A method, device and system for cross-domain scheduling of electric power resources

Abstract

The present invention discloses a cross-domain scheduling method, device and system for electric power resources. The cross-domain scheduling device includes a constraint limiting unit, a modeling and solving unit and a synthetic scheduling unit. The cross-domain scheduling system includes a cross-domain scheduling module and a data storage module. In order to improve the cross-domain scheduling efficiency of electric power resources, the feasible domain of the tie line power of the wide-area time period combination and the feasible domain of the tie line power of the neighboring time period combination are modeled and solved to obtain the feasible domain of the wide-area time period and the feasible domain of the neighboring time period, and the feasible domain of the wide-area time period combination and the feasible domain of the neighboring time period are synthesized to obtain the feasible domain of the tie line exchange power of each time period in the area to be scheduled, and the scheduling is configured according to the feasible domain of the tie line exchange power. The cross-domain scheduling method, device and system improve the cross-domain scheduling efficiency of electric power resources.

Description

Technical Field

[0001] The present invention relates to the field of cross-domain scheduling of electric power resources, and to a method, device and system for cross-domain scheduling of electric power resources. Background Art

[0002] With the evolution of the new power system with a high proportion of new energy access and the construction of a unified national power market system, the trend of optimizing the allocation of power resources across provinces will gradually become prominent. In the practice of power grid operation management and power market construction in my country, the multi-level coordinated operation mode of "national dispatch-regional sub-center dispatch-provincial dispatch" is mainly followed, that is, the national power dispatch center and the regional power grid dispatch center first determine the transmission plan of the interconnection line between the regional power grid and the provincial power grid, and then the provincial dispatch agency uses this interconnection line plan as one of the boundary conditions, considering the power balance, section safety constraints, unit operation constraints, etc. in the province, and compiles the power generation dispatch plan in the province. Therefore, under the dispatch mode of "national, sub-level, and provincial multi-level coordination", the realization of surplus and shortage mutual assistance of inter-regional and inter-provincial interconnection lines is an important prerequisite for carrying out power balance and safe operation management of provincial power grids with provinces as entities. If the transmission capacity of the interconnection lines between sub-regions is not accurately estimated, two problems may arise: 1) The transmission space of the interconnection line is too conservative, which may make the potential of mutual assistance of electric energy resources between regions fail to be fully utilized. 2) If the transmission space of the tie line is not accurately calculated and exceeds the operating boundaries of some sub-regions, it will lead to no feasible solution for the preparation of the power generation dispatch plan of the provincial power grid based on the issued tie line plan scenario. The national dispatching and sub-center dispatching agencies need to revise the tie line plan again, and the provincial dispatching will prepare the power generation dispatch plan within the province based on the revised tie line plan. This will lead to repeated iterations of the tie line plan and the preparation of the provincial power generation plan, or directly reduce the inter-provincial power transmission and reception plan, thereby sacrificing the optimality of the dispatch plan to a certain extent and hindering the optimal allocation of inter-provincial and inter-regional power resources. From the above analysis, it can be seen that the preparation and verification of the tie line plan is a key link that affects the multi-level coordinated dispatching and transaction organization work. Therefore, it is necessary to reasonably evaluate the transmission capacity of the inter-provincial channel.

[0003] In the prior art, the most common method is to measure the transmission capacity of the interconnection line by means of available transfer capacity (ATC) or external power grid equivalence, so as to perform cross-regional scheduling and configuration according to the measurement results. In the ATC-based method, each provincial power grid is usually treated as a network node, and only the regional balance and the safety constraints of the interconnection line are considered to carry out scheduling. Since the planning of the interconnection line does not take into account the influence of the provincial network operation constraints, it may lead to the problem of the day-ahead scheduling plan in the province that is based on this. The method based on the external power grid equivalence mainly eliminates the external network and solves the transmission limit of the equivalent branch on the premise of ensuring that the total transmission capacity before and after the equivalence is equal. On this basis, in order to more carefully consider the influence of the operation constraints of the sub-region (inside the provincial power grid), some scholars have proposed to use multi-parameter planning theory, projection theory and other methods to calculate the feasible domain of the interconnection line, so as to better take into account the influence of the internal operation constraints of the sub-region.

[0004] However, the existing technology still has the following defects: when it is directly applied to a scenario with a large number of continuous scheduling periods, it will lead to a significant increase in the amount of calculation and may even be difficult to execute.

[0005] Therefore, there is a need for a cross-domain scheduling method, device and system for power resources to overcome the above-mentioned defects in the prior art. Summary of the invention

[0006] In view of the above-mentioned existing technical problems, the purpose of the present invention is to provide a method, device and system for cross-domain scheduling of power resources, so as to improve the efficiency of cross-domain scheduling of power resources.

[0007] The present invention provides a cross-domain scheduling method for electric power resources, the cross-domain scheduling method comprising: determining scheduling constraints, wide-area time period combination information and neighboring time period combination information according to a preset operation boundary information group of a cross-domain scheduling area; the cross-domain scheduling areas are connected by tie lines; according to the scheduling constraints, wide-area time period combination information, neighboring time period combination information, a preset wide-area time period feasible domain model and a preset neighboring time period feasible domain model, respectively modeling and solving the tie line power feasible domain of the wide-area time period combination and the tie line power feasible domain of the neighboring time period combination, thereby correspondingly obtaining the wide-area time period feasible domain and the neighboring time period feasible domain; synthesizing the wide-area time period combination feasible domain and the neighboring time period feasible domain, thereby obtaining the tie line exchange power feasible domain of each time period of the area to be scheduled, so that a user can perform cross-domain scheduling configuration of electric power resources according to the tie line exchange power feasible domain.

[0008] In one embodiment, according to the preset operation boundary information group of the area to be cross-domain dispatched, the dispatching constraints, wide-area time period combination information and neighboring time period combination information are determined, specifically including: obtaining the bus node load forecast data, power grid safety limit and operation characteristic parameters of the operating units from the preset operation boundary information group of the area to be cross-domain dispatched; according to the bus node load forecast data, power grid safety limit and operation characteristic parameters of the operating units, determining the dispatching constraints, wide-area time period combination information and neighboring time period combination information of each time period in the area to be cross-domain dispatched; the dispatching constraints include power grid safety constraints, power balance constraints, unit climbing constraints and unit operation constraints.

[0009] In one embodiment, according to the scheduling constraints, wide-area time period combination information, neighborhood time period combination information, a preset wide-area time period feasible domain model, and a preset neighborhood time period feasible domain model, the feasible domain of the interconnection line power of the wide-area time period combination and the feasible domain of the interconnection line power of the neighborhood time period combination are modeled and solved respectively, so as to obtain the wide-area time period feasible domain and the neighborhood time period feasible domain accordingly, specifically including: according to the scheduling constraints, the vertex search method, and the wide-area time period combination information, solving the preset wide-area time period feasible domain model, so as to obtain the wide-area time period feasible domain; according to the scheduling constraints, the vertex search method, and the neighborhood time period combination information, solving the preset neighborhood time period feasible domain model, so as to obtain the neighborhood time feasible domain.

[0010] In one embodiment, the wide-area time period combination feasible domain and the neighboring time period feasible domain are synthesized to obtain the feasible domain of the interconnection line exchange power of each time period in the area to be scheduled, specifically comprising: synthesizing the feasible domain of the interconnection line exchange power of each time period in the area to be scheduled according to the wide-area time period combination feasible domain, the neighboring time period feasible domain and the preset day-ahead scheduling time period relationship.

[0011] The present invention also provides a cross-domain scheduling device for electric power resources, the cross-domain scheduling device includes a constraint limitation unit, a modeling and solving unit and a synthetic scheduling unit, wherein the constraint limitation unit is used to determine the scheduling constraint conditions, the wide-area time period combination information and the neighborhood time period combination information according to the preset operation boundary information group of the area to be cross-domain scheduled; the areas to be cross-domain scheduled are connected by tie lines; the modeling and solving unit is used to model and solve the tie line power feasible domain of the wide-area time period combination and the tie line power feasible domain of the neighborhood time period combination according to the scheduling constraint conditions, the wide-area time period combination information, the neighborhood time period combination information, the preset wide-area time period feasible domain model and the preset neighborhood time period feasible domain model, respectively, so as to obtain the wide-area time period feasible domain and the neighborhood time period feasible domain correspondingly; the synthetic scheduling unit is used to synthesize the wide-area time period combination feasible domain and the neighborhood time period feasible domain, so as to obtain the tie line exchange power feasible domain of each time period of the area to be scheduled, so that the user can perform cross-domain scheduling configuration of electric power resources according to the tie line exchange power feasible domain.

[0012] In one embodiment, the constraint definition unit is also used to: obtain bus node load forecast data, power grid safety limits and operating characteristic parameters of the operating units from the preset operating boundary information group of the area to be cross-domain dispatched; determine the dispatch constraints, wide-area time period combination information and neighboring time period combination information of each time period in the area to be cross-domain dispatched according to the bus node load forecast data, power grid safety limits and operating characteristic parameters of the operating units; the dispatch constraints include power grid safety constraints, power balance constraints, unit climbing constraints and unit operation constraints.

[0013] In one embodiment, the modeling and solving unit is also used to: solve the preset wide-area time period feasible domain model according to the scheduling constraints, vertex search method and wide-area time period combination information, so as to obtain the wide-area time period feasible domain; solve the preset neighborhood time period feasible domain model according to the scheduling constraints, vertex search method and neighborhood time period combination information, so as to obtain the neighborhood time period feasible domain.

[0014] In one embodiment, the synthetic scheduling unit is further used to synthesize the feasible domain of the interconnection line exchange power of each time period in the area to be scheduled according to the feasible domain of the wide area time period combination, the feasible domain of the neighboring time period and the preset day-ahead scheduling time period relationship.

[0015] The present invention also provides a cross-domain scheduling system for electric power resources, the cross-domain scheduling system includes a cross-domain scheduling module and a data storage module, the cross-domain scheduling module is communicatively connected to the data storage module, the data storage module is used to store all data, and the cross-domain scheduling module is used to execute the cross-domain scheduling method of electric power resources as described above according to the data stored in the data storage module.

[0016] Compared with the prior art, the embodiments of the present invention have the following beneficial effects:

[0017] The present invention provides a cross-domain scheduling method, device and system for electric power resources, so as to improve the cross-domain scheduling efficiency of electric power resources. The feasible domain of the interconnection line power of a wide-area time period combination and the feasible domain of the interconnection line power of a neighboring time period combination are modeled and solved respectively to obtain the feasible domain of the wide-area time period combination and the feasible domain of the neighboring time period, and the feasible domain of the wide-area time period combination and the feasible domain of the neighboring time period are synthesized to obtain the feasible domain of the interconnection line exchange power of each time period in the area to be scheduled, and the scheduling is configured according to the feasible domain of the interconnection line exchange power. The cross-domain scheduling method, device and system improve the cross-domain scheduling efficiency of electric power resources. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] The present invention will be further described below in conjunction with the accompanying drawings, wherein:

[0019] Figure 1 A flowchart of an embodiment of a cross-domain scheduling method for electric power resources according to the present invention is shown;

[0020] Figure 2 A structural diagram showing an embodiment of a cross-domain scheduling device for electric power resources according to the present invention;

[0021] Figure 3 A structural diagram of an embodiment of a cross-domain scheduling system for electric power resources according to the present invention is shown. DETAILED DESCRIPTION

[0022] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention. Specific embodiment 1

[0024] The embodiment of the present invention firstly describes a cross-domain scheduling method for power resources. Figure 1 A flow chart of an embodiment of a method for cross-domain scheduling of electric power resources according to the present invention is shown.

[0025] like Figure 1 As shown, the method comprises the following steps:

[0026] S1: Determine scheduling constraints, wide-area time period combination information, and neighboring time period combination information based on the preset operation boundary information group of the area to be cross-domain scheduled.

[0027] In one embodiment, according to the preset operation boundary information group of the area to be cross-domain dispatched, the dispatch constraint conditions, wide-area time period combination information and neighboring time period combination information are determined, specifically including: obtaining bus node load forecast data, power grid safety limit and operation characteristic parameters of the operating units from the preset operation boundary information group of the area to be cross-domain dispatched; according to the bus node load forecast data, power grid safety limit and operation characteristic parameters of the operating units, the dispatch constraint conditions, wide-area time period combination information and neighboring time period combination information of each time period of the area to be cross-domain dispatched are determined. Among them, the dispatch constraint conditions include power grid safety constraint conditions, power balance constraint conditions, unit climbing constraint conditions and unit operation constraint conditions.

[0028] Specifically, the expression of the power balance constraint is:

[0029]

[0030] Where P G represents the unit output sequence matrix of each period of the day-ahead plan, and the element in the i-th row and t-th column represents the output of unit i in period t; P TL represents the sequence matrix of the power received by the tie line nodes in the sub-area, and the element in the lth row and tth column represents the power received by the tie line l in the tth period; P D N represents the node load sequence matrix of the sub-region, and the element in the dth row and tth column represents the load demand of bus node d in period t; G Indicates the number of units within the sub-area, N TL and N D Respectively represent the number of tie line nodes and busbar nodes in the sub-area; and Respectively represent and P G , P TL and P D A column vector with corresponding dimensions and all elements are 1.

[0031] Specifically, the expression of the unit operation constraint condition is:

[0032]

[0033] Where P Gmin and P GmaxThe column vectors representing the minimum and maximum output ranges of the units in the sub-region respectively; e H Indicates that the dimension is N H A column vector whose elements are all 1.

[0034] Specifically, the expression of the unit climbing constraint condition is:

[0035]

[0036] In the formula, and They represent the column vectors composed of the up-slope and down-slope capabilities of the units in the sub-area respectively; e t Indicates that the dimension is N H and the unit column vector whose tth element is 1; correspondingly, the unit column vector e t-1 and e t+1 The dimension is N H , taking 1 at the t-1th and t+1th elements respectively.

[0037] Specifically, the expression of the power grid security constraint is:

[0038]

[0039] Where G represents the power flow transfer distribution factor (PTDF) matrix of the sub-region, G g and G TL They represent the PTDF matrices corresponding to the columns where the power generation nodes are located and the columns where the tie line nodes are located; and Column vector of the forward and reverse limits of the safety constraints, respectively.

[0040] S2: Based on the scheduling constraints, the wide-area time period combination information, the neighborhood time period combination information, the preset wide-area time period feasible domain model and the preset neighborhood time period feasible domain model, the feasible domain of the interconnection line power of the wide-area time period combination and the feasible domain of the interconnection line power of the neighborhood time period combination are modeled and solved respectively, so as to obtain the feasible domain of the wide-area time period and the feasible domain of the neighborhood time period accordingly.

[0041] In one embodiment, according to the scheduling constraints, wide-area time period combination information, neighborhood time period combination information, a preset wide-area time period feasible domain model, and a preset neighborhood time period feasible domain model, the feasible domain of the interconnection line power of the wide-area time period combination and the feasible domain of the interconnection line power of the neighborhood time period combination are modeled and solved respectively, so as to obtain the wide-area time period feasible domain and the neighborhood time period feasible domain accordingly, specifically including: according to the scheduling constraints, the vertex search method, and the wide-area time period combination information, solving the preset wide-area time period feasible domain model, so as to obtain the wide-area time period feasible domain; according to the scheduling constraints, the vertex search method, and the neighborhood time period combination information, solving the preset neighborhood time period feasible domain model, so as to obtain the neighborhood time feasible domain.

[0042] Specifically, the preset wide area period feasible domain model is:

[0043]

[0044] The wide-area time period feasible domain model is constrained by the following tie-line power feasible domains of each wide-area time period α:

[0045]

[0046] in, is a column vector consisting of the active output of all generators in the wide area period α, is the column vector composed of the active power sent by all tie-line nodes in the wide-area period α, It is determined according to the feasible region constraint of the tie line power (Formula (1)) about P G,α and P TL,α The feasible domain of the scheduling plan is:

[0047]

[0048] Specifically, the preset feasible domain model for the neighborhood period is:

[0049]

[0050] The feasible domain model of the neighborhood period is constrained by the feasible domain of the tie line power in each neighborhood period set as follows:

[0051]

[0052] In the formula, and They respectively represent the tie line injection power column vector, unit output column vector and bus load column vector corresponding to time period t in each neighborhood time period combination.

[0053] In the formula, the scheduling period t should belong to the set of the τth neighboring period, that is, (τ-1)NHN +1≤t≤min(τN HN , N H ); is the column vector consisting of the active output of all generator sets in time period t, is the column vector consisting of the active power delivered by all tie-line nodes in time period t, It is determined according to the feasible domain constraints of the tie line power in each neighborhood time period set (Formula (2)). and The feasible domain of the scheduling plan is:

[0054]

[0055] Finally, based on the vertex search method of convex polyhedron, the feasible domain model of all scheduling periods t contained in each neighborhood period set in the neighborhood period feasible domain model is obtained, and the solution of the feasible domain of the tie line in each neighborhood period is obtained.

[0056] S3: synthesize the wide-area time period combination feasible domain and the neighborhood time period feasible domain to obtain the tie line exchange power feasible domain of each time period in the area to be scheduled, so that the user can perform cross-domain scheduling configuration of power resources according to the tie line exchange power feasible domain.

[0057] In one embodiment, the wide-area time period combination feasible domain and the neighboring time period feasible domain are synthesized to obtain the feasible domain of the interconnection line exchange power of each time period in the area to be scheduled, specifically comprising: synthesizing the feasible domain of the interconnection line exchange power of each time period in the area to be scheduled according to the wide-area time period combination feasible domain, the neighboring time period feasible domain and the preset day-ahead scheduling time period relationship.

[0058] The calculation results of the wide-area and neighborhood combinations take into account the influence of the coupling constraints across time periods and adjacent time periods on the feasible domain of the interconnection line. Therefore, they can be synthesized based on the feasible domain of the wide-area time period combination and the feasible domain of the neighborhood time period to obtain the feasible domain of the interconnection line exchange power for each time period of the day-ahead scheduling.

[0059] The calculation of the wide-area feasible domain sub-model will output the feasible domain corresponding to each wide-area time period α This result will affect the feasible domain of the day-ahead scheduling period t covered by the αth wide-area period.

[0060] The calculation results of the neighboring time periods take into account the coupling factors of the adjacent time periods of the day-ahead scheduling. According to the coverage relationship between the τth neighboring time period combination and the day-ahead scheduling time period t, Among them, the one that has a direct impact on the feasible domain of the day-ahead scheduling period t is

[0061] Finally, the feasible domain obtained by wide area and neighborhood calculation The feasible domain of the t-th scheduling period before the day is expressed as:

[0062]

[0063]

[0064] Where, T α represents the set of day-ahead scheduling periods covered by the αth wide-area period; T τ Represents the set of day-ahead scheduling periods covered by the τth neighborhood period combination.

[0065] The embodiment of the present invention describes a cross-domain scheduling method for electric power resources, thereby improving the cross-domain scheduling efficiency of electric power resources. The feasible domain of the interconnection line power of a wide-area time period combination and the feasible domain of the interconnection line power of a neighboring time period combination are modeled and solved respectively to obtain the feasible domain of the wide-area time period combination and the feasible domain of the neighboring time period, and the feasible domain of the wide-area time period combination and the feasible domain of the neighboring time period are synthesized to obtain the feasible domain of the interconnection line exchange power of each time period in the area to be scheduled, and scheduling is performed according to the feasible domain of the interconnection line exchange power. The cross-domain scheduling method improves the cross-domain scheduling efficiency of electric power resources. Specific embodiment 2

[0067] In addition to the above method, the embodiment of the present invention also describes a cross-domain scheduling device for power resources. Figure 2 A structural diagram of an embodiment of a cross-domain scheduling device for electric power resources according to the present invention is shown.

[0068] like Figure 2 As shown, the cross-domain scheduling device includes a constraint definition unit 11, a modeling and solving unit 12, and a synthesis scheduling unit 13.

[0069] The constraint definition unit 11 is used to determine the scheduling constraint conditions, wide area time period combination information and neighboring area time period combination information according to the preset operation boundary information group of the area to be cross-domain scheduled; the areas to be cross-domain scheduled are connected by a contact line.

[0070] In one embodiment, the constraint definition unit 11 is also used to: obtain bus node load forecast data, power grid safety limits and operating characteristic parameters of the operating units from the preset operating boundary information group of the area to be cross-domain dispatched; determine the dispatch constraints of each time period in the area to be cross-domain dispatched, wide-area time period combination information and neighboring time period combination information according to the bus node load forecast data, power grid safety limits and operating characteristic parameters of the operating units; the dispatch constraints include power grid safety constraints, power balance constraints, unit climbing constraints and unit operation constraints.

[0071] The modeling and solving unit 12 is used to model and solve the feasible domain of the interconnection line power of the wide area period combination and the feasible domain of the interconnection line power of the neighborhood period combination according to the scheduling constraints, the wide area period combination information, the neighborhood period combination information, the preset wide area period feasible domain model and the preset neighborhood period feasible domain model, so as to obtain the feasible domain of the wide area period and the feasible domain of the neighborhood period accordingly.

[0072] In one embodiment, the modeling and solving unit 12 is also used to: solve the preset wide-area time period feasible domain model according to the scheduling constraints, vertex search method and wide-area time period combination information, so as to obtain the wide-area time period feasible domain; solve the preset neighborhood time period feasible domain model according to the scheduling constraints, vertex search method and neighborhood time period combination information, so as to obtain the neighborhood time period feasible domain.

[0073] The synthetic scheduling unit 13 is used to synthesize the wide-area time period combined feasible domain and the neighborhood time period feasible domain, so as to obtain the tie line exchange power feasible domain of each time period in the area to be scheduled, so that the user can perform cross-domain scheduling configuration of power resources according to the tie line exchange power feasible domain.

[0074] In one embodiment, the synthetic scheduling unit 13 is further used to synthesize the feasible domain of the interconnection line exchange power of each time period in the area to be scheduled according to the feasible domain of the wide area time period combination, the feasible domain of the neighboring time period and the preset day-ahead scheduling time period relationship.

[0075] The embodiment of the present invention describes a cross-domain scheduling device for electric power resources, thereby improving the cross-domain scheduling efficiency of electric power resources. The feasible domain of the interconnection line power of a wide-area time period combination and the feasible domain of the interconnection line power of a neighboring time period combination are modeled and solved respectively to obtain the wide-area time period feasible domain and the neighboring time period feasible domain, the wide-area time period combination feasible domain and the neighboring time period feasible domain are synthesized to obtain the interconnection line exchange power feasible domain of each time period in the area to be scheduled, and scheduling is performed according to the interconnection line exchange power feasible domain. The cross-domain scheduling device improves the cross-domain scheduling efficiency of electric power resources. Specific embodiment three

[0077] In addition to the above method and apparatus, the present invention also describes a cross-domain scheduling system for power resources. Figure 3 A structural diagram of an embodiment of a cross-domain scheduling system for electric power resources according to the present invention is shown.

[0078] like Figure 3 As shown, the cross-domain scheduling system includes a cross-domain scheduling module 1 and a data storage module 2. The cross-domain scheduling module 1 is communicatively connected to the data storage module 2. The data storage module 2 is used to store all data. The cross-domain scheduling module 1 is used to execute the cross-domain scheduling method of power resources as described above according to the data stored in the data storage module 2.

[0079] The embodiment of the present invention describes a cross-domain scheduling system for electric power resources, thereby improving the cross-domain scheduling efficiency of electric power resources. The feasible domain of the interconnection line power of a wide-area time period combination and the feasible domain of the interconnection line power of a neighboring time period combination are modeled and solved respectively to obtain the feasible domain of the wide-area time period combination and the feasible domain of the neighboring time period, and the feasible domain of the wide-area time period combination and the feasible domain of the neighboring time period are synthesized to obtain the feasible domain of the interconnection line exchange power of each time period in the area to be scheduled, and scheduling is performed according to the feasible domain of the interconnection line exchange power. The cross-domain scheduling system improves the cross-domain scheduling efficiency of electric power resources.

[0080] The specific embodiments described above further illustrate the purpose, technical solutions and beneficial effects of the present invention. It should be understood that the above description is only a specific embodiment of the present invention and is not intended to limit the scope of protection of the present invention. It is particularly pointed out that for those skilled in the art, any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention should be included in the scope of protection of the present invention.

Claims

1. A cross-domain scheduling method for power resources, characterized in that: The cross-domain scheduling method includes: Determine scheduling constraints, wide area time period combination information, and neighboring area time period combination information according to a preset operation boundary information group of the area to be cross-domain scheduled; the areas to be cross-domain scheduled are connected by a contact line; According to the scheduling constraints, the wide area period combination information, the neighborhood period combination information, the preset wide area period feasible domain model and the preset neighborhood period feasible domain model, respectively model and solve the feasible domain of the tie line power of the wide area period combination and the feasible domain of the tie line power of the neighborhood period combination, so as to obtain the feasible domain of the wide area period and the feasible domain of the neighborhood period accordingly; The wide area time period combination feasible domain and the neighborhood time period feasible domain are synthesized to obtain the tie line exchange power feasible domain of each time period in the area to be scheduled, so that the user can perform cross-domain scheduling configuration of power resources according to the tie line exchange power feasible domain; The dispatching constraints include power grid security constraints, power balance constraints, unit ramp constraints and unit operation constraints; Among them, the expression of power balance constraint is: Where P G represents the unit output sequence matrix of each period of the day-ahead plan, and the element in the i-th row and t-th column represents the output of unit i in period t; P TL represents the sequence matrix of the power received by the tie line nodes in the sub-area, and the element in the lth row and tth column represents the power received by the tie line l in the tth period; P D N represents the node load sequence matrix of the sub-region, and the element in the dth row and tth column represents the load demand of bus node d in period t; G Indicates the number of units within the sub-area, N TL and N D Respectively represent the number of tie line nodes and busbar nodes in the sub-area; and Respectively represent and P G , P TL and P D A column vector with corresponding dimensions and elements equal to 1; The expression of the unit operation constraint condition is: Where P Gmin and P Gmax The column vectors representing the minimum and maximum output ranges of the units in the sub-region respectively; e H Indicates that the dimension is N H A column vector whose elements are all 1; The expression of the unit climbing constraint condition is: In the formula, and They represent the column vectors composed of the up-slope and down-slope capabilities of the units in the sub-area respectively; e t Indicates that the dimension is N H The unit column vector whose tth element is 1; the unit column vector e t-1 and e t+1 The dimension is N H ; The expression of power grid security constraint condition is: Where G represents the power flow transfer distribution factor matrix of the sub-region, G g and G TL Respectively represent the power flow transfer distribution factor matrix corresponding to the column where the power generation node is located and the column where the tie line node is located; and Represents the column vectors of the forward and reverse limits of the safety constraints; The preset wide area period feasible domain model is: The wide-area time period feasible domain model is constrained by the following tie-line power feasible domains of each wide-area time period α: Among them, 1≤α≤N HW ; in, is a column vector consisting of the active output of all generators in the wide area period α, is the column vector composed of the active power sent by all tie-line nodes in the wide-area period α, It is determined based on the feasible region constraints of the tie line power. G,α and P TL,α The feasible domain of the scheduling plan; The preset feasible domain model of the neighborhood period is: The feasible domain model of the neighborhood period is constrained by the feasible domain of the tie line power in each neighborhood period set as follows: where (τ - 1)N HN + 1 ≤ t ≤ min(τN HN , N H ); (τ-1)N HN +1≤t≤min(τN HN ,N H ); In the formula, and They represent the tie line injection power column vector, unit output column vector and bus load column vector corresponding to time period t in each neighborhood time period combination respectively; is the column vector consisting of the active output of all generator sets in time period t, is the column vector consisting of the active power delivered by all tie-line nodes in time period t, It is based on the feasible domain constraints of the tie line power within each neighborhood time period set; The feasible domain of the tie line power of the wide-area time period combination and the feasible domain of the tie line power of the neighborhood time period combination are modeled and solved, so as to obtain the feasible domain of the wide-area time period and the feasible domain of the neighborhood time period, specifically: Based on the vertex search method of convex polyhedron, the feasible domain model of all scheduling periods t contained in each neighborhood period set in the neighborhood period feasible domain model is obtained, and the feasible domain solution of the tie line in each neighborhood period is obtained.

2. The cross-domain scheduling method of electric power resources according to claim 1, characterized in that: According to the preset operation boundary information group of the area to be cross-domain scheduled, the scheduling constraint conditions, the wide area time period combination information and the neighboring area time period combination information are determined, specifically including: Obtain bus node load forecast data, power grid safety limits, and operating characteristic parameters of operating units from the preset operating boundary information group of the area to be cross-domain dispatched; According to the bus node load forecast data, power grid safety limits and operating characteristic parameters of the operating units, the dispatch constraint conditions for each time period in the area to be cross-domain dispatched, the wide-area time period combination information and the neighboring time period combination information are determined.

3. The cross-domain scheduling method of electric power resources according to claim 2 is characterized in that: According to the scheduling constraints, the wide area period combination information, the neighborhood period combination information, the preset wide area period feasible domain model and the preset neighborhood period feasible domain model, the feasible domain of the tie line power of the wide area period combination and the feasible domain of the tie line power of the neighborhood period combination are modeled and solved respectively, so as to obtain the feasible domain of the wide area period and the feasible domain of the neighborhood period, which specifically includes: Solving a preset wide-area period feasible domain model according to the scheduling constraint conditions, the vertex search method and the wide-area period combination information, thereby obtaining a wide-area period feasible domain; According to the scheduling constraints, the vertex search method and the neighborhood period combination information, a preset neighborhood period feasible domain model is solved to obtain the neighborhood period feasible domain.

4. The cross-domain scheduling method of electric power resources according to claim 3 is characterized in that: The wide area time period combination feasible region and the neighborhood time period feasible region are synthesized to obtain the tie line exchange power feasible region of each time period in the area to be scheduled, specifically including: According to the wide area time period combination feasible region, the neighborhood time period feasible region and the preset day-ahead scheduling time period relationship, the interconnection line exchange power feasible region of each time period in the area to be scheduled is synthesized.

5. A cross-domain scheduling device for electric power resources, characterized in that: The cross-domain scheduling device includes a constraint definition unit, a modeling solution unit and a synthesis scheduling unit, wherein: The constraint definition unit is used to determine the scheduling constraint conditions, wide area time period combination information and neighboring time period combination information according to the preset operation boundary information group of the cross-domain scheduling area; the cross-domain scheduling areas are connected by a contact line; The modeling and solving unit is used to model and solve the feasible domain of the tie line power of the wide area period combination and the feasible domain of the tie line power of the neighborhood period combination according to the scheduling constraint conditions, the wide area period combination information, the neighborhood period combination information, the preset wide area period feasible domain model and the preset neighborhood period feasible domain model, so as to obtain the feasible domain of the wide area period and the feasible domain of the neighborhood period respectively; The synthetic scheduling unit is used to synthesize the wide-area time period combined feasible domain and the neighboring time period feasible domain, so as to obtain the tie line exchange power feasible domain of each time period in the area to be scheduled, so that the user can perform cross-domain scheduling configuration of power resources according to the tie line exchange power feasible domain; The dispatching constraints include power grid security constraints, power balance constraints, unit ramp constraints and unit operation constraints; Among them, the expression of power balance constraint is: Where P G represents the unit output sequence matrix of each period of the day-ahead plan, and the element in the i-th row and t-th column represents the output of unit i in period t; P TL represents the sequence matrix of the power received by the tie line nodes in the sub-area, and the element in the lth row and tth column represents the power received by the tie line l in the tth period; P D N represents the node load sequence matrix of the sub-region, and the element in the dth row and tth column represents the load demand of bus node d in period t; G Indicates the number of units within the sub-area, N TL and N D Respectively represent the number of tie line nodes and busbar nodes in the sub-area; and Respectively represent and P G , P TL and P D A column vector with corresponding dimensions and elements equal to 1; The expression of the unit operation constraint condition is: Where P Gmin and P Gmax The column vectors representing the minimum and maximum output ranges of the units in the sub-region respectively; e H Indicates that the dimension is N H A column vector whose elements are all 1; The expression of the unit climbing constraint condition is: In the formula, and They represent the column vectors composed of the up-slope and down-slope capabilities of the units in the sub-area respectively; e t Indicates that the dimension is N H The unit column vector whose tth element is 1; the unit column vector e t-1 and e t+1 The dimension is N H ; The expression of power grid security constraint condition is: Where G represents the power flow transfer distribution factor matrix of the sub-region, G g and G TL Respectively represent the power flow transfer distribution factor matrix corresponding to the column where the power generation node is located and the column where the tie line node is located; and Represents the column vectors of the forward and reverse limits of the safety constraints; The preset wide area period feasible domain model is: The wide-area time period feasible domain model is constrained by the following tie-line power feasible domains of each wide-area time period α: Among them, 1≤α≤N HW ; in, is a column vector consisting of the active output of all generators in the wide area period α, is the column vector composed of the active power sent by all tie-line nodes in the wide-area period α, It is determined based on the feasible region constraints of the tie line power. G,α and P TL,α The feasible domain of the scheduling plan; The preset feasible domain model of the neighborhood period is: The feasible domain model of the neighborhood period is constrained by the feasible domain of the tie line power in each neighborhood period set as follows: where (τ - 1)N HN + 1 ≤ t ≤ min(τN HN , N H ); (τ-1)N HN +1≤t≤min(τN HN ,N H ); In the formula, and They represent the tie line injection power column vector, unit output column vector and bus load column vector corresponding to time period t in each neighborhood time period combination respectively; is the column vector consisting of the active output of all generator sets in time period t, is the column vector consisting of the active power delivered by all tie-line nodes in time period t, It is based on the feasible domain constraints of the tie line power within each neighborhood time period set; The feasible domain of the tie line power of the wide-area time period combination and the feasible domain of the tie line power of the neighborhood time period combination are modeled and solved, so as to obtain the feasible domain of the wide-area time period and the feasible domain of the neighborhood time period, specifically: Based on the vertex search method of convex polyhedron, the feasible domain model of all scheduling periods t contained in each neighborhood period set in the neighborhood period feasible domain model is obtained, and the feasible domain solution of the tie line in each neighborhood period is obtained.

6. The cross-domain scheduling device for electric power resources according to claim 5, characterized in that: The constraint definition unit is also used for: Obtain bus node load forecast data, power grid safety limits, and operating characteristic parameters of operating units from the preset operating boundary information group of the area to be cross-domain dispatched; According to the bus node load forecast data, power grid safety limits and operating characteristic parameters of the operating units, the dispatch constraint conditions for each time period in the area to be cross-domain dispatched, the wide-area time period combination information and the neighboring time period combination information are determined.

7. The cross-domain scheduling device for electric power resources according to claim 6, characterized in that: The modeling and solving unit is also used for: Solving a preset wide-area period feasible domain model according to the scheduling constraint conditions, the vertex search method and the wide-area period combination information, thereby obtaining a wide-area period feasible domain; According to the scheduling constraints, the vertex search method and the neighborhood period combination information, a preset neighborhood period feasible domain model is solved to obtain the neighborhood period feasible domain.

8. The cross-domain scheduling device for electric power resources according to claim 7, characterized in that: The synthesis scheduling unit is also used for: According to the wide area time period combination feasible region, the neighborhood time period feasible region and the preset day-ahead scheduling time period relationship, the interconnection line exchange power feasible region of each time period in the area to be scheduled is synthesized.

9. A cross-domain dispatching system for electric power resources, characterized in that: The cross-domain scheduling system includes a cross-domain scheduling module and a data storage module. The cross-domain scheduling module is communicatively connected to the data storage module. The data storage module is used to store all data. The cross-domain scheduling module is used to execute the cross-domain scheduling method of electric power resources as described in any one of claims 1 to 4 according to the data stored in the data storage module.

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