storage devices according to the time of load demand power
Time；
Control module, according to the input coefficient of photovoltaic generation unit quantity and electric energy storage device that determining photovoltaic plant is put into
Time, control photovoltaic plant output it is active.
The active output control system of the photovoltaic plant, the photovoltaic plant include n photovoltaic generation unit in parallel,
At least two super capacitors in parallel, at least two accumulators in parallel.
The active output control system of the photovoltaic plant, the photovoltaic plant output device determining module determine that photovoltaic is sent out
Whether electric unit, super capacitor, accumulator, which put into, provides particular number that is active, and determining input, determines the specific of input
Including：Power computation module, the power computation module are used to calculate Pmax=Pcmax+Pbmax+Ppvmax,
Pcmax=Uc*Ic*tc,
Pbmax=Ub*Ib*tb,
,
Wherein, wherein the Pcmax is the exportable maximum power value of super capacitor, and Pbmax is that accumulator is exportable most
High-power value, Ppvmax are the exportable maximum power value of photovoltaic generation unit；Uc, Ic are respectively the exportable electricity of super capacitor
Pressure, current value, tc are the discharge time of super capacitor, and Ub, Ib are respectively the exportable voltage of accumulator, current value, and tb is to store
The discharge time of battery,For the active po wer sensitivity at n-th of photovoltaic generation unit grid entry point,For n-th of photovoltaic generation
The exportable maximum power of unit, tc<tb.
The active output control system of the photovoltaic plant, the making time computing module specifically include：Work as P*<
When Ppvmax, at this point, the active output of photovoltaic plant is all powered by photovoltaic generation unit；
Work as P*>When Ppvmax, (P*- Ppvmax)<When Pcmax, photovoltaic plant it is active output all by photovoltaic generation unit,
Super capacitor is powered；
(P*- Ppvmax)>When Pcmax, as demand power-on time t>When tb, the active output of photovoltaic plant is Pmax；
As demand power-on time tc<t<When tb, is first powered the tc times by photovoltaic generation unit, super capacitor, then sent out by photovoltaic
Electric unit, storage battery power supply tb-tc times；
As demand power-on time t<When tc, photovoltaic generation unit, performance number Pt=Ppvmax of super capacitor power supply t times are calculated
+ t*Pcmax/tc, the then current value for the performance number that accumulator needs export,
Compare the size of Ibt and Ib, if Ibt>Ib then exports information warning, while it is defeated according to Ib current values to control accumulator
Go out.
Control module should (Ibt-Ib) Ub by being converted to digital code, be sent to loading demand terminal, selected by user
It selects and whether retains this Partial Power, if user's selection still retains the Partial Power, send verification, user is provided and whether may be used
To extend power-on time, the extended specific time is calculated,, wherein specific time t1 will be extended and be sent to
User then executes extension operation if the user determine that extending, if user's selection does not extend, the power of (Ibt-Ib) Ub is logical
Power grid urgency call is crossed, alternatively, the stand-by power supply urgency call by starting photovoltaic plant, after the completion, rapidly to stand-by power supply
Carry out energy supplement or the feedback grid Partial Power.
If Ibt<Ib or Ibt=Ib then controls accumulator according to Ibt current value output currents.
The application can flexibly control active output according to the demand that photovoltaic plant loads, in particular for photovoltaic plant
When photovoltaic generation unit deficiency, cooperation electric energy storage device carries out fast power output, greatly maintains photovoltaic plant
The time of power supply and the efficiency value of power supply coordinate according to photovoltaic generation unit and electric energy storage device, meet the power supply of load
Time requirement；Meanwhile considering safety factor, electric energy storage device overload operation is prevented, electric energy is controlled in safe range and is deposited
The power supply of memory device.While the present invention can make full use of photovoltaic generation unit, the power of adaptive coordination load
Demand, while ensureing the safe operation of photovoltaic plant, effectively raise the service life of photovoltaic plant.
Claims (10)
1. a kind of active output control method of photovoltaic plant, it is characterised in that：Include the following steps：
1）Calculate active po wer sensitivity and sensitivity summation at each photovoltaic generation unit grid entry point inside photovoltaic system；
2）P (U) policing algorithm is determined according to sensitivity, obtains grid entry point voltage U and photovoltaic electric is exported by P (U) policing algorithm
Stand load demand power P*；
3) photovoltaic plant load demand power P* and photovoltaic generation unit Ppvmax is handled by subtracter and determines power storage
It is active whether device puts into output；
4）According to the time of load demand power, the time of the input coefficient of different electric energy storage devices is determined；
5）The time of the input coefficient of the photovoltaic generation unit quantity and electric energy storage device that are put into according to determining photovoltaic plant,
It is active to control photovoltaic plant output.
2. the active output control method of photovoltaic plant as described in claim 1, it is characterised in that：The P（U）Policing algorithm is adopted
It is carried out with following formula：
Wherein, Pmax is the exportable maximum power of photovoltaic plant comprising photovoltaic generation unit gross output value and electric energy
The exportable maximum value of memory device, U1, U2, U3, U4 are photovoltaic plant output voltage predetermined voltage threshold,For n-th of light
The active po wer sensitivity at generator unit grid entry point is lied prostrate,For the exportable maximum power of n-th of photovoltaic generation unit, Pc is electricity
It can the active output valve of memory device.
3. the active output control method of photovoltaic plant as claimed in claim 2, it is characterised in that：Active po wer sensitivity summation is
Wherein, n is parallel photovoltaic generator unit number,It is that i-th of photovoltaic generation unit is active to export to grid entry point voltage
The sensitivity of amplitude, wherein。
4. the active output control method of photovoltaic plant as described in claim 1, it is characterised in that：The electric energy storage device packet
Include super capacitor, electrolytic capacitor and accumulator.
5. the active output control method of photovoltaic plant as claimed in claim 4, it is characterised in that： Pmax=Pcmax+Pbmax+
Ppvmax,
Pcmax=Uc*Ic*tc,
Pbmax=Ub*Ib*tb,
,
Wherein, wherein the Pcmax is the exportable maximum power value of super capacitor, and Pbmax is that accumulator is exportable most
High-power value, Ppvmax are the exportable maximum power value of photovoltaic generation unit；Uc, Ic are respectively the exportable electricity of super capacitor
Pressure, current value, tc are the discharge time of super capacitor, and Ub, Ib are respectively the exportable voltage of accumulator, current value, and tb is to store
The discharge time of battery,For the active po wer sensitivity at n-th of photovoltaic generation unit grid entry point,For n-th of photovoltaic generation
The exportable maximum power of unit, tc<tb.
6. the active output control method of photovoltaic plant as claimed in claim 5, it is characterised in that：
Work as P*<When Ppvmax, at this point, the active output of photovoltaic plant is all powered by photovoltaic generation unit；
Work as P*>When Ppvmax, (P*- Ppvmax)<When Pcmax, photovoltaic plant it is active output all by photovoltaic generation unit,
Super capacitor is powered；
(P*- Ppvmax)>When Pcmax, as demand power-on time t>When tb, the active output of photovoltaic plant is Pmax；
As demand power-on time tc<t<When tb, is first powered the tc times by photovoltaic generation unit, super capacitor, then sent out by photovoltaic
Electric unit, storage battery power supply tb-tc times；
As demand power-on time t<When tc, photovoltaic generation unit, performance number Pt=Ppvmax of super capacitor power supply t times are calculated
+ t*Pcmax/tc, the then current value for the performance number that accumulator needs export,
Compare the size of Ibt and Ib, if Ibt>Ib then exports information warning, while it is defeated according to Ib current values to control accumulator
Go out, if Ibt<Ib or Ibt=Ib then controls accumulator according to Ibt current value output currents.
7. a kind of active output control system of photovoltaic plant, it is characterised in that：Including：
Sensitivity determining module calculates the active po wer sensitivity inside photovoltaic system at each photovoltaic generation unit grid entry point and sensitivity
Summation；
Computing module is exported, P (U) policing algorithm is determined according to sensitivity；
Output demand determining module obtains grid entry point voltage U and exports photovoltaic plant loading demand work(by P (U) policing algorithm
Rate P*；
Photovoltaic plant output device determining module, photovoltaic plant load demand power P* and photovoltaic generation unit Ppvmax are passed through
It is active that subtracter processing determines whether electric energy storage device puts into output；
Making time computing module determines the input coefficient of different electric energy storage devices according to the time of load demand power
Time；
Control module, according to the input coefficient of photovoltaic generation unit quantity and electric energy storage device that determining photovoltaic plant is put into
Time, control photovoltaic plant output it is active.
8. the active output control system of photovoltaic plant as claimed in claim 7, it is characterised in that：The photovoltaic plant includes n
The photovoltaic generation unit of a parallel connection, at least two super capacitors in parallel, at least two accumulators in parallel.
9. the active output control system of photovoltaic plant as claimed in claim 8, it is characterised in that：The photovoltaic plant follower
Part determining module determines whether photovoltaic generation unit, super capacitor, accumulator put into and provides specific number that is active, and determining input
Amount determines specifically including for input：Power computation module, the power computation module is for calculating Pmax=Pcmax+Pbmax
+ Ppvmax,
Pcmax=Uc*Ic*tc,
Pbmax=Ub*Ib*tb,
,
Wherein, wherein the Pcmax is the exportable maximum power value of super capacitor, and Pbmax is that accumulator is exportable most
High-power value, Ppvmax are the exportable maximum power value of photovoltaic generation unit；Uc, Ic are respectively the exportable electricity of super capacitor
Pressure, current value, tc are the discharge time of super capacitor, and Ub, Ib are respectively the exportable voltage of accumulator, current value, and tb is to store
The discharge time of battery,For the active po wer sensitivity at n-th of photovoltaic generation unit grid entry point,For n-th of photovoltaic generation
The exportable maximum power of unit, tc<tb.
10. the active output control system of photovoltaic plant as claimed in claim 9, it is characterised in that：The making time calculates
Module specifically includes：Work as P*<When Ppvmax, at this point, the active output of photovoltaic plant is all powered by photovoltaic generation unit；
Work as P*>When Ppvmax, (P*- Ppvmax)<When Pcmax, photovoltaic plant it is active output all by photovoltaic generation unit,
Super capacitor is powered；
(P*- Ppvmax)>When Pcmax, as demand power-on time t>When tb, the active output of photovoltaic plant is Pmax；
As demand power-on time tc<t<When tb, is first powered the tc times by photovoltaic generation unit, super capacitor, then sent out by photovoltaic
Electric unit, storage battery power supply tb-tc times；
As demand power-on time t<When tc, photovoltaic generation unit, performance number Pt=Ppvmax of super capacitor power supply t times are calculated
+ t*Pcmax/tc, the then current value for the performance number that accumulator needs export,
Compare the size of Ibt and Ib, if Ibt>Ib then exports information warning, while it is defeated according to Ib current values to control accumulator
Go out, if Ibt<Ib or Ibt=Ib then controls accumulator according to Ibt current value output currents.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810302805.XA CN108494023B (en) | 2018-04-06 | 2018-04-06 | Active power output control system and method for photovoltaic power station |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810302805.XA CN108494023B (en) | 2018-04-06 | 2018-04-06 | Active power output control system and method for photovoltaic power station |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN108494023A true CN108494023A (en) | 2018-09-04 |
| CN108494023B CN108494023B (en) | 2021-05-04 |
Family
ID=63314721
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810302805.XA Expired - Fee Related CN108494023B (en) | 2018-04-06 | 2018-04-06 | Active power output control system and method for photovoltaic power station |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN108494023B (en) |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20070097565A1 (en) * | 2005-10-27 | 2007-05-03 | Shinya Oohara | Distributed generation system and power system stabilizing method |
| CN103268136A (en) * | 2013-05-10 | 2013-08-28 | 国电南瑞南京控制系统有限公司 | Active power control method of photovoltaic power station |
| CN103580030A (en) * | 2013-11-26 | 2014-02-12 | 重庆大学 | Reactive voltage control method and system for grid-connected photovoltaic power station |
| CN105281360A (en) * | 2015-09-14 | 2016-01-27 | 国家电网公司 | Distributed photovoltaic automatic generating control method based on sensitivity |
| CN107302230A (en) * | 2017-08-28 | 2017-10-27 | 苏州思创源博电子科技有限公司 | A kind of photovoltaic power generation equipment is incorporated into the power networks optimization method |
| CN107508318A (en) * | 2017-08-29 | 2017-12-22 | 国网浙江省电力公司宁波供电公司 | A kind of real power control method and system based on voltage sensibility subregion |
| CN107834604A (en) * | 2017-12-01 | 2018-03-23 | 宋绍哲 | A kind of active output control system of photovoltaic plant and method |
-
2018
- 2018-04-06 CN CN201810302805.XA patent/CN108494023B/en not_active Expired - Fee Related
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20070097565A1 (en) * | 2005-10-27 | 2007-05-03 | Shinya Oohara | Distributed generation system and power system stabilizing method |
| CN103268136A (en) * | 2013-05-10 | 2013-08-28 | 国电南瑞南京控制系统有限公司 | Active power control method of photovoltaic power station |
| CN103580030A (en) * | 2013-11-26 | 2014-02-12 | 重庆大学 | Reactive voltage control method and system for grid-connected photovoltaic power station |
| CN105281360A (en) * | 2015-09-14 | 2016-01-27 | 国家电网公司 | Distributed photovoltaic automatic generating control method based on sensitivity |
| CN107302230A (en) * | 2017-08-28 | 2017-10-27 | 苏州思创源博电子科技有限公司 | A kind of photovoltaic power generation equipment is incorporated into the power networks optimization method |
| CN107508318A (en) * | 2017-08-29 | 2017-12-22 | 国网浙江省电力公司宁波供电公司 | A kind of real power control method and system based on voltage sensibility subregion |
| CN107834604A (en) * | 2017-12-01 | 2018-03-23 | 宋绍哲 | A kind of active output control system of photovoltaic plant and method |
Also Published As
| Publication number | Publication date |
|---|---|
| CN108494023B (en) | 2021-05-04 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN107181274B (en) | Method for accessing new energy into flexible direct current power grid | |
| CN104779645B (en) | A kind of photovoltaic generating system and its control method | |
| CN104410105B (en) | Based on dc bus cancellated Intelligent wind power field control method | |
| CN103733465B (en) | Charging device | |
| CN105846419B (en) | Photovoltaic, diesel oil complementary power supply system based on direct-current grid | |
| US20140210275A1 (en) | Photovoltaic power generation system including apparatus and method to buffer power fluctuations | |
| CN103647274A (en) | Micro-grid system being capable of grid-connected and off-grid operation, and energy control method | |
| CN103986190A (en) | Wind and solar storage combining power generation system smooth control method based on power generation power curves | |
| CN103972976A (en) | Electric energy supply system | |
| CN103151799B (en) | A kind of micro-capacitance sensor electric power system and control method | |
| CN105680771A (en) | Wind-solar complementary generation system and control method | |
| CN114039371A (en) | Charging and discharging control method and charging and discharging control circuit for energy storage inverter battery | |
| CN106505558A (en) | A kind of energy conveying control method of DC distribution net and device | |
| CN202651806U (en) | Smooth wind-power photovoltaic power generation control system of battery energy storage station | |
| CN103560533B (en) | The method and system of the level and smooth wind light generation fluctuation of energy-accumulating power station are controlled based on rate of change | |
| KR102092088B1 (en) | Apparatus and method for energy storage system controlling operating mode | |
| CN105576749A (en) | Method and system for controlling photovoltaic energy storage charging pile to run | |
| CN104467146B (en) | A kind of electric energy intelligent allocation current converter | |
| CN103795116A (en) | Power supply change-over and control device, and power supply method and system | |
| CN203026959U (en) | Multifunctional energy storage inversion system | |
| CN202633970U (en) | Distributed power grid system | |
| CN108494023A (en) | A kind of active output control system of photovoltaic plant and method | |
| CN205724935U (en) | A kind of grid-connected photovoltaic system with intelligent power dividing function | |
| CN109599898B (en) | Control method and device for improving consumption of distributed power supply | |
| CN202772602U (en) | Wind power generation system possessing off-grid mode and grid-connected mode |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20210504 |