CN113112288B - Day-ahead security check method and device considering surplus new energy and adjustable load increment transaction - Google Patents

Day-ahead security check method and device considering surplus new energy and adjustable load increment transaction Download PDF

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CN113112288B
CN113112288B CN202110310338.7A CN202110310338A CN113112288B CN 113112288 B CN113112288 B CN 113112288B CN 202110310338 A CN202110310338 A CN 202110310338A CN 113112288 B CN113112288 B CN 113112288B
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energy station
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CN113112288A (en
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吴烁民
陈振寰
丁恰
杨春祥
冷月
***
雷绅
司晓峰
吴锋
韩杰
崔剑
陈曦
沈阳
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State Grid Gansu Electric Power Co Ltd
NARI Group Corp
NARI Nanjing Control System Co Ltd
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NARI Group Corp
NARI Nanjing Control System Co Ltd
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Abstract

The invention discloses a day-ahead security check method considering surplus new energy and adjustable load increment transaction, which is suitable for security check of a load increment market. Determining a transaction period, and acquiring reporting information of both purchasing and selling parties, a power generation plan curve and a power prediction curve of a new energy station, and tidal current values and power transmission limit values of all power transmission sections and lines before transaction; performing data checking on the electric power declared by the seller in each transaction period; the method comprises the steps of establishing a day-ahead security check model comprehensively considering information such as market quotation, power grid network constraint and the like, synchronously generating a winning-capacity result considering both market economy fairness and safe and stable operation of the power grid in the check process, effectively supporting load increment market development and operation, assisting the power grid in guiding adjustable load to track new energy output in a market manner at a time interval when new energy consumption is difficult, and improving the economic benefit of the power grid.

Description

Day-ahead security check method and device considering surplus new energy and adjustable load increment transaction
Technical Field
The invention belongs to the technical field of electric power system dispatching automation, and particularly relates to a day-ahead security check method considering surplus new energy and adjustable load increment transaction, and further relates to a day-ahead security check device considering surplus new energy and adjustable load increment transaction.
Background
With the continuous improvement of the permeability of new energy, the problem of insufficient regulation capacity at the power generation side is obvious, and the new energy consumption situation is severe; the traditional means of ensuring the balance of power generation and utilization of a power grid and preferential consumption of new energy by means of coordination and optimization among resources on the power generation side is difficult to continue. The adjustable load is brought into the day-ahead scheduling plan optimization in part of regions, a load increment market is developed in the time period of new energy consumption difficulty, new energy stations with surplus new energy and the adjustable load are allowed to participate in the market, increment electric power and electricity price are reported in a centralized mode, and the market is cleared in a unified mode. The adjustable load is guided to track the output of the new energy through a market means, and the problems of insufficient adjusting resources on the power generation side and difficulty in new energy consumption can be solved.
However, since the actual load demand changes due to the fact that the adjustable load is bid in the load increment market, if the part of transactions are not checked safely, the load increment market clearing result is not matched with the actual operation condition of the power grid, the situations of line tide out-of-limit and the like can be caused, and the market clearing result is difficult to implement actually.
Disclosure of Invention
The invention aims to overcome the defects in the prior art, and provides a day-ahead security check method considering surplus new energy and adjustable load increment transaction.
In order to solve the technical problem, the invention provides a day-ahead security check method considering surplus new energy and adjustable load increment transaction, which comprises the following processes:
acquiring electric power and price which can be adjusted up in each transaction time period and are declared by an adjustable load participating in surplus new energy and adjustable load increment transaction, and electric power and price which can be sold in each transaction time period and are declared by a new energy station;
performing data check on the saleable electric power of the new energy station in each transaction period, and determining the final declared electric power value of the new energy station in each transaction period;
acquiring a day-ahead safety check model which takes the maximum total market residue as a target and meets balance constraint and power grid flow constraint of new energy stations and adjustable load increment distribution;
and calculating to obtain a day-ahead safety check result based on the electric power and the price which can be adjusted by the adjustable load in each transaction period and the final declared electric power and price of the new energy station in each transaction period by combining a day-ahead safety check model, wherein the day-ahead safety check result comprises the winning electric power of each new energy station and the winning electric power of each adjustable load.
Optionally, the data checking of the electric power which can be sold in each transaction time period declared by the new energy station, and determining the final declared electric power value of the new energy station in each transaction time period includes:
calculating to obtain the new energy surplus of the new energy station in each trading period based on the power generation planned value and the power predicted value of the new energy station in each trading period;
comparing the new energy surplus of the new energy station with the available power in any transaction period;
if the comparison result shows that the saleable electric power is larger than the surplus of the new energy, the check is not passed, whether the current time is smaller than the declaration deadline or not is judged, and if the current time is smaller than the declaration deadline, the new energy station is prompted to perform the declaration again; otherwise, setting the final declared power value in the transaction period as 0;
otherwise, the check is passed.
Optionally, the calculating, based on the planned power generation value and the predicted power value of the new energy station at each trading period, a new energy surplus of the new energy station at each trading period includes:
and the new energy surplus of the new energy station is the difference value between the power predicted value and the power generation planned value of the new energy station.
Optionally, the formula of the day-ahead security check model is expressed as:
an objective function:
Figure BDA0002989339300000031
constraint conditions are as follows:
Figure BDA0002989339300000032
0≤Pi,t≤Di,t
0≤Pld,t≤Dld,t
Figure BDA0002989339300000033
Figure BDA0002989339300000034
Figure BDA0002989339300000035
wherein, Pld,tIndicating that the ld-th adjustable load in the market wins the bidding power in the t period; priceld,tExpressing the price declared by the ld-th adjustable load in the t period; dld,tThe electric power value declared by the ld-th adjustable load in the t period is represented; ND represents the total number of adjustable loads in the market; pi,tIndicating that the new energy station i wins the bidding power in the time period t; pricei,tRepresenting the price declared by the new energy station i in the t period; di,tRepresenting the final reported power value of the new energy station i in the time period t; NW represents the total number of new energy stations; NT represents the number of time periods contained in the load increment market;
lk,tload incremental power for node k over time t; ARkRepresenting the adjustable load set hung at the node k, if the adjustable load set at the node k is empty, then lk,t＝0；POk,tThe total injection power of the new energy station at the node k in the time period t is obtained; AREkRepresenting a new energy station set hung at a node k, and if the new energy station set at the node k is empty, the PO is carried outk,t＝0； kjpAnd
Figure BDA0002989339300000041
respectively representing the upper and lower limits of the power flow of the branch kj; sk,j,tSensitivity of the injected power of node k to branch kj during time t; p is a radical ofkjRepresenting the load flow value of the branch kj before the market of the load increment is not developed; m is the total number of nodes in the power grid;
constraint condition formula 1 is a power balancing constraint in the new energy station and the adjustable load, and constraint condition formula 4 is a power flow constraint in the power grid.
Optionally, the method further includes:
and displaying the safety checking result in a visual mode before the day.
Correspondingly, the invention also provides a day-ahead security check device considering surplus new energy and adjustable load increment transaction, which comprises:
the reporting data acquisition module is used for acquiring the power and the price which can be adjusted upwards in each transaction time period and participate in the adjustable load reporting of the surplus new energy and adjustable load incremental transaction, and the power and the price which can be sold in each transaction time period and are reported by the new energy station;
the reported electric power checking module is used for performing data checking on the electric power which can be sold in each transaction time period reported by the new energy field station and determining a final reported electric power value of the new energy field station in each transaction time period;
the check model acquisition module is used for acquiring a day-ahead safety check model, the maximum market total remaining amount of the day-ahead safety check model is a target, and balance constraint and power grid flow constraint for new energy stations and adjustable load increment sending are met;
and the safety check calculation module is used for calculating and obtaining a day-ahead safety check result based on the electric power and the price which can be adjusted by the adjustable load in each transaction period and the final declared electric power and price of the new energy field station in each transaction period by combining a day-ahead safety check model, wherein the day-ahead safety check result comprises the bid-winning electric power of each new energy field station and the bid-winning electric power of each adjustable load.
Optionally, in the declared power check module, the data check of the saleable power of the new energy field station in each transaction period is performed to determine a final declared power value of the new energy field station in each transaction period, where the data check includes:
calculating to obtain the new energy surplus of the new energy station in each trading period based on the power generation planned value and the power predicted value of the new energy station in each trading period;
comparing the new energy surplus of the new energy station with the available power in any transaction period;
if the comparison result shows that the saleable electric power is larger than the surplus of the new energy, the check is not passed, whether the current time is smaller than the declaration deadline or not is judged, and if the current time is smaller than the declaration deadline, the new energy station is prompted to perform the declaration again; otherwise, setting the final declared power value in the transaction period as 0;
otherwise, the check is passed.
Optionally, the calculating, based on the planned power generation value and the predicted power value of the new energy station at each trading period, a new energy surplus of the new energy station at each trading period includes:
and the new energy surplus of the new energy station is the difference value between the power predicted value and the power generation planned value of the new energy station.
Optionally, the formula of the day-ahead security check model is expressed as:
an objective function:
Figure BDA0002989339300000051
constraint conditions are as follows:
Figure BDA0002989339300000052
0≤Pi,t≤Di,t
0≤Pld,t≤Dld,t
Figure BDA0002989339300000053
Figure BDA0002989339300000061
Figure BDA0002989339300000062
wherein, Pld,tIndicating that the ld-th adjustable load in the market wins the bidding power in the t period; priceld,tExpressing the price declared by the ld-th adjustable load in the t period; dld,tThe electric power value declared by the ld-th adjustable load in the t period is represented; ND represents the total number of adjustable loads in the market; pi,tIndicating that the new energy station i wins the bidding power in the time period t; pricei,tRepresenting the price declared by the new energy station i in the t period; di,tTo representThe new energy station i finally reports the electric power value in the t time period; NW represents the total number of new energy stations; NT represents the number of time periods contained in the load increment market;
lk,tload incremental power for node k over time t; ARkRepresenting the adjustable load set hung at the node k, if the adjustable load set at the node k is empty, then lk,t＝0；POk,tThe total injection power of the new energy station at the node k in the time period t is obtained; AREkRepresenting a new energy station set hung at a node k, and if the new energy station set at the node k is empty, the PO is carried outk,t＝0； kjpAnd
Figure BDA0002989339300000063
respectively representing the upper and lower limits of the power flow of the branch kj; sk,j,tSensitivity of the injected power of node k to branch kj during time t; p is a radical of formulakjRepresenting the load flow value of the branch kj before the market of the load increment is not developed; m is the total number of nodes in the power grid;
constraint condition formula 1 is a power balancing constraint in the new energy station and the adjustable load, and constraint condition formula 4 is a power flow constraint in the power grid.
Optionally, the system further comprises a visual display module for visually displaying the safety checking result in the day ahead.
Compared with the prior art, the invention has the following beneficial effects: according to the incremental power and the price declared by the buyer and the seller in the load increment market, the total market surplus is maximum (namely the difference between the adjustable load increment electricity purchasing cost and the new energy station increment electricity generating cost is maximum), the surplus power value limit of the new energy station and the system network safe operation limit are considered, the output of the buyer and the seller in the load increment market is safely checked, and the winning power result which can be checked and can be executed physically is synchronously generated after the checking is finished. In the time period when the new energy of the power grid is difficult to be consumed, effective technical support can be provided for the development of a load increment market, the power grid is assisted to guide the adjustable load to track the output of the new energy by means of the market, and the economic benefit of the power grid is improved.
Drawings
FIG. 1 is a detailed flow chart of the method of the present invention.
Detailed Description
The invention is further described below with reference to the accompanying drawings. The following examples are only for illustrating the technical solutions of the present invention more clearly, and the protection scope of the present invention is not limited thereby.
Example 1
The invention provides a day-ahead security check method considering surplus new energy and adjustable load increment transaction, which is suitable for security check of a load increment market. The trading period is 24 hours the day, and is divided into NT trading periods in total, the trade target in the market is the electric power of the new energy station, the buyer is an adjustable load main body with the up-regulation capability, and the seller is the new energy station with surplus electric power. The new energy station with surplus power means that the difference between the predicted power value of the new energy of the station and the power generation plan limit value of the station is larger than zero.
The invention relates to a day-ahead security check method considering surplus new energy and adjustable load increment transaction, which is shown in figure 1 and comprises the following steps:
step S1: and determining whether surplus new energy and adjustable load increment transaction needs to be carried out the next day. If the transaction needs to be carried out, the buyer (adjustable load) is informed to declare the power and price which can be adjusted upwards, and the seller (new energy station) declares the power and price which can be sold. Meanwhile, a power generation plan curve of the new energy station on the next day, a power prediction curve of the new energy station, and the tidal current values and power transmission limit values of all power transmission sections and lines in the power grid before incremental transaction is carried out are also required to be obtained.
Before the market declaration deadline T disclosed by the market operator, the buyer and the seller can fill, edit and submit the declaration information for unlimited times.
Step S2: and after the seller submits the declaration information, performing data check on the electric power declared by the new energy station in each transaction period in the transaction period based on the new energy surplus of the new energy station, and determining a final declaration electric power value in each transaction period.
Taking the new energy station i as an example, the specific verification steps are as follows:
setting a trading time period t to be 1, wherein the value range of t is 1-NT.
And secondly, calculating the new energy surplus of the new energy station i in the transaction time period t.
The new energy surplus Ei,tThe calculation formula is as follows:
Ei,t＝Fi,t-Θi,t
wherein, thetai,tFor the planned value of the power generation of the new energy station i, Fi,tAnd predicting the power of the new energy station i in the transaction time t.
Comparing new energy surplus Ei,tAnd its reported power value Di,tSize, if the new energy station i is not declared in the transaction period t, Di,t0. If D isi,t＞Ei,tIf the new energy station i reports that the power verification is not passed in the transaction time period t, the fourth step is carried out; otherwise, the data check of the transaction time interval t passes, and a fifth step is executed;
and fourthly, judging whether the current time is less than the declaration deadline T, if so, sending alarm information to the new energy station i to prompt the transaction period T that the declaration electric power verification fails, and reporting again in time. Otherwise set to Di,tRotating (c) when the value is 0;
if t is less than NT, t is t +1, go to execute ②; otherwise, the data check is finished.
Step S3: and establishing a day-ahead security check model with the maximum market total remaining (difference between the incremental electricity purchasing cost of the adjustable load and the incremental electricity generating cost of the new energy station) as a target, meeting balance constraint and power grid flow constraint of new energy stations and incremental electricity generation of the adjustable load, and ensuring that the market clearing result gives consideration to market economy and fairness and safe operation of the power grid. And solving the target to obtain the bid winning power of each new energy station and the bid winning power of each adjustable load.
And calculating to obtain the sensitivity factor of the injection power of each node in the power grid to the branch tide between the nodes according to the physical model of the actual power grid. In the power grid, some areas in the power grid are equivalent to 1 node, and the areas are connected through power transmission lines. This area is the node, the transmission line is the branch. The whole power grid is equivalent to a graph formed by connecting a plurality of nodes with each other. The physical distribution of the buyer is bound to be within a certain area, namely, hung on a certain node, and the physical position is generally fixed, which is determined by a physical model of the power grid.
Assuming that the power grid model has M nodes, the day-ahead security check model is as follows:
an objective function:
Figure BDA0002989339300000091
constraint conditions are as follows:
Figure BDA0002989339300000092
0≤Pi,t≤Di,t
0≤Pld,t≤Dld,t
Figure BDA0002989339300000093
Figure BDA0002989339300000094
Figure BDA0002989339300000095
wherein, Pld,tIndicating that the ld-th adjustable load in the market wins the bidding power in the t period; priceld,tExpressing the price declared by the ld-th adjustable load in the t period; dld,tThe electric power value declared by the ld-th adjustable load in the t period is represented; ND represents the total number of adjustable loads in the market; pi,tIndicating that the new energy station i wins the bidding power in the time period t; pricei,tIndicating that the new energy station i is at tThe price declared by the segment; di,tRepresenting the final reported power value of the new energy station i in the time period t; NW represents the total number of new energy stations; NT represents the number of time periods contained in the load increment market;
lk,tload delta power for node k over time t; ARkRepresenting the adjustable load set hung at the node k, if the adjustable load set at the node k is empty, then lk,t＝0；POk,tThe total injection power of the new energy station at the node k in the time period t is obtained; AREkRepresenting a new energy station set hung at a node k, and if the new energy station set at the node k is empty, the PO is carried outk,t＝0； kjpAnd
Figure BDA0002989339300000096
respectively representing the upper and lower limits of the power flow of the branch kj, wherein the limit value is determined by the physical characteristics of the branch kj; sk,j,tThe sensitivity factor of the injected power of the node k to the branch circuit kj in the period t means that the node k injects 1 unit of power to cause the load flow fluctuation of the circuit kj; p is a radical of formulakjIndicating the current value of the branch kj before the load increment market was not developed. The specific case of node j is not listed here since the power injected by the node on the other end of the branch is negligible in calculating the influence of node k on the load flow of branch kj by constraint 4.
The constraint condition formula 1 is a power balance constraint in the new energy station and the adjustable load, and the constraint condition formula 4 is a power flow constraint in the power grid. As described above, the areas are connected by the transmission line, and there is a limit in the transmission capacity determined by the physical characteristics of the line. In order to ensure safety, the tidal current value of the inter-regional power transmission line cannot exceed the allowable upper limit and the allowable lower limit. And the power injected into each node has a tidal current influence on a power transmission line in a power grid.
Step S4: and outputting and displaying day-ahead safety check results such as information of the bid winning power of each new energy station, the bid winning power of the adjustable load and the like in various visual modes such as graphs and tables.
According to the day-ahead security check method considering surplus new energy and adjustable load increment transaction, market optimization clearing is implicitly included in the day-ahead security check process, the maximum total market surplus is taken as a target, and a power grid model, an operation state and quotation information in the market are considered at the same time, so that clearing results for guaranteeing market subject benefits and power grid security and stability are formed. The method does not need a large amount of manpower participation, can effectively improve the load increment market development and operation stability, assists the power grid to guide the adjustable load to gradually participate in power grid adjustment in a market manner, and improves the power grid operation economy.
Example 2
Based on the same inventive concept as embodiment 1, the present invention provides a day-ahead security check device considering surplus new energy and adjustable load increment transaction, comprising:
the reporting data acquisition module is used for acquiring the power and the price which can be adjusted upwards in each transaction time period and participate in the adjustable load reporting of the surplus new energy and adjustable load incremental transaction, and the power and the price which can be sold in each transaction time period and are reported by the new energy station;
the reported electric power checking module is used for performing data checking on the electric power which can be sold in each transaction time period reported by the new energy field station and determining a final reported electric power value of the new energy field station in each transaction time period;
the check model acquisition module is used for acquiring a day-ahead safety check model, the maximum market total remaining amount of the day-ahead safety check model is a target, and balance constraint and power grid flow constraint for new energy stations and adjustable load increment sending are met;
and the safety check calculation module is used for calculating and obtaining a day-ahead safety check result based on the electric power and the price which can be adjusted by the adjustable load in each transaction period and the final declared electric power and price of the new energy field station in each transaction period by combining a day-ahead safety check model, wherein the day-ahead safety check result comprises the bid-winning electric power of each new energy field station and the bid-winning electric power of each adjustable load.
Optionally, in the declared power check module, the data check of the saleable power of the new energy field station in each transaction period is performed to determine a final declared power value of the new energy field station in each transaction period, where the data check includes:
calculating to obtain the new energy surplus of the new energy station in each trading period based on the power generation planned value and the power predicted value of the new energy station in each trading period;
comparing the new energy surplus of the new energy station with the available electric power in any transaction period;
if the comparison result shows that the saleable electric power is larger than the surplus of the new energy, the check is not passed, whether the current time is smaller than the declaration deadline or not is judged, and if the current time is smaller than the declaration deadline, the new energy station is prompted to perform the declaration again; otherwise, setting the final declared power value in the transaction period as 0;
otherwise, the check is passed.
Optionally, the calculating, based on the planned power generation value and the predicted power value of the new energy station at each trading period, a new energy surplus of the new energy station at each trading period includes:
and the new energy surplus of the new energy station is the difference value between the power predicted value and the power generation planned value of the new energy station.
Optionally, the formula of the day-ahead security check model is expressed as:
an objective function:
Figure BDA0002989339300000121
constraint conditions are as follows:
Figure BDA0002989339300000122
0≤Pi,t≤Di,t
0≤Pld,t≤Dld,t
Figure BDA0002989339300000123
Figure BDA0002989339300000124
Figure BDA0002989339300000125
wherein, Pld,tIndicating that the ld-th adjustable load in the market wins the bidding power in the t period; priceld,tExpressing the price declared by the ld-th adjustable load in the t period; dld,tThe electric power value declared by the ld-th adjustable load in the t period is represented; ND represents the total number of adjustable loads in the market; pi,tIndicating that the new energy station i wins the bidding power in the time period t; pricei,tRepresenting the price declared by the new energy station i in the t period; di,tRepresenting the final reported power value of the new energy station i in the time period t; NW represents the total number of new energy stations; NT represents the number of time periods contained in the load increment market;
lk,tload delta power for node k over time t; ARkRepresenting the adjustable load set hung at the node k, if the adjustable load set at the node k is empty, then lk,t＝0；POk,tThe total injection power of the new energy station at the node k in the time period t is obtained; AREkRepresenting a new energy station set hung at a node k, and if the new energy station set at the node k is empty, the PO is carried outk,t＝0； kjpAnd
Figure BDA0002989339300000126
respectively representing the upper and lower limits of the power flow of the branch kj; sk,j,tSensitivity of the injected power of node k to branch kj during time t; p is a radical ofkjRepresenting the load flow value of the branch kj before the market of the load increment is not developed; m is the total number of nodes in the power grid;
constraint condition formula 1 is a power balancing constraint in the new energy station and the adjustable load, and constraint condition formula 4 is a power flow constraint in the power grid.
Optionally, the system further comprises a visual display module for visually displaying the safety checking result in the day ahead.
The implementation scheme of each module in the device is shown in the implementation process of each step of the method in the embodiment 1.
As will be appreciated by one skilled in the art, embodiments of the present application may be provided as a method, system, or computer program product. Accordingly, the present application may take the form of an entirely hardware embodiment, an entirely software embodiment or an embodiment combining software and hardware aspects. Furthermore, the present application may take the form of a computer program product embodied on one or more computer-usable storage media (including, but not limited to, disk storage, CD-ROM, optical storage, and the like) having computer-usable program code embodied therein.
The present application is described with reference to flowchart illustrations and/or block diagrams of methods, apparatus (systems), and computer program products according to embodiments of the application. It will be understood that each flow and/or block of the flow diagrams and/or block diagrams, and combinations of flows and/or blocks in the flow diagrams and/or block diagrams, can be implemented by computer program instructions. These computer program instructions may be provided to a processor of a general purpose computer, special purpose computer, embedded processor, or other programmable data processing apparatus to produce a machine, such that the instructions, which execute via the processor of the computer or other programmable data processing apparatus, create means for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.
These computer program instructions may also be stored in a computer-readable memory that can direct a computer or other programmable data processing apparatus to function in a particular manner, such that the instructions stored in the computer-readable memory produce an article of manufacture including instruction means which implement the function specified in the flowchart flow or flows and/or block diagram block or blocks.
These computer program instructions may also be loaded onto a computer or other programmable data processing apparatus to cause a series of operational steps to be performed on the computer or other programmable apparatus to produce a computer implemented process such that the instructions which execute on the computer or other programmable apparatus provide steps for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.
The above description is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, several modifications and variations can be made without departing from the technical principle of the present invention, and these modifications and variations should also be regarded as the protection scope of the present invention.

Claims (8)

1. A day-ahead security check method considering surplus new energy and adjustable load increment transaction is characterized by comprising the following processes of:
acquiring electric power and price which can be adjusted up in each transaction time period and are declared by an adjustable load participating in surplus new energy and adjustable load increment transaction, and electric power and price which can be sold in each transaction time period and are declared by a new energy station;
performing data checking on the saleable electric power of the new energy station in each transaction period, and determining the final declared electric power value of the new energy station in each transaction period;
acquiring a day-ahead security check model which aims at the maximum total market surplus and meets the requirements of new energy stations, adjustable load increment distribution balance constraint and power grid flow constraint;
calculating to obtain a day-ahead security check result including the bid winning power of each new energy station and the bid winning power of each adjustable load based on the power and price which can be adjusted by the adjustable load in each transaction period and the final declared power and price of the new energy station in each transaction period by combining a day-ahead security check model;
the formula of the day-ahead security check model is expressed as follows:
an objective function:
Figure FDA0003624359860000011
constraint conditions are as follows:
Figure FDA0003624359860000012
0≤Pi,t≤Di,t
0≤Pld,t≤Dld,t
Figure FDA0003624359860000013
Figure FDA0003624359860000021
Figure FDA0003624359860000022
wherein, Pld,tIndicating that the ld-th adjustable load in the market wins the bidding power in the t period; priceld,tExpressing the price declared by the ld-th adjustable load in the t period; dld,tThe electric power value declared by the ld-th adjustable load in the t period is represented; ND represents the total number of adjustable loads in the market; pi,tIndicating that the new energy station i wins the bidding power in the time period t; pricei,tRepresenting the price declared by the new energy station i in the t period; di,tRepresenting the final reported power value of the new energy station i in the time period t; NW represents the total number of new energy stations; NT represents the number of time periods contained in the load increment market;
lk,tload incremental power for node k over time t; ARkRepresenting the adjustable load set hung at the node k, if the adjustable load set at the node k is empty, then lk,t＝0；POk,tThe total injection power of the new energy station at the node k in the time period t is obtained; AREkRepresenting a new energy station set hung at a node k, and if the new energy station set at the node k is empty, the PO is carried outk,t＝0； kjpAnd
Figure FDA0003624359860000023
respectively representing the upper and lower limits of the power flow of the branch kj; sk,j,tFor the injected power pair at node k during tThe sensitivity of branch kj; p is a radical of formulakjRepresenting the load flow value of the front branch kj of the market without developing load increment; m is the total number of nodes in the power grid;
constraint condition formula 1 is a power balancing constraint in the new energy station and the adjustable load, and constraint condition formula 4 is a power flow constraint in the power grid.
2. The method as claimed in claim 1, wherein the step of performing data checking on the saleable electric power of the new energy field station in each transaction period to determine the final declared electric power value of the new energy field station in each transaction period comprises:
calculating to obtain the new energy surplus of the new energy station in each trading period based on the power generation planned value and the power predicted value of the new energy station in each trading period;
comparing the new energy surplus of the new energy station with the available power in any transaction period;
if the comparison result shows that the saleable electric power is larger than the surplus of the new energy, the check is not passed, whether the current time is smaller than the declaration deadline or not is judged, and if the current time is smaller than the declaration deadline, the new energy station is prompted to perform the declaration again; otherwise, setting the final declared power value in the transaction period as 0;
otherwise, the check is passed.
3. The method as claimed in claim 2, wherein the step of calculating the new energy surplus of the new energy station in each trading period based on the planned power generation value and the predicted power value of the new energy station in each trading period comprises:
and the new energy surplus of the new energy station is the difference value between the power predicted value and the power generation planned value of the new energy station.
4. The method of claim 1, further comprising:
and displaying the safety checking result in a visual mode in the day ahead.
5. A day-ahead security check device considering surplus new energy and adjustable load increment transaction is characterized by comprising:
the reporting data acquisition module is used for acquiring the power and the price which can be adjusted upwards in each transaction time period and participate in the adjustable load reporting of the surplus new energy and adjustable load incremental transaction, and the power and the price which can be sold in each transaction time period and are reported by the new energy station;
the reported electric power checking module is used for performing data checking on the electric power which can be sold in each transaction time period reported by the new energy field station and determining a final reported electric power value of the new energy field station in each transaction time period;
the check model acquisition module is used for acquiring a day-ahead safety check model, the maximum market total remaining amount of the day-ahead safety check model is a target, and balance constraint and power grid flow constraint for new energy stations and adjustable load increment sending are met;
the safety check calculation module is used for calculating and obtaining day-ahead safety check results including the bid winning power of each new energy station and the bid winning power of each adjustable load based on the power and the price which can be adjusted by the adjustable load in each transaction period and the final declared power and price of the new energy station in each transaction period by combining a day-ahead safety check model;
the formula of the day-ahead security check model is expressed as follows:
an objective function:
Figure FDA0003624359860000041
constraint conditions are as follows:
Figure FDA0003624359860000042
0≤Pi,t≤Di,t
0≤Pld,t≤Dld,t
Figure FDA0003624359860000043
Figure FDA0003624359860000044
Figure FDA0003624359860000045
wherein, Pld,tIndicating that the ld-th adjustable load in the market wins the bidding power in the t period; priceld,tExpressing the price declared by the ld-th adjustable load in the t period; dld,tThe electric power value declared by the ld-th adjustable load in the t period is represented; ND represents the total number of adjustable loads in the market; pi,tIndicating that the new energy station i wins the bidding power in the time period t; pricei,tRepresenting the price declared by the new energy station i in the t period; di,tRepresenting the final reported power value of the new energy station i in the time period t; NW represents the total number of new energy stations; NT represents the number of time periods contained in the load increment market;
lk,tload delta power for node k over time t; ARkRepresenting the adjustable load set hung at the node k, if the adjustable load set at the node k is empty, then lk,t＝0；POk,tThe total injection power of the new energy station at the node k in the time period t is obtained; AREkRepresenting a new energy station set hung at a node k, and if the new energy station set at the node k is empty, the PO is carried outk,t＝0； kjpAnd
Figure FDA0003624359860000051
respectively representing the upper and lower limits of the power flow of the branch kj; sk,j,tSensitivity of the injected power of node k to branch kj during time t; p is a radical of formulakjIndicating non-launch of a load incremental marketThe power flow value of the front branch kj; m is the total number of nodes in the power grid;
constraint condition formula 1 is a power balancing constraint in the new energy station and the adjustable load, and constraint condition formula 4 is a power flow constraint in the power grid.
6. The device for day-ahead security check considering surplus new energy and adjustable load incremental transaction as claimed in claim 5, wherein the declaration electric power check module performs data check on the electric power which can be sold in each transaction period declared by the new energy station to determine the final declaration electric power value of the new energy station in each transaction period, and the device comprises:
calculating to obtain the new energy surplus of the new energy station in each trading period based on the power generation planned value and the power predicted value of the new energy station in each trading period;
comparing the new energy surplus of the new energy station with the available power in any transaction period;
if the comparison result is that the sellable electric power is larger than the new energy surplus, the check is not passed, whether the current time is smaller than the declaration deadline or not is judged, and if the current time is smaller than the declaration deadline, the new energy station is prompted to declare again; otherwise, setting the final declared power value in the transaction period as 0;
otherwise, the check is passed.
7. The device according to claim 6, wherein the reporting of the power check module calculates the new energy surplus of the new energy station in each trading period based on the planned power generation value and the predicted power value of the new energy station in each trading period, and comprises:
and the new energy surplus of the new energy station is the difference value between the power predicted value and the power generation planned value of the new energy station.
8. The day-ahead security check device considering surplus new energy and adjustable load increment transaction according to claim 5, further comprising a visual display module for visually displaying the day-ahead security check result.
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CN108711890A (en) * 2018-06-27 2018-10-26 广东电网有限责任公司 Ahead market goes out clearing method, system, device and computer readable storage medium
CN109256799A (en) * 2018-09-17 2019-01-22 大连理工大学 A kind of New-energy power system Optimization Scheduling based on Sample Entropy
CN109687442A (en) * 2018-12-27 2019-04-26 国网河南省电力公司经济技术研究院 A kind of new energy Optimal capacity of area's spot exchange transprovincially appraisal procedure and device

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN108711890A (en) * 2018-06-27 2018-10-26 广东电网有限责任公司 Ahead market goes out clearing method, system, device and computer readable storage medium
CN109256799A (en) * 2018-09-17 2019-01-22 大连理工大学 A kind of New-energy power system Optimization Scheduling based on Sample Entropy
CN109687442A (en) * 2018-12-27 2019-04-26 国网河南省电力公司经济技术研究院 A kind of new energy Optimal capacity of area's spot exchange transprovincially appraisal procedure and device

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