CN111245028B - Wind, light and water complementary power generation system power increasing and distributing method - Google Patents
Wind, light and water complementary power generation system power increasing and distributing method Download PDFInfo
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- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
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Abstract
The invention discloses a method for distributing the increased power generation amount of a wind-light-water complementary power generation system. And then calculating the power generation amount of the power generation resources, and obtaining the increased power generation amount of each power generation resource based on the Otman-Shapril value method. And then calculating to obtain the increased power generation amount distributed by each power generation member in the wind-light-water complementary power generation system. The method adopts the Otman-Shaapril value method to calculate the distribution problem of the power generation increment of the wind-light-water complementary system under a plurality of main conditions, overcomes the problem of large combined explosion calculation amount when large-scale power generation members participate in the wind-light-water complementary power generation system in the conventional cooperative game method, and realizes efficient and reasonable power generation increment distribution with small calculation amount.
Description
Technical Field
The invention relates to a method for distributing increased power generation quantity of a wind-light-water complementary power generation system, and belongs to the field of starting and debugging of ultra-high voltage power transmission and transformation projects.
Background
The incremental power generation sharing problem of the wind, light and water complementary power generation system with the cascade hydropower is a general problem of power generation distribution among interest alliances for building shared resources in a cooperative mode, and the problem is usually solved by adopting a cooperative game method. The power generation distribution mechanism based on the cooperative game meets the fair distribution requirements of individual rationality, alliance rationality and global rationality.
However, when there are many subjects participating in the complementary optimization scheduling, the calculation amount of the classic cooperative game method (sharey value method) is exponentially multiplied, and a combinatorial explosion problem occurs. In order to overcome the problem of combined explosion caused by the increase of the number of the main bodies, the method for processing the game of the alliance of infinite numbers of persons in the cooperative game, namely the Ouman Shapril value method, can be adopted. At present, the Otman-Shapril value method is applied to the problems of power transmission cost apportionment, power transmission network loss apportionment, blocking expense apportionment and the like, but both methods are not used for solving the problem of wind-light-water complementary power generation amount apportionment.
Disclosure of Invention
The purpose of the invention is as follows: the invention provides a method for distributing the increased power generation quantity of a wind-light-water complementary power generation system, which realizes efficient and reasonable increased power generation quantity distribution with smaller calculation amount.
The technical scheme is as follows: the technical scheme adopted by the invention is a method for distributing the increased power generation quantity of a wind-light-water complementary power generation system, which is characterized by comprising the following steps of:
1) calculating the path integral of the power generation member based on the Ohman-Shapril value method;
2) calculating the generated energy of the power generation resources, and obtaining the increased power generation quantity of each power generation resource based on the Ohman-Charpy value method;
3) and calculating to obtain the increased power generation quantity distributed by each power generation member in the wind-light-water complementary power generation system.
Path integral phi of the power generation member in the step 1) i The following were used:
in the formula, b i For all the generating resources of a generating member i at a certain moment, f () is a continuous differentiable generating capacity function, and lambda belongs to [0,1 ]]Is a proportionality coefficient, λ b i Representing a certain part of a resource, an integrand
When the power generation resource is lambdab i And when the power generation member is in the limit power generation amount meeting the constraint condition, the ith power generation member is in the limit power generation amount meeting the constraint condition.
In the step 2), the power generation resources are divided into K parts, and the kth power generation resource is b lambda k (K — 1, …, K), then:
Z(λ k )＝Max cx dual var iable
s.t.x≤bλ k π k
in the formula, pi k For power generation resources with an upper limit of b λ k A dual variable corresponding to the time power generation resource x;
at this time, the amount of power generation Δ Z generated by the power generation resource x is:
ΔZ＝Z(λ k -λ k-1 )＝π k Δb k ＝π k b(λ k -λ k-1 )
the total generated energy phi generated by the power generation resource x is:
the power generation increasing quantity generated by each power generation resource of the wind, light and water complementary power generation system is respectively as follows:
in the formula, pi wd,i,t,k Increasing the power generation amount for the margin of the kth wind power resource corresponding to the wind turbine generator i in the t time period; pi pv,i,t,k Increasing the power generation amount of the photovoltaic module i corresponding to the k part of the photoelectric resource in the t period; pi Q,i,t,k Increasing the power generation amount for the margin of the k-th power generation water consumption corresponding to the hydroelectric generating set i in the t period; pi V,i,t,k Increasing the power generation amount for the margin of the photovoltaic module i corresponding to the kth water storage amount in the t period;
respectively representing the variable quantity of each wind power resource, photovoltaic resource, power generation water resource and water storage resource;
increasing the power generation quantity for the total power generation caused by the wind power resource;
increasing the power generation amount for the total power generation caused by the photoelectric resource;
the power generation quantity is increased for the total power generation caused by the hydroelectric resources.
The increased power generation amount distributed by each power generation member in the step 3) is as follows:
in the formula, phi A-S Increasing the amount of power generated, Δ P, for all the members of the complementary power generation system WPH In order to increase the amount of electricity generated,
a set for increasing the amount of power generated by the nth power generation member in the complementary power generation system comprises
The second expression shows that the distribution result of the nth power generation member is the power generation amount v (n) generated by the power generation member during independent operation, and the increased power generation amount is distributed according to the ratio of the power generation amount generated by all the power generation resources of the member in the optimal operation state to the power generation amount generated by all the members in the market.
Has the advantages that: the method adopts the Ohman-Xiapril value method to calculate the distribution problem of the increased power generation quantity of the wind-light-water complementary system under a plurality of main conditions, overcomes the problem of large combined explosion calculation quantity when large-scale power generation members participate in the wind-light-water complementary power generation system by the conventional cooperative game method, and realizes efficient and reasonable increased power generation quantity distribution with small calculation quantity.
Drawings
FIG. 1 is a proportion diagram of the power increase amount of electricity generated by each power generation member under different allocation methods;
FIG. 2 shows the error rates of the Owman-Shapril method at different K values.
Detailed Description
The apportionment method of the embodiment assumes that all power generation resources of the power generation member i at a certain moment are b i F () is a continuous differentiable power generation function, λ ∈ [0,1 ]]Is a proportionality coefficient, λ b i Representing a certain part of resources, and the path integral phi of the power generation member is calculated by the Ouman-Shapril value method i ：
In the formula, the integrand
When the power generation resource is lambdab i And when the power generation quantity is increased marginally, the ith power generation member meets the constraint condition.
Because the calculation process of the marginal increased power generation amount of each power generation member in the wind-light-water complementary power generation system is complex, based on the marginal increased power generation amount principle, the power generation resources are assumed to be divided into K parts, and the kth power generation resource is blambda k (K — 1, …, K), then:
in the formula, pi k For power generation resources with an upper limit of b λ k And (4) a dual variable corresponding to the time power generation resource x.
At this time, the power generation increase amount Δ Z generated by the power generation resource x is:
ΔZ＝Z(λ k -λ k-1 )＝π k Δb k ＝π k b(λ k -λ k-1 ) (16)
the total power generation increment phi generated by the power generation resource x is as follows:
therefore, the power generation increasing amount generated by each power generation resource of the wind-light-water complementary power generation system based on the Ohman-Charpy value method is as follows:
in the formula, pi wd,i,t,k Increasing the power generation amount of the margin corresponding to the kth wind power resource for the wind turbine generator i at the t time period; pi pv,i,t,k Increasing the power generation amount of the photovoltaic module i corresponding to the k part of the photoelectric resource in the t period; pi Q,i,t,k Increasing the power generation amount for the margin of the k part of power generation water consumption corresponding to the hydroelectric generating set i in the t time period; pi V,i,t,k Increasing the power generation amount for the margin of the photovoltaic module i corresponding to the kth part of water storage amount in the t time period;
respectively representing the variable quantity of each wind power resource, photovoltaic resource, power generation water resource and water storage resource;
increasing the power generation quantity for the total power generation caused by the wind power resource;
increasing the power generation amount for the total power generation caused by the photoelectric resource;
the power generation quantity is increased for the total power generation caused by the hydroelectric resources.
The method for sharing the power generation increasing quantity of the wind-light-water complementary power generation system based on the Ohman-Shapril value method can be expressed as follows:
in the formula, phi A-S Increasing the amount of power generated, Δ P, for all the members of the complementary power generation system WPH To increase the amount of power generation.
A set for increasing the amount of power generated by the nth power generation member in the complementary power generation system comprises
The formula (20) shows that the distribution result of the nth power generation member is the generated energy v (n) generated by the power generation member during independent operation, and the increased generated energy is distributed according to the ratio of the generated energy generated by all the power generation resources of the nth power generation member in the optimal operation state of the nth power generation member to the generated energy generated by all the members in the market.
Example of calculation
The wind, light and water complementary power generation system containing the cascade hydropower stations, which is composed of 2 cascade hydropower stations, 1 large wind farm and 1 large photovoltaic power station in a certain watershed, is taken as an example. Suppose that a wind power plant is a power generation member 1, a photovoltaic power station is a power generation member 2, an upstream hydropower station is a power generation member 3, and a downstream hydropower station is a power generation member 4. Based on the cooperative game theory, the whole generating member set and each non-empty subset form a coalition, and 15 coalitions are formed in total. The power of each alliance is shown in table 1, and the power increase of each alliance is shown in table 2:
TABLE 1
TABLE 2
And then, respectively adopting a proportional allocation method, a marginal increment method, a final addition method, a Shapley value method and an Oumann-Shapril value method to perform increased power generation quantity distribution on the wind, light and water complementary power generation system containing the stepped hydropower, wherein the ratio of the increased power generation quantity distributed by each power generation member to the total increased power generation quantity is shown in figure 1, and the distribution result of each power generation member is shown in table 3. Wherein each histogram in fig. 1 is divided into a wind farm, a photovoltaic farm, an upstream hydropower station and a downstream hydropower station from top to bottom. Based on the sharey value method distribution result, as the number of the power generation resource segments is increased, the K value is increased, the more the olympic mean value method distribution result is close to the sharey value method distribution result, and the error is reduced, as shown in fig. 2.
TABLE 3
Claims (2)
1. The method for distributing the increased power generation quantity of the wind-solar-water complementary power generation system is characterized by comprising the following steps of:
1) calculating the path integral of the power generation member based on the Ohman-Shapril value method, wherein the path integral phi of the power generation member i The following were used:
in the formula, b i For all power generation resources of a power generation member i at a certain time, f () is a continuous differentiable power generation function, and lambda belongs to [0,1 ]]Is a proportionality coefficient, λ b i Representing a certain part of a resource, an integrand
When the power generation resource is lambdab i When the power generation is carried out, the marginal power generation amount of the ith power generation member under the condition of meeting the constraint condition is obtained;
2) calculating the generated energy of the power generation resources, and obtaining the increased power generation quantity of each power generation resource based on the Ohman-Shapril value methodDividing the power generation resources into K parts, wherein the K part of the power generation resources is b lambda k (K — 1, …, K), then:
Z(λ k )＝Max cx dual var iable
s.t.x≤bλ k π k
in the formula, pi k For the generation of electricity, the upper limit of resources is b lambda k A dual variable corresponding to the time power generation resource x;
at this time, the amount of power generation Δ Z generated by the power generation resource x is:
ΔZ＝Z(λ k -λ k-1 )＝π k Δb k ＝π k b(λ k -λ k-1 )
the total generated energy phi generated by the power generation resource x is:
3) calculating to obtain the increased power generation amount distributed by each power generation member in the wind-light-water complementary power generation system, and as follows:
in the formula, phi A-S Increasing the amount of power generated, Δ P, for all the members of the complementary power generation system WPH In order to increase the amount of electricity generated,
a set for increasing the amount of power generated by the nth power generation member in the complementary power generation system comprises
The second expression shows that the distribution result of the nth power generation member is the generated energy v (n) generated by the power generation member during independent operation, and the increased generated energy is distributed according to the ratio of the generated energy generated by all the power generation resources of the nth power generation member in the optimal operation state of the nth power generation member to the generated energy generated by all members in the market.
2. The method for distributing the increased power generation amount of the wind, light and water hybrid power generation system according to claim 1, wherein the increased power generation amount generated by each power generation resource of the wind, light and water hybrid power generation system is respectively as follows:
in the formula, pi wd,i,t,k Increasing the power generation amount of the margin corresponding to the kth wind power resource for the wind turbine generator i at the t time period; pi pv,i,t,k Increasing the power generation amount for the margin of the photovoltaic module i corresponding to the kth photoelectric resource in the t period; pi Q,i,t,k Increasing the power generation amount for the margin of the k-th power generation water consumption corresponding to the hydroelectric generating set i in the t period; pi V,i,t,k Increasing the power generation amount for the margin of the photovoltaic module i corresponding to the kth part of water storage amount in the t time period;
the variable quantity of each part of wind power resource, photovoltaic resource, power generation water resource and water storage resource is respectively;
increasing power generation for total power generation caused by wind power resourcesAn amount;
increasing the power generation amount for the total power generation caused by the photoelectric resource;
the total power generation quantity caused by hydroelectric resources is increased.
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Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN103955763A (en) * | 2014-04-25 | 2014-07-30 | 云南省电力设计院 | Computing method of wind-solar complementary station capacity ratio |
| CN109742803A (en) * | 2019-01-31 | 2019-05-10 | 河海大学 | A kind of distribution network loss methodology containing distributed generation resource |
| CN109858173A (en) * | 2019-02-18 | 2019-06-07 | 华中科技大学 | A kind of multiple target tangent method of wind-light-water complementary electricity-generating system combined dispatching |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103955763A (en) * | 2014-04-25 | 2014-07-30 | 云南省电力设计院 | Computing method of wind-solar complementary station capacity ratio |
| CN109742803A (en) * | 2019-01-31 | 2019-05-10 | 河海大学 | A kind of distribution network loss methodology containing distributed generation resource |
| CN109858173A (en) * | 2019-02-18 | 2019-06-07 | 华中科技大学 | A kind of multiple target tangent method of wind-light-water complementary electricity-generating system combined dispatching |
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