CN109462250A - A kind of combined scheduling method of photoelectricity thermoelectricity and storage capacitor - Google Patents
A kind of combined scheduling method of photoelectricity thermoelectricity and storage capacitor Download PDFInfo
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- 238000004146 energy storage Methods 0.000 claims abstract description 41
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06Q—INFORMATION AND COMMUNICATION TECHNOLOGY [ICT] SPECIALLY ADAPTED FOR ADMINISTRATIVE, COMMERCIAL, FINANCIAL, MANAGERIAL OR SUPERVISORY PURPOSES; SYSTEMS OR METHODS SPECIALLY ADAPTED FOR ADMINISTRATIVE, COMMERCIAL, FINANCIAL, MANAGERIAL OR SUPERVISORY PURPOSES, NOT OTHERWISE PROVIDED FOR
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- H—ELECTRICITY
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- 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
- H02J3/24—Arrangements for preventing or reducing oscillations of power in networks
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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
- H02J3/00—Circuit arrangements for ac mains or ac distribution networks
- H02J3/28—Arrangements for balancing of the load in a network by storage of energy
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- Y02E70/00—Other energy conversion or management systems reducing GHG emissions
- Y02E70/30—Systems combining energy storage with energy generation of non-fossil origin
Abstract
The present invention relates to flare up to store up combined dispatching technical field, more particularly to a kind of photoelectricity thermoelectricity and the combined scheduling method of storage capacitor, storage capacitor is connect by special circuit with several optical electric fields, storage capacitor passes through grid-connected inverters, storage capacitor is several capacitors composition, the mutually indepedent charging and discharging of several capacitors, comprising the following steps: A) it is that upper threshold value and lower threshold value is arranged in storage capacitor energy storage capacity；B) when storage capacitor energy storage capacity is higher than upper threshold value, storage capacitor works in discharge mode；C) when storage capacitor energy storage capacity is lower than lower threshold value, storage capacitor works in charge mode；D) when storage capacitor energy storage capacity is between upper threshold value and lower threshold value, storage capacitor operating mode is arranged according to electric network state, circulation executes step B-D.The beneficial effects of the present invention are: accessing storage capacitor and photovoltaic electric power coordinated scheduling in distribution, the ability that distribution offsets the ability of photovoltaic electric power fluctuation and improves distribution consumption photovoltaic electric power is improved.
Description
Technical field
The present invention relates to flare up to store up combined dispatching technical field, and in particular to the joint of a kind of photoelectricity thermoelectricity and storage capacitor
Dispatching method.
Background technique
As global warming bring climatic issues are got worse, " the low-carbon revolution " of globalization is come into being, " low
Energy consumption, low pollution, low emission " become the core of energy source use.Solar energy is as inexhaustible, nexhaustible, pollution-free, cheap
The energy, rapidly become the new lover of utilization of new energy resources.Solar energy roof is one of the important way of solar energy power generating application.
To implement the target for energy-saving and emission-reduction that China promises to undertake the world, reinforces support on policy new energy economic strategy, accelerate to promote solar energy
Application of the photoelectric technology in urban and rural buildings field, relevant ministries and commissions, China release solar roof project.Solar energy roof be exactly
Device of solar generating is installed at the top of house, is generated electricity using solar energy power technology in urban and rural buildings field, to reach section
It can emission reduction targets.But photovoltaic power generation power output level has the characteristics that random fluctuation, occurs connecing in resident's distribution in practice
The problem of entering a large amount of photovoltaic power generation equipments and grid power quality caused to decline, while in order to offset the random of photovoltaic power generation power output
Fluctuation, leads to fired power generating unit energy consumption and cost increase.Photovoltaic power generation bring benefit is reduced, while also at current limitation light
One of the main resistance that volt power generation further develops.Photovoltaic power generation almost is implemented to change with intensity of illumination, without inertia and buffering.
And capacitive energy storage has energy storage and electric discharge rapidly, and energy storage is sensitive, is suitble to be used in combination with photovoltaic power generation, co-ordination, part
Offset the fluctuation that photoelectricity goes out activity of force.
Chinese patent CN103455729B, publication date on March 8th, 2017, a kind of determining photovoltaic-and-enegrid-connected grid-connected combined power generation dispatch
The method of value, step have one, obtain the distribution of photovoltaic power generation output forecasting error according to the historical data of photovoltaic power generation output forecasting error amount
Characteristic；Two, it predicts to obtain photovoltaic power generation output forecasting value by photovoltaic predicting subsystem；Three, it is distributed according to photovoltaic power generation output forecasting error
Characteristic and photovoltaic power generation output forecasting value utilize LHS (Latin Hypercube Sampling technology) to obtain several photovoltaics power output scene；Four, it utilizes
Limited photovoltaic under the conditions of obtaining different probability after photovoltaic power output scene abatement is gone out the field of force by SR technology (scene reduction technology)
Scape；Five, data are calculated based on limited photovoltaic power output scene, passes through light storing cogeneration economic load dispatching computation model meter
Calculation obtains photovoltaic-and-enegrid-connected grid-connected combined power generation dispatch value.With providing effective solution way to solve more scene uncertain problems
The beneficial effect of cost of electricity-generating can be effectively reduced in diameter.Its effect that can play certain prediction photoelectricity power output, but there is no essence
The bounce amplitude for changing photoelectricity power output can not reduce photoelectricity consumption cost accordingly and improve photoelectricity consumption total amount.
Summary of the invention
The technical problem to be solved by the present invention is resident's distribution at present to the digestion capability deficiency of distributed photovoltaic electric power and
The problem of photoelectricity goes out the scarce capacity of fluctuation, is offset in distribution.Propose it is a kind of by storage capacitor access distribution can be with photovoltaic electric
The ability for improving distribution consumption photovoltaic electric power of power coordinated scheduling and offset photovoltaic electric power fluctuation ability a kind of photoelectricity thermoelectricity and
The combined scheduling method of storage capacitor.
In order to solve the above technical problems, the technical solution used in the present invention are as follows: a kind of photoelectricity thermoelectricity and storage capacitor
Combined scheduling method, storage capacitor are connect by special circuit with several optical electric fields, and the storage capacitor passes through inverter simultaneously
Net, the storage capacitor are several capacitors composition, the mutually indepedent charging and discharging of several capacitors, including following step
It is rapid: A) it is that upper threshold value and lower threshold value is arranged in storage capacitor energy storage capacity；B) when storage capacitor energy storage capacity is higher than upper threshold value, energy storage electricity
Hold work in discharge mode, participate in combined dispatching for storage capacitor as controllable electric power at this time, until storage capacitor energy storage capacity is low
In upper threshold value；C) when storage capacitor energy storage capacity is lower than lower threshold value, storage capacitor work in charge mode, using storage capacitor as
Controllable load participates in combined dispatching, until storage capacitor energy storage capacity is higher than lower threshold value；D) when storage capacitor energy storage capacity is in upper-level threshold
Value lower threshold value between when, according to electric network state be arranged storage capacitor operating mode, according to electric network state using storage capacitor as
Controllable electric power or controllable load participate in combined dispatching, and circulation executes step B-D.
Preferably, participating in the method for combined dispatching the following steps are included: B1 for storage capacitor as controllable electric power) with storage
The half of energy capacitor maximum discharge power is as initial discharge power；B2 the voltage peak of the accessed power grid of storage capacitor) is detected,
When network voltage peak value is higher than standard value and continues the t1 time, storage capacitor discharge power is reduced, when detecting network voltage
When peak value is equal to or less than standard value, storage capacitor discharge power is improved to initial discharge power；B3) when network voltage peak value is low
When standard value, storage capacitor discharge power is improved, when detecting that network voltage peak value is equal to or higher than standard value, reduces storage
Can capacitor discharge power to initial discharge power.
Preferably, participating in the method for combined dispatching the following steps are included: C1 for storage capacitor as controllable load) with storage
The half of energy capacitor maximum charge power is as initial charge power；C2 the voltage peak of the accessed power grid of storage capacitor) is detected,
When network voltage peak value is higher than standard value and continues the t1 time, storage capacitor charge power is improved, when detecting network voltage
When peak value is equal to or less than standard value, storage capacitor charge power is reduced to initial charge power；C3) when network voltage peak value is low
When standard value, storage capacitor charge power is reduced, when detecting that network voltage peak value is equal to or higher than standard value, improves storage
Can capacitor charging power to initial discharge power.
Preferably, it is described when storage capacitor energy storage capacity is between upper threshold value and lower threshold value, it is set according to electric network state
Storage capacitor operating mode is set, combined dispatching is participated in for storage capacitor as controllable electric power or controllable load according to electric network state
Method is the following steps are included: D1) voltage peak of detection the accessed power grid of storage capacitor, when network voltage peak value is higher than standard value
And when continuing the t1 time, setting storage capacitor is charge mode, participates in combined dispatching for storage capacitor as controllable load, and hold
Row step D3；D2) when network voltage peak value be lower than standard value when, setting storage capacitor be discharge mode, using storage capacitor as
Controllable electric power participates in combined dispatching；D3) circulation executes step D1-D3 until storage capacitor energy storage capacity is higher than upper threshold value or under being lower than
Threshold value.
Preferably, the storage capacitor capacity Q, storage capacitor energy storage capacity upper threshold value QHWith lower threshold value QLMeet: QHWith
The value of 95%*Q is suitable, and the value of Pmax*T0 and 5%*Q is close, and Pmax is optical electric field history maximum output power, the value of T0
Range is 2 minutes~5 minutes, and optical electric field light-intensity variation is small, and T0 takes large values；QL> η * σ * T0, η ∈ [1.1,2.1], σ are photoelectricity
Field history goes out activity of force with 5 minutes standard deviations for the data after time interval sampling.
Preferably, the method for reducing storage capacitor discharge power are as follows: raising speed on network voltage peak value in the calculating t1 time
Rate △ P is obtained from control centre and is loaded climbing speed △ W in the t1 time, reduces storage capacitor discharge power with rate △ S,
Middle △ S=| △ P- △ W |, △ P takes negative value if network voltage peak value reduces, and takes if being supported in the t1 time for decline △ W
Negative value.
Preferably, the method for improving storage capacitor charge power are as follows: raising speed on network voltage peak value in the calculating t1 time
Rate △ P, if △ P≤3.5%*G (kv/s) or △ P≤70%* △ Wmax, improves storage capacitor charge power and fill for maximum
The 75% of electrical power, if △ P > 3.5%*G (kv/s) and △ P > 70%* △ Wmax, improving storage capacitor charge power is most
Big charge power, wherein G is accessed the standard value of the voltage peak of power grid by storage capacitor, and △ Wmax is that fired power generating unit maximum is climbed
Slope rate.
Substantial effect of the invention is: by accessing storage capacitor in distribution and coordinating to adjust with distributed photovoltaic electric power
Degree can be improved the ability that distribution offsets the ability of photovoltaic electric power fluctuation and improves distribution consumption photovoltaic electric power.
Detailed description of the invention
Fig. 1 is Distributing network structure figure.
Fig. 2 is that flare up stores up combined scheduling method flow diagram.
Wherein: 100, thermal power plant, 200, distribution line, 300, optical electric field, 400, special circuit, 500, storage capacitor.
Specific embodiment
Below by specific embodiment, and in conjunction with attached drawing, a specific embodiment of the invention is further described in detail.
As shown in Figure 1, being Distributing network structure figure, there are several photovoltaic DC fields, at least one storage capacitor in power distribution network
500 and at least one thermal power plant 100, thermal power plant 100 is thermal power plant 100 in this distribution or the thermoelectricity accessed by higher level's power grid
Factory 100, storage capacitor 500 are connect by special circuit 400 with several optical electric fields 300, and storage capacitor 500 is connected by inverter
Distribution line 200 is connect, storage capacitor 500 is several capacitors composition, the mutually indepedent charging and discharging of several capacitors, energy storage electricity
The control for holding 500 charge and discharge scheduled center, applied to the photoelectricity thermoelectricity of the power distribution network and the combined dispatching of storage capacitor 500
Method flow block diagram is as shown in Figure 2, comprising the following steps: A) it is that upper threshold value and lower threshold value is arranged in 500 energy storage capacity of storage capacitor；B)
When 500 energy storage capacity of storage capacitor is higher than upper threshold value, storage capacitor 500 works in discharge mode, at this time makees storage capacitor 500
Combined dispatching is participated in for controllable electric power, until 500 energy storage capacity of storage capacitor is lower than upper threshold value；C) when 500 energy storage capacity of storage capacitor
When lower than lower threshold value, the work of storage capacitor 500 participates in combined dispatching as controllable load in charge mode, by storage capacitor 500,
Until 500 energy storage capacity of storage capacitor is higher than lower threshold value；D) when 500 energy storage capacity of storage capacitor is between upper threshold value and lower threshold value
When, 500 operating mode of storage capacitor is arranged according to electric network state, controllable electric power is regard storage capacitor 500 as according to electric network state
Or controllable load participates in combined dispatching, circulation executes step B-D.
Storage capacitor 500 is participated in into the method for combined dispatching the following steps are included: B1 as controllable electric power) with storage capacitor
The half of 500 maximum discharge powers is as initial discharge power；B2 the voltage peak of the accessed power grid of storage capacitor 500) is detected,
When network voltage peak value be higher than standard value and continue the t1 time when, reduce by 500 discharge power of storage capacitor, when detect power grid electricity
When voltage crest value is equal to or less than standard value, 500 discharge power of storage capacitor is improved to initial discharge power；B3) work as network voltage
Peak value be lower than standard value when, improve 500 discharge power of storage capacitor, when detect network voltage peak value be equal to or higher than standard value
When, 500 discharge power of storage capacitor is reduced to initial discharge power.
Storage capacitor 500 is participated in into the method for combined dispatching the following steps are included: C1 as controllable load) with storage capacitor
The half of 500 maximum charge powers is as initial charge power；C2 the voltage peak of the accessed power grid of storage capacitor 500) is detected,
When network voltage peak value be higher than standard value and continue the t1 time when, improve 500 charge power of storage capacitor, when detect power grid electricity
When voltage crest value is equal to or less than standard value, 500 charge power of storage capacitor is reduced to initial charge power；C3) work as network voltage
Peak value be lower than standard value when, reduce by 500 charge power of storage capacitor, when detect network voltage peak value be equal to or higher than standard value
When, 500 charge power of storage capacitor is improved to initial discharge power.
When 500 energy storage capacity of storage capacitor is between upper threshold value and lower threshold value, storage capacitor is arranged according to electric network state
500 operating modes, the method that storage capacitor 500 is participated in as controllable electric power or controllable load by combined dispatching according to electric network state
The following steps are included: D1) voltage peak of the detection access power grid of storage capacitor 500, when network voltage peak value is higher than standard value
And when continuing the t1 time, setting storage capacitor 500 is charge mode, and storage capacitor 500 is participated in joint as controllable load and is adjusted
Degree, and execute step D3；D2) when network voltage peak value is lower than standard value, setting storage capacitor 500 is discharge mode, will be stored up
Energy capacitor 500 participates in combined dispatching as controllable electric power；D3) circulation executes step D1-D3 until 500 energy storage capacity of storage capacitor is high
In upper threshold value or it is lower than lower threshold value.
500 capacity Q of storage capacitor, storage capacitor 500 energy storage capacity upper threshold value QH and lower threshold value QL meet: QH's and 95%*Q
Value is suitable, and the value of Pmax*T0 and 5%*Q is close, and Pmax is 300 history maximum output power of optical electric field, the value range of T0
It is 2 minutes~5 minutes, 300 light-intensity variation of optical electric field is small, and T0 takes large values；QL > η * σ * T0, η ∈ [1.1,2.1], σ are optical electric field
300 history go out activity of force with 5 minutes standard deviations for the data after time interval sampling.
The method for improving 500 charge power of storage capacitor are as follows: network voltage peak value climbing speed △ P in the t1 time is calculated,
If △ P≤3.5%*G (kv/s) or △ P≤70%* △ Wmax, improving 500 charge power of storage capacitor is maximum charge
The 75% of power, if △ P > 3.5%*G (kv/s) and △ P > 70%* △ Wmax, improving 500 charge power of storage capacitor is most
Big charge power, wherein G by storage capacitor 500 access power grid voltage peak standard value, △ Wmax be fired power generating unit most
Big creep speed.
Above-mentioned embodiment is only a preferred solution of the present invention, not the present invention is made in any form
Limitation, there are also other variations and modifications on the premise of not exceeding the technical scheme recorded in the claims.
Claims (9)
1. the combined scheduling method of a kind of photoelectricity thermoelectricity and storage capacitor, which is characterized in that
Storage capacitor is connect by special circuit with several optical electric fields, and the storage capacitor passes through grid-connected inverters, the storage
Energy capacitor is several capacitors composition, the mutually indepedent charging and discharging of several capacitors, comprising the following steps:
A upper threshold value and lower threshold value) are set for storage capacitor energy storage capacity；
B) when storage capacitor energy storage capacity is higher than upper threshold value, storage capacitor work is in discharge mode, using storage capacitor as controllable
Power supply participates in combined dispatching, until storage capacitor energy storage capacity is lower than upper threshold value；
C) when storage capacitor energy storage capacity is lower than lower threshold value, storage capacitor work is in charge mode, using storage capacitor as controllable
Load participates in combined dispatching, until storage capacitor energy storage capacity is higher than lower threshold value；
D) when storage capacitor energy storage capacity is between upper threshold value and lower threshold value, storage capacitor Working mould is arranged according to electric network state
Formula participates in combined dispatching for storage capacitor as controllable electric power or controllable load according to electric network state, and circulation executes step B-D.
2. the combined scheduling method of a kind of photoelectricity thermoelectricity according to claim 1 and storage capacitor, which is characterized in that
Using storage capacitor as controllable electric power participate in combined dispatching method the following steps are included:
B1) storage capacitor is to set initial discharge power discharge；
B2 the voltage peak for) detecting the accessed power grid of storage capacitor, when network voltage peak value is higher than standard value and persistently rises t1
When the time, storage capacitor discharge power is reduced, when detecting that network voltage peak value is equal to or less than standard value, improves energy storage electricity
Electrical power is received to initial discharge power；
B3) when network voltage peak value is lower than standard value, storage capacitor discharge power is improved, when detecting network voltage peak value etc.
When standard value, storage capacitor discharge power is reduced to initial discharge power.
3. the combined scheduling method of a kind of photoelectricity thermoelectricity according to claim 1 or 2 and storage capacitor, which is characterized in that
Using storage capacitor as controllable load participate in combined dispatching method the following steps are included:
C1) storage capacitor is to set the charging of initial charge power；
C2 the voltage peak for) detecting the accessed power grid of storage capacitor, when network voltage peak value is higher than standard value and persistently rises t1
When the time, storage capacitor charge power is improved, when detecting that network voltage peak value is equal to or less than standard value, reduces energy storage electricity
Capacity charge power is to initial charge power；
C3) when network voltage peak value is lower than standard value, storage capacitor charge power is reduced, when detecting network voltage peak value etc.
When standard value, storage capacitor charge power is improved to initial discharge power.
4. the combined scheduling method of a kind of photoelectricity thermoelectricity according to claim 1 or 2 and storage capacitor, which is characterized in that
It is described when storage capacitor energy storage capacity be between upper threshold value and lower threshold value when, according to electric network state be arranged storage capacitor work
The method that storage capacitor participates in combined dispatching as controllable electric power or controllable load is included following step according to electric network state by mode
It is rapid:
D1 the voltage peak for) detecting the accessed power grid of storage capacitor, when network voltage peak value is higher than standard value and continues the t1 time
When, setting storage capacitor is charge mode, participates in combined dispatching for storage capacitor as controllable load, and execute step D3；
D2) when network voltage peak value is lower than standard value, setting storage capacitor is discharge mode, using storage capacitor as controllable electric
Source participates in combined dispatching；
D3 the operating mode t2 time of storage capacitor) is maintained, then circulation executes step D1-D3 until storage capacitor energy storage capacity is high
In upper threshold value or it is lower than lower threshold value.
5. the combined scheduling method of a kind of photoelectricity thermoelectricity according to claim 3 and storage capacitor, which is characterized in that
It is described when storage capacitor energy storage capacity be between upper threshold value and lower threshold value when, according to electric network state be arranged storage capacitor work
The method that storage capacitor participates in combined dispatching as controllable electric power or controllable load is included following step according to electric network state by mode
It is rapid:
D1 the voltage peak for) detecting the accessed power grid of storage capacitor, when network voltage peak value is higher than standard value and continues the t1 time
When, setting storage capacitor is charge mode, participates in combined dispatching for storage capacitor as controllable load, and execute step D3；
D2) when network voltage peak value is lower than standard value, setting storage capacitor is discharge mode, using storage capacitor as controllable electric
Source participates in combined dispatching；
D3) circulation executes step D1-D3 until storage capacitor energy storage capacity is higher than upper threshold value or is lower than lower threshold value.
6. the combined scheduling method of a kind of photoelectricity thermoelectricity according to claim 1 or 2 and storage capacitor, which is characterized in that
The storage capacitor capacity Q, storage capacitor energy storage capacity upper threshold value QHWith lower threshold value QLMeet:
QHIt is suitable with the value of 95%*Q, and the value of Pmax*T0 and 5%*Q is close, Pmax is optical electric field history maximum output power,
The value range of T0 is 2 minutes~5 minutes；
QL> η * σ * T0, η ∈ [1.1,2.1], σ are that optical electric field history goes out activity of force to be within 5 minutes the data after time interval sampling
Standard deviation.
7. the combined scheduling method of a kind of photoelectricity thermoelectricity according to claim 3 and storage capacitor, which is characterized in that
The storage capacitor capacity Q, storage capacitor energy storage capacity upper threshold value QHWith lower threshold value QLMeet:
QHIt is suitable with the value of 95%*Q, and the value of Pmax*T0 and 5%*Q is close, Pmax is optical electric field history maximum output power,
The value range of T0 is 2 minutes~5 minutes；
QL> η * σ * T0, η ∈ [1.1,2.1], σ are that optical electric field history goes out activity of force to be within 5 minutes the data after time interval sampling
Standard deviation.
8. the combined scheduling method of a kind of photoelectricity thermoelectricity according to claim 2 and storage capacitor, which is characterized in that
The method for reducing storage capacitor discharge power are as follows: network voltage peak value climbing speed △ P in the t1 time is calculated, from scheduling
The heart, which obtains, loads climbing speed △ W in the t1 time, reduce storage capacitor discharge power with rate △ S, wherein △ S=| △ P- △ W
|, △ P takes negative value if network voltage peak value reduces, and takes negative value if being supported in the t1 time for decline △ W.
9. the combined scheduling method of a kind of photoelectricity thermoelectricity according to claim 3 and storage capacitor, which is characterized in that improve
The method of storage capacitor charge power are as follows: network voltage peak value climbing speed △ P in the t1 time is calculated, if △ P≤3.5%*G
(kv/s) or △ P≤70%* △ Wmax 75% that storage capacitor charge power is maximum charge power, is then improved, if △ P >
3.5%*G (kv/s) and △ P > 70%* △ Wmax, then improving storage capacitor charge power is maximum charge power, and wherein G is storage
The standard value of the voltage peak of energy the accessed power grid of capacitor, △ Wmax are fired power generating unit maximum creep speed.
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN110492500A (en) * | 2019-09-11 | 2019-11-22 | 内蒙古电力(集团)有限责任公司内蒙古电力科学研究院分公司 | A kind of load dispatching method, device, electronic equipment and storage medium |
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