Method and system for determining strategy meeting effective standby mutual aid reservation of regional interconnected power grid

Abstract

The invention discloses a strategy determination method and system for satisfying effective reserve mutual aid reservation of a regional interconnected power grid, and the method comprises the steps: determining the reserve vacancy amount in a region based on the reserve constraint condition in the region with the maximum new energy consumption as the target according to the reserve reservation demand in the region; according to the spare vacancy amount in the region, taking the minimum cross-region spare support vacancy as a target, and based on cross-region spare mutual aid constraint conditions, determining a unit start-stop strategy of the mutual aid region; the cross-regional standby mutual aid constraint condition comprises a cross-regional cross-section power flow constraint, and the cross-regional cross-section power flow constraint comprises that after standby mutual aid, the regional cross-section power flow of the region does not exceed the limit and the regional cross-section power flow of the mutual aid region does not exceed the limit. Channel surplus spaces among the regions are considered, and the surplus and deficiency mutual aid capability of the interconnected power grid is improved by adjusting the starting and stopping conditions of a unit; meanwhile, the condition that the standby supply side and the demand side are jointly influenced by key section power flow is considered, it is guaranteed that the standby is all available in the calling process, and standby effectiveness is improved.

Description

Technical Field

[0001] The present invention relates to the field of power grid control, and in particular to a strategy determination method and system for satisfying effective standby mutual aid reservation of regional interconnected power grids. Background Art

[0002] For the regional power grid, which is the smallest unit for achieving power and electricity balance, with the rapid access of high-proportion wind turbines, photovoltaic and other new energy units, the balance margin within the regional power grid system is getting smaller and smaller, and even negative. The new power system faces the risk of frequent imbalances in supply and demand and large imbalance differences. The flexibility resources of the smallest unit of the regional power grid are insufficient to support the balance needs of "ensuring supply" and "promoting consumption". Therefore, it is necessary to utilize the interconnection and mutual assistance capabilities between regions and promote the deep sharing of spare capacity within the regional interconnected power grid, which can effectively alleviate the pressure of "ensuring supply" and "promoting consumption".

[0003] At present, reserve mutual assistance is mainly achieved through the regional ancillary service trading market. Although it can achieve inter-regional mutual assistance to a certain extent, there are still the following limitations: First, regional ancillary service trading is based on the premise of surplus space in the inter-regional channel, but the inter-regional mutual assistance capacity is also closely related to the startup method. In the absence of a coordinated decision on the startup method of the regional power grid, the inter-regional reserve mutual assistance reservation cannot fully utilize the surplus and shortage mutual assistance capacity of the interconnected power grid; in addition, the reserve calling process is that when the load forecast deviation of a certain node or various actual operation accidents lead to an imbalance in the supply and demand of power generation and use, resulting in reserve demand, the reserved reserves of other node units are called and transmitted to the node through the section. Therefore, the reserve reservation method is not only related to the maximum reserve capacity of the unit, but also affected by the redundancy of the power transmission section of the power grid. In the prior art, a Chinese patent application with application number 202010381748.6 discloses a method for unit zoning identification and effective reserve allocation based on critical sections. This method takes into account the critical section margin factor in the effective reserve allocation method, but only takes into account the impact of the critical section limit constraint on the reserve supply side, resulting in the reserve capacity not being fully and effectively called. Summary of the invention

[0004] Purpose of the invention: In view of the above shortcomings, the present invention provides a method and system for determining a strategy to enhance mutual assistance capabilities and meet the requirements of effective standby mutual assistance reservation for regional interconnected power grids.

[0005] Technical solution: To solve the above problems, the present invention adopts a strategy determination method for satisfying the effective reserve mutual assistance reservation of regional interconnected power grids, comprising the following steps:

[0006] According to the reserve reserve demand in the region, with the goal of maximizing the consumption of new energy, the reserve shortage in the region is determined based on the reserve constraints in the region;

[0007] According to the reserve shortage in the region, with the goal of minimizing the cross-regional reserve support shortage, the unit start-up and shutdown strategy of the mutual assistance region that meets the reserve reservation demand in the region is determined based on the cross-regional reserve mutual assistance constraint conditions;

[0008] The cross-regional reserve mutual aid constraint condition includes a cross-regional section flow constraint, and the cross-regional section flow constraint includes: after the reserve mutual aid, the regional section flow of the region does not exceed the limit and the regional section flow of the mutual aid region does not exceed the limit.

[0009] Furthermore, the reserve requirement in the region includes the positive reserve requirement and negative reserve requirement

[0010] The reserve requirement in the region meets the load forecast deviation in the region:

[0011]

[0012] Among them, K A,nd Indicates whether the node nd belongs to region A, K A,nd =1 means node nd belongs to region A, K A,nd =0 means that node nd does not belong to area A; e nd,t It represents the load forecast deviation of node nd at time t. The load forecast deviation range of node nd at time t is

[0013] Furthermore, the objective function for maximizing the consumption of new energy is:

[0014]

[0015] Where T represents the total number of time periods considered; M R represents the reserve shortage penalty factor; Indicates that area A is in reserve. Indicates the negative reserve shortage in area A; E indicates the set of new energy units; N indicates the number of units; represents the upper limit of unit i at time t; p i,t Represents the output of unit i at time t.

[0016] Furthermore, the intra-region backup constraint conditions include:

[0017] Power balance constraints:

[0018] The total system load is equal to the total power generation of the units plus the tie line plan:

[0019]

[0020] Where NT represents the number of tie lines; P tie,trepresents the inter-regional tie line plan, which is a fixed curve; I represents the number of bus loads, d l,t represents the predicted value of bus load l;

[0021] Alternative constraints:

[0022] The intra-regional spares meet the spare reservation requirements of the total used region:

[0023]

[0024] The positive and standby reserves of the units meet the unit output range constraints:

[0025]

[0026] The negative standby reserve of the unit needs to meet the unit output range constraints:

[0027]

[0028] Among them, K A,i Indicates whether unit i belongs to area A, K A,i =1 means unit i belongs to area A, K A,i =0 means unit i does not belong to area A; represents the positive reserve capacity of unit i at time t, represents the negative reserve capacity of unit i at time t; u i,t represents the startup mode of unit i at time t, u i,t =1 means the unit is on, u i,t =0 means the unit is shut down; It indicates the output of unit i after being called into standby mode in the area at time t. It represents the output of unit i after negative reserve call in the area at time t; represents the lower limit of the output of unit i at time t, Represents the lower limit of the output of unit i at time t.

[0029] Furthermore, the objective function for minimizing the shortage of cross-regional standby support is:

[0030]

[0031] Among them, NJ represents the number of mutual aid areas, It represents the mutual aid positive reserve shortfall provided by region J to region A. It represents the mutual aid negative reserve deficit provided by region J to region A.

[0032] Furthermore, the cross-regional reserve mutual aid constraint conditions include:

[0033] Constraints on the reserved capacity for mutual assistance in each region:

[0034]

[0035] Among them, K J,i Indicates whether unit i belongs to area J, K J,i =1 means unit i belongs to region J,

[0036] K J,i =0 means unit i does not belong to area J; represents the mutual positive reserve capacity of unit i at time t, represents the mutual negative reserve capacity of unit i at time t; It indicates the proportion of mutual aid reserve provided by region J to region A;

[0037] The inter-regional positive and negative standby support capacity is reserved to meet the unit output range constraints:

[0038]

[0039] in, It indicates the output of unit i after mutual assistance, positive and standby call at time t, It represents the output of unit i after mutual assistance negative reserve call at time t;

[0040] Sub-regional balance constraints:

[0041] Region A accepts the balance constraint of other regions' mutual aid and reserve:

[0042]

[0043] The balance constraint for the mutual reserve provided by region j to region A is:

[0044]

[0045] Cross-regional section flow constraints:

[0046] After the positive and standby power supply is mutually beneficial, the power flow in section A of area does not exceed the limit:

[0047]

[0048] After the positive and reserve forces are mutually beneficial, the flow at section j in area does not exceed the limit:

[0049]

[0050] After the negative reserve mutual assistance, the power flow in section A of area does not exceed the limit:

[0051]

[0052] After the negative reserve mutual assistance, the flow of section j in area does not exceed the limit:

[0053]

[0054] Among them, f s min 、f s max It indicates the upper and lower limits of the flow of section s; G indicates the sensitivity of the equipment to the section.

[0055] The present invention also provides a strategy determination system for satisfying effective reserve mutual assistance reservation of regional power grids, comprising:

[0056] A module for confirming the reserve shortage in a region is used to determine the reserve shortage in a region based on the reserve reservation demand in the region and the maximum consumption of new energy, based on the reserve constraint conditions in the region;

[0057] A mutual aid strategy determination module is used to determine the unit start-up and shutdown strategy of the mutual aid area that meets the reserve reservation demand in the area based on the reserve shortage in the area and the minimum cross-regional reserve support shortage as the goal, based on the cross-regional reserve mutual aid constraint conditions;

[0058] The cross-regional reserve mutual aid constraint condition includes a cross-regional section flow constraint, and the cross-regional section flow constraint includes: after the reserve mutual aid, the regional section flow of the region does not exceed the limit and the regional section flow of the mutual aid region does not exceed the limit.

[0059] Furthermore, the reserve requirement in the region includes the positive reserve requirement and negative reserve requirement The reserve requirement in the region meets the load forecast deviation in the region:

[0060]

[0061] Among them, K A,nd Indicates whether the node nd belongs to region A, K A,nd =1 means node nd belongs to region A, K A,nd =0 means that node nd does not belong to area A; e nd,t It represents the load forecast deviation of node nd at time t. The load forecast deviation range of node nd at time t is

[0062] Furthermore, the objective function for maximizing the consumption of new energy is:

[0063]

[0064] Where T represents the total number of time periods considered; M R represents the reserve shortage penalty factor; Indicates that area A is in reserve. Indicates the negative reserve shortage in area A; E indicates the set of new energy units; N indicates the number of units; represents the upper limit of unit i at time t; p i,t Represents the output of unit i at time t.

[0065] Furthermore, the intra-region backup constraint conditions include:

[0066] Power balance constraints:

[0067] The total system load is equal to the total power generation of the units plus the tie line plan:

[0068]

[0069] Where NT represents the number of tie lines; P tie,t represents the inter-regional tie line plan, which is a fixed curve; I represents the number of bus loads, d l,t represents the predicted value of bus load l;

[0070] Alternative constraints:

[0071] The intra-regional spares meet the spare reservation requirements of the total used region:

[0072]

[0073] The positive and standby reserves of the units meet the unit output range constraints:

[0074]

[0075] The negative standby reserve of the unit needs to meet the unit output range constraints:

[0076]

[0077] Among them, K A,i Indicates whether unit i belongs to area A, K A,i =1 means unit i belongs to area A, K A,i =0 means unit i does not belong to area A; represents the positive reserve capacity of unit i at time t, represents the negative reserve capacity of unit i at time t; u i,t represents the startup mode of unit i at time t, u i,t =1 means the unit is on, u i,t =0 means the unit is shut down; It indicates the output of unit i after being called into standby mode in the area at time t. It represents the output of unit i after negative reserve call in the area at time t; represents the lower limit of the output of unit i at time t, Represents the lower limit of the output of unit i at time t.

[0078] Furthermore, the objective function for minimizing the shortage of cross-regional standby support is:

[0079]

[0080] Among them, NJ represents the number of mutual aid areas, It represents the mutual aid positive reserve shortfall provided by region J to region A. It represents the mutual aid negative reserve deficit provided by region J to region A.

[0081] Furthermore, the cross-regional reserve mutual aid constraint conditions include:

[0082] Constraints on the reserved capacity for mutual assistance in each region:

[0083]

[0084] Among them, K J,i Indicates whether unit i belongs to area J, K J,i =1 means unit i belongs to area J, K J,i =0 means unit i does not belong to area J; represents the mutual positive reserve capacity of unit i at time t, represents the mutual negative reserve capacity of unit i at time t; It indicates the proportion of mutual aid reserve provided by region J to region A;

[0085] The inter-regional positive and negative standby support capacity is reserved to meet the unit output range constraints:

[0086]

[0087] in, It indicates the output of unit i after mutual assistance, positive and standby call at time t, It represents the output of unit i after mutual assistance negative reserve call at time t;

[0088] Sub-regional balance constraints:

[0089] Region A accepts the balance constraint of other regions' mutual aid and reserve:

[0090]

[0091] The balance constraint for the mutual reserve provided by region j to region A is:

[0092]

[0093] Cross-regional section flow constraints:

[0094] After the positive and standby power supply is mutually beneficial, the power flow in section A of area does not exceed the limit:

[0095]

[0096] After the positive and reserve forces are mutually beneficial, the flow at section j in area does not exceed the limit:

[0097]

[0098] After the negative reserve mutual assistance, the power flow in section A of area does not exceed the limit:

[0099]

[0100] After the negative reserve mutual assistance, the flow of section j in area does not exceed the limit:

[0101]

[0102] Among them, f s min 、f s max It indicates the upper and lower limits of the flow of section s; G indicates the sensitivity of the equipment to the section.

[0103] The present invention also adopts a computer device, including a memory, a processor, and a computer program stored in the memory and executable on the processor, wherein the processor implements the steps of the above method when executing the computer program.

[0104] The present invention also adopts a computer-readable storage medium on which a computer program is stored, and the computer program implements the steps of the above method when executed by a processor.

[0105] Beneficial effects: Compared with the prior art, the significant advantage of the present invention is that based on the start-up and shutdown strategies of the units in the determined mutual assistance areas, a coordinated decision on the start-up mode in the interconnected power grid is obtained, and the surplus and shortage mutual assistance capacity of the interconnected power grid is improved by adjusting the start-up and shutdown of the units. Based on the spare reserved capacity constraints of the units, the surplus space of the channels between the regions is taken into account, and the spare mutual assistance capacity is improved in the effective spare mutual assistance reservation of the regional power grid. By considering the constraint that the section flow of the region and the mutual assistance area does not exceed the limit, and taking into account the situation that the spare supply side and the demand side are jointly affected by the flow of the key section, it is ensured that the spare is fully available during the calling process, thereby improving the effectiveness of the spare. BRIEF DESCRIPTION OF THE DRAWINGS

[0106] Figure 1 It is a flow chart of the effective reserve mutual assistance reservation method for the regional power grid in the present invention. DETAILED DESCRIPTION

[0107] Example 1

[0108] like Figure 1As shown, in this embodiment, a strategy determination method for satisfying effective reserve mutual assistance reservation of regional interconnected power grids is provided. In this embodiment, the provincial grid is used as the minimum unit for realizing power and electricity balance, and the interconnection and mutual assistance capabilities between provincial grid systems are utilized to promote deep sharing of reserve capacity within the regional interconnected power grid and realize inter-provincial mutual assistance, including the following steps:

[0109] Step 1: Assess whether the reserve resources in the province meet the reserve demand.

[0110] Step 1.1: Determine the reserve demand in the province. Obtain the forecast deviation range of new energy and load at each node in the province at time t in the future: Determine the positive and negative standby reserve requirements within the province;

[0111] The reserve capacity demand within the province must meet the forecast deviation of the province:

[0112]

[0113] In the formula, K A,nd Indicates whether node nd belongs to province A. If so, K A,nd =1, otherwise, It indicates that province A has positive spare demand; It indicates the negative reserve demand of Province A.

[0114] Step 1.2: Construct a provincial dispatch model to calculate whether the reserve resources are sufficient. The provincial dispatch model aims to maximize the consumption of new energy, comprehensively considers power balance and unit operation constraints, and solves the reserve shortage in the province.

[0115] 1) Optimization goals

[0116]

[0117] Where T represents the total number of time periods considered; M R represents the reserve shortage penalty factor, It indicates the positive and negative reserve shortage of province A; E indicates the set of new energy units, and N indicates the number of units. represents the upper limit of unit i in period t; p i,t Represents the output of unit i in period t.

[0118] 2) Constraints

[0119] (1) Power balance model

[0120] The total system load is equal to the total power generation of the units plus the tie line plan:

[0121]

[0122] In the formula, NT represents the number of tie lines; Ptie,t represents the inter-provincial tie line plan, which is a fixed curve; I represents the number of busbar loads, d l,t Represents the predicted value of bus load l.

[0123] (2) Backup constraints

[0124] The provincial reserve must meet the total reserve demand:

[0125]

[0126] The positive and standby reserve of the unit needs to meet the unit output range constraints:

[0127]

[0128] The negative standby reserve of the unit needs to meet the unit output range constraints:

[0129]

[0130] In the formula, K A,i Indicates whether unit i belongs to province A. If unit i belongs to province A, then K A,i =1, otherwise, K A,i =0; represents the positive and negative spare reserved capacity of unit i in period t; u i,t Indicates the startup mode of unit i in period t, u i,t =1 means the unit is on, u i,t =0 means the unit is shut down. It indicates the output of unit i after the reserve call in the province during period t. They represent the upper and lower limits of the output of unit i in period t respectively.

[0131] (3) Unit operation constraints

[0132] The unit operation constraints include the upper and lower limit constraints of the unit output and the climbing and landslide constraints. These are conventional constraints and will not be elaborated on here.

[0133] Step 1.3: Solve the provincial dispatch model to obtain the provincial reserve shortage. If the provincial reserve shortage dR A,t is 0, then the reserve of province A meets the demand and no reserve mutual assistance is needed; if the reserve shortage in the province is dR A,t If it is greater than 0, the reserve cannot meet the demand and reserve mutual assistance is carried out.

[0134] Step 2: Build an inter-provincial standby support model and carry out inter-provincial mutual assistance.

[0135] Step 2.1: Construct an objective function with the minimum inter-provincial reserve support deficit as the goal:

[0136]

[0137] In the formula, NJ represents the number of provinces with mutual assistance, It means that Province J provides mutual aid reserve shortage to Province A.

[0138] Step 2.2: Construct inter-provincial reserve capacity constraints:

[0139] (1) Based on the determined reserve shortage within the province and the mutual assistance ratio of each province, determine the reserve capacity constraints for mutual assistance in each province:

[0140]

[0141] In the formula, K J,i Indicates whether unit i belongs to province J. If it does, then K J,i =1, otherwise,

[0142] K J,i =0; represents the mutual positive and negative reserve capacity of unit i at time t; It indicates the mutual aid reserve ratio provided by Province J to Province A.

[0143] (2) The inter-provincial positive and negative standby support capacity reservation needs to meet the unit output range constraints:

[0144]

[0145] In the formula, u i,t represents the startup mode of unit i at time t, u i,t =1 means the unit is on, u i,t =0 means the unit is shut down. It represents the output of unit i after the mutual reserve call in period t.

[0146] Step 2.3: Construct regional and provincial balance constraints:

[0147] Province A accepts the reserve mutual aid from other provinces and then issues the balance constraint:

[0148]

[0149] The balance constraint for the reserve mutual aid provided by province J to province A is:

[0150]

[0151] Step 2.4: Construct the inter-provincial section flow constraints taking into account the reserve effectiveness:

[0152] After the positive and standby mutual assistance, the flow of the provincial section A does not exceed the limit:

[0153]

[0154] After the positive and reserve are mutually beneficial, the flow of the section J does not exceed the limit:

[0155]

[0156] After the negative reserve mutual assistance, the flow of the provincial section A does not exceed the limit:

[0157]

[0158] After the positive and reserve are mutually beneficial, the flow of the section J does not exceed the limit:

[0159]

[0160] In the formula, f s min 、f s max It indicates the upper and lower limits of the flow of section s; G indicates the sensitivity of the equipment to the section.

[0161] Step 3: Solve the inter-provincial reserve support model and determine the unit start-up and shutdown strategies of the mutually beneficial provinces that meet the reserve reserve needs within the region.

[0162] In the prior art, the critical section margin factor is considered in the effective reserve allocation method, but only the influence of the critical section limit constraint on the reserve supply side is considered, and the influence of the critical section flow on the reserve demand side is not considered, resulting in that the reserve capacity cannot be fully and effectively called. In this embodiment, by considering the constraint that the section flow of the region and the mutual assistance region does not exceed the limit, and taking into account the influence of the critical section flow on both the reserve supply side and the demand side, it is ensured that the reserve is fully available during the calling process, thereby improving the reserve effectiveness.

[0163] Example 2

[0164] In this embodiment, the encryption system adopts a strategy determination system that satisfies the effective reserve mutual assistance reservation of the regional interconnected power grid, including:

[0165] A module for confirming the reserve shortage in a region is used to determine the reserve shortage in a region based on the reserve reservation demand in the region and the maximum consumption of new energy, based on the reserve constraint conditions in the region;

[0166] A mutual aid strategy determination module is used to determine the unit start-up and shutdown strategy of the mutual aid area that meets the reserve reservation demand in the area based on the reserve shortage in the area and the minimum cross-regional reserve support shortage as the goal, based on the cross-regional reserve mutual aid constraint conditions;

[0167] The cross-regional reserve mutual aid constraint condition includes a cross-regional section flow constraint, and the cross-regional section flow constraint includes: after the reserve mutual aid, the regional section flow of the region does not exceed the limit and the regional section flow of the mutual aid region does not exceed the limit.

[0168] The reserve requirement in the region includes positive reserve requirement and negative reserve requirement The reserve requirement in the region meets the load forecast deviation in the region:

[0169]

[0170] Among them, K A,nd Indicates whether the node nd belongs to region A, K A,nd =1 means node nd belongs to region A, K A,nd =0 means that node nd does not belong to area A; e nd,t It represents the load forecast deviation of node nd at time t. The load forecast deviation range of node nd at time t is

[0171] The objective function for maximizing the consumption of new energy is:

[0172]

[0173] Where T represents the total number of time periods considered; M R represents the reserve shortage penalty factor; Indicates that area A is in reserve. Indicates the negative reserve shortage in area A; E indicates the set of new energy units; N indicates the number of units; represents the upper limit of unit i at time t; p i,t Represents the output of unit i at time t.

[0174] The reserve constraint conditions within the region include:

[0175] Power balance constraints:

[0176] The total system load is equal to the total power generation of the units plus the tie line plan:

[0177]

[0178] Where NT represents the number of tie lines; P tie,t represents the inter-regional tie line plan, which is a fixed curve; I represents the number of bus loads, d l,t represents the predicted value of bus load l;

[0179] Alternative constraints:

[0180] The intra-regional spares meet the spare reservation requirements of the total used region:

[0181]

[0182]

[0183] The positive and standby reserves of the units meet the unit output range constraints:

[0184]

[0185] The negative standby reserve of the unit needs to meet the unit output range constraints:

[0186]

[0187] Among them, K A,i Indicates whether unit i belongs to area A, K A,i =1 means unit i belongs to area A, K A,i =0 means unit i does not belong to area A; represents the positive reserve capacity of unit i at time t, represents the negative reserve capacity of unit i at time t; u i,t represents the startup mode of unit i at time t, u i,t =1 means the unit is on, u i,t =0 means the unit is shut down; It indicates the output of unit i after being called into standby mode in the area at time t. It represents the output of unit i after negative reserve call in the area at time t; represents the lower limit of the output of unit i at time t, Represents the lower limit of the output of unit i at time t.

[0188] The objective function for minimizing the shortage of cross-regional standby support is:

[0189]

[0190] Among them, NJ represents the number of mutual aid areas, It represents the mutual aid positive reserve shortfall provided by region J to region A. It represents the mutual aid negative reserve deficit provided by region J to region A.

[0191] The cross-regional reserve mutual aid constraint conditions include:

[0192] Constraints on the reserved capacity for mutual assistance in each region:

[0193]

[0194] Among them, K J,i Indicates whether unit i belongs to area J, K J,i =1 means unit i belongs to area J, K J,i =0 means unit i does not belong to area J; represents the mutual positive reserve capacity of unit i at time t, represents the mutual negative reserve capacity of unit i at time t; It indicates the proportion of mutual aid reserve provided by region J to region A;

[0195] The inter-regional positive and negative standby support capacity is reserved to meet the unit output range constraints:

[0196]

[0197] in, It indicates the output of unit i after mutual assistance, positive and standby call at time t, It represents the output of unit i after mutual assistance negative reserve call at time t;

[0198] Sub-regional balance constraints:

[0199] Region A accepts the balance constraint of other regions' mutual aid and reserve:

[0200]

[0201] The balance constraint for the mutual reserve provided by region j to region A is:

[0202]

[0203] Cross-regional section flow constraints:

[0204] After the positive and standby power supply is mutually beneficial, the power flow in section A of area does not exceed the limit:

[0205]

[0206] After the positive and reserve forces are mutually beneficial, the flow at section j in area does not exceed the limit:

[0207]

[0208] After the negative reserve mutual assistance, the power flow in section A of area does not exceed the limit:

[0209]

[0210] After the negative reserve mutual assistance, the flow of section j in area does not exceed the limit:

[0211]

[0212] Among them, f s min 、f s max It indicates the upper and lower limits of the flow of section s; G indicates the sensitivity of the equipment to the section.

[0213] Example 3

[0214] An embodiment of the present invention discloses a strategy determination device that satisfies effective standby mutual assistance reservation for regional interconnected power grids. The device can be applied in power systems, such as for effective standby mutual assistance reservation for regional interconnected power grids, and the embodiment of the present invention does not limit this.

[0215] The device may include a processor and a memory, wherein the memory stores computer instructions, and the processor is used to execute the computer instructions stored in the memory. When the computer instructions are executed by the processor, the electronic device implements the steps of the method described in the above embodiment and can achieve the technical effect consistent with the above method.

[0216] The memory may include computer system readable media in the form of volatile memory, such as random access memory (RAM) and / or cache memory. The device may further include other removable / non-removable, volatile / non-volatile computer system storage media. By way of example only, the memory may be used to read and write non-removable, non-volatile magnetic media (commonly referred to as a "hard drive"). A program / utility having a set (at least one) of program modules may be stored in, for example, the memory, such program modules including but not limited to an operating system, one or more application programs, other program modules, and program data, each of which or some combination may include the implementation of a network environment. The program modules typically perform the functions and / or methods in the embodiments described herein.

[0217] The processor executes various functional applications and data processing by running the program stored in the memory, such as implementing the method provided in the first embodiment of the present invention.

[0218] Example 4

[0219] Embodiment 4 of the present invention further provides a computer-readable storage medium on which a computer program is stored. When the program is executed by a processor, the steps of the method described in the above embodiment are implemented and the technical effect consistent with the above method can be achieved.

[0220] The computer storage medium of the embodiment of the present invention can adopt any combination of one or more computer-readable media. The computer-readable medium can be a computer-readable signal medium or a computer-readable storage medium. The computer-readable storage medium can be, for example, but not limited to, a system, device or device of electricity, magnetism, light, electromagnetic, infrared, or semiconductor, or any combination of the above. More specific examples (non-exhaustive list) of computer-readable storage media include: an electrical connection with one or more wires, a portable computer disk, a hard disk, a random access memory (RAM), a read-only memory (ROM), an erasable programmable read-only memory (EPROM or flash memory), an optical fiber, a portable compact disk read-only memory (CD-ROM), an optical storage device, a magnetic storage device, or any suitable combination of the above. In this document, a computer-readable storage medium can be any tangible medium containing or storing a program, which can be used by an instruction execution system, a device or a device or used in combination with it.

[0221] Computer-readable signal media may include data signals propagated in baseband or as part of a carrier wave, which carry computer-readable program code. Such propagated data signals may take a variety of forms, including but not limited to electromagnetic signals, optical signals, or any suitable combination of the above. Computer-readable signal media may also be any computer-readable medium other than a computer-readable storage medium, which may send, propagate, or transmit a program for use by or in conjunction with an instruction execution system, apparatus, or device.

[0222] The program code embodied on the computer readable medium may be transmitted using any appropriate medium, including but not limited to wireless, wireline, optical fiber cable, RF, etc., or any suitable combination of the foregoing.

[0223] Computer program code for performing the operation of the present invention may be written in one or more programming languages ​​or combinations thereof, including object-oriented programming languages ​​such as Java, Smalltalk, C++, and conventional procedural programming languages ​​such as "C" or similar programming languages. The program code may be executed entirely on the user's computer, partially on the user's computer, as a separate software package, partially on the user's computer and partially on a remote computer, or entirely on a remote computer or server. In cases involving a remote computer, the remote computer may be connected to the user's computer through any type of network including a local area network (LAN) or a wide area network (WAN), or may be connected to an external computer (e.g., via the Internet using an Internet service provider).

[0224] Of course, the storage medium containing computer executable instructions provided by an embodiment of the present invention, whose computer executable instructions are not limited to the above method operations, can also execute related operations in the method provided by any embodiment of the present invention.

[0225] The specific embodiments described above further illustrate the objectives, technical solutions and beneficial effects of the present invention in detail. It should be understood that the above description is only a specific embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A method for determining a strategy to meet the requirements of effective reserve mutual assistance reservation for regional interconnected power grids, characterized in that: The following steps are involved: According to the reserve reserve demand in the region, with the goal of maximizing the consumption of new energy, the reserve shortage in the region is determined based on the reserve constraints in the region; According to the reserve shortage in the region, with the goal of minimizing the cross-regional reserve support shortage, the unit start-up and shutdown strategy of the mutual assistance region that meets the reserve reservation demand in the region is determined based on the cross-regional reserve mutual assistance constraint conditions; The cross-regional reserve mutual aid constraint condition includes a cross-regional section flow constraint, and the cross-regional section flow constraint includes: after the reserve mutual aid, the regional section flow of the region does not exceed the limit and the regional section flow of the mutual aid region does not exceed the limit.

2. The method for determining a strategy for satisfying effective reserve mutual assistance reservation of regional interconnected power grids according to claim 1, characterized in that: The reserve requirement in the region includes positive reserve requirement and negative reserve requirement The reserve requirement in the region meets the load forecast deviation in the region: Among them, K A,nd Indicates whether the node nd belongs to region A, K A,nd =1 means node nd belongs to region A, K A,nd =0 means that node nd does not belong to area A; e nd,t It represents the load forecast deviation of node nd at time t. The load forecast deviation range of node nd at time t is 3. The strategy determination method for satisfying the effective reserve mutual assistance reservation of regional interconnected power grids according to claim 2 is characterized in that: The objective function for maximizing the consumption of new energy is: Where T represents the total number of time periods considered; M R represents the reserve shortage penalty factor; Indicates that area A is in reserve. Indicates the negative reserve shortage in area A; E indicates the set of new energy units; N indicates the number of units; represents the upper limit of unit i at time t; p i,t Represents the output of unit i at time t.

4. The method for determining a strategy for satisfying effective reserve mutual assistance reservation of regional interconnected power grids according to claim 3, characterized in that: The reserve constraint conditions within the region include: Power balance constraints: The total system load is equal to the total power generation of the units plus the tie line plan: Where NT represents the number of tie lines; P tie,t represents the inter-regional tie line plan, which is a fixed curve; I represents the number of bus loads, d l,t represents the predicted value of bus load l; Alternative constraints: The intra-regional spares meet the spare reservation requirements of the total used region: The positive and standby reserves of the units meet the unit output range constraints: The negative standby reserve of the unit needs to meet the unit output range constraints: Among them, K A,i Indicates whether unit i belongs to area A, K A,i =1 means unit i belongs to area A, K A,i =0 means unit i does not belong to area A; represents the positive reserve capacity of unit i at time t, represents the negative reserve capacity of unit i at time t; u i,t represents the startup mode of unit i at time t, u i,t =1 means the unit is on, u i,t =0 means the unit is shut down; It indicates the output of unit i after being called into standby mode in the area at time t. It represents the output of unit i after negative reserve call in the area at time t; represents the lower limit of the output of unit i at time t, Represents the lower limit of the output of unit i at time t.

5. The method for determining a strategy for satisfying effective reserve mutual assistance reservation of regional interconnected power grids according to claim 4, characterized in that: The objective function for minimizing the shortage of cross-regional standby support is: Among them, NJ represents the number of mutual aid areas, It represents the mutual aid positive reserve shortfall provided by region J to region A. It represents the mutual aid negative reserve deficit provided by region J to region A.

6. The method for determining a strategy for satisfying effective reserve mutual assistance reservation of regional interconnected power grids according to claim 5, characterized in that: The cross-regional reserve mutual aid constraint conditions include: Constraints on the reserved capacity for mutual assistance in each region: Among them, K J,i Indicates whether unit i belongs to area J, K J,i =1 means unit i belongs to area J, K J,i =0 means unit i does not belong to area J; represents the mutual positive reserve capacity of unit i at time t, represents the mutual negative reserve capacity of unit i at time t; It indicates the proportion of mutual aid reserve provided by region J to region A; The inter-regional positive and negative standby support capacity is reserved to meet the unit output range constraints: in, It indicates the output of unit i after mutual assistance, positive and standby call at time t, It represents the output of unit i after mutual assistance negative reserve call at time t; Sub-regional balance constraints: Region A accepts the balance constraint of other regions' mutual aid and reserve: The balance constraint for the mutual reserve provided by region j to region A is: Cross-regional section flow constraints: After the positive and standby power supply is mutually beneficial, the power flow in section A of area does not exceed the limit: After the positive and reserve forces are mutually beneficial, the flow at section j in area does not exceed the limit: After the negative reserve mutual assistance, the power flow in section A of area does not exceed the limit: After the negative reserve mutual assistance, the flow of section j in area does not exceed the limit: in, It indicates the upper and lower limits of the flow of section s; G indicates the sensitivity of the equipment to the section.

7. A strategy determination system for satisfying effective reserve mutual assistance reservation of regional interconnected power grids, characterized in that: include: A module for confirming the reserve shortage in a region is used to determine the reserve shortage in a region based on the reserve reservation demand in the region and the maximum consumption of new energy, based on the reserve constraint conditions in the region; A mutual aid strategy determination module is used to determine the unit start-up and shutdown strategy of the mutual aid area that meets the reserve reservation demand in the area based on the reserve shortage in the area and the minimum cross-regional reserve support shortage as the goal, based on the cross-regional reserve mutual aid constraint conditions; The cross-regional reserve mutual aid constraint condition includes a cross-regional section flow constraint, and the cross-regional section flow constraint includes: after the reserve mutual aid, the regional section flow of the region does not exceed the limit and the regional section flow of the mutual aid region does not exceed the limit.

8. The strategy determination system for satisfying effective reserve mutual assistance reservation of regional interconnected power grids according to claim 7 is characterized in that: The reserve requirement in the region includes positive reserve requirement and negative reserve requirement The reserve requirement in the region meets the load forecast deviation in the region: Among them, K A,nd Indicates whether the node nd belongs to region A, K A,nd =1 means node nd belongs to region A, K A,nd =0 means that node nd does not belong to area A; e nd,t It represents the load forecast deviation of node nd at time t. The load forecast deviation range of node nd at time t is 9. The strategy determination system for satisfying effective reserve mutual assistance reservation of regional interconnected power grids according to claim 8, characterized in that: The objective function for maximizing the consumption of new energy is: Where T represents the total number of time periods considered; M R represents the reserve shortage penalty factor; Indicates that area A is in reserve. Indicates the negative reserve shortage in area A; E indicates the set of new energy units; N indicates the number of units; represents the upper limit of unit i at time t; p i,t Represents the output of unit i at time t.

10. The strategy determination system for satisfying the effective reserve mutual aid reservation of regional interconnected power grids according to claim 9, characterized in that: The reserve constraint conditions within the region include: Power balance constraints: The total system load is equal to the total power generation of the units plus the tie line plan: Where NT represents the number of tie lines; P tie,t represents the inter-regional tie line plan, which is a fixed curve; I represents the number of bus loads, d l,t represents the predicted value of bus load l; Alternative constraints: The intra-regional spares meet the spare reservation requirements of the total used region: The positive and standby reserves of the units meet the unit output range constraints: The negative standby reserve of the unit needs to meet the unit output range constraints: Among them, K A,i Indicates whether unit i belongs to area A, K A,i =1 means unit i belongs to area A, K A,i =0 means unit i does not belong to area A; represents the positive reserve capacity of unit i at time t, represents the negative reserve capacity of unit i at time t; u i,t represents the startup mode of unit i at time t, u i,t =1 means the unit is on, u i,t =0 means the unit is shut down; It indicates the output of unit i after being called into standby mode in the area at time t. It represents the output of unit i after negative reserve call in the area at time t; represents the lower limit of the output of unit i at time t, Represents the lower limit of the output of unit i at time t.

11. The strategy determination system for satisfying effective reserve mutual assistance reservation of regional interconnected power grids according to claim 10, characterized in that: The objective function for minimizing the shortage of cross-regional standby support is: Among them, NJ represents the number of mutual aid areas, It represents the mutual aid positive reserve shortfall provided by region J to region A. It represents the mutual aid negative reserve deficit provided by region J to region A.

12. The strategy determination system for satisfying the effective reserve mutual assistance reservation of regional interconnected power grids according to claim 11, characterized in that: The cross-regional reserve mutual aid constraint conditions include: Constraints on the reserved capacity for mutual assistance in each region: Among them, K J,i Indicates whether unit i belongs to area J, K J,i =1 means unit i belongs to area J, K J,i =0 means unit i does not belong to area J; represents the mutual positive reserve capacity of unit i at time t, represents the mutual negative reserve capacity of unit i at time t; It indicates the proportion of mutual aid reserve provided by region J to region A; The inter-regional positive and negative standby support capacity is reserved to meet the unit output range constraints: in, It indicates the output of unit i after mutual assistance, positive and standby call at time t, It represents the output of unit i after mutual assistance negative reserve call at time t; Sub-regional balance constraints: Region A accepts the balance constraint of other regions' mutual aid and reserve: The balance constraint for the mutual reserve provided by region j to region A is: Cross-regional section flow constraints: After the positive and standby power supply is mutually beneficial, the power flow in section A of area does not exceed the limit: After the positive and reserve forces are mutually beneficial, the flow at section j in area does not exceed the limit: After the negative reserve mutual assistance, the power flow in section A of area does not exceed the limit: After the negative reserve mutual assistance, the flow of section j in area does not exceed the limit: in, It indicates the upper and lower limits of the flow of section s; G indicates the sensitivity of the equipment to the section.

13. A computer device comprising a memory, a processor and a computer program stored in the memory and executable on the processor, characterized in that: When the processor executes the computer program, the steps of the method according to any one of claims 1 to 6 are implemented.

14. A computer-readable storage medium having a computer program stored thereon, characterized in that: When the computer program is executed by a processor, the steps of the method according to any one of claims 1 to 6 are implemented.

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