CN113902490A - Electric energy spot and running standby combined transaction clearing method and system - Google Patents

Electric energy spot and running standby combined transaction clearing method and system Download PDF

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CN113902490A
CN113902490A CN202111232824.8A CN202111232824A CN113902490A CN 113902490 A CN113902490 A CN 113902490A CN 202111232824 A CN202111232824 A CN 202111232824A CN 113902490 A CN113902490 A CN 113902490A
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刘岩
叶振豪
王冬
张宗包
武婕
张夕佳
陈栋
柳乐怡
詹隽
于洋洋
张蕾
李雨森
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Abstract

The invention provides a method for clearing electric energy spot goods and operation standby joint transaction, which comprises the steps of obtaining the number of conventional power generator sets, the number of new energy power stations, the number of load nodes and the number of optimized time periods in a power grid, and solving a power generation plan and a corresponding clearing price of each conventional power generator set at each time period by using a power spot market clearing model without network constraint; calculating running standby virtual quotations of each conventional power generator set in each time period according to the clearing price; and (4) combining the clearing price and the running standby virtual quotation of each period of each conventional power supply generator set, and solving a minimum solution for the electric energy and running standby combined clearing model under the operation constraint of the power grid and the conventional power supply, wherein the minimum solution is the final cost. By implementing the method, the running standby clearing result of each generator set can be determined according to the virtual quotation on the basis of the electric energy trading clearing result, and the problem that collusion quotation is difficult to monitor in the existing combined clearing mode is solved.

Description

Electric energy spot and running standby combined transaction clearing method and system
Technical Field
The invention relates to the technical field of smart power grids and the technical field of crossing of power markets and dispatching operation, in particular to a method and a system for achieving combined trading clearing of electric energy spot goods and operation standby.
Background
The spot transaction and the running standby transaction of the electric energy are different transaction varieties in an electric power market transaction system. In 2015, China started a new cycle of power system innovation. The medium and long term transaction mechanism of the electric energy is gradually established and perfected. The electric energy spot transaction and the electric power auxiliary service market transaction become the key points of the research in the current market transaction field. The operation standby transaction is the main transaction variety of the electric power auxiliary service market transaction. The transaction clearing is a process of determining a service provider and clearing price according to market demands in the electric power market transaction.
The electric energy and the operation reserve have a tighter coupling relation, which is reflected in that the total amount of the electric energy service and the operation reserve service which can be provided by any generator set is determined by the total generating capacity of the generator set. This characteristic determines that the genset electrical energy service and the operational reserve service have an alternative effect in that either unit of generating capacity is used to provide the electrical energy service, the operational reserve service is not provided, and the electrical energy service is not provided when used to provide the operational reserve service.
In current research and practical application, there are two main discharge modes for spot transaction and standby transaction of electric energy, including a step discharge mode and a combined discharge mode. In the step-by-step clearing mode, the electric energy spot transaction and the operation standby transaction are sequentially subjected to transaction clearing, the operation standby transaction clearing is preferably carried out generally, and the clearing result is used as a boundary condition of the electric energy spot transaction; in the combined clearing mode, the electric energy spot transaction and the operation standby transaction are cleared in a combined mode, and the combined clearing mode is mainly characterized in that a market main body simultaneously declares the electric energy spot transaction price and the operation standby transaction price, and a market operating organization synchronously carries out the clearing of transactions of two varieties.
However, the joint export model is the main research and application direction at present, because the opportunity cost problem exists in the step export model, which may cause the profit of market main body to be damaged. However, as the electric power market trading system becomes more complex, the above-mentioned combined clearing mode also faces the following problems: the collusion of market main bodies can be more complicated, and the supervision difficulty is improved; because the close coupling relation exists between the electric energy spot market and the operation standby market, the price declaration combination form of the market main body is richer, the collusion behavior of the market main body is more difficult to find, the difficulty of accurately identifying the proper playing and collusion quotation of the market main body is higher for a market operation organization, and the method becomes a main problem of market supervision. Therefore, there is a need for an improvement of the existing combined clearance mode to solve the above-mentioned problems of the current combined clearance mode.
Disclosure of Invention
The technical problem to be solved by the embodiment of the invention is to provide a method and a system for clearing electric energy spot and running reserve combined transaction, which can determine running reserve clearing results of each generator set according to virtual quotations on the basis of electric energy transaction clearing results, are used for solving the problem that collusion quotations are difficult to monitor in the existing combined clearing mode, and reduce market complexity.
In order to solve the above technical problem, an embodiment of the present invention provides a method for clearing electric energy spot and running reserve joint transaction, where the method includes the following steps:
acquiring the number of conventional power generator sets, the number of new energy power stations, the number of load nodes and the number of optimized time periods in a power grid, solving a power generation plan of each conventional power generator set at each time period by utilizing a predefined power spot market clearing model without network constraint, and further measuring and calculating clearing prices of each conventional power generator set at each time period;
calculating running standby virtual quotations of each conventional power generator set at each time interval according to the clearing price of each conventional power generator set at each time interval;
and (3) solving a minimum solution for the electric energy and running reserve combined clearing model under the predefined power grid running class and conventional power supply running constraint by combining clearing price and running reserve virtual quotation of each conventional power supply generator set at each time interval, wherein the minimum solution is the finally required comprehensive cost for purchasing the electricity from the whole power grid.
The electric power spot market clearing model under the non-network constraint is a function constructed by taking electric power balance constraint, conventional power supply generator set generating capacity constraint and conventional power supply generator set climbing capacity constraint as constraint conditions and taking the lowest electricity purchasing cost as an optimization target.
Wherein the power spot market clearing model under the no-network constraint is expressed by the following formulas (1) to (4):
Figure BDA0003316524170000031
Figure BDA0003316524170000032
Figure BDA0003316524170000033
Figure BDA0003316524170000034
wherein formula (1) is an optimization objective; equations (2) - (4) are respectively power balance constraint, power generation capacity constraint of the conventional power generator set and climbing capacity constraint of the conventional power generator set; n is a radical ofG、NN、NB、NTThe number of the conventional power generator sets in the power grid, the number of new energy power stations, the number of load nodes and the number of optimization time periods are respectively corresponding to the number of the conventional power generator sets in the power grid; Δ T is the optimization interval;
Figure BDA0003316524170000035
generating a power plan for a conventional power generator set g time period t;
Figure BDA0003316524170000036
reporting a price function for the conventional power supply g in the electric power spot market;
Figure BDA0003316524170000037
predicting the generated power of the new energy power station at n time t;
Figure BDA0003316524170000038
load demand prediction for a load node b time period t;
Figure BDA0003316524170000039
the upper limit and the lower limit of the generating capacity of the generator set g of the conventional power supply are respectively set;
Figure BDA00033165241700000310
the upper limit and the lower limit of the climbing capability of the conventional power generator set g are respectively set;
Figure BDA00033165241700000311
the price is the clearing price of the conventional power generator set g in the period t.
Wherein, by the formula
Figure BDA00033165241700000312
Calculating the running standby virtual quotation of each period of each conventional power generator set
Figure BDA00033165241700000313
Wherein,
Figure BDA00033165241700000314
Figure BDA00033165241700000315
for the marginal clearing price of the spot market of the system electric energy in the time period t,
Figure BDA00033165241700000316
the clearing price maximum value of all the conventional power generating sets is obtained.
Wherein, if
Figure BDA00033165241700000317
Determining the electric energy trading clearing price of the conventional power generator set g in the time period t without network constraint
Figure BDA00033165241700000318
Lower than the marginal clearing price of the system electric energy spot market
Figure BDA00033165241700000319
Running the standby market should complement the opportunity cost; if it is
Figure BDA00033165241700000320
The limit power generation of the t period is determined to be higher than the marginal clearing price of the system electric energy spot market due to other reasons
Figure BDA00033165241700000321
So that the running standby virtual quote is 0.
The electric energy and operation standby combined clear model is a function constructed by taking power grid operation type constraint and conventional power supply operation constraint as constraint conditions and taking the lowest comprehensive cost of power purchase of the whole power grid as an optimization target; wherein,
the power grid operation type constraints comprise power balance constraints, network transmission constraints and operation standby capacity constraints; the conventional power supply operation constraints comprise power generation capacity constraints, climbing capacity constraints and operation standby constraints.
Wherein the electric energy and operation reserve combined clear model is expressed by the following formulas (7) to (13):
Figure BDA0003316524170000041
Figure BDA0003316524170000042
Figure BDA0003316524170000043
Figure BDA0003316524170000044
Figure BDA0003316524170000045
Figure BDA0003316524170000046
Figure BDA0003316524170000047
wherein, formula (7) is an optimization objective; fTThe comprehensive cost of purchasing electricity for the whole network is saved;
Figure BDA0003316524170000048
operating a standby plan for the conventional power generator set g time period t;
equations (8) - (10) are respectively a power balance constraint, a network transmission constraint and an operation reserve capacity constraint in the power grid operation class constraint; gos,g、Gos,n、Gos,bRespectively are power transfer distribution factors of a conventional power generator set g, a new energy power station n, a load node b and an operation section os;
Figure BDA0003316524170000049
the upper limit and the lower limit of the transmission capacity of the operation section os are respectively set; rsetThe reserve capacity requirement is met for the operation of the power grid;
equations (11) - (13) are respectively the power generation capacity constraint, the climbing capacity constraint and the operation standby constraint in the conventional power supply operation constraint; min { } represents taking the minimum value of each data.
The embodiment of the invention also provides a combined transaction clearing system for the spot and the standby operation of the electric energy, which comprises the following steps:
the clearing price calculating unit is used for acquiring the number of conventional power generating sets, the number of new energy power stations, the number of load nodes and the number of optimized time periods in a power grid, solving a power generation plan of each conventional power generating set in each time period by using a predefined power spot market clearing model without network constraint, and further measuring and calculating clearing prices of each conventional power generating set in each time period;
the standby virtual quotation calculation unit is used for calculating the running standby virtual quotation of each conventional power generator set in each time period according to the clearing price of each conventional power generator set in each time period;
and the total-network electricity purchasing comprehensive cost calculation unit is used for solving a minimum solution for a predefined combined clearing model of the electric energy and the running reserve under the operation constraints of the power grid and the conventional power supply by combining the clearing price and the running reserve virtual quotation of each conventional power supply generator set in each time period, wherein the minimum solution is the finally required total-network electricity purchasing comprehensive cost.
The electric power spot market clearing model under the non-network constraint is a function constructed by taking electric power balance constraint, conventional power supply generator set generating capacity constraint and conventional power supply generator set climbing capacity constraint as constraint conditions and taking the lowest electricity purchasing cost as an optimization target.
The electric energy and operation standby combined clear model is a function constructed by taking power grid operation type constraint and conventional power supply operation constraint as constraint conditions and taking the lowest comprehensive cost of power purchase of the whole power grid as an optimization target; wherein,
the power grid operation type constraints comprise power balance constraints, network transmission constraints and operation standby capacity constraints; the conventional power supply operation constraints comprise power generation capacity constraints, climbing capacity constraints and operation standby constraints.
The embodiment of the invention has the following beneficial effects:
compared with the combined clearing mode in the prior art, the method only needs to declare the electric energy trading price, reduces the complexity of market trading declaration, can determine the operation standby clearing result of each generator set according to the virtual quotation on the basis of the electric energy trading clearing result, and accordingly compensates the sinking cost of the electric energy trading caused by providing the operation standby service more objectively, solves the problem that the prior combined clearing mode has collusion quotation and is difficult to monitor, is simple in implementation process, and is beneficial to promoting the electric power market construction in China.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is within the scope of the present invention for those skilled in the art to obtain other drawings based on the drawings without inventive exercise.
Fig. 1 is a flowchart of an electric energy spot and operation standby combined transaction clearing method according to an embodiment of the present invention;
fig. 2 is a schematic structural diagram of an electric energy spot and operation standby combined transaction clearing system according to an embodiment of the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention will be described in further detail with reference to the accompanying drawings.
As shown in fig. 1, in an embodiment of the present invention, an electric energy spot and operation standby combined transaction clearing system is provided, where the method includes the following steps:
step S1, acquiring the number of conventional power generator sets, the number of new energy power stations, the number of load nodes and the number of optimized time periods in a power grid, solving a power generation plan of each conventional power generator set at each time period by utilizing a predefined power spot market clearing model without network constraint, and further measuring and calculating clearing prices of each conventional power generator set at each time period;
step S2, calculating running standby virtual quotations of each conventional power generator set in each time period according to the clearing price of each conventional power generator set in each time period;
and step S3, combining the clearing price and the running standby virtual quotation of each period of time of each conventional power supply generator set, and solving a minimum solution for the electric energy and running standby combined clearing model under the predefined power grid running class and conventional power supply running constraint, wherein the minimum solution is the finally required comprehensive cost of power purchasing of the whole power grid.
The specific process is that before step S1, a power spot market clearing model without network constraint is predefined, and the model is a function constructed by taking a power balance constraint, a conventional power generator set power generation capacity constraint and a conventional power generator set climbing capacity constraint as constraint conditions, and taking the lowest electricity purchasing cost as an optimization target. The purpose of predefining the electric energy spot market clearing model under the condition of no network constraint is to carry out electric energy spot market clearing under the condition of not considering the network constraint so as to determine the supply and demand situations at different time intervals and determine the marginal price of electric energy spot trade under the condition of no network constraint.
The electric power spot market clearing model under no network constraint is expressed by the following formulas (1) to (4):
Figure BDA0003316524170000071
Figure BDA0003316524170000072
Figure BDA0003316524170000073
Figure BDA0003316524170000074
formula (1) is an optimization objective; equations (2) - (4) are respectively power balance constraint, power generation capacity constraint of the conventional power generator set and climbing capacity constraint of the conventional power generator set; n is a radical ofG、NN、NB、NTThe number of the conventional power generator sets in the power grid, the number of new energy power stations, the number of load nodes and the number of optimization time periods are respectively corresponding to the number of the conventional power generator sets in the power grid; Δ T is the optimization interval;
Figure BDA0003316524170000075
a power generation plan for a conventional power generator set g time period t, namely power generation power prediction;
Figure BDA0003316524170000076
reporting a price function for the conventional power supply g in the electric power spot market;
Figure BDA0003316524170000077
predicting the generated power of the new energy power station at n time t;
Figure BDA0003316524170000078
load demand prediction, namely load power prediction, of a load node b at a time period t;
Figure BDA0003316524170000079
the upper limit and the lower limit of the generating capacity of the generator set g of the conventional power supply are respectively set;
Figure BDA00033165241700000710
the upper limit and the lower limit of the climbing capability of the conventional power generator set g are respectively set;
Figure BDA00033165241700000711
the price is the clearing price of the conventional power generator set g in the period t.
Before step S1, a power grid operation class and an electric energy and operation reserve combined clearing model under the conventional power supply operation constraint are predefined, and the model is a function constructed by taking the power grid operation class constraint and the conventional power supply operation constraint as constraint conditions and taking the lowest comprehensive cost of power purchasing of the whole grid as an optimization target; the power grid operation type constraints comprise power balance constraints, network transmission constraints and operation standby capacity constraints; conventional power supply operating constraints include power generation capacity constraints, climbing capacity constraints, and operational standby constraints.
The electric energy and operation reserve combined clear model under the operation constraint of the power grid and the conventional power supply is expressed by the following formulas (7) to (13):
Figure BDA00033165241700000712
Figure BDA0003316524170000081
Figure BDA0003316524170000082
Figure BDA0003316524170000083
Figure BDA0003316524170000084
Figure BDA0003316524170000085
Figure BDA0003316524170000086
the formula (7) is an optimization target and aims to determine a combined clearing optimization target based on the running standby virtual quotation of the conventional power generator set; fTThe comprehensive cost of purchasing electricity for the whole network is saved;
Figure BDA0003316524170000087
operating a standby plan for the conventional power generator set g time period t;
formulas (8) to (10) are respectively power balance constraint, network transmission constraint and operation reserve capacity constraint in the power grid operation class constraint, and aim to construct power balance, network transmission and other power grid operation type constraint conditions; gos,g、Gos,n、Gos,bRespectively are power transfer distribution factors of a conventional power generator set g, a new energy power station n, a load node b and an operation section os;
Figure BDA0003316524170000088
the upper limit and the lower limit of the transmission capacity of the operation section os are respectively set; rsetThe reserve capacity requirement is met for the operation of the power grid;
equations (11) - (13) are respectively a power generation capacity constraint, a climbing capacity constraint and an operation standby constraint in the conventional power supply operation constraint, and aim at constructing the conventional power supply operation constraint in consideration of the conventional power supply operation requirement; min { } represents taking the minimum value of each data.
In step S1, the number of conventional power generator sets, the number of new energy power stations, the number of load nodes, and the number of optimization time periods in the power grid are obtained, and thus, the power generation meter of each conventional power generator set at each time period can be obtained by solving the power spot market clearing model without network constraintScribe for drawing
Figure BDA0003316524170000089
. And further, combining the declared price function corresponding to the electric power spot market clearing model under the condition of no network constraint
Figure BDA00033165241700000810
And the clearing price of each conventional power generator set in each time period can be calculated and obtained
Figure BDA00033165241700000811
。
In step S2, considering the system electric energy spot trade marginal shipment price at any time point without considering the grid transmission constraint in step S1, the maximum value of the system electric energy spot market marginal shipment price at that time point may be taken as the maximum value of all the conventional power generator set shipment prices at that time point, which is specifically referred to the following formula:
Figure BDA0003316524170000091
in the formula (5), the reaction mixture is,
Figure BDA0003316524170000092
for the marginal clearing price of the spot market of the system electric energy in the time period t,
Figure BDA0003316524170000093
the clearing price maximum value of all the conventional power generating sets is obtained.
Calculating the running standby virtual quotation of each conventional power generator set in each time period through a formula (6)
Figure BDA0003316524170000094
The objective is to account for the loss of electricity market opportunity cost of the conventional power generator set due to the provision of operational standby auxiliary services for the purpose of operational standby compensation. Therefore, according to the result of the electric power spot shipment without network constraint, the basic purpose of the operation standby compensation is followedDetermining the operational reserve compensation price of a conventional power generator set, i.e. its virtual price quoted
Figure BDA0003316524170000095
Figure BDA0003316524170000096
In formula (6), if
Figure BDA0003316524170000097
Determining the electric energy trading clearing price of the conventional power generator set g in the time period t without network constraint
Figure BDA0003316524170000098
Lower than the marginal clearing price of the system electric energy spot market
Figure BDA0003316524170000099
The running standby market should complement the opportunity cost; if it is
Figure BDA00033165241700000910
The limit power generation of the t period is determined to be higher than the marginal clearing price of the system electric energy spot market due to other reasons
Figure BDA00033165241700000911
So that the running standby virtual quote is 0.
In step S3, the clearing price of each time slot of each conventional power generator set obtained in step S1 and the running reserve virtual quotation of each time slot of each conventional power generator set obtained in step S2 are combined with the electric energy and running reserve under the power grid running class and conventional power supply running constraint in the lead-in equations (7) to (13) to obtain a minimum solution, and the minimum solution is the finally required total power purchase comprehensive cost.
It should be noted that the electric energy and operation standby combined clearing model under the operation constraint of the power grid and the conventional power supply is a linear programming problem in nature, and can be directly solved by adopting a simple method or calling a commercial programming software package, and belongs to conventional technical means in the technical field, and a specific solving process is not repeated herein.
As shown in fig. 2, in an embodiment of the present invention, an electric energy spot and operation standby combined transaction clearing system is provided, including:
the clearing price calculating unit 110 is configured to obtain the number of conventional power generator sets, the number of new energy power stations, the number of load nodes, and the number of optimization time periods in the power grid, solve a power generation plan of each conventional power generator set at each time period by using a predefined power spot market clearing model without network constraint, and further measure and calculate a clearing price of each conventional power generator set at each time period;
the standby virtual quotation calculation unit 120 is used for calculating the running standby virtual quotation of each conventional power generator set in each time period according to the clearing price of each conventional power generator set in each time period;
and the total-grid electricity-purchasing comprehensive cost calculation unit 130 is configured to calculate a minimum solution for a predefined electric energy and running reserve combined clearing model under the operation constraints of the power grid and the conventional power supply in combination with the clearing price and the running reserve virtual quotation of each conventional power generator set at each time interval, where the minimum solution is the finally required total-grid electricity-purchasing comprehensive cost.
The electric power spot market clearing model under the non-network constraint is a function constructed by taking electric power balance constraint, conventional power supply generator set generating capacity constraint and conventional power supply generator set climbing capacity constraint as constraint conditions and taking the lowest electricity purchasing cost as an optimization target.
The electric energy and operation standby combined clear model is a function constructed by taking power grid operation type constraint and conventional power supply operation constraint as constraint conditions and taking the lowest comprehensive cost of power purchase of the whole power grid as an optimization target; wherein,
the power grid operation type constraints comprise power balance constraints, network transmission constraints and operation standby capacity constraints; the conventional power supply operation constraints comprise power generation capacity constraints, climbing capacity constraints and operation standby constraints.
The embodiment of the invention has the following beneficial effects:
compared with the combined clearing mode in the prior art, the method only needs to declare the electric energy trading price, reduces the complexity of market trading declaration, can determine the operation standby clearing result of each generator set according to the virtual quotation on the basis of the electric energy trading clearing result, and accordingly compensates the sinking cost of the electric energy trading caused by providing the operation standby service more objectively, solves the problem that the prior combined clearing mode has collusion quotation and is difficult to monitor, is simple in implementation process, and is beneficial to promoting the electric power market construction in China.
It should be noted that, in the above system embodiment, each included unit is only divided according to functional logic, but is not limited to the above division as long as the corresponding function can be implemented; in addition, specific names of the functional units are only for convenience of distinguishing from each other, and are not used for limiting the protection scope of the present invention.
It will be understood by those skilled in the art that all or part of the steps in the method for implementing the above embodiments may be implemented by relevant hardware instructed by a program, and the program may be stored in a computer-readable storage medium, such as ROM/RAM, magnetic disk, optical disk, etc.
The above disclosure is only for the purpose of illustrating the preferred embodiments of the present invention, and it is therefore to be understood that the invention is not limited by the scope of the appended claims.

Claims (10)

1. The method for clearing the electric energy spot and operation standby combined transaction is characterized by comprising the following steps of:
acquiring the number of conventional power generator sets, the number of new energy power stations, the number of load nodes and the number of optimized time periods in a power grid, solving a power generation plan of each conventional power generator set at each time period by utilizing a predefined power spot market clearing model without network constraint, and further measuring and calculating clearing prices of each conventional power generator set at each time period;
calculating running standby virtual quotations of each conventional power generator set at each time interval according to the clearing price of each conventional power generator set at each time interval;
and (3) solving a minimum solution for the electric energy and running reserve combined clearing model under the predefined power grid running class and conventional power supply running constraint by combining clearing price and running reserve virtual quotation of each conventional power supply generator set at each time interval, wherein the minimum solution is the finally required comprehensive cost for purchasing the electricity from the whole power grid.
2. The method according to claim 1, wherein the electric energy spot and operation reserve combined transaction clearing model without network constraint is a function constructed by taking an electric power balance constraint, a conventional power generator set generating capacity constraint and a conventional power generator set climbing capacity constraint as constraint conditions and taking the lowest electricity purchasing cost as an optimization goal.
3. The electric energy spot and operational reserve combined transaction clearing method according to claim 2, wherein the electric power spot market clearing model under no network constraint is expressed by the following equations (1) to (4):
Figure FDA0003316524160000011
Figure FDA0003316524160000012
Figure FDA0003316524160000013
Figure FDA0003316524160000014
wherein formula (1) is an optimization objective; equations (2) - (4) are respectively power balance constraint, power generation capacity constraint of the conventional power generator set and climbing capacity constraint of the conventional power generator set; n is a radical ofG、NN、NB、NTThe number of the conventional power generator sets in the power grid, the number of new energy power stations, the number of load nodes and the number of optimization time periods are respectively corresponding to the number of the conventional power generator sets in the power grid; Δ T is the optimization interval;
Figure FDA0003316524160000021
generating a power plan for a conventional power generator set g time period t;
Figure FDA0003316524160000022
reporting a price function for the conventional power supply g in the electric power spot market;
Figure FDA0003316524160000023
predicting the generated power of the new energy power station at n time t;
Figure FDA0003316524160000024
load demand prediction for a load node b time period t;
Figure FDA0003316524160000025
the upper limit and the lower limit of the generating capacity of the generator set g of the conventional power supply are respectively set;
Figure FDA0003316524160000026
the upper limit and the lower limit of the climbing capability of the conventional power generator set g are respectively set;
Figure FDA0003316524160000027
the price is the clearing price of the conventional power generator set g in the period t.
4. The combined spot and operational reserve trading method of claim 3, wherein the trading is based on the formula
Figure FDA0003316524160000028
Calculating the running standby virtual quotation of each period of each conventional power generator set
Figure FDA0003316524160000029
Wherein,
Figure FDA00033165241600000210
Figure FDA00033165241600000211
for the marginal clearing price of the spot market of the system electric energy in the time period t,
Figure FDA00033165241600000212
the clearing price maximum value of all the conventional power generating sets is obtained.
5. The combined spot and operational reserve energy trading method of claim 4, wherein said step of determining if said step of determining is successful is performed
Figure FDA00033165241600000213
Determining the electric energy trading clearing price of the conventional power generator set g in the time period t without network constraint
Figure FDA00033165241600000214
Lower than the marginal clearing price of the system electric energy spot market
Figure FDA00033165241600000215
Running the standby market should complement the opportunity cost; if it is
Figure FDA00033165241600000216
The limit power generation of the t period is determined to be higher than the marginal clearing price of the system electric energy spot market due to other reasons
Figure FDA00033165241600000217
So that the running standby virtual quote is 0.
6. The method according to claim 5, wherein the electric energy spot and operation reserve combined transaction clearing model is a function constructed by taking a power grid operation type constraint and a conventional power supply operation constraint as constraint conditions and taking the lowest comprehensive cost of power purchase of the whole power grid as an optimization target; wherein,
the power grid operation type constraints comprise power balance constraints, network transmission constraints and operation standby capacity constraints; the conventional power supply operation constraints comprise power generation capacity constraints, climbing capacity constraints and operation standby constraints.
7. The electric energy spot and operation reserve combined transaction clearing method according to claim 6, wherein the electric energy spot and operation reserve combined clearing model is expressed by the following equations (7) to (13):
Figure FDA0003316524160000031
Figure FDA0003316524160000032
Figure FDA0003316524160000033
Figure FDA0003316524160000034
Figure FDA0003316524160000035
Figure FDA0003316524160000036
Figure FDA0003316524160000037
wherein, formula (7) is an optimization objective; fTThe comprehensive cost of purchasing electricity for the whole network is saved;
Figure FDA0003316524160000038
operating a standby plan for the conventional power generator set g time period t;
equations (8) - (10) are respectively a power balance constraint, a network transmission constraint and an operation reserve capacity constraint in the power grid operation class constraint; gos,g、Gos,n、Gos,bRespectively are power transfer distribution factors of a conventional power generator set g, a new energy power station n, a load node b and an operation section os;
Figure FDA0003316524160000039
the upper limit and the lower limit of the transmission capacity of the operation section os are respectively set; rsetThe reserve capacity requirement is met for the operation of the power grid;
equations (11) - (13) are respectively the power generation capacity constraint, the climbing capacity constraint and the operation standby constraint in the conventional power supply operation constraint; min { } represents taking the minimum value of each data.
8. An electric energy spot and operation standby combined transaction clearing system is characterized by comprising:
the clearing price calculating unit is used for acquiring the number of conventional power generating sets, the number of new energy power stations, the number of load nodes and the number of optimized time periods in a power grid, solving a power generation plan of each conventional power generating set in each time period by using a predefined power spot market clearing model without network constraint, and further measuring and calculating clearing prices of each conventional power generating set in each time period;
the standby virtual quotation calculation unit is used for calculating the running standby virtual quotation of each conventional power generator set in each time period according to the clearing price of each conventional power generator set in each time period;
and the total-network electricity purchasing comprehensive cost calculation unit is used for solving a minimum solution for a predefined combined clearing model of the electric energy and the running reserve under the operation constraints of the power grid and the conventional power supply by combining the clearing price and the running reserve virtual quotation of each conventional power supply generator set in each time period, wherein the minimum solution is the finally required total-network electricity purchasing comprehensive cost.
9. The spot and operational reserve combined transaction clearing system for electric energy according to claim 8, wherein the electric power spot market clearing model without network constraint is a function constructed with the power balance constraint, the conventional power generator set generating capacity constraint and the conventional power generator set climbing capacity constraint as constraint conditions and with the lowest electricity purchase cost as an optimization goal.
10. The electric energy spot and operation standby combined transaction clearing system according to claim 8, wherein the electric energy spot and operation standby combined clearing model is a function constructed by taking a power grid operation type constraint and a conventional power supply operation constraint as constraint conditions and taking the lowest comprehensive cost of power purchase of the whole power grid as an optimization target; wherein,
the power grid operation type constraints comprise power balance constraints, network transmission constraints and operation standby capacity constraints; the conventional power supply operation constraints comprise power generation capacity constraints, climbing capacity constraints and operation standby constraints.
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