CN109038688A - A kind of raising Flexible Power Grid control method based on electrical heat-storing device - Google Patents
A kind of raising Flexible Power Grid control method based on electrical heat-storing device Download PDFInfo
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- CN109038688A CN109038688A CN201811036420.XA CN201811036420A CN109038688A CN 109038688 A CN109038688 A CN 109038688A CN 201811036420 A CN201811036420 A CN 201811036420A CN 109038688 A CN109038688 A CN 109038688A
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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
- H02J3/38—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
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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
- H02J3/24—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
- 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]
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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
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E10/00—Energy generation through renewable energy sources
- Y02E10/70—Wind energy
- Y02E10/76—Power conversion electric or electronic aspects
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- Supply And Distribution Of Alternating Current (AREA)
- Charge And Discharge Circuits For Batteries Or The Like (AREA)
Abstract
The present invention proposes that a kind of raising Flexible Power Grid control method based on electrical heat-storing device, process include: to carry out data acquisition to the correlative factor of same day weather condition and the related heat reservoir of heat-storing device；The impact factor for influencing electrical heat-storing device heat storage capacity is calculated；Calculate photovoltaic and wind power station power output influence of fluctuations coefficient；Calculate the electricity support that thermoelectricity unit needed for being fluctuated due to wind-powered electricity generation photovoltaic power generation is provided；Electrical heat-storing device investment or excision capacity are calculated, and is controlled according to calculated result；Calculate Flexible Power Grid property coefficient；The uncertainty that the present invention can contribute according to distributed generation resource in current electric grid, is calculated by reasonable analysis, judges current electric grid running statu, when load is at a low ebb or the spike period, it is controlled by the switching of electric heat accumulation, reinforces the flexibility of power grid, guarantee power grid power supply reliability.
Description
Technical field
The invention belongs to electric power network technique field, a kind of raising Flexible Power Grid control method based on electrical heat-storing device.
Background technique
Strong influence that is continuous grid-connected due to renewable energy power generations such as wind-powered electricity generation photovoltaics, contributing by Changes in weather,
To guarantee flexibility of the safe and stable operation of power grid to power grid, more stringent requirements are proposed, and the peak-valley difference in power grid constantly adds
Greatly, in order to reduce peak-valley difference, alleviate the peak regulation pressure of unit, improve the flexibility of power grid, power grid take electrical heat-storing device with
The renewable energy coordinated operation modes such as power grid apoplexy electric light volt, put into electric heat accumulation in the load valley period, increase negative
The low ebb value of lotus amount raising load.The heat in electric heat accumulation is put into heat supply network at the load peak moment, reduces cogeneration units
Heat supply power output, improve generated output, the flexible spy of power grid is utmostly improved by the cooperation of heat accumulation and generating set
Property.Variation between net load and power supply is followed for how to control electrical heat-storing device, guarantee dissolves wind-powered electricity generation to the full extent
The renewable energy power generations such as photovoltaic, the flexibility for improving power grid have highly important meaning to the following clean electric power system of realization
Justice.
Summary of the invention
The present invention is in the case where being fluctuated according to wind-powered electricity generation photovoltaic renewable energy power generation, by electrical heat-storing device according to traditional heat
The climbing situation of motor group rationally carries out switching, formulates Conventional thermoelectric coproduction unit generation plan.For the maximum spirit for reaching power grid
Characteristic living is detected first against current electric heat accumulation state and wind light generation power, to current net load (load and scene
Power generation the sum of) and it is next scene power output situation judged, so that it is determined that being mentioned at the time of needing switching electrical heat-storing device
The up-regulation ability of Conventional thermoelectric unit and downward ability in high power grid, to improve the flexibility of power grid.
The present invention proposes that a kind of raising Flexible Power Grid control method based on electrical heat-storing device, detailed process include: step
Rapid 1~step 5:
Step 1: the related heat reservoir of correlative factor and heat-storing device to same day weather condition carries out data acquisition:
The correlation factor data of same day weather includes: current environmental temperature cj；Relative air humidity Hj, current wind speed Vf, current light is strong
Spend Sg；The related heat reservoir data of heat-storing device include: electrical heat-storing device Current Temperatures TB；The heat accumulation efficiency of electrical heat-storing device
ηIi；Electrical heat-storing device charging rate VBIi；Electrical heat-storing device exothermal efficiency ηOi；Electrical heat-storing device rate of heat release VBOi；Electric heat accumulation dress
Set middle magnesia brick thermal coefficient εr；The electricity Q that current electrical heat-storing device can dissolveD；The specified consumption electricity Q of electrical heat-storing deviceM；
Step 2: calculating impact factor and influence of fluctuations coefficient, including step 2.1 and step 2.2, step 2.1 and step
2.2 in no particular order sequence:
Step 2.1: to the impact factor A for influencing electrical heat-storing device heat storage capacityiAnd BiIt is calculated:
Current environmental temperature, current light intensity and relative air humidity are calculated to the impact factor of electrical heat-storing device
Ai:
Electrical heat-storing device itself is calculated to the impact factor B of heat-storing devicei, expression formula is as follows:
Step: 2.2: according to current wind speed, intensity of illumination, relative air humidity and environment temperature calculate photovoltaic and wind
Output of power station influence of fluctuations FACTOR Pi, wherein e is constant, lne=1.
Step 3: according to impact factor Ai、BiWith influence of fluctuations FACTOR Pi, calculate heat needed for fluctuating due to wind-powered electricity generation photovoltaic power generation
The electricity that motor group provides supports Q1:
Step 4: carrying out going out the investment of electrical heat-storing device caused by fluctuation or excision calculation of capacity Q as wind-powered electricity generation photovoltaic2, calculate
As a result
The expression that is positive is put into, and the calculated result expression that is negative is cut off.
Step 5: being put into and cut off electrical heat-storing device by control method described in step 4, calculate Flexible Power Grid
Property coefficient QY, i.e., sudden load change situation can should flexibly be coped in power grid, guarantee the safety of power grid, QYBigger table
Show that flexibility is higher；
If QY>=50 indicate that current electric grid flexibility is higher, and power grid can be in generating set power output range according to load need
Power output situation can freely be changed by asking；If QY< 50 indicate that the flexibility of power grid is lower, and power grid cannot change according only to workload demand
Power output situation, it is necessary to carry out rational management according to taking appropriate measures, guarantee the power supply reliability of power grid.
Taking appropriate measures in the step 5 and carrying out rational management includes: to decrease or increase generating set to increase power grid
Peak modulation capacity, and increase energy storage device, improve Flexible Power Grid.
Advantageous effects:
The uncertainty that the present invention can contribute according to distributed generation resource in current electric grid, is calculated by reasonable analysis, is sentenced
Disconnected current electric grid running statu is controlled by the switching of electric heat accumulation when load is at a low ebb or the spike period, reinforces power grid
Flexibility, guarantee power grid power supply reliability.
Detailed description of the invention
Fig. 1 is a kind of raising Flexible Power Grid control method flow chart based on electrical heat-storing device of the embodiment of the present invention；
Fig. 2 is voltage fluctuation situation signal in power grid after the use raising Flexible Power Grid control method of the embodiment of the present invention
Figure；
Specific embodiment
Invention is described further with specific implementation example with reference to the accompanying drawing, the present invention proposes a kind of based on electric heat accumulation
The raising Flexible Power Grid control method of device, as shown in Figure 1, detailed process includes: step 1~step 6, wherein step 2 with
Step 3 in no particular order sequence:
Step 1: the related heat reservoir of correlative factor and heat-storing device to same day weather condition carries out data acquisition:
The correlation factor data of same day weather includes: current environmental temperature cj=35 degrees Celsius；Relative air humidity Hj=46%, currently
Wind speed Vf=6m/s, current light intensity Sg=6000w/h；The related heat reservoir data of heat-storing device include: electrical heat-storing device
Current Temperatures TB=270 DEG C；The heat accumulation efficiency eta of electrical heat-storing deviceIi=95%；Electrical heat-storing device charging rate VBIi=8000kJ/
h；Electrical heat-storing device exothermal efficiency ηOi=99%；Electrical heat-storing device rate of heat release VBOi=7000kJ/h；Magnesia brick in electrical heat-storing device
Thermal coefficient εr=0.98；The electricity Q that current electrical heat-storing device can dissolveD=2000MW.h；The specified consumption electricity of electrical heat-storing device
Measure QM=20000MW.h；
Step 2: calculating impact factor and influence of fluctuations coefficient, including step 2.1 and step 2.2, step 2.1 and step
2.2 in no particular order sequence:
Step 2.1: to the impact factor A for influencing electrical heat-storing device heat storage capacityiAnd BiIt is calculated:
Current environmental temperature cj=35 degrees Celsius, current light intensity Sg=6000w/h and relative air humidity Hj=
46%, calculate the impact factor A to electrical heat-storing devicei:
Solve Ai=39.6；
By electrical heat-storing device Current Temperatures TB=270 DEG C, electrical heat-storing device exothermal efficiency ηOi=99%, electrical heat-storing device
Heat accumulation efficiency etaIi=95%, magnesia brick thermal coefficient ε in electrical heat-storing devicer=0.98 substitutes into following formula, calculates electrical heat-storing device itself
To the impact factor B of heat-storing devicei, expression formula is as follows:
Solve Bi=46.79；
Step 2.2: being c by current environmental temperaturej=35 degrees Celsius；Relative air humidity Hj=46%, current wind speed Vf=
6m/s, current light intensity Sg=6000w/h substitutes into following formula, calculates photovoltaic and wind power station power output influence of fluctuations coefficient, wherein
E is constant, lne=1:
Solve Pi=21.47；
Step 3: by Ai=39.6, Bi=46.79, Pi=21.47 electrical heat-storing device charging rate VBIi=8000kJ/h, electricity
Heat-storing device rate of heat release VBOi=7000kJ/h substitutes into following formula, calculates thermoelectricity unit needed for fluctuating due to wind-powered electricity generation photovoltaic power generation and mentions
The electricity of confession, which supports, to be calculated:
Solve Q1=67MW；
Step 4: by the specified consumption electricity Q of electrical heat-storing deviceM=20000MW.h substitutes into following formula, and progress is gone out by wind-powered electricity generation photovoltaic
Reeb
The investment of electrical heat-storing device caused by dynamic or excision calculation of capacity, the calculated result expression that is positive are put into, and knot is calculated
Fruit is negative
Expression is cut off:
Q2=27MW；
Step 5: being put into and cut off electrical heat-storing device, A by control method described in step 4i=39.6, Bi=
46.79 Q1=67MW, Q2=27MW substitutes into following formula, calculates Flexible Power Grid property coefficient QY, i.e., sudden load change can be coped in power grid
Situation can be coped with flexibly, guarantee the safety of power grid, QYBigger expression flexibility is higher；
If QY>=50 indicate that current electric grid flexibility is higher, and power grid can be in generating set power output range according to load need
Power output situation can freely be changed by asking；
If QY< 50 indicate that the flexibility of power grid is lower, it is necessary to carry out rational management according to taking appropriate measures, guarantee electricity
The power supply reliability of net.
Solve QY=79；
By being calculated above it can be concluded that current electric grid flexibility is higher.
After adopting said method in power grid voltage fluctuation situation as shown in Fig. 2, abscissa indicates the time from 0:00~24 in figure:
00 moment, ordinate indicate voltage per unit value, as can be seen from the figure: using control method of the present invention and without using the present invention
Control method comparison is significantly improved, it was demonstrated that control method of the present invention has using the stability of voltage after present invention control
Effect property.
Claims (2)
1. a kind of raising Flexible Power Grid control method based on electrical heat-storing device, which is characterized in that detailed process includes:
Step 1: the related heat reservoir of correlative factor and heat-storing device to same day weather condition carries out data acquisition: the same day
The correlation factor data of weather includes: current environmental temperature cj；Relative air humidity Hj, current wind speed Vf, current light intensity
Sg；The related heat reservoir data of heat-storing device include: electrical heat-storing device Current Temperatures TB；The heat accumulation efficiency of electrical heat-storing device
ηIi；Electrical heat-storing device charging rate VBIi；Electrical heat-storing device exothermal efficiency ηOi；Electrical heat-storing device rate of heat release VBOi；Electric heat accumulation dress
Set middle magnesia brick thermal coefficient εr；The electricity Q that current electrical heat-storing device can dissolveD；The specified consumption electricity Q of electrical heat-storing deviceM；
Step 2: calculating impact factor and influence of fluctuations coefficient, including step 2.1 and step 2.2, step 2.1 and step 2.2 are not
Successively sequentially:
Step 2.1: to the impact factor A for influencing electrical heat-storing device heat storage capacityiAnd BiIt is calculated:
Current environmental temperature, current light intensity and relative air humidity are calculated to the impact factor A of electrical heat-storing devicei:
Electrical heat-storing device itself is calculated to the impact factor B of heat-storing devicei, expression formula is as follows:
Step 2.2: according to current wind speed, intensity of illumination, relative air humidity and environment temperature, calculate photovoltaic and wind power station goes out
Fluctuation influences FACTOR Pi, wherein e be constant, lne=1:
Step 3: according to impact factor Ai、BiWith influence of fluctuations FACTOR Pi, calculate thermoelectric perpetual motion machine needed for fluctuating due to wind-powered electricity generation photovoltaic power generation
The electricity that group provides supports Q1:
Step 4: calculating electrical heat-storing device investment or excision capacity, and controlled according to calculated result: being contributed by wind-powered electricity generation photovoltaic
The investment of electrical heat-storing device caused by fluctuating or excision capacity Q2It calculates:
The calculated result expression that is positive is put into, and the calculated result expression that is negative is cut off；
Step 5: being put into and cut off electrical heat-storing device by control method described in step 4, calculate Flexible Power Grid system
Number QY,
If QY>=50 power grids freely change power output situation according to workload demand in generating set power output range；If QY< 50 power grids are not
Power output situation can be changed according only to workload demand, it is necessary to carry out rational management according to taking appropriate measures, guarantee the confession of power grid
Electric reliability.
2. a kind of raising Flexible Power Grid control method based on electrical heat-storing device according to claim 1, which is characterized in that described
Taking appropriate measures in step 5 and carrying out rational management includes: the peak modulation capacity for decreasing or increasing generating set and increasing power grid, with
And increase energy storage device.
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN111125971A (en) * | 2019-12-26 | 2020-05-08 | 北京航空航天大学 | Method for determining thrust uncertainty of air-breathing hypersonic aircraft |
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| US20160072289A1 (en) * | 2012-02-16 | 2016-03-10 | Spyros James Lazaris | Dynamic demand response in a renewable energy-based electricity grid infrastructure |
| CN105375479A (en) * | 2015-12-14 | 2016-03-02 | 东南大学 | Model predicative control based energy management method of distributed energy resource system |
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Application publication date: 20181218 |