CN101707378A - Method for dispatching power grid pitch peak capability based on large-scale wind power sychronization - Google Patents
Method for dispatching power grid pitch peak capability based on large-scale wind power sychronization Download PDFInfo
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- CN101707378A CN101707378A CN200910219122A CN200910219122A CN101707378A CN 101707378 A CN101707378 A CN 101707378A CN 200910219122 A CN200910219122 A CN 200910219122A CN 200910219122 A CN200910219122 A CN 200910219122A CN 101707378 A CN101707378 A CN 101707378A
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Abstract
The invention relates to the field of planning and dispatching of a power grid, and discloses a method for dispatching power grid pitch peak capability based on large-scale wind power sychronization. The method comprises the following steps: (1) setting the pitch peak capacity provided by hydropower for wind power as F, and the sum of wind power and hydropower as a definite value, F plus Q; leading Wa plus Wi to be more than or equal to (F plus Q) multiplied by 24, conducting pilot calculation on maximum output Fa of wind power allowed by the power grid; (2) substituting Fa into an analog computation model run by a given power grid system, carrying out calculation to obtain load rate of fire power with a light load and a difference F fire between fire power output and fire power minimum output under the load rate, which are taken as the pitch peak capacity provided by the fire power for wind power; and (3) when F fire is less than 0, decreasing wind power output Fa value capable of being balanced by hydropower, and repeating the step (2) until F fire is more than or equal to 0, thus obtaining the total pitch peak capacity provided by the given power grid system for wind power: total F equals to Fa plus F fire, wherein total F is wind power capacity capable of being integrated into the given power grid system.
Description
Technical field
The present invention relates to Electric Power Network Planning and management and running field, particularly a kind of dispatching method of the peak load regulation network ability that is incorporated into the power networks based on large-scale wind power.
Background technology
NORTHWEST CHINA area wind energy aboundresources, landform good wind energy turbine set smooth, that have a good transport service, do not have destructive wind speed is many, and the wind-powered electricity generation installed capacity progressively increases.In order to keep the normal operation of electric power system, when wind-electricity integration moves, must be its meritorious adjustings that afford redress of exerting oneself by other conventional power generation usage mode, power load is continued, reliably, power safely guaranteeing.Yet, to compare with generation modes such as the hydroelectric power generation of routine, thermal power generation, the most basic difference of wind power generation is that its meritorious exerting oneself exists intermittent, randomness and uncontrollability.Thisly can regard as negative load fluctuation is followed the tracks of, promptly to " peak regulation " of wind-powered electricity generation the meritorious compensated regulation of exerting oneself of wind-powered electricity generation.In addition, because the uncertainty of wind-powered electricity generation, the peak that its required electrical network provides is basic suitable with installed capacity.
After the wind-electricity integration, the reserve capacity in the electrical network need increase the capacity that is used for wind-powered peak regulation.Grid connected wind power surpasses electrical network and can be " peak regulation " limit that wind-powered electricity generation provides, and with regard to meaning that electrical network is difficult to the randomness that the balance wind-powered electricity generation exerts oneself and brings meritorious fluctuation, causes the mains frequency frequent variations, gives power grid security, reliable bringing on a disaster property of power supply consequence.Therefore, the peak load regulation network ability after the research large-scale wind power is incorporated into the power networks, significant for instructing wind-powered electricity generation to develop, guarantee fully to purchase wind-powered electricity generation in order.
Summary of the invention
The object of the present invention is to provide a kind of dispatching method of the peak load regulation network ability that is incorporated into the power networks based on large-scale wind power, can be according to the water power parameter of given electrical network, the wind-powered electricity generation capacity that rational management is incorporated into the power networks, the randomness that the balance wind-powered electricity generation is exerted oneself bring meritorious fluctuation, ensure power grid security, reliable power supply.
In order to achieve the above object, the present invention is achieved by the following technical solutions.
A kind of dispatching method of the peak load regulation network ability that is incorporated into the power networks based on large-scale wind power is characterized in that, may further comprise the steps:
(1) water power of gathering given network system forces the Q that exerts oneself, water power average output P, water power to envision exert oneself Y and per day water power electric weight W
a, per day wind-powered electricity generation electric weight W
i, per day wind-powered electricity generation utilizes hourage H, and the peak of setting water power and providing for wind-powered electricity generation is that F, wind-powered electricity generation and the water power sum of exerting oneself is definite value F+Q, makes W
a+ W
i〉=(F+Q) * 24, the minimum admittance of the wind-powered electricity generation electric weight that can get network system is W
Imin=(F+Q-P) * 24, the maximum admittance of wind-powered electricity generation electric weight is W
Imax=(Y-P) * 24;
Work as W
Imin≤ W
i≤ W
ImaxThe time, but the wind-powered electricity generation of water power balance is exerted oneself and is F
a=F;
Work as W
i〉=W
IminAnd W
i＞W
ImaxThe time, but the wind-powered electricity generation of water power balance is exerted oneself and is F
a=((Y-P) * 24)/H;
Work as W
i＜W
Imin≤ W
ImaxThe time, but the wind-powered electricity generation of water power balance is exerted oneself and is F
a=((P-Q) * 24)/(24-H);
(2) wind-powered electricity generation is exerted oneself F
aThe analog computation model of the given network system of substitution operation calculates the load factor of thermoelectricity under the little mode and the difference F fire between the thermoelectricity under this load factor is exerted oneself and the thermoelectricity minimum technology is exerted oneself, and can be the peak that wind-powered electricity generation provides as thermoelectricity;
(3) work as F
Fire＜0 o'clock, the F but the wind-powered electricity generation that reduces the water power balance is exerted oneself
aValue, repeating step (2) is up to F
Fire〉=0, obtain total peak F that given network system provides for wind-powered electricity generation this moment
Always=F
a+ F
Fire, F
AlwaysBe the wind-powered electricity generation electric weight that can incorporate given network system into.
The wind-powered electricity generation process of exerting oneself has the characteristics of randomness, intermittence and uncontrollability, but the quantity of electricity of wind-powered electricity generation presents certain corresponding relation.Weather station observation data and anemometer tower short-term monitoring for many years all shows, the wind-resources characteristics are the increases along with wind speed, the frequency that occurs reduces, corresponding to exert oneself relation with electric weight of wind-powered electricity generation, it is big more to be exactly that wind-powered electricity generation is exerted oneself, its electric weight constitutes more little, and most electric weight of wind-powered electricity generation are added up by the pairing little electric power of little wind speed and form.
Similar to wind-powered electricity generation, the runoff of water power comes water also to have randomicity characteristics, but can be adjusted by reservoir with regulating power, make the reservoir letdown flow be tending towards controlled, even exerting oneself of hydroelectric station is tending towards controlled, the peak modulation capacity in hydroelectric station depends on the operation of its reservoir and the available unit capacity in power station, and the factor of decision hydroelectric station peak modulation capacity has 3, and forcing of hydroelectric station exerted oneself, envisioned and exert oneself and average output.
The present invention mainly utilizes water power to exert oneself, wind-powered electricity generation is exerted oneself characteristics, with the water power is main for wind-powered electricity generation provides peak, and takes into account thermoelectricity, rational management wind-electricity integration capacity, the randomness that the balance wind-powered electricity generation is exerted oneself is brought meritorious fluctuation, ensures the safe operation and reliable power supply of whole given electrical network.
Description of drawings
Below in conjunction with the drawings and specific embodiments the present invention is described in further detail.
Fig. 1 is the typical wind-powered electricity generation procedure chart of exerting oneself;
Fig. 2 is exert oneself associated diagram with electric weight of the wind-powered electricity generation in wind-powered electricity generation base, Jiuquan;
Fig. 3 is exert oneself related schematic diagram with electric weight of water power;
Fig. 4 is W
Imin≤ W
i≤ W
ImaxThe time, the schematic diagram but the wind-powered electricity generation of water power balance is exerted oneself;
Fig. 5 is W
i〉=W
IminAnd W
i＞W
ImaxThe time, the schematic diagram but the wind-powered electricity generation of water power balance is exerted oneself;
Fig. 6 is W
i＜W
Imin≤ W
ImaxThe time, the schematic diagram but the wind-powered electricity generation of water power balance is exerted oneself.
Embodiment
With reference to Fig. 1, the wind-powered electricity generation power producing characteristics is described.The wind-powered electricity generation process of exerting oneself has the characteristics of randomness, intermittent and uncontrollability, and wind-powered electricity generation is exerted oneself and is f, and then the variation of f is irregular, can suppose one day the wind-powered electricity generation power curve as shown in Figure 1, column is represented the wind-powered electricity generation electric weight in the moment, wind-powered electricity generation day electric weight
The wind-powered electricity generation relation with electric weight of exerting oneself, but can be used for determining the wind-powered electricity generation electric power of electrical network balance.
With reference to Fig. 2, be exert oneself associated diagram with electric weight of the wind-powered electricity generation in wind-powered electricity generation base, Jiuquan.Studies show that by service data wind-powered electricity generation base, Jiuquan operation wind energy turbine set, the quantity of electricity of wind-powered electricity generation presents certain corresponding relation, Jiuquan wind-powered electricity generation unit installed capacity reaches 5,160,000 kilowatt hours, it is exerted oneself and the associated diagram that adds up electric weight shows: when the wind-electricity integration of certain installed capacity moves, the relation of electric power and electric weight is the growth along with wind-powered electricity generation electric power, by its wind-powered electricity generation electric weight journey downward trend that constitutes.
Similar to wind-powered electricity generation, the runoff of water power comes water also to have randomicity characteristics, but can be adjusted by reservoir with regulating power, make the reservoir letdown flow be tending towards controlled, even exerting oneself of hydroelectric station is tending towards controlled, the peak modulation capacity in hydroelectric station depends on the operation of its reservoir and the available unit capacity in power station, and the factor of decision hydroelectric station peak modulation capacity has 3, and forcing of hydroelectric station exerted oneself, envisioned and exert oneself and average output.
With reference to Fig. 3, Q, P, Y represent respectively that forcing of hydroelectric station exerted oneself among the figure, average output, anticipation exert oneself.Forcing exerts oneself is that the minimum in power station is exerted oneself, and it is the active volume (exerting oneself) in power station that anticipation is exerted oneself, and average output is exerting oneself of the power station available power correspondence of being come water, water restrictions, mainly reflects the actual electric weight of water power generating.The water power electric weight W of hydroelectric station every day
aComprise water power scalable electric weight W
AtForce electric weight W with water power
AqTwo parts: W
a=W
At+ W
Aq=P * 24.
The present invention adopts water power to provide peak for wind-powered electricity generation, is equivalent to utilize the regulating power of Hydropower Plant Reservoir to be wind-powered electricity generation energy storage peak regulation, when wind-powered electricity generation is exerted oneself increase, reduces exerting oneself of water power; Exert oneself when reducing at wind-powered electricity generation, strengthen water power and exert oneself, make wind-powered electricity generation and the water power sum of exerting oneself remain at certain certain value.Be specially: the maximum wind-powered electricity generation electric power of a permission has a corresponding wind-powered electricity generation electric weight.Suppose that the peak that water power can provide for wind-powered electricity generation in the electrical network is F, the maximum output that is to say the wind-powered electricity generation that can allow by the water power adjusting is F, guaranteeing that wind-powered electricity generation and the water power sum of exerting oneself is under the prerequisite of definite value (F+Q) so, make exerting oneself of water power and wind-powered electricity generation whenever all satisfy the restriction of water power active volume, the water that satisfies reservoir again is enough to regulate the requirement of wind-powered electricity generation electric power, and then to exert oneself be exactly the wind-powered peak regulation capacity that water power can provide to this maximum wind-powered electricity generation.
The present invention is based on the dispatching method of the peak load regulation network ability that large-scale wind power is incorporated into the power networks, may further comprise the steps:
(1), the water power of gathering given network system forces the Q that exerts oneself, water power average output P, water power to envision exert oneself Y and per day water power electric weight W
a, per day wind-powered electricity generation electric weight W
i, per day wind-powered electricity generation utilizes hourage H, and the peak of setting water power and providing for wind-powered electricity generation is that F, wind-powered electricity generation and the water power sum of exerting oneself is definite value F+Q, makes W
a+ W
i〉=(F+Q) * 24, the minimum admittance of the wind-powered electricity generation electric weight that can get network system is W
Imin=(F+Q-P) * 24, the maximum admittance of wind-powered electricity generation electric weight is W
Imax=(Y-P) * 24.
(a) work as W
Iminn≤ W
i≤ W
ImaxThe time, but the wind-powered electricity generation of water power balance is exerted oneself and is F
a=F.
As shown in Figure 4, in this case, but water power complete equipilibrium wind-powered electricity generation.But the wind-powered electricity generation of water power balance is exerted oneself and the wind-powered electricity generation electric weight is respectively F, (F * H); And water power still has more than needed, and unnecessary water power can participate in the network system peak regulation, but the water power electric weight W of participation system peak regulation
AsFor: W
As=(P-Q) * 24-F * (24-H).
(b) work as W
i〉=W
IminAnd W
i＞W
ImaxThe time, but the wind-powered electricity generation of water power balance is exerted oneself and is F
a=((Y-P) * 24)/H.
As shown in Figure 5, exerted oneself by water power and can not surpass the restriction that anticipation is exerted oneself and can not be abandoned the water peak regulation, F but the wind-powered electricity generation of water power balance is exerted oneself
aFor: F
a=((Y-P) * 24)/H.
(c) work as W
i＜W
Imin≤ W
ImaxThe time, but the wind-powered electricity generation of water power balance is exerted oneself and is F
a=((P-Q) * 24)/(24-H).
As shown in Figure 6, in this case, the F but the wind-powered electricity generation of water power balance is exerted oneself
a=((P-Q) * 24)/(24-H).
(2) wind-powered electricity generation is exerted oneself F
aThe analog computation model of the given network system of substitution operation calculates the load factor of thermoelectricity under the little mode and the difference F between the thermoelectricity under this load factor is exerted oneself and the thermoelectricity minimum technology is exerted oneself
Fire, can be the peak that wind-powered electricity generation provides as thermoelectricity.
After the geomantic omen complementary operation is carried out in hydroelectric station with regulating power, lost the ability that participates in network system load peak regulation, therefore, for satisfying the peak regulation requirement of network system load, other power supply in the electrical network must strengthen the peak regulation dynamics.Behind the peak that the deduction water power provides for wind-powered electricity generation, the analog computation model that uses traditional network system to move, calculating can draw the load factor of thermoelectricity under the little mode, and promptly thermoelectricity is born system loading, peak regulation and standby minimum and is gone out power rate.Difference F between thermoelectricity under this load factor is exerted oneself and the thermoelectricity minimum technology is exerted oneself
Fire, can be the peak that wind-powered electricity generation provides as thermoelectricity.The operation of existing network system all establishes the analog computation model, and the information of being obtained by this analog computation model is as the scheduling foundation of operation of power networks.
(3) work as F
Fire＜0 o'clock, the F but the wind-powered electricity generation that reduces the water power balance is exerted oneself
aValue, repeating step (2) is up to F
Fire〉=0, obtain total peak F that given network system provides for wind-powered electricity generation this moment
Always=F
a+ F
Fire, F
AlwaysBe the wind-powered electricity generation electric weight that to incorporate given network system into.
Work as F
Fire, show that thermoelectricity can also be used to wind-powered peak regulation for given network system provides the part capacity at＞0 o'clock;
Work as F
Fire, show that thermoelectricity can not be used to wind-powered peak regulation for the part capacity is provided for network system at=0 o'clock;
Work as F
Fire＜0 o'clock, show that thermoelectricity can not satisfy the requirement of given network system load peak regulation, need to reduce the provide peak of water power for wind-powered electricity generation, be used for the load peak regulation of given network system, need this moment to carry out tentative calculation according to above-mentioned steps again, up to F
Fire〉=0.
Need to prove, the electric weight and the water power electric weight that are constituted by fluid and electrolyte balance wind-powered electricity generation electric power, after determining fired power generating unit start mode, the electric power variation of fired power generating unit only causes the variation of thermoelectricity electric weight, can be not again the start mode of fired power generating unit not be impacted, thus the peak that provides to wind-powered electricity generation of the fired power generating unit of Que Dinging definite numerical value just.
In addition, the dispatching method of the peak load regulation network ability that is incorporated into the power networks based on large-scale wind power of the present invention can be applied to during actual schedule produces on the one hand; On the other hand, also can be used in the operation simulation of wind-powered electricity generation project of given network system future plan, in other words, this dispatching method can be verified the reasonability of wind-powered electricity generation project planning.
Now with 2010 level year of Northwest Grid prediction data be example, simulate the dispatching method of the peak load regulation network ability that is incorporated into the power networks based on large-scale wind power of the present invention.
1, be identified for hydroelectric station into wind-powered peak regulation: the installed capacity of hydroelectric station, the upper reaches of the Yellow River is big, adjusting function is good, consider the comprehensive water-using in Liujia Gorge and downstream thereof and reduce the menace of ice run, flood control requires complexity and strictness, be difficult to bring into play the peak load regulation network effect, in conjunction with Northwest Grid peak-frequency regulation management reality and power plant's scheduling administration relation, and according to the practical adjustments ability of each hydroelectric plant, 2010 select Long Yangxia, Li Jiaxia, Gongbo gorge, La Xiwa, long-pending Shi Xia hydroelectric station is wind-powered peak regulation; According to Long Yangxia, Li Jiaxia, Gongbo gorge, La Xiwa, long-pending Shi Xia hydroelectric station hydrological data and prediction: in September, 2010, the anticipation of above-mentioned hydroelectric station was exerted oneself 8,200,000 kilowatts, and 2,990,000 kilowatts of average outputs are forced and exerted oneself 158.4 ten thousand kilowatts.
2, the power producing characteristics of grid connected wind power is proposed: base, Jiuquan wind-powered electricity generation that is incorporated into the power networks, its in September, 2010 wind-powered electricity generation corresponding relation such as the following table 1 with electric weight (deriving from planning data and installed capacity) of exerting oneself.
Table 1
Form computing formula by water power, wind-powered electricity generation data: W
Imax=(820-299) * 24, calculating the admissible maximum wind-powered electricity generation electric weight of water power is 12,504 ten thousand kilowatt hours, corresponding maximum peak is 5,160,000 kilowatts.
3, calculate the peak that water power can provide for wind-powered electricity generation, and the pairing wind-electricity integration electric weight of this peak.
The W that requires according to step of the present invention (1)
a+ W
i〉=(F+Q) * 24, form computing formula by water power, wind-powered electricity generation data earlier: W
a+ W
i=(F+Q) * 24, i.e. (158.4+F) * 24=299 * 24+W
i, the peak that water power can be wind-powered electricity generation and provide is provided from table 1 is 2,400,000 kilowatts to formula thus, corresponding wind-powered electricity generation day electric weight be 2521.7 ten thousand kilowatt hours; If just do not satisfy W
a+ W
i=(F+Q) * 24 o'clock, choose immediate data, and W
a+ W
i〉=(F+Q) * 24.
According to the Northwest Grid operational data as can be known the average minimum technology of Shaanxi, Gansu, Ningxia, cleer sea fired power generating unit exert oneself and be respectively 55%, 66%, 68%, 66%.
Utilize the analog computation model of Northwest Grid system operation, the ratio of minimum load to maximum load that calculates Shaanxi, Gansu, Ningxia, cleer sea fired power generating unit is respectively 59%, 82%, 68%, 66%; And the fired power generating unit ratio of minimum load to maximum load among the power system operation analog computation result exerted oneself with the actual minimum technology of fired power generating unit compare, show that water power provides 2,400,000 kilowatts of peaks feasible for wind-powered electricity generation; The difference that fired power generating unit ratio of minimum load to maximum load of determining and actual minimum technology are exerted oneself, it is 1,340,000 kilowatts that the peak that fired power generating unit can be wind-powered electricity generation and provide is provided.
By water power and thermoelectricity amount part is the peak that wind-powered electricity generation provides, and it is 3,740,000 kilowatts that total peak that normal flow year Northwest Grid in September in 2010 can be wind-powered electricity generation and provide is provided.
Claims (1)
1. the dispatching method of a peak load regulation network ability that is incorporated into the power networks based on large-scale wind power is characterized in that, may further comprise the steps:
(1) water power of gathering given network system forces the Q that exerts oneself, water power average output P, water power to envision exert oneself Y and per day water power electric weight W
a, per day wind-powered electricity generation electric weight W
i, utilize hourage H based on the per day wind-powered electricity generation of wind-powered electricity generation maximum output, and the peak of setting water power and providing for wind-powered electricity generation is that F, wind-powered electricity generation and the water power sum of exerting oneself is definite value F+Q, makes W
a+ W
i〉=(F+Q) * 24, the minimum admittance of the wind-powered electricity generation electric weight that can get network system is W
Imin=(F+Q-P) * 24, the maximum admittance of wind-powered electricity generation electric weight is W
Imax=(Y-P) * 24;
Work as W
Imin≤ W
i≤ W
ImaxThe time, but the wind-powered electricity generation of water power balance is exerted oneself and is F
a=F;
Work as W
i〉=W
IminAnd W
i＞W
ImaxThe time, but the wind-powered electricity generation of water power balance is exerted oneself and is F
a=((Y-P) * 24)/H;
Work as W
i＜W
Imin≤ W
ImaxThe time, but the wind-powered electricity generation of water power balance is exerted oneself and is F
a=((P-Q) * 24)/(24-H);
(2) wind-powered electricity generation is exerted oneself F
aThe analog computation model of the given network system of substitution operation calculates the load factor of thermoelectricity under the little mode and the difference F between the thermoelectricity under this load factor is exerted oneself and the thermoelectricity minimum technology is exerted oneself
Fire, can be the peak that wind-powered electricity generation provides as thermoelectricity;
(3) work as F
Fire＜0 o'clock, the F but the wind-powered electricity generation that reduces the water power balance is exerted oneself
aValue, repeating step (2) is up to F
Fire〉=0, obtain total peak F that given network system provides for wind-powered electricity generation this moment
Always=F
a+ F
Fire, F
AlwaysBe the wind-powered electricity generation electric weight that to incorporate given network system into.
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