CN114256878B - Method, system, storage medium and server for configuring regional standby of wind power-containing system - Google Patents

Method, system, storage medium and server for configuring regional standby of wind power-containing system Download PDF

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Publication number
CN114256878B
CN114256878B CN202111595446.XA CN202111595446A CN114256878B CN 114256878 B CN114256878 B CN 114256878B CN 202111595446 A CN202111595446 A CN 202111595446A CN 114256878 B CN114256878 B CN 114256878B
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partition
standby
reserve
power
wind power
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CN114256878A (en
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李峰
凌晓波
毛文博
潘玲玲
徐鹏
王高琴
郑亚先
孙阳盛
苏凡
胡友琳
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State Grid Corp of China SGCC
China Electric Power Research Institute Co Ltd CEPRI
State Grid Shanghai Electric Power Co Ltd
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State Grid Corp of China SGCC
China Electric Power Research Institute Co Ltd CEPRI
State Grid Shanghai Electric Power Co Ltd
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    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J3/00—Circuit arrangements for ac mains or ac distribution networks
    • H02J3/38—Arrangements for parallely feeding a single network by two or more generators, converters or transformers
    • H02J3/381—Dispersed generators
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J3/00—Circuit arrangements for ac mains or ac distribution networks
    • H02J3/007—Arrangements for selectively connecting the load or loads to one or several among a plurality of power lines or power sources
    • H02J3/0075—Arrangements for selectively connecting the load or loads to one or several among a plurality of power lines or power sources for providing alternative feeding paths between load and source according to economic or energy efficiency considerations, e.g. economic dispatch
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J3/00—Circuit arrangements for ac mains or ac distribution networks
    • H02J3/38—Arrangements for parallely feeding a single network by two or more generators, converters or transformers
    • H02J3/46—Controlling of the sharing of output between the generators, converters, or transformers
    • H02J3/466—Scheduling the operation of the generators, e.g. connecting or disconnecting generators to meet a given demand
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J2300/00—Systems for supplying or distributing electric power characterised by decentralized, dispersed, or local generation
    • H02J2300/20—The dispersed energy generation being of renewable origin
    • H02J2300/28—The renewable source being wind energy
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E10/00—Energy generation through renewable energy sources
    • Y02E10/70—Wind energy
    • Y02E10/76—Power conversion electric or electronic aspects

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  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Supply And Distribution Of Alternating Current (AREA)

Abstract

A method for configuring subarea reserve of a wind power system, a storage medium and a server, wherein the method comprises the steps of obtaining subarea interconnection system data of the wind power system; selecting the worst scene of each partition based on the power sensitivity of the tie line by utilizing the partition interconnection system data containing the wind power system; calculating the maximum available standby of each partition based on the worst scene of each partition; calculating a reserve margin of each partition by the maximum available reserve of each partition; judging whether the reserve is sufficient according to the reserve margin of each partition, outputting a clearing plan if the reserve is sufficient, and if the reserve is insufficient, increasing the local reserve of the partition with insufficient reserve and returning to calculate the maximum available reserve of the corresponding partition again until the reserve is sufficient. The method converts the partition standby evaluation into the maximum available standby solving problem under the worst scene, has high calculation speed and good feasibility, can ensure that the safety standby requirement of each partition is met while the overload constraint of the connecting line is considered under the worst scene, and has better comprehensive performance.

Description

Method, system, storage medium and server for configuring regional standby of wind power-containing system
Technical Field
The invention belongs to the technical field of electric power spot markets, and particularly relates to a method, a system, a storage medium and a server for regional standby configuration of a wind power system.
Background
The electric power market comprises medium-and-long-term contracts and spot market, wherein the spot market can be divided into daily spot market, daily spot market and real-time market. In the electric power market environment, electric energy, standby service, frequency modulation service and the like are endowed with commodity attributes more, and various resources are guided to be optimally configured by price signals through game of various market main bodies.
After the spot market is fully started to operate, the power spot market gradually bears most of the functions of the dispatching automation system, so that the spot market clearing plan must meet the requirements of the system for auxiliary services such as standby, frequency modulation and the like on the premise of ensuring the safety of the power system. As the renewable energy duty cycle increases, the schedulable resources gradually decrease, and in order to cope with the fluctuation of renewable energy, the requirements of the system on standby are continuously increasing. The existing research on the standby market has achieved a lot of results, but the existing research has less consideration on the uncertainty of renewable energy sources, the uncertainty of high proportion renewable energy sources causes larger uncertainty of the transmission power of the regional tie lines, and how to accurately evaluate the reserve adequacy of each regional under the condition to ensure the safety and reliability of the power system is an important problem facing the power spot market.
Disclosure of Invention
The invention aims to solve the problems in the prior art and provide a method, a system, a storage medium and a server for partitioning standby configuration of a wind power system, wherein the method, the system, the storage medium and the server take wind power uncertainty and transmission power of a connecting line into consideration, so that an optimal configuration scheme of partitioning standby is obtained, the risk of insufficient standby is avoided, standby sharing among partitions is ensured, and economy and system safety are improved.
In order to achieve the above purpose, the present invention has the following technical scheme:
in a first aspect, a method for configuring regional standby of a wind-powered system is provided, including:
acquiring partition interconnection system data of a wind power system;
selecting the worst scene of each partition based on the power sensitivity of the tie line by utilizing the partition interconnection system data containing the wind power system;
calculating the maximum available standby of each partition based on the worst scene of each partition;
calculating a reserve margin of each partition by the maximum available reserve of each partition;
judging whether the reserve is sufficient according to the reserve margin of each partition, outputting a clearing plan if the reserve is sufficient, and if the reserve is insufficient, increasing the local reserve of the partition with insufficient reserve and returning to calculate the maximum available reserve of the corresponding partition again until the reserve is sufficient.
As a preferable scheme of the method for configuring the subarea reserve of the wind power system, in the step of acquiring subarea interconnection system data of the wind power system, the subarea interconnection system data comprises the following steps: system admittance matrix Y, node load P d The power P of the generator is injected into each node g Wind power P of each node w The system comprises a power generation unit standby quotation, a maximum standby capacity of the power generation unit, a total standby requirement of the system, minimum standby capacity values of all subareas, inter-subarea tie-line reactance and a power transmission limit.
Furthermore, as a preferred scheme of the method for configuring the subarea reserve of the wind power system, in the step of selecting the worst scenario of each subarea based on the sensitivity of the power of the tie line by utilizing the subarea interconnection system data of the wind power system, for the subarea interconnection system, the imaginary part of the admittance matrix is set as B, the node injection power vector is set as P, and the subarea tie line power is set as P l The tie-node association matrix is M, and the node voltage phase angle θ=b -1 P, the phase angle difference of the voltage of the nodes at two ends of the interconnecting line is delta theta l ＝MB - 1 P, tie line power P l ＝B l MB -1 P, whereinX 1 ,X 2 ,...,X nl Is a tie reactance; tie line power P l The sensitivity to the node injection power P is +.>Wherein S is n l ×(n b -1) a dimensional matrix; the balance node is replaced to calculate the sensitivity of the power of the connecting line to the injection power of the corresponding node, and S is expanded to n l ×n b A dimension matrix; from this, the kth tie line power is P l (k)＝P l0 (k)+S (k) ΔP, where S (k) For the kth row, P of the sensitivity matrix S l0 For initial link power, node injection power increase Δp=Δp g +ΔP w -ΔP d Wherein DeltaP g 、ΔP w 、ΔP d The increment of node generator power, wind power and load power, delta P w The effect on Pl depends on the sign of the corresponding element in the S matrix; wind farm G w1 、G w2 The nodes are respectively m 1 ,m 2 ，In->Is G w1 The amount of fluctuation of the output force is the minimum and the maximum,is G w2 Minimum and maximum fluctuation amounts of the output force; />The kth row and mth row of the sensitivity matrix S respectively 1 、m 2 Column element, then->The sign of (2) is (+, +), and the wind farm output increment is +.>When the power of the connecting line k reaches the maximum, the corresponding scene is the worst scene T corresponding to the limit constraint on the transmission power of the connecting line k, when ∈>When the symbols of (a) are (+, -), (-, +) and (-, -), the worst scenario T corresponding to the upper bound of transmission power of the link k is Is->For the lower bound of transmission power of tie-line k, < >>The signs of (1) are (+, +), (+, -), (-, +) and (-, -), and the corresponding worst scenes V are respectivelyIs->
Furthermore, as a preferred scheme of the method for configuring the subarea reserve of the wind power-containing system, in the step of calculating the maximum available reserve of each subarea based on the worst scene of each subarea, the subarea interconnection system containing wind power is provided with n z Partitions, n l Strip connecting line n b Individual nodes, Z r For the r-th partition, T r Representation and partition Z r Connected tie lines, each partitionThe maximum available reserve in the worst case scenario is calculated according to the following expression:
s.t.R′ j ＝R j ,j∈Z r
wherein f (Z r ) For zone Z r Negative value of the sum of local spares and spares called from other partitions, R' i S is the capacity called in the standby plan (l,i) Increasing sensitivity to transmission power of the connecting line for the power of the node i; r is R i Capacity purchased for the optimally scheduled aggregate; r is R zr,min For zone Z r Local standby set point in;in order to tie the power transmission limit of the line, the fluctuation amounts of wind power under the worst scene T and the worst scene V corresponding to the connecting line l are respectively；ΔP j Is the absence of power inside the partition caused by the fault.
Furthermore, as a preferred scheme of the method for configuring the regional reserve of the wind power-containing system, in the step of calculating the reserve margin of each regional by the maximum available reserve of each regional, a linear programming method is applied to calculate the reserve margin of each regional, and the calculation expression is as follows: zone Z is provided with r Is R zr,d Then define partition Z r Spare margin
Furthermore, as a preferred scheme of the method for configuring the subarea reserve of the wind-power-containing system, in the step of judging whether the reserve is sufficient according to the reserve margin of each subarea, the judging mode is as follows:
If lambda is r ≥0，-f(Z r )≥R zr,d Indicating that the corresponding partition is fully spared.
Furthermore, as a preferable scheme of the method for configuring the reserve of the subarea of the wind power system, if the reserve is insufficient, the local reserve of the subarea with the reserve is increased and the maximum available reserve of the corresponding subarea is calculated again until the reserve is sufficient, and the following calculation expression of the reserve optimizing configuration model is constructed:
a ij (p(R i )-p(R j ))≤0，i，j∈Z r
a ij ≥0，j≠i
in the standby optimal configuration model, the total cost is the minimum, ρ r For zone Z r Reserve price of R i Spare capacity for purchase from generator i; R i upper and lower limits for spare capacity; r is R sys Taking the maximum value of the standby demands of each partition as the total standby demands of the system; p (R) i ) For the reserve price of generator i, a ij For loosening variables, each unit in the subarea takes the spare price of the corresponding area, and if the cost of the unit selected in the local area is higher than the marginal price of the whole system due to the minimum spare constraint of the area, the highest price of the unit selected in the local area is the price of the corresponding area; if the constructed standby optimal configuration model has an optimal solution, outputting a corrected standby clearing plan; if the constructed standby optimal configuration model has no solution, the local standby of the standby insufficient partition is increased, and the calculation is performed again.
As a preferable scheme of the method for configuring the subarea reserve of the wind power system, the clearing plan is checked before the clearing plan is output.
Furthermore, as a preferred scheme of the method for configuring the subarea standby of the wind power system, the step of checking the clearing plan before outputting the clearing plan comprises the following steps: for the daily spot market, the transmission power constraint and the wind power uncertainty of the tie line are not considered in the clearing process, and a daily clearing plan is obtained; and (3) for the spot market in the day, evaluating the spare margin of each partition, comparing the corrected spare clearing plan with the spare clearing plan before correction for the partition with insufficient spare, outputting the corresponding clearing plan if the requirement of the constraint condition is met, otherwise, revising again.
In a second aspect, a system for partitioning a stand-by configuration of a wind-powered system is provided, comprising:
the partition interconnection system data acquisition module is used for acquiring partition interconnection system data of the wind power system;
the worst scene selection module is used for selecting the worst scene of each partition based on the power sensitivity of the tie line by utilizing the partition interconnection system data of the wind power system;
the maximum available standby calculation module is used for calculating the maximum available standby of each partition based on the worst scene of each partition;
The standby margin calculation module is used for calculating the standby margin of each partition by the maximum available standby of each partition;
and the clearing plan output module is used for judging whether the reserve is sufficient according to the reserve margin of each partition, outputting the clearing plan if the reserve is sufficient, and if the reserve is insufficient, increasing the local reserve of the partition with insufficient reserve and returning to calculate the maximum available reserve of the corresponding partition again until the reserve is sufficient.
As a preferable scheme of the partitioned standby configuration system of the wind power system, the partitioned interconnection system data acquired by the partitioned interconnection system data acquisition module comprises a system admittance matrix Y and loads P of all nodes d The power P of the generator is injected into each node g Wind power P of each node w Standby quotation of generator set and the most of generator setsLarge standby capacity, total system standby demand, minimum standby capacity for each partition, inter-partition link reactance, and power transfer limits.
Furthermore, as a preferable scheme of the partitioned standby configuration system of the wind power system, the worst scene selection module sets an admittance matrix imaginary part as B, a node injection power vector as P and a partitioned tie line power as P for the partitioned interconnection system l The tie-node association matrix is M, and the node voltage phase angle θ=b -1 P, the phase angle difference of the voltage of the nodes at two ends of the interconnecting line is delta theta l ＝MB -1 P, tie line power P l ＝B l MB -1 P, whereinX 1 ,X 2 ,...,X nl Is a tie reactance; tie line power P l The sensitivity to the node injection power P is +.>Wherein S is n l ×(n b -1) a dimensional matrix; the balance node is replaced to calculate the sensitivity of the power of the connecting line to the injection power of the corresponding node, and S is expanded to n l ×n b A dimension matrix; from this, the kth tie line power is P l (k)＝P l0 (k)+S (k) ΔP, where S (k) For the kth row, P of the sensitivity matrix S l0 For initial link power, node injection power increase Δp=Δp g +ΔP w -ΔP d Wherein DeltaP g 、ΔP w 、ΔP d The increment of node generator power, wind power and load power, delta P w P pair P l The influence of (2) depends on the sign of the corresponding element in the S matrix; wind farm G w1 、G w2 The nodes are respectively m 1 ,m 2 ，In->Is G w1 The amount of fluctuation of the output force is the minimum and the maximum,is G w2 Minimum and maximum fluctuation amounts of the output force; />The kth row and mth row of the sensitivity matrix S respectively 1 、m 2 Column element, then->The sign of (2) is (+, +), and the wind farm output increment is +.>When the power of the connecting line k reaches the maximum, the corresponding scene is the worst scene T corresponding to the limit constraint on the transmission power of the connecting line k, when ∈>When the symbols of (a) are (+, -), (-, +) and (-, -), the worst scenario T corresponding to the upper bound of transmission power of the link k is Is->For the lower bound of transmission power of tie-line k, < >>The signs of (++, +), (+, -), (-, +) and (-, -) are respectively +.> Is->
Furthermore, as a preferable scheme of the subarea standby configuration system of the wind power system, the subarea interconnection system of the wind power system is provided with n z Partitions, n l Strip connecting line n b Individual nodes, Z r For the r-th partition, T r Representation and partition Z r And the maximum available reserve calculation module calculates the maximum available reserve of each partition under the worst scene according to the following formula:
s.t.R′ j ＝R j ,j∈Z r
wherein f (Z r ) For zone Z r Negative value of the sum of local spares and spares called from other partitions, R' i S is the capacity called in the standby plan (l,i) Increasing sensitivity to transmission power of the connecting line for the power of the node i; r is R i Capacity purchased for the optimally scheduled aggregate; r is R zr,min For zone Z r Local standby set point in;in order to tie the power transmission limit of the line, the fluctuation amounts of wind power under the worst scene T and the worst scene V corresponding to the connecting line l are respectively; ΔP j Is the absence of power inside the partition caused by the fault.
Furthermore, as a preferable scheme of the wind power system partition standby configuration system, the standby margin calculation module calculates the standby margin of each partition by using a linear programming method, and the calculation expression is as follows:
Zone Z is provided with r Is R zr,d Then define partition Z r Spare margin
Furthermore, as a preferable scheme of the regional standby configuration system of the wind power system, the mode of judging whether the standby is sufficient by the outbound plan output module is as follows: if lambda is r ≥0，-f(Z r )≥R zr,d Indicating that the corresponding partition is fully spared.
Furthermore, as a preferable scheme of the partitioned standby configuration system of the wind power system, the clearing plan output module constructs a calculation expression of the standby optimal configuration model as follows:
a ij (p(R i )-p(R j ))≤0，i，j∈Z r
a ij ≥0，j≠i
in the standby optimal configuration model, the total cost is the minimum, ρ r For zone Z r Reserve price of R i Spare capacity for purchase from generator i; R i upper and lower limits for spare capacity; r is R sys Taking the maximum value of the standby demands of each partition as the total standby demands of the system; p (R) i ) For the reserve price of generator i, a ij For loosening variables, each unit in the subarea takes the spare price of the corresponding area, and if the cost of the unit selected in the local area is higher than the marginal price of the whole system due to the minimum spare constraint of the area, the highest price of the unit selected in the local area is the price of the corresponding area; if the constructed standby optimal configuration model has an optimal solution, outputting after correction Is used for standby clearing plan; if the constructed standby optimal configuration model has no solution, the local standby of the standby insufficient partition is increased, and the calculation is performed again.
As an optimal scheme of the regional standby configuration system of the wind power system, the clearing plan output module checks the clearing plan before outputting the clearing plan.
Furthermore, as a preferable scheme of the regional standby configuration system of the wind power system, the step of checking the clearing plan before the clearing plan output module outputs the clearing plan comprises the following steps: for the daily spot market, the transmission power constraint and the wind power uncertainty of the tie line are not considered in the clearing process, and a daily clearing plan is obtained; and (3) for the spot market in the day, evaluating the spare margin of each partition, comparing the corrected spare clearing plan with the spare clearing plan before correction for the partition with insufficient spare, outputting the corresponding clearing plan if the requirement of the constraint condition is met, otherwise, revising again.
In a third aspect, a computer readable storage medium is provided, where a computer program is stored, where the computer program, when executed by a processor, implements the method for configuring backup partitions of a wind power system.
In a fourth aspect, a server is provided, including a memory, a processor, and a computer program stored in the memory and executable on the processor, where the processor implements the method for configuring backup partitions of a wind power system when the computer program is executed.
Compared with the prior art, the first aspect of the invention has at least the following beneficial effects: and selecting the worst scene of each partition according to the power sensitivity of the connecting line, and converting the partition standby evaluation into the maximum available standby solving problem under the worst scene. By using the interval method, only the change interval of the wind power prediction error is needed, and the accurate probability distribution characteristic is not needed to be mastered, so that the difficulty of insufficient variable information in practice is overcome, a large amount of calculation needed by the sampling method is avoided, and the analysis speed is improved. According to the method, the worst scene of the maximum line load rate under the condition of uncertain wind power is considered, so that the calculation speed is high, and the feasibility is good. Simulation of an example shows that the backup total cost can be reduced in the past under the condition of not considering wind power uncertainty, but the sufficient backup of each partition can not be ensured in all scenes; the method provided by the invention considers wind power uncertainty to carry out regional standby evaluation and optimization, can ensure that the safety standby requirement of each region is met while the overload constraint of the tie line is considered in the worst scene, improves the safety and economy of the system under the condition of wind power output fluctuation, and has better comprehensive performance.
Furthermore, the method of the application aims at minimum total cost of the subareas for the system with insufficient subarea standby, takes constraint such as subarea standby requirement, minimum local standby, transmission power of a connecting line and the like into consideration, establishes a subarea standby optimizing model, further obtains the optimal configuration of subarea standby, corrects the daily clearing plan and obtains the corrected daily clearing plan.
It will be appreciated that the advantages of the second to fourth aspects may be found in the relevant description of the first aspect and are not repeated here.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings that are needed in the embodiments or the description of the prior art will be briefly described below, it being obvious that the drawings in the following description are only some embodiments of the present application, and that other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
FIG. 1 is a flow chart of a method for partitioning standby configuration of a wind-powered system according to the present application;
FIG. 2 is a block diagram of a partitioned standby configuration system for a wind power system according to the present application.
Detailed Description
In the following description, for purposes of explanation and not limitation, specific details are set forth, such as particular system configurations, techniques, etc. in order to provide a thorough understanding of embodiments of the present application. It will be apparent, however, to one skilled in the art that the present application may be practiced in other embodiments that depart from these specific details. In other instances, detailed descriptions of well-known systems, devices, circuits, and methods are omitted so as not to obscure the description of the present application with unnecessary detail.
Example 1
Referring to fig. 1, fig. 1 shows a main step flow of a partition standby configuration method of a wind power system according to an embodiment of the present invention, and according to fig. 1, the partition standby configuration method of the present invention mainly includes the following steps:
s1, acquiring partition interconnection system data of a wind power system;
s2, selecting the worst scene of each partition based on the power sensitivity of the tie line by utilizing the partition interconnection system data containing the wind power system;
s3, calculating the maximum available reserve of each partition based on the worst scene of each partition;
s4, calculating the reserve margin of each partition by the maximum available reserve of each partition;
and S5, judging whether the reserve is sufficient according to the reserve margin of each partition, outputting a clearing plan if the reserve is sufficient, and if the reserve is insufficient, increasing the local reserve of the partition with insufficient reserve and returning to calculate the maximum available reserve of the corresponding partition again until the reserve is sufficient.
In step S1, the partition interconnection system data of the wind power system includes: system admittance matrix Y, node load P d Injected generator power P g Wind power P w The method comprises the steps of carrying out a first treatment on the surface of the Standby quotation and maximum standby capacity of the generator set; the total standby requirement of the system, the minimum standby capacity of each subarea, the inter-subarea tie line reactance and the power transmission limit; let n be the interconnected system of wind-powered electricity generation subregion z Partitions, n l Strip connecting line n b Individual nodes, Z r For the r-th partition, T r Representation and partition Z r And (5) connecting the connecting wires.
In one embodiment, step S2 of selecting the worst scenario of each partition based on the tie power sensitivity by using the partition interconnection system data of the wind power system specifically includes:
for partition interconnectionsThe system is provided with an admittance matrix imaginary part as B, a node injection power vector as P and a partition interconnecting line power as P l If the tie-node association matrix is M, the node voltage phase angle θ=b -1 P, the phase angle difference of the voltage of the nodes at two ends of the interconnecting line is delta theta l ＝MB -1 P, tie line power P l ＝B l MB -1 P, whereinX 1 ,X 2 ,...,X nl Is a tie reactance; tie line power P l The sensitivity to the node injection power P is +.>Wherein S is n l ×(n b -1) a dimensional matrix, since the phase angle of the balance node is assumed to be zero in the power flow calculation, the influence of the change of the injection power on the tie-line power cannot be considered, at this time, the balance node needs to be replaced to calculate the sensitivity of the tie-line power to the injection power of the corresponding node, and S is extended to n l ×n b A dimension matrix; from this, it can be deduced that the kth link power is P l (k)＝P l0 (k)+S (k) ΔP, where S (k) For the kth row, P of the sensitivity matrix S l0 For initial link power, node injection power increase Δp=Δp g +ΔP w -ΔP d ，ΔP g 、ΔP w 、ΔP d The increment of node generator power, wind power and load power, delta P w P pair P l The influence of (2) depends on the sign of the corresponding element in the S matrix;
wind farm G w1 、G w2 The nodes are respectively m 1 ,m 2 ， Is G w1 The amount of fluctuation of the output force is the minimum and the maximum,is G w2 Minimum and maximum fluctuation amounts of the output force; />The kth row and mth row of the sensitivity matrix S respectively 1 、m 2 Column element, then->The sign of (2) is (+, +), and the wind farm output increment is +.>When the power of the connecting line k reaches the maximum, the corresponding scene is the worst scene T corresponding to the limit constraint on the transmission power of the connecting line k, when ∈>When the symbols of (a) are (+, -), (-, +) and (-, -), the worst scenario T corresponding to the upper bound of transmission power of the link k isIs->For the lower bound of transmission power of tie-line k, < >>The symbols of (1) are (+, +), (+, -), (-, +) and (-, -) respectively the worst scene VIs->
In one embodiment, step S3 calculates the maximum available reserve for each partition comprising:
for the daily spot market clearing plan, the solving process of the maximum available reserve of each partition under the worst scene can be described as follows according to the latest wind power prediction data:
s.t.R′ j ＝R j ,j∈Z r
wherein f (Z r ) For zone Z r Negative value of the sum of local spares and spares called from other partitions, R' i S is the capacity called in the standby plan (l,i) Increasing sensitivity to transmission power of the line/for node i power; constraint 1 represents partition Z r When the most serious faults occur in the system, local standby of the partition should be called first, and if the capacity is insufficient, units in other areas are scheduled; constraint 2 indicates that optimally scheduled unit reserve R 'when partition reserve evaluation' i Cannot exceed the purchased capacity R i The method comprises the steps of carrying out a first treatment on the surface of the Constraint 3 represents partition Z r The local reserve in should be greater than the set value R zr,min The method comprises the steps of carrying out a first treatment on the surface of the Items 4 and 5 are constraints on the transmission power of the tie line l,for the link power transmission limit, < >>The fluctuation amounts of wind power under the worst scene T and the worst scene V corresponding to the connecting line l are respectively; ΔP j Is the absence of power inside the partition caused by the fault.
Step S4, when the reserve margin of each partition is calculated from the maximum available reserve of each partition, a linear programming method is applied, and the method is specifically:
zone Z is provided with r Is R zr,d Then partition Z may be defined r Spare margin
Step S5 is to determine if the redundancy is sufficient according to the redundancy margin of each partition, if lambda r ≥0，-f(Z r )≥R zr,d Indicating that the corresponding partition is sufficient for standby; if all the subareas are sufficient in standby, the existing standby plan is indicated to be feasible, otherwise, the existing plan is corrected. Further, in one embodiment, step S5 establishes a standby optimal configuration model for the standby deficient partition and modifies the initial solution of the standby deficiency, and verifies the economy and safety of the optimal configuration solution.
Specifically, the implementation process of establishing a standby optimal configuration model and modifying an initial scheme with insufficient standby is as follows: when the latest electric predicted value is obtained in the day, the reserve margin of each partition is evaluated, if the reserve margin lambda of the partition exists r <0，r＝1,2,…,n z The need to increase the purchase of local spares or other partition spares, and the sparing optimization configuration model taking wind power uncertainty into account is described as follows:
a ij (p(R i )-p(R j ))≤0，i，j∈Z r
a ij ≥0，j≠i
in the standby optimal configuration model, the total cost is the minimum, ρ r For zone Z r Reserve price of R i Spare capacity for purchase from generator i; R i upper and lower limits for spare capacity; r is R sys The initial value of the total standby requirement of the system can be the maximum value of the standby requirement of each partition; the last 3 are constraints on the reserve price, p (R i ) For the reserve price of generator i, a ij For loosening variables, each unit in the subarea takes the reserve price of the corresponding area, if the cost of the unit selected in the local area is higher than the marginal price of the whole system due to the minimum reserve constraint of the area, the unit is locallyThe highest quotation of the unit is selected as the price of the corresponding region in the region; if the optimal solution exists in the optimization model, outputting a corrected standby clearing plan; if the optimization model has no solution, the local reserve of the reserve insufficient partition needs to be further increased and recalculated.
The implementation process of the economical efficiency and the safety of the verification and optimization configuration scheme is as follows:
the transmission power constraint and the wind power uncertainty of the tie line are temporarily not considered when the daily spot market is cleared, and a daily clearing plan is obtained; and evaluating the reserve margin of each partition in the spot market in the day, namely calculating the maximum available reserve and the corresponding reserve margin of each partition in the worst scene, correcting the partition with insufficient reserve by adopting an optimization model to obtain a new clearing plan, namely obtaining corrected total reserve cost and the reserve margin of each partition, comparing the corrected total reserve cost and the corrected reserve margin of each partition with the corrected reserve margin, verifying the validity of the corresponding scheme, outputting the corresponding clearing plan if the requirements of various constraint conditions are met, and otherwise, revising the corresponding clearing plan again.
Example 2
Referring to fig. 2, the embodiment of the invention further provides a partition standby configuration system for a wind power system, which comprises a partition interconnection system data acquisition module 1, a worst scene selection module 2, a maximum available standby calculation module 3, a standby margin calculation module 4 and a clearing plan output module 5, wherein the main functions and purposes of the modules are as follows:
the partition interconnection system data acquisition module 1 is used for acquiring partition interconnection system data of the wind power system;
The worst scene selection module 2 is used for selecting the worst scene of each partition based on the power sensitivity of the tie line by utilizing the partition interconnection system data of the wind power system;
a maximum available standby calculation module 3, configured to calculate a maximum available standby of each partition based on a worst scenario of each partition;
a standby margin calculating module 4, configured to calculate a standby margin of each partition from the maximum available standby of each partition;
and the outbound plan output module 5 is used for judging whether the reserve is sufficient according to the reserve margin of each partition, outputting the outbound plan if the reserve is sufficient, and if the reserve is insufficient, increasing the local reserve of the partition with insufficient reserve and returning to calculate the maximum available reserve of the corresponding partition again until the reserve is sufficient.
Further, the partition interconnection system data acquired by the partition interconnection system data acquisition module 1 includes a system admittance matrix Y; load P of each node d Injected generator power P g Wind power P w The method comprises the steps of carrying out a first treatment on the surface of the Standby quotation and maximum standby capacity of the generator set; total system standby demand, minimum standby capacity for each partition, inter-partition link reactance, and power transfer limits.
In this embodiment, the worst scenario selection module 2 sets, for the partition interconnection system, the imaginary part of the admittance matrix as B, the node injection power vector as P, and the partition tie line power as P l The tie-node association matrix is M, and the node voltage phase angle θ=b -1 P, the phase angle difference of the voltage of the nodes at two ends of the interconnecting line is delta theta l ＝MB -1 P, tie line power P l ＝B l MB -1 P, whereinX 1 ,X 2 ,...,X nl Is a tie reactance; tie line power P l The sensitivity to the node injection power P is +.>Wherein S is n l ×(n b -1) a dimensional matrix; the balance node is replaced to calculate the sensitivity of the power of the connecting line to the injection power of the corresponding node, and S is expanded to n l ×n b A dimension matrix; from this, the kth tie line power is P l (k)＝P l0 (k)+S (k) ΔP, where S (k) For the kth row, P of the sensitivity matrix S l0 For initial link power, node injection power increase Δp=Δp g +ΔP w -ΔP d Wherein DeltaP g 、ΔP w 、ΔP d The increment of node generator power, wind power and load power, delta P w P pair P l The influence of (2) depends on the sign of the corresponding element in the S matrix; wind farm G w1 、G w2 The nodes are respectively m 1 ,m 2 ，/>In->Is G w1 Force minimum and maximum fluctuation amount, +.>Is G w2 Minimum and maximum fluctuation amounts of the output force; />The kth row and mth row of the sensitivity matrix S respectively 1 、m 2 Column element, then->The sign of (4) is (+, +), and the output increment of the wind power plant isWhen the power of the connecting line k reaches the maximum, the corresponding scene is the worst scene T corresponding to the limit constraint on the transmission power of the connecting line k, when ∈>When the symbols of (a) are (+, -), (-, +) and (-, -), the worst scenario T corresponding to the upper bound of transmission power of the link k is +. >Is->For the tie-line k transmit power lower bound constraint,the signs of (a) are (+, +), (+, -), (-, +) and (-, -), whereCorresponding to the worst scenes V are respectivelyIs->
In this embodiment, the wind power-containing partition interconnection system is provided with n z Partitions, n l Strip connecting line n b Individual nodes, Z r For the r-th partition, T r Representation and partition Z r The maximum available reserve calculation module 3 calculates the maximum available reserve of each partition in the worst scenario according to the following expression:
s.t.R′ j ＝R j ,j∈Z r
wherein f (Z r ) For zone Z r Negative value of the sum of local spares and spares called from other partitions, R' i S is the capacity called in the standby plan (l,i) Increasing sensitivity to transmission power of the connecting line for the power of the node i; r is R i Purchased containers for optimally scheduled unitsAn amount of; r is R zr,min For zone Z r Local standby set point in;in order to tie the power transmission limit of the line, the fluctuation amounts of wind power under the worst scene T and the worst scene V corresponding to the connecting line l are respectively; ΔP j Is the absence of power inside the partition caused by the fault.
Further, the reserve margin calculating module 4 calculates the reserve margin of each partition by using a linear programming method, and the calculation expression is as follows: zone Z is provided with r Is R zr,d Then define partition Z r Spare margin
In the present embodiment, the way in which the outbound plan output module 5 determines whether or not the standby is sufficient is as follows:
if lambda is r ≥0，-f(Z r )≥R zr,d Indicating that the corresponding partition is fully spared.
Further, the outbound plan output module 5 constructs a calculation expression of the standby optimal configuration model as follows:
/>
a ij (p(R i )-p(R j ))≤0，i，j∈Z r
a ij ≥0，j≠i
in the standby optimal configuration model, the total cost is the minimum, ρ r For zone Z r Reserve price of R i Spare capacity for purchase from generator i; R i upper and lower limits for spare capacity; r is R sys Taking the maximum value of the standby demands of each partition as the total standby demands of the system; p (R) i ) For the reserve price of generator i, a ij For loosening variables, each unit in the subarea takes the spare price of the corresponding area, and if the cost of the unit selected in the local area is higher than the marginal price of the whole system due to the minimum spare constraint of the area, the highest price of the unit selected in the local area is the price of the corresponding area; if the constructed standby optimal configuration model has an optimal solution, outputting a corrected standby clearing plan; if the constructed standby optimal configuration model has no solution, increasing the time of the standby insufficient partitionReserve, recalculate.
In this embodiment, the verification of the clearing plan before the clearing plan is output by the clearing plan output module 5 includes the steps of: for the daily spot market, the transmission power constraint and the wind power uncertainty of the tie line are not considered in the clearing process, and a daily clearing plan is obtained; and (3) for the spot market in the day, evaluating the spare margin of each partition, comparing the corrected spare clearing plan with the spare clearing plan before correction for the partition with insufficient spare, outputting the corresponding clearing plan if the requirement of the constraint condition is met, otherwise, revising again.
The prior art either does not consider the change of new energy, and configures for standby according to the predicted value; or the constraint of the transmission power of the connecting line is not considered, so that the actual subarea is at risk of insufficient standby power. If the change of the new energy is not considered, the standby is configured according to the predicted value, and the problem that the actual operation working condition is greatly different from the envisaged working condition exists, so that standby redundancy or deficiency is caused, and the safety and the economy of the operation plan of the power system are affected. If tie power constraints are not taken into account, there is a potential risk that the partition will be under-standby due to blocking problems, although the overall standby of the system will be up to demand.
The method considers the influence of uncertainty of new energy, determines the worst scene according to the power sensitivity of the connecting line, and carries out regional standby evaluation and optimization of the wind power system based on the latest predicted wind speed and the worst scene.
Example 3
A computer readable storage medium storing a computer program which, when executed by a processor, implements the wind power system partition backup configuration method of embodiment 1. The computer program comprises computer program code which may be in source code form, object code form, executable file or in some intermediate form, etc. The computer readable storage medium may include: any entity or device, medium, usb disk, removable hard disk, magnetic disk, optical disk, computer memory, read-only memory, random access memory, electrical carrier wave signals, telecommunications signals, software distribution media, and the like capable of carrying the computer program code. For convenience of description, the foregoing disclosure shows only those parts relevant to the embodiments of the present invention, and specific technical details are not disclosed, but reference is made to the method parts of the embodiments of the present invention. The corresponding computer readable storage medium is non-transitory and can be stored in a storage device formed by various electronic devices, so as to implement the execution procedure described in the method according to the embodiment of the present invention.
Example 4
A server comprising a memory, a processor and a computer program stored in the memory and executable on the processor, the processor implementing the wind power system partition backup configuration method of embodiment 1 when the computer program is executed. Also, for convenience of explanation, only the portions related to the embodiments of the present invention are shown, and specific technical details are not disclosed, please refer to the method portions of the embodiments of the present invention.
It will be appreciated by those skilled in the art that embodiments of the present invention may be provided as a method, system, or computer program product. Accordingly, the present invention may take the form of an entirely hardware embodiment, an entirely software embodiment or an embodiment combining software and hardware aspects. Furthermore, the present invention 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 invention is described with reference to flowchart illustrations and/or block diagrams of methods, apparatus (systems) and computer program products according to embodiments of the invention. It will be understood that each flowchart and/or block of the flowchart illustrations and/or block diagrams, and combinations of flowcharts 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 corresponding 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.
Finally, it should be noted that: the above embodiments are only for illustrating the technical aspects of the present invention and not for limiting the same, and although the present invention has been described in detail with reference to the above embodiments, it should be understood by those of ordinary skill in the art that: modifications and equivalents may be made to the specific embodiments of the invention without departing from the spirit and scope of the invention, which is intended to be covered by the claims.

Claims (18)

1. The method for configuring the subarea standby of the wind-powered system is characterized by comprising the following steps of:
acquiring partition interconnection system data of a wind power system;
selecting the worst scene of each partition based on the power sensitivity of the tie line by utilizing the partition interconnection system data containing the wind power system; for a partitioned interconnect system, tie line power P l ＝B l MB -1 P, itWherein B is the imaginary part of the admittance matrix, P is the node injection power vector, M is the tie-node correlation matrix,X 1 ,X 2 ,...,X nl is a tie reactance;
the sensitivity of the tie line power Pl to the node injection power P isWherein S is n l ×(n b -1) a dimensional matrix; node voltage phase angle θ=b -1 P, the phase angle difference of the voltage of the nodes at two ends of the interconnecting line is delta theta l ＝MB -1 P；
The balance node is replaced to calculate the sensitivity of the power of the connecting line to the injection power of the corresponding node, and S is expanded to n l ×n b Dimension matrix, n l Number of tie lines for partition interconnection system, n b If the number of nodes of the partition interconnection system is the number, the power of the kth connecting line is P l (k)＝P l0 (k)+S (k) ΔP, where S (k) For the kth row, P of the sensitivity matrix S l0 For initial link power, node injection power increase Δp=Δp g +ΔP w -ΔP d Wherein DeltaP g 、ΔP w 、ΔP d The increment of node generator power, wind power and load power, delta P w P pair P l The influence of (2) depends on the sign of the corresponding element in the S matrix; wind farm G w1 、G w2 The nodes are respectively m 1 ,m 2 ，In->Is G w1 Force minimum and maximum fluctuation amount, +.>Is G w2 Minimum and maximum fluctuation amounts of the output force;
the kth row and mth row of the sensitivity matrix S respectively 1 、m 2 Column element, then->The sign of (2) is (+, +), and the wind farm output increment is +.>When the power of the connecting line k reaches the maximum, the corresponding scene is the worst scene T corresponding to the limit constraint on the transmission power of the connecting line k, when ∈>When the symbols of (a) are (+, -), (-, +) and (-, -), the worst scenario T corresponding to the upper bound of transmission power of the link k is +.>Is->
For the tie-line k transmit power lower bound constraint,the signs of (++, +), (+, -), (-, +) and (-, -) are respectively +.>Is->
Calculating the maximum available standby of each partition based on the worst scene of each partition;
calculating a reserve margin of each partition by the maximum available reserve of each partition;
judging whether the reserve is sufficient according to the reserve margin of each partition, outputting a clearing plan if the reserve is sufficient, and if the reserve is insufficient, increasing the local reserve of the partition with insufficient reserve and returning to calculate the maximum available reserve of the corresponding partition again until the reserve is sufficient.
2. The method for configuring a partition standby of a wind power system according to claim 1, wherein in the step of acquiring partition interconnection system data of the wind power system, the partition interconnection system data includes: system admittance matrix Y, node load P d The power P of the generator is injected into each node g Wind power P of each node w The system comprises a power generation unit standby quotation, a maximum standby capacity of the power generation unit, a total standby requirement of the system, minimum standby capacity values of all subareas, inter-subarea tie-line reactance and a power transmission limit.
3. The method according to claim 1, wherein in the step of calculating the maximum available reserve for each partition based on the worst scenario for each partition, the partition interconnection system has n z Each partition, Z r For the r-th partition, T r Representation and partition Z r The maximum available reserve for each partition in the worst scenario for the connected tie line is calculated as follows:
s.t.R′ j ＝R j ,j∈Z r
wherein f (Z r ) For zone Z r Negative value of the sum of local spares and spares called from other partitions, R i ' is the volume called in the standby plan, S (l,i) Increasing sensitivity to transmission power of the connecting line for the power of the node i; r is R i Capacity purchased for the optimally scheduled aggregate; r is R zr,min For zone Z r Local standby set point in;in order to tie the power transmission limit of the line, the fluctuation amounts of wind power under the worst scene T and the worst scene V corresponding to the connecting line l are respectively; ΔP j Is the absence of power inside the partition caused by the fault.
4. A method for configuring a wind power system partition redundancy according to claim 3, wherein in said step of calculating a redundancy margin for each partition from the maximum available redundancy for each partition, a linear programming method is applied to calculate a redundancy margin for each partition, the calculation expression being as follows: zone Z is provided with r Is R zr,d Then define partition Z r Spare margin
5. The method for configuring the reserve of a partition of a wind power system according to claim 4, wherein in the step of judging whether the reserve is sufficient according to the reserve margin of each partition, the judgment is as follows:
if lambda is r ≥0，-f(Z r )≥R zr,d Indicating that the corresponding partition is fully spared.
6. The method according to claim 5, wherein in the step of increasing the local reserve of the reserve-deficient partition and returning to calculate the maximum available reserve of the corresponding partition until the reserve is sufficient, the following calculation expression of the reserve optimizing configuration model is constructed:
a ij (p(R i )-p(R j ))≤0，i，j∈Z r
a ij ≥0，j≠i
in the standby optimal configuration model, the total cost is the minimum, ρ r For zone Z r Reserve price of R i Spare capacity for purchase from generator i;R i upper and lower limits for spare capacity; r is R sys Taking the maximum value of the standby demands of each partition as the total standby demands of the system; p (R) i ) For the reserve price of generator i, a ij For loosening variables, each unit in the subarea takes the spare price of the corresponding area, and if the cost of the unit selected in the local area is higher than the marginal price of the whole system due to the minimum spare constraint of the area, the highest price of the unit selected in the local area is the price of the corresponding area; if the constructed standby optimal configuration model has an optimal solution, outputting a corrected standby clearing plan; if the constructed standby optimal configuration model has no solution, the local standby of the standby insufficient partition is increased, and the calculation is performed again.
7. The method for configuring a sub-area backup of a wind power system according to claim 1, wherein the clearing plan is checked before the clearing plan is outputted.
8. The method for configuring a wind power system partition backup according to claim 7, wherein the step of verifying the clearing plan before outputting the clearing plan comprises: for the daily spot market, the transmission power constraint and the wind power uncertainty of the tie line are not considered in the clearing process, and a daily clearing plan is obtained; and (3) for the spot market in the day, evaluating the spare margin of each partition, comparing the corrected spare clearing plan with the spare clearing plan before correction for the partition with insufficient spare, and outputting the clearing plan if the requirement of the constraint condition is met, otherwise, revising again.
9. A zoned backup configuration system for a wind-powered system, comprising:
the partition interconnection system data acquisition module is used for acquiring partition interconnection system data of the wind power system;
the worst scene selection module is used for selecting the worst scene of each partition based on the power sensitivity of the tie line by utilizing the partition interconnection system data of the wind power system; the worst scenario selection module selects the worst scenario of each partition based on the link power sensitivity in the following manner: for a partitioned interconnect system, tie line power P l ＝B l MB -1 P, wherein B is the imaginary part of the admittance matrix, P is the node injection power vector, M is the tie-node correlation matrix,X 1 ,X 2 ,...,X nl is a tie reactance; tie line power P l The sensitivity to the node injection power P is +.>Wherein S is n l ×(n b -1) a dimensional matrix; node voltage phase angle θ=b -1 P, the phase angle difference of the voltage of the nodes at two ends of the interconnecting line is delta theta l ＝MB -1 P is as follows; the balance node is replaced to calculate the sensitivity of the power of the connecting line to the injection power of the corresponding node, and S is expanded to n l ×n b Dimension matrix, n l Number of tie lines for partition interconnection system, n b Interconnected for partitionsThe number of system nodes is that the power of the kth interconnecting line is P l (k)＝P l0 (k)+S (k) ΔP, where S (k) For the kth row, P of the sensitivity matrix S l0 For initial link power, node injection power increase Δp=Δp g +ΔP w -ΔP d Wherein DeltaP g 、ΔP w 、ΔP d The increment of node generator power, wind power and load power, delta P w P pair P l The influence of (2) depends on the sign of the corresponding element in the S matrix;
wind farm G w1 、G w2 The nodes are respectively m 1 ,m 2 ，In->Is G w1 Force minimum and maximum fluctuation amount, +.>Is G w2 Minimum and maximum fluctuation amounts of the output force;the kth row and mth row of the sensitivity matrix S respectively 1 、m 2 Column element, then->The sign of (2) is (+, +), and the wind farm output increment is +.>When the power of the connecting line k reaches the maximum, the corresponding scene is the worst scene T corresponding to the limit constraint on the transmission power of the connecting line k, when ∈>The symbols of (a) are (+, -), (-, +) and%-, -) the worst scenario T corresponding to the boundary constraint on the link k transmit power is +.>Is->For the lower bound of transmission power of tie-line k, < >>The signs of (++, +), (+, -), (-, +) and (-, -) are respectively +.>Is->
The maximum available standby calculation module is used for calculating the maximum available standby of each partition based on the worst scene of each partition;
the standby margin calculation module is used for calculating the standby margin of each partition by the maximum available standby of each partition;
and the clearing plan output module is used for judging whether the reserve is sufficient according to the reserve margin of each partition, outputting the clearing plan if the reserve is sufficient, and if the reserve is insufficient, increasing the local reserve of the partition with insufficient reserve and returning to calculate the maximum available reserve of the corresponding partition again until the reserve is sufficient.
10. The system for configuring regional backup of a wind power-containing system according to claim 9, wherein the data of the regional interconnected system obtained by the regional interconnected system data obtaining module comprises a system admittance matrix Y and loads P of each node d The power P of the generator is injected into each node g Wind power P of each node w Generating set standby quotation, generating set maximum standby capacity, system total standby demand, minimum standby capacity of each partition and inter-partition interconnecting lineReactance and power transfer limits.
11. The wind power system-containing system partition standby configuration system of claim 9, wherein there is n for the partition interconnect system z Each partition, Z r For the r-th partition, T r Representation and partition Z r And the maximum available reserve calculation module calculates the maximum available reserve of each partition under the worst scene according to the following expression:
s.t.R′ j ＝R j ,j∈Z r
wherein f (Z r ) For zone Z r Negative value of the sum of local spares and spares called from other partitions, R' i S is the capacity called in the standby plan (l,i) Increasing sensitivity to transmission power of the connecting line for the power of the node i; r is R i Capacity purchased for the optimally scheduled aggregate; r is R zr,min For zone Z r Local standby set point in; In order to tie the power transmission limit of the line, the fluctuation amounts of wind power under the worst scene T and the worst scene V corresponding to the connecting line l are respectively; ΔP j Is the absence of power inside the partition caused by the fault.
12. The system for configuring the reserve of a partition of a wind power system according to claim 11, wherein the reserve margin calculating module calculates the reserve margin of each partition by using a linear programming method, and the calculation expression is as follows:
zone Z is provided with r Is R zr,d Then define partition Z r Spare margin
13. The system for configuring regional backup for a wind power system of claim 12, wherein the out-plan output module determines whether the backup is sufficient in the following manner: if lambda is r ≥0，-f(Z r )≥R zr,d Indicating that the corresponding partition is fully spared.
14. The wind power system-containing partition standby configuration system according to claim 13, wherein the out-of-plan output module constructs a computational expression of a standby optimal configuration model as follows:
a ij (p(R i )-p(R j ))≤0，i，j∈Z r
a ij ≥0，j≠i
in the standby optimal configuration model, the total cost is the minimum, ρ r For zone Z r Reserve price of R i Spare capacity for purchase from generator i;R i upper and lower limits for spare capacity; r is R sys Taking the maximum value of the standby demands of each partition as the total standby demands of the system; p (R) i ) To generate electricitySpare price of machine i, a ij For loosening variables, each unit in the subarea takes the spare price of the corresponding area, and if the cost of the unit selected in the local area is higher than the marginal price of the whole system due to the minimum spare constraint of the area, the highest price of the unit selected in the local area is the price of the corresponding area; if the constructed standby optimal configuration model has an optimal solution, outputting a corrected standby clearing plan; if the constructed standby optimal configuration model has no solution, the local standby of the standby insufficient partition is increased, and the calculation is performed again.
15. The wind power system-containing system partition standby configuration system of claim 9, wherein the outbound plan output module verifies the outbound plan before outputting the outbound plan.
16. The wind power system-containing system partition standby configuration system of claim 15, wherein the step of verifying the outbound plan before the outbound plan output module outputs the outbound plan comprises: for the daily spot market, the transmission power constraint and the wind power uncertainty of the tie line are not considered in the clearing process, and a daily clearing plan is obtained; and (3) for the spot market in the day, evaluating the spare margin of each partition, comparing the corrected spare clearing plan with the spare clearing plan before correction for the partition with insufficient spare, outputting the corresponding clearing plan if the requirement of the constraint condition is met, otherwise, revising again.
17. A computer readable storage medium storing a computer program, wherein the computer program when executed by a processor implements the wind power system partition standby configuration method according to any one of claims 1 to 8.
18. A server comprising a memory, a processor and a computer program stored in the memory and executable on the processor, wherein the processor implements the wind power system partition standby configuration method according to any of claims 1 to 8 when the computer program is executed.
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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN111626641A (en) * 2020-06-17 2020-09-04 中国南方电网有限责任公司 Energy and standby combined market clearing method based on unit climbing characteristics

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